JP2008092653A - Dc-dc converter - Google Patents
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- JP2008092653A JP2008092653A JP2006270152A JP2006270152A JP2008092653A JP 2008092653 A JP2008092653 A JP 2008092653A JP 2006270152 A JP2006270152 A JP 2006270152A JP 2006270152 A JP2006270152 A JP 2006270152A JP 2008092653 A JP2008092653 A JP 2008092653A
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Abstract
Description
本発明は、電子機器の負荷部分に安定なＤＣ電力を供給できるＤＣ−ＤＣコンバータを提供するものである。 The present invention provides a DC-DC converter that can supply stable DC power to a load portion of an electronic device.
電子機器の軽量小型化が進み、それに伴い電源も小型化、特に薄型化が進められている。電子機器の多くは商用電源の他、バッテリーでも動作するように設計されている。電源部分にはＤＣ−ＤＣコンバータが組み込まれ、所定の電圧のＤＣを必要電圧のＤＣに変換後、負荷部分に供給している。 As electronic devices are becoming lighter and smaller, power supplies are becoming smaller, especially thinner. Many electronic devices are designed to operate on batteries as well as commercial power sources. A DC-DC converter is incorporated in the power supply part, and after a predetermined voltage DC is converted to a required voltage DC, it is supplied to the load part.
最近、ＤＣ−ＤＣコンバータは本体基板に組み込まれるオンボード型になってきた。オンボード型ＤＣ−ＤＣコンバータは一般に下面に複数の端子を有しており、本体基板に予め設けられた回路端子にハンダ付け等により電気的に接続されている。
オンボード型ＤＣ−ＤＣコンバータの１例として、従来、基板の下面に回路部品を配設するとともに、基板の上面に膜抵抗体を配設し、その上に巻線を施したフェライトコアを搭載した構造のものが知られている（例えば、特許文献１）
As an example of an on-board type DC-DC converter, conventionally, a circuit core is disposed on the lower surface of the substrate, a film resistor is disposed on the upper surface of the substrate, and a ferrite core with windings thereon is mounted. The thing of the structure which was made is known (for example, patent document 1)
ＤＣ−ＤＣコンバータの回路には、チョークコイル等のインダクタやトランス等、並びに面実装回路部品が用いられる。このうちインダクタは、従来焼結フェライトコアに巻線を施した巻線方式のものが用いられている。予め電気回路を形成した回路基板上に装着され、フローないしリフロー半田で接着して搭載される。 In the circuit of the DC-DC converter, an inductor such as a choke coil, a transformer, and surface mount circuit components are used. Of these, a conventional winding type is used in which a sintered ferrite core is wound. It is mounted on a circuit board on which an electric circuit is formed in advance, and is mounted by bonding with flow or reflow solder.
上述の巻線方式のインダクタは、求められる磁気飽和特性や、入力電流に対する焼損防止の必要性から、インダクタの小型化には限界がある。このため、ＦＥＴやダイオード等の電子部品とともに基板に実装した場合には、それぞれの部品が一定の実装面積を必要とするため、実装面積を小さくすることは困難であった。 The above-described winding type inductor has a limit to downsizing the inductor because of the required magnetic saturation characteristics and the necessity of preventing burning against the input current. For this reason, when mounted on a substrate together with electronic components such as FETs and diodes, it is difficult to reduce the mounting area because each component requires a certain mounting area.
本発明の技術的課題は（目的）は、基板実装面積の小さいＤＣ−ＤＣコンバータを提供しようとするものである。 The technical problem of the present invention is to provide a DC-DC converter having a small board mounting area.
上記課題を解決するため、本発明のＤＣ−ＤＣコンバータは、足部を有する一体成形されたコアに、前記足部以外の箇所に溝部を形成し、前記溝部に銅線を巻回してコイル巻線部としたインダクタと、前記コアの足部で囲まれるように回路基板上に設置されたスイッチング素子制御ＩＣからなることを特徴とする。 In order to solve the above-mentioned problems, a DC-DC converter according to the present invention is formed by forming a groove portion in a portion other than the foot portion in an integrally formed core having a foot portion, and winding a copper wire around the groove portion to form a coil. It comprises an inductor as a line part and a switching element control IC installed on a circuit board so as to be surrounded by the leg part of the core.
