Circuit diagram of driving 60 pieces of 20mA constant current LED

Published:2011/9/6 22:47:00 Author:Vicky | Keyword: 20mA constant current LED | From:SeekIC

Picture 1 shows the 6 channels of LT3598, and the channels are used to drive the 60 pieces of LED. The current of each channel of LED is set at 20mA. Pin CTRL and pin PWM take responsibility of providing simulating dimming function and digital dimming function respectively. True color PWM dimming offers constant LED color and a dimming proportion of 3000/1. Picture 2 shows ±0.5% typical current-matching accuracy between channels of LED. It generates consistent light distribution, which is very important in application in large-scale backlight.



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