JPS6477220A - Driving circuit for mos-fet - Google Patents
Driving circuit for mos-fetInfo
- Publication number
- JPS6477220A JPS6477220A JP62235320A JP23532087A JPS6477220A JP S6477220 A JPS6477220 A JP S6477220A JP 62235320 A JP62235320 A JP 62235320A JP 23532087 A JP23532087 A JP 23532087A JP S6477220 A JPS6477220 A JP S6477220A
- Authority
- JP
- Japan
- Prior art keywords
- fet
- condenser
- power source
- turned
- mos
- 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
- Electronic Switches (AREA)
Abstract
PURPOSE:To simplify a power supply circuit by charging a condenser by a power source at the time of turning-off of a MOS-FET and driving a control means by the terminal voltage without discharging the condenser by a diode between the power source and the accumulator. CONSTITUTION:A power source 6 and a load 5 are connected to MOS-FETs 1-4 constituting a bridge. Driving circuits 211 and 212 are connected to gates of FETs 1 and 3, and driving circuits 221 and 222 are connected to gates of FETs 2 and 4. When the FET 1 is turned off, a condenser 26 is charged through a diode 23, a resistance 24, and a transistor TR 25 by the power source 6, and a non-inverting amplification stage 71 and a photocoupler 111 as the control means of the driving circuit are operated by this electric charge of the condenser to keep the FET 1 turned off. When a current ie of an input IN1 is cut off and a current ie' flows to an input IN2, the FET 1 is turned on and the FET 2 is turned off, and charging of the condenser is stopped. Thus, the required power source is simplified to reduce cost.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62235320A JPS6477220A (en) | 1987-09-17 | 1987-09-17 | Driving circuit for mos-fet |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62235320A JPS6477220A (en) | 1987-09-17 | 1987-09-17 | Driving circuit for mos-fet |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6477220A true JPS6477220A (en) | 1989-03-23 |
Family
ID=16984360
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62235320A Pending JPS6477220A (en) | 1987-09-17 | 1987-09-17 | Driving circuit for mos-fet |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6477220A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03206710A (en) * | 1990-01-08 | 1991-09-10 | Fuji Electric Co Ltd | Optically driven semiconductor device |
JPH04363909A (en) * | 1991-06-10 | 1992-12-16 | Shibaura Eng Works Co Ltd | Controller for switching element and device using it |
US5475333A (en) * | 1991-05-10 | 1995-12-12 | Fuji Electric Co., Ltd. | Built-in drive power-source semiconductor device |
-
1987
- 1987-09-17 JP JP62235320A patent/JPS6477220A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03206710A (en) * | 1990-01-08 | 1991-09-10 | Fuji Electric Co Ltd | Optically driven semiconductor device |
US5475333A (en) * | 1991-05-10 | 1995-12-12 | Fuji Electric Co., Ltd. | Built-in drive power-source semiconductor device |
JPH04363909A (en) * | 1991-06-10 | 1992-12-16 | Shibaura Eng Works Co Ltd | Controller for switching element and device using it |
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