CN207369372U - A kind of Novel constant-flow source driving circuit - Google Patents
A kind of Novel constant-flow source driving circuit Download PDFInfo
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- CN207369372U CN207369372U CN201721421745.0U CN201721421745U CN207369372U CN 207369372 U CN207369372 U CN 207369372U CN 201721421745 U CN201721421745 U CN 201721421745U CN 207369372 U CN207369372 U CN 207369372U
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Abstract
The utility model discloses a kind of Novel constant-flow source driving circuit, including drive circuit, electric current gear switching circuit and regulator circuit, the drive circuit includes difference amplifier U7,4 serial capacitance C51 of the pin ground connection of difference amplifier U7, pin 7 series resistor R37 and resistance the R41 ground connection of difference amplifier U7, the pin 6 of difference amplifier U7 meet power input VCC5.Each MOS switch pipe is formed with three voltage detection units in this constant current source driving circuit, pass through the detection that the conducting voltage of each voltage detection unit is set to realize to voltage, the required supply voltage of automatic identification load, improve the efficiency of driving and reduce the fever of driving tube, voltage-stablizer U10 can carry out voltage stabilizing, prevent the self-oscillation in circuit, reduce the clutter of output, pass through measurement error caused by the switching circuit of switching capacity voltage changer IC2 reductions；Overall drive efficiency is high, and caloric value is low, and output clutter is low, can be adjusted in high precision with wide range.
Description
Technical field
Power drives equipment technical field is the utility model is related to, is specially a kind of Novel constant-flow source driving circuit.
Background technology
Constant-current source circuit has many uses, LED light source control, proportional valve control etc..But current constant current source driving circuit
(LED light source controller) is all big there are caloric value, and efficiency is low, the problems such as precision is low, therefore needs a kind of Novel constant-flow source driving electricity
Road.
Utility model content
The purpose of this utility model is to provide a kind of Novel constant-flow source driving circuit, has drive efficiency height, caloric value
Low, output clutter is low, the advantages of being adjusted in high precision with wide range, solves in the prior art that caloric value is big, efficiency is low, precision
The problem of low.
To achieve the above object, the utility model provides following technical solution：A kind of Novel constant-flow source driving circuit, including
Drive circuit, electric current gear switching circuit and regulator circuit, the drive circuit include difference amplifier U7, difference amplifier U7
4 serial capacitance C51 of pin ground connection, difference amplifier U7 pin 7 series resistor R37 and resistance R41 ground connection, difference amplifier
The pin 6 of U7 meets power input VCC5；The 8 series resistor R45 of pin and capacitance C31 and triode of the difference amplifier U7
The base stage of Q14, the output terminal of the emitter connecting resistance R45 of triode Q14, the input termination capacitor C32 and triode of capacitance C31
The emitter of Q14 simultaneously connects, and the collector of triode Q14 meets power end CH1；The base stage series resistor R27 of the triode Q14 with
The pin 7 of operational amplifier U8B is electrically connected, the 6 serial capacitance C47 of pin and resistance R31 and operation amplifier of operational amplifier U8B
The pin 7 of device U8B is electrically connected, and the output terminal of the input termination capacitor C30 and resistance R31 of capacitance C47 simultaneously connect, and capacitance C30's is defeated
Enter to hold series resistor R26 to be electrically connected with the pin 5 of difference amplifier U7；5 tandem electric inductance of pin of the operational amplifier U8B
The input terminal serial capacitance C52 and resistance R36 of FB1, inductance FB1 simultaneously connect the pin 5 of operational amplifier U8B, the output of inductance FB1
Shunt-wound capacitance C53 between the output terminal of end and capacitance C52；Output terminal series resistor R38, resistance R39 and the resistance of the resistance R45
R40 is electrically connected with the pin 1 of difference amplifier U7, and the pin 8 of difference amplifier U7 is electrically connected with the input terminal of resistance R38, electricity
