Electronic Catalog by Pauline Kenna

BHC-08

Leaders in the world of High Frequency Magnetics When your products require High Frequency Magnetics, we invite you to contact BH Electronics. Our in-depth product knowledge, long history of manufacturing experience and high quality standards are ready to meet your exact needs. No other manufacturer can match our range of products and services. Standard Products Linear Technology, Maxim, TI, IXYS and others trust BH Electronics and feature BH magnetics in their Application Notes for their most advanced chipsets. Custom Magnetics BH engineers create the design that is right for your application. Video Components Cutting edge applications of broadband and baseband video over unshielded twisted pair (UTP) cable. Test Baluns The gold standard for testing low voltage cable and wiring system products. Specialty Products BH excels in the design and manufacture of sensors, filter assemblies and PCB mounted magnetics. Let our technical sales representatives review your requirements. We focus on continuing to set the standard of excellence in High Frequency Magnetics. Challenge us with your most demanding applications and youâ&#x20AC;&#x2122;ll see what BH Electronics means when we sayâ&#x20AC;Ś

Innovative Minds...Exceptional Quality

The Technology of Magnetics High Frequency Magnetics designed and manufactured by BH Electronics participate in a broad range of electronic products for a number of important markets. These include Telecom/Data Communications, Medical, Industrial, Military and Aerospace and Video Communications. Product design engineers in all of these markets face major technical concerns such as: Cost reduction Size and component reduction Speed of operation RFI/EMI interference Thermal management

BH products play a key role in addressing these concerns. New high performance power supplies operate at frequencies of 500 KHz of more. We have extensive experience in Power and Control magnetics for power supply transformers and inductors for high frequencies. From assistance in selecting a BH standard component to designing a custom part to fit the exact application, BH engineers are known for their superior customer support. New products in Telecom/Data Communications are operating faster. Frequencies of 900 MHz and higher are now common and will increase in the future. As with Power and Control magnetics, BH engineers know the requirements of high frequency Signal Control. We routinely assist customers with standard or custom solutions to their unique needs. BH engineers set the industry standard in customer support from efficient, cost effective designs, to fast turn around of prototypes and samples. Our in-depth product knowledge and unique creative solutions will help meet your exacting needs. Contact BH Electronics today for engineering support and expertise in High Frequency Magnetics. This valuable resource can be readily accessed via phone, e-mail or on the World Wide Web.

Markets....................................5

Telecom/Data Communications Medical Industrial Military and Aerospace Video Communications Lynx Broadband

SMT Dual Inductors/Transformers; CM Chokes. ....6 -18

QTR-Pak® & QTR-PakII® SMT Dual Inductors/1:1 Transformers....... 7-9 8th -Pak™ & 8th -PakII™ SMT Dual Inductors/1:1 Transformers.....10-12 Mini-Pak® & Mini-PakII™ SMT Dual Inductors/Transformers.......13-15 Comparing QTR-Pak & Mini-Pak Performance................................. 16 Common Mode Power Chokes..................................................... 17 Variations in Pak Applications....................................................... 18 Power and Control Magnetics.................................19-25 DC-DC Converter Transformers...................................................... 19 Standard Geometries.............................................................20-22 < 1 Watt............................................................................ 20 1 to 25 Watts..................................................................... 21 26 to 100 Watts................................................................. 22 Toroid Inductors for Switching Power Supplies................................ 23 Control Transformers: MOSFET/TRIAC/SCR Trigger......................... 24 Current Sense Transformers......................................................... 25

Product Sections Preview....................................4

DC-DC Power Products

TABLE OF CONTENTS

Company Overview About BH Electronics..........2 Engineering Manufacturing Testing Quality Products................................3 Standard Magnetics Custom Magnetics Video Components Test Baluns Specialty Products

Signal Control Components Magnetics for Telecommunications and Data Network Circuits.......................................26-28

Common Mode Chokes............................................................... 26 Impedance Matching and Isolation Transformers........................27-28

3 4 5 6

Video Components Baseband Video Components....................................................... 29 Test Baluns Network Test Baluns................................................................... 30 DSL Test Baluns......................................................................... 30 Specialty Products...............................................31-33 Magnetic Assemblies.................................................................. 31 High Current Power Inductors....................................................... 32 Extreme Magnetics for Harsh Environments...............................32-33 APPENDIX Application Notes....................................................................34-36

12219 Wood Lake Drive, Burnsville MN 55337 • Phone 952.894.9590 • Fax 952.894.9380 • www.bhelectronics.com

COMPANY OVERVIEW

Innovative Minds…Exceptional Quality Innovation and quality… Although the BH Electronics story began in 1967, we are a company pointed toward the future. Our advanced products and capabilities meet the growing demand for High Frequency Magnetics. BH has developed a series of standard and custom products - ranging from 20 KHz to 1 GHz - that meet the needs of many of the world’s leading high-tech companies. Our engineering expertise, manufacturing capabilities and quality performance make BH Electronics a leader in the field of High Frequency Magnetics. BH Electronics was named after the BH magnetization or hysteresis curve. The BH curve shows the relationship between flux density (B) and flux intensity (H). The curves help to quantify the basic properties of ferromagnetic materials. The permeability of a magnetic material is the ratio of B to H. Understanding the BH Curve is critical in the design of transformers, inductors and other electronic components.

Engineering – Your magnetics experts BH Electronics has a solid technical understanding of High Frequency Magnetics. Our design engineers are experts in designing magnetic components and have a broad based understanding of end-use applications. BH participates in industry standards committees and we can assist in designing to meet agency approval requirements. Our engineering and technical staff routinely: • Consults with customers in defining specifications • Designs complete devices from electrical and mechanical specifications • Develops package configurations • Recommends modifications or design alternatives based on manufacturability, enhanced performance, cost-effectiveness and product availability

Manufacturing – From prototypes to high volume Complementing our engineering and design is our vertically integrated production capability. BH operates a full prototype lab for fast turnaround on samples and we produce many of our own molds, jigs and fixtures. We can efficiently handle low, medium and high volume manufacturing from our network of facilities in Marshall, MN, Mexico and China. With manufacturing plants in the U.S. and off shore, we offer our customers high quality products that arrive on time at a competitive price.

Testing and Quality – ISO 9001 is just the beginning BH Electronics is committed to Quality. Starting with our ISO 9001 Quality System, BH monitors every step of the product development and manufacturing process. From initial customer consultation, to design review, to high volume manufacture, we follow a rigorous quality process. Traceability is maintained on all materials and our testing capabilities include thermal shock, immersion, temperature cycling, flammability and life testing. Our test equipment is technologically advanced and is calibrated to NIST standards to ensure consistent results.

Our Products Include • Standard Magnetics • Custom Magnetics • Video Components • Test Baluns • Specialty Products

The Markets We Serve • Telecom/Data Communications • Medical • Industrial • Military and Aerospace • Video Communications • Lynx Broadband

12219 Wood Lake Drive, Burnsville MN 55337 • Phone 952.894.9590 • Fax 952.894.9380 • www.bhelectronics.com

Products Standard Products

Custom Magnetics Because they are designed to meet specific cost and performance requirements, custom magnetics are the exact part for the application. There is no need to adapt circuitry to work with a standard product. In addition, they can be built to fit existing package requirements. Other custom magnetics can be manufactured using standard cores, bobbins and cases keeping lead time short and cost down while incorporating the latest developments in technology and safety.

company overview

Standard offerings are competitively priced and stocked in the U.S. for short lead time deliveries. Many are specified for leading chipsets including common mode chokes for the rejection of RFI and EMI on unshielded twisted pair lines and power magnetics including DCDC converter transformers for power supply isolation in data line driver circuits. Most BH standard products can be used in multiple application settings and rapid availability reduces your product design cycle time.

Video Components BH Electronics’ video components transmit either broadband or baseband video over Category 5 or better unshielded twisted pair (UTP) cable. For broadband applications, patented technology simultaneously transmits up to 134 channels of RF television on UTP cable. CATV, satellite, DVD, off-air, and video camera programming can all be simultaneously transmitted on a single twisted pair. For baseband applications, BH components transmit NTSC, PAL, or SECAM signals on UTP cable.

Test Baluns Patented and precise, BH test baluns are designed as balanced to unbalanced impedance matching assemblies for use in the laboratory and on the production line. They are used for testing network cables, connectors, wiring systems and high-speed data circuits for DSL and HPNA. In-line and through-hole PCB mount versions are available.

Specialty Products BH Electronics has extensive capability in the design, prototype, manufacture and testing of specialty, high value added products. These components and assemblies typically contain BH magnetics and can be built in low to high volumes. Examples of recent BH projects include conductivity sensors, media adaptor assemblies, RFIP filters, In-line Microfilters and POTS Splitters for xDSL applications and varied specialty designs for the Military and Medical markets. BH has the experience to design and build the highest quality value added products.

12219 Wood Lake Drive, Burnsville MN 55337 • Phone 952.894.9590 • Fax 952.894.9380 • www.bhelectronics.com

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High Frequency Power Products Pages 6-25

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Signal Control Components Pages 26-28

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BH Electronics High Frequency Power products include dual inductors for DC-DC converter circuits, power inductors, current sense transformers and pulse transformers. Available in a wide range of sizes and configurations, these products are either surface or through-hole mount, low or high current and can have isolation up to 4KV.

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BH offers many unique and hard to find products for specific Signal Control applications. These include impedance matching transformers for data line circuits, common mode filter chokes and intrinsically safe Ethernet magnetics modules. UN NIICC MU MM AA OM O

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BH Electronics’ Video Components are designed to transmit broadband and baseband video over Category 5 or better unshielded twisted pair (UTP) cable. Patented technology in broadband components makes it possible to transmit up to 134 channels of RF video on Cat 5 - simultaneously. CATV, satellite, DVD, VCR, off air, and video camera programming can be modulated and combined into a multi-channel RF signal, which the BH broadband video converter then transmits. Baseband modules for transmitting composite video on UTP are also available.

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company overview

Product Sections PREVIEW

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Specialty Products Pages 31-33

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Patented and precise BH Test Baluns are designed as balanced to unbalanced impedance matching assemblies for use in the laboratory and on the production line. These baluns are used for testing network cables, connectors, wiring systems, high-speed data circuits and for DSL and HPNA. They match 50 to 75Ω unbalanced test equipment with 100 to 900Ω balanced lines and are available for frequencies as low as 200Hz and as high as 650MHz. In-line and through-hole PCB mount versions are available. In addition, we offer a line of 100Ω wide band termination resistors that assure accurate measurement to 650MHz.

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TV TV

Application Notes: These pages contain information which will help you define, specify and select the right magnetic component - transformer, inductor, filter - for your application. It includes definitions, a product selection guide and measurement and specifications parameters.

12219 Wood Lake Drive, Burnsville MN 55337 • Phone 952.894.9590 • Fax 952.894.9380 • www.bhelectronics.com

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APPENDIX Pages 34-36

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BH Electronics has extensive capability in the design, prototype, manufacture and testing of specialty, high value added products. These components and assemblies typically contain BH magnetics and can be built in low to high volumes. Examples of recent BH projects include conductivity sensors, media adaptor assemblies, RFI filters, Microfilters and POTS Splitters for xDSL applications and varied designs for the Military and Medical markets. BH has the experience to design and build the highest quality value added products.

S SSY YSSTTEEM MS

Markets Telecom/Data Communications

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BH Electronics has extensive experience working with designers of precision Medical RO AEER UN DBBA OSS MU AD NIIC MM &A ALL AN RIIA OA N RRO C OM YY & SSTTR CCO equipment. Our High Frequency Magnetics can BBbe found in a number of applications from patient monitoring equipment to defibrillators, infusion systems, biomedical, MRI TV TV equipment and power supplies. We manufactureSSYYto many standards such as UL 1950 and S SSTTEEM MS UL 2601. Medical products require extremely high quality and BH delivers. CEE AC PPA

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Industrial

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AER O BH’s YYexperience in Industrial markets is as diverse as the applications. BH magnetics UN DBBA MU AD NIIC MM & AN O & AERO SS OA N C OM BBRR CCO can be found in welding equipment, flow control apparatus, sensors and many types of instrumentation. We TV TVspecialize in components that can meet the demands of tough S SSY YSSTTEEM MS industrial applications, from miniaturized surface mount components for instrumentation to ruggedized transformers used in oil well down-hole applications that continue to perform at temperatures in excess of 200º C.

