Applications

Adaptor/ Open Frame Power Supply

LCD Monitor/TV Power Supply
Description
The GR8875N series is a highly-integrated, low
startup current, current mode PWM controller with
green-mode function, high-voltage start up circuit,
and provides several protections such as OLP, OVP,
and OCP for fault conditions. A high-voltage current
source supplies the start up current and the
traditional start up resistance can be saved in order
to reduce the start up power loss. The controller
also includes the leading-edge blanking of the
current sensing, internal slope compensation and
cycle-by-cycle peak current limiting. It is also
integrated soft driving for reducing EMI, gate output
voltage clamp function for protecting power
MOSFET

Features

High-Voltage (700V) Startup Circuit

Very Low Startup Current (<30uA)

Under-Voltage Lockout (UVLO)

100mW Standby Power

Non-Audible-Noise Green-Mode Control

65KHz Switching Frequency with Jittering for
Reducing EMI

Cycle-by-Cycle Peak Current Limiting

Internal Leading-Edge Blanking

Internal Slope Compensation

Gate Output Maximum Voltage Clamp

Internal 6mS Soft Start

Soft Driving for Reducing EMI

AC Input Brownout Protection with Hysteresis

Programmable Over Temperature Latch (OTP)
Function

Over-Voltage Protection (OVP) on VCC pin

Over-Load Protection (OLP)

Flexible Latch Shutdown Combination: OVP;
OVP+OTP

500mA Driving Capability

SOP-8 /SOP-7/DIP-8 Green Package