The input terminal and connecting resistance R28 for hindering R38 are electrically connected with the pin 2 of operational amplifier U8A, the output terminal and connecting resistance of resistance R28
R24 is electrically connected with the pin 1 of operational amplifier U8A, and the 3 series resistor R29 of pin of operational amplifier U8A meets power end CH1, electricity
Hinder the output terminal of R29 and connecting resistance R33 ground connection；The drain electrode of the output termination MOS switch pipe Q2 of the resistance R38 is electrically connected, MOS
The source electrode of switching tube Q2 is electrically connected with the source electrode of MOS switch pipe Q4, the grid connecting resistance R34 and MOS switch pipe of MOS switch pipe Q2
The source electrode of Q2 is electrically connected, the input terminal of resistance R34 and the drain electrode for meeting MOS switch pipe Q5, the source electrode ground connection of MOS switch pipe Q5, MOS
The grid connecting resistance R54 of switching tube Q5 is electrically connected with the source electrode of MOS switch pipe Q5, the input terminal and connecting resistance R51 of resistance R54,
The input terminal and connecting resistance R47 of resistance R34 meet power end VCC；The drain electrode of the output termination MOS switch pipe Q3 of the resistance R39
Be electrically connected, MOS switch pipe Q3 source electrodes are electrically connected with the source electrode of MOS switch pipe Q6, the grid connecting resistance R35 of MOS switch pipe Q3 and
The source electrode of MOS switch pipe Q3 is electrically connected, the input terminal of resistance R35 and the source electrode ground connection for meeting MOS switch pipe Q6, MOS switch pipe Q6
Grid connecting resistance R55 be electrically connected with the source electrode of MOS switch pipe Q6, the input terminal of resistance R55 and connecting resistance R52, resistance R35's
Simultaneously connecting resistance R48 meets power end VCC to input terminal；The drain electrode of the output termination MOS switch pipe Q4 of the resistance is electrically connected, OS switches
Pipe Q4 source electrodes are electrically connected with the source electrode of MOS switch pipe Q7, the source of the grid connecting resistance R42 and MOS switch pipe Q4 of MOS switch pipe Q4
Pole is electrically connected, the input terminal of resistance R42 and the source electrode ground connection for meeting MOS switch pipe Q7, the grid connecting resistance R56 of MOS switch pipe Q7
It is electrically connected with the source electrode of MOS switch pipe Q7, the input terminal and connecting resistance R53 of resistance R56, the input terminal and connecting resistance of resistance R42
R49 meets power end VCC；Source electrode shunt-wound capacitance C77, resistance R60 and the resistance R59 and MOS switch pipe Q4 of the MOS switch pipe Q2
Source electrode be electrically connected；The electric current gear switching circuit includes switching capacity voltage changer IC2, switching capacity voltage changer
The 1 serial capacitance C73 of pin of IC2 is electrically connected with the pin 4 of switching capacity voltage changer IC2, and the input terminal of capacitance C73 simultaneously connects
Inductance L7 is grounded, and the output terminal shunt-wound capacitance C74 of inductance L7 is electrically connected with the output terminal of capacitance C73, switching capacity voltage transformation
The 3 serial capacitance C65 of pin of device IC2 is electrically connected with the pin 5 of switching capacity voltage changer IC2, switching capacity voltage transformation
The pin 2 of device IC2 connects power end VCC, the output termination capacitor C71 ground connection of power end VCC, the output terminal and capacitance of capacitance C71
The output terminal of C73 simultaneously connects；The regulator circuit includes voltage-stablizer U10, the 4 series resistor R75 of pin and capacitance of voltage-stablizer U10
The output terminal of the input termination capacitor C54 and capacitance C55 of C55 ground resistances R75 simultaneously connect；The pin 1 of the voltage-stablizer U10 connects electricity
The 2 tandem electric inductance L5 of pin of source VCC, voltage-stablizer U10 meet power end CH1, the output terminal of power end VCC shunt-wound capacitance successively
C56, capacitance C57 and capacitance C59 ground connection, output terminal series resistor R50 and resistance the R58 ground connection of power end CH1, resistance R50's
Shunt-wound capacitance C41 and capacitance C58 ground connection, the output terminal of inductance L5 simultaneously connect diode D9 ground connection to input terminal successively, voltage-stablizer U10's
Pin 3 and pin 5 are grounded.
