JPS58166290U - switching power supply circuit - Google Patents
switching power supply circuitInfo
- Publication number
- JPS58166290U JPS58166290U JP6143082U JP6143082U JPS58166290U JP S58166290 U JPS58166290 U JP S58166290U JP 6143082 U JP6143082 U JP 6143082U JP 6143082 U JP6143082 U JP 6143082U JP S58166290 U JPS58166290 U JP S58166290U
- Authority
- JP
- Japan
- Prior art keywords
- switching element
- power supply
- current
- supply circuit
- 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.)
- Granted
Links
Landscapes
- Protection Of Static Devices (AREA)
- Dc-Dc Converters (AREA)
- Power Conversion In General (AREA)
- Electronic Switches (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図及び第２図は、従来のスイッチング回路を示す接
続図、第３図は本考案によるスイッチング回路の一例を
示す接続図、第４図はその波形図である。
１３はスイッチング素子、３７は電流検出兼保護回路、
１４は電流−電圧変換回路、４０は制御用トランジスタ
、３Ｂ、３９．５１及び５０は第１、第２、第３及び第
４の抵抗器である。1 and 2 are connection diagrams showing a conventional switching circuit, FIG. 3 is a connection diagram showing an example of a switching circuit according to the present invention, and FIG. 4 is a waveform diagram thereof. 13 is a switching element, 37 is a current detection and protection circuit,
14 is a current-voltage conversion circuit, 40 is a control transistor, and 3B, 39.51, and 50 are first, second, third, and fourth resistors.
Claims (1)
のオンオフにより直流電流を断続して、上記トランスの
２次側コイルより整流回路を通じて直流電圧を取り出す
ようにし、上記スイッチング素子のオンオフ期間の制御
により、上記２次側に得られる直流電圧を安定化するよ
うにしたスイッチング電源回路において、上記スイッチ
ング素子に流れる電流を電流＝電圧変換回路にて変換し
て、これを第１及び第２の抵抗器よりなる抵抗分割回路
に供給し、この分割点に得られる電圧を、第３の抵抗器
を通じて制御用ト？ンジスタのベースに供給し、一方、
上記トランスには３次側コイルを設けて、その出力を整
流回路により整流し１、該整流出力を、上記制御用トラ
ンジスタに供給し、該制御用トランジスタの出力により
上記スイッチング素子のオンのパルス幅を制御するよう
になし、上記スイッチング素子の動作開始状態において
のみ上記制御用トランジスタによる上記スイッチング素
子に対する制御をかかり易くすると共に、上記第１乃至
第４の抵抗器の抵抗値の選定により、上記制御のレベル
を変更できるようにしたスイッチング電源回路。DC current is intermittent by turning on and off a switching element inserted in the primary coil of the transformer, and a DC voltage is extracted from the secondary coil of the transformer through a rectifier circuit, and by controlling the on/off period of the switching element, In the switching power supply circuit that stabilizes the DC voltage obtained on the secondary side, the current flowing through the switching element is converted by a current = voltage conversion circuit, and the current is converted from the first and second resistors. The voltage obtained at this dividing point is supplied to a control resistor divider circuit through a third resistor. supplying the base of the resistor, while
The transformer is provided with a tertiary coil, the output of which is rectified by a rectifier circuit 1, the rectified output is supplied to the control transistor, and the output of the control transistor is used to turn on the switching element with a pulse width. The switching element is easily controlled by the control transistor only when the switching element starts operating, and the resistance values of the first to fourth resistors are selected to control the switching element. A switching power supply circuit that allows the level to be changed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6143082U JPS58166290U (en) | 1982-04-27 | 1982-04-27 | switching power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6143082U JPS58166290U (en) | 1982-04-27 | 1982-04-27 | switching power supply circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58166290U true JPS58166290U (en) | 1983-11-05 |
| JPS635434Y2 JPS635434Y2 (en) | 1988-02-15 |
Family
ID=30071629
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6143082U Granted JPS58166290U (en) | 1982-04-27 | 1982-04-27 | switching power supply circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58166290U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003289668A (en) * | 2002-03-27 | 2003-10-10 | Densei Lambda Kk | Feedback circuit for power supply unit |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS564819A (en) * | 1979-06-22 | 1981-01-19 | Matsushita Electric Ind Co Ltd | Electric power supply unit |
-
1982
- 1982-04-27 JP JP6143082U patent/JPS58166290U/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS564819A (en) * | 1979-06-22 | 1981-01-19 | Matsushita Electric Ind Co Ltd | Electric power supply unit |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS635434Y2 (en) | 1988-02-15 |
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