Multi-Mode PWM Controller with Integrated Protections

Features

l Low Start-Up Current (<2uA)

l 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

l Accurate Over Current Protection

l Adjustment OVP on QRD Pin

l Output Short Protection

l Soft Driver

l 8ms Soft-start

l OVP (Over Voltage Protection) on Vcc Pin

l On Chip OTP Protection

l SOT-26 Package with Few External Components Needed

Description

The GR1230 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

l Switching AC/DC power adapter

l SMPS Power Supply

Typical Application Information

Package