This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to

change without notice.

December 2015

DocID028766 Rev 1

1/24

STCH02

Offline PWM controller for ultra-low standby adapters

Datasheet

Features

 Advanced power management for ultra-low

standby power consumptions (under 10 mW at

230 Vac)

 Fully integrated primary side constant current

output regulation (CC)

 650 V embedded HV start-up circuit with zero

power consumption.

 Quasi resonant (QR) zero voltage switching

(ZVS) operation

 Automatic self-supply

 Accurate and adjustable output OVP with

autorestart after fault

 Input voltage feedforward compensation for

mains-independent CC regulation

 Intelligent frequency jitter for EMI suppression

 SO-8 package

Applications

 AC-DC chargers for smartphones, tablets,

camcorders and other handheld equipment

 AC/DC adapters for STB, notebooks and

auxiliary power supplies

Description

The STCH02 is a PWM quasi resonant controller

specifically designed for ultra-low standby power

supplies.

The built-in HV startup cell with zero power

consumption, the fully integrated blocks for

primary side constant current output regulation

and the advanced power management make this

IC the best choice to build a high efficiency and

ultra-low standby consumption power supply, with

high overall and excellent dynamic performances.

Figure 1. Typical application

SO-8

Table 1. Device summary

Order code

Package

Packing

STCH02

SO-8

Tube

STCH02TR

Tube and reel

www.st.com