DC-DC CONVERTER, MODULE, POWER SUPPLY DEVICE AND ELECTRONIC APPARATUS

WIPO Patent Application WO/2011/001500

A1

A first switch (SW1) is turned on by a control section (CT1), and a direct current voltage applied from a power supply (BAT) is smoothed by a capacitor (C1) through a first inductor (L1) and is outputted from an output terminal (OUT1).  A second switch (SW2) and a third switch (SW3) are turned on substantially at the same time after a predetermined time after the first switch (SW1) is turned off by the control section (CT1).  A current flowing in the first inductor (L1) is branched to the second switch (SW2) and the third switch (SW3), and a current flowing in a parasitic diode (Dp1) of the second switch (SW2) is reduced.  Thus, when the second switch (SW2) is turned off, a recovery current flowing to the parasitic diode (Dp1) is reduced.

JP2020127274	POWER SUPPLY EQUIPMENT
JP2013034279	MULTI-PHASE CONVERTER CIRCUIT
JP5184937	Switching power supply

YONEZAWA YU (JP)
DEGUCHI HIDEAKI (JP)
NAKASHIMA YOSHIYASU (JP)

PCT/JP2009/061899

January 06, 2011

June 30, 2009

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FUJITSU LTD (JP)
YONEZAWA YU (JP)
DEGUCHI HIDEAKI (JP)
NAKASHIMA YOSHIYASU (JP)

H02M3/155; H01L25/07; H01L25/18

JP2007244156A	2007-09-20
JP2006345628A	2006-12-21
JP2008072872A	2008-03-27
JP2002044937A	2002-02-08
JP2008160951A	2008-07-10
JPS59195857A	1984-11-07
JP2002044937A	2002-02-08
JP2007252055A	2007-09-27

NOBUHIKO YAMASHITA: "Conduction Power Loss in MOSFET Synchronous Rectifier with Parallel-Connected Schottky Barrier Diode", IEEE TRANSACTIONS ON POWER ELECTRONICS, U.S., IEEE, June 1998 (1998-06-01), pages 667

KOHNO Takao (JP)
Takao Kono (JP)

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