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company overview

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Medical

Complex designs are routine in Telecom/Data Communications. Demands RO AEER UN DBBA OSS MU AD NIIC CA IIA MM &A ALL AN DIIC ED ALLmagnetics TR O OA N C M OM ME YY & SSTR BBRR CCO such as higher circuit counts, fewer component parts, reduced system footprints, higher efficiency and improved thermal management areTV just a few of the problems facing this TV S SSY YSSTTEEM M Smagnetics. We can also industry. BH engineers work with both high-speed data and power routinely meet the requirements of UL, CSA, ANSI, IEC, VDE, BABT and other standards. S NS ON TIIO AAT

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Military and Aerospace VIID DEEO V O

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Military and Aerospace products require performance and reliability. BH has dedicated UN DBBA MU AD NIIC MM AN O OA N C OM BBRR CCO a domestic manufacturing team to the rigorous requirements of these applications. We provide for special process and specification requirements including source inspection with TV TV S SSY witnessed testing, controlled manufacturing processes and prints, thermal shock, vibration YSSTTEEM MS and immersion/moisture testing. All lots are 100% inspected per customer’s requirements. BH magnetics can be found in lighting, audio, sensor and guidance systems, night vision equipment, aircraft lighting and other demanding environments. We can design to multiple standards such as Mil-PRF-27, Mil-PRF-21038 and Mil Std. 202. S NS ON TIIO AAT

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DBBA BH Electronics’ patented broadband video modules transmit RF and composite video over AD AN O OA N BBRR Cat 5 or better cable. These products allow video, voice and data to be carried on existing UTP cable networks. They support both analog and digital signals and can be PCB mounted S SSY YSSTTyour EEM MS to meet design requirements. DD

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Lynx Broadband

The Lynx Broadband Division of BH Electronics markets the patented Lynx Video Network and the Lynx Video and Data Network. The Lynx Video Network uses a system of hubs and single port converters to simultaneously distribute up to 134 channels of RF television over dedicated Cat 5, 5e, 6 or higher cable. The Lynx Video and Data Network also distributes RF television but shares the UTP cable with other services such as Ethernet or telephone. Lynx products are ideal for school, business, hospital, hotel, and residential applications. For more information on Lynx Broadband visit www.lynxbroadband.com.

12219 Wood Lake Drive, Burnsville MN 55337 • Phone 952.894.9590 • Fax 952.894.9380 • www.bhelectronics.com

HIGH FREQUENCY POWER PRODUCTS

Meet BH Electronics’ PakTM Family Pb

RoHS COMPLIANT

Mini-PakTM L16-1010 8th-PakTM L11-1013 QTR-PakTM L10-1007

Compared to US 5¢ Coin

Mini-PakTM

12219 Wood Lake Drive, Burnsville MN 55337 • Phone 952.894.9590 • Fax 952.894.9380 • www.bhelectronics.com

L10/L13 Series SMT Mount Dual Inductors/Transformers QTR-PakTM & QTR-Pak IITM

High Performance - High Reliability

• Low EMI, self-shielding toroid based magnetics.

RoHS COMPLIANT

• Pins: 100% matte Sn over Ni plating over brass. • Superior coplanarity vs. wire or self-leaded SMT foot designs. • Magnet wire insulation hand tinned—outside the core area. • No exposed copper - outside or hidden from view by SMT package. • Pin / wire solder terminations 100% available to visual inspection. • Feet available to RoHS reflow temps; pads not “shielded” by core. • Solder-foot bond quality, wetting, can be viewed after reflow. • Dual windings for SEPIC, ZETA and 1:1 transformer circuits. • Variations quickly available: turns ratios; voltage isolation, etc. L10 Series: -40 to 125C Operating Range L13 Series: -40 to 150C Operating Range PIN 1 MARKING

RECOMMENDED PC BOARD LAYOUT

0.400/10.16mm L

1 0.505/12.8mm MAX 0.505/12.8mm MAX

0.400/10.16mm

0.260/6.60mm

0.080/2.03mm DIA.

Comparison L10-1022 QTR-Pak vs L13-1020 QTR-Pak II: L (uH) @ I (Adc)

HIGH FREQUENCY POWER PRODUCTS

• High energy storage in high reliability SMT package.

35 30.4

L10-1022 QTR-Pak Inductance (uH)

Inductance (uH, .x) OR Current (Adc, .xx)

L13-1020 QTR-Pak II Inductance (uH)

29.6

L10-1022 QTR-Pak Current (Adc)

23.6

L13-1020 QTR-Pak II Current Adc

20 19.7 15 11.1 10 10.3 5.58 5

3.10 2.54

0 0

90 100 110 120 Percent Rated Current

3.30 130

140

12219 Wood Lake Drive, Burnsville MN 55337 • Phone 952.894.9590 • Fax 952.894.9380 • www.bhelectronics.com

150

160

170

180

HIGH FREQUENCY POWER PRODUCTS

L10-xxxx QTR-PakTM

High Reliability, SMT Dual Inductors/1:1 Transformers Pb

RoHS COMPLIANT Parallel

Series

BH Part Number

Loc (uH) @0ADC

Typical Loc (uH) Biased 2

Max Current (Adc)3

Parallel DCR (Ohms)1

Loc (uH) @0ADC

Typical Loc (uH) Biased 2

Max Current (Adc)3

Series DCR (Ohms)1

L10-1004 7 L10-1005 L10-1006 L10-1007 L10-1008 L10-1009 L10-1010 L10-1011 L10-1012 L01-0726 L10-1016 L10-1017 L10-1018 L10-1019 L10-1020 L10-1021 L10-1022 L10-1023 L10-1024 L10-1025 L10-1026 L10-1027 L10-1028 L10-1029 L10-1032 L10-1037 L10-1038 L10-1042 L10-1043 L10-1044 L10-1047 L10-1048

1.36 1.85 2.41 3.05 3.77 4.56 5.43 6.37 7.39 8.48 12.21 13.61 15.08 18.25 21.72 25.49 29.56 33.93 38.60 43.58 48.86 54.44 60.32 66.50 86.86 126.82 135.72 174.32 184.73 200.90 247.35 272.38

1.1 1.5 1.9 2.4 3.0 3.6 4.3 5.1 5.9 6.8 9.8 10.9 12.1 14.6 17.4 20.4 23.6 27.1 30.9 34.9 39.1 43.6 48.3 53.2 69.5 101.5 108.6 139.5 147.8 160.7 197.9 217.9

11.87 10.17 8.90 7.91 7.12 6.47 5.94 5.48 5.09 4.75 3.96 3.75 3.56 3.24 2.97 2.74 2.54 2.37 2.23 2.09 1.98 1.87 1.78 1.70 1.48 1.23 1.19 1.05 1.02 0.98 0.88 0.84

0.004 0.004 0.005 0.007 0.010 0.011 0.012 0.013 0.018 0.019 0.023 0.024 0.041 0.045 0.049 0.066 0.071 0.076 0.104 0.110 0.117 0.155 0.164 0.172 0.243 0.373 0.386 0.437 0.450 0.596 0.661 0.694

5.4 7.4 9.7 12.2 15.1 18.2 21.7 25.5 29.6 33.9 48.9 54.4 60.3 73.0 86.9 101.9 118.2 135.7 154.4 174.3 195.4 217.8 241.3 266.0 347.4 507.3 542.9 697.3 738.9 803.6 989.4 1089.5

4.3 5.9 7.7 9.8 12.1 14.6 17.4 20.4 23.6 27.1 39.1 43.6 48.3 58.4 69.5 81.6 94.6 108.6 123.5 139.5 156.3 174.2 193.0 212.8 278.0 405.8 434.3 557.8 591.1 642.9 791.5 871.6

5.94 5.09 4.45 3.96 3.56 3.24 2.97 2.74 2.54 2.37 1.98 1.87 1.78 1.62 1.48 1.37 1.27 1.19 1.11 1.05 0.99 0.94 0.89 0.85 0.74 0.61 0.59 0.52 0.51 0.49 0.44 0.42

0.015 0.018 0.020 0.029 0.040 0.045 0.049 0.053 0.072 0.077 0.092 0.097 0.163 0.180 0.196 0.264 0.284 0.304 0.415 0.441 0.467 0.622 0.654 0.687 0.972 1.491 1.543 1.748 1.800 2.384 2.645 2.776

1. Parallel DCR = DCR per winding / 2. Series DCR = DCR per winding x 2. 2. Inductance measured at 25˚ C. 3. Max. current measured at 25˚ C, 20% inductance roll-off. Above 85˚ C operating temp., max. current is reduced. 4. Plots of Inductance vs. Current available for all above parts. Contact BH. 5. Reflow: 30 Seconds @ 260˚ C maximum. 6. T&R available: 400 per 13" reel, 1,200 minimum release. Smaller quantities shipped in JEDEC trays. 7. Highlighted part numbers are standard products. Others are available as non-standard parts with longer lead times. 8. RoHS parts designated with “L” (e.g., L10-1007). The same part as non-RoHS designated with “5” (e.g., 510-1007). 9. Both RoHS and non-RoHS pins have matte Sn over Ni barrier over brass. Solder is SAC or Sn63/Pb37, respectively. 10. Above parts available with Sn90/Pb10 plated pins on a “custom” part basis. Contact BH for details.

Parallel

Series

Transformer

12219 Wood Lake Drive, Burnsville MN 55337 • Phone 952.894.9590 • Fax 952.894.9380 • www.bhelectronics.com

L13-10xx QTR-Pak IITM High Temperature (150˚C Operating) High Reliability, SMT Dual Inductors/1:1 Transformers

Parallel

Series

Part Number

Loc (uH) @0ADC

Typical Loc (uH) Biased 2

Max Current (Adc)3

Parallel DCR (Ohms)1

Loc (uH) @0ADC

Typical Loc (uH) Biased 2

Max Current (Adc)3

Series DCR (Ohms)1

L13-1000 7 L13-1001 L13-1002 L13-1003 L13-1004 L13-1005 L13-1006 L13-1007 L13-1008 L13-1009 L13-1010 L13-1011 L13-1012 L13-1014 L13-1015 L13-1017 L13-1018 L13-1020 L13-1021 L13-1022 L13-1024 L13-1025 L13-1027 L13-1029 L13-1031 L13-1034 L13-1035 L13-1037 L13-1038 L13-1040 L13-1042

1.90 2.30 2.74 3.21 3.72 4.28 4.86 5.49 6.16 6.86 7.60 9.20 10.9 14.9 17.1 22.0 24.6 30.4 33.5 36.8 43.8 47.5 63.9 82.8 104 141 154 182 198 230 265

1.24 1.49 1.78 2.09 2.42 2.78 3.16 3.57 4.00 4.46 4.94 5.98 7.11 9.68 11.1 14.3 16.0 19.8 21.8 23.9 28.5 30.9 41.5 53.8 67.6 91.3 100 119 128 149 172

13.10 11.79 10.72 9.82 9.07 8.42 7.86 7.37 6.93 6.55 6.20 5.89 5.36 4.53 4.21 3.68 3.47 3.10 2.95 2.81 2.56 2.46 2.18 1.90 1.68 1.44 1.37 1.25 1.20 1.11 1.03

0.006 0.009 0.009 0.013 0.014 0.015 0.020 0.021 0.022 0.023 0.031 0.034 0.037 0.055 0.073 0.083 0.088 0.125 0.131 0.137 0.189 0.197 0.283 0.322 0.458 0.533 0.708 0.771 0.803 0.866 1.175

7.60 9.20 10.9 12.8 14.9 17.1 19.5 22.0 24.6 27.4 30.4 36.8 43.8 59.6 68.4 87.9 98.5 122 134 147 175 190 256 331 416 562 616 730 791 920 1,058

4.94 5.98 7.11 8.35 9.68 11.1 12.6 14.3 16.0 17.8 19.8 23.9 28.5 38.7 44.5 57.1 64.0 79.0 87.1 95.6 114 124 166 215 271 365 400 474 514 598 688

6.55 5.89 5.36 4.91 4.53 4.21 3.93 3.68 3.47 3.27 3.10 2.95 2.68 2.27 2.11 1.84 1.73 1.55 1.47 1.40 1.28 1.23 1.09 0.95 0.84 0.72 0.69 0.63 0.60 0.56 0.52

0.024 0.034 0.037 0.051 0.055 0.058 0.079 0.084 0.089 0.094 0.124 0.136 0.149 0.220 0.293 0.333 0.352 0.500 0.525 0.550 0.757 0.788 1.132 1.288 1.834 2.131 2.833 3.085 3.211 3.462 4.701

HIGH FREQUENCY POWER PRODUCTS

RoHS COMPLIANT

1. Parallel DCR = DCR per winding / 2. Series DCR = DCR per winding x 2. 2. Inductance measured at 25˚ C. 3. Max. current measured at 25˚ C. Max. temp and inductance values stable at high temps. Contact BH for details. 4. Plots of Inductance vs. Current available for all above parts. Contact BH. 5. Reflow: 30 Seconds @ 260˚ C maximum. 6. T&R available: 400 per 13" reel, 1,200 minimum release. Smaller quantities shipped in JEDEC trays. 7. Highlighted part numbers are standard products. Others are available as non-standard parts with longer lead times. 8. Cores have been tested at 200˚ C for 10,000 hours with no harmful effects.

Parallel

Series

12219 Wood Lake Drive, Burnsville MN 55337 • Phone 952.894.9590 • Fax 952.894.9380 • www.bhelectronics.com

Transformer

8th-PakTM & 8th-Pak IITM

High Performance - High Reliability

RoHS COMPLIANT

• High energy storage in high reliability SMT package.

