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

Claim 12:
13. The LED drive circuit according to claim 11, wherein the parameter regulating circuit comprises:
a sampling unit, wherein the sampling unit is configured to sample the second voltage signal and generate a sampling signal;
a comparing unit, wherein the comparing unit is configured to judge a magnitude relationship between the time when the second voltage signal in the preset voltage interval and the preset time threshold according to the sampling signal, and the comparing unit is configured to generate a regulating signal according to a judgment result; and
a first regulating unit, wherein the first regulating unit is configured to receive the regulating signal, and when the regulating signal is in a first level state, the first maximum on-time parameter and the first current limit parameter are output to the controller; when the regulating signal is in a second level state, the second maximum on-time parameter and the second current limit parameter are output to the controller.