Title:
SWITCHING POWER SUPPLY SYSTEM DEVICE COMPRISING PLANAR-ARRAY INDUCTOR
Document Type and Number:
WIPO Patent Application WO/2024/090418
Kind Code:
A1
Abstract:
A switching power supply system device (80) comprises: a power conversion unit in which a plurality of power conversion circuits (81-84) are connected in parallel, each performing a switching operation, and that obtains an output voltage by combining outputs of the switching operations; a switching control circuit (800) that controls the switching operations; and a planar-array inductor (10) that constitutes a power inductor for the plurality of power conversion circuits (81-84). The planar-array inductor (10) comprises a magnetic body (100), and a plurality of winding wires formed in an array with respect to the magnetic body (100). Each of the plurality of winding wires is composed of a plurality of layers of copper-foil wires that are laminated with a non-magnetic and non-conducting adhesive layer (ADH) therebetween, the copper-foil wires that are adjacent to each other among the plurality of copper foil wires being electrically connected by means of an inter-layer via conductor. The magnetic body (100) is obtained by press-fitting and heat-curing sheets of magnetic material on the inside and outside of the plurality of winding wires, and is shaped to cover the plurality of winding wires. The switching control circuit (800) periodically changes a current peak value that flows through the plurality of winding wires during the switching operation period.
Inventors:
HOSOTANI TATSUYA (JP)
Application Number:
PCT/JP2023/038301
Publication Date:
May 02, 2024
Filing Date:
October 24, 2023
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H01F37/00; H01F27/255; H01F27/28; H01F27/29; H02M3/155
Domestic Patent References:
| WO2019208004A1 | 2019-10-31 |
Foreign References:
| JP2011054585A | 2011-03-17 | |||
| JP2019121780A | 2019-07-22 | |||
| US5877668A | 1999-03-02 |
Attorney, Agent or Firm:
KAEDE PATENT ATTORNEYS' OFFICE (JP)
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