Patent ID: 11903109
Assignee: SILERGY SEMICONDUCTOR TECHNOLOGY (HANGZHOU) LTD
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 10:
11. A dimming control circuit for controlling a power converter to perform diming control for a light-emitting diode (LED) load, wherein:
a) a length of a time interval in which an inductor current remains at zero is adjusted, in order to adjust a length of a switching period of the power converter in accordance with a first adjustment signal that is correlated to a dimming signal;
b) the power converter is controlled to generate a drive current corresponding to the dimming signal;
c) when a set value of the dimming signal is decreased, the length of the switching period is controlled to be increased correspondingly to decrease the drive current; and
d) wherein a duty cycle of the first adjustment signal is greater than a duty cycle of the dimming signal.