Preferably, the model tps60403 of the switching capacity voltage changer IC2.
Preferably, the signal of the difference amplifier U7 is AD626ar.
Preferably, the model LM2576-REF of the voltage-stablizer U10.
Compared with prior art, the beneficial effects of the utility model are as follows：
The MOS switch pipe Q2 and MOS switch pipe Q5 of drive circuit are formed with voltage detecting list in this constant current source driving circuit
Member, MOS switch pipe Q3 and MOS switch pipe Q6 are formed with voltage detection unit, MOS switch pipe Q4 and MOS switch pipe Q7 form with
Voltage detection unit, the voltage swing that each voltage detection unit is turned on differ, by setting each voltage detection unit
For conducting voltage to realize the detection to voltage, the required supply voltage of automatic identification load, automatically adjusts the power supply of driving tube
Voltage, controls the pressure drop of driving tube in the numerical value of setting, improves the efficiency of driving and reduces the fever of driving tube, makes power drive
In the case that pipe is not required to radiation fin, the electric current output of ampere level can be reached, then supply voltage passes through in regulator circuit
Voltage-stablizer U10 carry out voltage stabilizing, the useful signal in negative-feedback circuit is fed back respectively with noise, noise negative-feedback, is controlled
Make in small range, the negative-feedback of variable phase, prevents the self-oscillation in circuit, advantageously reduces the clutter of constant-current source output, makes
The clutter that must be exported is controlled in very low level, then passes through the switching capacity voltage changer in electric current gear switching circuit
IC2, makes constant-current source realize that high accuracy is adjusted with wide range, measurement error caused by the switching circuit of reduction；Overall drive efficiency
Height, caloric value is low, and output clutter is low, can be adjusted in high precision with wide range.
Brief description of the drawings
Fig. 1 is the drive circuit figure of the utility model；
Fig. 2 is the electric current gear switching circuit figure of the utility model；
Fig. 3 is the regulator circuit figure of the utility model.
In figure：1 drive circuit, 2 electric current gear switching circuits, 3 regulator circuits.
Embodiment
The following is a combination of the drawings in the embodiments of the present utility model, and the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are without making creative work
All other embodiments obtained, shall fall within the protection scope of the present invention.
Please refer to Fig.1-3, a kind of Novel constant-flow source driving circuit, including drive circuit 1,2 and of electric current gear switching circuit
Regulator circuit 3, drive circuit 1 include difference amplifier U7, and the signal of difference amplifier U7 is AD626ar, difference amplifier U7
4 serial capacitance C51 of pin ground connection, difference amplifier U7 pin 7 series resistor R37 and resistance R41 ground connection, difference amplifier
The pin 6 of U7 meets power input VCC5；The pin 8 series resistor R45 and capacitance C31 and triode Q14 of difference amplifier U7
Base stage, the output terminal of the emitter connecting resistance R45 of triode Q14, the input termination capacitor C32 and triode Q14 of capacitance C31
Emitter and connect, the collector of triode Q14 meets power end CH1；Base stage series resistor R27 and the computing of triode Q14 is put
The pin 7 of big device U8B is electrically connected, the pin 6 serial capacitance C47 and resistance R31 and operational amplifier U8B of operational amplifier U8B
Pin 7 be electrically connected, the output terminal of the input termination capacitor C30 and resistance R31 of capacitance C47 simultaneously connect, the input terminal string of capacitance C30
Connecting resistance R26 is electrically connected with the pin 5 of difference amplifier U7；The pin 5 tandem electric inductance FB1, inductance FB1 of operational amplifier U8B
Input terminal serial capacitance C52 and resistance R36 and the pin 5 for meeting operational amplifier U8B, the output terminal of inductance FB1 and capacitance C52
Output terminal between shunt-wound capacitance C53；Output terminal series resistor R38, the resistance R39 and resistance R40 and difference amplifier of resistance R45
