STWBC2-HP Digital Controller STMicroelectronics STWBC2-HP Digital Controller is specifically built to design Qi-certified Wireless Power TX applications. The STWBC2-HP is a SiP with an STM32™ microcontroller (STM32G071), and an application-specific front-end die. The STMicro STWBC2-HP can drive the DC-DC and half- or full-bridge inverter stages of a generic Qi wireless battery charging TX. The device generates and controls the relevant PWM signals employing a PWM machine capable of 1.47ns resolution. The front-end die includes a 40MHz PLL and a 17-step DLL to achieve these PWM signals.