JPS56127214A - Power supply circuit - Google Patents
Power supply circuitInfo
- Publication number
- JPS56127214A JPS56127214A JP3053880A JP3053880A JPS56127214A JP S56127214 A JPS56127214 A JP S56127214A JP 3053880 A JP3053880 A JP 3053880A JP 3053880 A JP3053880 A JP 3053880A JP S56127214 A JPS56127214 A JP S56127214A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- circuit
- output
- supplied
- short circuit
- 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
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is DC
- G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is DC using semiconductor devices in series with the load as final control devices
- G05F1/565—Regulating voltage or current wherein the variable actually regulated by the final control device is DC using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor
- G05F1/569—Regulating voltage or current wherein the variable actually regulated by the final control device is DC using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor for protection
- G05F1/573—Regulating voltage or current wherein the variable actually regulated by the final control device is DC using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor for protection with overcurrent detector
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Continuous-Control Power Sources That Use Transistors (AREA)
Abstract
PURPOSE:To prevent a continuous flow of a large current during a short circuit and realize an automatic reset of the output when the short circuit is cancelled, by discontinuing the supply of voltage to either none of the reference voltage generating circuit and the error detecting circuit in case when an output terminal has a short circuit. CONSTITUTION:The voltage is supplied to both the reference voltage generating circuit 2 and the error detecting circuit 3 from the unstable voltage VCC via the resistance 1. The stable reference voltage VREF is generated from the circuit 2 to be supplied to the plus terminal of the circuit 3. The voltage VOS obtained by dividing the output voltage VO via the resistances 9 and 10 is supplied to the minus terminal of the circuit 3. The output of the circuit 3 controls the switching transistors TR4 and TR6 to produce the stable output voltage VO at the output terminal 7. When the terminal is earthed for short circuit, the current supplied from the voltage VCC flows to the diode D11. Then the voltage to each of the circuits 2 and 3 turns into the forward falling voltage, and thus the circuits 2 and 3 have no operation with the TR4 and TR6 are made nonconductive. The current flowing to the diode D11 is limited by the resistance 1 to avoid a flow of a large current. At the same time, the voltage is supplied again to the circuits 2 and 3 when the short circuit is cancelled to secure the output voltage VO again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3053880A JPS56127214A (en) | 1980-03-11 | 1980-03-11 | Power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3053880A JPS56127214A (en) | 1980-03-11 | 1980-03-11 | Power supply circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS56127214A true JPS56127214A (en) | 1981-10-05 |
Family
ID=12306566
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3053880A Pending JPS56127214A (en) | 1980-03-11 | 1980-03-11 | Power supply circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56127214A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61240309A (en) * | 1985-02-21 | 1986-10-25 | ドイチエ・トムソン−ブラント・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング | Power source unit having short circuit resistance |
| JPS61245222A (en) * | 1985-04-23 | 1986-10-31 | Fuji Electric Co Ltd | Constant voltage power supply circuit |
| JPS6331418U (en) * | 1986-08-19 | 1988-03-01 | ||
| JPH02214909A (en) * | 1989-02-15 | 1990-08-27 | Rohm Co Ltd | Dc stabilized power circuit |
-
1980
- 1980-03-11 JP JP3053880A patent/JPS56127214A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61240309A (en) * | 1985-02-21 | 1986-10-25 | ドイチエ・トムソン−ブラント・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング | Power source unit having short circuit resistance |
| JPS61245222A (en) * | 1985-04-23 | 1986-10-31 | Fuji Electric Co Ltd | Constant voltage power supply circuit |
| JPS6331418U (en) * | 1986-08-19 | 1988-03-01 | ||
| JPH02214909A (en) * | 1989-02-15 | 1990-08-27 | Rohm Co Ltd | Dc stabilized power circuit |
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