CN205830118U - A kind of with stroboscopic, the LED driver of constant power mode - Google Patents
A kind of with stroboscopic, the LED driver of constant power mode Download PDFInfo
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- CN205830118U CN205830118U CN201620823645.XU CN201620823645U CN205830118U CN 205830118 U CN205830118 U CN 205830118U CN 201620823645 U CN201620823645 U CN 201620823645U CN 205830118 U CN205830118 U CN 205830118U
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Abstract
The utility model discloses a kind of with stroboscopic, the LED driver of constant power mode, including: power circuit, it is coupled to outside mains supply, to export after being changed by mains supply；Circuit for power conversion, is coupled to the power circuit power supply with reception power circuit output, and this power supply carries out 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 photographic head 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.Of the present utility model with stroboscopic, the LED driver of constant power mode, just can effectively carry out changing powering to LED by mains supply by power circuit, circuit for power conversion, the setting of PWM circuit, and LED just works the when of just can realizing photographic head work by the setting of frequent flashing control circuit, so it is effectively reduced the power consumption of LED.
Description
Technical field
This utility model relates to a kind of LED driver, a kind of with stroboscopic, constant power mode
LED driver.
Background technology
In modern roadways vehicle management, road photographic head occupies highly important status, by the shooting of road photographic head
Effect, it is possible to effective realization carries out unremitting monitoring in 24 hours to road vehicle situation and road conditions, so
Highly important effect is served in terms of needs arrest suspected vehicles and traffic offence supervision.
And existing photographic head is required for being controlled by controller during shooting, and arrange one on its side
Individual light compensating lamp carries out a light filling effect to the shooting of photographic head, and existing light compensating lamp is due to its brightness requirement, so typically
Select the high-power LED lamp that brightness is higher, thus after light compensating lamp is opened, power consumption is relatively big, but existing light compensating lamp is in work
The when of work, will be always on as long as not damaging, to realize in real time photographic head being carried out the effect of light filling, so due to LED
Lamp needs to start always, and photographic head does not shoots when, LED is opened equally, the when of causing photographic head not shoot, and LED
The problem that waste electric energy opened by lamp.
Utility model content
The deficiency existed for prior art, the purpose of this utility model is to provide a kind of when photographic head does not shoots
Time quits work, open photographic head shoots when work with stroboscopic, the LED driver of constant power mode.
For achieving the above object, this utility model provides following technical scheme: a kind of with stroboscopic, constant power mode
LED driver, including:
Power circuit, is coupled to outside mains supply, to export after being changed by mains supply；
Circuit for power conversion, is coupled to the power circuit power supply with reception power circuit output, and this power supply is carried out merit
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 photographic head 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 further improvement of the utility model, described 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 photographic head controller, is further coupled to on-off circuit, with by outside photographic head control
The strobe signal of the output of device processed is input in on-off circuit, controls the break-make of on-off circuit.
As further improvement of the utility model, described on-off circuit includes:
Switching tube Q1, this switching tube Q1 have the first end, the second end and control end, and its first end is coupled to external LED lamp,
Second end ground connection, this second end is coupled to after being also coupled to resistance R3 control end, is further coupled to circuit for power conversion, and it controls end
It is coupled to signaling conversion circuit；
Described signaling conversion circuit includes:
Signal pins P3, this signal pins P3 has communications pins 1 and communications pins 2, and described communications pins 1 draws with communicating
Foot 2 all couples with outside photographic head controller, described communications pins 2 ground connection, and this communications pins 2 is coupled with electric capacity C6 and is followed by
Power supply, described electric capacity C6 couples with circuit for power conversion after being parallel with stabilivolt D2；
Light coupling relay U1, this light coupling relay U1 has input and outfan, after its input is coupled with resistance R22
Being coupled to communications pins 1, be coupled to circuit for power conversion after being also coupled to resistance R6 and diode D5, its outfan is coupled to out
Close the control end of pipe Q1.
