CN203502905U - Voltage-stabilized power supply circuit with short-circuit protection function - Google Patents
Voltage-stabilized power supply circuit with short-circuit protection function Download PDFInfo
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- CN203502905U CN203502905U CN201320650015.3U CN201320650015U CN203502905U CN 203502905 U CN203502905 U CN 203502905U CN 201320650015 U CN201320650015 U CN 201320650015U CN 203502905 U CN203502905 U CN 203502905U
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- triode
- circuit
- bridge rectifier
- voltage
- resistance
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Abstract
The utility model discloses a voltage-stabilized power supply circuit with a short-circuit protection function. The circuit comprises a bridge rectifier circuit, an amplifier, a first resistor, a second resistor, a third resistor, a first triode, a second triode, a first capacitor and a second capacitor. The first input end of the bridge rectifier circuit is connected with a first alternating-current voltage input end, the second input end of the bridge rectifier circuit is connected with a second alternating-current input end, the negative pole output end of the bridge rectifier circuit is grounded, the positive pole output end of the bridge rectifier circuit is connected with the collector of the first triode, the collector of the second triode, the first end of the first capacitor, the first end of the third resistor and the positive input end of the amplifier, and the second end of the first capacitor is grounded. The voltage-stabilized power supply circuit has the short-circuit protection function, is stable in work state and has popularization and use value.
Description
Technical field
The utility model relates to a kind of stabilized voltage supply, relates in particular to a kind of voltage-stabilized power supply circuit with short-circuit protection function.
Background technology
Stabilized voltage supply is building block very important in computing machine, and stabilized voltage supply is for computing machine provides the electronic installation of stablizing AC power or direct supply, to comprise alternating current steady voltage plug and the large class of D.C. regulated power supply two.Traditional stabilized voltage supply does not possess the function of short-circuit protection, and most of stabilized voltage supply in the market has unstable working condition problem.
Utility model content
The purpose of this utility model provides a kind of voltage-stabilized power supply circuit with short-circuit protection function with regard to being in order to address the above problem.
In order to achieve the above object, the utility model has adopted following technical scheme:
A kind of voltage-stabilized power supply circuit with short-circuit protection function, comprise bridge rectifier circuit, amplifier, the first resistance to the three resistance, the first triode, the second triode, the first electric capacity and the second electric capacity, the first input end of described bridge rectifier circuit is connected with the first ac voltage input, the second input end of described bridge rectifier circuit is connected with the second ac input end, the cathode output end ground connection of described bridge rectifier circuit, the cathode output end of described bridge rectifier circuit respectively with the collector of described the first triode, the collector of described the second triode, the first end of described the first electric capacity, described the 3rd first end of resistance and the electrode input end of described amplifier are connected, the second end ground connection of described the first electric capacity, ground connection after the second end of described the 3rd resistance is connected with the in-phase input end of described amplifier, the output terminal of described amplifier is connected with the first end of described the second resistance, the second end of described the second resistance is connected with the base stage of described the second triode, the emitter of described the second triode is connected with the collector of described the first triode, the emitter of described the first triode is connected with the first end of described the first resistance, the second end of described the first resistance respectively with the inverting input of described amplifier, the first end of described the second electric capacity is connected with voltage output end, the second end ground connection of described the second electric capacity.
The beneficial effects of the utility model are:
The utility model is a kind of voltage-stabilized power supply circuit with short-circuit protection function, possesses the function of short-circuit protection, and stable working state, has the value of promoting the use of.
Accompanying drawing explanation
Fig. 1 is the circuit diagram that the utlity model has the voltage-stabilized power supply circuit of short-circuit protection function.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail:
As shown in Figure 1, the utility model is a kind of voltage-stabilized power supply circuit with short-circuit protection function, comprise bridge rectifier circuit BR, amplifier IC, the first resistance R 1 is to the 3rd resistance R 3, the first triode VT1, the second triode VT2, the first capacitor C 1 and the second capacitor C 2, the first input end of bridge rectifier circuit BR is connected with the first ac voltage input, the second input end of bridge rectifier circuit BR is connected with the second ac input end, the cathode output end ground connection of bridge rectifier circuit BR, the cathode output end of bridge rectifier circuit BR respectively with the collector of the first triode VT1, the collector of the second triode VT2, the first end of the first capacitor C 1, the first end of the 3rd resistance R 3 is connected with the electrode input end of amplifier IC, the second end ground connection of the first capacitor C 1, ground connection after the second end of the 3rd resistance R 3 is connected with the in-phase input end of amplifier IC, the output terminal of amplifier IC is connected with the first end of the second resistance R 2, the second end of the second resistance R 2 is connected with the base stage of the second triode VT2, the emitter of the second triode VT2 is connected with the collector of the first triode VT1, the emitter of the first triode VT1 is connected with the first end of the first resistance R 1, the second end of the first resistance R 1 respectively with the inverting input of amplifier IC, the first end of the second capacitor C 2 is connected with voltage output end, the second end ground connection of the second capacitor C 2.
Claims (1)
1. a voltage-stabilized power supply circuit with short-circuit protection function, it is characterized in that: comprise bridge rectifier circuit, amplifier, the first resistance to the three resistance, the first triode, the second triode, the first electric capacity and the second electric capacity, the first input end of described bridge rectifier circuit is connected with the first ac voltage input, the second input end of described bridge rectifier circuit is connected with the second ac input end, the cathode output end ground connection of described bridge rectifier circuit, the cathode output end of described bridge rectifier circuit respectively with the collector of described the first triode, the collector of described the second triode, the first end of described the first electric capacity, described the 3rd first end of resistance and the electrode input end of described amplifier are connected, the second end ground connection of described the first electric capacity, ground connection after the second end of described the 3rd resistance is connected with the in-phase input end of described amplifier, the output terminal of described amplifier is connected with the first end of described the second resistance, the second end of described the second resistance is connected with the base stage of described the second triode, the emitter of described the second triode is connected with the collector of described the first triode, the emitter of described the first triode is connected with the first end of described the first resistance, the second end of described the first resistance respectively with the inverting input of described amplifier, the first end of described the second electric capacity is connected with voltage output end, the second end ground connection of described the second electric capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320650015.3U CN203502905U (en) | 2013-10-22 | 2013-10-22 | Voltage-stabilized power supply circuit with short-circuit protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320650015.3U CN203502905U (en) | 2013-10-22 | 2013-10-22 | Voltage-stabilized power supply circuit with short-circuit protection function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203502905U true CN203502905U (en) | 2014-03-26 |
Family
ID=50333868
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320650015.3U Expired - Fee Related CN203502905U (en) | 2013-10-22 | 2013-10-22 | Voltage-stabilized power supply circuit with short-circuit protection function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203502905U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106681468A (en) * | 2016-12-31 | 2017-05-17 | 马鞍山格尚智能装备有限公司 | Screen power supply amplification device based on smartphone |
-
2013
- 2013-10-22 CN CN201320650015.3U patent/CN203502905U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106681468A (en) * | 2016-12-31 | 2017-05-17 | 马鞍山格尚智能装备有限公司 | Screen power supply amplification device based on smartphone |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140326 Termination date: 20141022 |
|
| EXPY | Termination of patent right or utility model |