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STCH02 Datasheet

Offline PWM controller

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STCH02
Offline PWM controller for ultra-low standby adapters
SO-8
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
Datasheet - preliminary data
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
7PVU
"$*/
"$*/
(/%
;$% '# /$ )7
45$)
4&/4& (/% (% 7%%
".
Table 1. Device summary
Order code
Package
Packing
STCH02
STCH02TR
SO-8
Tube
Tube and reel
December 2015
DocID028766 Rev 1
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to
change without notice.
1/24
www.st.com


STMicroelectronics Electronic Components Datasheet

STCH02 Datasheet

Offline PWM controller

No Preview Available !

Contents
Contents
STCH02
1 Device description and block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Typical circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3 Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.1 Gate driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.2 Frequency jittering for EMI reduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.3 High voltage start-up generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.4 Zero current detection and triggering block . . . . . . . . . . . . . . . . . . . . . . . 13
3.5 Constant voltage operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.6 Constant current operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.7 Voltage feedforward block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.8 Burst mode operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.9 Adaptive UVLO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.10 Overvoltage protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.11 Soft-start and starter block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.12 Hiccup mode OCP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.1 SO-8 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
2/24 DocID028766 Rev 1


Part Number STCH02
Description Offline PWM controller
Maker STMicroelectronics
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STCH02 Datasheet PDF






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