CN106132020B - It is a kind of to carry stroboscopic, the LED driver of constant power mode - Google Patents
It is a kind of to carry stroboscopic, the LED driver of constant power mode Download PDFInfo
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- CN106132020B CN106132020B CN201610620349.4A CN201610620349A CN106132020B CN 106132020 B CN106132020 B CN 106132020B CN 201610620349 A CN201610620349 A CN 201610620349A CN 106132020 B CN106132020 B CN 106132020B
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 75
- 230000008878 coupling Effects 0.000 claims description 23
- 238000010168 coupling process Methods 0.000 claims description 23
- 238000005859 coupling reaction Methods 0.000 claims description 23
- 238000004891 communication Methods 0.000 claims description 21
- 230000005611 electricity Effects 0.000 claims description 13
- 238000001514 detection method Methods 0.000 claims description 12
- 230000011664 signaling Effects 0.000 claims description 10
- 239000003381 stabilizer Substances 0.000 claims description 7
- 239000003990 capacitor Substances 0.000 claims description 5
- 230000009466 transformation Effects 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 3
- 230000001012 protector Effects 0.000 claims 1
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- 230000006872 improvement Effects 0.000 description 11
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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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]
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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]
Abstract
The invention discloses a kind of LED driver with stroboscopic, constant power mode, including:Power circuit, is coupled to outside mains supply, is exported after mains supply is changed；Circuit for power conversion, is coupled to power circuit to receive the power supply of power circuit output, and the power supply is carried out into out-put supply after power conversion；PWM circuit, is coupled to circuit for power conversion, to input pwm signal to circuit for power conversion；Frequent flashing control circuit, is coupled to outside camera controller, is further coupled between circuit for power conversion and external LED lamp, to control the break-make between LED and circuit for power conversion.The present invention's carries stroboscopic, the LED driver of constant power mode, effectively mains supply can just be changed and powered to LED by the setting of power circuit, circuit for power conversion, PWM circuit, and LED just works when can just realizing that camera works by the setting of frequent flashing control circuit, the power consumption of LED is so effectively reduced.
Description
Technical field
It is more particularly to a kind of to carry stroboscopic, the LED of constant power mode the present invention relates to a kind of LED driver
Driver.
Background technology
In modern roadways vehicle management, road camera occupies highly important status, passes through the shooting of road camera
Effect, it is possible to which effective realize carries out unremitting monitoring in 24 hours to road vehicle situation and road conditions, so
Highly important effect is served in terms of needing to arrest suspected vehicles and traffic offence supervision.
And existing camera is required for controlling by controller during shooting, and set beside it one
The shooting that individual light compensating lamp comes to camera carries out a light filling effect, and existing light compensating lamp is due to its brightness requirement, so typically
From the higher high-power LED lamp of brightness, thus after light compensating lamp opening, consume energy larger, but existing light compensating lamp is in work
, will be always on as long as not damaging when work, to realize the effect for carrying out light filling to camera in real time, so due to LED
Lamp is needed to start always, and when camera is not shot, LED is equally opened, when causing the camera not shoot, LED
Lamp opens the problem of wasting electric energy.
The content of the invention
In view of the deficienciess of the prior art, stopping it is an object of the invention to provide one kind when camera is not shot
Only work, that work is opened when camera is shot carries stroboscopic, the LED driver of constant power mode.
To achieve the above object, the invention provides following technical scheme：It is a kind of to carry stroboscopic, the LED of constant power mode
Driver, including:
Power circuit, is coupled to outside mains supply, is exported after mains supply is changed；
Circuit for power conversion, is coupled to power circuit to receive the power supply of power circuit output, and the power supply is carried out into work(
Out-put supply after rate conversion；
PWM circuit, is coupled to circuit for power conversion, to input pwm signal to circuit for power conversion；
Frequent flashing control circuit, is coupled to outside camera controller, be further coupled to circuit for power conversion and external LED lamp it
Between, to control the break-make between LED and circuit for power conversion.
As a further improvement on the present invention, the frequent flashing control circuit includes：
On-off circuit, is coupled between circuit for power conversion and LED, to control between circuit for power conversion and LED
Break-make；
Signaling conversion circuit, is coupled to outside camera controller, is further coupled to on-off circuit, by outside camera control
The strobe signal of the output of device processed is input in on-off circuit, the break-make of controlling switch circuit.
As a further improvement on the present invention, the on-off circuit includes：
Switching tube Q1, switching tube Q1 has first end, the second end and control end, and its first end is coupled to external LED lamp,
Second end is grounded, and second end is coupled to control end after being also coupled to resistance R3, is further coupled to circuit for power conversion, its control end
It is coupled to signaling conversion circuit；
The signaling conversion circuit includes：
Signal pins P3, signal pins P3 have communications pins 1 and communications pins 2, and the communications pins 1 and communication are drawn
Pin 2 is coupled with outside camera controller, and the communications pins 2 are grounded, and the communications pins 2 are coupled with electric capacity C6 and are followed by
Power supply, the electric capacity C6 is parallel with after voltage-stabiliser tube D2 to be coupled with circuit for power conversion；
Light coupling relay U1, light coupling relay U1 has input and output end, and its input is coupled with after resistance R22
Communications pins 1 are coupled to, circuit for power conversion are coupled to after being also coupled to resistance R6 and diode D5, its output end is coupled to out
Close pipe Q1 control end.
