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:
Mar. 06, 2012
Filed:
Jul. 30, 2008
Applicant:
Laszlo Balogh, Merrimack, NH (US);
Inventor:
Laszlo Balogh, Merrimack, NH (US);
Assignee:
Fairchild Semiconductor Corporation, South Portland, ME (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05F 1/10 (2006.01);
U.S. Cl.
CPC ...
Abstract
In one embodiment, circuitry is provided for startup of a power converter. The circuitry includes a bias capacitor operable to be charged for providing energy to a controller of the power converter. A divider circuit is coupled to a voltage source. Current flows through the divider circuit. A switch, coupled to the divider circuit, is operable to be turned on and off to divert current flow in the divider circuit for charging the bias capacitor. This provides energy to the controller of the power converter at startup without employing an external bias source or high value bleeder resistor.