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:
Feb. 27, 2018
Filed:
May. 06, 2016
Silergy Semiconductor Technology (Hangzhou) Ltd, Hangzhou, ZheJiang Province, CN;
Shaobin Zhang, Hangzhou, CN;
Zhiliang Hu, Hangzhou, CN;
Yongjiang Bai, Hangzhou, CN;
Jin Jin, Hangzhou, CN;
Silergy Semiconductor Technology (Hangzhou) LTD, Hangzhou, CN;
Abstract
A power supply circuit for a switching power supply including a power switch configured to receive a DC input voltage, can include: a switching control circuit configured to receive a charge voltage signal of a charge capacitor, a reference voltage signal, and a PWM control signal, and to generate a switching control signal; a control unit having a supply voltage from the charge capacitor, where the charge capacitor includes a first terminal coupled to the switching control circuit, and a second terminal coupled to ground; and where when the switching power supply is in a start-up phase, the power switch is turned on, the first switch is turned off, and the DC input voltage charge the charges capacitor through the power switch, and the control unit begins operating when the charge voltage signal reaches a level of starting voltage of the control unit.