As a further improvement on the present invention, the circuit for power conversion includes：
Rectifier D8, rectifier D8 has input and output end, and its input is coupled to power circuit, and output end is defeated
The direct current gone out after rectification；
Power transformer T1, the power transformer is with the first primary side, the second primary side, the first primary side and second
Level side, first primary side has 1 end and there is 5 ends and 6 ends, the first primary side to have 12 ends and 10 for 3 ends, the second primary side
End, second subprime side have 8 ends and 7 ends, and the coupling of 1 end and the rectifier D8 output end of first primary side have been also coupled to
3 ends are coupled to after diode D4 and diode D6, its 3 end is coupled to PWM circuit, the negative electrode of the diode D4 and two poles
Pipe D6 negative electrode coupling, 1 end of first primary side is coupled to two after being also coupled to resistance R5 parallel with one another and electric capacity C5
Between pole pipe D4 negative electrode and diode D6 negative electrode, and 1 end is also coupled to after diode D3 parallel with one another and resistance R4
The output end that rectifier D8 is coupled to after electric capacity C9 is coupled with, 1 end has been also coupled to be coupled to PWM tune after resistance R7 and resistance R8
Circuit processed, 6 ends of second primary side are coupled with the resistance R11 being serially connected and are coupled with coupling after resistance R9 after diode D7
1 end of the first primary side is connected to, the 5 ends ground connection of second primary side has been also coupled to after electric capacity C10 be coupled to second subprime side
7 ends, 12 ends of first primary side are coupled with the resistance R1 being serially connected and external LED lamp are coupled to after electric capacity C1, and
12 end is also coupled to be coupled to 10 ends of the first primary side, first primary side after electric capacity C2 parallel with one another and electric capacity C3
10 ends be coupled to frequent flashing control circuit, 8 ends of the second subprime side and 7 ends of second subprime side are coupled to frequent flashing control
Circuit.
As a further improvement on the present invention, the PWM circuit includes：
PWM chip U2, PWM chip U2 has power pins VCC, grounding pin GND, measure voltage ＆ current
Pin ZCD, loop compensation pin COMP, current detecting pin CS, driving pin GATE and busbar voltage detection pin MULT, it is described
Power pins VCC is coupled to rectifier D8 output end, the grounding pin GND ground connection, the busbar voltage detection pin
MULT is coupled with after resistance R15 parallel with one another and electric capacity C14 and is grounded, and busbar voltage detection pin MULT is further coupled to resistance
R7, the measure voltage ＆ current pin ZCD is coupled with 6 ends that the primary sides of power transformer T1 second are coupled to after resistance R12, institute
State driving pin GATE and be coupled with after resistance R14 and be coupled with switching tube Q2, the switching tube Q2 there is first end, the second end and control
End processed, the first end is coupled to 3 ends of the primary sides of power transformer T1 first, and control end is coupled with resistance R14；
Constant-current circuit, the constant-current circuit is coupled to current detecting pin CS and measure voltage ＆ current pin ZCD, has been also coupled to
1 end of the primary sides of power transformer T1 first is coupled to after electric capacity C11, by 1 end of power transformer T1 the first primary side
Current signal be input in current detecting pin CS and measure voltage ＆ current pin ZCD；
Invariable power circuit, the invariable power circuit is coupled to measure voltage ＆ current pin ZCD, has been also coupled to coupling after electric capacity C12
Loop compensation pin COMP is connected to, 6 ends of power transformer T1 the second primary side are further coupled to, by power transformer T1's
The voltage and current signal at 6 ends of the second primary side is input to loop compensation pin COMP and measure voltage ＆ current pin ZCD.
As a further improvement on the present invention, the constant-current circuit includes resistance R20, resistance R19, resistance R18, resistance
R21, resistance R16 and diode D11, the resistance R19, resistance R21 and resistance R20 one end are coupled to power transformer T1
1 end, the diode in parallel with resistance R20 after the resistance R18 and resistance R21 are in parallel with resistance R19 after being serially connected
D11 anode is coupled between resistance R18 and resistance R21, and negative electrode is coupled to measure voltage ＆ current pin ZCD, the resistance R16
One end be coupled to current detecting pin CS, its other end is coupled to resistance R20, is further coupled to switching tube Q2 the second end.