As further improvement of the utility model, described circuit for power conversion includes:
Commutator D8, this commutator D8 have input and outfan, and its input is coupled to power circuit, and outfan is defeated
Go out the unidirectional current after rectification；
Power transformer T1, this power transformer has the first primary side, the second primary side, the first primary side and second time
Level side, described first primary side has 1 end and 3 ends, the second primary side have 5 ends and 6 ends, the first primary side have 12 ends and 10
End, second subprime side have 8 ends and 7 ends, and 1 end of described first primary side couples and the outfan of commutator D8, has been also coupled to
Being coupled to 3 ends after diode D4 and diode D6, its 3 end is coupled to PWM circuit, the negative electrode of described diode D4 and two poles
The negative electrode of pipe D6 couples, and 1 end of described first primary side is coupled to two after being also coupled to resistance R5 parallel with one another and electric capacity C5
Between negative electrode and the negative electrode of diode D6 of pole pipe D4, and after this 1 end is also coupled to diode D3 parallel with one another and resistance R4
Being coupled to the outfan of commutator D8 after being coupled with electric capacity C9, this 1 end is coupled to PWM and adjusts after being also coupled to resistance R7 and resistance R8
Circuit processed, 6 ends of described second primary side are coupled with coupling after resistance R9 after being coupled with the resistance R11 and diode D7 being serially connected
It is connected to 1 end of the first primary side, 5 end ground connection of described second primary side, it is coupled to second subprime side after being also coupled to electric capacity C10
7 ends, 12 ends of described first primary side are coupled to external LED lamp after being coupled with the resistance R1 and electric capacity C1 being serially connected, and
This 12 end is coupled to 10 ends of the first primary side, described first primary side after being also coupled to electric capacity C2 parallel with one another and electric capacity C3
10 ends be coupled to frequent flashing control circuit, 8 ends of described second subprime side and 7 ends of second subprime side and be all coupled to frequent flashing control
Circuit.
As further improvement of the utility model, described PWM circuit includes:
PWM chip U2, this PWM chip U2 have power pins VCC, grounding pin GND, measure voltage & current
Pin ZCD, loop compensation pin COMP, current detecting foot CS, driving pin GATE and busbar voltage detection pin MULT, described
Power pins VCC is coupled to the outfan of commutator D8, described grounding pin GND ground connection, described busbar voltage detection pin
MULT is coupled with ground connection after resistance R15 parallel with one another and electric capacity C14, and this busbar voltage detection pin MULT is further coupled to resistance
R7, described measure voltage & current pin ZCD are coupled to 6 ends of power transformer T1 the second primary side, institute after being coupled with resistance R12
State after driving pin GATE is coupled with resistance R14 and be coupled with switching tube Q2, described switching tube Q2 there is the first end, the second end and control
End processed, described first end is coupled to 3 ends of power transformer T1 the first primary side, controls end and couples with resistance R14；
Constant-current circuit, this constant-current circuit is coupled to current detecting pin CS and measure voltage & current pin ZCD, has been also coupled to
1 end of power transformer T1 the first primary side it is coupled to, with 1 end by first primary side of power transformer T1 after electric capacity C11
Current signal be input in current detecting pin CS and measure voltage & current pin ZCD；
Invariable power circuit, this invariable power circuit is coupled to measure voltage & current pin ZCD, has been also coupled to coupling after electric capacity C12
It is connected to loop compensation pin COMP, is further coupled to 6 ends of second primary side of power transformer T1, with by power transformer T1's
The voltage and current signal of 6 ends of the second primary side is input to loop compensation pin COMP and measure voltage & current pin ZCD.
As further improvement of the utility model, described constant-current circuit includes resistance R20, resistance R19, resistance R18, electricity
Resistance R21, resistance R16 and diode D11, one end of described resistance R19, resistance R21 and resistance R20 is all coupled to power transformer
1 end of T1, in parallel with resistance R20 after described resistance R18 and resistance R21 is in parallel with resistance R19 after being serially connected, described diode
The anode of D11 is coupled between resistance R18 and resistance R21, and negative electrode is coupled to measure voltage & current pin ZCD, described resistance R16
One end be coupled to current detecting pin CS, its other end is coupled to resistance R20, is further coupled to second end of switching tube Q2.
