JPS62239865A - Switching power unit - Google Patents
Switching power unitInfo
- Publication number
- JPS62239865A JPS62239865A JP8210586A JP8210586A JPS62239865A JP S62239865 A JPS62239865 A JP S62239865A JP 8210586 A JP8210586 A JP 8210586A JP 8210586 A JP8210586 A JP 8210586A JP S62239865 A JPS62239865 A JP S62239865A
- Authority
- JP
- Japan
- Prior art keywords
- constant
- coupler
- photo
- voltage
- current
- 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.)
- Pending
Links
- 238000001514 detection method Methods 0.000 claims abstract description 28
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 241001233037 catfish Species 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
Landscapes
- Dc-Dc Converters (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、入出力絶縁形スイッチング電源に係り、特に
出力側の定電圧検出および定電流検出の２信号を簡便に
入力側へ伝達するのに好適な回路に関する。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an input/output isolated switching power supply, and particularly to a method for easily transmitting two signals of constant voltage detection and constant current detection on the output side to the input side. The present invention relates to a circuit suitable for.
第３図は、電源装置の構成例であり次のような動作を行
っている。入力直流電圧または交流の整流平滑された電
圧１の負荷側には主スイツチング回路２があり、入力電
圧１はスイッチングされた電圧に変換される。その電力
をトランス３０２次側整流平滑回路４によりとり出し負
荷５へ供給している。定電圧制御および定電流制御は次
のように行われる。検出回路６にてそれぞれ誤差検出し
、フォトカブラ７により１次側へ伝達され、ドライブ回
路８かも主スイツチング回路２へ制御されたドライブ信
号が送られｊｉｉｌｌ ｉｉ！ｌされ安定化される。FIG. 3 shows an example of the configuration of the power supply device, which performs the following operations. There is a main switching circuit 2 on the load side of the input DC voltage or AC rectified and smoothed voltage 1, and the input voltage 1 is converted into a switched voltage. The power is taken out by the rectifying and smoothing circuit 4 on the secondary side of the transformer 30 and is supplied to the load 5. Constant voltage control and constant current control are performed as follows. Each error is detected by the detection circuit 6, transmitted to the primary side by the photocoupler 7, and a controlled drive signal is sent to the drive circuit 8 and the main switching circuit 2. jiill ii! stabilized.
＠４図は従来の検出回路例である。定電圧検出は次のよ
うに行われる。誤差検出はシャントレギュレータ９によ
り行い、その出力をフォトカプラｌＯにて１次側へ伝達
する。定電流噴出はオペアンプ１１により低抵抗１２０
発生電圧をフォトカブラ１３に送り１次側へ伝達してい
る。このように従来は負荷ＩＩ！流と負荷電圧を何個に
検出し、出力電力を安定化するためのフィードパンク信
号を得ていた。@Figure 4 is an example of a conventional detection circuit. Constant voltage detection is performed as follows. Error detection is performed by a shunt regulator 9, and its output is transmitted to the primary side by a photocoupler IO. Constant current injection is low resistance 120 by operational amplifier 11
The generated voltage is sent to the photocoupler 13 and transmitted to the primary side. In this way, conventionally Load II! The current and load voltage were detected and a feed puncture signal was obtained to stabilize the output power.
上記従来技術は出力側の検出信号を１次側へ伝達するフ
ォトカブラが定電圧検出用、定電流検出用の２個必要と
なり１部品点数が多い。またフォトカブラは１次と２次
側を接続するため。The above conventional technology requires two photocouplers, one for constant voltage detection and one for constant current detection, for transmitting the detection signal on the output side to the primary side, resulting in a large number of parts. Also, the photocoupler is used to connect the primary and secondary sides.
安全および絶縁上フォトカブラが多いのは難点がある。For safety and insulation reasons, there are disadvantages to having so many photocouplers.
本発明の目的は、フォトカブラ１個にて検出回路を構成
することにある。An object of the present invention is to configure a detection circuit with one photocoupler.
上記目的は１個のフォトカブラに２つの検出回路の出力
を伝達させることで達成される。The above object is achieved by transmitting the outputs of two detection circuits to one photocoupler.
１個の７オトカブラに２つの検出回路の出力電流を流す
ことで行う。This is done by passing the output currents of the two detection circuits through one 7-point turntable.
以下１本発明の一実施例を第１図により説明する。 An embodiment of the present invention will be described below with reference to FIG.
定電圧検出は第４図の従来例と同様にフォトカブラ１０
と直列接続されたシャントレギュレータ９により誤差検
出され、フォトカブラ１０にて１次側へ伝達される。そ
の時、負荷回路中に接続した電流検出抵抗１２の電圧降
下を入力する定電流検出回路であるオペアンプ１１の出
力はＨレベルなのでこのオペアンプ１１の出力端とフォ
トカブラ１０に直列に接結ニジたシャントレギュレータ
９の接続点を結ぶダイオード１４ハオフしている。Constant voltage detection is performed using a photocoupler 10 as in the conventional example shown in Figure 4.
The error is detected by the shunt regulator 9 connected in series with the photocoupler 10, and transmitted to the primary side by the photocoupler 10. At that time, the output of the operational amplifier 11, which is a constant current detection circuit that inputs the voltage drop of the current detection resistor 12 connected in the load circuit, is at H level, so a shunt is connected in series to the output terminal of the operational amplifier 11 and the photocoupler 10. A diode 14 connecting the connection point of the regulator 9 is turned off.