HIGH FREQUENCY POWER PRODUCTS

L11/L14 Series SMT Dual Inductors/Transformers

• Low EMI, self-shielding toroid based magnetics. • Pins: 100% matte Sn over Ni plating over brass. • Superior coplanarity vs. wire or self-leaded SMT foot designs. • Magnet wire insulation hand tinned—outside the core area.

• No exposed copper - outside or hidden from view by SMT package. • Pin / wire solder terminations 100% available to visual inspection. • Feet available to RoHS reflow temps; pads not “shielded” by core. • Solder-foot bond quality, wetting, can be viewed after reflow. • Dual windings for SEPIC, ZETA and 1:1 transformer circuits. • Variations quickly available: turns ratios; voltage isolation, etc.

L11 Series: -40 to 125C Operating Range L14 Series: -40 to 150C Operating Range

0.39/9.9mm MAX.

511-XXXX BH XXXX

RECOMMENDED PC BOARD LAYOUT

0.39/9.9mm MAX. 0.300/7.62mm

0.300/7.62mm

0.080/2.03mm DIA.

0.195/4.95mm MAX.

Comparison L11-1014 8th-Pak vs L14-1027 8th-Pak II: L (uH) @ I (Adc) 14

Inductance (uH, .x) OR Current (Adc, .xx)

12.2 12

L11-1014 8th-Pak Inductance (uH)

10.8

11.5

L14-1027 8th-Pak II Inductance (uH) L11-1014 8th-Pak Current (Adc) L14-1027 8th-Pak II Current Adc

7.9

5.27

4.2 4

2.93

4.3

2.26

1.74 0 0

100

110

120

130

140

150

160

170

180

Percent Rated Current

12219 Wood Lake Drive, Burnsville MN 55337 • Phone 952.894.9590 • Fax 952.894.9380 • www.bhelectronics.com

L11-10xx 8th-PakTM SMT Dual Inductors/1:1 Transformers Pb

Parallel

Series

Part Number

Loc (uH) @0ADC

Typical Loc (uH) Biased 2

Max Current (Adc)3

Parallel DCR (Ohms)1

Loc (uH) @0ADC

Typical Loc (uH) Biased2

Max Current (Adc)3

Series DCR (Ohms)1

L11-1007 7 L11-1008 L11-1009 L11-1010 L11-1110 L11-1011 L11-0033 L11-1012 L11-1013 L11-1014 L11-1015 L11-1016 L11-1017 L11-1018 L11-1019 L11-1020 L11-1021 L11-1022 L11-1023 L11-1024 L11-1025 L11-1026 L11-1027 L11-1028 L11-1029 L11-1030 L11-1031 L11-1032 L11-1033 L11-1034 L11-1035

0.56 0.99 1.55 2.23 3.04 3.97 5.02 6.20 8.93 12.2 15.9 20.1 24.8 30.0 35.7 41.9 48.6 55.8 63.5 71.7 80.4 89.5 99.2 109 120 131 143 155 168 181 194

0.45 0.79 1.24 1.79 2.43 3.17 3.76 4.96 7.14 9.72 12.7 16.1 19.8 24.0 28.6 33.5 38.9 44.6 50.8 57.3 64.3 71.6 79.4 87.5 96.0 105 114 124 134 145 156

8.11 6.08 4.86 4.05 3.47 3.04 2.70 2.43 2.03 1.74 1.52 1.35 1.22 1.11 1.01 0.94 0.87 0.81 0.76 0.72 0.68 0.64 0.61 0.58 0.55 0.53 0.51 0.49 0.47 0.45 0.43

0.002 0.004 0.006 0.007 0.010 0.014 0.013 0.023 0.034 0.050 0.057 0.064 0.090 0.099 0.137 0.149 0.160 0.217 0.231 0.246 0.327 0.345 0.363 0.470 0.493 0.515 0.538 0.560 0.583 0.766 0.794

2.2 4.0 6.2 8.9 12.2 15.9 20.1 24.8 35.7 48.6 63.5 80.4 99.2 120 143 168 194 223 254 287 321 358 397 437 480 525 571 620 671 723 778

1.79 3.17 4.96 7.14 9.72 12.7 15.0 19.8 28.6 38.9 50.8 64.3 79.4 96.0 114 134 156 179 203 229 257 286 317 350 384 420 457 496 536 579 622

4.05 3.04 2.43 2.03 1.74 1.52 1.35 1.22 1.01 0.87 0.76 0.68 0.61 0.55 0.51 0.47 0.43 0.41 0.38 0.36 0.34 0.32 0.30 0.29 0.28 0.26 0.25 0.24 0.23 0.23 0.22

0.007 0.014 0.022 0.027 0.040 0.057 0.050 0.091 0.137 0.198 0.227 0.255 0.360 0.396 0.549 0.594 0.640 0.868 0.926 0.984 1.307 1.379 1.452 1.882 1.972 2.061 2.151 2.240 2.330 3.063 3.176

HIGH FREQUENCY POWER PRODUCTS

RoHS COMPLIANT

1. Parallel DCR = DCR per winding / 2. Series DCR = DCR per winding x 2. 2. Inductance measured at 25˚ C. 3. Max. current measured at 25˚ C, 20% inductance roll-off. Above 85˚ C operating temp., max. current is reduced. 4. Plots of Inductance vs. Current available for all above parts. Contact BH. 5. Reflow: 30 Seconds @ 260˚ C maximum. 6. T&R available: 1,000 per 13" reel. Smaller quantities shipped in JEDEC trays. 7. Highlighted part numbers are standard products. Others are available as non-standard parts with longer lead times. 8. RoHS parts designated with “L” (e.g., L11-1013). The same part as non-RoHS designated with “5” (e.g., 511-1013). 9. Both RoHS and non-RoHS parts have matte Sn over Ni barrier over brass. Solder is SAC or Sn63/Pb37, respectively. 10. Above parts available with Sn90/Pb10 plated pins on a “custom” part basis. Contact BH for details.

Parallel

Series

12219 Wood Lake Drive, Burnsville MN 55337 • Phone 952.894.9590 • Fax 952.894.9380 • www.bhelectronics.com

Transformer

HIGH FREQUENCY POWER PRODUCTS

L14-10xx 8th-Pak IITM High Temperature (150˚C Operating) High Reliability, SMT Dual Inductors/1:1 Transformers

RoHS

COMPLIANT

Parallel

Series

BH Part Number

Loc (uH) @0ADC

Typical Loc (uH) Biased2

Max Current (Adc)3

Parallel DCR (Ohms)1

Loc (uH) @0ADC

Typical Loc (uH) Biased2

Max Current (Adc)3

Series DCR (Ohms)1

L14-1010 L14-1011 L14-1012 L14-1013 L14-1014 L14-1015 L14-1016 L14-1017 L14-1018 L14-1019 L14-1020 L14-1021 L14-1022 L14-1023 L14-1024 L14-1025 L14-1026 L14-1027 L14-1029 L14-1031 L14-1032 L14-1033 L14-1034 L14-1035 L14-1036 L14-1038 L14-1039 L14-1040 L14-1049

0.61 0.83 1.09 1.38 1.70 2.06 2.45 2.87 3.33 3.83 4.35 4.91 5.51 6.14 6.80 8.23 9.79 11.5 15.3 19.7 22.0 24.5 27.2 30.0 32.9 39.2 42.5 46.0 83.3

0.40 0.54 0.71 0.90 1.11 1.34 1.59 1.87 2.17 2.49 2.83 3.19 3.58 3.99 4.42 5.35 6.36 7.47 9.95 12.8 14.3 16.0 17.7 19.5 21.4 25.5 27.6 29.9 54.1

12.70 10.88 9.52 8.46 7.62 6.93 6.35 5.86 5.44 5.08 4.76 4.48 4.23 4.01 3.81 3.46 3.17 2.93 2.54 2.24 2.12 2.00 1.90 1.81 1.73 1.59 1.52 1.46 1.09

0.007 0.011 0.012 0.017 0.019 0.027 0.029 0.040 0.043 0.046 0.062 0.066 0.070 0.074 0.099 0.108 0.146 0.159 0.232 0.263 0.279 0.374 0.393 0.413 0.433 0.598 0.623 0.647 1.350

2.45 3.33 4.35 5.51 6.80 8.23 9.79 11.5 13.3 15.3 17.4 19.7 22.0 24.5 27.2 32.9 39.2 46.0 61.2 78.6 88.1 98.2 109 120 132 157 170 184 333

1.59 2.17 2.83 3.58 4.42 5.35 6.36 7.47 8.66 9.95 11.3 12.8 14.3 16.0 17.7 21.4 25.5 29.9 39.8 51.1 57.3 63.8 70.7 78.0 85.6 102 111 120 217

6.35 5.44 4.76 4.23 3.81 3.46 3.17 2.93 2.72 2.54 2.38 2.24 2.12 2.00 1.90 1.73 1.59 1.46 1.27 1.12 1.06 1.00 0.95 0.91 0.87 0.79 0.76 0.73 0.54

0.029 0.043 0.049 0.070 0.077 0.108 0.118 0.159 0.171 0.183 0.250 0.265 0.281 0.297 0.394 0.434 0.585 0.634 0.929 1.053 1.115 1.495 1.574 1.653 1.731 2.390 2.490 2.590 5.398

1. Parallel DCR = DCR per winding / 2. Series DCR = DCR per winding x 2. 2. Inductance measured at 25˚ C. 3. Max. current measured at 25˚ C. Max. temp and inductance values stable at high temps. Contact BH for details. 4. Plots of Inductance vs. Current available for all above parts. Contact BH. 5. Reflow: 30 Seconds @ 260˚ C maximum. 6. T&R available: 1,000 per 13" reel. Smaller quantities shipped in JEDEC trays. 7. Highlighted part numbers are standard products. Others are available as non-standard parts with longer lead times. 8. Cores have been tested at 200˚ C for 10,000 hours with no harmful effects.

Parallel

Series

Transformer

12219 Wood Lake Drive, Burnsville MN 55337 • Phone 952.894.9590 • Fax 952.894.9380 • www.bhelectronics.com

L16/L17 Series SMT Dual Inductors/Transformers Mini-PakTM & Mini-Pak IITM

High Performance - High Reliability

COMPLIANT

Mini-PakTM

• Pin / wire solder terminations 100% available to visual inspection.

8th-Pak

• Feet available to RoHS reflow temps; pads not “shielded” by core.

• Solder-foot bond quality, wetting, can be viewed after reflow.

QTR-PakTM

• Dual windings for SEPIC, ZETA and 1:1 transformer circuits. • Variations quickly available: turns ratios; voltage isolation, etc.

Compared to US 5¢ Coin

L16 Series: -40 to 125C Operating Range L17 Series: -40 to 150C Operating Range

SUGGESTED PAD LAYOUT

0.305/7.75mm MAX. 2

0.230/5.84mm

0.070/1.78mm

0.305/7.75mm MAX.

0.230/5.84mm

0.15/3.81mm MAX.

HIGH FREQUENCY POWER PRODUCTS

RoHS

• High energy storage in low profile SMT package (0.150” / 3.8mm).

Comparison L16-1013 Mini-Pak vs L17-1013 Mini-Pak II: L (uH) @ I (Adc)

Inductance (uH, .x) OR Current (Adc, .xx)

8.4

L16-1013 Mini-Pak Inductance (uH)

8 7

L17-1013 Mini-Pak II Inductance (uH) L16-1013 Mini-Pak Current (Adc)

6.7

7.5

L17-1013 Mini-Pak II Current Adc

6 4.64

5 4.9

3.48

2.68

2.58

2.9

2.8

1 0 0

90 100 110 Percent Rated Current

120

130

140

12219 Wood Lake Drive, Burnsville MN 55337 • Phone 952.894.9590 • Fax 952.894.9380 • www.bhelectronics.com

150

160

170

180

L16-10xx Mini-PakTM

High Reliability, SMT Dual Inductors/1:1 Transformers

HIGH FREQUENCY POWER PRODUCTS

RoHS COMPLIANT Parallel

Series

BH Part Number

Loc (uH) @0ADC

Typical Loc (uH) Biased2

Max Current3

Parallel DCR @20C1

Loc (uH) @0ADC

Typical Loc (uH) Biased2

Max Current3

Series DCR @20C1

L16-1000 L16-1001 L16-1002 L16-1003 L16-1004 L16-1005 L16-1006 L16-1007 L16-1008 L16-1009 L16-1010 L16-1011 L16-1012 L16-1013 L16-1014 L16-1015 L16-1016 L16-1017 L16-1018 L16-1019 L16-1020

0.93 1.17 1.45 1.75 2.09 2.45 2.84 3.26 3.71 4.19 4.70 5.80 7.02 8.35 9.80 11.37 13.05 14.85 16.76 18.79 20.94

0.74 0.94 1.16 1.40 1.67 1.96 2.27 2.61 2.97 3.35 3.76 4.64 5.61 6.68 7.84 9.09 10.44 11.88 13.41 15.03 16.75

8.03 7.13 6.42 5.84 5.35 4.94 4.59 4.28 4.01 3.78 3.57 3.21 2.92 2.68 2.47 2.29 2.14 2.01 1.89 1.78 1.69

