JPH03127444U - - Google Patents
Info
- Publication number
- JPH03127444U JPH03127444U JP3578190U JP3578190U JPH03127444U JP H03127444 U JPH03127444 U JP H03127444U JP 3578190 U JP3578190 U JP 3578190U JP 3578190 U JP3578190 U JP 3578190U JP H03127444 U JPH03127444 U JP H03127444U
- Authority
- JP
- Japan
- Prior art keywords
- control transistor
- transistor
- base
- collector
- 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 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Television Receiver Circuits (AREA)
- Emergency Protection Circuit Devices (AREA)
Description
第１図は本考案の一実施例に係る電源回路図、
第２図は従来例に係る電源回路図である。
１……整流回路、２……制御トランジスタ、３
……負荷回路、４，６，１０，１１……抵抗、５
……トランジスタ、７，８……ツエナーダイオー
ド、９……サイリスタ。
FIG. 1 is a power supply circuit diagram according to an embodiment of the present invention,
FIG. 2 is a power supply circuit diagram according to a conventional example. 1... Rectifier circuit, 2... Control transistor, 3
...Load circuit, 4, 6, 10, 11...Resistance, 5
...transistor, 7,8...zener diode, 9...thyristor.
Claims (1)
ジスタのベース抵抗を共有し、コレクタ側にトラ
ンジスタのエミツタを接続し、抵抗、ツエナーダ
イオードを介して前記制御トランジスタのベース
に接続することにより、負荷回路短絡時、前記制
御トランジスタのコレクターベース間電圧が上昇
することを検出し、接続したトランジスタが動作
し検出信号をコレクタ、抵抗を介してサイリスタ
のゲートに印加し、前記サイリスタを動作させ、
前記制御トランジスタのベース電圧をゼロ電圧と
させ前記制御トランジスタをカツトオフさせるこ
とにより他回路を保護することを特徴とする過電
流保護回路。 In a series control type power supply circuit, the base resistance of the control transistor is shared, the emitter of the transistor is connected to the collector side, and the base of the control transistor is connected via a resistor and a Zener diode, so that when the load circuit is short-circuited, Detecting that the collector-base voltage of the control transistor increases, the connected transistor operates and applies a detection signal to the collector and the gate of the thyristor via the resistor to operate the thyristor,
An overcurrent protection circuit that protects other circuits by setting the base voltage of the control transistor to zero voltage and cutting off the control transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3578190U JPH03127444U (en) | 1990-04-04 | 1990-04-04 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3578190U JPH03127444U (en) | 1990-04-04 | 1990-04-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03127444U true JPH03127444U (en) | 1991-12-20 |
Family
ID=31541437
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3578190U Pending JPH03127444U (en) | 1990-04-04 | 1990-04-04 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03127444U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008284926A (en) * | 2007-05-15 | 2008-11-27 | Mazda Motor Corp | Side door visor |
| JP2008284927A (en) * | 2007-05-15 | 2008-11-27 | Mazda Motor Corp | Side door visor |
-
1990
- 1990-04-04 JP JP3578190U patent/JPH03127444U/ja active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008284926A (en) * | 2007-05-15 | 2008-11-27 | Mazda Motor Corp | Side door visor |
| JP2008284927A (en) * | 2007-05-15 | 2008-11-27 | Mazda Motor Corp | Side door visor |