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All   >>  LED Lighting   >>   LCD Backlighting Applications   >>   Questions
 

Hello. my name is thomas ciciyan, from iran. my question is about LED drivers of an huge full color LED TV. how does that LED drivers work with 3 or more color LED's, and with a lot of different color depths depended on a video signal? can you show me a diagram to demonstrate combination of circuits or block diagrams that converts a video signal to a momentary constant current to drive 3 different color LED's?

The NCP5623B is to control three LED arranged in the RGB color structure .The brightness of each LED is independently controlled by a set of dedicated PWM structure embedded into the silicon chip. The peak current, identical for each LED, is programmable by means of the I2C data byte. With 32 steps per PWM, the chip provides 32768 colors hue in a standard display. For example the NCP5623B is triple output I2C controlled RGB LED driver. Please see our datasheet for more application details, Triple Output I2C Controlled RGB LED Driver Datasheet. Answered by:
ON Semiconductor
2013-04-04 09:48:07.418