As further improvement of the utility model, described invariable power circuit includes resistance R17, electric capacity C15 and diode
D10, is coupled to resistance R12 and the electricity of PWM chip U2 after described resistance R17, electric capacity C15 and diode D10 are parallel with one another
Current voltage detection pin ZCD.
As further improvement of the utility model, described power pins VCC is coupled to commutator after being coupled to resistance R9
The outfan of D8, is also coupled to ground connection after electric capacity C16, electric capacity C17 and stabilivolt D12 parallel with one another.
As further improvement of the utility model, described grounding pin GND is coupled to electric capacity C12, described PWM core
Sheet U2 also has feedback pin FB, and this feedback pin FB is coupled to grounding pin GND after being coupled with electric capacity C13.
As further improvement of the utility model, described power circuit includes:
Transformator ET1, is coupled to outside civil power, is further coupled to circuit for power conversion with by defeated after the line voltage transformation of outside
Enter in circuit for power conversion；
Protection circuit, is coupled between transformator ET1 and outside civil power, with excessive at outside civil power output current/voltage
Or ambient temperature too high time, protect transformator ET1；
Filter circuit, is coupled between transformator ET1 and circuit for power conversion, with the voltage filter exported by transformator ET1
Export after ripple；
Wherein, described protection circuit includes that overvoltage crowbar and thermal-shutdown circuit, described overvoltage crowbar couple
In outside civil power, described thermal-shutdown circuit couples with overvoltage crowbar, and described overvoltage crowbar includes varistor E2
With varistor E3, described varistor E2 one end is coupled to outside civil power live wire after being coupled with electric fuse F1, the other end couples
Being coupled to outside civil power zero line after varistor E3, described thermal-shutdown circuit includes thermo-sensitive resistor N1 and discharge tube M1, institute
The one end stating thermo-sensitive resistor N1 is coupled between varistor E2 and varistor E3, and the other end is coupled to discharge tube M1 and is followed by
Ground, described filter circuit includes filter capacitor X2, filter inductance L1, filter inductance L2, electric capacity Y1 and electric capacity Y2, described filtered electrical
Holding X2 and be coupled to transformator ET1, one end of described filter inductance L1 and filter inductance L2 is all coupled to transformator ET1, the other end
All couple with circuit for power conversion, described electric capacity Y1 be connected to after connecting with electric capacity Y2 filter inductance L1 and filter inductance L2 it
Between, described filter inductance L1 is coupled to filter inductance L2 after being coupled with resistance R13 after being coupled with resistance R10.
The beneficial effects of the utility model, by the setting of power circuit, it is possible to effectively enter outside mains supply
Export, by circuit for power conversion and the setting of PWM circuit after row conversion, it is possible to power circuit is turned by effective realization
After changing, the power supply of output is changed further so that this power supply can be powered to LED, and setting by frequent flashing control circuit
Put, it is possible to the effect whether effective control circuit for power conversion drives LED to power, so just can effectively realize
Time photographic head is idle, LED does not works, LED work photographic head works when, it is achieved the shooting to photographic head
Carry out the effect of light filling, the most on the one hand can effectively ensure the light filling effect of photographic head, the most just can avoid existing
Have in technology and open the problem that the LED power consumption caused is excessive, waste electric energy due to LED for a long time.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of power circuit；
Fig. 2 is circuit for power conversion, PWM circuit and the circuit diagram of frequent flashing control circuit.
Detailed description of the invention
Below in conjunction with the embodiment given by accompanying drawing, this utility model is described in further detail.
