CN204480104U - A kind of constant power output circuit - Google Patents
A kind of constant power output circuit Download PDFInfo
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- CN204480104U CN204480104U CN201520053724.2U CN201520053724U CN204480104U CN 204480104 U CN204480104 U CN 204480104U CN 201520053724 U CN201520053724 U CN 201520053724U CN 204480104 U CN204480104 U CN 204480104U
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- resistance
- detection module
- voltage
- operational amplifier
- circuit
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Abstract
The utility model discloses a kind of constant power output circuit, comprising the current detection module for detecting DC current values; For detecting the voltage detection module of DC voltage value; For detecting the power detection module of direct-voltage power value; For exporting the control module of control voltage according to DC current values, DC voltage value and direct-voltage power value; For the on-off circuit according to control voltage control inputs voltage turn-on or closedown; Control module is connected with on-off circuit, and on-off circuit is connected with current detection module, voltage detection module and power detection module, and control module is connected with current detection module, voltage detection module and power detection module.The utility model, by described constant power output circuit, enhances the reliability of constant power output circuit.
Description
Technical field
The utility model relates to power monitoring field, particularly a kind of constant power output circuit.
Background technology
A lot of electronic equipment has individual rated current, does not allow to exceed rated current, not so can burn out equipment.So some equipment has just done overcurrent protection module, when electric current exceedes setting electric current time, equipment auto-breaking, proterctive equipment, to have realized overcurrent protection.Meanwhile, when the supply voltage of protected circuit is higher than certain numerical value, protector cuts off this circuit, and when supply voltage returns to normal range, protector is connected automatically, to realize overvoltage protection.
But in the prior art, when current foldback circuit or overvoltage crowbar damage, equipment still can be burned, and the reliability of circuit is not high.
Summary of the invention
The utility model embodiment provides a kind of constant power output circuit, is intended to solve the low problem of existing constant power output circuit reliability.
The utility model embodiment provides a kind of constant power output circuit, comprising:
For detecting the current detection module of DC current values;
For detecting the voltage detection module of DC voltage value;
For detecting the power detection module of direct-voltage power value;
For exporting the control module of control voltage according to described DC current values, described DC voltage value and described direct-voltage power value;
For the on-off circuit according to described control voltage control inputs voltage turn-on or closedown;
Described control module is connected with described on-off circuit, described on-off circuit is connected with described current detection module, described voltage detection module and described power detection module, and described control module is connected with described current detection module, described voltage detection module and described power detection module.
The beneficial effect that the technical scheme that the utility model provides is brought is:
From above-mentioned the utility model embodiment, owing to detecting DC current values by current detection module, voltage detection module detects DC voltage value, power detection module detects direct-voltage power value, control module exports control voltage according to described DC current values, described DC voltage value and described direct-voltage power value, on-off circuit, according to described control voltage control inputs voltage turn-on or cut out, therefore, enhances the reliability of constant power output circuit.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the utility model embodiment, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of a kind of constant power output circuit of the utility model;
Fig. 2 is the circuit theory diagrams of a kind of constant power output circuital current of the utility model detection module;
Fig. 3 is the circuit theory diagrams of a kind of constant power output circuit voltage of the utility model detection module;
Fig. 4 is the circuit theory diagrams of a kind of constant power output circuit power of the utility model detection module;
Fig. 5 is the circuit theory diagrams of a kind of constant power output circuit control module of the utility model;
Fig. 6 is the circuit theory diagrams of a kind of constant power output circuitry switching circuitry of the utility model.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearly, below in conjunction with accompanying drawing, the utility model embodiment is described in further detail.
The structural representation of a kind of constant power output circuit of the utility model, see Fig. 1, comprising: for detecting the current detection module 01 of DC current values; For detecting the voltage detection module 02 of DC voltage value; For detecting the power detection module 03 of direct-voltage power value; For exporting the control module 04 of control voltage according to DC current values, DC voltage value and direct-voltage power value; For the on-off circuit 05 according to control voltage control inputs voltage turn-on or closedown; Control module 04 is connected with on-off circuit 05, and on-off circuit 05 is connected with current detection module 01, voltage detection module 02 and power detection module 03, and control module 04 is connected with current detection module 01, voltage detection module 02 and power detection module 03.
See Fig. 2, current detection module comprises the first operational amplifier U4B, the first diode D3, the first resistance R10 and the second resistance R11.
The in-phase input end of the first operational amplifier U4B is connected with the first end of the first resistance R10, second end of the first resistance R10 is the first input end of current detection module, the output terminal of the first operational amplifier U4B is connected with the positive pole of the first diode D3, and the negative pole of the first diode D3 is the output terminal of current detection module; The inverting input of the first operational amplifier U4B is connected with the first end of the second resistance R11, and second end of the second resistance R11 is the second input end of current detection module.。
See Fig. 3, voltage detection module comprises the second operational amplifier U2B, the second diode D2, the 3rd resistance R8 and the 4th resistance R9.
