Title:
SWITCHING POWER SUPPLY DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/032732
Kind Code:
A1
Abstract:
This switching power supply device is provided with a circuit substrate (1) on which a plurality of inductor windings are formed, and common magnetic bodies mounted to both sides of the circuit substrate (1). The circuit substrate (1) includes common wiring that commonly electrically connects respective one ends of the plurality of inductor windings. The common magnetic bodies each includes an inner leg (4i) that is inserted to the inside of the plurality of inductor windings and an outer leg (4o) that is inserted to the outside of the plurality of inductor windings. A smoothing capacitor (Co0) connected between a common wiring (3E) and a ground wiring (7) is mounted on the circuit substrate (1), whereby a smoothing filter is configured with an inductance of the common wiring and the smoothing capacitor (Co0). The plurality of inductor windings are magnetically coupled to one another, while the common wiring and the plurality of inductor windings are substantially not magnetically coupled.
Inventors:
HOSOTANI TATSUYA (JP)
MIKI OSAMU (JP)
MIKI OSAMU (JP)
Application Number:
PCT/JP2022/031556
Publication Date:
March 09, 2023
Filing Date:
August 22, 2022
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H02M3/155; H01F17/00; H01F17/04; H01F27/00; H01F27/28; H01F37/00
Foreign References:
| US20070090915A1 | 2007-04-26 | |||
| JP2007194474A | 2007-08-02 | |||
| JP2015088668A | 2015-05-07 |
Attorney, Agent or Firm:
KAEDE PATENT ATTORNEYS' OFFICE (JP)
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