The STEVAL-ISB039V1 from STMicroelectronics is a wireless battery charger evaluation kit based on the STM32F0 microcontroller for wireless battery charger transmitters and the STWLC03 integrated wireless power receiver. The STEVAL-ISB039V1 solution is primarily designed for small systems up to 1W that can be recharged easily, and can be adjusted for 2.5W.
For the wireless power transmitter, the firmware consists of a single STM32CubeMX platform-independent library providing a simple and easily customizable solution for the design of wireless power transmitters with proprietary features.
The STWLC03 receiver can deliver the output power in two modes: as a power supply with configured output voltage or as a simple CC-CV battery charger with configurable charging current, charging voltage and termination current. The I2C interface allows the customization of parameters in the device and and the storage of configurations in the embedded non-volatile memory.
Key features of this wireless charging system include: STM32F0 for wireless power transmitter and STWLC03 for wireless power receiver; 1W output power; and WPC 1.1 based communication protocol.
Main features of the transmitter include: high efficiency N-channel Half Bridge architecture with adaptive dead-time control; synchronous digital demodulation of power carrier, reduces BoM considerably; standard or enhanced power transmitter coil; coil temperature monitoring through NTC; MCU firmware open for customization; and built-in USB connector for input supply voltage.
Main features of the receiver include: integrated high efficiency synchronous rectifier; integrated 1MHz programmable buck converter with input current and input voltage regulation loops; and simplified Li-Ion/Polymer charger function.
