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:
Jun. 08, 2010
Filed:
Jul. 23, 2007
Wenkai Wu, East Greenwich, RI (US);
George Schuellein, Narragansett, RI (US);
Wenkai Wu, East Greenwich, RI (US);
George Schuellein, Narragansett, RI (US);
International Rectifier Corporation, El Segundo, CA (US);
Abstract
A circuit for preventing inductor saturation during a step-up load transient in a multi-phase converter circuit where phases are turned ON sequentially by a shared clock signal with a fixed phase shift, each phase having high- and low-side switches series connected at a switching node, the circuit including at least one closed loop connected to at least one phase for providing ripple current cancellation in input and output sides of the multi-phase converter circuit; an oscillator circuit for providing a signal to turn ON and OFF the high- and low-side switches of each of the phases of the multi-phase converter circuit; and a detection circuit to detect the transient. The detect circuit includes an error amplifier circuit to receive input signals from an output of the multi-phase converter and to provide an error signal; and a clock oscillator frequency changing circuit receiving the error signal for increasing the clock oscillation frequency when said detection circuit detects a step-up load transient.