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NCS1002

Information on: NCS1002

• Enhanced PWM LED Dimming Circuit
  Design Note DN05034/D November 2013 The NCL30051LEDGEVB LED driver evaluation board provides PWM dimming capability via gating the resonant half bridge converter on and off at the PWM rate. Effective minimum duty factor is about 10% being limited by biasing considerations. Some applications require wider range PWM dimming often extending to 1% or below. This design note presents a method to achieve PWM dimming from 100% down to less than 1% using an enhanced power control circuit. A series FET ...