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:
Jan. 22, 2019
Filed:
Apr. 16, 2015
Hangzhou Silan Microelectronics Co., Ltd., Hangzhou, Zhejiang, CN;
Haifeng Lin, Hangzhou, CN;
Shaohua Zhang, Hangzhou, CN;
Xianming Tang, Hangzhou, CN;
Feng Yao, Hangzhou, CN;
Yang Gao, Hangzhou, CN;
Dong Wang, Hangzhou, CN;
Hua Zhan, Hangzhou, CN;
Xianwei Yan, Hangzhou, CN;
Jianxing Wu, Hangzhou, CN;
HANGZHOU SILAN MICROELECTRONICS CO., LTD., Hangzhou, Zhejiang, CN;
Abstract
The present invention provides a switching power supply and a controller thereof, wherein the controller comprises: a switching power supply control device having a power supply terminal and detecting a voltage at the power supply terminal; a composite device integrating therein a power transistor and a depletion transistor, wherein the power transistor has a gate coupled to a first input, a source coupled to a first output, and a drain coupled to an input signal terminal; the depletion transistor has a gate coupled to a second input, a source coupled to a second output, and a drain coupled to the input signal terminal; the first input, the second input and the second output are coupled to the switching power supply control device, the first input receives a driving signal generated by the switching power supply control device, and the input signal terminal receives an input signal of the switching power supply. The power transistor and the depletion transistor in the composite device may be integrated within the same composite device. The present invention can shorten the startup time of the switching power supply, effectively reduce the standby power consumption, and also reduce the cost.