STMicroelectronics – Integrated wireless power receiver IC supports Qi and PMA standards


The STWLC03 is a wireless power receiver IC which complies with the popular Qi standard for wireless charging equipment backed by the Wireless Power Consortium (WPC), and also with the standard technology of the Power Matters Alliance (PMA).

The STWLC03 consists of a wireless power receiver, a programmable 1MHz buck power converter with a basic lithium-polymer or lithium-ion battery charger function, an embedded 32-bit microcontroller and a 2kbyte non-volatile memory. The on-board MCU allows for end-product customisation and support for different standards.

The power converter features a synchronous rectifier, which provides for efficiency up to 92%. Offering a configurable soft-start function, its input-current and input-voltage regulation loops are optimised for operation in a wireless charging environment.

If wireless power is not available, the device can be supplied by an external supply such as a USB port. It can connect this supply to the output voltage pin through an external switch. The embedded microcontroller communicates 2 with the host platform through an I C interface. The device implements frequency detection, and the driver for the external switch.


  • Up to 7.5W output power
  • 10-bit, 8-channel ADC
  • Four configurable GPIOs
  • Integrated 5V LDO for auxiliary features
  • Transmitter presence detection
  • Thermal protection


  • Wireless chargers