As a further improvement on the present invention, the invariable power circuit includes resistance R17, electric capacity C15 and diode D10,
Resistance R12 and PWM chip U2 voltage electricity is coupled to after the resistance R17, electric capacity C15 and diode D10 are parallel with one another
Stream detection pin ZCD.
As a further improvement on the present invention, the power pins VCC, which is coupled to after resistance R9, is coupled to rectifier D8's
Output end, is also coupled to be grounded after electric capacity C16 parallel with one another, electric capacity C17 and voltage-stabiliser tube D12.
As a further improvement on the present invention, the grounding pin GND is coupled to electric capacity C12, the PWM chip U2
Also there is feedback pin FB, feedback pin FB, which is coupled with after electric capacity C13, is coupled to grounding pin GND.
As a further improvement on the present invention, the power circuit includes：
Transformer ET1, is coupled to outside civil power, is further coupled to circuit for power conversion with will be defeated after outside line voltage transformation
Enter into circuit for power conversion；
Protection circuit, is coupled between transformer ET1 and outside civil power, with excessive in outside civil power output current/voltage
Or environment temperature it is too high when, protect transformer ET1；
Filter circuit, is coupled between transformer ET1 and circuit for power conversion, and the voltage that transformer ET1 is exported is filtered
Exported after ripple；
Wherein, the protection circuit includes overvoltage crowbar and thermal-shutdown circuit, the overvoltage crowbar coupling
In outside civil power, the thermal-shutdown circuit is coupled with overvoltage crowbar, and the overvoltage crowbar includes piezo-resistance E2
With piezo-resistance E3, described piezo-resistance E2 one end, which is coupled with after fuse F1, is coupled to outside civil power live wire, other end coupling
In being coupled to outside civil power zero line after piezo-resistance E3, the thermal-shutdown circuit includes thermo-sensitive resistor N1 and discharge tube M1, institute
The one end for stating thermo-sensitive resistor N1 is coupled between piezo-resistance E2 and piezo-resistance E3, and the other end is coupled to discharge tube M1 and is followed by
Ground, the filter circuit includes filter capacitor X2, filter inductance L1, filter inductance L2, electric capacity Y1 and electric capacity Y2, the filtered electrical
Hold X2 and be coupled to transformer ET1, one end of the filter inductance L1 and filter inductance L2 are coupled to transformer ET1, the other end
With circuit for power conversion couple, the electric capacity Y1 be connected to after being connected with electric capacity Y2 filter inductance L1 and filter inductance L2 it
Between, the filter inductance L1, which is coupled with to be coupled with after resistance R13 after resistance R10, is coupled to filter inductance L2.
Beneficial effects of the present invention, pass through the setting of power circuit, it is possible to effectively outside mains supply is turned
Exported after changing, pass through the setting of circuit for power conversion and PWM circuit, it is possible to after power circuit is changed in effective realization
The power supply of output is further changed so that the power supply can power to LED, and by the setting of frequent flashing control circuit,
The effect that just can effectively control circuit for power conversion whether to drive LED to power, so just can effectively realize and take the photograph
When picture is idle, LED does not work, and LED works when camera works, and realizes that the shooting to camera is entered
On the one hand the effect of row light filling, so can effectively ensure the light filling effect of camera, on the other hand can just avoid existing
The problem of excessive caused LED power consumption, waste electric energy are opened due to LED for a long time in technology.
Brief description of the drawings
Fig. 1 is the circuit diagram of power circuit；
Fig. 2 is the circuit diagram of circuit for power conversion, PWM circuit and frequent flashing control circuit.
Embodiment
The present invention is described in further detail below in conjunction with the embodiment given by accompanying drawing.
Referring to figs. 1 to shown in 2, a kind of of the present embodiment carries stroboscopic, the LED driver of constant power mode, and its feature exists
In：Including:
Power circuit 1, is coupled to outside mains supply, is exported after mains supply is changed；
Circuit for power conversion 2, is coupled to power circuit 1 to receive the power supply of the output of power circuit 1, and the power supply is carried out
Out-put supply after power conversion；
PWM circuit 3, is coupled to circuit for power conversion 2, to input pwm signal to circuit for power conversion 2；
Frequent flashing control circuit 4, is coupled to outside camera controller, is further coupled to circuit for power conversion 2 and external LED lamp
Between, to control the break-make between LED and circuit for power conversion 2, during LED driver, outside civil power first
Power supply be will flow into power circuit 1, and power circuit 1 is input to after will handling the voltage and current of mains supply
In circuit for power conversion 2, while PWM circuit 3 will send PWM ripples in circuit for power conversion 2, then power conversion electricity
Power source transition after the processing that the PWM ripples that road 2 will be exported according to PWM circuit 3 export power circuit 1 is steady into one
Export, this makes it possible to realize that provides an effect for a stable power supply to LED well, and pass through after voltage source
The setting of frequent flashing control circuit 4, it is possible to effectively realize that the control camera sent according to outside camera controller is opened
The signal of pass, the break-make between control circuit for power conversion 2 and LED thus can effectively realize control in camera
When opening LED work, and when camera does not have opening the idle effect of LED, so just can be effective
The problem of avoiding wasting electric energy caused by LED is always in the prior art.