The pin 1 of U7 is electrically connected, and the pin 8 of difference amplifier U7 is electrically connected with the input terminal of resistance R38, and the input terminal of resistance R38 is simultaneously
Connecting resistance R28 is electrically connected with the pin 2 of operational amplifier U8A, the output terminal and connecting resistance R24 and operational amplifier of resistance R28
The pin 1 of U8A is electrically connected, and the 3 series resistor R29 of pin of operational amplifier U8A meets power end CH1, and the output terminal of resistance R29 is simultaneously
Connecting resistance R33 is grounded；The drain electrode of the output termination MOS switch pipe Q2 of resistance R38 is electrically connected, the source electrode and MOS of MOS switch pipe Q2
The source electrode of switching tube Q4 is electrically connected, and the grid connecting resistance R34 of MOS switch pipe Q2 is electrically connected with the source electrode of MOS switch pipe Q2, resistance
The input terminal of R34 and the drain electrode for meeting MOS switch pipe Q5, the source electrode ground connection of MOS switch pipe Q5, the grid of MOS switch pipe Q5 connect electricity
Resistance R54 is electrically connected with the source electrode of MOS switch pipe Q5, and the input terminal and connecting resistance R51 of resistance R54, the input terminal of resistance R34 simultaneously connect
Resistance R47 meets power end VCC；The drain electrode of the output termination MOS switch pipe Q3 of resistance R39 is electrically connected, MOS switch pipe Q3 source electrodes with
The source electrode of MOS switch pipe Q6 is electrically connected, and the grid connecting resistance R35 of MOS switch pipe Q3 is electrically connected with the source electrode of MOS switch pipe Q3,
The input terminal of resistance R35 and the source electrode ground connection for meeting MOS switch pipe Q6, the grid connecting resistance R55 and MOS switch of MOS switch pipe Q6
The source electrode of pipe Q6 is electrically connected, and the input terminal and connecting resistance R52 of resistance R55, the input terminal and connecting resistance R48 of resistance R35 connect power supply
Hold VCC；The drain electrode of the output termination MOS switch pipe Q4 of resistance is electrically connected, the source of MOS switch pipe Q4 source electrodes and MOS switch pipe Q7
Pole is electrically connected, and the grid connecting resistance R42 of MOS switch pipe Q4 is electrically connected with the source electrode of MOS switch pipe Q4, the input terminal of resistance R42
And the source electrode ground connection of MOS switch pipe Q7 is connect, the grid connecting resistance R56 and the source electrode of MOS switch pipe Q7 of MOS switch pipe Q7 are electrically connected
Connect, the input terminal and connecting resistance R53 of resistance R56, the input terminal and connecting resistance R49 of resistance R42 meet power end VCC；MOS switch pipe
Source electrode shunt-wound capacitance C77, resistance R60 and the resistance R59 of Q2 is electrically connected with the source electrode of MOS switch pipe Q4；Electric current gear switch electricity
Road 2 includes switching capacity voltage changer IC2, the model tps60403 of switching capacity voltage changer IC2, switching capacity electricity
The 1 serial capacitance C73 of pin of buckling parallel operation IC2 is electrically connected with the pin 4 of switching capacity voltage changer IC2, and capacitance C73's is defeated
Enter and hold and connect inductance L7 ground connection, the output terminal shunt-wound capacitance C74 of inductance L7 is electrically connected with the output terminal of capacitance C73, switching capacity
The 3 serial capacitance C65 of pin of voltage changer IC2 is electrically connected with the pin 5 of switching capacity voltage changer IC2, switching capacity
The pin 2 of voltage changer IC2 connects power end VCC, the output termination capacitor C71 ground connection of power end VCC, the output of capacitance C71
Hold the output terminal with capacitance C73 and connect；Regulator circuit 3 includes voltage-stablizer U10, the model LM2576-REF of voltage-stablizer U10, surely
The output of the input termination capacitor C54 and capacitance C55 of the 4 series resistor R75 of pin and capacitance C55 ground resistances R75 of depressor U10
Hold and connect；The pin 1 of voltage-stablizer U10 meets power end VCC, and the 2 tandem electric inductance L5 of pin of voltage-stablizer U10 connects power end CH1, power supply
