QR-Mode PWM Controller with Wide VCC Operation Range

Features

l   Low Start-Up Current

l   Wide VCC Operation Range up to 85V

l   Soft Driving to Reduce EMI

l   Multi-Mode Operation (QR/DCM/Burst) QR Operation @ Full/Medium Load   DCM Operation @ Light Load

Burst Mode at No Load

l   Switching Frequency up to 160KHz

l   8ms Soft-Start

l   Over Current Protection (OCP)

l   Over Load Protection (OLP)

l   Short Circuit Protection (SCP)

l   Brown in/out on ZCD Pin

l   Over Voltage Protection on VCC Pin

l   Output Over Voltage Detection on ZCD Pin

l   Output Diode Short Circuit Protection (ODSP)

l   On Chip OTP Protection

l   SOT23-6 Package

Description

GR1238  is  a  high  performance  multi-mode (QR/DCM/Burst) operation PWM controller for application on flyback converter.  It could turn standby mode to green mode for high switching efficiency. It provides several 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   PD+QC Charger

l   Switching Mode Power Supply

Typical Application Information