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:
Sep. 10, 2013
Filed:
Dec. 20, 2010
Da Liu, Milpitas, CA (US);
Da Liu, Milpitas, CA (US);
O2Micro, Inc., Santa Clara, CA (US);
Abstract
Embodiments of the invention provided a DC/DC converter. The DC/DC converter includes a transformer, a first controller and a first switch. The transformer has a primary winding coupled to a power source, a first secondary winding for providing a first output voltage and a second secondary winding for providing a second output voltage. The first controller is coupled to the primary winding for controlling input power to the primary winding to regulate the first output voltage. The switch is coupled to the second secondary winding and for regulating the second output voltage. The first switch is controlled by a pulse modulation signal. A current flows through the second secondary winding if the pulse modulation signal is in the first state, and the current flowing through the second secondary winding remains cut-off if the pulse modulation signal is in the second state.