The LTC4125 from Analog Devices is a Wireless Power Transmitter IC that operates from 3 to 5 V. It consists of a monolithic full bridge resonant driver that is capable of delivering over 5 W of power wirelessly to a properly tuned receiver. The wireless transmitter IC driver controls the current flow to create a simple, safe and versatile wireless power transmission. It automatically adjusts its driving frequency to match the LC network resonant frequency. To optimize system efficiency, this IC employs a periodic transmit power to search and adjust the transmission power based on the receiver load requirements.

The LTC4125 consists of a programmable current limiter and an NTC input as additional means for a foreign object and overload protection. It is available in a QFN package that measures 4 x 5 mm and is ideal for medical equipment, military sensors and devices, industrial handhelds, and hermetically and/or electrically insulated devices.