LD7832

4/12/2013

1

Leadtrend Technology Corporation

www.leadtrend.com.tw

LD7832-DS-00 April 2013

High Power Factor LED Controller with HV Start-up

REV: 00

General Description

The LD7832 is a buck solution with high PFC control for

LED lighting. It features HV start-up, easy to design with

minimum cost and PCB size. The device operates in

transition(TM) mode and integrates with complete safety

requirement protections.

With HV start-up technology, high power factor and TM

control, the system is enabled to achieve high PF and

high efficiency to meet most of the international standard.

The LD7832 also features LED open protection (OVP),

LED short protection (ZCD UVP), over current protection

(OCP), CS short protection (CSSP), open feedback

protection and over temperature protection (OTP). It

makes the circuit designers easily to meet most safety

requirements in either normal or abnormal test.

Features

(Option: with ZCD OVP disabled, LD7832A)

Applications

Typical Application

HV

GATE

COMP

VCC

ZCD

Rs

GND

EMI

Filter

AC

Input

CS

Option

Fig. 1 Application circuit