Summary of ST’S STEVAL-USBPD27S TO SPEED UP THE BUILT TIME OF FAST-CHARGING USB POWER ADAPTERS
STMicroelectronics’ STEVAL-USBPD27S is a compact USB PD 3.0 reference design delivering up to 27 W with PPS and zero-power idle when no cable is connected. It uses a three-stage architecture (power supply, power control, digital control) centered on an STM32G071KB MCU to manage USB Type-C, PD 3.0, and VBUS control. The design includes an onboard flyback converter with STCH03 PWM controller and TCPP01-M12 for port protection, providing two fixed PDOs (5V@5A, 9V@3A) and two APDOs (5VProg@5A, 9VProg@3A).
Parts used in the STEVAL-USBPD27S:
- STM32G071KB Arm Cortex-M0+ MCU
- STCH03 PWM controller
- TCPP01-M12 Type-C port protection chip
- Onboard flyback converter (high-performance, low-voltage PWM controller in same package)
- USB Type-C connector
- Power delivery 3.0 protocol firmware/algorithm on MCU
- Power supply and power control stage components (unspecified discrete components)
USB has evolved over the last few years with the latest launch of the ST’s standalone VBUS-based controller. To help build a compact and efficient power adapter that provides up to 27W with zero-power operation when no cable is connected, STMicroelectronics has unveiled a new reference design with Programmable Power Supply (PPS). All new ST’s STEVAL-USBPD27S solution introduced has the PPS capabilities through three-stage architecture. Apart from the power supply section and the power control stage is the digital control stage that is built around the STM32G071KB Arm Cortex-M0+ MCU that controls the USB Type-C connector and the Power Delivery 3.0 communication protocol.
One of the key technical benefits lies in the specific algorithm running on the MCU that can control the VBUS on the secondary side, and is “compliant to USB Type-C and Power Delivery and PPS specifications”. The onboard flyback converter combines a high-performance, low-voltage PWM controller chip on the same package. For Type-C port protection, the solution is provided with a single chip solution – TCPP01-M12 – that ensures robustness and protection.
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 STEVAL-USBPD27S is USB power delivery 3.0 compliant with a wide range of input voltages. This is capable of delivering:
- Two fixed PDOs: 5V@5A, 9V@3A
- Two APDOs (PPS): 5VProg@5A, 9VProg@3A
This compact form factor of 59 x 35 x 21mm in size and 10.2 W/inch3 that has a standard output power of 27 W. With the STCH03 PWM controller offers several advantages to the solution featuring “high-voltage start-up circuitry, primary-side constant-current output regulation, and advanced power management”.
Read more: ST’S STEVAL-USBPD27S TO SPEED UP THE BUILT TIME OF FAST-CHARGING USB POWER ADAPTERS
- What is the maximum output power of the STEVAL-USBPD27S?
The standard output power is 27 W. - Which MCU is used for digital control in the reference design?
The design uses the STM32G071KB Arm Cortex-M0+ MCU. - Does the design support USB Power Delivery 3.0?
Yes, the STEVAL-USBPD27S is USB Power Delivery 3.0 compliant. - What programmable power supply (PPS) APDOs are provided?
Two APDOs are provided: 5VProg@5A and 9VProg@3A. - What fixed PDOs does the adapter offer?
Two fixed PDOs are offered: 5V@5A and 9V@3A. - How does the design ensure Type-C port protection?
It uses a single chip solution TCPP01-M12 for Type-C port protection. - What advantage does the MCU-based solution provide?
It gives flexibility to implement customized application layers and incorporate ongoing USB PD standard improvements. - What are key features of the STCH03 PWM controller in the design?
The STCH03 offers high-voltage start-up circuitry, primary-side constant-current output regulation, and advanced power management. - What is the physical size and power density of the reference design?
The form factor is 59 x 35 x 21 mm with 10.2 W/inch3.
