JPH031685U - - Google Patents
Info
- Publication number
- JPH031685U JPH031685U JP5889889U JP5889889U JPH031685U JP H031685 U JPH031685 U JP H031685U JP 5889889 U JP5889889 U JP 5889889U JP 5889889 U JP5889889 U JP 5889889U JP H031685 U JPH031685 U JP H031685U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- output
- voltage
- differential amplifier
- transformer
- 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
- 238000009499 grossing Methods 0.000 claims 3
- 230000000087 stabilizing effect Effects 0.000 claims 2
- 238000004804 winding Methods 0.000 claims 2
- 239000003990 capacitor Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Description
第１図はこの考案の一実施例を示すスイツチン
グ電源の出力電圧制御回路の回路図、第２図は従
来のスイツチング電源の出力電圧制御回路の回路
図である。
１…トランス、２…スイツチング・トランジス
タ、３…制御回路、４…フアトカプラ、５…差動
増幅器、６…定電圧ダイオード、７，８，９，１
０，１７…抵抗、１１…安定化回路。
FIG. 1 is a circuit diagram of an output voltage control circuit of a switching power supply showing an embodiment of this invention, and FIG. 2 is a circuit diagram of an output voltage control circuit of a conventional switching power supply. 1... Transformer, 2... Switching transistor, 3... Control circuit, 4... Fat coupler, 5... Differential amplifier, 6... Constant voltage diode, 7, 8, 9, 1
0, 17...Resistor, 11...Stabilization circuit.
Claims (1)
を接続したスイツチング・トランジスタを備え、
前記トランスの２次側には整流回路および出力電
圧平滑回路より成る複数個の高電圧出力回路と、
整流回路および出力電圧平滑回路並びに前記出力
電圧平滑回路の出力側に設けられた安定化回路お
よびコンデンサより成る複数個の低電圧出力回路
とによつて構成された多出力回路を有するスイツ
チング電源において、 出力電圧を制御するために、任意の１個の高電
圧出力回路に並列接続した複数個の直列抵抗によ
つて成る分圧回路から検出した電圧を差動増幅器
の入力とし、さらに任意の１個の低電圧出力回路
に設けられた安定化回路の入力側もしくは出力側
に並列接続した複数個の抵抗を介して検出した電
圧を前記差動増幅器に付帯する基準電圧回路への
入力とすると共に差動増幅器およびフオトカプラ
のダイオード側の電源とし、前記差動増幅器の出
力信号をフオトカプラを介して制御回路へ送出し
、前記制御回路は前記出力信号によつて作動して
前記トランスの１次巻線に接続したスイツチング
・トランジスタを制御することを特徴とするスイ
ツチング電源の出力電圧制御回路。[Claim for Utility Model Registration] The primary side of the transformer is equipped with a switching transistor whose collector terminal is connected to the primary winding,
A plurality of high voltage output circuits each including a rectifier circuit and an output voltage smoothing circuit are provided on the secondary side of the transformer;
A switching power supply having a multi-output circuit configured with a rectifier circuit, an output voltage smoothing circuit, and a plurality of low voltage output circuits each consisting of a stabilizing circuit and a capacitor provided on the output side of the output voltage smoothing circuit, In order to control the output voltage, the voltage detected from a voltage divider circuit consisting of a plurality of series resistors connected in parallel to any one high voltage output circuit is input to a differential amplifier, The voltage detected through a plurality of resistors connected in parallel to the input or output side of the stabilizing circuit provided in the low voltage output circuit of the differential amplifier is input to the reference voltage circuit attached to the differential amplifier, and the voltage is The power supply is used for the diode side of the differential amplifier and the photocoupler, and the output signal of the differential amplifier is sent to a control circuit via the photocoupler, and the control circuit is actuated by the output signal to supply the primary winding of the transformer. An output voltage control circuit for a switching power supply characterized by controlling connected switching transistors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5889889U JPH031685U (en) | 1989-05-22 | 1989-05-22 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5889889U JPH031685U (en) | 1989-05-22 | 1989-05-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH031685U true JPH031685U (en) | 1991-01-09 |
Family
ID=31584924
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5889889U Pending JPH031685U (en) | 1989-05-22 | 1989-05-22 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH031685U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5420184A (en) * | 1977-07-16 | 1979-02-15 | Kanei Kougiyou Yuugen | Dried gourd shavings making apparatus with rotary knife stand |
-
1989
- 1989-05-22 JP JP5889889U patent/JPH031685U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5420184A (en) * | 1977-07-16 | 1979-02-15 | Kanei Kougiyou Yuugen | Dried gourd shavings making apparatus with rotary knife stand |