TE S T & ME ASUREMENT HANDBOOK
What’s new in USB Power Delivery 3.0? A new version of the USB spec puts additional demands on testing regimes that wring out power-handling options.
DAVID MALINIAK | TELEDYNE LECROY
Source Sink
Since its official debut in 1996, the Universal Serial Bus (USB) protocol has seen numerous revisions spanning three generations of the standard, with USB 4.0 waiting in the wings for later in 2019. Meanwhile, in parallel, the USB Implementer’s Forum (USB-IF), which oversees the USB standard, has maintained parallel development tracks for USB interconnects and USB Power Delivery (USB PD) technology.
28
DESIGN WORLD — EE NETWORK
LeCroy — Test and Measurement HB 06-19.indd 28
The USB Type-C interconnect (2014) brought a smaller, slimmer plug that’s reversible, eliminating the fumbling around to properly align the plug with the jack. USB Type-C also delivered higher data transfer rates and higher charging voltages/currents. When USB 3.1 arrived, so did USB PD 2.0. Now, USB 3.2 has been released as has PD 3.0. It is useful to review some of the changes from PD 2.0 to the current 3.0 revision of the standard as well as elements of PD compliance testing.
6 • 2019
A representative USB PD 3.0 compliance test setup featuring Teledyne LeCroy’s Voyager M310P test platform. This setup handles the test suites for both PD 2.0 and PD 3.0. The platform, which has native Type-C ports, can test both sources and sinks.
eeworldonline.com | designworldonline.com
6/7/19 1:36 PM
