JPH0226341U - - Google Patents
Info
- Publication number
- JPH0226341U JPH0226341U JP10402688U JP10402688U JPH0226341U JP H0226341 U JPH0226341 U JP H0226341U JP 10402688 U JP10402688 U JP 10402688U JP 10402688 U JP10402688 U JP 10402688U JP H0226341 U JPH0226341 U JP H0226341U
- Authority
- JP
- Japan
- Prior art keywords
- overcurrent
- protection circuit
- overcurrent protection
- transistor
- starting resistor
- 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
- 238000001514 detection method Methods 0.000 claims 3
- 230000010355 oscillation Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
Landscapes
- Protection Of Static Devices (AREA)
- Dc-Dc Converters (AREA)
Description
第１図は本考案の第１実施例の回路構成図、第
２図は本考案の第２実施例の回路構成図、第３図
は本考案の第３実施例の回路構成図、第４図は従
来技術による回路構成図である。
１……起動抵抗、２……スイツチング用トラン
ジスタ、３……トランジスタ、４……ラツチ回路
、５……差動アンプ、７……トランス。
Fig. 1 is a circuit diagram of the first embodiment of the invention, Fig. 2 is a circuit diagram of the second embodiment of the invention, Fig. 3 is a circuit diagram of the third embodiment of the invention, and Fig. 4 is a circuit diagram of the third embodiment of the invention. The figure is a circuit configuration diagram according to the prior art. 1... Starting resistor, 2... Switching transistor, 3... Transistor, 4... Latch circuit, 5... Differential amplifier, 7... Transformer.
Claims (1)
ツチング・レギユレータの過電流保護回路におい
て、１次側スイツチング・レギユレータを構成す
る発振回路のトランジスタの起動抵抗と直列に接
続したスイツチ手段と、過電流検出手段と、この
過電流検出手段の検出信号を保持する過電流状態
保持手段とを設け、この過電流保持手段の出力信
号により上記スイツチ手段を動作させて上記起動
抵抗を上記トランジスタから切り離す構成とした
ことを特徴とする過電流保護回路。 In an overcurrent protection circuit for a ringing-choke converter type switching regulator, a switching means connected in series with a starting resistor of a transistor of an oscillation circuit constituting a primary side switching regulator, an overcurrent detection means, and an overcurrent protection circuit are used. Overcurrent state holding means for holding the detection signal of the current detection means is provided, and the switching means is operated by the output signal of the overcurrent holding means to disconnect the starting resistor from the transistor. Overcurrent protection circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10402688U JPH0226341U (en) | 1988-08-08 | 1988-08-08 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10402688U JPH0226341U (en) | 1988-08-08 | 1988-08-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0226341U true JPH0226341U (en) | 1990-02-21 |
Family
ID=31335380
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10402688U Pending JPH0226341U (en) | 1988-08-08 | 1988-08-08 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0226341U (en) |
-
1988
- 1988-08-08 JP JP10402688U patent/JPH0226341U/ja active Pending