Wireless Charger Modules Fit Within Thin and Compact Devices
ROHM Semiconductor has developed compact wireless charger modules with an integrated antenna board: the BP3621 (transmitter) and the BP3622 (receiver). These new modules allow designers to add wireless power-supply functionality to smaller devices such as smart tags/cards or PC peripherals.
These 13.56-MHz wireless charging modules allow users to easily add wireless power functionality to thin and compact devices. Measuring just 20 mm2 to 30 mm2 each, the BP3621 (transmitter) and BP3622 (receiver) incorporate an optimized antenna (coil) layout, which enables configuration of a compact wireless charging system using the 13.56-MHz frequency band to deliver up to 200 mW. Using the transmitter and receiver modules as a pair can significantly reduce the development load for prototyping, adjustment, evaluation, and other processes necessary to achieve high efficiency wireless charging. At the same time, the built-in antenna supports bi-directional data communication and NFC Forum Type 3 Tag operation, expanding applicability.
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