Preliminary GR1230H
Multi-Mode PWM Controller with Integrated Protections
Features
Low Start-Up Current (<3uA)
Multi-Mode Operation
CCM @ Heavy Load and Low Line
QR-Like Operation @ Medium Load
Green mode with Valley Skip at Light Load
Burst Mode at No Load
Accurate Over Current Protection
Adjustment OVP on QRD Pin
Output Short Protection
Soft Driver
4ms Soft-start
OVP (Over Voltage Protection) on Vcc Pin
On Chip OTP Protection
SOT-26 Package with Few External
Components Needed
Description
The GR1230H is a high performance multi-mode
(QR/CCM) PWM controller for flyback converter. It
minimizes the components counts and is available
in a tiny SOT-26 package. Those make it an ideal
design for low cost application. It provides functions
of low startup current, green- mode power-saving
operation, VCC over-voltage protection, and QRD
pin abnormal conditions sensing to prevent the
circuit being damaged from the abnormal
conditions.
Applications
Switching AC/DC power adapter
SMPS Power Supply
Typical Application Information
EMI
FILTER
QRD
VCC
GR1230H
GND
OUT
COMP
CS
2014.03. Ver. A Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
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