Chapter 284

Offline LED lighting simplified: high power factor, isolated LED driver needs no opto-isolators and is TRIAC dimmer compatible

Wei Gu


The LT3799, a complete offline LED driver solution featuring standard TRIAC dimming, active PFC and well-regulated LED current with no opto-coupler, is described.


LED lighting

TRIAC dimming



As environmental concerns over traditional lighting increase and the price of LEDs decreases, high power LEDs are fast becoming a popular lighting solution for offline applications. In order to meet the requirements of offline lighting—such as high power factor, high efficiency, isolation and TRIAC dimmer compatibility—prior LED drivers used many external discrete ...

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