CN214151531U - Voltage-stabilized power supply circuit - Google Patents
Voltage-stabilized power supply circuit Download PDFInfo
- Publication number
- CN214151531U CN214151531U CN202120475689.9U CN202120475689U CN214151531U CN 214151531 U CN214151531 U CN 214151531U CN 202120475689 U CN202120475689 U CN 202120475689U CN 214151531 U CN214151531 U CN 214151531U
- Authority
- CN
- China
- Prior art keywords
- resistor
- mos transistor
- power supply
- triode
- electrode
- 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.)
- Active
Links
Images
Landscapes
- Continuous-Control Power Sources That Use Transistors (AREA)
Abstract
The utility model discloses a voltage-stabilized power supply circuit, including resistance R17, resistance R58, MOS pipe Q7, triode Q2, resistance R3, resistance R7, triode Q6, resistance R19, MOS pipe Q2, MOS pipe Q4, MOS pipe Q8, resistance R24, resistance R28, triode Q10, resistance R33 and MOS pipe Q9, the one end of resistance R17 and the one end of resistance R28 all are as first input control end SW _ R, the other end of resistance R17, the one end of resistance R58, the source of MOS pipe Q4 and the grid of MOS pipe Q7 all connect, the drain of MOS pipe Q7, the other end of resistance R7 and the base of triode Q6 are connected and are as second input control end SW _ F; the utility model has the advantages that: the voltage-stabilized power supply circuit with the changeable positive and negative polarities can meet the requirements of special test scenes.
Description
Technical Field
The utility model relates to a constant voltage power supply field, more specifically relate to a constant voltage power supply circuit.
Background
The DC stabilized power supply can provide an electronic device for stabilizing a DC power supply for a load. The power supply of the direct current stabilized power supply is mostly an alternating current power supply, and when the voltage or the load resistance of the alternating current power supply changes, the direct current output voltage of the voltage stabilizer can be kept stable. With the development of electronic equipment towards high precision, high stability and high reliability, the direct current stabilized voltage power supply puts high demands on the power supply of the electronic equipment.
With the development of electronic circuits, dc voltage-stabilized power supplies are applied to a large number of devices, but some special test scenarios set new requirements for the variability of the positive and negative polarities of the output of a dc voltage-stabilized circuit, so a voltage-stabilized power supply circuit with variable positive and negative polarities of the output needs to be designed to meet the requirements of the special test scenarios.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a demand in order to satisfy special test scene is provided to the changeable constant voltage power supply circuit of positive negative polarity of output.
The utility model discloses a following technical means realizes solving above-mentioned technical problem: a voltage-stabilized power supply circuit comprises a resistor R, an MOS tube Q, a triode Q, a resistor R, a triode Q, a resistor R, an MOS tube Q, a resistor R, a triode Q, a resistor R and an MOS tube Q, wherein one end of the resistor R and one end of the resistor R are used as a first input control end SW _ R, the other end of the resistor R, one end of the resistor R, a source electrode of the MOS tube Q and a grid electrode of the MOS tube Q are all connected, the other end of the resistor R and the source electrode of the MOS tube Q are grounded, one end of the resistor R is connected with a power supply +5VL, a drain electrode of the MOS tube Q, the other end of the resistor R and a base electrode of the triode Q are connected and used as a second input control end SW _ F, a collector electrode of the triode Q is connected with the source electrode of the MOS tube Q and one end of the resistor R, the other end of the resistor R, the grid electrode of the MOS tube Q and the grid electrode of the MOS tube Q are connected, the drain electrode of the MOS transistor Q2 is connected with the drain electrode of the MOS transistor Q4 and serves as an output positive terminal V _ DUT +;
one end of the resistor R19 is connected with an emitter of the triode Q6, and the other end of the resistor R19 and the grid of the MOS transistor Q4 are grounded; the grid electrode of the MOS tube Q8 is connected with one end of a resistor R24, the other end of the resistor R24, the source electrode of the MOS tube Q8 and the collector electrode of the triode Q10 are connected, the other end of the resistor R28 is connected with the base electrode of the triode Q10, and the emitter electrode of the triode Q10 is grounded through the resistor R33; the drain of the MOS transistor Q8 is connected to the drain of the MOS transistor Q9 as the negative output terminal V _ DUT-, the source of the MOS transistor Q9 is the second input control terminal SW _ F, and the gate of the MOS transistor Q9 is grounded.
