JPS5717226A - Integrated circuit - Google Patents
Integrated circuitInfo
- Publication number
- JPS5717226A JPS5717226A JP9246780A JP9246780A JPS5717226A JP S5717226 A JPS5717226 A JP S5717226A JP 9246780 A JP9246780 A JP 9246780A JP 9246780 A JP9246780 A JP 9246780A JP S5717226 A JPS5717226 A JP S5717226A
- Authority
- JP
- Japan
- Prior art keywords
- base current
- overvoltage
- trq4
- trq3
- turned
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/08—Modifications for protecting switching circuit against overcurrent or overvoltage
Landscapes
- Electronic Switches (AREA)
Abstract
PURPOSE:To achive the protection against overvoltage surely without being interferred with an overload protection function, by controlling the base current of a transistor(TR) provided in parallel with a TR receiving an input signal at an overvoltage detecting circuit. CONSTITUTION:An power supply Vcc is excessive due to surge, then an overvoltage detection circuit 20 is operated, a base current flows to a TRQ4 to be turned on and to turn on a TRQ3by flowing a base current. Thus, the collector potential of the collector potential of the TRQ3 goes down and the overvoltage is absorbed with a load RL. In this case, a greater load current flows to operate an overload detection circuit 10, a TRQ2 is turned off and the supply of base current to the TRQ3 is stopped. But, the base current is supplied from the TRQ4 and then no hindrance is given. On the other hand, when the power supply Vcc is normal, the TRQ4 is turned off and the base current of the TRQ3 is controlled with the TRQ2.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55092467A JPS6040219B2 (en) | 1980-07-07 | 1980-07-07 | integrated circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55092467A JPS6040219B2 (en) | 1980-07-07 | 1980-07-07 | integrated circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5717226A true JPS5717226A (en) | 1982-01-28 |
JPS6040219B2 JPS6040219B2 (en) | 1985-09-10 |
Family
ID=14055140
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP55092467A Expired JPS6040219B2 (en) | 1980-07-07 | 1980-07-07 | integrated circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6040219B2 (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2530390A1 (en) * | 1982-07-17 | 1984-01-20 | Bosch Gmbh Robert | DARLINGTON MOUNTING OF TRANSISTORS |
JPS59216324A (en) * | 1983-05-24 | 1984-12-06 | Fuji Electric Co Ltd | Overcurrent protecting system of transistor |
JPS6093963A (en) * | 1983-10-28 | 1985-05-25 | Yamatake Honeywell Co Ltd | Over current detecting circuit of electronic switch |
JPS6093961A (en) * | 1983-10-28 | 1985-05-25 | Yamatake Honeywell Co Ltd | Over current detecting circuit of electronic switch |
JPS6093962A (en) * | 1983-10-28 | 1985-05-25 | Yamatake Honeywell Co Ltd | Over current detecting circuit of electronic switch |
JPS6093964A (en) * | 1983-10-28 | 1985-05-25 | Yamatake Honeywell Co Ltd | Over current detecting circuit of electronic switch |
JPS6097280A (en) * | 1983-10-31 | 1985-05-31 | Yamatake Honeywell Co Ltd | Overcurrent detecting circuit of electronic switch |
JPH05240433A (en) * | 1992-02-27 | 1993-09-17 | Hanshin Electric Co Ltd | Load control circuit for hot water feeder |
EP0680147A2 (en) * | 1994-04-28 | 1995-11-02 | Mitsubishi Denki Kabushiki Kaisha | Semiconductor power module and power conversion device |
-
1980
- 1980-07-07 JP JP55092467A patent/JPS6040219B2/en not_active Expired
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2530390A1 (en) * | 1982-07-17 | 1984-01-20 | Bosch Gmbh Robert | DARLINGTON MOUNTING OF TRANSISTORS |
JPS59216324A (en) * | 1983-05-24 | 1984-12-06 | Fuji Electric Co Ltd | Overcurrent protecting system of transistor |
JPS6093963A (en) * | 1983-10-28 | 1985-05-25 | Yamatake Honeywell Co Ltd | Over current detecting circuit of electronic switch |
JPS6093961A (en) * | 1983-10-28 | 1985-05-25 | Yamatake Honeywell Co Ltd | Over current detecting circuit of electronic switch |
JPS6093962A (en) * | 1983-10-28 | 1985-05-25 | Yamatake Honeywell Co Ltd | Over current detecting circuit of electronic switch |
JPS6093964A (en) * | 1983-10-28 | 1985-05-25 | Yamatake Honeywell Co Ltd | Over current detecting circuit of electronic switch |
JPS6097280A (en) * | 1983-10-31 | 1985-05-31 | Yamatake Honeywell Co Ltd | Overcurrent detecting circuit of electronic switch |
JPH05240433A (en) * | 1992-02-27 | 1993-09-17 | Hanshin Electric Co Ltd | Load control circuit for hot water feeder |
EP0680147A2 (en) * | 1994-04-28 | 1995-11-02 | Mitsubishi Denki Kabushiki Kaisha | Semiconductor power module and power conversion device |
EP0680147B1 (en) * | 1994-04-28 | 1999-03-31 | Mitsubishi Denki Kabushiki Kaisha | Semiconductor power module and power conversion device |
Also Published As
Publication number | Publication date |
---|---|
JPS6040219B2 (en) | 1985-09-10 |
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