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Low-profile coupled inductors with leakage control

An inductor, low-profile technology, applied in the direction of transformer/inductor core, transformer/inductor parts, electrical components, etc., can solve the problem that discrete inductors are expensive, coupled inductors have not gained a large market share, Coupled sensors are not widely used, etc.

Active Publication Date: 2018-01-02
MAXIM INTEGRATED PROD INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, coupled inductors have not gained a large market share in low profile applications
In addition, conventional coupled inductors are generally more expensive than discrete inductors of similar nature, so coupled inductors are not widely used in low current applications, i.e., less than 10 amps per phase

Method used

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  • Low-profile coupled inductors with leakage control
  • Low-profile coupled inductors with leakage control
  • Low-profile coupled inductors with leakage control

Examples

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Embodiment Construction

[0041] The present applicants have developed low profile coupled inductors that have at least the potential to overcome one or more of the above-mentioned disadvantages of conventional coupled inductors. Certain embodiments of the low-profile coupled inductor have a profile of less than 1mm, so they are potentially suitable for use in applications with stringent low-profile requirements, such as mobile phone and tablet applications. In addition, certain embodiments of the low profile coupled inductor allow windings to be wound directly on the magnetic core, thereby improving manufacturing simplicity, reducing manufacturing cost, reducing material cost, and ease of forming multiple turns. Furthermore, the low profile coupled inductor advantageously allows adjustment of leakage inductance substantially independently of magnetizing inductance during coupled inductor design and / or fabrication.

[0042] figure 1 A perspective view of a low profile coupled inductor 100 with leakage...

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PUM

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Abstract

A low-profile coupled inductor includes a magnetic core and first and second windings. The magnetic core includes first and second end flanges, a winding form element, a first outer plate, and a firstleakage post. The winding form element is disposed between and connects the first and second end flanges in a first direction. The first outer plate is disposed over and faces the first and second end flanges in a second direction. The first leakage post is disposed between the winding form element and the first outer plate in the second direction. The first winding is wound around the winding form element, between the first end flange and the first leakage post, and the second winding is wound around the winding form element, between the first leakage post and the second end flange. Each ofthe windings is wound around a common axis extending in the first direction.

Description

[0001] related application [0002] This application claims the benefit of priority to US Provisional Patent Application No. 62 / 120,264, filed February 24, 2015, which is incorporated herein by reference. Background technique [0003] Mobile electronic devices such as mobile phones and tablet computers require extensive power management circuitry. For example, mobile electronic devices often include multiple switching power converters such as those used to control battery charging and to provide point-of-load regulation for processors and other integrated circuits. Power management circuits typically occupy a substantial portion of the volume of a mobile electronic device, for example, up to 40%. [0004] Switching power converters typically include one or more inductors to store energy in magnetic form. For example, a buck DC-DC converter includes an inductor as part of an output filter to remove the AC component from the converter's switching waveform. Inductors are typic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F27/24H01F3/10
CPCH01F27/2823H01F27/306H01F27/346
Inventor M·W·巴克J·邱B·A·三和A·伊克里亚尼科夫
Owner MAXIM INTEGRATED PROD INC