JPH02125530U - - Google Patents
Info
- Publication number
- JPH02125530U JPH02125530U JP3235389U JP3235389U JPH02125530U JP H02125530 U JPH02125530 U JP H02125530U JP 3235389 U JP3235389 U JP 3235389U JP 3235389 U JP3235389 U JP 3235389U JP H02125530 U JPH02125530 U JP H02125530U
- Authority
- JP
- Japan
- Prior art keywords
- load
- circuit
- transistor
- voltage
- detects
- 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 description 9
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Emergency Protection Circuit Devices (AREA)
- Protection Of Static Devices (AREA)
Description
第１図は本考案の第１の実施例を示す電気的構
成の概略図、第２図は本考案の第２の実施例を示
す第１図相当図である。
図面中、１及び２７はパワートランジスタ（ト
ランジスタ）、２は負荷、３は負荷回路、４は電
流検知用抵抗、５は車載バツテリ（直流電源）、
６はベース駆動回路、８はベース駆動用トランジ
スタ、９は制御回路、１０は比較回路、１１及び
１１′は保持回路、２１は過電流検出回路（第１
の保護回路）、２２はツエナーダイオード（電圧
検知素子）、２６は過電圧検知回路（第２の保護
回路）である。
FIG. 1 is a schematic diagram of an electrical configuration showing a first embodiment of the present invention, and FIG. 2 is a diagram corresponding to FIG. 1 showing a second embodiment of the present invention. In the drawing, 1 and 27 are power transistors, 2 is a load, 3 is a load circuit, 4 is a current detection resistor, 5 is an on-board battery (DC power supply),
6 is a base drive circuit, 8 is a base drive transistor, 9 is a control circuit, 10 is a comparison circuit, 11 and 11' are holding circuits, 21 is an overcurrent detection circuit (first
22 is a Zener diode (voltage detection element), and 26 is an overvoltage detection circuit (second protection circuit).
Claims (1)
源を供給して負荷を駆動する負荷回路を備えたも
のにおいて、前記トランジスタの制御をするベー
ス駆動回路と、前記トランジスタの負荷電流を検
知する電流検知用抵抗と、この電流検知用抵抗の
端子電圧を入力としこの端子電圧が所定値を超え
たときに前記ベース駆動回路に停止信号を与える
第１の保護回路と、前記負荷回路にかかる電圧を
検知する電圧検知素子と、この電圧検知素子の検
知電圧が所定値を超えたときに前記ベース駆動回
路に停止信号を与える第２の保護回路とを具備し
てなる車両用負荷の駆動装置。 A load circuit that drives a load by supplying DC power using a transistor as a switching element, which comprises: a base drive circuit that controls the transistor; a current detection resistor that detects the load current of the transistor; and a current detection resistor that detects the load current of the transistor. a first protection circuit that receives a terminal voltage of a detection resistor and provides a stop signal to the base drive circuit when the terminal voltage exceeds a predetermined value; a voltage detection element that detects a voltage applied to the load circuit; A vehicle load drive device comprising: a second protection circuit that provides a stop signal to the base drive circuit when the detected voltage of the voltage detection element exceeds a predetermined value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3235389U JPH02125530U (en) | 1989-03-22 | 1989-03-22 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3235389U JPH02125530U (en) | 1989-03-22 | 1989-03-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02125530U true JPH02125530U (en) | 1990-10-16 |
Family
ID=31535317
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3235389U Pending JPH02125530U (en) | 1989-03-22 | 1989-03-22 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02125530U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI513130B (en) * | 2013-11-21 | 2015-12-11 | 三菱電機股份有限公司 | Protection circuit for a robot control device |
-
1989
- 1989-03-22 JP JP3235389U patent/JPH02125530U/ja active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI513130B (en) * | 2013-11-21 | 2015-12-11 | 三菱電機股份有限公司 | Protection circuit for a robot control device |
| US9728954B2 (en) | 2013-11-21 | 2017-08-08 | Mitsubishi Electric Corporation | Protection circuit for robot control device |
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