CN106332357A - Photoelectric sensor driving circuit - Google Patents
Photoelectric sensor driving circuit Download PDFInfo
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- CN106332357A CN106332357A CN201610811839.2A CN201610811839A CN106332357A CN 106332357 A CN106332357 A CN 106332357A CN 201610811839 A CN201610811839 A CN 201610811839A CN 106332357 A CN106332357 A CN 106332357A
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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Abstract
The invention provides a photoelectric sensor driving circuit, which comprises an RC filter circuit for extracting a DC component in a PWM pulse signal, a voltage amplification circuit for outputting voltage of regulation current, a current control circuit for controlling output current and a current adjustment loop for converting the output current to the PWM pulse signal, wherein the RC filter circuit is connected with the voltage amplification circuit; the voltage amplification circuit is connected with the current control circuit; and the current control circuit is connected with the current adjustment loop. The photoelectric sensor driving control is simple, easy to realize and good in adjustment real-time performance, the dirt resistance of the sensor is good, and the service life of the sensor can be prolonged.
Description
Technical field
The present embodiments relate to the technical field of photoelectric sensor, particularly relate to the driving electricity of a kind of photoelectric sensor
Road.
Background technology
Photoelectric sensor generally uses current constant mode to drive, and the electric current of constant-current driving is conditional, excessive driving electricity
The life-span of sensor is had an impact by stream, owing to driving electric current limited, so in the case of sensor is dirtier, just cannot provide bigger
Drive electric current ensure the stain of sensor.
Summary of the invention
The purpose of the embodiment of the present invention is to propose the drive circuit of a kind of photoelectric sensor, it is intended to solve the most square
Just realize photoelectric sensor is driven the control of electric current.
For reaching this purpose, the embodiment of the present invention by the following technical solutions:
First aspect, the drive circuit of a kind of photoelectric sensor, described drive circuit includes:
For extracting the RC filter circuit of the flip-flop of pwm pulse signal, for exporting the electricity of the voltage of regulation and control electric current
Press increasing circuitry, for controlling to export the current control circuit of electric current and for according to being converted to by described output electric current
The current regulation loops of pwm pulse signal；
Described RC filter circuit is connected with described voltage amplification circuit, and described voltage amplification circuit controls electricity with described electric current
Road connects, and described current control circuit is connected with described current regulation loops.
Preferably, described RC filter circuit includes one-level RC filter circuit and two grades of RC filter circuits, and described one-level RC is filtered
Wave circuit includes that resistance R1 and electric capacity C1, described two grades of RC filter circuits include resistance R2 and electric capacity C2；
One end of described resistance R1 connects schmitt inverter, and the other end of described resistance R1 connects the one of described electric capacity C1
End, the other end ground connection of described electric capacity C1；
One end of described electric capacity C1 connects the normal phase input end of the first operational amplifier, bearing of described first operational amplifier
Phase input connects the outfan of described comparator；
One end of described resistance R2 connects the outfan of described first operational amplifier, and the other end of described resistance R2 connects
One end of described electric capacity C2, the other end ground connection of described electric capacity C2.
One end of described resistance R2 connects the outfan of described comparator, and the other end of described resistance R2 connects described electric capacity
One end of C2, the other end ground connection of described electric capacity C2.
Preferably, DC voltage amplitude V=Vp*D of one end output of described electric capacity C2；Wherein, described Vp is pulse width
Degree, described D is pwm pulse dutycycle.
Preferably, described voltage amplification circuit includes discharge circuit, and the input of described discharge circuit connects DC voltage
Signal and biasing input signal, described discharge circuit is after carrying out negative feedback amplification to described d. c. voltage signal, and output is adjusted
The voltage of control electric current.