The utility model discloses a change first input control end SW _ R and second input control end SW _ F's high-low level can change the output voltage polarity, provide a changeable constant voltage power supply circuit of positive negative polarity of output, can satisfy the demand of special test scene.
Further, the voltage-stabilized power supply circuit further comprises a switch diode D3 and a switch diode D4, a first pin of the switch diode D3 is used as a first protection terminal OC _ ISWP _ PC, a first pin of the switch diode D4 is used as a second protection terminal DIS _ VDUT, and a second pin of the switch diode D3 and a second pin of the switch diode D4 are both connected with a drain of the MOS transistor Q7; the third pin of the switching diode D3 and the third pin of the switching diode D4 are both connected to the base of the transistor Q10.
Further, the switching diode D3 and the switching diode D4 are both of the BAV70W type.
Further, the transistor Q6 and the transistor Q10 are both PMSTA 06.
Further, the MOS transistor Q2 and the MOS transistor Q8 are both SQJ469 EP.
Further, the MOS transistor Q4 and the MOS transistor Q9 are both SQJ402 EP.
Further, the model of the MOS transistor Q7 is PMF63 UNEA.
The utility model has the advantages that: the utility model discloses a change first input control end SW _ R and second input control end SW _ F's high-low level can change the output voltage polarity, provide a changeable constant voltage power supply circuit of positive negative polarity of output, can satisfy the demand of special test scene.
Drawings
Fig. 1 is a schematic diagram of a regulated power supply circuit according to an embodiment of the present invention.
Detailed Description
To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the embodiments of the present invention are combined to clearly and completely describe the technical solution in the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in FIG. 1, a voltage-stabilized power supply circuit comprises a resistor R17, a resistor R58, a MOS transistor Q7, a triode Q2, a resistor R3, a resistor R7, a triode Q6, a resistor R19, a MOS transistor Q2, a MOS transistor Q4, a MOS transistor Q8, a resistor R24, a resistor R28, a triode Q10, a resistor R33 and a MOS transistor Q9, wherein the models of the triode Q6 and the triode Q10 are PMSTA 06. The MOS transistor Q2 and the MOS transistor Q8 are both SQJ469 EP. The MOS transistor Q4 and the MOS transistor Q9 are both SQJ402 EP. The MOS tube Q7 is of the model PMF63 UNEA.
One end of the resistor R17 and one end of the resistor R28 are used as a first input control end SW _ R, the other end of the resistor R17, one end of the resistor R58, the source of the MOS transistor Q4 and the gate of the MOS transistor Q7 are all connected, the other end of the resistor R58 and the source of the MOS transistor Q7 are grounded, one end of the resistor R7 is connected with a power supply +5VL, the drain of the MOS transistor Q7, the other end of the resistor R7 and the base of the triode Q6 are connected and used as a second input control end SW _ F, the collector of the triode Q6 is connected with the source of the MOS transistor Q2 and one end of the resistor R3, the other end of the resistor R3, the gate of the MOS transistor Q2 and the gate of the MOS transistor Q8, and the drain of the MOS transistor Q2 is connected with the drain of the MOS transistor Q4 and used as an output positive end V _ DUT +;
one end of the resistor R19 is connected with an emitter of the triode Q6, and the other end of the resistor R19 and the grid of the MOS transistor Q4 are grounded; the grid electrode of the MOS tube Q8 is connected with one end of a resistor R24, the other end of the resistor R24, the source electrode of the MOS tube Q8 and the collector electrode of the triode Q10 are connected, the other end of the resistor R28 is connected with the base electrode of the triode Q10, and the emitter electrode of the triode Q10 is grounded through the resistor R33; the drain of the MOS transistor Q8 is connected to the drain of the MOS transistor Q9 as the negative output terminal V _ DUT-, the source of the MOS transistor Q9 is the second input control terminal SW _ F, and the gate of the MOS transistor Q9 is grounded.
