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:
Dec. 02, 2025
Filed:
Oct. 30, 2023
Huawei Digital Power Technologies Co., Ltd., Shenzhen, CN;
Ken Chin, Shenzhen, CN;
Yuanjun Liu, Shenzhen, CN;
Shanglin Mo, Dongguan, CN;
Liangyun Kang, Shenzhen, CN;
Huawei Digital Power Technologies Co., Ltd., Shenzhen, CN;
Abstract
A power supply apparatus includes a totem-pole power factor correction (PFC) circuit and a control apparatus, and the totem-pole PFC circuit includes a first switching transistor and a second switching transistor. The control apparatus includes a controller and a dead time detection circuit, and the dead time detection circuit includes a detection capacitor and a detection resistor. A first end of the detection capacitor is connected to a first reference point, a second end of the detection capacitor is connected to a first end of the detection resistor, and a second end of the detection resistor is grounded. The controller is configured to, respectively, control an on/off status of the first switching transistor and an on/off status of the second switching transistor based on a voltage of the detection resistor and polarity of a voltage input by an alternating current input source.