この状態において負荷電流が増大しオペアンプ１１が動
作すると、オペアンプ１１の出力Ｎ圧は降下し、ダイオ
ード１４はオンし、フォトカブラ１０→ダイオード１４
→オペアンプの経路で電流が流れる。従って、フォトカ
ブラ１０はその定電流値に見合う動作を行うこととなる
。In this state, when the load current increases and the operational amplifier 11 operates, the output N voltage of the operational amplifier 11 drops, the diode 14 turns on, and the photocoupler 10 → diode 14
→Current flows in the path of the operational amplifier. Therefore, the photocoupler 10 performs an operation commensurate with its constant current value.
本実施例によれば６以上のように１個のフォトカブラに
て定電圧検出と定電流検出の両方が一次側へ伝達できる
。According to this embodiment, both constant voltage detection and constant current detection can be transmitted to the primary side with one photocoupler as shown in 6 or more.
また、第３図は同一出力での定電圧検出９足電流検出の
例であるが、第２図の構成図のように８本発明において
は一方が定電圧制御用、他方ｈ！−バッテリの充電用の
定電流制御であるような場合においても１個のフォトカ
ブラにてフィードバック信号が伝達できることとなる。In addition, although FIG. 3 is an example of constant voltage detection and current detection with nine pairs of the same output, in the present invention, one is for constant voltage control and the other h! - Even in the case of constant current control for battery charging, a single photocoupler can transmit a feedback signal.
なお１以上の実施例において、スイッチング電源の基本
部分について詳しい説明は行わなかったが、こねは従来
と同様、フォトカブラにより得られるフィードバック信
号を基に、スイッチング素子の発振周波数あるいはスイ
フチングのデー−ティ比などを調整するものである。In one or more embodiments, the basic parts of the switching power supply have not been explained in detail, but as in the past, the oscillation frequency of the switching element or the switching data is determined based on the feedback signal obtained by the photocoupler. This is used to adjust the ratio, etc.
本発明によれば、１個のフォトカブラにテ定電圧信号と
定電流信号の両方を１次側へ伝達できるので１部品削減
や１次−２次の絶縁、安全性を高める上で効果がある。According to the present invention, since both a constant voltage signal and a constant current signal can be transmitted to the primary side with one photocoupler, it is effective in reducing the number of parts, insulating the primary and secondary sides, and increasing safety. be.
第１図は本発明の一つの実施例の要部を説明するための
略契、第２図は本発明の他の実施例を説明するためのブ
ロック図、ｆ＄３図、第４図はそれぞれ従来のスイッチ
ング電源ｉａを説明するための図である。
１・・・入力電圧。
２・・主スイツチング回路。
１９．にラソス ｌ、２．針塙箪ｈＨ鯰５・・
・負荷、 ６・・・検出回路。
７ 、１０ 、１３・・フォトカブラ。
８・・ドライブ回路。
９・・・シャントレギュレータ。
１１・・オペアンプ、１２・・・電流検出抵抗。
１４・・・ダイオード。
、−Fig. 1 is a schematic diagram for explaining the main part of one embodiment of the present invention, Fig. 2 is a block diagram for explaining another embodiment of the invention, Fig. f$3, and Fig. 4 are FIG. 3 is a diagram for explaining a conventional switching power supply ia. 1...Input voltage. 2. Main switching circuit. 19. Lasos l, 2. Haribana HH catfish 5...
・Load, 6...detection circuit. 7, 10, 13... Photocabra. 8. Drive circuit. 9... Shunt regulator. 11... operational amplifier, 12... current detection resistor. 14...Diode. ,−
Claims (1)
び定電流検出信号をフォトカプラにて入力側へ伝達し、
それにより主回路を制御する方式において、定電圧検出
と定電流検出信号を同一のフォトカプラにて伝達するこ
とを特徴とするスイッチング電源装置。The input and output are insulated, and the constant voltage detection signal and constant current detection signal on the output side are transmitted to the input side using a photocoupler.
A switching power supply device in which a main circuit is controlled thereby, and the switching power supply device is characterized in that a constant voltage detection signal and a constant current detection signal are transmitted by the same photocoupler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8210586A JPS62239865A (en) | 1986-04-11 | 1986-04-11 | Switching power unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8210586A JPS62239865A (en) | 1986-04-11 | 1986-04-11 | Switching power unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62239865A true JPS62239865A (en) | 1987-10-20 |
Family
ID=13765130
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8210586A Pending JPS62239865A (en) | 1986-04-11 | 1986-04-11 | Switching power unit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62239865A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08182313A (en) * | 1994-07-21 | 1996-07-12 | Samsung Electro Mech Co Ltd | Switching mode power supply circuit with output voltage control and overcurrent protection function |
| EP1635446A1 (en) * | 2004-09-13 | 2006-03-15 | Power Integrations, Inc. | Compensation for parameter variations in a feedback circuit |
-
1986
- 1986-04-11 JP JP8210586A patent/JPS62239865A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08182313A (en) * | 1994-07-21 | 1996-07-12 | Samsung Electro Mech Co Ltd | Switching mode power supply circuit with output voltage control and overcurrent protection function |
| EP1635446A1 (en) * | 2004-09-13 | 2006-03-15 | Power Integrations, Inc. | Compensation for parameter variations in a feedback circuit |
| JP2006079612A (en) * | 2004-09-13 | 2006-03-23 | Power Integrations Inc | Compensation for parameter variation in feedback circuit |
| EP1926200A1 (en) * | 2004-09-13 | 2008-05-28 | Power Integrations, Inc. | Compensation for parameter variations in a feedback circuit |
| US7535735B2 (en) | 2004-09-13 | 2009-05-19 | Power Integrations, Inc. | Compensation for parameter variations in a feedback circuit |
| US7813150B2 (en) | 2004-09-13 | 2010-10-12 | Power Integrations, Inc. | Compensation for parameter variations in a feedback circuit |
| EP2315343A3 (en) * | 2004-09-13 | 2012-10-10 | Power Integrations, Inc. | Compensation for parameter variations in a feedback circuit |
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