QR-Mode PWM Controller with Integrated Protections

Features

l Low Start-Up Current

l Multi-Mode Operation (QR/PFM)

QR Operation @ Full/Medium Load Burst Mode at No Load

l Switching frequency is up to 160KHz

l 8ms Soft-start

l Over Current Protection (OCP)

l Over Load Protection (OLP)

l Short circuit protection (SCP)

l Adjustment OVP on ZCD Pin

l Over Voltage Protection on VCC Pin

l Input Over Voltage Protection (Vin OVP)

l Brown in/out

l Peak load function

l Output diode Short circuit protection

l On Chip OTP Protection

Description

GR1235Q  is  a  high  performance  multi-mode  (QR/PFM) PWM controller for flyback converter. It could turn standby mode to green mode for  high switching efficiency. It provides functions  of low startup current, Over Current Protection

Over     Voltage     Protection,     Short     circuit protection Output diode Short circuit protection and internal OTP to prevent the circuit being damaged.

Application

l Switching AC/DC power adapter

l SMPS Power Supply

Typical Application Information