The MAX77950 is a versatile wireless power receiver. Free Technical Library News

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MAX77950 Universal Wireless Power Receiver

29.09.2018

Maxim Integrated has announced a new chip MAX77950, which is designed to create a receiver in a wireless power transmission system. The MAX77950 is fully compliant with WPC Low Power (v1.2) and PMA SR1 (v2.0) wireless charger standards, meaning it can perform Frequency Shift Keying (FSK) of received packets in accordance with these standards.

This solution is designed to implement the inductive method of receiving energy and provides up to 12 W of output power. The MAX77950 features accurate output current setting and voltage sensing circuitry across the entire load range.

A distinctive feature of this solution is that thanks to the patented PeerPower function, the MAX77950 chip can work as a power transmitter device. At the same time, communication between microcircuits takes place using in-band amplitude modulation (ASK - Amplitude Shift Keying). The programming of the microcircuit is carried out using the I2C serial interface. Setting, power transmission status and all kinds of errors are read through this interface.

The MAX77950EVKIT evaluation board is available for order. From two debug boards, you can create a system of receiver and transmitter devices. You can run and test the development board using the GUI.

Technical features of MAX77950:

compliance with the two most common standards in the world for wireless power transmission - WPC / PMA;
the PeerPower function ensures the operation of the microcircuit as an energy transmitter;
output voltage adjustable from 3.5 to 12.7 V in 100 mV steps;
integrated synchronous full bridge rectifier;
programmable foreign object detection function (FOD - Foreign Object Detection);
implementation of overvoltage, temperature, overcurrent and short circuit protection;
housing WLP52.

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