0.010 0.011 0.016 0.017 0.024 0.026 0.028 0.036 0.039 0.041 0.056 0.062 0.068 0.094 0.102 0.110 0.149 0.159 0.169 0.224 0.237

3.71 4.70 5.80 7.02 8.35 9.80 11.37 13.05 14.85 16.76 18.79 23.20 28.07 33.41 39.21 45.47 52.20 59.39 67.05 75.17 83.75

2.97 3.76 4.64 5.61 6.68 7.84 9.09 10.44 11.88 13.41 15.03 18.56 22.46 26.73 31.37 36.38 41.76 47.51 53.64 60.13 67.00

4.01 3.57 3.21 2.92 2.68 2.47 2.29 2.14 2.01 1.89 1.78 1.61 1.46 1.34 1.23 1.15 1.07 1.00 0.94 0.89 0.84

0.039 0.044 0.062 0.068 0.094 0.102 0.110 0.146 0.156 0.165 0.222 0.247 0.272 0.376 0.408 0.439 0.596 0.635 0.675 0.896 0.946

L16-1022 L16-1023 L16-1024

25.58 28.07 30.68

20.46 22.46 24.55

1.53 1.46 1.40

0.261 0.338 0.354

102.31 112.29 122.73

81.85 89.83 98.18

0.76 0.73 0.70

1.05 1.35 1.41

L16-1027 L16-1028 L16-1029 L16-1030 L16-1031 L16-1032 L16-1033

39.21 42.28 45.47 48.78 52.20 55.74 59.39

31.37 1.23 0.400 156.83 125.47 0.62 1.60 33.83 1.19 0.525 169.13 135.30 0.59 2.10 36.38 1.15 0.545 181.89 145.51 0.57 2.18 39.02 1.11 0.564 195.11 156.09 0.55 2.26 41.76 1.07 0.584 208.80 167.04 0.54 2.34 44.59 1.04 0.603 222.95 178.36 0.52 2.41 47.51 1.00 0.623 237.57 190.05 0.50 2.49 Omitted and values between L16-1033 and L16-1080 available on a custom basis. Contact BH with your requirement. L16-1080 361.98 289.58 0.41 3.93 1447.91 1158.33 0.20 15.74

Parallel

Series

Transformer

12219 Wood Lake Drive, Burnsville MN 55337 • Phone 952.894.9590 • Fax 952.894.9380 • www.bhelectronics.com

L17-10xx Mini-Pak IITM High Temperature (150˚C Operating) High Reliability, SMT Dual Inductors/1:1 Transformers

COMPLIANT Parallel

Series

BH Part Number

Loc (uH) @0ADC

Typical Loc (uH) Biased2

Max Current3

Parallel DCR @20C1

Loc (uH) @0ADC

Typical Loc (uH) Biased2

Max Current3

Series DCR @20C1

L17-1000 L17-1001 L17-1002 L17-1003 L17-1004 L17-1005 L17-1006 L17-1007 L17-1008 L17-1009 L17-1010 L17-1011 L17-1012 L17-1013 L17-1014 L17-1015 L17-1016 L17-1017 L17-1018 L17-1019 L17-1020 L17-1021 L17-1022 L17-1023

0.83 1.05 1.30 1.57 1.87 2.2 2.5 2.9 3.3 3.8 4.2 5.2 6.3 7.5 8.8 10.2 11.7 13.3 15.0 16.8 18.8 20.8 22.9 25.2

0.54 0.68 0.85 1.02 1.22 1.43 1.66 1.90 2.2 2.4 2.7 3.4 4.1 4.9 5.7 6.6 7.6 8.7 9.8 11.0 12.2 13.5 14.9 16.4

7.74 6.88 6.19 5.63 5.16 4.76 4.42 4.13 3.87 3.64 3.44 3.10 2.81 2.58 2.38 2.21 2.06 1.94 1.82 1.72 1.63 1.55 1.47 1.41

0.010 0.011 0.015 0.017 0.023 0.025 0.027 0.036 0.038 0.041 0.055 0.061 0.067 0.093 0.100 0.108 0.146 0.156 0.166 0.220 0.233 0.245 0.257 0.333

3.3 4.2 5.2 6.3 7.5 8.8 10.2 11.7 13.3 15.0 16.8 20.8 25.2 30.0 35.2 40.8 46.8 53.2 60.1 67.4 75.1 83.2 91.7 101

2.2 2.7 3.4 4.1 4.9 5.7 6.6 7.6 8.7 9.8 11.0 13.5 16.4 19.5 22.8 26.5 30.4 34.6 39.1 43.8 48.8 54.1 59.6 65.4

3.87 3.44 3.10 2.81 2.58 2.38 2.21 2.06 1.94 1.82 1.72 1.55 1.41 1.29 1.19 1.11 1.03 0.97 0.91 0.86 0.81 0.77 0.74 0.70

0.038 0.043 0.061 0.067 0.093 0.100 0.108 0.143 0.153 0.163 0.219 0.243 0.267 0.370 0.401 0.432 0.586 0.625 0.664 0.882 0.931 0.980 1.03 1.33

L17-1026 L17-1027 L17-1028

32.5 35.2 37.9

21.1 22.8 24.6

1.24 1.19 1.15

0.378 0.393 0.517

130 141 152

84.5 91.4 98.6

0.62 0.60 0.57

1.51 1.57 2.07

L17-1031 L17-1032 L17-1033

46.8 50.0 53.2

30.4 32.5 34.6

1.03 1.00 0.97

0.574 0.593 0.612

187 200 213

122 130 138

0.52 0.50 0.48

2.30 2.37 2.45

L17-1037 L17-1038

67.4 71.2

HIGH FREQUENCY POWER PRODUCTS

RoHS

43.8 0.86 0.900 270 175 0.43 3.60 46.3 0.84 0.925 285 185 0.42 3.70 Omitted and values between L17-1038 and L17-1080 available on a custom basis. Contact BH with your requirement. L17-1080 324.5 210.9 0.39 3.87 1298 844 0.20 15.48 1. Parallel DCR = DCR per winding / 2. Series DCR = DCR per winding x 2. 2. Inductance measured at 25˚ C. 3. Max. current measured at 25˚ C. Max. temp and inductance values stable at high temps. Contact BH for details. 4. Plots of Inductance vs. Current available for all above parts. Contact BH. 5. Reflow: 30 Seconds @ 260˚ C maximum. 6. T&R available: 1,250 per 13" reel, 250 per 7" reel. Smaller quantities shipped in JEDEC trays. 7. Highlighted part numbers are standard products. Others are available as non-standard parts with longer lead times. 8. Cores have been tested at 200˚ C for 10,000 hours with no harmful effects.

Parallel

Series

12219 Wood Lake Drive, Burnsville MN 55337 • Phone 952.894.9590 • Fax 952.894.9380 • www.bhelectronics.com

Transformer

QTR-PakTM vs Mini-PakTM

HIGH FREQUENCY POWER PRODUCTS

L10 vs L16 Series SMT Dual Inductors/Transformers

RoHS COMPLIANT

A 10 Year Proven Heritage: High Performance - High Reliability • Mini-Pak comes with all the qualities of QTR-Pak - in a much smaller package. • Like QTR-Pak, Mini-Pak has 2 families with different performance features.

• Nearly 50% of QTR-Pak’s I @ same L in package requiring 20% the volume (see below).

Mini-Pak

0.500”

0.300”

QTR-Pak

0.250” 0.150”

QTR-Pak

Mini-Pak

BH Electronics' QTR-Pak® vs Mini-Pak®: L (uH) @ I (Adc)

8.41

Inductance (uH, .x) OR Current (Adc, .xx)

8 L16-1010 Mini-Pak® Inductance (uH) 7

L10-1009 QTR-Pak® Inductance (uH)

6.47

L16-1010 Mini-Pak® Current (Adc)

L10-1009 QTR-Pak® Current (Adc) 5

4.7

4.6

3.98

3.8 3.6

3.06 2

1.6

0 0

90 100 110 Percent Rated Current

120

130

12219 Wood Lake Drive, Burnsville MN 55337 • Phone 952.894.9590 • Fax 952.894.9380 • www.bhelectronics.com

QTR-PakTM & 8th-PakTM Common Mode Power Chokes • Proven, high reliability SMT package design

COMPLIANT

• Matte Sn over Ni over brass pins • Superior coplanarity • Superior inspectability4 1

• Feet available to reflow solder heat 2

• Available in JEDEC trays or tape & reel 2 3 (L10-400/Reel; L11-1000/Reel)

Series

Parallel BH PART NUMBER L11-0103 L11-0105 L10-0100 L10-0101 L10-0103 L10-0105

TYPE

OCL (Nom.)

IMPEDANCE (Typ.; Min.)

8th-Pak 8th-Pak QTR-Pak QTR-Pak QTR-Pak QTR-Pak

150uH 20uH 9 uH 41 uH 180 uH 98uH

600 Ohms 800 Ohms 600 Ohms 800 Ohms 1.1 kOhms 175 Ohms

Transformer FREQUENCY

DCR/WINDING (Typ.)

RATED CURRENT

TURNS RATIO

10 MHz 100 MHz 100 MHz 10 MHz 10 MHz 100 MHz

19 mOhms 19 mOhms 8 mOhms 16 mOhms 16 mOhms 8 mOhms

3.6 Amps 3.6 Amps 7.9 Amps 5.6 Amps 5.6 Amps 7.9 Amps

1:1 1:1 1:1 1:1 1:1 1:1

Electrical specifications at 25˚ C. Operating temperature range -40˚C to +125˚C

PIN 1 MARKING

0.39/9.9mm MAX.

RECOMMENDED PC BOARD LAYOUT 0.400/10.16mm

511-XXXX BH XXXX

RECOMMENDED PC BOARD LAYOUT

0.39/9.9mm MAX. 0.300/7.62mm

1 0.505/12.8mm MAX 0.505/12.8mm MAX

0.300/7.62mm

0.080/2.03mm DIA.

0.195/4.95mm MAX.

0.400/10.16mm

0.260/6.60mm

COMMON MODE POWER CHOKES

RoHS

• 400 VAC isolation voltage

0.080/2.03mm DIA.

Impedance vs Frequency - BH QTR-Paks (L10-) and 8th-Paks (L11-) 1,400

1327 L11-0103 -- 3.6A Max

1,200

L11-0105 -- 3.6A Max.

1090

1,000

929.9

L10-0100 -- 7.9A Max. L10-0101 -- 5.6A Max.

963.7

L10-0103 -- 5.6A Max.

Impedance (Ohms)

L10-0105 -- 7.9A Max. 800

732.3 652.7

600

400

200

0 0.1

0.5

100 Frequency (MHz)

250

12219 Wood Lake Drive, Burnsville MN 55337 • Phone 952.894.9590 • Fax 952.894.9380 • www.bhelectronics.com

500

800

HIGH FREQUENCY POWER PRODUCTS

Variations: QTR-PakTM, 8th-PakTM and Mini-PakTM

Common Threads: SMT; Space Efficiency; Reliability Turns ratio of 1 to whatever Standard Pak families are 1:1 transformers / dual inductors but there is no reason this ratio could not be incrementally varied to meet your specific need - quickly and efficiently. Whether you need a variation on the standard 1:1 ratio for a SEPIC dual inductor or flyback transformer, we can do that for you - quickly and efficiently. If your 1:1 application could benefit from lower DCR on one side of the circuit than the other - we can do that as well.

MIL-PRF-27F, for Level M, Grade 5, Class S

Contact BH regarding your specific requirement.

Many standard PakTM inductors and their variations have been modified on a custom part number basis to meet the following specifications:

Flyback Transformers; Different Cores?

Life tests performed for 1,000 hours at 130˚ C. Thermal shock, mechanical shock and vibration. Vibration tests that include a 20G peak varied logarithmically between 10-2,000Hz, scanned in + X, Y and Z directions at 20 minutes per frequency cycle for a total of approximately 12 hours. QTR-Paks and 8th-Paks have completed tests. Mini-Paks are in process but not yet approved for MIL-PFR-27. Such tests are possible only because of the SMT structure that is sound in its design: Reliable.

Contact BH and talk with one of our engineers.

Current Sense Transformers? See the Current Sense transformers section of this catalog. Magnetics put into Pak SMT structures provide space efficiency as well as reliability. Contact BH for a N/C sample.

Contact BH with your requirement.

100 a year or 100,000 a Month?

Up to 4,000V isolation

BH Electronics has the multiple capabilities of small or large volume manufacture.

Perhaps you have an application that needs the inductance of one from the standard Pak list of specifications but needs a higher isolation voltage. We can do that. Contact BH Electronics.

Would your application benefit from a different core such as Kool-MU® or other?

Whether “custom” or standard, BH is able to quickly respond to your requirement. If SMT size, performance and reliability are critical to your application - large or small. Check us out.

12219 Wood Lake Drive, Burnsville MN 55337 • Phone 952.894.9590 • Fax 952.894.9380 • www.bhelectronics.com

Power and Control Magnetics DC-DC Converter Transformers

• Designed for use with listed chips and chipsets • Custom designs available in a wide wattage range with Standard Geometries.