Preferably, described discharge circuit includes the second operational amplifier, the negative-phase input of described second operational amplifier
Connecting one end of resistance R5, the other end of described resistance R5 connects described d. c. voltage signal；Described second operational amplifier
Normal phase input end connects one end of resistance R3, and the other end of described resistance R3 connects working power；
The normal phase input end of described second operational amplifier connects one end of resistance R4, another termination of described resistance R4
Ground；
The negative-phase input of described second operational amplifier connects one end and one end of electric capacity C3, the described resistance of resistance R6
The other end of R6 connects the outfan of described second operational amplifier, and electric capacity C3 is connected in parallel with described resistance R6.
Preferably, described current control circuit includes that the 3rd operational amplifier and pliotron, described 3rd computing are put
Big device is used for comparing, and described pliotron is used for providing electric current to drive；
When the magnitude of voltage of described current control circuit is higher than pre-determined threshold voltage threshold, described 3rd operational amplifier is defeated
Going out low-voltage, described pliotron ends；
When the magnitude of voltage of described current control circuit is less than described pre-determined threshold voltage threshold, described 3rd operation amplifier
Device output HIGH voltage, the conducting of described pliotron, output driving current, and the size of described driving current value and described electric current
The magnitude of voltage of control circuit is inversely.
Preferably, the negative-phase input of described 3rd operational amplifier connects the outfan of the second operational amplifier, described
The normal phase input end of the 3rd operational amplifier connects one end of resistance R7, one end of resistance R8 and one end of electric capacity C4, described electricity
The other end ground connection of resistance R7, the other end of described resistance R8 and the other end of described resistance C4 connect one end of resistance R9, described
The other end of resistance R9 connects working power, and electric capacity C4 is connected in parallel with described resistance R8；
The outfan of described 3rd operational amplifier connects one end of resistance R11, and the other end of described resistance R11 connects institute
State the base stage of pliotron；The colelctor electrode of described pliotron connects one end of described resistance R9；Described pliotron
Emitter stage connect resistance R10 one end；
The other end of described resistance R10 connects sensor luminous tube, and multiple described sensor luminous tubes are connected in series, described
The luminous tube number of sensor luminous tube series connection is not more than 8.
Preferably, described current regulation loops is input to the A/D interface of MCU after being amplified by small sampled voltage
Carrying out analog digital conversion, the electric current flow through is controlled by described MCU, and feeds back in the pulsewidth of described pwm pulse signal.
Preferably, described current regulation loops includes four-operational amplifier, and the positive of described four-operational amplifier is defeated
Enter end connect one end of resistance Rs and drive electric current, the other end ground connection of described resistance Rs；
The negative-phase input of described four-operational amplifier connects one end of resistance R12, one end of resistance R13, described electricity
The other end ground connection of resistance R12, the other end of described resistance R13 connects the outfan of described four-operational amplifier；
The outfan of described four-operational amplifier connects one end of resistance R14, and the other end of described resistance R14 connects neat
Receive the A/D interface of diode array D1 and described MCU.
Preferably, described zener diode array D1 is used for voltage clamp, as the I/O port protection device of MCU.
The embodiment of the present invention provides the drive circuit of a kind of photoelectric sensor, and described drive circuit includes for extracting PWM
The RC filter circuit of the flip-flop of pulse signal, for exporting the voltage amplification circuit of the voltage of regulation and control electric current, for controlling
Export the current control circuit of electric current and for adjusting according to the electric current that described output electric current is converted to described pwm pulse signal
Loop；Described RC filter circuit is connected with described voltage amplification circuit, described voltage amplification circuit and described current control circuit
Connecting, described current control circuit is connected with described current regulation loops.The present invention has only to regulate the dutycycle of pwm pulse and comes
Controlling to drive size of current, and the dutycycle precision controlled is up to 0.05%, adjustable extent is relatively wider, it addition, whole electricity
There is not delays time to control in road, it is possible to realizes driving control simply, easily to realize and regulation real-time is good, and sensor is resistance to
Dirty property is also preferably and can extend service life of sensor.
