August 2016

DocID029594 Rev 1

1/6

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STEVAL-ISA193V1

15 W, 5 V - 3 A output CC primary sensing USB adapter based

on STCH02

Data brief

Features



Universal AC Main Input voltage range : 90



Output range: 5 V - 3 A continuous operation



Constant voltage (CV) and constant current

(CC) operation with CC primary sensing





Average efficiency: > 81.84%, complies with

EuCoC rev. 5

– Tier 2 and EPS of DOE USA



EMI: According to EN55022-Class-B



Small form factor: (44 x 35 x 15 mm)



RoHS compliant

Description

The STEVAL-ISA193V1 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.