JPS5975785U - Switching regulator overcurrent protection circuit - Google Patents
Switching regulator overcurrent protection circuitInfo
- Publication number
- JPS5975785U JPS5975785U JP17114682U JP17114682U JPS5975785U JP S5975785 U JPS5975785 U JP S5975785U JP 17114682 U JP17114682 U JP 17114682U JP 17114682 U JP17114682 U JP 17114682U JP S5975785 U JPS5975785 U JP S5975785U
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- switching regulator
- protection circuit
- overcurrent protection
- 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)
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図は過電流保護の回路を備えたスイッチングレギュ
レータの従来例を示す回路図マ第２図は過電流保護特性
図、第３図は本考案の一実施例を示す回路図、第４図は
本考案の他の実施例（要部）を示す回路図である。
ＶｒＮ・・・入力交流電源、ＲＦ・・・整流器、Ｔ・・
・変圧器、Ｑ□・・・スイッチングトランジスタ、−Ｃ
Ｎ・・・制御部、ｃｐ・・・比較器、Ｒ０〜Ｒ７・・・
抵抗、Ｃｏ、Ｃ２・・・コンデンサ、ｚＤｌ、ＺＤ２・
・・ツェナダイオード、Ｖ。・・・出力電圧、■。・・
・出力電流、■２・・・−次側ピ＝り電流、Ｖ、・・・
検出電圧、ＶＲ・・・基準用電圧。Figure 1 is a circuit diagram showing a conventional example of a switching regulator equipped with an overcurrent protection circuit. Figure 2 is an overcurrent protection characteristic diagram. Figure 3 is a circuit diagram showing an embodiment of the present invention. Figure 4. FIG. 2 is a circuit diagram showing another embodiment (main part) of the present invention. VrN... Input AC power supply, RF... Rectifier, T...
・Transformer, Q□...Switching transistor, -C
N...Control unit, cp...Comparator, R0 to R7...
Resistor, Co, C2... Capacitor, zDl, ZD2...
... Zener diode, V. ...Output voltage, ■.・・・
・Output current, ■2...-Next side piping current, V,...
Detection voltage, VR...Reference voltage.
Claims (1)
前記スイッチング素子のスイッチング間隔等の制御によ
って前記変圧器の２次側に直流の一定電圧を得るスイッ
チングレギュレータにおいて、前記変圧器に流れる一次
側ピーク電流を検出して電圧変換を行い、これを入力電
源電圧に応じて変動する基準用電圧と比較し、過電流時
に前記スイッチング素子を制御して出力電圧を垂下させ
るようにしたことを特徴とするスイッチングレギュレー
タの過電流保護回路。Connect a transformer to a DC power source via a switching element,
In a switching regulator that obtains a constant DC voltage on the secondary side of the transformer by controlling the switching interval of the switching element, the primary side peak current flowing through the transformer is detected, voltage converted, and the voltage is converted to the input power source. An overcurrent protection circuit for a switching regulator, characterized in that the switching element is controlled to drop the output voltage in the event of an overcurrent by comparing it with a reference voltage that varies depending on the voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17114682U JPS5975785U (en) | 1982-11-12 | 1982-11-12 | Switching regulator overcurrent protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17114682U JPS5975785U (en) | 1982-11-12 | 1982-11-12 | Switching regulator overcurrent protection circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5975785U true JPS5975785U (en) | 1984-05-23 |
| JPS6349107Y2 JPS6349107Y2 (en) | 1988-12-16 |
Family
ID=30373414
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17114682U Granted JPS5975785U (en) | 1982-11-12 | 1982-11-12 | Switching regulator overcurrent protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5975785U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02174556A (en) * | 1988-12-23 | 1990-07-05 | Origin Electric Co Ltd | Converter having drooping output characteristic |
| JPH04138058A (en) * | 1990-09-27 | 1992-05-12 | Murata Mfg Co Ltd | Switching regulator |
-
1982
- 1982-11-12 JP JP17114682U patent/JPS5975785U/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02174556A (en) * | 1988-12-23 | 1990-07-05 | Origin Electric Co Ltd | Converter having drooping output characteristic |
| JPH04138058A (en) * | 1990-09-27 | 1992-05-12 | Murata Mfg Co Ltd | Switching regulator |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6349107Y2 (en) | 1988-12-16 |
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