The voltage-stabilizing power supply circuit further comprises a switch diode D3 and a switch diode D4, wherein a first pin of the switch diode D3 is used as a first protection end OC _ ISWP _ PC, a first pin of the switch diode D4 is used as a second protection end DIS _ VDUT, and a second pin of the switch diode D3 and a second pin of the switch diode D4 are connected with a drain electrode of the MOS tube Q7; the third pin of the switching diode D3 and the third pin of the switching diode D4 are both connected to the base of the transistor Q10. The switch diode D3 and the switch diode D4 are both BAV 70W. When overcurrent and overvoltage are detected, the first protection end OC _ ISWP _ PC and the second protection end DIS _ VDUT input low level can cut off the output of the voltage stabilizing source, and the protection effect is achieved.
The utility model discloses a working process does: the input direct current positive electrode has a potential difference of 12V from the ground GNDL at the pin 2 of the MOS transistor Q2, when the second input control terminal SW _ F is at a high level and the first input control terminal SW _ R is at a high resistance state, the triode Q6 is conducted to enable the voltage difference between the pin 4 (source) and the pin 3 (grid) of the MOS transistor Q2 to be larger than the conduction condition of 4V, at the moment, the positive voltage is transmitted to the output positive terminal V _ DUT +, the voltage difference between the pin 4 (source) and the pin 3 (grid) of the MOS transistor Q9 is larger than 4V, the conduction condition is met, at the moment, the negative voltage is transmitted to the output negative terminal V _ DUT-, namely, the voltage is pulled down to the ground GNDL. When the first input control end SW _ R is at a high level, the MOS transistor Q7 meets the conduction condition, so that the second input control end SW _ F is pulled to a low level, and at this time, the MOS transistor Q2 and the MOS transistor Q9 are disconnected, when the first input control end SW _ R is at a high level, the voltage difference between the 4 th pin (source) and the 3 rd pin (gate) of the MOS transistor Q4 and the MOS transistor Q8 is greater than the conduction condition of 4V, the MOS transistor Q2 disconnects the conduction of the MOS transistor Q4, and the positive output end V _ DUT + is pulled down to GNDL, which is equivalent to negative power output; MOS transistor Q9 turns off MOS transistor Q8 to make output negative terminal V _ DUT-GNDL have 12V potential difference, which is equivalent to positive power output, and at this moment, the voltage polarity is reversed.
The first protection terminal OC _ ISWP _ PC and the second protection terminal DIS _ VDUT are high level by default, at the moment, the switch diode D3 and the switch diode D4 are not conducted, when the system detects overcurrent, the pin of the first protection terminal OC _ ISWP _ PC outputs low level, the MOS transistor Q2 and the MOS transistor Q8 are disconnected, the circuit is protected to be safe, similarly, when the system detects overvoltage, the pin of the second protection terminal DIS _ VDUT outputs low level, the MOS transistor Q2 and the MOS transistor Q8 are disconnected, and output is cut off to achieve the purpose of protecting the circuit to be safe.
It should be noted that the present invention only protects the hardware circuit architecture, and does not protect the program control content.
Through the technical scheme, the utility model discloses a change first input control end SW _ R and second input control end SW _ F's high-low level can change the output voltage polarity, provide a changeable constant voltage power supply circuit of positive negative polarity of output, can satisfy the demand of special test scene.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (7)
1. A voltage-stabilized power supply circuit is characterized by comprising a resistor R, a MOS tube Q, a triode Q, a resistor R, a MOS tube Q, a resistor R, a triode Q, a resistor R and a MOS tube Q, wherein one end of the resistor R and one end of the resistor R are used as a first input control end SW _ R, the other end of the resistor R, one end of the resistor R, the source electrode of the MOS tube Q and the grid electrode of the MOS tube Q are all connected, the other end of the resistor R and the source electrode of the MOS tube Q are grounded, one end of the resistor R is connected with a power supply +5VL, the drain electrode of the MOS tube Q, the other end of the resistor R and the base electrode of the triode Q are connected and are used as a second input control end SW _ F, the collector electrode of the triode Q is connected with the source electrode of the MOS tube Q and one end of the resistor R, the other end of the resistor R, the grid electrode of the MOS tube Q and the grid electrode of the MOS tube Q are connected, the drain electrode of the MOS transistor Q2 is connected with the drain electrode of the MOS transistor Q4 and serves as an output positive terminal V _ DUT +;
one end of the resistor R19 is connected with an emitter of the triode Q6, and the other end of the resistor R19 and the grid of the MOS transistor Q4 are grounded; the grid electrode of the MOS tube Q8 is connected with one end of a resistor R24, the other end of the resistor R24, the source electrode of the MOS tube Q8 and the collector electrode of the triode Q10 are connected, the other end of the resistor R28 is connected with the base electrode of the triode Q10, and the emitter electrode of the triode Q10 is grounded through the resistor R33; the drain of the MOS transistor Q8 is connected to the drain of the MOS transistor Q9 as the negative output terminal V _ DUT-, the source of the MOS transistor Q9 is the second input control terminal SW _ F, and the gate of the MOS transistor Q9 is grounded.
