JPS6122186U - Switching regulator protection circuit - Google Patents
Switching regulator protection circuitInfo
- Publication number
- JPS6122186U JPS6122186U JP10467384U JP10467384U JPS6122186U JP S6122186 U JPS6122186 U JP S6122186U JP 10467384 U JP10467384 U JP 10467384U JP 10467384 U JP10467384 U JP 10467384U JP S6122186 U JPS6122186 U JP S6122186U
- Authority
- JP
- Japan
- Prior art keywords
- switching
- protection circuit
- regulator
- switching regulator
- overcurrent prevention
- 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
Landscapes
- Protection Of Static Devices (AREA)
- Dc-Dc Converters (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図は本考案の一実施例の保護回路を含む回路図、第
２図は従来例と本考案の実施例との電源スイッチ投入後
の平滑出力電圧の時間的変化を示す図、第３図は、本考
案実施例における出力トランジスタのコレクタ・エミッ
タ間電圧とコレクタ電流の関係を示す図、第４図はスイ
ッチングレギュレータを含む従来例の回路図である。
Ａは全波整流回路、Ｂは平滑回路、Ｃはスイッチングレ
ギュレータ、ＳＣＲはサイリスク（スイッチング素子）
、Ｒｌ，Ｒ２は過電流防止抵抗、Ｔｒハ出力トランジス
タ（レギュレータ素子）。Fig. 1 is a circuit diagram including a protection circuit according to an embodiment of the present invention, Fig. 2 is a diagram showing temporal changes in the smoothed output voltage after turning on the power switch in the conventional example and the embodiment of the present invention, and Fig. 3 This figure shows the relationship between the collector-emitter voltage and the collector current of the output transistor in the embodiment of the present invention, and FIG. 4 is a circuit diagram of a conventional example including a switching regulator. A is a full-wave rectifier circuit, B is a smoothing circuit, C is a switching regulator, and SCR is a thyrisk (switching element).
, Rl, and R2 are overcurrent prevention resistors, and Tr is an output transistor (regulator element).
Claims (1)
ることにより出力電圧を安定化するレギュレータ素子を
含むスイッチングレギュレータを保護する保護回路にお
いて、 前記整流回路とこの整流回路の出力を平滑してスイッチ
ングレギュレータに平滑出力電圧を与える平滑コンデン
サとの間に、互いに直列に接続され、前記レギュレータ
素子へ過電流が流れをことを防止する少なくとも２個の
過電流防止抵抗と、前記過電流防止抵抗の一方と並列に
接続され、その導通時に該一方の過電流防止抵抗を短絡
するスイッチング素子と、 交流電源と前記整流回路との間の電源ス・ｆツチの投入
後、前記レギュレータ素子の起動を検出するとともに、
この検出出力に応答して前記スイツチング素子を導通さ
せるゲート回路とを含むことを特徴とするスイッチング
レギュレータの保護回路。[Claims for Utility Model Registration] A protection circuit that protects a switching regulator that is connected to a rectifier circuit of an AC power source and that includes a regulator element that stabilizes the output voltage by switching: at least two overcurrent prevention resistors connected in series with each other to prevent overcurrent from flowing to the regulator element; a switching element that is connected in parallel with one of the overcurrent prevention resistors and short-circuits the one overcurrent prevention resistor when the switching element is conductive; In addition to detecting the activation of the element,
A protection circuit for a switching regulator, comprising: a gate circuit that makes the switching element conductive in response to the detection output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10467384U JPS6122186U (en) | 1984-07-10 | 1984-07-10 | Switching regulator protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10467384U JPS6122186U (en) | 1984-07-10 | 1984-07-10 | Switching regulator protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6122186U true JPS6122186U (en) | 1986-02-08 |
Family
ID=30664011
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10467384U Pending JPS6122186U (en) | 1984-07-10 | 1984-07-10 | Switching regulator protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6122186U (en) |
-
1984
- 1984-07-10 JP JP10467384U patent/JPS6122186U/en active Pending
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