首页>
外国专利>
Method for optimizing efficiency versus load current in an inductive boost converter for white LED driving
Method for optimizing efficiency versus load current in an inductive boost converter for white LED driving
展开▼
机译:在用于白光LED驱动的电感升压转换器中优化效率与负载电流的方法
展开▼
页面导航
摘要
著录项
相似文献
摘要
Circuits and methods to achieve a most efficient driver for white LEDs are disclosed. Switching Losses associated with the switching activity of a boost converter and mainly depending on clock frequency and total capacitance at the switching nodes and conduction losses associated with the current flowing in the boost converter and mainly depending on the series resistance of the elements in the regulation loop are minimized by using a size programmable NFET power switch with constant current limit, a very low voltage and accurate programmable current source, a programmable reference voltage for the error amplifier, and a PWM generator with programmable clock frequency. A limited number of configuration windows corresponding to a set of programmable values (OTP registers) for specific ranges of the current fed to the WLEDs.
展开▼