BCT3258 Datasheet | BROADCHIP

August , 2012, REV2.1 8 Channel Constant Current LED Driver Low Dropout Current Sink General Description The BCT3258 is a high performance constant current white LED driver. The BCT3258 uses an internal resistor to set the bias current for 8 LEDs, which are matched to 3%. The BCT3258'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 BCT3258 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...