ELECTRICAL CHARACTERISTICS @ 25˚ C BH PART NUMBER

TURNS RATIO ISOLATION VOLTAGE

ET-V µSEC

SCHEMATIC

PACKAGE STYLE

500-1635

FOR USE W/MAXIM CHIP SET 250/251 253 845

NOTES (Replaced by 500-2580)

L00-1636

1CT:1

1800

BH009

500-1658

1CT:1

3750

L00-1749 (1)

1CT: 1CT

3750

500-1944

1CT: 1CT

L00-2015

1CT: 1.3CT

500-2017

(formerly Q6471-2)

BH009

BH010

2000

BH001

5V in to 5 or 10V out

1500

BH008

5V in to 5V out @ 100mA

1CT: 2.1CT

1500

BH008

3.3V in to 5V out @ 50mA

500-2019

1CT: 5CT

1500

BH008

5V in to 24V out @ 10mA

L00-2045

1CT: 1.3CT

500

BH008

5V in to 5V out @ 200mA

5V in to 5 or 10V out

L00-2047

1CT 2.1CT

500

BH008

3.3V in to 5V out @ 100mA

500-2049

1CT: 5CT

500

BH008

5V in to 24V out @ 6mA

500-2169

1CT: 1CT

3750

BH006

5V in to 10V OUT

L00-2327

1CT: 1.3CT

3000

BH004

5V in to 5V out @80mA

L00-2345 (2)

1CT: 1.25CT

4000

BH054

500-2451

1CT: 1.3CT

3750

BH008 (3)

500-2580

1CT: 1

2000

100

BH011

500-2582

1:1:1.3

2000

100

BH011

L00-2583

1CT: 1.3CT

2000

BH001

• • • • •

5V in to 5V out @80mA

•

• • • • •

• • • •

• •

HIGH FREQUENCY POWER PRODUCTS

• Intended for power isolation such as data line driver circuits

Note: Part numbers beginning with “L” are RoHS compliant. (1) Recognized UL 1950 file #E147744. (2) Recognized UL 2601 file #E147744. (3) 0.275 max. height. – 1A –

–1–

–2–

–3–

–5– 1

–6–

2 3

–4–

Standard Geometries See Pages 20-22 for Standard Geometries in ranges from < 1 watt up to 100 watts 12219 Wood Lake Drive, Burnsville MN 55337 • Phone 952.894.9590 • Fax 952.894.9380 • www.bhelectronics.com

HIGH FREQUENCY POWER PRODUCTS

Power and Control Magnetics DC-DC Converter Transformers

BH 001

Standard Geometries: <1 Watt

6 5 0.325 MAX.

1 2 3

TOP VIEW

BH002 1 2 3 4

TOP VIEW

SIDE VIEW

0.250 MAX.

0.008

0.375 MAX.

0.250 MAX.

0.024 x 0.015 SUGGESTED PAD LAYOUT

SUGGESTED PAD LAYOUT

0.075 0.100 (4X)

0.050

0.041

0.100 0.290

0.500

0.375

TOP VIEW

BH 005

BH004

BH003 .370 REF.

TOP VIEW

6 5 4

1 2 3

0.292 MAX.

0.375 MAX

0.380 MAX.

0.500

TOP VIEW

0.500 MAX. 0.325 MAX

SIDE VIEW

SEATING PLANE

0.250

0.010 X 0.028 (6X)

0.020

0.425

0.45

0.015 SQ. (8X)

0.265

SIDE VIEW

SUGGESTED PAD LAYOUT

0.100

0.400

0.079 (6X)

0.035

0.385 MAX.

0.280 MAX.

• BH Electronics has a wide range of Standard Geometries to choose from. See below for designs in the <1 watt power range. • Physical size is directly related to frequency of operation and voltage isolation. • Consult BH engineering for your specific application.

8 7 6 5

0.100

0.050

0.080

0.400

0.355 0.375

0.490

BH054

BH006

BH008

0.415

TOP VIEW 8

0.275

L00- 2345 BH XXXX

0.42 1

0.490 MAX.

0.41 MAX.

TOP VIEW

0.41 MAX.

SIDE VIEW

0.25 * MAX.

SIDE VIEW

0.280 MAX

0.500 MAX. B

0.010

0.25 MIN.

0.015 SQ SUGGESTED PAD LAYOUT

0.300

24 AWG.

0.775 REF.

0.150

0.100

BOTTOM VIEW

0.100±0.010 (6X)

0.050

0.300 0.100

0.300

BH010

BH009 0.315 REF.

TOP VIEW

BH011 0.355

TOP VIEW

SIDE VIEW

.270

0.230 MAX.

SIDE VIEW

0.300

BOTTOM VIEW

BOTTOM VIEW 0.100 (4X)

0.450 0.150

0.425

0.400

0.020 DIA. 4

SIDE VIEW

0.120

0.120 MIN.

0.590

0.510

0.380 REF.

TOP VIEW

6 5 4

0.025 X 0.010

0.022 DIA 1 2 3

0.100 (4X)

0.100 (6X) BOTTOM VIEW 1

12219 Wood Lake Drive, Burnsville MN 55337 • Phone 952.894.9590 • Fax 952.894.9380 • www.bhelectronics.com

Power and Control Magnetics DC-DC Converter Transformers

• BH Electronics has a wide range of Standard Geometries to choose from. See below for designs in the 1 to 25 watt power range.

BH050 1 0.510 MAX.

TOP VIEW

10 0.53 MAX.

TOP VIEW 6

5 0.690 MAX. 0.450 MAX.

SIDE VIEW

• Physical size is an inverse relationship to frequency but a direct relationship to voltage isolation. • Consult BH engineering for your specific application.

BH051

0.49 MAX.

0.150 REF. 0.020 DIA. 2

0.100

0.050

0.100

BOTTOM VIEW

SUGGESTED PAD LAYOUT

0.100

8 PIN SURFACE MOUNT VERSION AVAILABLE 0.675

BH053

BH052

BH100 4

1 0.480 MAX.

TOP VIEW

0.755 MAX.

0.450 MAX.

0.940 MAX.

3 0.655 MAX.

0.480 MAX.

SIDE VIEW

0.930 MAX.

TOP VIEW TOP VIEW

0.750 MAX.

SIDE VIEW 0.185 SIDE VIEW 0.300

0.390 MAX. 0.175 MIN.

0.026 DIA. 8

SUGGESTED PAD LAYOUT 0.175

0.300

BOTTOM VIEW

0.022 - 0.029 DIA.

0.800

0.100 5

BOTTOM VIEW

8 PIN SURFACE MOUNT VERSION AVAILABLE

0.660

8 0.100 (6X)

0.150 (4X)

HIGH FREQUENCY POWER PRODUCTS

Standard Geometries: 1 to 25 Watts

0.200 (2X) 0.060

0.445

BH103

BH102

BH101 10

0.870 MAX.

TOP VIEW

0.820 MAX.

TOP VIEW

1.20 REF.

TOP VIEW

0.860 MAX.

1.05 MAX.

1.20 MAX. SIDE VIEW

0.450 MAX.

0.800

SIDE VIEW

0.50 MAX. 0.177 MIN.

0.039 X 0.016 0.640

SUGGESTED PAD LAYOUT

0.060

0.148 (4X)

1.060

0.090 MIN. 6 2 0.100 (5X)

1 0.790

0.750 REF.

0.019 DIA.

BOTTOM VIEW 5

0.148

SIDE VIEW

BOTTOM VIEW

12 PIN SURFACE MOUNT VERSION AVAILABLE

12219 Wood Lake Drive, Burnsville MN 55337 • Phone 952.894.9590 • Fax 952.894.9380 • www.bhelectronics.com

6 7 8

0.100 (4X)

HIGH FREQUENCY POWER PRODUCTS

Power and Control Magnetics DC-DC Converter Transformers

Standard Geometries: 26 to 100 Watts • BH Electronics has a wide range of Standard Geometries to choose from. See below for designs in the 26 to 100 watt power range. • Physical size is directly related to frequency of operation and voltage isolation. • Consult BH engineering for your specific application.

BH500

BH501

1.10 MAX.

TOP VIEW

1.10 MAX.

TOP VIEW

1.10 MAX.

1.10 MAX. 0.52 MAX.

SIDE VIEW

0.510 REF.

SIDE VIEW

0.154

0.043 X 0.016 1.24 6

5 0.787

BOTTOM VIEW 10

0.197

0.197 (8X)

BOTTOM VIEW 10

BH503

BH502

TOP VIEW

0.032 DIA. (10X)

0.886 6

BH1000

0.950 MAX. TOP VIEW

1.70 REF.

1.00 MAX.

1.680 MAX.

TOP VIEW

0.900 MAX.

SIDE VIEW

1.570 MAX.

0.180

1.10 REF.

SIDE VIEW 0.80

0.024 DIA. 0.250 REF.

0.200 (2X) 30∞

BOTTOM VIEW 8 1 0.150 (4X)

SIDE VIEW

1.35 MAX.

0.032 DIA. (11X)

0.100 (6X) BOTTOM VIEW

0.215 NOM.

6 0.200 NOM. (12X)

0.039 DIA.

14 3

11 12

1.300 DIA. PIN CIRCLE

1.00 NOM.

BOTTOM VIEW

BH1003

BH1002

BH 1001

TOP VIEW

1.340 MAX.

TOP VIEW

1.25 MAX.

TOP VIEW

1.42 MAX.

1.37 MAX. 1.25 MAX. 0.530 MAX.

SIDE VIEW

0.54 MAX.

SIDE VIEW

1.350 MAX.

0.110 MIN.

0.020 1.244

0.30 0.032 DIA. (12X)

1.083 5

6 0.197 (10X)

BOTTOM VIEW 1

0.200 (10X) BOTTOM VIEW

BOTTOM VIEW 1

1.20

0.029 SQ. 7

1.10

0.300 0.200 1

12219 Wood Lake Drive, Burnsville MN 55337 • Phone 952.894.9590 • Fax 952.894.9380 • www.bhelectronics.com

• Current range to 50 Amps • Maximum temperature rise of 40º C • Wide range of inductances • Surface mount design and custom package styles available ELECTRICAL CHARACTERISTICS @ 25˚ C BH PART NUMBER

RATED DC CURRENT (AMPS)

MINIMUM INDUCTANCE AT RATED DC (µH)

MINIMUM INDUCTANCE AT ZERO DC (µH)

DC RESISTANCE MAXIMUM (Ω)

MINIMUM ENERGY STORAGE 1/2 L12

PACKAGE STYLE

LEAD DIA. INCHES

501-1002 501-1005 L01-1009 501-1013 501-1015 501-1016 501-1017 501-1020 L01-1089

2.5 4.1 6.5 10.0 20.0 20.0 21.0 50.0 50.0

115 140 140 60 6 15 30 4.5 3.1

230 280 280 120 12 30 60 9 4.23

.12 0.86 .070 0.28 .006 .010 .010 .0016 .0089

3.66 1185 3000 3000 1200 3200 6400 5875 5875

1 2 3 3 5 6 7 7 7

0.025 0.032 0.040 0.051 N/A N/A N/A N/A N/A

Note: Part numbers beginning with “L” are RoHS compliant. Contact BH if you have need for RoHS construction. PACKAGE STYLE 1 2 3 4 5 6 7

A (inches) millimeters

B (inches) millimeters

C (inches) millimeters

D (inches) millimeters

E (inches) millimeters

F (inches) millimeters

G (inches) millimeters

(1.05) 26.67 (1.45) 36.83 (2.00) 50.80 (.755) 19.12 (1.45) 36.83 (2.00) 50.80 (2.16) 54.86

(0.55) 13.97 (.80) 20.32 (.95) 24.13 (.670) 17.02 (.80) 20.32 (.95) 24.13 (1.12) 28.45

(.400) 10.16 (.600) 15.24 (.700) 17.78 (000) 000 N/A N/A N/A N/A N/A N/A

(.800) 20.32 (.900) 22.86 (1.20) 30.48 (000) 000 (.900) 22.86 (1.20) 30.48 (1.50) 38.10

(.20) 5.08 (.20) 5.08 (.20) 5.08 (000) 000 (.25) 6.35 (.25) 6.35 (.25) 6.35

(1.10) 27.94 (1.40) 35.56 (1.90) 48.26 (.390) 9.91 (1.40) 15.56 (1.90) 48.26 (2.20) 55.88

N/A N/A N/A N/A N/A N/A N/A N/A 6/32 6/32 8/32 8/32 10/32 10/32

– 5, 6, 7 –

– 1, 2, 3 – 3

N/C

HIGH FREQUENCY POWER PRODUCTS

Power Inductors Toroid Inductors for Switching Power Supplies

–4– 1

NOTE A: Style 5, 6, and 7 leads cut to 6" - Custom length available upon request. PACKAGE 1-3 SIDE VIEW

PACKAGE 5-7 BOTTOM VIEW

SEE NOTE A

B MAX.

F MAX.

A MAX.

