Pushbutton should include long-life switches protected from the external environment. Designers have several options for switching styles. Protecting USB interfaces from ESD requires TVS diodes as recommended for the health monitor touchscreen circuit. Use two diode TVS in an anode-to-anode connection for bi-directional protection on the USB data lines. Some TVS diodes have an ultra-small 01005 flipchip package. The main power for the hearing aid comes from the USB Type-C port, which provides the battery charging current. A simplified alternative for the protection of the USB interface is a PPTC resettable fuse, which equips the hearing aid with overcurrent protection. While a PPTC fuse only provides overcurrent protection, it has the benefit of consuming a small amount of pcb space and minimal battery power. Versions of PPTC resettable fuses come in 0402 surface mount enclosures and can have resistances in
Smart health wearable monitor only delivers benefits if it functions reliably.
the single-digit milliohm range. Wearable medical devices only provide their benefits if they function reliably. Only a few components are required to help ensure a robust product. With the benefits of the unique components and assistance from the
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component manufacturers, designers can achieve their objective of developing an efficient, protected, wearable medical device. The result is a more robust and reliable product for the customers.
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