Anthony J Long

US Patent:

20130223120, Aug 29, 2013

Filed:

Feb 28, 2013

Appl. No.:

13/780920

Inventors:

Anthony LONG - Marlborough MA, US

Assignee:

MURATA MANUFACTURING CO., LTD. - Nagaokakyo-shi

International Classification:

H02M 7/06

US Classification:

363126

Abstract:

A power stage includes an input voltage source; an inductor including first and second windings, where the first winding is connected to the input voltage source and where the second winding is magnetically coupled to the first winding; an output capacitor; a first diode connected to the first winding; a second diode connected between the second winding and the output capacitor; a boost switch connected to the first winding; and a control switch connected between the first diode and the output capacitor. The control switch is arranged to actively control inrush current during start-up of the power stage. A method of controlling inrush current of a boost power stage includes actively controlling the inrush current of the power stage by controlling a control switch through which the inrush current during start-up flows.