Receiver Chip Implements Efficient, Flexible Wireless Charging For Wearables

Focus:

In portable gadgets, the wireless power receiver must use minimal space while operating on a single charge for a long time. Accordingly, the receiver must be small, efficient, and compliant with multiple standards. This article discusses the challenges of designing an inductive charging wireless power receiver and introduces an innovative wireless charging solution based on the MAX77950 wireless power receiver IC. This chip has features such as an active bridge rectifier and finer sampling of rectified voltage and load current, which receiver improve efficiency; accommodates both WPC and PMA protocols; and enables wireless power transfer to a peer device.

What you’ll learn:

• How to improve efficiency of WPC and PMA-compatible wireless power receivers
• How to build a small, efficient wireless power receiver based on inductive charging

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Author & Publication:

Scott Kim, Nazzareno (Reno) Rossetti, Raymond Park, Maxim Integrated, San Jose, Calif., How2Power Today, Aug 15 2017

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