STMicroelectronics STEVAL-USBPD27S USB Type-C Power Delivery 3.0 reference design

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STMicroelectronics has released a USB Type-C Power Delivery 3.0 reference design with programmable power supply (PPS) support to accelerate the design of easy-to-use, compact and efficient power adapters up to 27 W with zero-power operation when no cable is connected. USB PPS helps to save power and reduce device charging times and heat dissipation.

The STEVAL-USBPD27S reference design combines the STM32G071 microcontroller (MCU), which integrates a complete USB Type-C Power Delivery controller on-chip, with the STCH03 PWM controller and TCPP01-M12 USB Type-C protection IC. Users can quickly build fast-charging USB power adapters that meet the stringent European CoC version 5 Tier-2 and US DOE Level VI requirements for minimum four-point average efficiency in active mode and standby power below 40 mW.

The MCU handles the entire digital control section, including the algorithm to control VBUS on the secondary side as well as ST’s algorithm for adaptive synchronous rectification, which enhances energy efficiency. As an MCU-based solution, the reference design gives users extra flexibility to implement additional customised application layers and to incorporate ongoing improvements as the USB Power Delivery standard evolves.

The power section of the reference design leverages ST’s integrated STCH03 PWM controller, which features built-in high-voltage start-up circuitry, primary-side constant-current output regulation and advanced power management. Designed for quasi-resonant zero-voltage switching (ZVS) flyback converters, the STCH03 features high efficiency, ultralow standby consumption and good dynamic performance.

The STD7N65M6 MDmesh M6 primary-side high-voltage STPOWER MOSFET delivers high efficiency with optimised switching behaviour in hard and soft switching modes. Finally, the TCPP01-M12 provides ±8 kV ESD protection for the USB VBUS and Configuration Channel (CC) lines, meeting IEC 61000-4-2 Level 4. There is also short-circuit protection between the VBUS pins and CC lines and protection to prevent equipment damage if a defective cable is inserted.

For more information: https://www.st.com/en/evaluation-tools/steval-usbpd27s.html.