STWBC2-HP Digital controller for wireless battery charger transmitters

The STWBC2HP is a digital controller specifically designed for wireless power transmitter (TX) applications. It is a System-in-Package (SiP) that includes an STM32 microcontroller and an application-specific front-end die.

The STWBC2HP is capable of driving the DC-DC stage and the half- or full-bridge inverter stage of a generic wireless battery charging transmitter (TX). It generates and controls the relevant PWM signals using a PWM machine with a resolution of 1.47 ns. To achieve this, the front-end die includes a 40 MHz PLL and a 17-step DLL.

The STWBC2HP front end can work from any DC voltage in the range of 4.1 V to 24 V and embeds:

The STM32 microcontroller features an Arm Cortex™-M0+ CPU with up to 128 KB of flash memory and up to 32 KB of SRAM with parity check, operating at a clock frequency of up to 64 MHz. It also includes a 12-bit, 0.5 μs ADC and provides UART, I2C, SPI, and GPIO interfaces.

The STM32 embedded in the STWBC2HP also provides two 12-bit DACs and a USB Power Delivery controller.