Driver Circuit Using Dynamic Regulation and Related Techniques

摘要

An LED driver circuit selects a regulated voltage value for use in driving one or more LEDs based on dimming duty cycle. In some embodiments, the regulated voltage value may be selected in accordance with a function that decreases monotonically with increasing dimming duty cycle. In this manner, LED current accuracy can be achieved at lower dimming duty cycles, while still achieving enhanced operational efficiency at higher dimming duty cycles.

主权项

1. A method for use in driving one or more LED loads, comprising:
regulating a voltage associated with at least one LED load; and varying a regulated voltage value used during regulating based, at least in part, on a present dimming duty cycle associated with the at least one LED load.