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

 2012-07-04

LEDLighting快速發展,高功因需求已成為主流,SingleStagePFC目前是LEDLighting主要架構,目前LED Lighting 市面上大都沿用PFC IC(L656x,LD7591,等),但由於此類IC原始設計是給Boost PFC 架構,應用在LED lighting上必須外加”一堆”電路才能符合法規(Energy Star)及安規(UL)等應用.

LD7830簡介:


1. LD7830 主要規格分為(1)起動時間,(2)保護(3)空載功率三部份

2. 規格主要是為符合Energy Star, Eup , UL 與特殊客戶內規

3. 與現有LD7591比較如下:

 

 

LD7830 LED lighting 應用線路:

 

 

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