As a kind of improved embodiment, the frequent flashing control circuit 4 includes：
On-off circuit 41, is coupled between circuit for power conversion 2 and LED, to control circuit for power conversion 2 and LED
Between break-make；
Signaling conversion circuit 42, is coupled to outside camera controller, is further coupled to on-off circuit 41, by outside shooting
The strobe signal of the output of head controller is input in on-off circuit 41, the break-make of controlling switch circuit 41, passes through on-off circuit
41 setting, it is possible to the effective break-make realized between control circuit for power conversion 2 and LED, and electricity is changed by signal
The setting on road 42, it is possible to which effectively realizing the signal of the control camera for exporting outside camera controller, be converted into can be with
The drive signal of driving switch circuit 41, thus by on-off circuit 41 and the cooperating of signaling conversion circuit 42, effectively
Realize the effect that camera controller control LED is opened and closed.
As a kind of improved embodiment, the on-off circuit 41 includes：
Switching tube Q1, switching tube Q1 has first end, the second end and control end, and its first end is coupled to external LED lamp,
Second end is grounded, and second end is coupled to control end after being also coupled to resistance R3, is further coupled to circuit for power conversion 2, and it is controlled
End is coupled to signaling conversion circuit 42；
The signaling conversion circuit 42 includes：
Signal pins P3, signal pins P3 have communications pins 1 and communications pins 2, and the communications pins 1 and communication are drawn
Pin 2 is coupled with outside camera controller, and the communications pins 2 are grounded, and the communications pins 2 are coupled with electric capacity C6 and are followed by
Power supply, the electric capacity C6 is parallel with after voltage-stabiliser tube D2 to be coupled with circuit for power conversion 2；
Light coupling relay U1, light coupling relay U1 has input and output end, and its input is coupled with after resistance R22
Communications pins 1 are coupled to, circuit for power conversion 2 are coupled to after being also coupled to resistance R6 and diode D5, its output end is coupled to
Switching tube Q1 control end, passes through switching tube Q1 setting, it is possible to effective to realize control circuit for power conversion 2 and LED
Between the effect that whether is powered, and pass through signal pins P3 and light coupling relay U1 setting, it is possible to it is effective realize with it is outer
Connection between portion's camera controller, and the effect that the signal that outside camera controller is exported is changed, so
Effectively realize by the drive signal of outside camera controller to control the effect of LED light on and off.
As a kind of improved embodiment, the circuit for power conversion 2 includes：
Rectifier D8, rectifier D8 has input and output end, and its input is coupled to power circuit 1, output end
Export the direct current after rectification；
Power transformer T1, the power transformer is with the first primary side, the second primary side, the first primary side and second
Level side, first primary side has 1 end and there is 5 ends and 6 ends, the first primary side to have 12 ends and 10 for 3 ends, the second primary side
End, second subprime side have 8 ends and 7 ends, and the coupling of 1 end and the rectifier D8 output end of first primary side have been also coupled to
3 ends are coupled to after diode D4 and diode D6, its 3 end is coupled to PWM circuit 3, the negative electrode and two of the diode D4
Pole pipe D6 negative electrode coupling, 1 end of first primary side is coupled to after being also coupled to resistance R5 parallel with one another and electric capacity C5
Between diode D4 negative electrode and diode D6 negative electrode, and 1 end is also coupled to diode D3 and resistance R4 parallel with one another
The output end that rectifier D8 is coupled to after electric capacity C9 is coupled with afterwards, and 1 end is coupled to PWM after being also coupled to resistance R7 and resistance R8
Modulation circuit 3,6 ends of second primary side are coupled with the resistance R11 being serially connected and are coupled with resistance R9 after diode D7
1 end of the first primary side is coupled to afterwards, and the 5 ends ground connection of second primary side has been also coupled to be coupled to after electric capacity C10 second
7 ends of level side, 12 ends of first primary side are coupled with the resistance R1 being serially connected and are coupled to external LED after electric capacity C1
Lamp, and 12 end is also coupled to be coupled to 10 ends of the first primary side, described first after electric capacity C2 parallel with one another and electric capacity C3
10 ends of primary side are coupled to frequent flashing control circuit 4, and 8 ends of the second subprime side and 7 ends of second subprime side are coupled to
Frequent flashing control circuit 4, passes through reorganizer D8 setting, it is possible to effective to carry out one to the alternating current that power circuit 1 is exported
The effect of rectification, and pass through power transformer T1 setting, it is possible to the PWM ripples exported according to PWM circuit 3 export one
Stable voltage, thus effectively realizes power conversion and exports the effect that burning voltage is powered to LED, and passes through resistance
R4, diode D3 and electric capacity C9 setting, it is possible to realize the effect of a filtering, it is further stable to be input to power transformer
Voltage in T1, passes through the setting by resistance R5, electric capacity C5, diode D4 and diode D6, it is possible to play a transient state
The effect that voltage suppresses, it is to avoid transient voltage is excessive to cause the problem of circuit internal components are damaged.
