The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 30, 2025
Filed:
Mar. 21, 2024
Chengdu Monolithic Power Systems Co., Ltd., Chengdu, CN;
Zilin Fan, Hangzhou, CN;
Chengdu Monolithic Power Systems Co., Ltd., Sichuan, CN;
Abstract
A control circuit for a light emitting element driver having a power converter and a shunt switch connected in parallel with the light emitting element. The control circuit has a first control circuit and a second control circuit. The first control circuit provides a dimming process signal and a shunt control signal based on a dimming signal. The second control circuit receives the dimming process signal and a feedback signal representative of an output current of the power converter. When the shunt control signal is at a first level, the shunt switch is turned on, the second control circuit controls the power converter to work in a normal power operation state or a low power operation state. And when the shunt control signal is at a second level, the shunt switch is turned off, the power converter is controlled to work in the normal power operation state.