LM3402HVEVAL

The LM3402HVEVAL is an evaluation board for LM3402HV, a buck regulator derived controlled current source designed to drive a series string of high power, high brightness LEDs (HBLEDs) such as the Luxeon emitter at forward currents of up to 500mA. The board can accept an input voltage ranging from 6V to 42V when using the LM3402. When using the pin for pin compatible LM3402HV the upper bound of input voltage is 75V. The converter output voltage adjusts as needed to maintain a constant current through the LED array. The LM3402HV is a true step down regulator with an output voltage range extending from a VO(MIN) of 200mV (the reference voltage) to a VO(MAX) determined by the minimum off time (typically 300ns). It can maintain regulated current through any number of LEDs as long as the combined forward voltage of the array does not exceed VO(MAX).