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Solutions Search - Offline LED Lighting

LT8391 93% Efficient 84W Buck-Boost LED Driver from 24VAC

Sep 2nd 2016
The LT®8391 is a synchronous 4-switch buck-boost LED controller that regulates LED current from input voltage above, below, or equal to the output voltage. The proprietary peak-buck peak-boost current mode control scheme allows adjustable and synchronizable 150kHz to 650kHz fixed frequency operation, or internal ±15% ...

Circuit 

 

Meet Green Standards in 24VAC and 12VAC Lighting Systems: Replace Halogen Bulbs with LEDs Driven by High Power Factor, High Efficiency Converter

Keith Szolusha - Applications Engineering Section Leader Oct 17th 2013
LEDs are increasingly used in 24VAC and 12VAC lighting systems as a robust, energy efficient and high performance alternative to halogen lamps. Power converters that drive the LEDs should have a high power factor (above 90% in order to meet generally accepted green standards), should be efficient, use a minimal number of components ...

Blog Post 

 

Offline Isolated Flyback LED Controller with Active PFC

Wei Gu - Applications Engineer Sep 20th 2011
The LT®3799/-1 isolated LED controller with active power factor correction (PFC) is specifically designed for driving LEDs over a wide input range of 24V to 480V+. It is ideal for LED applications requiring 4W to over 100W of LED power. The LT3799/-1’s unique current sensing scheme delivers a well regulated current to the ...

Video 

 

LT3799 TRIAC Dimmable 20W Offline LED Driver

Feb 4th 2011
This circuit shows a complete LED driver solution. The LT3799 senses the output current from the primary side switch current waveform. The IC regulates the output current by adjusting the peak switch current and the duty cycle through a novel feedback control. Unlike other primary side sensing methods that need to know input ...

Circuit LTspice 

 

Universal Input TRIAC Dimmable 14W LED Driver

Feb 4th 2011
The LT3799 is an isolated flyback controller with power factor correction specifically designed for driving LEDs. The controller operates using critical conduction mode allowing the use of a small transformer. Using a novel current sensing scheme, the controller is able to deliver a well regulated current to the secondary side ...

Circuit 

 

Universal Input TRIAC Dimmable 4W LED Driver

Feb 4th 2011
The LT3799 is an isolated flyback controller with power factor correction specifically designed for driving LEDs. The controller operates using critical conduction mode allowing the use of a small transformer. Using a novel current sensing scheme, the controller is able to deliver a well regulated current to the secondary side ...

Circuit