JP2001112244A - Power supply unit - Google Patents
Power supply unitInfo
- Publication number
- JP2001112244A JP2001112244A JP28923099A JP28923099A JP2001112244A JP 2001112244 A JP2001112244 A JP 2001112244A JP 28923099 A JP28923099 A JP 28923099A JP 28923099 A JP28923099 A JP 28923099A JP 2001112244 A JP2001112244 A JP 2001112244A
- Authority
- JP
- Japan
- Prior art keywords
- electrolytic capacitors
- choke coil
- power supply
- electrolytic
- terminal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Dc-Dc Converters (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、降圧チョッパ型の
電源装置における部品の実装構造に関する。The present invention relates to a component mounting structure in a step-down chopper type power supply device.
【０００２】[0002]
【従来の技術】高入力電圧から＋１２Ｖや＋５Ｖの低出
力電圧の直流電源を効率よく得るために、降圧チョッパ
型の電源装置がよく用いられ、降圧チョッパ用半導体デ
バイスとして例えば、松下電子工業製のＭＩＰ０２２１
ＳＵＬが知られている。このデバイスは外付け部品とし
て、デバイスを構成するスイッチング素子の出力側に第
一・第二の電解コンデンサとチョークコイルを必要と
し、第一の電解コンデンサの負極端子はスイッチング素
子の出力側に接続され、チョークコイルの入力側端子は
第１の電解コンデンサの負極端子に接続され、チョーク
コイルの出力側端子には第二の電解コンデンサの正極端
子が接続されるものである。2. Description of the Related Art A step-down chopper type power supply is often used to efficiently obtain a DC power supply having a low output voltage of +12 V or +5 V from a high input voltage. MIP0221
SUL is known. This device requires, as external components, first and second electrolytic capacitors and a choke coil on the output side of the switching element that constitutes the device, and the negative terminal of the first electrolytic capacitor is connected to the output side of the switching element. The input terminal of the choke coil is connected to the negative terminal of the first electrolytic capacitor, and the output terminal of the choke coil is connected to the positive terminal of the second electrolytic capacitor.
【０００３】[0003]
【発明が解決しようとする課題】このような電源装置に
おいては小型化のために、第一・第二の電解コンデンサ
を互いに近接して実装することを余儀なくされるが、第
一・第二の電解コンデンサの各々の負極端子間に高電位
差があるため、それらの実装には相当な注意を払う必要
がある。すなわち、電解コンデンサの外殻金属筒は負極
端子と同電位であり、外殻金属筒には一応、電気絶縁性
の外装スリーブが被されているものの、到底、高絶縁耐
圧を有するものではない。従って、第一・第二の電解コ
ンデンサが倒れて互いに接触すると、短絡事故が発生す
るおそれがある。そこで、本発明は、簡単な手段により
部品の実装スペースを高密度化できる降圧チョッパ型の
電源装置を提供することを目的とする。In such a power supply device, the first and second electrolytic capacitors must be mounted close to each other in order to reduce the size. Due to the high potential difference between each negative electrode terminal of the electrolytic capacitors, considerable care must be taken in their mounting. That is, the outer metal cylinder of the electrolytic capacitor has the same potential as the negative electrode terminal, and although the outer metal cylinder is temporarily covered with an electrically insulating outer sleeve, it does not have a high withstand voltage at all. Therefore, if the first and second electrolytic capacitors fall down and come into contact with each other, a short circuit accident may occur. Therefore, an object of the present invention is to provide a step-down chopper type power supply device capable of increasing the mounting space of components by simple means.
【０００４】[0004]
【課題を解決するための手段】請求項に示した通りであ
る。Means for solving the problems are as described in the claims.
【０００５】[0005]
【発明の実施の形態】次に、本発明の実施形態を説明す
るが、それはあくまで本発明に基づいて採択された例示
的な実施形態であり、本発明をその実施形態に特有な事
項に基づいて限定解釈してはならず、本発明の技術的範
囲は、請求項に示した事項さらにはその事項と実質的に
等価である事項に基づいて定めなければならない。BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of the present invention will be described. However, this is merely an exemplary embodiment adopted based on the present invention, and the present invention will be described based on matters unique to the embodiment. Therefore, the technical scope of the present invention should be determined based on the matters stated in the claims and matters substantially equivalent to the matters.
