CN204993059U - Constant voltage power supply's output current control output voltage's circuit - Google Patents
Constant voltage power supply's output current control output voltage's circuit Download PDFInfo
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- CN204993059U CN204993059U CN201520754991.2U CN201520754991U CN204993059U CN 204993059 U CN204993059 U CN 204993059U CN 201520754991 U CN201520754991 U CN 201520754991U CN 204993059 U CN204993059 U CN 204993059U
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- 230000001105 regulatory effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
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Abstract
The utility model provides a constant voltage power supply's output current control output voltage circuit, including devices such as operational amplifier, triode, optical coupler, steady voltage IC, inductance, resistance, its groundwork principle: operational amplifier U2 detects output load current through inductance L1, and rethread resistance R11, resistance R12, resistance R13 set for U2's trigger point, and break -make through control optical coupler OP2 influence triode Q1, triode Q2 by and last regulated output voltage's size switches on. In traditional constant voltage power supply, output voltage and load current are by fixed, and in real the application, the change that often has among a small circle causes power sharing nature relatively poor, and output voltage can be adjusted according to load current's change to this circuit.
Description
Technical field
The utility model relates to a kind of Energy control technical field, and the output current particularly relating to a kind of constant voltage source controls the circuit of output voltage
Background technology
Numerous electronic systems all be unable to do without power supply, and current most electronic product all adopts DC/DC chip or difference linear constant voltage regulator as power supply, uses to produce stabilized power source common-battery subsystem.But because DC/DC chip must pass through hardware adjustments technical parameter, controllability is low, and multiple voltage output cannot be realized, be difficult to realize intellectuality, function singleness.
And in actual life, output voltage has the change among a small circle, can cause power sharing poor, better can not adapt to the situation of different output voltage.
Utility model content
The utility model provides a kind of output current control voltage circuit of constant voltage source, and this circuit can carry out regulation output voltage according to the change of load current.
For achieving the above object, the utility model provides a kind of output current control voltage circuit of constant voltage source, comprise resistance R1, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, resistance R8, resistance R9, resistance R10, optical coupler OP1, triode Q1, triode Q2, voltage stabilizing ICU1, power supply side VCC, output end vo ut, inductance L 1, load R, one end of one end of described output end vo ut and load R, one end of inductance L 1, resistance R5 is electrically connected, the other end ground connection of load R, the other end of inductance L 1 and one end of resistance R2, one end of resistance R1 is electrically connected, the other end of resistance R2 and the positive pole of optical coupler OP1 are electrically connected, the negative pole of optical coupler OP1 and the negative electrode of voltage stabilizing ICU1 are electrically connected, the emitter and collector of optical coupler OP1 and one feeds back IC and is electrically connected, the other end of resistance R1 and one end of resistance R3, the emitter terminal of triode Q1 is electrically connected, the other end ground connection of resistance R3, the base terminal of triode Q1 and one end of resistance R8, one end of resistance R10 is electrically connected, the other end ground connection of resistance R10, the collector electrode of triode Q1 and one end of resistance R4 are electrically connected, the other end of resistance R4 and the base stage of triode Q2, one end of resistance R7 is electrically connected, the other end ground connection of resistance R7, the collector terminal of triode Q2 and the other end of resistance R5, the reference pole of voltage stabilizing ICU1, one end of resistance R6 is electrically connected, the other end ground connection of resistance R6, the plus earth of voltage stabilizing ICU1, the emitter terminal of triode Q2 and one end of resistance R9 are electrically connected, the other end ground connection of resistance R9, also comprise resistance R11, resistance R12, resistance R13, operational amplifier U1, triode U2, optical coupler OP2, one end B of resistance R11 and one end B of inductance L 1 is electrically connected, one end A of resistance R12 and the other end A of inductance L 1 is electrically connected, the other end of resistance R11 and the reverse input end of operational amplifier are electrically connected, the other end of resistance R12 and one end of resistance R13, the positive input of operational amplifier is electrically connected, the other end ground connection of resistance R13, the output of operational amplifier and the base stage of triode Q3 are electrically connected, the collector electrode of triode Q3 and the negative pole of optical coupler OP2 are electrically connected, the grounded emitter of triode Q3, the positive pole of optical coupler OP2 and power supply side are electrically connected, the emitter of optical coupler OP2 and the other end of resistance R8 are electrically connected, one end of the collector electrode of optical coupler OP2 and one end of resistance R1 and resistance R2 is electrically connected.
Preferably, the model of described voltage stabilizing ICU1 is 431 voltage stabilizing IC.
Preferably, described triode Q1 is PNP type triode, and described triode Q2 is NPN triode, and described triode Q3 is NPN type triode.
Preferably, the model of described optical coupler OP1, optical coupler OP2 is 817C.