また、本発明のＤＣ−ＤＣコンバータは、前記コアの両側面に金属端子板が接合されたことを特徴としている。 The DC-DC converter of the present invention is characterized in that metal terminal plates are joined to both side surfaces of the core.
本発明は、足部を有する一体成形されたコアに、前記足部以外の箇所に溝部を形成し、前記溝部に銅線を巻回してコイル巻線部としたインダクタと、前記コアの足部で囲まれるように回路基板上に設置されたスイッチング素子制御ＩＣとコイルを回路基板に固定したＤＣ−ＤＣコンバータである。
発明のＤＣ−ＤＣコンバータのチョークコイルとして求められる磁気飽和特性等を実現するため、インダクタの小型化は困難であるが、このように、ＤＣ−ＤＣコンバータとして必要なスイッチング素子制御ＩＣの上に、小型化が困難なインダクタを重なるように配置したため、基板実装面積の小さいＤＣ−ＤＣコンバータを提供することができる。
The present invention provides an inductor formed as a coil winding portion by forming a groove portion in a portion other than the foot portion in an integrally formed core having a foot portion, and winding a copper wire around the groove portion, and a foot portion of the core A DC-DC converter in which a switching element control IC and a coil installed on the circuit board are fixed to the circuit board so as to be surrounded by
In order to achieve the magnetic saturation characteristics required as a choke coil of the DC-DC converter of the invention, it is difficult to reduce the size of the inductor. Thus, on the switching element control IC necessary for the DC-DC converter, Since the inductors that are difficult to downsize are arranged so as to overlap, a DC-DC converter having a small board mounting area can be provided.
また、前記コアの両側面に金属端子板を接合したことにより、小型化してコアの強度が不足する場合に、金属端子板の強度でコアを補強できることからさらに好ましい。 In addition, it is further preferable that the metal terminal plate is bonded to both side surfaces of the core, so that the core can be reinforced with the strength of the metal terminal plate when the core is not sufficiently strong.
以下に実施例を挙げ、本発明のＤＣ−ＤＣコンバータについて図面を用いて詳細に説明する。 Hereinafter, examples will be given and the DC-DC converter of the present invention will be described in detail with reference to the drawings.
図１は、本発明におけるＤＣ−ＤＣコンバータの斜視図を示し、図２は本発明の断面図を示す。 FIG. 1 shows a perspective view of a DC-DC converter according to the present invention, and FIG. 2 shows a sectional view of the present invention.
まず、足部８を有する一体成形されたコア１を形成する。
次に、コア１の前記足部８以外の箇所に溝部７を形成し、その溝部７に被覆銅線を巻回してコイル巻線部３を形成する。
さらに、コア１の両側面に金属端子板２をそれぞれ接着剤６で接合する。
次に、コイル巻線部３の末端部をそれぞれ金属端子板２に半田等で接合し、インダクタを形成する。
First, the integrally formed core 1 having the foot 8 is formed.
Next, the groove portion 7 is formed at a location other than the foot portion 8 of the core 1, and the coated copper wire is wound around the groove portion 7 to form the coil winding portion 3.
Further, the metal terminal plates 2 are joined to the both side surfaces of the core 1 with an adhesive 6 respectively.
Next, the end portions of the coil winding portions 3 are respectively joined to the metal terminal plate 2 with solder or the like to form inductors.
次に、コア１の外形と同等または同等以下の外形を有するスイッチング素子制御ＩＣ４をコア１の足部８の間に囲むようにして、スイッチング素子制御ＩＣ４とインダクタの金属端子板２を電気配線９により回路が形成された回路基板５に半田等で接合し、本発明のインダクタをチョークコイルとしたＤＣ−ＤＣコンバータが作成される。 Next, the switching element control IC 4 having an outer shape equal to or less than or equal to the outer shape of the core 1 is enclosed between the legs 8 of the core 1, and the switching element control IC 4 and the metal terminal plate 2 of the inductor are connected by the electric wiring 9 A DC-DC converter using the inductor of the present invention as a choke coil is created by joining to the circuit board 5 on which is formed.