Shunt-wound capacitance C56, capacitance C57 and capacitance C59 are grounded the output terminal of end VCC successively, the output terminal series resistor of power end CH1
R50 and resistance R58 ground connection, shunt-wound capacitance C41 and capacitance C58 is grounded the input terminal of resistance R50 successively, and the output terminal of inductance L5 is simultaneously
Diode D9 ground connection is connect, the pin 3 and pin 5 of voltage-stablizer U10 are grounded；The MOS of drive circuit 1 is opened in the constant current source driving circuit
Close pipe Q2 and MOS switch pipe Q5 to form with voltage detection unit, MOS switch pipe Q3 and MOS switch pipe Q6 compositions are with voltage detecting
Unit, MOS switch pipe Q4 and MOS switch pipe Q7 form the voltage turned on voltage detection unit, each voltage detection unit
It is not of uniform size, by the detection for setting the conducting voltage of each voltage detection unit to realize to voltage, automatic identification load
Required supply voltage, automatically adjusts the supply voltage of driving tube, controls the pressure drop of driving tube in the numerical value of setting, improves driving
Efficiency and reduce the fever of driving tube, make in the case that power drive pipe is not required to radiation fin, ampere level can be reached
Electric current exports, and then supply voltage carries out voltage stabilizing by the voltage-stablizer U10 in regulator circuit 3, effective in negative-feedback circuit
Signal is fed back respectively with noise, noise negative-feedback, is controlled in small range, the negative-feedback of variable phase, prevents circuit oneself
Induced Oscillation, advantageously reduces the clutter of constant-current source output so that the clutter of output is controlled in very low level, then passes through electricity
The switching capacity voltage changer IC2 in gear switch circuit 2 is flowed, constant-current source is realized that high accuracy is adjusted with wide range, reduces
Switching circuit caused by measurement error；Overall drive efficiency is high, and caloric value is low, and output clutter is low, can high accuracy and wide range
Adjust.
In summary：In this constant current source driving circuit drive circuit 1 MOS switch pipe Q2 and MOS switch pipe Q5 form with
Voltage detection unit, MOS switch pipe Q3 and MOS switch pipe Q6 are formed with voltage detection unit, MOS switch pipe Q4 and MOS switch
Pipe Q7 is formed with voltage detection unit, and the voltage swing that each voltage detection unit is turned on differs, by setting each voltage
The conducting voltage of detection unit to realize the detection to voltage, the required supply voltage of automatic identification load, drive by automatic adjustment
The supply voltage of dynamic pipe, controls the pressure drop of driving tube in the numerical value of setting, improves the efficiency of driving and reduces the fever of driving tube,
Make in the case that power drive pipe is not required to radiation fin, the electric current output of ampere level can be reached, then supply voltage passes through
Voltage-stablizer U10 in regulator circuit 3 carries out voltage stabilizing, and the useful signal in negative-feedback circuit is fed back respectively with noise, making an uproar
Sound negative-feedback, controls in small range, the negative-feedback of variable phase, prevents the self-oscillation in circuit, it is defeated to advantageously reduce constant-current source
The clutter gone out so that the clutter of output is controlled in very low level, then passes through the switch electricity in electric current gear switching circuit 2
Hold voltage changer IC2, constant-current source is realized that high accuracy is adjusted with wide range, measurement error caused by the switching circuit of reduction；
Overall drive efficiency is high, and caloric value is low, and output clutter is low, can be adjusted in high precision with wide range.
While there has been shown and described that the embodiment of the utility model, for the ordinary skill in the art,
It is appreciated that these embodiments can be carried out with a variety of changes in the case where not departing from the principle of the utility model and spirit, repaiied
Change, replace and modification, the scope of the utility model are defined by the appended claims and the equivalents thereof.
Claims (4)
1. a kind of Novel constant-flow source driving circuit, including drive circuit (1), electric current gear switching circuit (2) and regulator circuit
(3), it is characterised in that：The drive circuit (1) includes difference amplifier U7, the 4 serial capacitance C51 of pin of difference amplifier U7
Ground connection, pin 7 series resistor R37 and resistance the R41 ground connection of difference amplifier U7, it is defeated that the pin 6 of difference amplifier U7 connects power supply
Enter to hold VCC5；The base stage of the pin 8 series resistor R45 and capacitance C31 and triode Q14 of the difference amplifier U7, triode
The output terminal of the emitter connecting resistance R45 of Q14, the emitter of the input termination capacitor C32 and triode Q14 of capacitance C31 simultaneously connect,
The collector of triode Q14 meets power end CH1；The base stage series resistor R27's and operational amplifier U8B of the triode Q14
Pin 7 is electrically connected, the electricity of pin 7 of the pin 6 serial capacitance C47 and resistance R31 and operational amplifier U8B of operational amplifier U8B
Connection, the output terminal of the input termination capacitor C30 and resistance R31 of capacitance C47 simultaneously connect, the input terminal series resistor R26 of capacitance C30
It is electrically connected with the pin 5 of difference amplifier U7；The 5 tandem electric inductance FB1 of pin of the operational amplifier U8B, the input of inductance FB1
End serial capacitance C52 and resistance R36 simultaneously connects the pin 5 of operational amplifier U8B, the output terminal of inductance FB1 and the output of capacitance C52
Shunt-wound capacitance C53 between end；Output terminal series resistor R38, resistance R39 and the resistance R40 and difference amplifier U7 of the resistance R45
Pin 1 be electrically connected, the pin 8 of difference amplifier U7 is electrically connected with the input terminal of resistance R38, and the input terminal of resistance R38 simultaneously connects
Resistance R28 is electrically connected with the pin 2 of operational amplifier U8A, output terminal and connecting resistance R24 and the operational amplifier U8A of resistance R28
Pin 1 be electrically connected, the 3 series resistor R29 of pin of operational amplifier U8A meets power end CH1, and the output terminal of resistance R29 simultaneously connects
Resistance R33 is grounded；The drain electrode of the output termination MOS switch pipe Q2 of the resistance R38 is electrically connected, the source electrode of MOS switch pipe Q2 with
The source electrode of MOS switch pipe Q4 is electrically connected, and the grid connecting resistance R34 of MOS switch pipe Q2 is electrically connected with the source electrode of MOS switch pipe Q2,
The input terminal of resistance R34 and the drain electrode for meeting MOS switch pipe Q5, the source electrode ground connection of MOS switch pipe Q5, the grid of MOS switch pipe Q5
Connecting resistance R54 is electrically connected with the source electrode of MOS switch pipe Q5, the input terminal and connecting resistance R51 of resistance R54, the input terminal of resistance R34
And connecting resistance R47 meets power end VCC；The drain electrode of the output termination MOS switch pipe Q3 of the resistance R39 is electrically connected, MOS switch pipe
Q3 source electrodes are electrically connected with the source electrode of MOS switch pipe Q6, the source electrode of the grid connecting resistance R35 and MOS switch pipe Q3 of MOS switch pipe Q3
Be electrically connected, the input terminal of resistance R35 and connect MOS switch pipe Q6 source electrode ground connection, the grid connecting resistance R55 of MOS switch pipe Q6 with
The source electrode of MOS switch pipe Q6 is electrically connected, the input terminal and connecting resistance R52 of resistance R55, the input terminal and connecting resistance R48 of resistance R35
Meet power end VCC；The drain electrode of the output termination MOS switch pipe Q4 of the resistance is electrically connected, OS switching tube Q4 source electrodes and MOS switch
The source electrode of pipe Q7 is electrically connected, and the grid connecting resistance R42 of MOS switch pipe Q4 is electrically connected with the source electrode of MOS switch pipe Q4, resistance R42
Input terminal and connect MOS switch pipe Q7 source electrode ground connection, the source of the grid connecting resistance R56 and MOS switch pipe Q7 of MOS switch pipe Q7
