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. 01, 2018
Filed:
Sep. 01, 2014
SG Micro Corp, Beijing, CN;
Xiang Yu, Beijing, CN;
SG MICRO CORP., Beijing, CN;
Abstract
A single inductor positive and negative voltage output device, which not only reduces a chip area, but also meets mutual independent application needs of positive and negative voltage output load currents, which includes an inductor L, one end of the inductor L is connected to the drain of a first PMOS power switch Mand to the drain of a third NMOS power switch Mrespectively, the other end of the inductor L is connected to the drain of a second NMOS power switch Mand to the source of a fourth PMOS power switch Mrespectively, the gates of M, M, Mand Mare respectively connected to a drive circuit (), the source of Mis connected to a power supply terminal VIN, the source of Mis connected to a ground terminal (), the source of Mis connected to a negative voltage output end VON, the drain of Mis connected to a positive voltage output end VOP, the negative voltage output end VON is connected to ground terminal by a negative terminal capacitor CON, the positive voltage output end VOP is connected to ground terminal by a positive terminal capacitor COP, the positive voltage output end VOP by a positive terminal feedback circuit and the negative voltage output end VON by a negative terminal feedback are respectively connected to the drive circuit () by a logic control circuit ().