インダクタ用のコア１は、Ｎｉ−Ｚｎ系フェライトコアを焼結法により作成した。コア１の外形は、（高さ）１．６mm×（幅）２．６mm×（長さ）３．２mmである。
次に、巻線部分をダイヤモンドカッタで溝幅が０．３mmで溝加工して作成した。この溝部７に絶縁被覆銅線φ０．１mmを１２回巻線し、コイル外径がφ２．５mmのコイル巻線部３とした。
The inductor core 1 was formed by sintering a Ni—Zn ferrite core. The outer shape of the core 1 is (height) 1.6 mm × (width) 2.6 mm × (length) 3.2 mm.
Next, the winding portion was formed by grooving with a diamond cutter with a groove width of 0.3 mm. An insulation-coated copper wire φ0.1 mm was wound 12 times around the groove 7 to form a coil winding portion 3 having a coil outer diameter of φ2.5 mm.
次に、厚みが０．１mmの錫メッキ銅合金板をコの字状に折り曲げて金属端子板２とし、コア１の足部を有する両側面に、金属端子板２をエポキシ接着剤６により貼り付けて端子電極とした。
その後、コイル巻線３の末端部をそれぞれの端子電極に半田付けし、インダクタとした。
Next, a tin-plated copper alloy plate having a thickness of 0.1 mm is bent into a U-shape to form a metal terminal plate 2, and the metal terminal plate 2 is attached to both side surfaces of the core 1 having the legs with an epoxy adhesive 6. A terminal electrode was attached.
Thereafter, the end portions of the coil windings 3 were soldered to the respective terminal electrodes to form inductors.
スイッチング素子制御ＩＣ４は、ドライバトランスを内蔵した同期整流降圧型のＩＣチップ（ＴＯＲＥＸ製；型番ＸＣ９２２５）を使用し、電気回路が配線された回路基板に適正位置に接合した。
また、このようなスイッチング素子制御ＩＣは、コイルが外付けで必要な仕様となっている。
The switching element control IC 4 uses a synchronous rectification step-down IC chip (manufactured by TOREX; model number XC9225) with a built-in driver transformer and is bonded to a circuit board on which an electric circuit is wired at an appropriate position.
In addition, such a switching element control IC has a specification that requires an external coil.
さらに、接合されたスイッチング素子制御ＩＣをインダクタで両脇から囲うように設置して回路基板に半田付けしてＤＣ−ＤＣコンバータを作成した。
外形は（高さ）２．３mm×（幅）３．０mm×（長さ）４．０mmである。
Further, the joined switching element control IC was installed so as to be surrounded by an inductor from both sides, and was soldered to the circuit board to produce a DC-DC converter.
The external shape is (height) 2.3 mm × (width) 3.0 mm × (length) 4.0 mm.
比較例として、スイッチング素子制御ＩＣをＦＥＴ、ダイオード及び抵抗等の電子部品で構成し、インダクタを電気回路等で接続して作成したＤＣ−ＤＣコンバータは、本発明とほぼ同特性を示しているが、回路基板の外形は（高さ）２mm×（幅）８mm×（長さ）１０mmであった。
As a comparative example, a DC-DC converter formed by configuring a switching element control IC with electronic components such as FETs, diodes and resistors and connecting an inductor with an electric circuit or the like shows substantially the same characteristics as the present invention. The outer shape of the circuit board was (height) 2 mm × (width) 8 mm × (length) 10 mm.
１ コア
２ 金属端子板
３ コイル巻線部
４ スイッチング素子制御ＩＣ
５ 回路基板
６ 接着剤
７ 溝部
８ 足部
９ 電気配線
DESCRIPTION OF SYMBOLS 1 Core 2 Metal terminal board 3 Coil winding part 4 Switching element control IC
5 Circuit board
6 Adhesive 7 Groove 8 Foot 9 Electrical wiring
Claims (2)
前記溝部に銅線を巻回してコイル巻線部としたインダクタと、
前記コアの足部で囲まれるように回路基板上に設置されたスイッチング素子制御ＩＣからなるＤＣ−ＤＣコンバータ。 In the integrally molded core having the foot portion, a groove portion is formed at a place other than the foot portion,
An inductor in which a copper wire is wound around the groove portion to form a coil winding portion;
A DC-DC converter comprising a switching element control IC installed on a circuit board so as to be surrounded by the legs of the core.