As a kind of improved embodiment, the PWM circuit 3 includes：
PWM chip U2, PWM chip U2 has power pins VCC, grounding pin GND, measure voltage ＆ current
Pin ZCD, loop compensation pin COMP, current detecting pin CS, driving pin GATE and busbar voltage detection pin MULT, it is described
Power pins VCC is coupled to rectifier D8 output end, the grounding pin GND ground connection, the busbar voltage detection pin
MULT is coupled with after resistance R15 parallel with one another and electric capacity C14 and is grounded, and busbar voltage detection pin MULT is further coupled to resistance
R7, the measure voltage ＆ current pin ZCD is coupled with 6 ends that the primary sides of power transformer T1 second are coupled to after resistance R12, institute
State driving pin GATE and be coupled with after resistance R14 and be coupled with switching tube Q2, the switching tube Q2 there is first end, the second end and control
End processed, the first end is coupled to 3 ends of the primary sides of power transformer T1 first, and control end is coupled with resistance R14；
Constant-current circuit 31, the constant-current circuit is coupled to current detecting pin CS and measure voltage ＆ current pin ZCD, is also coupled to
There is 1 end that the primary sides of power transformer T1 first are coupled to after electric capacity C11, by the 1 of power transformer T1 the first primary side
The current signal at end is input in current detecting pin CS and measure voltage ＆ current pin ZCD；
Invariable power circuit 32, the invariable power circuit 32 is coupled to measure voltage ＆ current pin ZCD, has been also coupled to electric capacity C12
After be coupled to loop compensation pin COMP, 6 ends of power transformer T1 the second primary side are further coupled to, by power transformer
The voltage and current signal at 6 ends of T1 the second primary side is input to loop compensation pin COMP and measure voltage ＆ current pin ZCD,
Pass through PWM chip U2 setting, it is possible to effectively export a PWM ripple, and pass through constant-current circuit 31 and invariable power electricity
The setting on road 32, it is possible to by power transformer T1 electric current and Voltage Feedback to PWM chip U2, such PWM
Chip U2 just can effectively control power transformer T1 to export a constant current, the power supply of invariable power to LED, so much the better
Drive LED work.
As a kind of improved embodiment, the constant-current circuit 31 include resistance R20, resistance R19, resistance R18,
Resistance R21, resistance R16 and diode D11, the resistance R19, resistance R21 and resistance R20 one end are coupled to power transformation
Device T1 1 end, two pole in parallel with resistance R20 after the resistance R18 is in parallel with resistance R19 after being serially connected with resistance R21
Pipe D11 anode is coupled between resistance R18 and resistance R21, and negative electrode is coupled to measure voltage ＆ current pin ZCD, the resistance
R16 one end is coupled to current detecting pin CS, and its other end is coupled to resistance R20, is further coupled to switching tube Q2 the second end,
One shunting just can effectively be played a part of by the connection in series-parallel of multiple resistance, thus can be by power transformer T1
Current distributing be input into low current in the current detecting pin CS of PWM chip and measure voltage ＆ current pin ZCD,
So effectively realize the detection to power transformer T1 electric currents.
As a kind of improved embodiment, the invariable power circuit 32 includes resistance R17, electric capacity C15 and two poles
It is coupled to resistance R12's and PWM chip U2 after pipe D10, the resistance R17, electric capacity C15 and diode D10 are parallel with one another
Measure voltage ＆ current pin ZCD, passes through resistance R17, electric capacity C15 and diode D10 setting, it is possible to effectively to power transformation
Device T1 Current Voltage be input to after changing in PWM chip U2 measure voltage ＆ current pin ZCD, thus may be used
To realize the detection to power transformer T1 power.
As a kind of improved embodiment, the power pins VCC is coupled to rectifier after being coupled to resistance R9
D8 output end, is also coupled to be grounded after electric capacity C16 parallel with one another, electric capacity C17 and voltage-stabiliser tube D12, passes through electric capacity C16, electricity
Hold C17 and voltage-stabiliser tube D12 setting, it is possible to effectively play a part of a voltage stabilizing, so just can be good at adjusting to PWM
Coremaking piece U2 inputs the power supply of voltage stabilizing so that PWM chip can preferably work.
As a kind of improved embodiment, the grounding pin GND is coupled to electric capacity C12, the PWM core
Piece U2 also has feedback pin FB, and feedback pin FB, which is coupled with after electric capacity C13, is coupled to grounding pin GND, passes through electric capacity C12
With electric capacity C13 setting, it is possible to input a stable signal to feedback pin FB so that PWM chip U2 outputs one
The PWM ripples of individual stabilization.