Compared with prior art, the beneficial effects of the utility model:
In traditional constant voltage source, output voltage and load current are all fixed, and in real world applications, the change often had among a small circle causes power sharing poor, and this circuit can carry out regulation output voltage according to the change of load current.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the output current control voltage circuit of constant voltage source of the present utility model.
Embodiment
Below, by reference to the accompanying drawings and embodiment, the utility model is described further:
Shown in composition graphs 1, the output current of the constant voltage source of the present embodiment controls output voltage circuit and comprises resistance R1, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, resistance R8, resistance R9, resistance R10, optical coupler OP1, triode Q1, triode Q2, voltage stabilizing ICU1, power supply side VCC, output end vo ut, inductance L 1, load R, resistance R11, resistance R12, resistance R13, operational amplifier U1, triode U2, optical coupler OP2, one end of described output end vo ut and load R, one end of inductance L 1, one end of resistance R5 is electrically connected, the other end ground connection of load R, the other end of inductance L 1 and one end of resistance R2, one end of resistance R1 is electrically connected, the other end of resistance R2 and the positive terminal 1 of optical coupler OP1 are electrically connected, the negative pole end 2 of optical coupling pipe OP1 is electrically connected with the cathode terminal A of voltage stabilizing ICU1, the effect of isolation is mainly played in the effect of optical coupler OP1, that voltage stabilizing ICU1 is 431 voltage stabilizing IC, emitter terminal 3 and the collector terminal 4 of optical coupler OP1 are electrically connected with the feedback end of the main IC in side, the effect of connection feedback end is the change in order to moment monitoring voltage exports, to make main IC make corresponding adjustment, thus reach the object of constant voltage.The other end of resistance R1 and one end of resistance R3, the emitter terminal of triode Q1 is electrically connected, triode Q1 is PNP type triode, the other end ground connection of resistance R3, the base terminal of triode Q1 and one end of resistance R8, one end of resistance R10 is electrically connected, the other end ground connection of resistance R10, the collector electrode of triode Q1 and one end of resistance R4 are electrically connected, the other end of resistance R4 and the base stage of triode Q2, one end of resistance R7 is electrically connected, the other end ground connection of resistance R7, the collector terminal of triode Q2 and the other end of resistance R5, the extreme R of reference of voltage stabilizing ICU1, one end of resistance R6 is electrically connected, the other end ground connection of resistance R6, the anode tap K ground connection of voltage stabilizing ICU1, the emitter terminal of triode Q2 and one end of resistance R9 are electrically connected, triode Q2 is NPN type triode, the other end ground connection of resistance R9, one end of resistance R11 and one end of inductance L 1 are electrically connected, one end of resistance R12 and the other end of inductance L 1 are electrically connected, B in figure represents that one end of inductance L 1 is connected with the reverse input end 1 of operational amplifier U2 by resistance R11, A represents that the other end of inductance L 1 is connected with the positive input 2 of operational amplifier U2 by resistance R12, the other end of resistance R11 and the reverse input end 1 of operational amplifier are electrically connected, the other end of resistance R12 and one end of resistance R13, the positive input 2 of operational amplifier is electrically connected, the other end ground connection of resistance R13, positive power source terminal 4 and the power supply side VCC of described operational amplifier are electrically connected, the output 3 of operational amplifier is electrically connected with the base stage of triode Q3, triode Q3 is NPN type triode, the collector electrode of triode Q3 and the negative pole end 2 of optical coupler OP2 are electrically connected, the grounded emitter of triode Q3, positive terminal 1 and the power supply side of optical coupler OP2 are electrically connected, the emitter terminal 3 of optical coupler OP2 is electrically connected with the other end of resistance R8, the collector terminal 4 of optical coupler OP2 is electrically connected with one end of resistance R1 and one end of resistance R2.
The operation principle of the present embodiment:
Operational amplifier U2 detects output load current by inductance L 1, then sets the trigger point of U2 by resistance R11, resistance R12, resistance R13.
When operational amplifier U2 do not reach trigger point time, corresponding triode Q3 ends, so also can cause the emitter terminal 3 of optical coupler OP2 and collector terminal 4 obstructed, now the voltage of C point is close to 0V, and the voltage of D point is by after resistance R1, resistance R3 dividing potential drop, known V
dbe greater than V
c, now for PNP type triode Q1 conducting.The base stage high potential of triode Q2, therefore triode Q2 also conducting, the output voltage of output end vo ut is now determined by resistance R5, resistance R6, resistance R9.
After operational amplifier U2 reaches trigger point, the base stage high level of triode Q3, now triode Q3 conducting, the emitter terminal 3 of corresponding optical coupler OP2 and collector terminal 4 conducting, by the dividing potential drop effect of resistance R1, R3 and R8, R10, make the voltage of C point be greater than the voltage of D point, therefore triode Q1 ends, triode Q2 ends, and the output voltage of output end vo ut is now by resistance R5, and resistance R6 determines.