The DC-DC converter according to claim 1, wherein metal terminal plates are joined to both side surfaces of the core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006270152A JP2008092653A (en) | 2006-09-30 | 2006-09-30 | Dc-dc converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006270152A JP2008092653A (en) | 2006-09-30 | 2006-09-30 | Dc-dc converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2008092653A true JP2008092653A (en) | 2008-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2006270152A Pending JP2008092653A (en) | 2006-09-30 | 2006-09-30 | Dc-dc converter |
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| JP (1) | JP2008092653A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012109518A (en) * | 2010-10-26 | 2012-06-07 | Kyocera Corp | Inductor component and electronic device |
| JP2012174980A (en) * | 2011-02-23 | 2012-09-10 | Kyocera Corp | Inductor component and electronic device |
| JP2013098310A (en) * | 2011-10-31 | 2013-05-20 | Kyocera Corp | Inductor component and electronic apparatus |
| JP2015089333A (en) * | 2013-10-28 | 2015-05-07 | インフィネオン テクノロジーズ オーストリア アクチエンゲゼルシャフト | DC-DC converter assembly having an output inductor containing a power stage mounted on a circuit board |
| US10333407B2 (en) | 2015-05-06 | 2019-06-25 | Infineon Technologies Austria Ag | Power stage packages of a multi-phase DC-DC converter under a coupled inductor |
| US10855178B2 (en) | 2015-05-29 | 2020-12-01 | Infineon Technologies Austria Ag | Discrete power stage transistor dies of a DC-DC converter under an inductor |
| CN113645776A (en) * | 2016-11-17 | 2021-11-12 | Lg伊诺特有限公司 | DC-DC converter |
-
2006
- 2006-09-30 JP JP2006270152A patent/JP2008092653A/en active Pending
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012109518A (en) * | 2010-10-26 | 2012-06-07 | Kyocera Corp | Inductor component and electronic device |
| JP2012174980A (en) * | 2011-02-23 | 2012-09-10 | Kyocera Corp | Inductor component and electronic device |
| JP2013098310A (en) * | 2011-10-31 | 2013-05-20 | Kyocera Corp | Inductor component and electronic apparatus |
| KR101761069B1 (en) * | 2013-10-28 | 2017-07-24 | 인피니언 테크놀로지스 오스트리아 아게 | Dc-dc converter assembly with an output inductor accommodating a power stage attached to a circuit board |
| KR101734619B1 (en) * | 2013-10-28 | 2017-05-11 | 인피니언 테크놀로지스 오스트리아 아게 | Dc-dc converter assembly with an output inductor accommodating a power stage attached to a circuit board |
| US9711279B2 (en) | 2013-10-28 | 2017-07-18 | Infineon Technologies Austria Ag | DC-DC converter assembly with an output inductor accommodating a power stage attached to a circuit board |
| JP2015089333A (en) * | 2013-10-28 | 2015-05-07 | インフィネオン テクノロジーズ オーストリア アクチエンゲゼルシャフト | DC-DC converter assembly having an output inductor containing a power stage mounted on a circuit board |
| KR20170086438A (en) * | 2013-10-28 | 2017-07-26 | 인피니언 테크놀로지스 오스트리아 아게 | Dc-dc converter assembly with an output inductor accommodating a power stage attached to a circuit board |
| US9892851B2 (en) | 2013-10-28 | 2018-02-13 | Infineon Technologies Austria Ag | DC-DC converter assembly, method of manufacturing a DC-DC converter assembly and method of manufacturing an output inductor for a DC-DC converter assembly |
| KR101884570B1 (en) * | 2013-10-28 | 2018-08-01 | 인피니언 테크놀로지스 오스트리아 아게 | Dc-dc converter assembly with an output inductor accommodating a power stage attached to a circuit board |
| US10333407B2 (en) | 2015-05-06 | 2019-06-25 | Infineon Technologies Austria Ag | Power stage packages of a multi-phase DC-DC converter under a coupled inductor |
| US10855178B2 (en) | 2015-05-29 | 2020-12-01 | Infineon Technologies Austria Ag | Discrete power stage transistor dies of a DC-DC converter under an inductor |
| US11283356B2 (en) | 2015-05-29 | 2022-03-22 | Infineon Technologies North America Corp. | Method of assembling a DC-DC converter |
| CN113645776A (en) * | 2016-11-17 | 2021-11-12 | Lg伊诺特有限公司 | DC-DC converter |
| CN113645776B (en) * | 2016-11-17 | 2024-02-13 | Lg伊诺特有限公司 | DC-DC converter |
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