Referring to figs. 1 through shown in 2, the present embodiment a kind of with stroboscopic, the LED driver of constant power mode, its feature exists
In: including:
Power circuit 1, is coupled to outside mains supply, to export after being changed by mains supply；
Circuit for power conversion 2, is coupled to the power circuit 1 power supply with reception power circuit 1 output, and is carried out by this power supply
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 photographic head 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, first outside civil power
Power supply will flow in power circuit 1, and power circuit 1 will be input to after processing the voltage and current of mains supply
In circuit for power conversion 2, PWM circuit 3 will send PWM ripple in circuit for power conversion 2 simultaneously, then power conversion electricity
Road 2 will become one surely according to the power source transition after the process that power circuit 1 is exported by the PWM ripple that PWM circuit 3 is exported
Export after voltage source, this makes it possible to well realize an effect that a stable power supply is provided to LED, and pass through
The setting of frequent flashing control circuit 4, it is possible to the effective control photographic head realized according to outside photographic head controller is sent is opened
The signal closed, controls the break-make between circuit for power conversion 2 and LED, thus can effectively realize controlling at photographic head
LED work when of opening, and photographic head is not opened when the idle effect of LED, so just can be effective
The problem avoiding the always on waste electric energy caused of LED in prior art.
As a kind of detailed description of the invention improved, described 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 photographic head controller, is further coupled to on-off circuit 41, to be imaged outside
The strobe signal of the output of head controller is input in on-off circuit 41, controls the break-make of on-off circuit 41, passes through on-off circuit
The setting of 41, it is possible to the effective break-make realized between control circuit for power conversion 2 and LED, and by signal conversion electricity
The setting on road 42, it is possible to the signal controlling photographic head of outside photographic head controller output is converted into permissible by effective realization
Drive the driving signal of on-off circuit 41, thus by on-off circuit 41 and the cooperating of signaling conversion circuit 42, effectively
Realize photographic head controller and control the effect that LED opens and closes.
As a kind of detailed description of the invention improved, described on-off circuit 41 includes:
Switching tube Q1, this switching tube Q1 have the first end, the second end and control end, and its first end is coupled to external LED lamp,
Second end ground connection, this second end is coupled to after being also coupled to resistance R3 control end, is further coupled to circuit for power conversion 2, and it controls
End is coupled to signaling conversion circuit 42；
Described signaling conversion circuit 42 includes:
Signal pins P3, this signal pins P3 has communications pins 1 and communications pins 2, and described communications pins 1 draws with communicating
Foot 2 all couples with outside photographic head controller, described communications pins 2 ground connection, and this communications pins 2 is coupled with electric capacity C6 and is followed by
Power supply, described electric capacity C6 couples with circuit for power conversion 2 after being parallel with stabilivolt D2；
Light coupling relay U1, this light coupling relay U1 has input and outfan, after its input is coupled with resistance R22
Being coupled to communications pins 1, be coupled to circuit for power conversion 2 after being also coupled to resistance R6 and diode D5, its outfan is coupled to
The control end of switching tube Q1, by the setting of switching tube Q1, it is possible to effective realization controls circuit for power conversion 2 and LED
Between the effect that whether is energized, and by signal pins P3 and the setting of light coupling relay U1, it is possible to effective realize with outer
Connection between portion's photographic head controller, and the signal of outside photographic head controller output is carried out the effect changed, so
Effectively achieve the effect driving signal to control LED light on and off by outside photographic head controller.
As a kind of detailed description of the invention improved, described circuit for power conversion 2 includes:
Commutator D8, this commutator D8 have input and outfan, and its input is coupled to power circuit 1, outfan
Unidirectional current after output rectification；
Power transformer T1, this power transformer has the first primary side, the second primary side, the first primary side and second time
Level side, described first primary side has 1 end and 3 ends, the second primary side have 5 ends and 6 ends, the first primary side have 12 ends and 10
End, second subprime side have 8 ends and 7 ends, and 1 end of described first primary side couples and the outfan of commutator D8, has been also coupled to
Being coupled to 3 ends after diode D4 and diode D6, its 3 end is coupled to PWM circuit 3, the negative electrode and two of described diode D4
The negative electrode of pole pipe D6 couples, and 1 end of described first primary side is coupled to after being also coupled to resistance R5 parallel with one another and electric capacity C5
Between negative electrode and the negative electrode of diode D6 of diode D4, and this 1 end is also coupled to diode D3 parallel with one another and resistance R4
After be coupled with electric capacity C9 after be coupled to the outfan of commutator D8, this 1 end is coupled to PWM after being also coupled to resistance R7 and resistance R8
Modulation circuit 3,6 ends of described second primary side are coupled with resistance R9 after being coupled with the resistance R11 and diode D7 being serially connected
After be coupled to 1 end of the first primary side, 5 end ground connection of described second primary side, be coupled to second time after being also coupled to electric capacity C10
7 ends of level side, 12 ends of described first primary side are coupled to external LED after being coupled with the resistance R1 and electric capacity C1 being serially connected
Lamp, and this 12 end be also coupled to electric capacity C2 parallel with one another and electric capacity C3 after be coupled to 10 ends of the first primary side, described first
10 ends of primary side are coupled to frequent flashing control circuit 4,8 ends of described second subprime side and 7 ends of second subprime side and are all coupled to
Frequent flashing control circuit 4, by the setting of reorganizer D8, it is possible to effectively the alternating current of power circuit 1 output is carried out one
The effect of rectification, and by the setting of power transformer T1, it is possible to export one according to the PWM ripple of PWM circuit 3 output
Stable voltage, the most effectively achieves the effect that power conversion output burning voltage is powered to LED, and passes through resistance
R4, diode D3 and the setting of electric capacity C9, it is possible to realize the effect of a filtering, be the most stably input to power transformer
Voltage in T1, by by resistance R5, electric capacity C5, diode D4 and the setting of diode D6, it is possible to play a transient state
The effect of voltage suppression, it is to avoid the transient voltage excessive problem causing circuit internal components to damage.
As a kind of detailed description of the invention improved, described PWM circuit 3 includes:
PWM chip U2, this PWM chip U2 have power pins VCC, grounding pin GND, measure voltage & current
Pin ZCD, loop compensation pin COMP, current detecting foot CS, driving pin GATE and busbar voltage detection pin MULT, described
Power pins VCC is coupled to the outfan of commutator D8, described grounding pin GND ground connection, described busbar voltage detection pin
MULT is coupled with ground connection after resistance R15 parallel with one another and electric capacity C14, and this busbar voltage detection pin MULT is further coupled to resistance
R7, described measure voltage & current pin ZCD are coupled to 6 ends of power transformer T1 the second primary side, institute after being coupled with resistance R12
State after driving pin GATE is coupled with resistance R14 and be coupled with switching tube Q2, described switching tube Q2 there is the first end, the second end and control
End processed, described first end is coupled to 3 ends of power transformer T1 the first primary side, controls end and couples with resistance R14；
Constant-current circuit 31, this constant-current circuit is coupled to current detecting pin CS and measure voltage & current pin ZCD, is also coupled to
1 end of power transformer T1 the first primary side it is coupled to, with by the 1 of first primary side of power transformer T1 after having electric capacity C11
The current signal of end is input in current detecting pin CS and measure voltage & current pin ZCD；
Invariable power circuit 32, this 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, be further coupled to 6 ends of second primary side of power transformer T1, with by power transformer
The voltage and current signal of 6 ends of second primary side of T1 is input to loop compensation pin COMP and measure voltage & current pin ZCD,
Setting by PWM chip U2, it is possible to one PWM ripple of effective output, and by constant-current circuit 31 and invariable power electricity
The setting on road 32, it is possible to by the electric current of power transformer T1 and Voltage Feedback to PWM chip U2, such PWM
Chip U2 just can effectively control power transformer T1 export constant current, invariable power power supply to LED, so much the better
Drive LED work.
As improve a kind of detailed description of the invention, described constant-current circuit 31 include resistance R20, resistance R19, resistance R18,
Resistance R21, resistance R16 and diode D11, one end of described resistance R19, resistance R21 and resistance R20 is all coupled to power transformation
1 end of device T1, in parallel with resistance R20 after described resistance R18 and resistance R21 is in parallel with resistance R19 after being serially connected, described two poles
The anode of pipe D11 is coupled between resistance R18 and resistance R21, and negative electrode is coupled to measure voltage & current pin ZCD, described resistance
One end of R16 is coupled to current detecting pin CS, and its other end is coupled to resistance R20, is further coupled to second end of switching tube Q2,
The effect of a shunting just can be effectively played by the connection in series-parallel of multiple resistance, thus can be by power transformer T1
Current distributing become small area analysis to be input in the current detecting pin CS and measure voltage & current pin ZCD of PWM chip,
So effectively achieve the detection to power transformer T1 electric current.
As a kind of detailed description of the invention improved, described invariable power circuit 32 includes resistance R17, electric capacity C15 and two poles
Pipe D10, is coupled to resistance R12's and PWM chip U2 after described resistance R17, electric capacity C15 and diode D10 are parallel with one another
Measure voltage & current pin ZCD, by resistance R17, electric capacity C15 and the setting of diode D10, it is possible to effectively to power transformation
The current/voltage of device T1 is input in the measure voltage & current pin ZCD of PWM chip U2 after carrying out conversion, thus may be used
To achieve the detection to power transformer T1 power.
As a kind of detailed description of the invention improved, described power pins VCC is coupled to commutator after being coupled to resistance R9
The outfan of D8, is also coupled to ground connection after electric capacity C16, electric capacity C17 and stabilivolt D12 parallel with one another, by electric capacity C16, electricity
Hold C17 and the setting of stabilivolt D12, it is possible to effectively play the effect of a voltage stabilizing, the most just can be good at adjusting to PWM
The power supply of coremaking sheet U2 input voltage stabilizing so that PWM chip can preferably work.
As a kind of detailed description of the invention improved, described grounding pin GND is coupled to electric capacity C12, described PWM core
Sheet U2 also has feedback pin FB, and this feedback pin FB is coupled to grounding pin GND after being coupled with electric capacity C13, by electric capacity C12
Setting with electric capacity C13, it is possible to input a stable signal to feedback pin FB so that PWM chip U2 output one
Individual stable PWM ripple.
As a kind of detailed description of the invention improved, described power circuit 1 includes:
Transformator ET1, is coupled to outside civil power, is further coupled to circuit for power conversion 2 with by after the line voltage transformation of outside
It is input in circuit for power conversion 2；
Protection circuit 11, is coupled between transformator ET1 and outside civil power, with in outside civil power output current/voltage mistake
Big or time ambient temperature is too high, protect transformator ET1；
Filter circuit 12, is coupled between transformator ET1 and circuit for power conversion 2, with the voltage exported by transformator ET1
Export after filtering；
Wherein, described protection circuit 11 includes overvoltage crowbar 111 and thermal-shutdown circuit 112, described overvoltage protection
Circuit 111 is coupled to outside civil power, and described thermal-shutdown circuit 112 couples with overvoltage crowbar 111, described overvoltage protection electricity
Road 111 includes that varistor E2 and varistor E3, described varistor E2 one end are coupled to outside after being coupled with electric fuse F1
Civil power live wire, the other end is coupled to outside civil power zero line after being coupled to varistor E3, described thermal-shutdown circuit 112 includes temperature
Quick resistance N1 and discharge tube M1, one end of described thermo-sensitive resistor N1 is coupled between varistor E2 and varistor E3, another
End is coupled to ground connection after discharge tube M1, and described filter circuit 12 includes filter capacitor X2, filter inductance L1, filter inductance L2, electricity
Holding Y1 and electric capacity Y2, described filter capacitor X2 and be coupled to transformator ET1, one end of described filter inductance L1 and filter inductance L2 is equal
Being coupled to transformator ET1, the other end all couples with circuit for power conversion 2, and described electric capacity Y1 is connected to filter with electric capacity Y2 after connecting
Between ripple inductance L1 and filter inductance L2, described filter inductance L1 is coupled to filter after being coupled with resistance R13 after being coupled with resistance R10
Ripple inductance L2, by the setting of two protection circuits, it is possible to realize the effect of double protection, this makes it possible to preferably avoid
The problem that internal drive device is caused damage by external commercial power power supply.
In sum, of the present utility model with stroboscopic, the LED driver of constant power mode, by power circuit 1, merit
Rate change-over circuit 2 and the setting of PWM circuit 3, it is possible to effectively play an output constant current constant-power power source to LED
Effect, and by the setting of frequent flashing control circuit 4, it is possible to effectively realize the effect of frequent flashing control, it is to avoid existing skill
The problem of the always on waste of energy caused of LED in art.
The above is only preferred implementation of the present utility model, and protection domain of the present utility model is not limited merely to
Above-described embodiment, all technical schemes belonged under this utility model thinking belong to protection domain of the present utility model.Should refer to
Go out, for those skilled in the art, without departing from the some improvement under this utility model principle premise and
Retouching, these improvements and modifications also should be regarded as protection domain of the present utility model.
Claims (10)
1. one kind with stroboscopic, the LED driver of constant power mode, it is characterised in that: including:
Power circuit (1), is coupled to outside mains supply, to export after being changed by mains supply；
Circuit for power conversion (2), is coupled to power circuit (1) to receive the power supply that power circuit (1) exports, and is entered by this power supply
Out-put supply after the conversion of row power；
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 photographic head 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).
It is the most according to claim 1 with stroboscopic, the LED driver of constant power mode, it is characterised in that: described stroboscopic control
Circuit processed (4) including:
On-off circuit (41), is coupled between circuit for power conversion (2) and LED, to control circuit for power conversion (2) and LED
Break-make between lamp；
Signaling conversion circuit (42), is coupled to outside photographic head controller, is further coupled to on-off circuit (41), to be imaged outside
The strobe signal of the output of head controller is input in on-off circuit (41), controls the break-make of on-off circuit (41).
It is the most according to claim 2 with stroboscopic, the LED driver of constant power mode, it is characterised in that: described switch electricity
Road (41) including:
Switching tube Q1, this switching tube Q1 have the first end, the second end and control end, and its first end is coupled to external LED lamp, and second
End ground connection, this second end is coupled to after being also coupled to resistance R3 control end, is further coupled to circuit for power conversion (2), and it controls end
It is coupled to signaling conversion circuit (42)；
Described signaling conversion circuit (42) including:
Signal pins P3, this signal pins P3 has communications pins 1 and communications pins 2, described communications pins 1 and communications pins 2
All couple with outside photographic head controller, described communications pins 2 ground connection, and this communications pins 2 is coupled with electric capacity C6 and is followed by electricity
Source, described electric capacity C6 couples with circuit for power conversion (2) after being parallel with stabilivolt D2；
Light coupling relay U1, this light coupling relay U1 has input and outfan, and its input couples after being coupled with resistance R22
In communications pins 1, being coupled to circuit for power conversion (2) after being also coupled to resistance R6 and diode D5, its outfan is coupled to out
Close the control end of pipe Q1.
