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27 W AC-DC adapter reference design, USB Type-C port, supports programmable power supply (PPS), adaptive synchronous rectification function

STEVAL-USBPD27S

Overview

The STEVAL-USBPD27S 27 W AC-DC adapter reference design works as USB Power Delivery Provider with a single USB Type-C port supporting Programmable Power Supply (PPS) and featuring adaptive synchronous rectification. Thanks to a minimal bill of materials, it allows users to easily design compact and cost-effective adapters.

The reference design accepts a wide range of input voltage and delivers two well regulated fixed PDOs (5V@5A, 9V@3A) and two APDOs (5VProg@5A and 9VProg@3A), finely adjusted to the advertised voltage range (Programmable Power Supply or PPS), thus managing the V_CONN, as requested by the USB Power Delivery specification.
The adapter meets the most stringent energy saving recommendations (EU CoC – Tier 2 ver. 5 and DOE Level VI) ensuring < 40mW of no load power consumption. All PDOs are compliant with CoC ver. 5 – Tier 2 and DOE Level VI requirements except the 9VProg@3A APDO, guaranteeing the compliance with the minimum four-point average efficiency in active mode.
The system has been tested to verify conducted noise emissions and compliance with the EN55022 (Class B) using standard average detectors, at half and full load with input voltage of 115 V_AC and 230 V_AC.

Main features

USB Power Delivery 3.0 Compliant
Universal input mains voltage range: 90 VAC to 264 VAC (line frequency: 45 Hz to 65 Hz)
PD Output
- Two fixed PDOs: 5V@5A, 9V@3A
- Two APDOs (PPS): 5VProg@5A, 9VProg@3A
PPS Mode: 20 mV step for CV, 50 mA step for CC
Output Power: 27 W
Minimum four-point average efficiency in active mode compliant with CoC ver. 5 – Tier 2 and DOE Level VI requirement
Adaptive Synchronous Rectification controlled by on-board MCU

Load feed-forward
OVP, UVP, OC, short-circuit protections
ESD Protection exceeding IEC61000-4-2 Level 4 on CC lines
Immunity against surge current on VBUS pin up to 35 A in a 8/20 µs waveform, according to IEC61000-4-5
Compliant with EN55022 (Class B) standard for conducted noise emissions
Compact form factor:
- 59x35x21mm dimensions
- 10.2 W/inch³ power density
RoHS compliant

Design Files

All reference designs on this site are sourced from major semiconductor manufacturers or collected online for learning and research. The copyright belongs to the semiconductor manufacturer or the original author. If you believe that the reference design of this site infringes upon your relevant rights and interests, please send us a rights notice. As a neutral platform service provider, we will take measures to delete the relevant content in accordance with relevant laws after receiving the relevant notice from the rights holder. Please send relevant notifications to email: bbs_service@eeworld.com.cn.

It is your responsibility to test the circuit yourself and determine its suitability for you. EEWorld will not be liable for direct, indirect, special, incidental, consequential or punitive damages arising from any cause or anything connected to any reference design used.

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Update:2025-05-08 15:05:37

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