【０００６】図示の実施形態は、入力電圧Ｖｉｎを入力
電圧Ｖｉｎより低い出力電圧Ｖｏｕｔに変換する降圧チ
ョッパ型の電源装置である。降圧チョッパ用の半導体デ
バイス１として例えば、松下電子工業製のＭＩＰ０２２
１ＳＵＬが適当であり、入力電圧Ｖｉｎは半導体デバイ
ス１を構成するＭＯＳ−ＦＥＴからなるスイッチング素
子２の入力側Ｄに入力される。そして、スイッチング素
子２の出力側に第一・第二の電解コンデンサ３、４とチ
ョークコイル５を備え、第一の電解コンデンサ３の負極
端子はスイッチング素子２の出力側Ｓに接続され、チョ
ークコイル５の入力側端子は第一の電解コンデンサ３の
負極端子に接続され、チョークコイル５の出力側端子に
は第二の電解コンデンサ４の正極端子が接続される。The illustrated embodiment is a step-down chopper type power supply for converting an input voltage Vin to an output voltage Vout lower than the input voltage Vin. As the semiconductor device 1 for the step-down chopper, for example, MIP022 manufactured by Matsushita Electronics Corporation
1SUL is appropriate, and the input voltage Vin is input to the input side D of the switching element 2 composed of a MOS-FET constituting the semiconductor device 1. The output side of the switching element 2 includes first and second electrolytic capacitors 3 and 4 and a choke coil 5. The negative terminal of the first electrolytic capacitor 3 is connected to the output side S of the switching element 2, and the choke coil 5 is connected to the negative terminal of the first electrolytic capacitor 3, and the output terminal of the choke coil 5 is connected to the positive terminal of the second electrolytic capacitor 4.
【０００７】そして、第一・第二の電解コンデンサ３、
４をそれらの一対の端子３ａ、３ｂと４ａ、４ｂの並び
方向が互いに同一になるようにプリント基板６に互いに
近接して実装するとともに、外装を電気絶縁性としたチ
ョークコイル５を第一・第二の電解コンデンサ３、４の
間に位置するようにプリント基板６に実装している。ま
た、第一・第二の電解コンデンサ３、４の一対の端子３
ａ、３ｂと４ａ、４ｂの並び方向の延長上に第一・第二
の電解コンデンサ３、４に近接してケースなどを構成す
る金属板７が存在している。また、半導体デバイス１の
制御端子Ｃには第一の電解コンデンサ３の正極端子が接
続され、チョークコイル５の出力側端子は定電圧ダイオ
ード８とダイオード９を介して制御端子Ｃに接続され、
ダイオード１０はチョークコイル５の入力側端子と第二
の電解コンデンサ４の負極端子に接続される。Then, the first and second electrolytic capacitors 3,
4 is mounted on the printed circuit board 6 close to each other so that the arrangement direction of the pair of terminals 3a, 3b and 4a, 4b is the same as each other. It is mounted on the printed circuit board 6 so as to be located between the second electrolytic capacitors 3 and 4. Further, a pair of terminals 3 of the first and second electrolytic capacitors 3 and 4 are provided.
On the extension in the direction of arrangement of a, 3b and 4a, 4b, there is a metal plate 7 constituting a case or the like close to the first and second electrolytic capacitors 3, 4. The positive terminal of the first electrolytic capacitor 3 is connected to the control terminal C of the semiconductor device 1, the output terminal of the choke coil 5 is connected to the control terminal C via the constant voltage diodes 8 and 9,
The diode 10 is connected to the input terminal of the choke coil 5 and the negative terminal of the second electrolytic capacitor 4.
【０００８】このような電源装置においては小型化のた
めに、第一・第二の電解コンデンサ３、４を図１のよう
に互いに近接して実装することを余儀なくされるが、第
一・第二の電解コンデンサ３、４の各々の負極端子間に
相当な高電位差があるため、それらの実装には相当な注
意を払う必要がある。すなわち、第一・第二の電解コン
デンサ３、４の外殻金属筒３ｃ、４ｃは負極端子と同電
位であり、外殻金属筒３ｃ、４ｃには一応、電気絶縁性
の外装スリーブ３ｄ、４ｄが被されているものの、到
底、高絶縁耐圧を有するものではない。従って、第一・
第二の電解コンデンサ３、４が図１（Ｄ）のように倒れ
ても接触・短絡事故が発生することがないように、外装
を電気絶縁性としたチョークコイル５を第一・第二の電
解コンデンサ３、４の間に位置しているのである。ま
た、第一・第二の電解コンデンサ３、４に近接して金属
板７が存在しているが、第一・第二の電解コンデンサ
３、４の一対の端子３ａ、３ｂと４ａ、４ｂの並び方向
の延長上に存在するため、第一・第二の電解コンデンサ
３、４は金属板７側に倒れて接触することはない。In such a power supply device, it is necessary to mount the first and second electrolytic capacitors 3 and 4 close to each other as shown in FIG. Since there is a considerable high potential difference between the respective negative terminals of the two electrolytic capacitors 3 and 4, considerable care must be taken in their mounting. That is, the outer metal shells 3c and 4c of the first and second electrolytic capacitors 3 and 4 have the same potential as the negative electrode terminal, and the outer metal shells 3c and 4c are temporarily provided with the electrically insulating outer sleeves 3d and 4d. However, it does not have a high withstand voltage at all. Therefore, the first
The first and second choke coils 5 are provided with an electrically insulating exterior so that the contact / short circuit does not occur even if the second electrolytic capacitors 3 and 4 fall down as shown in FIG. It is located between the electrolytic capacitors 3 and 4. Although the metal plate 7 exists near the first and second electrolytic capacitors 3 and 4, the pair of terminals 3 a and 3 b of the first and second electrolytic capacitors 3 and 4 and 4 a and 4 b Since the first and second electrolytic capacitors 3 and 4 are present on the extension in the arrangement direction, the first and second electrolytic capacitors 3 and 4 do not fall down and contact the metal plate 7 side.
