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:
Oct. 08, 2024
Filed:
Sep. 28, 2022
Southchip Semiconductor Technology (Shanghai) Co., Ltd., Shanghai, CN;
Lin Feng, Shanghai, CN;
Jianlong Gao, Shanghai, CN;
Southchip Semiconductor Technology (Shanghai) Co., Ltd., Shanghai, CN;
Abstract
The present disclosure provides a power supply control circuit and control method for a switching power supply system. The control circuit includes: a power transistor and current sampling module, a voltage common collector (VCC) charging management module, a switch module, and a voltage regulator clamping module. The power transistor and current sampling module includes: a main switch high-voltage power transistor, a power transistor driver, an auxiliary sampling high-voltage transistor, and a current sampling resistor. The switch module includes a first switch, a second switch, a third switch, and a fourth switch. The present disclosure realizes time-division multiplexing and seamless transition through a reasonable timing of the switch module, thereby enabling multiplexing of high-voltage devices reducing demands for high-voltage processes, saving chip costs, and reducing design difficulty.