Patent ID: 8907590
Filing Date: 2014-12-09
Classification: H05B

Abstract:
1. A light-emitting diode (LED) driver control loop that drives a LED light, comprising: a LED driver, coupled to the LED light, the LED driver receiving a switched mode supply and generating a LED current to drive the LED light according to a driver control, the switched mode supply being a pulsed voltage that comprises a plurality of powering cycles and including a dead band between every two consecutive powering cycles; a charge integrator, coupled to the LED driver and the LED light, the charge integrator generating a charging voltage that increases at a rate associated with the LED current during each powering cycle; a driver controller, coupled to the charge integrator, the driver controller disabling the driver control when the charging voltage reaches a clamping voltage during each powering cycle and resetting the driver control at the end of each powering cycle; and a voltage modulator, coupled to the driver controller, the voltage modulator adjusting the level of the clamping voltage according to the driver control at the end of each powering cycle.