The in-phase input end of the second operational amplifier U2B is connected with the first end of the 3rd resistance R8, second end of the 3rd resistance R8 is the first input end of voltage detection module, the output terminal of the second operational amplifier U2B is connected with the positive pole of the second diode D2, and the negative pole of the second diode D2 is the output terminal of voltage detection module; The inverting input of the second operational amplifier U2B is connected with the first end of the 4th resistance R9, and second end of the 4th resistance R9 is the second input end of voltage detection module.
See Fig. 4, power detection module comprises multiplier U5 and the 3rd diode D4.
The first input end of multiplier U5 is the first input end of power detection module, second input end of multiplier U5 is the second input end of power detection module, the output terminal of multiplier U5 is connected with the positive pole of the 3rd diode D4, and the negative pole of the 3rd diode D4 is the output terminal of power detection module.
See Fig. 5, control module comprises the 3rd operational amplifier U3B, optocoupler U4, the first field effect transistor Q2, the 5th resistance R13, the 6th resistance R12 and the 7th resistance R7.
The inverting input of the 3rd operational amplifier U3B is the first input end of control module, the normal phase input end of the 3rd operational amplifier U3B is the second input end of control module, the output terminal of the 3rd operational amplifier U3B is connected with the grid of the first field effect transistor Q2, the source electrode of the first field effect transistor Q2 is connected with the first end of the 6th resistance R12, second end of the 6th resistance R12 is the 3rd input end of control module, the drain electrode of the first field effect transistor Q2 is connected with the negative pole of optocoupler U4, the positive pole of optocoupler U4 is connected with the first end of the 7th resistance R7, second end of the 7th resistance R7 is the four-input terminal of control module, the emitter of optocoupler U4 is connected with power supply ground, the collector of optocoupler U4 and the first end of the 5th resistance R13 are the output terminal of control module, second end of the 5th resistance R13 is connected with the first power supply.
See Fig. 6, on-off circuit comprises four-operational amplifier U1B, the second field effect transistor Q1, the 4th diode D1, inductance L 1, first electric capacity C01, the second electric capacity C02, the 3rd electric capacity C1, the 4th electric capacity C2, the 8th resistance R1, the 9th resistance R2, the tenth resistance R3, the 11 resistance R4, the 12 resistance R5 and the 13 resistance R6.
The drain electrode of the second field effect transistor Q1, the first end of the first electric capacity C01, the first end of the second electric capacity C02 is the first input end of on-off circuit, second end of the first electric capacity C01 and second end of the second electric capacity C02 are connected to power supply ground altogether, the grid of the second field effect transistor Q1 is the second input end of on-off circuit, the source electrode of the second field effect transistor Q1 is connected with the negative pole of the 4th diode D1 and the first end of inductance L 1, the positive pole of the 4th diode D1, the first end of the 3rd electric capacity C1, the first end of the 4th electric capacity C2, the first end of the 9th resistance R2 is the first output terminal of on-off circuit, second end of inductance L 1 and second end of the 3rd electric capacity C1, second end of the 4th electric capacity C2, the first end of the 8th resistance R1, the first end of the tenth resistance R3 is connected with the first end of the 11 resistance R4, second end of the tenth resistance R3 and the first end of the 12 resistance R5 are the second output terminal of on-off circuit, second end of the 8th resistance R1 and second end of the 9th resistance R2 are the 3rd output terminal of on-off circuit, the inverting input of four-operational amplifier U1B is connected with second end of the 11 resistance R4, the normal phase input end of four-operational amplifier U1B is connected with second end of the 12 resistance R5 and the first end of the 13 resistance R6, the output terminal of four-operational amplifier U1B and second end of the 13 resistance R6 are the 4th output terminal of on-off circuit.
The utility model detects DC current values by current detection module, voltage detection module detects DC voltage value, power detection module detects direct-voltage power value, control module exports control voltage according to DC current values, DC voltage value and direct-voltage power value, on-off circuit is according to control voltage control inputs voltage turn-on or cut out, therefore, the reliability of constant power output circuit is enhanced.
Above-mentioned the utility model embodiment sequence number, just to describing, does not represent the quality of embodiment.
One of ordinary skill in the art will appreciate that all or part of step realizing above-described embodiment can have been come by hardware, the hardware that also can carry out instruction relevant by program completes, described program can be stored in a kind of computer-readable recording medium, the above-mentioned storage medium mentioned can be ROM (read-only memory), disk or CD etc.
The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (6)
1. a constant power output circuit, is characterized in that, comprising:
For detecting the current detection module of DC current values;
For detecting the voltage detection module of DC voltage value;
For detecting the power detection module of direct-voltage power value;
For exporting the control module of control voltage according to described DC current values, described DC voltage value and described direct-voltage power value;
For the on-off circuit according to described control voltage control inputs voltage turn-on or closedown;
Described control module is connected with described on-off circuit, described on-off circuit is connected with described current detection module, described voltage detection module and described power detection module, and described control module is connected with described current detection module, described voltage detection module and described power detection module.
