STMicroelectronics EVLSTCH03-45WPD

Overview

EVLSTCH03-45WPD from STMicroelectronics is a USB-IF certified 45 W USB Type-C® Power Delivery 3.0 evaluation board implementing an isolated quasi-resonant flyback topology with adaptive synchronous rectification, STCH03 primary-side controller, SRK1001 secondary-side SR driver, and STUSB4761 hardware-based PD stack - delivering programmable 5–20 V output profiles up to 2.25 A at 20 V, >90% peak efficiency, and <30 mW no-load consumption.

For engineers reviewing the EVLSTCH03-45WPD datasheet, EVLSTCH03-45WPD pinout, EVLSTCH03-45WPD application, or EVLSTCH03-45WPD equivalent, this reference design supports rapid development of compact, DOE/CoC-compliant AC-DC adapters with integrated ESD protection (ESDA25L), optocoupler feedback, and full CC/CV regulation for USB-C PD negotiation.

Technical Context

The EVLSTCH03-45WPD implements a primary-side quasi-resonant flyback converter controlled by the STCH03 IC (650 V HV start-up + PWM), driving an STD7N65M6 MDmesh™ M6 MOSFET. Voltage regulation uses optocoupler feedback (SFH617A-2) referenced to secondary-side sensing.

Secondary-side control integrates SRK1001 adaptive synchronous rectification (driving STL110N10F7 STripFET™ F7) and STUSB4761 - a fully hardware-implemented USB PD 3.0 controller handling CC logic, VBUS enable, fault reporting, and precise 5/9/12/15/20 V profile selection per USB-IF TID 2071.

Key Specifications

Availability

EVLSTCH03-45WPD is available at Aetrix Electronics and suitable for USB-C PD adapter development, industrial power supply prototyping, and consumer electronics compliance validation requiring stable component supply, traceable sourcing, and reference design fidelity.

Supply support for EVLSTCH03-45WPD 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, Switzerland, designing and manufacturing microcontrollers, power ICs, analog chips, and discrete components for industrial, automotive, and consumer applications.

The EVLSTCH03-45WPD belongs to ST's USB Power Delivery Reference Design portfolio, engineered to accelerate time-to-market for compact, high-efficiency, standards-compliant AC-DC adapters using ST's integrated controller ecosystem.

FAQ

Is EVLSTCH03-45WPD a production-ready power supply or an evaluation board?

EVLSTCH03-45WPD is a fully assembled, USB-IF certified evaluation board intended for design verification, compliance testing, and reference implementation-not for end-product integration. It includes test points, configurable jumpers, and documented schematics (DB4053) to support derivative designs.

Which ICs are used on the primary and secondary sides?

The primary side uses STCH03 (650 V quasi-resonant flyback controller with HV start-up) driving STD7N65M6 (650 V MDmesh™ M6 MOSFET). The secondary side integrates SRK1001 (adaptive synchronous rectifier controller) driving STL110N10F7 (100 V STripFET™ F7), plus STUSB4761 (hardware-based USB PD 3.0 controller).

Does the board support Programmable Power Supply (PPS) mode?

No - EVLSTCH03-45WPD implements fixed PDOs only (5 V/3 A, 9 V/3 A, 12 V/3 A, 15 V/3 A, 20 V/2.25 A) per USB PD 3.0 specification. It does not support PPS, which requires dynamic voltage adjustment in 20 mV steps and is not implemented in the STUSB4761 firmware/hardware configuration on this board.

What safety and EMI standards does it meet?

EVLSTCH03-45WPD complies with EN 60065 (audio/video safety), EN 55022 Class B (conducted/radiated EMI), and meets DOE Level VI and EU CoC Tier 2 energy efficiency requirements. It includes dual-transil ESD protection (ESDA25L) on the USB-C connector per IEC 61000-4-2 Level 4.