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Multi-channel dc-dc converter

A DC-DC, multi-channel technology, applied in the direction of output power conversion devices, instruments, electric solid-state devices, etc., to achieve the effect of noise suppression

Active Publication Date: 2016-08-03
MURATA MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, usually, the Vout terminals of the switching ICs are collected in one place

Method used

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  • Multi-channel dc-dc converter
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  • Multi-channel dc-dc converter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] figure 1 (A) is a plan view of the multi-channel DC-DC converter according to the embodiment of the present invention (a view showing the principal surface of the laminate), figure 1 (B) is a cross-sectional view of a part where a coil conductor is formed in a laminated body.

[0017] figure 2 is a circuit diagram when the multi-channel DC-DC converter of this embodiment is a step-down DC-DC converter, image 3 It is a circuit diagram when the multi-channel DC-DC converter of this embodiment is a step-up DC-DC converter.

[0018] Such as figure 1 (A) and figure 1 As shown in (B), in the multi-channel DC-DC converter 1 of this embodiment, a switch IC 3 , capacitors, etc. ( figure 1 not shown in the figure) converters made of electronic components. The laminated body 2 includes a magnetic body (magnet) layer. For example, by providing a coil conductor between the laminated sheets, an inductor coil connected in the stacking direction is formed, thereby realizing a D...

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PUM

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Abstract

Provides multi-channel DC-DC converters that minimize radiated noise. Among the coil conductors constituting a plurality of channels, the wiring between the coil conductor of the channel with the smallest load current and the switch IC is made the longest, so that the channel with the smallest load current can be used for the wiring that is most likely to radiate noise, thereby Keep radiated noise to a minimum. In addition, it is preferable that among the plurality of coil conductors, the connection wiring connected to the coil conductor with the largest load current be the shortest. In this case, the channel with the largest load current can be used for the wiring that is least likely to radiate noise, so that radiated noise can be suppressed more.

Description

technical field [0001] This invention relates to a DC-DC converter equipped with switching elements, and more particularly to a multi-channel DC-DC converter. Background technique [0002] Conventionally, it is known that a DC-DC converter is realized by forming a coil pattern inside a magnetic substrate and mounting a switch IC on top of the magnetic substrate (for example, refer to Patent Document 1). [0003] In addition, there is also known a technique in which a plurality of coils are formed inside a single magnetic substrate to constitute a multi-channel DC-DC converter (for example, refer to Patent Document 2). [0004] Patent Document 1: International Publication No. 2008 / 087781 [0005] Patent Document 2: Japanese Patent Laid-Open No. 2004-343976 [0006] In the above-mentioned DC-DC converter, the connection between the Vout terminal and the coil of the switching IC is most likely to be affected by noise, so it is preferable to keep the wiring between the Vout te...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/155H02M1/00
CPCH02M1/44H02M3/1584H02M7/003H01L2924/0002H02M1/009H02M3/003H01L2924/00H02M3/155H01L23/5383
Inventor 樋江井智庆
Owner MURATA MFG CO LTD