Green-Mode PWM Controller with Hiccup Protection

Features

l Current Mode Control

l Standby Power below 75mW

l Under-Voltage Lockout (UVLO)

l Non-Audible-Noise Green-Mode Control

l 65KHz Switching Frequency

l Internal Leading-Edge Blanking

l Internal Slope Compensation

l Internal Soft Start

l Gate Output Voltage Clamp

l Jitter and Soft Driving for Reducing EMI

l External OVP Auto Recovery Mode

l External OTP Auto Recovery Mode

l Over-Load Protection (OLP) -Auto Recovery Mode

l Vcc OVP Protection- Auto Recovery Mode

l 300mA Driving Capability

Description
The GR1837 is a highly-integrated, low startup current, current mode PWM controller with green-mode function. The integrated functions also include the leading-edge blanking of the current sensing, internal slope compensation, soft start

OLP, and OCP. Besides, The RTL pin Auto recovery function by injecting a high over 3.5V to provide OVP Auto recovery and low below 1V to provide OTP Auto recovery protection. These functions enable the power supply to easily meet even the strictest power requirements.

The GR1837 improves the performance and reduces the cost of power supplies. It is with 8-pin DIP and 6-pin SOT-26 package.

Application

l Battery Charger

l Open Frame SMPS

l Switching AC/DC Adapter

Typical Application Circuit

Package