LM5022BOOSTLEDEVAL, AN-1605 LM5022 Boost LED Driver Evaluation Board

LM5022BOOSTLEDEVAL, Evaluation Board using LM5022 low-side controller as a step-up (boost) regulator for delivering constant current to an array of high power LEDs. The ten series-connected white LEDs at a forward current, IF, of 1A 10% from an input of 10V to 14V. White LEDs based on InGaN technology have a forward voltage, VF, of 3.0V to 4.0V, so the expected total output voltage is therefore 30V to 40V. The switching frequency is 300 kHz. Efficiency for the converter is 93% at an input voltage of 12.0V and an output current of 1.0A