As a kind of improved embodiment, the power circuit 1 includes：
Transformer ET1, is coupled to outside civil power, is further coupled to circuit for power conversion 2 with by after outside line voltage transformation
It is input in circuit for power conversion 2；
Protection circuit 11, is coupled between transformer ET1 and outside civil power, with outside civil power output current/voltage mistake
When big or environment temperature is too high, transformer ET1 is protected；
Filter circuit 12, is coupled between transformer ET1 and circuit for power conversion 2, the voltage that transformer ET1 is exported
Exported after filtering；
Wherein, the protection circuit 11 includes overvoltage crowbar 111 and thermal-shutdown circuit 112, the overvoltage protection
Circuit 111 is coupled to outside civil power, and the thermal-shutdown circuit 112 is coupled with overvoltage crowbar 111, the overvoltage protection electricity
Road 111 includes piezo-resistance E2 and piezo-resistance E3, and described piezo-resistance E2 one end is coupled to outside after being coupled with fuse F1
Civil power live wire, the other end, which is coupled to after piezo-resistance E3, is coupled to outside civil power zero line, and the thermal-shutdown circuit 112 includes temperature
Quick resistance N1 and discharge tube M1, one end of the thermo-sensitive resistor N1 is coupled between piezo-resistance E2 and piezo-resistance E3, another
End is coupled to after discharge tube M1 and is grounded, and the filter circuit 12 includes filter capacitor X2, filter inductance L1, filter inductance L2, electricity
Hold Y1 and electric capacity Y2, the filter capacitor X2 are coupled to transformer ET1, one end of the filter inductance L1 and filter inductance L2 are equal
Transformer ET1 is coupled to, the other end is coupled with circuit for power conversion 2, and the electric capacity Y1 is connected to filter after being connected with electric capacity Y2
Between ripple inductance L1 and filter inductance L2, the filter inductance L1, which is coupled with to be coupled with after resistance R13 after resistance R10, is coupled to filter
Ripple inductance L2, passes through the setting of two protection circuits, it is possible to realize the effect of double protection, and this makes it possible to preferably avoid
The problem of external commercial power power supply causes to damage to internal drive device.
In summary, it is of the invention to carry stroboscopic, the LED driver of constant power mode, pass through power circuit 1, power and turn
Change the setting of circuit 2 and PWM circuit 3, it is possible to effectively play effect of the output constant current constant-power power source to LED
Really, the setting of frequent flashing control circuit 4 is passed through, it is possible to the effective effect for realizing frequent flashing control, it is to avoid in the prior art
Caused by LED is always on the problem of waste of energy.
Described above is only the preferred embodiment of the present invention, and protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical schemes belonged under thinking of the present invention belong to protection scope of the present invention.It should be pointed out that for the art
Those of ordinary skill for, some improvements and modifications without departing from the principles of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of carry stroboscopic, the LED driver of constant power mode, it is characterised in that：Including:
Power circuit（1）, outside mains supply is coupled to, is exported after mains supply is changed；
Circuit for power conversion（2）, it is coupled to power circuit（1）To receive power circuit（1）The power supply of output, and the power supply is entered
Out-put supply after the conversion of row power；
PWM circuit（3）, it is coupled to circuit for power conversion（2）, with to circuit for power conversion（2）Input pwm signal；
Frequent flashing control circuit（4）, outside camera controller is coupled to, circuit for power conversion is further coupled to（2）With external LED lamp
Between, to control LED and circuit for power conversion（2）Between break-make.
2. according to claim 1 carry stroboscopic, the LED driver of constant power mode, it is characterised in that：The stroboscopic control
Circuit processed（4）Including：
On-off circuit（41）, it is coupled to circuit for power conversion（2）Between LED, to control circuit for power conversion（2）With LED
Break-make between lamp；
Signaling conversion circuit（42）, outside camera controller is coupled to, on-off circuit is further coupled to（41）, by outside shooting
The strobe signal of the output of head controller is input to on-off circuit（41）It is interior, controlling switch circuit（41）Break-make.
3. according to claim 2 carry stroboscopic, the LED driver of constant power mode, it is characterised in that：The switch electricity
Road（41）Including：
Switching tube Q1, switching tube Q1 has first end, the second end and control end, and its first end is coupled to external LED lamp, second
End ground connection, second end is coupled to control end after being also coupled to resistance R3, is further coupled to circuit for power conversion（2）, its control end
It is coupled to signaling conversion circuit（42）；
The signaling conversion circuit（42）Including：
Signal pins P3, signal pins P3 have communications pins 1 and communications pins 2, the communications pins 1 and communications pins 2
Coupled with outside camera controller, the communications pins 2 are grounded, and the communications pins 2 are coupled with electric capacity C6 and are followed by electricity
Source, the electric capacity C6 is parallel with after voltage-stabiliser tube D2 and circuit for power conversion（2）Coupling；
Light coupling relay U1, light coupling relay U1 has input and output end, and its input is coupled with after resistance R22 and coupled
In communications pins 1, circuit for power conversion is coupled to after being also coupled to resistance R6 and diode D5（2）, its output end is coupled to out
Close pipe Q1 control end.
