Patent ID: 11895749
Assignee: JOULWATT TECHNOLOGY CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 8:
9. An LED drive circuit, comprising:
a dimmer, wherein the dimmer is configured to cut a phase of an input AC power supply to output a first voltage signal;
a rectifying circuit, wherein the rectifying circuit is configured to rectify the first voltage signal to output a second voltage signal to a DC bus;
a controller, wherein the controller is configured to generate a control signal according to a preset maximum on-time parameter and a preset current limit parameter;
a power conversion circuit, wherein the power conversion circuit is configured to control a drive current flowing through an LED load based on the second voltage signal and the control signal; and
a parameter regulating circuit, wherein the parameter regulating circuit is configured to select preset values of the maximum on-time parameter and the current limit parameter according to the second voltage signal, wherein the preset values are input to the controller.