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
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