LD7592GS datasheet(1/15 Pages) LEADTREND

Il numero della parte	LD7592GS

Spiegazioni elettronici	Transition-Mode PFC Controller with Fault Condition Protection

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LD7592

06/05/2017

1

Leadtrend Technology Corporation

www.leadtrend.com.tw

LD7592-DS-00 June 2017

Transition-Mode PFC Controller with

Fault Condition Protection

REV. 00

General Description

The LD7592 is a voltage mode PFC controller operating on

transition mode, with several integrated functions of

protection, such as OVP, OCP, and Brown-in protection. It

reduces the components counts and is available in a

SOP-8 or DIP-8 package. Those make it an ideal design

for low cost applications.

It provides functions of low startup current, over voltage

protection, open feedback protection, disable function,

over

current

protection, under

voltage lockout

and

integrated LEB of current sensing. The LD7592 adopts

transition mode for power factor correction and realizes

high efficiency and a low switching noise by zero current

switching.

Typical Application for Boost PFC

Features

 Transition Mode of PFC Pre-Regulator

 Voltage Mode Control

 Programmable Max. On-Time

 ZCD Auxiliary Winding is Unnecessary

 Low Startup Current (<1

A)

 UVLO (Under Voltage Lockout)

 LEB (Leading-Edge Blanking) on CS pin

 VCC OVP (Over Voltage Protection) on VCC pin

 VO OVP (Over Voltage Protection) on INV pin

 Bulk Cap OVP (Over Voltage Protection) on OVP pin

 OCP (Cycle by Cycle Current Limit)

 900/-1200mA Driving Capability

 Internal OTP (Over Temperature Protection)

Applications

 Adaptor of Output above 75W.

 LCD TV Power Supply

AC

Input

LD7592

OUT

CS

GND

COMP

VCC

RAMP

EMI

Filter

INV

OVP

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