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STCH02 based 15W, 5V-3A USB adapter with primary side detection CC feature

STEVAL-ISA193V2

Overview

The STEVAL-ISA193V2 evaluation board implements a 15 W USB adapter with primary sensing CC feature, based on the STCH02 current mode controller designed for offline quasi-resonant flyback converters, capable of providing constant output current (CC) regulation using primary-sensing feedback.

The IC embeds a 650 V, non-dissipative, HV startup cell, which, along with the extremely low quiescent current and burst-mode management, helps minimize residual input consumption, thus achieving less than 10 mW under no-load conditions.
The adapter is designed to meet the most stringent energy saving recommendations (EuCoC rev. 5 – Tier 2 and EPS of DOE USA) as well as EN55022-Class-B Conducted noise emissions.
The extremely small form factor and the output USB connector makes this reference design suitable for small USB chargers and adapters for mobile phones, tablets and other hand held equipment

Main features

Universal AC Main Input voltage range : 90 V_AC to 264 V_AC
Output range: 5 V - 3 A continuous operation
Constant voltage (CV) and constant current (CC) operation with CC primary sensing
Input power in standby AC
Average efficiency: > 81.84%, complies with EuCoC rev. 5 – Tier 2 and EPS of DOE USA
EMI: According to EN55022-Class
Small form factor: (44 x 35 x 15 mm)
RoHS compliant
WEEE compliant

Design Files

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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:2025-06-20 11:10:47

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