JPH03101185U - - Google Patents
Info
- Publication number
- JPH03101185U JPH03101185U JP724890U JP724890U JPH03101185U JP H03101185 U JPH03101185 U JP H03101185U JP 724890 U JP724890 U JP 724890U JP 724890 U JP724890 U JP 724890U JP H03101185 U JPH03101185 U JP H03101185U
- Authority
- JP
- Japan
- Prior art keywords
- output
- voltage
- winding
- transformer
- circuit
- 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
- 238000004804 winding Methods 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 5
- 238000009499 grossing Methods 0.000 claims description 3
- 239000003990 capacitor Substances 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Dc-Dc Converters (AREA)
Description
第１図はこの考案に係る多出力電源装置の一例
を示す電気回路図、第２図は同装置の要部の作用
説明図、第３図は従来の多出力電源装置の構成を
示す電気回路図である。
５……トランス、５ａ……入力巻線、５ｂ……
制御巻線、５ｃ，５ｄ……出力巻線、６……スイ
ツチング素子、９……制御回路、１９，３４……
整流素子、２０……平滑コンデンサ、２１……出
力電圧検出回路、２２……分圧回路、２８……第
１のフオトカプラ、３０……シヤントレギユレー
タ、３６……三端子レギユレータ、３９……保護
回路、４０……定電圧素子、４４……第２のフオ
トカプラ。
Fig. 1 is an electric circuit diagram showing an example of a multi-output power supply device according to this invention, Fig. 2 is an explanatory diagram of the operation of the main parts of the device, and Fig. 3 is an electric circuit diagram showing the configuration of a conventional multi-output power supply device. It is a diagram. 5...Transformer, 5a...Input winding, 5b...
Control winding, 5c, 5d... Output winding, 6... Switching element, 9... Control circuit, 19, 34...
Rectifying element, 20... Smoothing capacitor, 21... Output voltage detection circuit, 22... Voltage dividing circuit, 28... First photocoupler, 30... Shunt regulator, 36... Three terminal regulator, 39... ...Protection circuit, 40... Constant voltage element, 44... Second photocoupler.
Claims (1)
するトランスと、このトランスの入力巻線に直列
接続されたスイツチング素子と、上記トランスの
メイン出力巻線に生起した交流を整流する素子と
、この整流出力を平滑する平滑コンデンサに並列
接続される分圧回路ならびにこの分圧回路の分圧
電圧と内部基準電圧とを比較するシヤントレギユ
レータをもつた出力電圧検出回路と、上記トラン
スの他の出力巻線に生起した交流を整流する素子
と、この整流素子の出力側に接続された三端子レ
ギユレータと、上記制御巻線に接続され、出力電
圧検出回路の検出出力を第１のフオトカプラを介
して受けて上記スイツチング素子のＯＮ・ＯＦＦ
時間比を制御して出力電圧を一定に保持させる制
御回路とを備え、上記三端子レギユレータの入出
力電圧差が所定レベルを越えると導通する定電圧
素子を有し、該定電圧素子が導通状態になつた際
、上記出力電圧が低くなるように第２のフオトカ
プラを介して上記分圧回路の分圧電圧を低くさせ
る保護回路を上記三端子レギユレータに並列接続
したことを特徴とする多出力電源装置。 A transformer having an input winding, a control winding, and a plurality of output windings, a switching element connected in series to the input winding of the transformer, and an element for rectifying alternating current generated in the main output winding of the transformer; An output voltage detection circuit having a voltage dividing circuit connected in parallel to a smoothing capacitor for smoothing this rectified output and a shunt regulator for comparing the divided voltage of this voltage dividing circuit with an internal reference voltage, and an output voltage detection circuit of the above transformer. An element that rectifies the alternating current generated in the other output winding, a three-terminal regulator connected to the output side of this rectifying element, and a first photocoupler connected to the control winding to output the detection output of the output voltage detection circuit. ON/OFF of the above switching element is received via
and a control circuit that controls the time ratio to keep the output voltage constant, and has a constant voltage element that becomes conductive when the input/output voltage difference of the three-terminal regulator exceeds a predetermined level, and the constant voltage element is in a conductive state. A multi-output power supply characterized in that a protection circuit is connected in parallel to the three-terminal regulator to lower the divided voltage of the voltage dividing circuit via a second photocoupler so that the output voltage becomes lower when the output voltage becomes lower. Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP724890U JPH03101185U (en) | 1990-01-29 | 1990-01-29 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP724890U JPH03101185U (en) | 1990-01-29 | 1990-01-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03101185U true JPH03101185U (en) | 1991-10-22 |
Family
ID=31510910
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP724890U Pending JPH03101185U (en) | 1990-01-29 | 1990-01-29 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03101185U (en) |
-
1990
- 1990-01-29 JP JP724890U patent/JPH03101185U/ja active Pending
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