4. carry stroboscopic, the LED driver of constant power mode according to claim 1 or 2 or 3, it is characterised in that：It is described
Circuit for power conversion（2）Including：
Rectifier D8, rectifier D8 has input and output end, and its input is coupled to power circuit（1）, output end is defeated
The direct current gone out after rectification；
Power transformer T1, the power transformer has the first primary side, the second primary side, the first primary side and second subprime
Side, first primary side has 1 end and there is 5 ends and 6 ends, the first primary side to have 12 ends and 10 for 3 ends, the second primary side
End, second subprime side have 8 ends and 7 ends, and the coupling of 1 end and the rectifier D8 output end of first primary side have been also coupled to
3 ends are coupled to after diode D4 and diode D6, its 3 end is coupled to PWM circuit（3）, the negative electrode of the diode D4 with
Diode D6 negative electrode coupling, 1 end of first primary side is also coupled to couple after resistance R5 parallel with one another and electric capacity C5
Between diode D4 negative electrode and diode D6 negative electrode, and 1 end is also coupled to diode D3 and resistance parallel with one another
The output end that rectifier D8 is coupled to after electric capacity C9 is coupled with after R4,1 end is coupled to after being also coupled to resistance R7 and resistance R8
PWM circuit（3）, 6 ends of second primary side are coupled with the resistance R11 being serially connected and are coupled with electricity after diode D7
It is coupled to 1 end of the first primary side after resistance R9, the 5 ends ground connection of second primary side has been also coupled to be coupled to the after electric capacity C10
7 ends of secondary stage side, 12 ends of first primary side are coupled with the resistance R1 being serially connected and are coupled to outside after electric capacity C1
LED, and 12 end is also coupled to be coupled to 10 ends of the first primary side, described after electric capacity C2 parallel with one another and electric capacity C3
10 ends of one primary side are coupled to frequent flashing control circuit（4）, the equal coupling in 7 ends at 8 ends and second subprime side of the second subprime side
It is connected to frequent flashing control circuit（4）.
5. according to claim 4 carry stroboscopic, the LED driver of constant power mode, it is characterised in that：The PWM is adjusted
Circuit processed（3）Including：
PWM chip U2, PWM chip U2 has power pins VCC, grounding pin GND, measure voltage ＆ current pin
ZCD, loop compensation pin COMP, current detecting pin CS, driving pin GATE and busbar voltage detection pin MULT, the power supply
Pin VCC is coupled to rectifier D8 output end, the grounding pin GND ground connection, the busbar voltage detection pin MULT couplings
It is connected to after resistance R15 parallel with one another and electric capacity C14 and is grounded, busbar voltage detection pin MULT is further coupled to resistance R7, institute
State measure voltage ＆ current pin ZCD and be coupled with 6 ends that the primary sides of power transformer T1 second are coupled to after resistance R12, the drive
Dynamic pin GATE, which is coupled with after resistance R14, to be coupled with switching tube Q2, the switching tube Q2 and has first end, the second end and control
End, the first end is coupled to 3 ends of the primary sides of power transformer T1 first, and control end is coupled with resistance R14；
Constant-current circuit（31）, the constant-current circuit is coupled to current detecting pin CS and measure voltage ＆ current pin ZCD, has been also coupled to
1 end of the primary sides of power transformer T1 first is coupled to after electric capacity C11, by 1 end of power transformer T1 the first primary side
Current signal be input in current detecting pin CS and measure voltage ＆ current pin ZCD；
Invariable power circuit（32）, the invariable power circuit（32）Measure voltage ＆ current pin ZCD is coupled to, electric capacity C12 has been also coupled to
After be coupled to loop compensation pin COMP, 6 ends of power transformer T1 the second primary side are further coupled to, by power transformer
The voltage and current signal at 6 ends of T1 the second primary side is input to loop compensation pin COMP and measure voltage ＆ current pin ZCD.
6. according to claim 5 carry stroboscopic, the LED driver of constant power mode, it is characterised in that：The Constant Electric Current
Road（31）Including resistance R20, resistance R19, resistance R18, resistance R21, resistance R16 and diode D11, the resistance R19, resistance
R21 and resistance R20 one end are coupled to power transformer T1 1 end, the resistance R18 and resistance R21 be serially connected after with
In parallel with resistance R20 after resistance R19 is in parallel, the anode of the diode D11 is coupled between resistance R18 and resistance R21, negative electrode
The one end for being coupled to measure voltage ＆ current pin ZCD, the resistance R16 is coupled to current detecting pin CS, the coupling of its other end
In resistance R20, switching tube Q2 the second end is further coupled to.