【図１】（Ａ）本発明の実施形態を示す平面図 （Ｂ）同正面図 （Ｃ）同側面図 （Ｄ）同電解コンデンサが倒れた状態の正面図1A is a plan view showing an embodiment of the present invention, FIG. 1B is a front view, FIG. 1C is a side view, and FIG.
【図２】同回路ブロック図FIG. 2 is a block diagram of the same circuit.
Ｖｉｎ 入力電圧 Ｖｏｕｔ 出力電圧 ２ スイッチング素子 ３ 第一の電解コンデンサ ４ 第二の電解コンデンサ ５ チョークコイル ６ プリント基板 ７ 金属板 Vin Input voltage Vout Output voltage 2 Switching element 3 First electrolytic capacitor 4 Second electrolytic capacitor 5 Choke coil 6 Printed circuit board 7 Metal plate
Claims (2)
変換する降圧チョッパ型の電源装置において、スイッチ
ング素子の出力側に第一・第二の電解コンデンサとチョ
ークコイルを備え、第一の電解コンデンサの負極端子は
スイッチング素子の出力側に接続され、チョークコイル
の入力側端子は第１の電解コンデンサの負極端子に接続
され、チョークコイルの出力側端子には第二の電解コン
デンサの正極端子が接続され、第一・第二の電解コンデ
ンサをそれらの一対の端子の並び方向が互いに同一にな
るようにプリント基板に互いに近接して実装するととも
に、外装を電気絶縁性としたチョークコイルを第一・第
二の電解コンデンサの間に位置するようにプリント基板
に実装した電源装置。1. A step-down chopper-type power supply device for converting an input voltage to an output voltage lower than the input voltage, wherein a first and second electrolytic capacitors and a choke coil are provided on an output side of a switching element, and the first electrolytic capacitor is provided. The negative terminal of is connected to the output side of the switching element, the input terminal of the choke coil is connected to the negative terminal of the first electrolytic capacitor, and the positive terminal of the second electrolytic capacitor is connected to the output terminal of the choke coil. The first and second electrolytic capacitors are mounted close to each other on a printed circuit board so that the arrangement direction of the pair of terminals is the same as each other. A power supply device mounted on a printed circuit board so as to be located between the second electrolytic capacitors.
ンデンサの一対の端子の並び方向の延長上に第一・第二
の電解コンデンサに近接して金属板が存在する電源装
置。2. The power supply device according to claim 1, wherein a metal plate exists close to the first and second electrolytic capacitors on an extension in a direction in which the pair of terminals of the first and second electrolytic capacitors are arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28923099A JP3494601B2 (en) | 1999-10-12 | 1999-10-12 | Power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28923099A JP3494601B2 (en) | 1999-10-12 | 1999-10-12 | Power supply |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001112244A true JP2001112244A (en) | 2001-04-20 |
| JP3494601B2 JP3494601B2 (en) | 2004-02-09 |
Family
ID=17740480
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28923099A Expired - Fee Related JP3494601B2 (en) | 1999-10-12 | 1999-10-12 | Power supply |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3494601B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1294601C (en) * | 2002-03-26 | 2007-01-10 | 株式会社村田制作所 | Nounting structure of two-terminal capacitor and three-terminal capacitor |
-
1999
- 1999-10-12 JP JP28923099A patent/JP3494601B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1294601C (en) * | 2002-03-26 | 2007-01-10 | 株式会社村田制作所 | Nounting structure of two-terminal capacitor and three-terminal capacitor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3494601B2 (en) | 2004-02-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |