STMicroelectronics STEVAL-USBPD27S

Overview

STEVAL-USBPD27S from STMicroelectronics is a certified USB Power Delivery 3.1 reference design for 27 W AC-DC adapters with single USB Type-C port, supporting both fixed PDOs (5V@5A, 9V@3A) and PPS APDOs (5VProg@5A, 9VProg@3A), adaptive synchronous rectification, and <40 mW no-load standby power. It implements QR flyback topology with STCH03 PWM controller, STM32G071KB MCU, STD7N65M6 MOSFET, and TCPP01-M2 USB-C protection.

For engineers reviewing the STEVAL-USBPD27S datasheet, STEVAL-USBPD27S pinout, STEVAL-USBPD27S application, or STEVAL-USBPD27S equivalent, this reference design delivers verified PD 3.1 compliance (TID: 5445), CoC v5 Tier 2 / DOE Level VI efficiency, EN55022 Class B conducted noise performance, and full VCONN management per USB PD specification.

Technical Context

The design integrates three functional stages: primary-side QR flyback control via STCH03 (650 V HV start-up, valley skipping, burst mode), secondary-side digital control via STM32G071KB (UCPD interface, PD stack execution, adaptive SR algorithm), and robust USB-C physical layer protection using TCPP01-M2 (IEC61000-4-2 Level 4 ESD on CC lines, 22 V tolerance) and ESDA15P60 (≥30 kV VBUS ESD).

Power delivery complies with USB PD 3.1 Rev 1.3: two fixed PDOs and two APDOs operate within 5–9 V range with 20 mV CV steps and 50 mA CC steps; VBUS surge immunity reaches 35 A (8/20 µs, IEC61000-4-5); conducted emissions meet EN55022 Class B at 115/230 VAC half/full load using average detectors.

Key Specifications

Availability

STEVAL-USBPD27S is available at Aetrix Electronics and suitable for USB PD 3.1 adapter development, PPS-enabled fast-charging system validation, and compact AC-DC reference design integration requiring stable component supply and full certification traceability.

Supply support for STEVAL-USBPD27S includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing microcontrollers, analog ICs, power devices, sensors, and digital ICs for industrial, automotive, and consumer applications.

This reference design belongs to ST's USB Power Delivery ecosystem, engineered to accelerate time-to-certification for compact, high-efficiency, standards-compliant USB-C chargers targeting smartphone, notebook, and portable electronics markets.

FAQ

Is STEVAL-USBPD27S a production-ready power supply or a development tool?

STEVAL-USBPD27S is a fully assembled, tested, and certified reference design board-not a finished end-product power supply. It provides schematic, layout, firmware (STSW-USBPD27SFW), and test reports to enable rapid adaptation into commercial USB PD 3.1 adapters meeting TID 5445 certification requirements.

Which ST components are integrated on the board and what are their roles?

The board integrates STCH03 (primary-side QR flyback PWM controller with 650 V HV start-up), STM32G071KB (Arm Cortex-M0+ MCU running USB PD stack and adaptive SR algorithm), STD7N65M6 (7 A, 650 V MDmesh M6 primary MOSFET), TCPP01-M2 (USB-C port protection with CC-line ESD), and ESDA15P60 (VBUS ESD protection).

Does STEVAL-USBPD27S support VCONN and how is it implemented?

Yes, STEVAL-USBPD27S fully supports VCONN per USB PD specification. The STM32G071KB MCU controls dedicated VCONN power path switching via GPIO-driven circuitry, enabling active cable detection and negotiation-verified during TID 5445 certification testing.

What certifications does STEVAL-USBPD27S hold and where is documentation available?

STEVAL-USBPD27S holds USB-IF TID 5445 (PD Controller) and TID 5445 (Power Brick) certifications. Full compliance evidence-including CoC v5 Tier 2, DOE Level VI, EN55022 Class B, and IEC61000-4-2/4-5 test reports-is provided in DB4227 data brief (Rev 3, September 2021) and ST's official product page.