E MIN. G THREAD SIZE

SIDE VIEW

PACKAGE 4

B MAX.

F MAX. BH 501-XXXX XXXX

2 E MIN.

BOTTOM VIEW

BH 501-XXXX XXXX

SIDE VIEW

A MAX.

BOTTOM VIEW

END VIEW

12219 Wood Lake Drive, Burnsville MN 55337 • Phone 952.894.9590 • Fax 952.894.9380 • www.bhelectronics.com

HIGH FREQUENCY POWER PRODUCTS

Power and Control Magnetics Control Transformers

MOSFET/TRIAC/SCR Trigger Transformers • Ideal for use as trigger transformers in Mosfet, SCR and Triac circuits • High isolation voltages - Hi-pot tested to 2500 VAC • Fully encapsulated • Designed for fast rise time applications ELECTRICAL CHARACTERISTICS @ 25˚ C BH PART NUMBER

TURNS RATIO

PRIMARY INDUCTANCE (mH-MIN.)

PRIMARY ET-CONSTANT

LEAKAGE INDUCTANCE (µH)

Ciw (pf MAX.)

DCR PRI (Ω)

DCR SEC (Ω)

SCHEMATIC

L05-5500 505-5501 505-5502 505-5503 505-5504 505-5505 505-5506 505-5507 505-5508 505-5509 505-5510 L05-5511 505-5512 505-5513 505-5570 505-5571 505-5572 505-5573 505-5574 505-5575 505-5576 505-5577 505-5578 505-5579 505-5580 505-5581 505-5582 505-5583 505-5584 505-5585

1:1 1:1 1:1 1:1 1:1:1 1:1:1 1:1:1 1:1:1 2:1 2:1 2:1:1 2:1:1 5:1 5:1:1 1:1 1:1:1 1:1 1:1:1 1:1 1:1:1 1:1 1:1:1 2:1 2:1:1 2:1 2:1:1 2:1 2:1:1 5:1 5:1:1

.25 1.0 5.0 20.0 .25 1.0 5.0 20.0 1.0 5.0 1.0 5.0 20.0 20.0 .25 .25 1.0 1.0 5.0 5.0 20.0 20.0 1.0 1.0 5.0 5.0 20.0 20.0 20.0 20.0

45 90 180 360 45 90 180 360 90 180 90 180 360 360 45 45 90 90 180 180 360 360 90 90 180 180 360 360 360 360

5 20 45 200 5 20 45 200 40 60 40 60 200 200 5 5 20 20 45 45 200 75 40 60 40 45 200 200 200 200

20 30 30 50 20 30 30 50 30 30 30 30 50 50 20 20 30 30 30 30 50 50 30 30 30 30 75 75 50 50

1.0 2.0 3.0 5.0 1.0 2.0 3.0 5.0 2.0 3.0 2.0 3.0 5.0 5.0 1.0 1.0 2.0 2.0 3.0 3.0 6.0 3.0 2.0 2.0 3.0 3.0 5.0 3.0 5.0 5.0

1.0 2.0 3.0 5.0 1.0 2.0 3.0 5.0 1.0 2.0 1.0 2.0 2.0 2.0 1.0 1.0 2.0 2.0 3.0 3.0 6.0 3.0 1.0 1.0 2.0 2.0 3.0 2.0 2.0 2.0

N/A N/A N/A N/A 1.0 2.0 3.0 5.0 N/A N/A 1.0 2.0 N/A 2.0 N/A 1.0 N/A 2.0 N/A 3.0 N/A 3.0 N/A 1.0 N/A 2.0 N/A 2.0 N/A 2.0

2 2 2 2 1 1 1 1 2 2 1 1 2 1 3 4 3 4 3 4 3 4 3 4 3 4 3 4 3 4

0.600

Note: Part numbers beginning with “L” are RoHS compliant. 1

505-55XX BH XXXX

0.750 MAX.

0.800 MAX.

0.500

1 6

0.500 MIN. 0.900 MAX. TOP VIEW

–1–

– 2VIEW – SIDE

3 Pins 2 & 5 omitted

– 3 – BOTTOM VIEW

0.036 DIA.

0.300

–4– 1

PRI.

SEC.

Pins 2 & 5 omitted

12219 Wood Lake Drive, Burnsville MN 55337 • Phone 952.894.9590 • Fax 952.894.9380 • www.bhelectronics.com

Power and Control Magnetics Current Sense Transformers • Surface mount (SMT) for compact size or through-hole for heavy current • Isolation to 3000 VAC • Wide variety of applications from multiple chip vendors • 10 KHz to 500 KHz frequency of operation • Use Current Transformer Formula below to determine the BH part number that meets your requirements

ELECTRICAL CHARACTERISTICS @ 25˚ C BH PART NUMBER

TURNS RATIO

INDUCTANCE (mH-MIN.)

ET Volt-µSec RATING

DCR PRIMARY OHMS MAX

DCR SECONDARY OHMS MAX

PACKAGE STYLE

SCHEMATIC

MAX CURRENT RATING Arms

500-2603 500-2604 500-2605 500-2600 500-2601 500-2602 500-2456

1:50 1:100 1:200 1:50 1:100 1:200 1:200

1.40 6.0 22.0 2.15 8.75 35.0 87.0

55 110 220 65 135 300 1400

0.006 0.006 0.006 0.004 0.004 0.004 0.0015

0.75 2.4 7.65 0.38 1.2 4.00 4.0

1 1 1 2 2 2 3

1 1 1 1 1 1 2

6.0 6.0 6.0 8.0 8.0 8.0 10.0

Note: Part numbers beginning with “5” are not RoHS compliant. Contact BH if you have need for RoHS construction.

PACKAGE 1

PACKAGE 3

PACKAGE 2 0.910 MAX.

0.375 1

4 0.375

TOP VIEW

0.600 MAX. 0.400 MAX.

4 0.500 MAX. 3

SIDE VIEWS

1.15 MAX.

HIGH FREQUENCY POWER PRODUCTS

• Current sense for regulation of switch mode power supplies

0.500 MAX. 0.195

SIDE VIEW

SIDE 0.250 VIEW

4 0.150

0.300

SUGGESTED PAD LAYOUT

0.300

0.125

0.400

0.150 TYP. 0.032 DIA. NOM. 0.300

0.300

0.500

0.080

0.400

0.080 DIA.

CURRENT TRANSFORMER FORMULA –2–

–1–

4 3

1 N1

2 3

I secondary = I primary ÷ turns ratio E (volts) = Rt x I secondary (amps) T = 1/(2F) F = Frequency in Hz E x T must be less than ET Volt uSec Rating R termination selected by designer

12219 Wood Lake Drive, Burnsville MN 55337 • Phone 952.894.9590 • Fax 952.894.9380 • www.bhelectronics.com

Signal Control Components

Magnetics for Telecommunications & Data Network Circuits Common Mode Chokes • For the rejection of RFI and EMI on unshielded twisted pair (UTP) lines • 1000 VDC isolation • Custom designs in a wide variety of packages

ELECTRICAL CHARACTERISTICS @ 25˚ C BH PART NUMBER

TURNS RATIO

REFERENCE INDUCTANCE @ 100 KHz

CI MAX. ANY WINDING

DCR MAX

SCHEMATIC

PACKAGE STYLE

L00-1164 500-1165 500-1179 500-1266 500-1267 500-1291 500-1299 500-1433 500-1517 500-1532 500-1841 500-1910 500-2063 501-0752

1:1 1:1:1:1 1:1:1:1 1:1 1:1 1:1 1:1 1:1 1:1:1:1 1:1:1:1 1:1:1:1 1:1 1:1 1:1

33 H 27 H 53 H 15mH 125 H 53 H 750 H 750 H 50 H 12 H 8H 85 H 64 H 12mH

20pF 30pF 30pF 260pF 150pF 30pF 15pF 15pF 20pF 10pF 10pF 10pF 30pF 350pF

0.05 0.05 0.1 2.0 0.5 0.1 0.3 0.3 0.15 0.1 0.20 0.08 0.2 14.0

4 1 1 4 4 4 3 3 1 1 1 4 2 2

4 1 1 1 1 1 2 2 1 1 3 4 5 6

DIM “A”

DIM “B”

0.450 0.590 0.580 0.580 0.590

0.350 0.500 0.500 0.500 0.550

0.420 0.450

0.350 0.360

Note: Part numbers beginning with “L” are RoHS compliant.

PACKAGE 1

PACKAGE 2

PACKAGE 3

PACKAGE 4

PIN ONE DOT BH 500-XXXX XXXX

"A"

500- 1841 BH XXXX

TOP VIEW

0.42

SIDE VIEW

"B"

0.025 MIN.

SIDE VIEW

0.40 MAX.

0.135

0.350

SIDE VIEW

0.255 MAX.

0.300

0.025 X 0.010

0.125

0.020 DIA. (4X)

SUGGESTED PAD LAYOUT 4

6 0.100 (6X)

BOTTOM VIEW

0.025" X 0.10"

0.425 5

0.020 DIA. 4

0.100 (6X) 0.300

SIDE VIEW

0.135

0.255 MAX.

0.500 MAX. 0.020

0.425

TOP VIEW

0.450

0.50 MAX.

0.300

BOTTOM VIEW

0.400 BOTTOM VIEW

0.300

0.050 DIA. TYP.

PACKAGE 5 TOP VIEW

0.500 MAX.

–1–

0.500 MAX. SIDE VIEW

1 2 3 4

–3–

–2– 1

0.250

SUGGESTED PAD LAYOUT

–4–

0.400

8 7 6 5 0.080

0.400

12219 Wood Lake Drive, Burnsville MN 55337 • Phone 952.894.9590 • Fax 952.894.9380 • www.bhelectronics.com 0.020 SEATING PLANE

Magnetics for Telecommunications & Data Network Circuits Impedance Matching and Isolation Transformers • Ideal for use as baluns or as isolation transformers • Use in popular networks such as Ethernet or 10 Base T and 100 Base T • Use in proprietary networks based on RS232, RS422 or RS485 • Products are available to support data rates from 9.6Kb/sec. to 250Mb/sec. ELECTRICAL CHARACTERISTICS @ 25˚ C BH PART NUMBER

ET CONSTANT (V SEC. MIN.)

TURNS RATIO

PRIMARY INDUCTANCE

ISOLATION VOLTAGE

SCHEMATIC

PACKAGE STYLE

DIM. “A” MAX.

500-1430

1:1:27

L00-1455

100

1:1

500-1461

1200

500-1463

000

500-1465

DIM. “B” MAX.

2.8mH

500 VDC

.37

.32

21mH

1500 VRMS

0.4

0.35

1:1

800mH

2200 VRMS

0.57

0.4

1:1

140uH

1200 VAC

0.54

0.31

380

1CT: 1CT

193mH

1500 VRMS

0.45

0.43

500-1438

1CT: 1CT

150 H

500 VDC

N/A

500-1542

900

1CT: 1CT

430MH

2900VDC

0.56

0.39

500-1544

1: 1CT

2.2mH

1000 VRMS

0.60

0.35

500-2279*

1.5

1: 1 TAPPED

100 uH

2500 VAC

N/A

500-2387*

1:1.22 TAPPED

1.0mH

1500 VAC

N/A

Note: Part numbers beginning with “L” are RoHS compliant. * Specifications here have been updated, click on the part number to view detailed specification drawing. –1– 1

–2– 8

–5– 6

–8–

–7– 1

6 5

5 100 Ω

–4–

–6–

–3–

100 Ω

120 Ω

75 Ω 100 Ω

75 Ω 3

Signal Control Components

• Designed for use in line matching and isolation circuits

12219 Wood Lake Drive, Burnsville MN 55337 • Phone 952.894.9590 • Fax 952.894.9380 • www.bhelectronics.com

Signal Control Components

Magnetics for Telecommunications & Data Network Circuits Impedance Matching and Isolation Transformers (continued) PACKAGE 1

TOP VIEW

PACKAGE 2

PACKAGE 3

TOP VIEW

"A"

TOP VIEW

0.30 MAX.

0.505 MAX.

0.385 MAX. SIDE VIEW

SIDE VIEW

"B" SIDE VIEW

0.175 MAX. 0.150 MIN.

0.120 0.300

0.15 0.300

BOTTOM VIEW

0.370 MAX.

0.225 MAX.

0.300

BOTTOM VIEW

0.100 (6X)

PACKAGE 4

BOTTOM VIEW

0.020 DIA.

5 6

PACKAGE 5

PIN 1 DOT TOP VIEW

0.100

PACKAGE 6

0.362 MAX.

TOP VIEW

0.54 DIA. REF. A

0.250 MAX.

0.012

0.310 REF. B

SIDE VIEW

0.335 MAX.

0.012

0.012 X 0.028 (6X)

0.425

0.362 MAX.

0.270 MAX.

0.280 MAX.

SIDE VIEW

+0.0000 -0.0000

0.100 (4X)