To one skilled in the art, according to technical scheme described above and design, other various corresponding change and deformation can be made, and all these change and deformation all should belong within the protection range of the utility model claim.
Claims (4)
1. the output current of a constant voltage source controls output voltage circuit, comprise resistance R1, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, resistance R8, resistance R9, resistance R10, optical coupler OP1, triode Q1, triode Q2, voltage stabilizing ICU1, power supply side VCC, output end vo ut, inductance L 1, load R, one end of one end of described output end vo ut and load R, one end of inductance L 1, resistance R5 is electrically connected, the other end ground connection of load R, the other end of inductance L 1 and one end of resistance R2, one end of resistance R1 is electrically connected, the other end of resistance R2 and the positive pole of optical coupler OP1 are electrically connected, the negative pole of optical coupler OP1 and the negative electrode of voltage stabilizing ICU1 are electrically connected, the emitter and collector of optical coupler OP1 and one feeds back IC and is electrically connected, the other end of resistance R1 and one end of resistance R3, the emitter terminal of triode Q1 is electrically connected, the other end ground connection of resistance R3, the base terminal of triode Q1 and one end of resistance R8, one end of resistance R10 is electrically connected, the other end ground connection of resistance R10, the collector electrode of triode Q1 and one end of resistance R4 are electrically connected, the other end of resistance R4 and the base stage of triode Q2, one end of resistance R7 is electrically connected, the other end ground connection of resistance R7, the collector terminal of triode Q2 and the other end of resistance R5, the reference pole of voltage stabilizing ICU1, one end of resistance R6 is electrically connected, the other end ground connection of resistance R6, the plus earth of voltage stabilizing ICU1, the emitter terminal of triode Q2 and one end of resistance R9 are electrically connected, the other end ground connection of resistance R9, it is characterized in that, also comprise resistance R11, resistance R12, resistance R13, operational amplifier U1, triode U2, optical coupler OP2, one end of resistance R11 and one end of inductance L 1 are electrically connected, one end of resistance R12 and the other end of inductance L 1 are electrically connected, the other end of resistance R11 and the reverse input end of operational amplifier are electrically connected, the other end of resistance R12 and one end of resistance R13, the positive input of operational amplifier is electrically connected, the other end ground connection of resistance R13, positive power source terminal and the power supply side VCC of described operational amplifier are electrically connected, the output of operational amplifier and the base stage of triode Q3 are electrically connected, the collector electrode of triode Q3 and the negative pole of optical coupler OP2 are electrically connected, the grounded emitter of triode Q3, the positive pole of optical coupler OP2 and power supply side are electrically connected, the emitter of optical coupler OP2 and the other end of resistance R8 are electrically connected, one end of the collector electrode of optical coupler OP2 and one end of resistance R1 and resistance R2 is electrically connected.
2. the output current of constant voltage source as claimed in claim 1 controls output voltage circuit, and it is characterized in that, the model of described voltage stabilizing ICU1 is 431 voltage stabilizing IC.
3. the output current of constant voltage source as claimed in claim 1 controls output voltage circuit, and it is characterized in that, described triode Q1 is PNP type triode, and described triode Q2 is NPN triode, and described triode Q3 is NPN type triode.
4. the output current of constant voltage source as claimed in claim 1 controls output voltage circuit, and it is characterized in that, the model of described optical coupler OP1, optical coupler OP2 is 817C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520754991.2U CN204993059U (en) | 2015-09-25 | 2015-09-25 | Constant voltage power supply's output current control output voltage's circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520754991.2U CN204993059U (en) | 2015-09-25 | 2015-09-25 | Constant voltage power supply's output current control output voltage's circuit |
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| CN204993059U true CN204993059U (en) | 2016-01-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108226593A (en) * | 2016-12-15 | 2018-06-29 | 成都长城开发科技有限公司 | Electric energy meter and its anti-electricity-theft detection method |
-
2015
- 2015-09-25 CN CN201520754991.2U patent/CN204993059U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108226593A (en) * | 2016-12-15 | 2018-06-29 | 成都长城开发科技有限公司 | Electric energy meter and its anti-electricity-theft detection method |
| CN108226593B (en) * | 2016-12-15 | 2024-04-19 | 成都长城开发科技股份有限公司 | Electric energy meter and electricity larceny prevention detection method thereof |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180213 Address after: Sha Tin Town 523000 Guangdong city of Dongguan province Qi Village Ferry Road Xintai Industrial Park building B Patentee after: Dongguan St. Parkinson Electronics Co. Ltd. Address before: 523000 Guangdong Province, Dongguan city Humen town Xinlian Industrial Zone Patentee before: Sampo Electric (Dongguan) Co., Ltd. |