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:
Apr. 09, 2013
Filed:
May. 26, 2010
Xiaodong Zhan, Plano, TX (US);
Zhixiang Liang, San Ramon, CA (US);
Xiangxu Yu, Shenzhen, CN;
Intersil Americas Inc., Milpitas, CA (US);
Abstract
A power supply including an AC input, a filter, a full wave rectifier, a converter, a second rectifier, and a bias system. The filter includes at least one differential capacitor coupled to the AC input. The full wave rectifier develops a DC bus voltage on a DC bus node. The converter includes a controller and operates to convert the DC bus voltage to a regulated output voltage. The second rectifier is coupled to the AC input for developing a DC bias voltage on a DC bias node. The bias system is coupled between the DC bias node and a reference node and provides at least one start-up voltage to the controller, such as a supply voltage or a sense voltage or the like. The bias circuit includes at least one current discharge path for discharging each differential capacitor within a predetermined time period when AC line voltage is removed.