Accompanying drawing explanation
Fig. 1 is the structural representation of the drive circuit of a kind of photoelectric sensor that the embodiment of the present invention provides；
Fig. 2 is the structural representation of a kind of RC filter circuit that the embodiment of the present invention provides；
Fig. 3 is the structural representation of a kind of voltage amplification circuit that the embodiment of the present invention provides；
Fig. 4 is the structural representation of a kind of current control circuit that the embodiment of the present invention provides；
Fig. 5 is the structural representation of a kind of current regulation loops that the embodiment of the present invention provides.
Detailed description of the invention
With embodiment, the embodiment of the present invention is described in further detail below in conjunction with the accompanying drawings.It is understood that this
Specific embodiment described by place is used only for explaining the embodiment of the present invention, rather than the restriction to the embodiment of the present invention.Additionally also
It should be noted that for the ease of describing, accompanying drawing illustrate only the part relevant to the embodiment of the present invention rather than entire infrastructure.
It it is the structural representation of the drive circuit of a kind of photoelectric sensor that the embodiment of the present invention provides with reference to Fig. 1, Fig. 1.
As it is shown in figure 1, described drive circuit includes:
For extracting the RC filter circuit 101 of the flip-flop of pwm pulse signal, for exporting the voltage of regulation and control electric current
Voltage amplification circuit 102, for control export electric current current control circuit 103 and for according to by described output electric current change
Current regulation loops 104 for described pwm pulse signal；
Described RC filter circuit 101 is connected with described voltage amplification circuit 102, and described voltage amplification circuit 102 is with described
Current control circuit 103 connects, and described current control circuit 103 is connected with described current regulation loops 104.
Preferably, as in figure 2 it is shown, described RC filter circuit 101 includes one-level RC filter circuit and two grades of RC filter circuits,
Described one-level RC filter circuit includes that resistance R1 and electric capacity C1, described two grades of RC filter circuits include resistance R2 and electric capacity C2；
One end of described resistance R1 connects schmitt inverter, and the other end of described resistance R1 connects the one of described electric capacity C1
End, the other end ground connection of described electric capacity C1；
One end of described electric capacity C1 connects the normal phase input end of the first operational amplifier, bearing of described first operational amplifier
Phase input connects the outfan of described comparator；
One end of described resistance R2 connects the outfan of described first operational amplifier, and the other end of described resistance R2 connects
One end of described electric capacity C2, the other end ground connection of described electric capacity C2.
Wherein, the model of described schmitt inverter is 74LV14, and power supply is 3.3V.
The model of described first operational amplifier is LMV934, and power supply is 3.3V.
Preferably, DC voltage amplitude V=Vp*D of one end output of described electric capacity C2；Wherein, described Vp is pulse width
Degree, described D is pwm pulse dutycycle.The parameter of resistance and electric capacity is come according to the bandwidth of actual low pass filter and the frequency of PWM
Determine.
Preferably, described voltage amplification circuit 102 includes discharge circuit, and the input of described discharge circuit connects unidirectional current
Pressure signal and biasing input signal, described discharge circuit, after described d. c. voltage signal is carried out negative feedback amplification, exports
The voltage of regulation and control electric current.
Preferably, as it is shown on figure 3, described discharge circuit includes the second operational amplifier, described second operational amplifier
Negative-phase input connects one end of resistance R5, and the other end of described resistance R5 connects described d. c. voltage signal；Described second fortune
The normal phase input end calculating amplifier connects one end of resistance R3, and the other end of described resistance R3 connects working power；
The normal phase input end of described second operational amplifier connects one end of resistance R4, another termination of described resistance R4
Ground；
The negative-phase input of described second operational amplifier connects one end and one end of electric capacity C3, the described resistance of resistance R6
The other end of R6 connects the outfan of described second operational amplifier, and electric capacity C3 is connected in parallel with described resistance R6.
Concrete, resistance level is thousand of to tens kilohms, specifically to determine according to required loop gain multiple.
