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:
May. 31, 2022
Filed:
Sep. 02, 2020
Xiamen Kiwi Instruments Corporation, Xiamen, CN;
Bo Zhang, Hangzhou, CN;
XIAMEN KIWI INSTRUMENTS CORPORATION, Xiamen, CN;
Abstract
A control circuit for controlling a power transistor is provided. The power transistor is coupled in series with a load, both coupled between an input power terminal and a reference ground. The control circuit controls the conduction state of the power transistor based on a dimming signal, and when a representative value of the dimming signal is higher than a first threshold, the control circuit regulates the amplitude of the current flowing through the power transistor, and when the representative value of the dimming signal is lower than a second threshold, the control circuit regulates the time of the current flowing through the power transistor, and wherein the second threshold is not higher than the first threshold.