2. A regulated power supply circuit according to claim 1, further comprising a switching diode D3 and a switching diode D4, wherein the first pin of the switching diode D3 is used as the first protection terminal OC _ ISWP _ PC, the first pin of the switching diode D4 is used as the second protection terminal DIS _ VDUT, and the second pin of the switching diode D3 and the second pin of the switching diode D4 are both connected to the drain of the MOS transistor Q7; the third pin of the switching diode D3 and the third pin of the switching diode D4 are both connected to the base of the transistor Q10.
3. A regulated power supply circuit according to claim 2, wherein the switching diode D3 and the switching diode D4 are each of BAV70W type.
4. A regulated power supply circuit according to claim 1 wherein the transistor Q6 and the transistor Q10 are each PMSTA 06.
5. A regulated power supply circuit according to claim 1 wherein MOS transistor Q2 and MOS transistor Q8 are each SQJ469 EP.
6. A regulated power supply circuit according to claim 1 wherein MOS transistor Q4 and MOS transistor Q9 are each SQJ402 EP.
7. A regulated power supply circuit according to claim 1 wherein the MOS transistor Q7 is of the PMF63UNEA type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120475689.9U CN214151531U (en) | 2021-03-04 | 2021-03-04 | Voltage-stabilized power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120475689.9U CN214151531U (en) | 2021-03-04 | 2021-03-04 | Voltage-stabilized power supply circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214151531U true CN214151531U (en) | 2021-09-07 |
Family
ID=77553940
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120475689.9U Active CN214151531U (en) | 2021-03-04 | 2021-03-04 | Voltage-stabilized power supply circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214151531U (en) |
-
2021
- 2021-03-04 CN CN202120475689.9U patent/CN214151531U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104577993B (en) | Switching Power Supply input voltage protection circuit | |
| CN101867168B (en) | Power protecting circuit and LED lamp | |
| CN107845998B (en) | Input power supply health detection and management circuit in power supply parallel redundancy system | |
| CN101562443A (en) | Overvoltage protection circuit and liquid crystal display device drive circuit | |
| CN108206517A (en) | A kind of low cost inputs anti-overvoltage crowbar | |
| CN206542179U (en) | A kind of load overcurrent overvoltage crowbar | |
| CN111316519A (en) | Backflow prevention circuit, power supply and backflow prevention method | |
| CN203339652U (en) | Interface protection circuit | |
| CN203734283U (en) | Power supply protection circuit and power supply device | |
| CN104035538A (en) | Main board protection circuit | |
| CN104345851A (en) | Power circuit | |
| CN214151531U (en) | Voltage-stabilized power supply circuit | |
| CN202978233U (en) | Direction-current power source protection device | |
| CN107147284A (en) | A kind of protection circuit and electric power system | |
| CN202455057U (en) | Power supply protecting circuit | |
| CN206850404U (en) | A kind of line under-voltage protection circuit with the input of retarding window wide scope | |
| CN210270805U (en) | Power protection module and computer | |
| CN107093886A (en) | It is a kind of to be embedded in solar powered network from the voltage security power supply circuit become in device | |
| CN211183377U (en) | Protection circuit and coronary artery analysis system | |
| CN103269154A (en) | Direct current bus capacitor automatic discharge circuit for power electronic equipment | |
| CN203522162U (en) | Undervoltage protection and overcurrent protection circuit | |
| CN209313724U (en) | A kind of voltage conversion circuit and driving device | |
| CN203660518U (en) | Insulated gate bipolar transistor overcurrent protection circuit | |
| CN215646145U (en) | Adjustable overvoltage and undervoltage protection circuit for mainboard power supply | |
| CN103107591A (en) | Power supply device and method of portable digital apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |