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Leadtrend : 推出High Power Factor LED Controller with HV Start-up Solution_LD7830

 2012-07-04

LEDLighting快速发展,高功因需求已成为主流,SingleStagePFC目前是LEDLighting主要架构,目前LED Lighting 市面上大都沿用PFC IC(L656x,LD7591,等),但由于此类IC原始设计是给Boost PFC 架构,应用在LED lighting上必须外加”一堆”电路才能符合法规(Energy Star)及安规(UL)等应用.

 

LD7830简介:

1. LD7830 主要规格分为(1)起动时间,(2)保护(3)空载功率三部份

2. 规格主要是为符合Energy Star, Eup , UL 与特殊客户内规

3. 与现有LD7591比较如下:LD7830 LED lighting

 

 

应用线路:

 

 

 

High Power Factor LED Controller LD7830

Features

 

• High voltage (500V) startup circuit

• High Power Factor Flyback PFC controller

• High efficiency Transition mode operation

• Wide UVLO (16V on and 8V off)

• 250kHz max frequency

• VCC OVP(Over Voltage Protection)

• OLP(Over Load Protection)

• OCP(Cycle by cycle current limiting) Vcs=0.5V

• OTP(Over Temperature Protection)

• 500/-800mA Driving Capability

• Internal OTP function

 

 

Applications 

Flyback PFC Power Supply for LED