Preferably, as shown in Figure 4, described current control circuit 103 includes the 3rd operational amplifier and pliotron, institute
Stating the 3rd operational amplifier for comparing, described pliotron is used for providing electric current to drive；
When the magnitude of voltage of described current control circuit is higher than pre-determined threshold voltage threshold, described 3rd operational amplifier is defeated
Going out low-voltage, described pliotron ends；
When the magnitude of voltage of described current control circuit is less than described pre-determined threshold voltage threshold, described 3rd operation amplifier
Device output HIGH voltage, the conducting of described pliotron, output driving current, and the size of described driving current value and described electric current
The magnitude of voltage of control circuit is inversely.
Preferably, the negative-phase input of described 3rd operational amplifier connects the outfan of the second operational amplifier, described
The normal phase input end of the 3rd operational amplifier connects one end of resistance R7, one end of resistance R8 and one end of electric capacity C4, described electricity
The other end ground connection of resistance R7, the other end of described resistance R8 and the other end of described resistance C4 connect one end of resistance R9, described
The other end of resistance R9 connects working power, and electric capacity C4 is connected in parallel with described resistance R8；
The outfan of described 3rd operational amplifier connects one end of resistance R11, and the other end of described resistance R11 connects institute
State the base stage of pliotron；The colelctor electrode of described pliotron connects one end of described resistance R9；Described pliotron
Emitter stage connect resistance R10 one end；
The other end of described resistance R10 connects sensor luminous tube, and multiple described sensor luminous tubes are connected in series, described
The luminous tube number of sensor luminous tube series connection is not more than 8.
Wherein, the current-limiting resistance R9 in Fig. 4 is used for limiting the driving electric current of maximum output, it is to avoid sensor is burned, institute
The maximum drive current limited drives electric current less than the maximum impulse of sensor；Multipotency drives N number of LED, N root
Determine according to system design, generally, N≤8.
Preferably, described current regulation loops 104 is for connecing the A/D being input to MCU after small sampled voltage amplification
Carrying out analog digital conversion on Kou, the electric current flow through is controlled by described MCU, and feeds back in the pulsewidth of described pwm pulse signal.
Preferably, as it is shown in figure 5, described current regulation loops includes four-operational amplifier, described 4th operation amplifier
The normal phase input end of device connects one end of resistance Rs and drives electric current, the other end ground connection of described resistance Rs；
The negative-phase input of described four-operational amplifier connects one end of resistance R12, one end of resistance R13, described electricity
The other end ground connection of resistance R12, the other end of described resistance R13 connects the outfan of described four-operational amplifier；
The outfan of described four-operational amplifier connects one end of resistance R14, and the other end of described resistance R14 connects neat
Receive the A/D interface of diode array D1 and described MCU.
Preferably, described zener diode array D1 is MMBZ5227BS, for voltage clamp, as the I/O port of MCU
Protection device.
The embodiment of the present invention provides the drive circuit of a kind of photoelectric sensor, and described drive circuit includes for extracting PWM
The RC filter circuit of the flip-flop of pulse signal, for exporting the voltage amplification circuit of the voltage of regulation and control electric current, for controlling
Export the current control circuit of electric current and for adjusting according to the electric current that described output electric current is converted to described pwm pulse signal
Loop；Described RC filter circuit is connected with described voltage amplification circuit, described voltage amplification circuit and described current control circuit
Connecting, described current control circuit is connected with described current regulation loops.The present invention has only to regulate the dutycycle of pwm pulse and comes
Controlling to drive size of current, and the dutycycle precision controlled is up to 0.05%, adjustable extent is relatively wider, it addition, whole electricity
There is not delays time to control in road, it is possible to realizes driving control simply, easily to realize and regulation real-time is good, and sensor is resistance to
Dirty property is also preferably and can extend service life of sensor.
The know-why of the embodiment of the present invention is described above in association with specific embodiment.These describe and are intended merely to explain this
The principle of inventive embodiments, and the restriction to embodiment of the present invention protection domain can not be construed to by any way.Based on herein
Explanation, those skilled in the art need not to pay performing creative labour, and can to associate other of the embodiment of the present invention concrete
Embodiment, within these modes fall within the protection domain of the embodiment of the present invention.
Claims (10)
1. the drive circuit of a photoelectric sensor, it is characterised in that described drive circuit includes:
For extracting the RC filter circuit of the flip-flop of pwm pulse signal, for exporting the voltage increasing of the voltage of regulation and control electric current
Width circuit, for control export electric current current control circuit and for being converted to described PWM arteries and veins according to by described output electric current
Rush the current regulation loops of signal；
Described RC filter circuit is connected with described voltage amplification circuit, and described voltage amplification circuit is with described current control circuit even
Connecing, described current control circuit is connected with described current regulation loops.
Drive circuit the most according to claim 1, it is characterised in that described RC filter circuit includes one-level RC filter circuit
With two grades of RC filter circuits, described one-level RC filter circuit includes that resistance R1 and electric capacity C1, described two grades of RC filter circuits include
Resistance R2 and electric capacity C2；
One end of described resistance R1 connects schmitt inverter, and the other end of described resistance R1 connects one end of described electric capacity C1,
The other end ground connection of described electric capacity C1；
One end of described electric capacity C1 connects the normal phase input end of the first operational amplifier, and the negative of described first operational amplifier is defeated
Enter end and connect the outfan of described comparator；
One end of described resistance R2 connects the outfan of described first operational amplifier, and the other end of described resistance R2 connects described
One end of electric capacity C2, the other end ground connection of described electric capacity C2.
Drive circuit the most according to claim 2, it is characterised in that the unidirectional current pressure amplitude of one end output of described electric capacity C2
Value V=Vp*D；Wherein, described Vp is pulse amplitude, and described D is pwm pulse dutycycle.
Drive circuit the most according to claim 1, it is characterised in that described voltage amplification circuit includes discharge circuit, institute
The input stating discharge circuit connects d. c. voltage signal and biasing input signal, and described discharge circuit is for described unidirectional current
After pressure signal carries out negative feedback amplification, the voltage of output regulation and control electric current.
Drive circuit the most according to claim 4, it is characterised in that described discharge circuit includes the second operational amplifier,
The negative-phase input of described second operational amplifier connects one end of resistance R5, and the other end of described resistance R5 connects described direct current
Voltage signal；The normal phase input end of described second operational amplifier connects one end of resistance R3, and the other end of described resistance R3 is even
Connect working power；
The normal phase input end of described second operational amplifier connects one end of resistance R4, the other end ground connection of described resistance R4；
The negative-phase input of described second operational amplifier connects one end of resistance R6, and the other end of described resistance R6 connects described
The outfan of the second operational amplifier, electric capacity C3 is connected in parallel with described resistance R6.
Drive circuit the most according to claim 1, it is characterised in that described current control circuit includes the 3rd operation amplifier
Device and pliotron, described 3rd operational amplifier is used for comparing, and described pliotron is used for providing electric current to drive；
When the magnitude of voltage of described current control circuit is higher than pre-pre-determined threshold voltage threshold, described 3rd operational amplifier output
Low-voltage, described pliotron ends；
When the magnitude of voltage of described current control circuit is less than described pre-determined threshold voltage threshold, described 3rd operational amplifier is defeated
Going out high voltage, described pliotron turns on, output driving current, and the size of described driving current value controls with described electric current
The magnitude of voltage of circuit is inversely.
Drive circuit the most according to claim 6, it is characterised in that the negative-phase input of described 3rd operational amplifier is even
Connect the outfan of described second operational amplifier, the normal phase input end of described 3rd operational amplifier connect resistance R7 one end and
One end of resistance R8, the other end ground connection of described resistance R7, the other end of described resistance R8 connects one end of resistance R9, described electricity
The other end of resistance R9 connects working power, and electric capacity C4 is connected in parallel with described resistance R8；
The outfan of described 3rd operational amplifier connects one end of resistance R11, and the other end of described resistance R11 connects described merit
The base stage of rate audion；The colelctor electrode of described pliotron connects one end of described resistance R9；Sending out of described pliotron
Emitter-base bandgap grading connects one end of resistance R10；
The other end of described resistance R10 connects sensor luminous tube, and multiple described sensor luminous tubes are connected in series, described sensing
Device luminous tube number is not more than 8.
Drive circuit the most according to claim 1, it is characterised in that described current regulation loops is for by small sampling
Being input on the A/D interface of MCU carry out analog digital conversion after voltage amplification, the electric current flow through is controlled, and feeds back by described MCU
In the pulsewidth of described pwm pulse signal.
Drive circuit the most according to claim 8, it is characterised in that described current regulation loops includes the 4th operation amplifier
Device, the normal phase input end of described four-operational amplifier connects one end of resistance Rs and drives electric current, another of described resistance Rs
End ground connection；
The negative-phase input of described four-operational amplifier connects one end of resistance R12, one end of resistance R13, described resistance R12
Other end ground connection, the other end of described resistance R13 connects the outfan of described four-operational amplifier；
The outfan of described four-operational amplifier connects one end of resistance R14, and the other end of described resistance R14 connects Zener two
The A/D interface of pole pipe array D1 and described MCU.
Drive circuit the most according to claim 9, it is characterised in that described zener diode array D1 is used for voltage clamp
Position, as the I/O port protection device of described MCU.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610811839.2A CN106332357B (en) | 2016-09-08 | 2016-09-08 | A kind of drive circuit of photoelectric sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610811839.2A CN106332357B (en) | 2016-09-08 | 2016-09-08 | A kind of drive circuit of photoelectric sensor |
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| Publication Number | Publication Date |
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| CN106332357A true CN106332357A (en) | 2017-01-11 |
| CN106332357B CN106332357B (en) | 2018-03-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610811839.2A Expired - Fee Related CN106332357B (en) | 2016-09-08 | 2016-09-08 | A kind of drive circuit of photoelectric sensor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107994874A (en) * | 2017-11-23 | 2018-05-04 | 西安电子科技大学 | IC power consumption compensation circuit |
| CN110057306A (en) * | 2019-06-03 | 2019-07-26 | 呜啦啦(广州)科技有限公司 | The driving device and its auto zero initial method of all diameter sensors |
| CN112306136A (en) * | 2020-11-16 | 2021-02-02 | 深圳普门科技股份有限公司 | Drive current regulating circuit, driver and application thereof |
| CN110057306B (en) * | 2019-06-03 | 2024-06-07 | 呜啦啦(广州)科技有限公司 | Driving device of circumference sensor and automatic zeroing initialization method thereof |
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| CN204203690U (en) * | 2014-10-31 | 2015-03-11 | 深圳怡化电脑股份有限公司 | Constant-current drive circuit |
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| CN205005316U (en) * | 2015-09-28 | 2016-01-27 | 深圳怡化电脑股份有限公司 | Drive circuit |
| CN205179468U (en) * | 2015-11-24 | 2016-04-20 | 深圳怡化电脑股份有限公司 | Constant -current drive circuit and infrared light sensor with adjustable |
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2016
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| JPH1028378A (en) * | 1996-07-11 | 1998-01-27 | Toshiba Corp | Method for controlling power converter and method for controlling power converting system |
| CN204203690U (en) * | 2014-10-31 | 2015-03-11 | 深圳怡化电脑股份有限公司 | Constant-current drive circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107994874A (en) * | 2017-11-23 | 2018-05-04 | 西安电子科技大学 | IC power consumption compensation circuit |
| CN110057306A (en) * | 2019-06-03 | 2019-07-26 | 呜啦啦(广州)科技有限公司 | The driving device and its auto zero initial method of all diameter sensors |
| CN110057306B (en) * | 2019-06-03 | 2024-06-07 | 呜啦啦(广州)科技有限公司 | Driving device of circumference sensor and automatic zeroing initialization method thereof |
| CN112306136A (en) * | 2020-11-16 | 2021-02-02 | 深圳普门科技股份有限公司 | Drive current regulating circuit, driver and application thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106332357B (en) | 2018-03-02 |
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