0.025+0.005

0.025 DIA.

+0.0000 -0.0000

0.024 X 0.012

0.012 X 0.028 (6X)

0.425 SUGGESTED PAD LAYOUT

0.175 MAX. 0.150 MIN. C

0.30 4 3 2 1

SUGGESTED PAD LAYOUT

0.024 X 0.012

0.375

5 0.100 (6X) 6 7 8

0.100 0.050

+0.0000 -0.0000

0.100

+0.0000 -0.0000

0.100

PACKAGE 7 TOP VIEW

SIDE VIEW

BOTTOM VIEW

3 "A"

0.025

"B"

4 0.100 x 2

0.200 1

0.175 MAX 0.150 MIN

0.425

12219 Wood Lake Drive, Burnsville MN 55337 • Phone 952.894.9590 • Fax 952.894.9380 • www.bhelectronics.com

Baseband Video Components • Wide band transformers and chokes support NTSC, PAL & SECAM based video including 60 Hz synchronization frequency • Several impedances matched • Reference bhelectronics.com for detailed application notes and drawings ELECTRICAL CHARACTERISTICS @ 25˚ C BH PART NUMBER

IMPEDANCE

APPLICATION

L10-0009 501-1209

75Ω to 100Ω 75Ω to 100Ω 75Ω to 100Ω 75Ω to 150Ω 75Ω to 75Ω

Composite Video S-Video, Component Video Composite Video Isolation Transformer Composite Video Isolation Transformer Composite Video Isolation Transformer

500-2547 500-2957

Note: Part numbers beginning with “L” are RoHS compliant. SCHEMATICS

Impedance vs Frequency L10-0009 QTR-PakTM Common Mode Choke / Balun 20,000

L10-0009

18,409

18,000

16,229

Impedance (Ohms)

16,000 14,000

12,576

Video Components

• Custom versions available

12,000

501-1209

10,000 6,770

8,000 6,000

5,834

3,864

2,844

4,000 2,000

1,791

875 0 0.01

0.05

0.1

0.5

1.0 Frequency (MHz)

1.8

For greater detail see web site

500-2547

MECHANICALS 3

L10-0009

501-1209

500-2957

PIN 1 MARKING

L10-0009

0.810 REF.

0.500 MAX. A

0.980 MAX.

5 0.820 REF.

0.500 MAX. B

0.500 MAX.

0.525 MAX.

7 9

0.250 MAX. C

0.530 REF.

SEATING PLANE 0.020 0.400

12 4

0.200 TYP. 0.047 NOM.

0.700 0.069 (4X)

0.020 DIA. (16X) 1

4 COPLANARITY 0.004”

9 0.100 TYP.

0.394 (4X)

500-2957

0.023 DIA. (4X)

12219 Wood Lake Drive, Burnsville MN 55337 • Phone 952.894.9590 • Fax 952.894.9380 • www.bhelectronics.com

Test Baluns

Test Baluns Network Test Baluns Patent #6,100,772 others pending

• Replaceable test sockets

• Convert 50Ω unbalanced to 100Ω balanced signals from 1 KHz to 650 MHz

• Dual SMA connectors

• Designed for use in testing network cable connectors and wiring systems

• Termination Resistors available – 100Ω (BH Part #040-0111) and Y (BH Part #040-0112)

• Rugged brass case construction

• Gold plated connectors

ELECTRICAL CHARACTERISTICS @ 25˚ C BH PART NUMBER 040-0093 040-0071 040-0096 040-0092

040-0192 040-0111 040-0112

FREQUENCY RANGE

RETURN LOSS BI-DIRECTIONAL

INSERTION LOSS

1MHz to 350 MHz 1.2dB max 16dB min (1 MHz - 3 MHz) 1MHz to 350 MHz 1.2dB max 20dB min (3 MHz - 350 MHz) 100 KHz to 100 MHz 1.2dB max 20dB min (100 KHz - 50 MHz) 100 KHz to 100 MHz 1.2dB max 15dB min (50 MHz - 100 MHz) 1 MHz to 600 MHz 1.2dB max 17.5dB min (1 MHz - 3MHz) 1 MHz to 600 Mhz 1.2dB max 20dB min (3 MHz - 600 MHz) 1 MHz to 650 MHz 1.2dB max (15 MHz - 250 MHz) 12dB min (1 MHz - 15 MHz) 1 MHz to 650 MHz 1.8dB max (1 MHz - 15 MHz) 20dB min (15 MHz - 550 MHz) 1 MHz to 650 MHz 1.4dB max (250 MHz - 350 MHz) 17.5dB min (550 MHz - 650 MHz) 1 MHz to 650 MHz 1.8dB max (350 MHz - 650 MHz) 1 MHz to 650 MHz 3.6dB max (1 MHz - 15 MHz) 12dB min (1 MHz - 15 MHz) 100 Termination Resistor Y Termination Resistor

RETURN LOSS COMMON MODE

LONGITUDINAL BALANCE

20dB (1 MHz - 350 MHz) 20dB (1 MHz - 350 MHz) 20dB min (100 KHz - 100 MHz) 20dB min (100 KHz - 100 MHz) *

50dB ( 100-350 MHz) 60dB ( 1-100 MHz) 60dB min (100 KHz - 50 MHz) 50dB min (50 MHz - 100 MHz) *

15dB min (1 Mhz - 15 Mhz) 15dB min (400 Mhz - 650 Mhz)

60dB min (1 MHz - 350 MHz)

15dB min (1 MHz - 15 MHz)

60dB min (1MHz - 350 MHz)

* No center tap port. For additional information check engineering print.

DSL Test Baluns Patents pending • Specially tuned and balanced for DSL circuits • <ldB insertion loss • Seven impedance ranges available • Through-hole mounting option available • Common mode rejection 50dB min (200 Hz to 1.2 MHz) ELECTRICAL CHARACTERISTICS @ 25˚ C BH PART NUMBER

IMPEDANCE

INSERTION LOSS

RETURN LOSS BI-DIRECTIONAL

040-0080

50:600 50:600 50:600 50:125 50:125 75:600 75:600 50:900 50:900 50:900 50:135 50:135 50:85 50:85 50:100 50:100 50:100 50:100 50:100

1dB max (200 Hz - 1.2 MHz) 1dB max (200 Hz - 1.2 MHz) 1dB max (200 Hz - 1.2 MHz) 1dB max (200 Hz - 1.2 MHz) 1dB max (200 Hz - 1.2 MHz) 1dB max (200 Hz - 1.2 MHz) 1dB max (200 Hz - 1.2 MHz) 1dB max (200 Hz - 1.0 MHz) 1dB max (200 Hz - 1.0 MHz) 1dB max (200 Hz - 1.0 MHz) 1dB max (200 Hz - 1.2 MHz) 1dB max (200 Hz - 1.2 MHz) 1dB max (200 Hz - 1.2 MHz) 1dB max (200 Hz - 1.2 MHz) 1dB max (200 Hz - 1.2 MHz) 1dB max (200 Hz - 1.2 MHz) 1dB max (200 Hz - 1.2 MHz) 1dB max (200 Hz - 1.2 MHz) .75 dB max (25 KHz - 30 MHz)

17.5 dB min (200 Hz - 500Hz) 20 dB min (500 Hz - 1.0 MHz) 17.5 dB min (1.0 MHz - 1.2 MHz) 17.5 dB min (200 Hz - 500 Hz) 20 dB min (500 Hz - 1.2 MHz) 17.5 dB min (200 Hz - 500 Hz) 20 dB min (500 Hz - 1.0 MHz) 17.5 dB min (200Hz - 500 Hz) 20 dB min (500 Hz - 750 KHz) 17.5 dB min (750 KHz - 1.0 MHz) 17.5 dB min (200Hz - 500 Hz) 20dB min (500 Hz - 1.2 MHz) 17.5 dB min (200 Hz - 500 Hz) 20 dB min (500 Hz - 1.2 MHz) 17.5 Hz min (200 Hz - 500 Hz) 20 dB min (500 Hz - 1.2 MHz) 17.5 dB (200 Hz - 500 Hz) 20 dB min (500 Hz - 1.2 MHz) 20 dB min (25 KHz - 30 MHz)

040-0081 040-0082 040-0083

040-0084 040-0085 040-0088 040-0095 Through-Hole 040-0097

Test set ups, mechanicals and schematics are available upon request or at www. bhelectronics.com.

12219 Wood Lake Drive, Burnsville MN 55337 • Phone 952.894.9590 • Fax 952.894.9380 • www.bhelectronics.com

Magnetic Assemblies

In addition to coil winding and magnetics fabrication, our manufactuing capabilities include injection molding, metal fabrication, surface mount assembly and automated testing of final products. Call BH Electronics sales or engineering offices for more information and to discuss your applications without obligation.

12219 Wood Lake Drive, Burnsville MN 55337 • Phone 952.894.9590 • Fax 952.894.9380 • www.bhelectronics.com

5 MAGNETIC ASSEMBLIES

BH Electronics excels in the design and manufacture of complex electronic devices based on magnetic technology. With manufacturing in the US, Mexico and China products can be created to meet any production volume requirements. Products range from basic PC board solutions to complete private label devices in retail packaging. Applications include conductivity sensors, variable resistors, video baluns, RF filters, ADSL & VDSL band-pass filters, power line filters and RF power splitters. Industries served include telecommunications, military electronics, medical electronics and industrial controls.

HIGH CURRENT EXTREME INDUCTORS

Extreme Magnetics High Current Power Inductors • Ruggedized COTS Inductors • High Current and High Inductance for SMT Applications • -40 to 125C operating temperature • Fully Potted • Electrical Specifications @ 25C 0.508 0.118 3X 0.157

0.508 0.256

0.323

Drawings shown without encapsulation for clarity.

0.118 3X ELECTRICAL CHARACTERISTICS @ 25˚ C BH PART NUMBER

INDUCTANCE (µH)

DC RESISTANCE MAXIMUM (Ω)

Maximum I Peak (A)

501-2020 501-2021 501-2022 501-2023 501-2024 501-2025 501-2026 501-2027 501-2028

1.0 1.8 2.8 4.0 0.3 0.8 1.4 2.2 3.2

0.0025 0.0034 0.0054 0.0080 0.0018 0.0025 0.0034 0.0054 0.0080

20.0 15.3 12.3 10.3 35.0 27.2 20.8 14.8 12.8

Power Magnetics Extreme Magnetics Magnetic components designed for use at extreme temperatures and in high vibration applications for use in demanding industrial, military and deep well driling applications. Most are fully encapsulated and all are rated for use at temperatures between -40˚C and +125˚C. Custom versions are available upon request. Contact your local BH Electronics representative. The following devices are shown to illustrate BH Electronic's range of capabilities for magnetics that must operate in extreme environments. Contact BH with your specific design requirements. ELECTRICAL CHARACTERISTICS @ 25˚ C BH PART NUMBER

TURNS RATIO

DEVICE TYPE

PRIMARY INDUCTANCE

DCR OHMS

MAXIMUM CURRENT ADC

SCHEMATIC

FOOTPRINT

MIL-STD202*

500-2506 500-2746 501-0911 501-0912 501-0913 501-0977

1:1:1 1:1 N/A N/A N/A N/A

Pulse Transformer Gate Drive Transformer Inductor Inductor Inductor Inductor

1mH 1.25mH 360nH 840uH 3.0uH .45uH

2.5 0.360 0.015 0.022 0.105 0.003

N/A N/A 2.0 1.0 0.5 8.1

1 2 3 3 3 4

X X X X X X

* Thermal Shock: MIL-STD-202, Method 107 but with a max. temp of 125˚C. * Operating temperature range: -46˚C to +125˚C. For mechanical details on these parts contact BH Electronics.

12219 Wood Lake Drive, Burnsville MN 55337 • Phone 952.894.9590 • Fax 952.894.9380 • www.bhelectronics.com

Power Magnetics Extreme Magnetics (continued)

TOP 2

TOP VIEW

0.300 REF. B

0.225 MAX. C D 0.225 MAX.

LARGE WHITE PIN 1 MARKING

0.375 MAX. A

A 0.150 MAX.