2. constant power output circuit according to claim 1, is characterized in that, described current detection module comprises the first operational amplifier, the first diode, the first resistance and the second resistance;
The in-phase input end of described first operational amplifier is connected with the first end of described first resistance, second end of described first resistance is the first input end of described current detection module, the output terminal of described first operational amplifier is connected with the positive pole of described first diode, and the negative pole of described first diode is the output terminal of described current detection module; The inverting input of described first operational amplifier is connected with the first end of described second resistance, and the second end of described second resistance is the second input end of described current detection module.
3. constant power output circuit according to claim 1, is characterized in that, described voltage detection module comprises the second operational amplifier, the second diode, the 3rd resistance and the 4th resistance;
The in-phase input end of described second operational amplifier is connected with the first end of described 3rd resistance, second end of described 3rd resistance is the first input end of described voltage detection module, the output terminal of described second operational amplifier is connected with the positive pole of described second diode, and the negative pole of described second diode is the output terminal of described voltage detection module; The inverting input of described second operational amplifier is connected with the first end of described 4th resistance, and the second end of described 4th resistance is the second input end of described voltage detection module.
4. constant power output circuit according to claim 1, is characterized in that, described power detection module comprises multiplier and the 3rd diode;
The first input end of described multiplier is the first input end of described power detection module, second input end of described multiplier is the second input end of described power detection module, the output terminal of described multiplier is connected with the positive pole of described 3rd diode, and the negative pole of described 3rd diode is the output terminal of described power detection module.
5. constant power output circuit according to claim 1, is characterized in that, described control module comprises the 3rd operational amplifier, optocoupler, the first field effect transistor, the 5th resistance, the 6th resistance and the 7th resistance;
The inverting input of described 3rd operational amplifier is the first input end of described control module, the normal phase input end of described 3rd operational amplifier is the second input end of described control module, the output terminal of described 3rd operational amplifier is connected with the grid of described first field effect transistor, the source electrode of described first field effect transistor is connected with the first end of described 6th resistance, second end of described 6th resistance is the 3rd input end of described control module, the drain electrode of described first field effect transistor is connected with the negative pole of described optocoupler, the positive pole of described optocoupler is connected with the first end of the 7th resistance, second end of described 7th resistance is the four-input terminal of described control module, the emitter of described optocoupler is connected with power supply ground, the collector of described optocoupler and the first end of described 5th resistance are the output terminal of described control module, second end of described 5th resistance is connected with the first power supply.
6. constant power output circuit according to claim 1, it is characterized in that, described on-off circuit comprises four-operational amplifier, the second field effect transistor, the 4th diode, inductance, the first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity, the 8th resistance, the 9th resistance, the tenth resistance, the 11 resistance, the 12 resistance and the 13 resistance;
The drain electrode of described second field effect transistor, the first end of described first electric capacity, the first end of described second electric capacity is the first input end of described on-off circuit, second end of described first electric capacity and the second end of described second electric capacity are connected to power supply ground altogether, the grid of described second field effect transistor is the second input end of described on-off circuit, the source electrode of described second field effect transistor is connected with the described negative pole of the 4th diode and the first end of described inductance, the positive pole of described 4th diode, the first end of described 3rd electric capacity, the first end of described 4th electric capacity, the first end of described 9th resistance is the first output terminal of described on-off circuit, second end of described inductance and the second end of described 3rd electric capacity, second end of described 4th electric capacity, the first end of described 8th resistance, the first end of described tenth resistance is connected with the first end of described 11 resistance, second end of described tenth resistance and the first end of described 12 resistance are the second output terminal of described on-off circuit, second end of described 8th resistance and the second end of described 9th resistance are the 3rd output terminal of described on-off circuit, the inverting input of described four-operational amplifier is connected with the second end of described 11 resistance, the normal phase input end of described four-operational amplifier is connected with the second end of described 12 resistance and the first end of described 13 resistance, the output terminal of described four-operational amplifier and the second end of described 13 resistance are the 4th output terminal of described on-off circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520053724.2U CN204480104U (en) | 2015-01-26 | 2015-01-26 | A kind of constant power output circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520053724.2U CN204480104U (en) | 2015-01-26 | 2015-01-26 | A kind of constant power output circuit |
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| Publication Number | Publication Date |
|---|---|
| CN204480104U true CN204480104U (en) | 2015-07-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520053724.2U Expired - Fee Related CN204480104U (en) | 2015-01-26 | 2015-01-26 | A kind of constant power output circuit |
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| CN (1) | CN204480104U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108400703A (en) * | 2017-02-04 | 2018-08-14 | 中兴通讯股份有限公司 | Veneer slow starting control circuit and method |
| CN113131589A (en) * | 2021-05-24 | 2021-07-16 | 山西暗石电子技术有限公司 | Constant power supply module and integrated circuit |
-
2015
- 2015-01-26 CN CN201520053724.2U patent/CN204480104U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108400703A (en) * | 2017-02-04 | 2018-08-14 | 中兴通讯股份有限公司 | Veneer slow starting control circuit and method |
| CN113131589A (en) * | 2021-05-24 | 2021-07-16 | 山西暗石电子技术有限公司 | Constant power supply module and integrated circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150715 Termination date: 20200126 |
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| CF01 | Termination of patent right due to non-payment of annual fee |