JPS6383943U - - Google Patents
Info
- Publication number
- JPS6383943U JPS6383943U JP17701686U JP17701686U JPS6383943U JP S6383943 U JPS6383943 U JP S6383943U JP 17701686 U JP17701686 U JP 17701686U JP 17701686 U JP17701686 U JP 17701686U JP S6383943 U JPS6383943 U JP S6383943U
- Authority
- JP
- Japan
- Prior art keywords
- switching transistor
- supply line
- power supply
- switching
- transistors
- 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)
Description
図は本考案の実施例を示すものである。
９……第１スイツチングトランジスタ、１１…
…第２スイツチングトランジスタ、１２……第３
スイツチングトランジスタ、１３……第４スイツ
チングトランジスタ、１５……第５スイツチング
トランジスタ。
The figure shows an embodiment of the invention. 9...first switching transistor, 11...
...Second switching transistor, 12...Third
Switching transistor, 13...Fourth switching transistor, 15...Fifth switching transistor.
Claims (1)
となる第１スイツチングトランジスタと、正電源
線路にエミツタが接続され前記第１スイツチング
トランジスタの導通に応じて導通状態となる第２
スイツチングトランジスタと、負電源線路とアー
ス間にコレクタ・エミツタが接続され前記第２ス
イツチングトランジスタの導通に応じて導通状態
となる第３及び第４スイツチングトランジスタと
、負電源線路にベースが接続された短絡検出用の
第５スイツチングトランジスタとを備え、正負源
線路の短絡時には前記第５スイツチングトランジ
スタのオン動作に基づき前記第３及び第４スイツ
トングトランジスタをオフせしめるようにしたこ
とを特徴とする電源トランジスタの保護回路。 a first switching transistor that becomes conductive when a timer output is applied; and a second switching transistor that has an emitter connected to the positive power supply line and becomes conductive in response to conduction of the first switching transistor.
a switching transistor; third and fourth switching transistors whose collectors and emitters are connected between the negative power supply line and ground and which become conductive in accordance with the conduction of the second switching transistor; and whose bases are connected to the negative power supply line. and a fifth switching transistor for detecting a short circuit, and when the positive and negative source lines are short-circuited, the third and fourth switching transistors are turned off based on the on operation of the fifth switching transistor. protection circuit for power transistors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17701686U JPS6383943U (en) | 1986-11-18 | 1986-11-18 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17701686U JPS6383943U (en) | 1986-11-18 | 1986-11-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6383943U true JPS6383943U (en) | 1988-06-01 |
Family
ID=31117818
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17701686U Pending JPS6383943U (en) | 1986-11-18 | 1986-11-18 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6383943U (en) |
-
1986
- 1986-11-18 JP JP17701686U patent/JPS6383943U/ja active Pending