0.175 (2X) 1

0.250

4 0.100 (4X) D 5 6

2 0.075 (2X) D

BOTTOM VIEW

0.125 B 5

.004 FOUR SURFACES

0.040 (4X) F

.280 MAX. C

COPLANARITY 0.004

0.125

0.250 E

BOTTOM 2

BROWN PIN 1 MARKING

.004 6SURFACES

0.050

2 3

0.500 MAX. D

0.15

COLOR CODE LOCATION (NOTE 7 AND 8)

0.035+0.010

501-0911 MECHANICAL500-2746 SCHEMATIC 500-2506 SCHEMATIC

500-2746 MECHANICAL

3 0.235 MAX. B

BOTTOM VIEW

501-0913 MECHANICAL

501-0912 MECHANICAL

L00-1164 MECHANICAL 501-0912 SCHEMATIC

501-0913 SCHEMATIC 1 4

1 4

0.450 MAX. A

2 3 RED PIN 1 MARKING

.280 MAX. C

0.175 (2X) 1

0.075 (2X) D

5 4

0.300 REF. B

LARGE WHITE PIN 1 MARKING 0.480 MAX. C

.003 BROWN .004PIN 1 MARKING 0.029 DIA. 6SURFACES

0.225 MAX. C

.280 MAX. C N1

0.405 MAX. N3 A 0.175 (2X)

.004 FOUR SURFACES 0.040 0.235 MAX. B 1 (4X) F BOTTOM VIEW

0.200 0.150 2

2 3

501-0911 SCHEMATIC 3

4 .004 5FOUR SURFACES

0.040 F

501-0977 (4X) BH XXXX

1 4

501-0977 MECHANICAL

0.375 MAX. A

501-0913 SCHEMATIC

4 4

2 3

COPLANARITY DETAIL E 0.004 0.125 -A.280 1 6 2 MAX. C 0.405 501-09120.200 MECHANICAL 0.250 A 0.150 MAX. 0.075 (2X) D 0.150 1 2 MAX. B 4 .004 3 4 2 BOTTOM 0.100 (4X) D1 FOUR SURFACES 0.125 B 0.040 VIEW 0.300 5 (4X) F 0.235 MAX. B 0.480 6 3 5 4 3 0.030 4 A 0.175 BOTTOM VIEW MAX. C 0.150 Min. (2X) REDMAX. PIN 1 E MARKING 1 2 .003 .280 MN 55337 • Phone 952.894.9590 • Fax 952.894.9380 12219 Wood Lake Drive, Burnsville DETAIL -A0.029 DIA. MAX. C D 0.075 (2X)

0.15 0.250 E

0.405 TOP A MAX. VIEW

D ORANGE 0.405 0.225 MAX. PIN 1 MAX. COLOR CODE LOCATION 501-0911 MECHANICAL MARKING (NOTE 7 AND 8) B

0.500 MAX. 0.030D Min.

MECHANICAL500-2506 SCHEMATIC501-0977 SCHEMATIC 500-2746 SCHEMATIC 1

501-0977 BH XXXX

4 0.300 F

BOTTOM VIEW

501-0913 501-0977 MECHANICAL500-2746 MECHANICAL

0.025 X 0.010 D (4X)

0.235 MAX. B

BOTTOM VIEW

A 0.300 REF.

E 0.425+0.025

0.235 MAX. B

506 MECHANICAL

0.350 MAX. B C 0.150 MAX. 0.125 MIN.

A 0.150 MAX.

0.075 (2X) D 4

.004 FOUR SURFACES

0.040 (4X) F

0.175 (2X) 1

2 3

.280 MAX. C

.004 FOUR SURFACES

0.040 (4X) F A 0.150 MAX.

ORANGE PIN 1 MARKING

EXTREME MAGNETICS

500-2506 MECHANICAL PIN 1 DOT A 0.300 REF. 6 1

1 4

501-0977 SCHEMATIC 1

2 3 4 2

501-0912 SCHEMATIC 1 4

2 3

• www.bhelectronics.com

APPENDIX

Application Notes The following pages contain information which will help you define, specify and select the right magnetic component transformer, inductor, filter - for your application. It includes definitions, a product selection guide and measurement and specifications parameters. Further information and assistance can be obtained by contacting BH Electronics' application engineering to discuss your specific needs in detail. For a written response use the Request for Quotation forms on pages 27 and 28.

Product Selection Choosing the transformer

Finding the right transformer for any particular application doesn't need to be a matter of trial and error. Using basic application concepts can reduce the field of options to a few likely items. The main thing to keep in mind is that the transformer should be chosen based upon its published parameters without regard to its original design application. Often a part described as a network isolation transformer, for example, can be used in an unrelated application such as a MOSFET driver circuit. The first step is to determine the isolation voltage and turns ratio of the transformer required. Isolation voltage is published as hi-pot test voltage. This is a short term high voltage test. If a continuous winding-to-winding or winding-to-core isolation over 600 volts RMS is required we suggest contacting BH engineering for assistance. Transformer size is determined by the ET constant. This is the maximum amount of energy over time that will pass through the transformer without saturating the core. It is sometimes called the "volt-microsecond product" or volt-microsecond constant. It is the product of the pulse amplitude in volts, multiplied by the duration of the longest expected pulse width in microseconds. The following examples illustrate this concept: t

The next step is to characterize the shape of the waveform as it passes through the transformer. The result of this process is a compromise between three different transformer parameters. The leading edge of the pulse, the top of the pulse and the trailing edge of the pulse each require different performance characteristics. The rising pulse is controlled mainly by leakage inductance (LL) of the component. Higher leakage inductance indicates slower rise time. Distributed capacitance and resistance also affect rise time in some circuits, but for purposes of selecting a small range of products from a catalog, we suggest using the leakage inductance specifications. The top of the pulse is effected primarily by the open circuit inductance (OCL) of the transformer. Higher OCL values will result in less droop. The slope of the trailing edge of the pulse is effected by the total capacitance as seen by the primary. Lower load capacitance will result in shorter pulse decay times. Backswing is a function of the magnetizing current. Larger and/or less efficient transformers will have more backswing. To limit backswing and internal capacitance it is suggested that the designer avoid transformers substantially larger than the application requires.

v EXAMPLE 1

v EXAMPLE 2

EXAMPLE 4

EXAMPLE 3

Figure 1

Measurement dynamic parameter measurement

All of the dynamic parameters of a pulse transformer can be measured using the circuit shown in Figure 2.

PULSE TRANSFORMER R2 R1

RL is

The pulse generator should have rise and fall times PULSE CURRENT GENERA TOR PROBE less than 2 nanosecs. RL should be selected at the load ip impedance into which the transformer will work in actual operation. R1 and R2 should be selected so that the pulse generator sees an impedance approximately equal to its internal impedance and so that the OSCILLOSCOPE transformer input sees an impedance equal to RL times the turns ratio squared. The oscilloscope should have at least a 50 MHz capability. Figure 2. Pulse transformer dynamic parameter measurement circuit.

12219 Wood Lake Drive, Burnsville MN 55337 • Phone 952.894.9590 • Fax 952.894.9380 • www.bhelectronics.com

Application Notes The pulse duration and pulse amplitude can be measured by opening the primary current lead to the current probe and reconnecting it so that the primary current does not flow through the current probe. The voltage applied to the primary can be measured by placing an oscilloscope voltage probe across the transformer primary. If the pulse duration is gradually

PRIMARY CURRENT

DIFFERENCE CURRENT

6 APPENDIX

The operation of the circuit of Figure 2 depends upon the balancing of the opposing primary and secondary currents flowing through the current probe. For 1:1 turns ratio transformers, this is accomplished automatically. For transformer turns ratios other than 1:1, it is necessary to wind the same ratio of turns on the current probe as the transformer ratio in order to have the primary current balanced by the secondary current.

Figure 5. Difference current waveform showing transformer turns ratio error.

SECONDARY CURRENT MIRROR IMAGE OF PRIMARY CURRENT

Figure 3. Primary and secondary current waveforms as seen by the current probe in the circuit of Figure 2. When the primary and secondary ampere-turns are balanced, the two currents have the shape shown in Figure 3. For comparison purposes, the mirror image of the primary current is shown in dashed lines. Also shown as a dotted line in Figure 3 is the difference current between the primary and secondary currents. This difference current waveform appears on the oscilloscope face. This difference current waveform is redrawn in Figure 4 with the dynamic parameters of the transformer noted. The derivation of the parameters indicated can be seen by studying Figure 3 and remembering that these dynamic parameters are a measure of how much the transformer degrades a pulse. If the pulse were not changed by the transformer, the output pulse would be the same as the input pulse and the difference current waveform would be a straight horizontal line. If the polarity of the windings is incorrect, the primary and secondary currents will add instead of cancel each other DROOP CURRENT AMPLITUDE I

BACKSWING CURRENT AMPLITUDE

increased, the core will eventually saturate. At saturation, the output voltage decreases and the droop characteristic as measured by the circuit of Figure 2 looks like that shown in Figure 6. The transformer volt-microsecond product is the voltage applied multiplied by the time to saturate as shown in Figure 6.

Dynamic parameters

TIME TO SATURATE

Figure 6. Difference current waveform when core is saturated. When a pulse transformer is inserted into a circuit, the transformer degrades any pulse which passes through it. The dynamic parameters of a pulse transformer are defined by the ways in which a "perfect" pulse is degraded. For example, the rise time of a pulse transformer is defined as the rise time of an output pulse when a zero rise time pulse is applied to the input. With this concept in mind, refer to Figure 7 which is the typical output pulse of a pulse transformer when a perfect no rise or fall time, flat top, no over or undershoot pulse is applied to the input.

OVERSHOOT Tr

Tf OVERSHOOT CURRENT AMPLITUDE

Figure 4. Difference current waveform.

.5A

.1A

producing a very high amplitude pulse. If the turns ratio is not exactly correct, the waveform will be the same as that of Figure 4 except offset as shown in Figure 5 because the currents will not perfectly balance.

DROOP

A .9A

BACKSWING

Tr T

Figure 7. Pulse transformer dynamic parameters. 12219 Wood Lake Drive, Burnsville MN 55337 • Phone 952.894.9590 • Fax 952.894.9380 • www.bhelectronics.com

APPENDIX

Application Notes open circuit inductance

Open circuit inductance of a winding is measured across the winding with all other windings open circuited. The measurement must be made with a drive low enough to keep the core in the initial permeability region and at a frequency one tenth or less than the coil self resonant frequency. Check to see that the drive is not too high by varying drive level. If the LOC reading varies with drive level the drive is too high. A measurement frequency below 150 KHz is usually satisfactory.

amount of voltage for a long time. If only unidirectional pulses are applied, the flux density can only move between the saturation level and the residual level and the device will support a relatively small volt-microsecond product.

leakage inductance

Leakage inductance is measured most easily with a HP 4192A meter connected across the winding to be measured with another winding short-circuited with as short a path as possible.

COUPLING CAPACITance

Suitable instruments for measuring open circuit inductance are following: Tektronix, Model 130 LC meter; HewlettPackard 4192A impedance analyzer; ESI, Model 250-DA impedance bridge; Wayne – Kerr.

Coupling capacitance is read easily with a HP 4192A meter connected between the two windings of interest with both windings short-circuited. Use short leads to avoid errors in measurement due to capacitance between leads.

exciting current

Distributed CAPACITance

A certain amount of coercive force is required before a flux change is generated in a core. This amount of coercive force is called excitation. For a given number of turns on a core, a certain current is required to produce the excitation. This current is called exciting current and is represented by the symbol/ex . This exciting current must be satisfied before the transformer can do any work so that no output is obtained until more than the exciting current is supplied to the primary.

volt-microsecond product

The flux density level in a transformer core is directly proportional to the product of the voltage applied to a winding and the time that this voltage is applied. When the flux density reaches the saturation level, the inductance decreases rapidly to a low value. If pulses of opposite polarity are alternately applied to a transformer, the flux density can swing from the positive saturation level to the negative saturation level and the device will support a relatively large

Distributed capacitance is measured with a Hewlett-Packard 4192A. The Q is low at the self resonant frequency in some transformers making this measurement difficult or impossible to perform. A Network Analyzer may also be used to make this measurement.

winding resistance

Winding resistance is measured with a resistance bridge such as the Fluke 88424A. Care should be taken to avoid reading errors caused by heating of the wire of the winding during the measurement.

natural resonant frequency

Natural resonant frequency can be measured with the Hewlett-Packard 4192A but the same difficulties previously mentioned may be encountered.

insulation resistance The insulation resistance between windings is measured with a dc megohmeter.

Specification Be cautious when specifying materials or construction methods to prevent:

actual circuit performance and since they can be measured accurately and quickly.

• unnecessary engineering time to perform the design effort without the aid of special pulse transformer measuring equipment

Normally it is not adequate to only specify dynamic parameters as factors such as average current rating, insulation resistance and coupling capacity are also important.

• making the buyer rather than the seller responsible for transformer performance, and • higher cost for the transformers. BH engineers are current with all of the latest advances to increase performance at lower cost and in smaller packages. A specification which attempts to tie down a transformer's performance in two different ways is redundant. For example, if rise time is specified, leakage inductance and distributed capacity normally need not be. If droop is specified, open circuit inductance need not be. A redundant specification frequently leads to nuisance rejections during receiving inspection because the transformer satisfies a given requirement in one way but not in another way specified. In most instances, it is probably best to specify the requirements for a pulse transformer primarily in terms of its dynamic parameters since these parameters control

Where possible, always specify minimum or maximum values for parameters instead of a range as this may reduce cost by eliminating operations from the manufacturing process. Always specify the measurement circuit, method and equipment to be used to minimize any correlation difficulties. BH Electronics will provide correlation samples with readings for checking purposes. Consider the application for the transformer before deciding which parameters to specify. Avoid requiring parameters that are unnecessary for the application. For example, in applications such as common mode chokes and interstage transformers, the required volt-microsecond product is normally so small that the value need not be specified.

12219 Wood Lake Drive, Burnsville MN 55337 • Phone 952.894.9590 • Fax 952.894.9380 • www.bhelectronics.com

Innovative Minds...Exceptional Quality

BHC-08