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. 12, 2013
Filed:
Jul. 10, 2009
Milorad Radovic, Vista, CA (US);
Milorad Radovic, Vista, CA (US);
Power-One, Inc., Camarillo, CA (US);
Abstract
A power supply includes circuitry for gradually enabling switching rectifiers during a startup condition without drawing current from a pre-biased power supply output. A driver provides a control signal to synchronous rectifier. A driver supply circuit is coupled across the driver and has a first input receiving pulse signals provided by a pulse modulation controller, an output providing supply voltage to the driver, a second input receiving driver supply input voltage, and circuitry defining a time constant. The circuitry includes a first switching element that turns on when pulse signals are provided and a second switching element connected to the output. The time constant is associated with a rise time for the power supply, and defined by selected component values, such that the second switching element only becomes fully conductive after elapsing of the time constant.