ST Eases Design of USB Type-C Power Adapters with PPS Reference Design

Geneva-headquartered semiconductors manufacturer STMicroelectronics has revealed 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 27W with zero-power operation when no cable is connected.

February 19, 2021. By Manu Tayal

Geneva-headquartered semiconductors manufacturer STMicroelectronics has revealed 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 27W with zero-power operation when no cable is connected.

The USB PPS help in saving power, and reduce device-charging times and heat dissipation, contributing also to cut bill-of-materials costs on the device side.

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 state-of-the-art PWM controller and TCPP01-M12 USB Type-C protection IC.

With this reference design, 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 40mW.

As an MCU-based solution, the reference design gives users extra flexibility to implement additional customized application layers and to incorporate ongoing improvements as the USB Power Delivery standard evolves.

The power section of the STEVAL-USBPD27S leverages ST’s highly 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 ensures high efficiency, ultra-low standby consumption, and excellent dynamic performance.

The STD7N65M6 MDmesh M6 primary-side high-voltage STPOWER MOSFET delivers extremely high efficiency with optimized switching behavior in hard and soft switching modes.

Finally, the TCPP01-M12 provides ±8kV 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.

Delivered as a turnkey evaluation module in a compact 59mm x 35mm x 21mm outline with power density of 10.2 Watts per cubic inch, the STEVAL-USBPD27S is ready to order now for USD 95.

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