August , 2012, REV2.
1 BCT3256 6 Channel Constant Current LED Driver Low Dropout Current Sink General Description The BCT3256 is a high performance constant current white LED driver.
The BCT3256 uses an internal resistor to set the bias current for 6 LEDs, which are matched to 3%.
The BCT3256's advantages over ballast resistors include much lower bias variation with supply voltage variation, significantly lower dropout voltage, and in some applications, significantly improved efficiency.
The BCT3256 requires only a 50mV dropout voltage at a 20mA load on each output to match the LED brightness.
Users can easily configure the LED current from 1.
25mA to 20mA by a serial pulse interface.
The dim...

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