Pole is electrically connected, and the input terminal and connecting resistance R53 of resistance R56, the input terminal and connecting resistance R49 of resistance R42 meet power end VCC；Institute
Source electrode shunt-wound capacitance C77, resistance R60 and the resistance R59 for stating MOS switch pipe Q2 are electrically connected with the source electrode of MOS switch pipe Q4；It is described
Electric current gear switching circuit (2) includes switching capacity voltage changer IC2, and the pin 1 of switching capacity voltage changer IC2 concatenates
Capacitance C73 is electrically connected with the pin 4 of switching capacity voltage changer IC2, and the input terminal of capacitance C73 simultaneously connects inductance L7 ground connection, electricity
The output terminal shunt-wound capacitance C74 of sense L7 is electrically connected with the output terminal of capacitance C73, and the pin 3 of switching capacity voltage changer IC2 is gone here and there
The pin 5 that capacitance C65 is met with switching capacity voltage changer IC2 is electrically connected, and the pin 2 of switching capacity voltage changer IC2 connects
The output termination capacitor C71 ground connection of power end VCC, power end VCC, the output terminal of capacitance C71 and the output terminal of capacitance C73 are simultaneously
Connect；The regulator circuit (3) includes voltage-stablizer U10, the 4 series resistor R75 of pin and capacitance C55 ground resistances of voltage-stablizer U10
The output terminal of the input termination capacitor C54 and capacitance C55 of R75 simultaneously connect；The pin 1 of the voltage-stablizer U10 meets power end VCC, surely
The 2 tandem electric inductance L5 of pin of depressor U10 meets power end CH1, the output terminal of power end VCC shunt-wound capacitance C56, capacitance C57 successively
And capacitance C59 ground connection, output terminal series resistor R50 and resistance the R58 ground connection of power end CH1, the input terminal of resistance R50 is successively simultaneously
Capacitance C41 and capacitance C58 ground connection is connect, the output terminal of inductance L5 simultaneously connects diode D9 ground connection, the pin 3 and pin 5 of voltage-stablizer U10
Ground connection.
A kind of 2. Novel constant-flow source driving circuit according to claim 1, it is characterised in that：The switching capacity voltage becomes
The model tps60403 of parallel operation IC2.
A kind of 3. Novel constant-flow source driving circuit according to claim 1, it is characterised in that：The difference amplifier U7's
Signal is AD626ar.
A kind of 4. Novel constant-flow source driving circuit according to claim 1, it is characterised in that：The type of the voltage-stablizer U10
Number it is LM2576-REF.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721421745.0U CN207369372U (en) | 2017-10-30 | 2017-10-30 | A kind of Novel constant-flow source driving circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721421745.0U CN207369372U (en) | 2017-10-30 | 2017-10-30 | A kind of Novel constant-flow source driving circuit |
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| Publication Number | Publication Date |
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| CN207369372U true CN207369372U (en) | 2018-05-15 |
Family
ID=62344646
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721421745.0U Active CN207369372U (en) | 2017-10-30 | 2017-10-30 | A kind of Novel constant-flow source driving circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108882462A (en) * | 2018-08-01 | 2018-11-23 | 常州市武进区半导体照明应用技术研究院 | LED driving light source and its driving method in a kind of biochemical substances detecting instrument based on optical means |
| CN109975616A (en) * | 2018-12-29 | 2019-07-05 | 浙江机电职业技术学院 | A kind of wide-range high-precision resistance meter |
-
2017
- 2017-10-30 CN CN201721421745.0U patent/CN207369372U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108882462A (en) * | 2018-08-01 | 2018-11-23 | 常州市武进区半导体照明应用技术研究院 | LED driving light source and its driving method in a kind of biochemical substances detecting instrument based on optical means |
| CN108882462B (en) * | 2018-08-01 | 2024-01-05 | 常州市武进区半导体照明应用技术研究院 | LED driving light source in biochemical substance detection instrument based on optical method and driving method thereof |
| CN109975616A (en) * | 2018-12-29 | 2019-07-05 | 浙江机电职业技术学院 | A kind of wide-range high-precision resistance meter |
| CN109975616B (en) * | 2018-12-29 | 2021-08-17 | 浙江机电职业技术学院 | Wide-range high-precision resistance tester |
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