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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.
The STWBC2-HP front end is capable of working from any DC voltage in the range of 4.1V to 24V and embeds:
• 3x half-bridge drivers capable of driving both the FB inverter or the DC-DC MOSFET
• 2x PWM outputs for external gate drivers
• 2x LED/speaker drivers
• 3.6V/5V monolithic buck DC-DC to supply the analog portion of the die
• 3.3V LDO to supply the STM32
• 1.8V LDO to supply the core
• 6V to 9V voltage doubler to supply the gate drivers
• Resonant tank current, voltage, and phase sense circuitry, and Q-factor driver
• USB D+/D- external interface pins for USB PD