7. according to claim 5 carry stroboscopic, the LED driver of constant power mode, it is characterised in that：The invariable power
Circuit（32）It is parallel with one another including resistance R17, electric capacity C15 and diode D10, the resistance R17, electric capacity C15 and diode D10
Resistance R12 and PWM chip U2 measure voltage ＆ current pin ZCD is coupled to afterwards.
8. according to claim 5 carry stroboscopic, the LED driver of constant power mode, it is characterised in that：The power supply draws
Pin VCC is coupled to the output end that rectifier D8 is coupled to after resistance R9, be also coupled to electric capacity C16 parallel with one another, electric capacity C17 and
It is grounded after voltage-stabiliser tube D12.
9. according to claim 5 carry stroboscopic, the LED driver of constant power mode, it is characterised in that：The grounding lead
Pin GND, which is coupled to electric capacity C12, the PWM chip U2, also there is feedback pin FB, feedback pin FB to be coupled with electric capacity
Grounding pin GND is coupled to after C13.
10. carry stroboscopic, the LED driver of constant power mode according to claim 1 or 2 or 3, it is characterised in that：Institute
State power circuit（1）Including：
Transformer ET1, is coupled to outside civil power, is further coupled to circuit for power conversion（2）With will be defeated after outside line voltage transformation
Enter to circuit for power conversion（2）It is interior；
Protection circuit（11）, it is coupled between transformer ET1 and outside civil power, with excessive in outside civil power output current/voltage
Or environment temperature it is too high when, protect transformer ET1；
Filter circuit（12）, it is coupled to transformer ET1 and circuit for power conversion（2）Between, the voltage that transformer ET1 is exported
Exported after filtering；
Wherein, the protection circuit（11）Including overvoltage crowbar（111）And thermal-shutdown circuit（112）, the overvoltage guarantor
Protection circuit（111）It is coupled to outside civil power, the thermal-shutdown circuit（112）With overvoltage crowbar（111）Coupling, the mistake
Voltage protection circuit（111）Including piezo-resistance E2 and piezo-resistance E3, described piezo-resistance E2 one end is coupled with after fuse F1
Outside civil power live wire is coupled to, the other end, which is coupled to after piezo-resistance E3, is coupled to outside civil power zero line, the overheat protector electricity
Road（112）Including thermo-sensitive resistor N1 and discharge tube M1, one end of the thermo-sensitive resistor N1 is coupled to piezo-resistance E2 and pressure-sensitive electricity
Hinder between E3, the other end is coupled to after discharge tube M1 and is grounded, the filter circuit（12）Including filter capacitor X2, filter inductance
L1, filter inductance L2, electric capacity Y1 and electric capacity Y2, the filter capacitor X2 are coupled to transformer ET1, the filter inductance L1 and filter
Ripple inductance L2 one end is coupled to transformer ET1, and the other end is and circuit for power conversion（2）Coupling, the electric capacity Y1 and electricity
It is connected to after holding Y2 series connection between filter inductance L1 and filter inductance L2, the filter inductance L1 is coupled with after resistance R10 and coupled
Have and filter inductance L2 is coupled to after resistance R13.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610620349.4A CN106132020B (en) | 2016-07-29 | 2016-07-29 | It is a kind of to carry stroboscopic, the LED driver of constant power mode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610620349.4A CN106132020B (en) | 2016-07-29 | 2016-07-29 | It is a kind of to carry stroboscopic, the LED driver of constant power mode |
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| CN106132020A CN106132020A (en) | 2016-11-16 |
| CN106132020B true CN106132020B (en) | 2017-09-08 |
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| CN200973190Y (en) * | 2006-10-17 | 2007-11-07 | 河南霍普曼科技有限公司 | Controller of LED electric saving lamp |
| CN201788585U (en) * | 2010-05-12 | 2011-04-06 | 上海宝康电子控制工程有限公司 | Portable movable high-definition radar speed-measurement electronic police |
| CN202535603U (en) * | 2012-04-09 | 2012-11-14 | 安徽双科测控技术有限责任公司 | Intelligent traffic LED strobe and flash lamp |
| CN103442486B (en) * | 2013-08-26 | 2015-06-10 | 南京工程学院 | High-luminance LED strobe lamp |
| CN105323888A (en) * | 2015-10-13 | 2016-02-10 | 陈英涛 | Multifunctional camera light employing high-power integrated LEDs |
| CN205830118U (en) * | 2016-07-29 | 2016-12-21 | 温州立地电子有限公司 | A kind of with stroboscopic, the LED driver of constant power mode |
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Denomination of invention: A LED Driver with strobe and constant power mode Effective date of registration: 20200911 Granted publication date: 20170908 Pledgee: Wenzhou Financing Guarantee Co.,Ltd. Pledgor: ZHEJIANG LIDIG INFORMATION TECHNOLOGY Co.,Ltd. Registration number: Y2020990001098 |
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