4. according to described in claim 1 or 2 or 3 with stroboscopic, the LED driver of constant power mode, it is characterised in that: described
Circuit for power conversion (2) including:
Commutator D8, this commutator D8 have input and outfan, and its input is coupled to power circuit (1), and outfan is defeated
Go out the unidirectional current after rectification；
Power transformer T1, this power transformer has the first primary side, the second primary side, the first primary side and second subprime
Side, described first primary side has 1 end and 3 ends, the second primary side have 5 ends and 6 ends, the first primary side have 12 ends and 10
End, second subprime side have 8 ends and 7 ends, and 1 end of described first primary side couples and the outfan of commutator D8, has been also coupled to
Being coupled to 3 ends after diode D4 and diode D6, its 3 end is coupled to PWM circuit (3), the negative electrode of described diode D4 with
The negative electrode of diode D6 couples, and 1 end of described first primary side couples after being also coupled to resistance R5 parallel with one another and electric capacity C5
Between the negative electrode and the negative electrode of diode D6 of diode D4, and this 1 end is also coupled to diode D3 parallel with one another and resistance
Being coupled to the outfan of commutator D8 after being coupled with electric capacity C9 after R4, this 1 end is coupled to after being also coupled to resistance R7 and resistance R8
PWM circuit (3), 6 ends of described second primary side are coupled with electricity after being coupled with the resistance R11 and diode D7 being serially connected
It is coupled to 1 end of the first primary side, 5 end ground connection of described second primary side after resistance R9, after being also coupled to electric capacity C10, is coupled to the
7 ends of secondary stage side, 12 ends of described first primary side are coupled to outside after being coupled with the resistance R1 and electric capacity C1 being serially connected
LED, and this 12 end be also coupled to electric capacity C2 parallel with one another and electric capacity C3 after be coupled to 10 ends of the first primary side, described
10 ends of one primary side are coupled to frequent flashing control circuit (4), 8 ends of described second subprime side and the 7 equal couplings of end of second subprime side
It is connected to frequent flashing control circuit (4).
It is the most according to claim 4 with stroboscopic, the LED driver of constant power mode, it is characterised in that: described PWM adjusts
Circuit processed (3) including:
PWM chip U2, this PWM chip U2 have power pins VCC, grounding pin GND, measure voltage & current pin
ZCD, loop compensation pin COMP, current detecting foot CS, driving pin GATE and busbar voltage detection pin MULT, described power supply
Pin VCC is coupled to the outfan of commutator D8, described grounding pin GND ground connection, described busbar voltage detection pin MULT coupling
Being connected to ground connection after resistance R15 parallel with one another and electric capacity C14, this busbar voltage detection pin MULT is further coupled to resistance R7, institute
State 6 ends being coupled to power transformer T1 the second primary side after measure voltage & current pin ZCD is coupled with resistance R12, described in drive
Dynamic pin GATE is coupled with switching tube Q2, described switching tube Q2 after being coupled with resistance R14 and has the first end, the second end and control
End, described first end is coupled to 3 ends of power transformer T1 the first primary side, controls end and couples with resistance R14；
Constant-current circuit (31), this constant-current circuit is coupled to current detecting pin CS and measure voltage & current pin ZCD, has been also coupled to
1 end of power transformer T1 the first primary side it is coupled to, with 1 end by first primary side of power transformer T1 after electric capacity C11
Current signal be input in current detecting pin CS and measure voltage & current pin ZCD；
Invariable power circuit (32), this 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, be further coupled to 6 ends of second primary side of power transformer T1, with by power transformer
The voltage and current signal of 6 ends of second primary side of T1 is input to loop compensation pin COMP and measure voltage & current pin ZCD.
It is the most according to claim 5 with stroboscopic, the LED driver of constant power mode, it is characterised in that: described Constant Electric Current
Road (31) includes resistance R20, resistance R19, resistance R18, resistance R21, resistance R16 and diode D11, described resistance R19, resistance
One end of R21 and resistance R20 is all coupled to 1 end of power transformer T1, described resistance R18 and resistance R21 be serially connected after with
After resistance R19 parallel connection in parallel with resistance R20, the anode of described diode D11 is coupled between resistance R18 and resistance R21, negative electrode
Being coupled to measure voltage & current pin ZCD, one end of described resistance R16 is coupled to current detecting pin CS, and its other end couples
In resistance R20, it is further coupled to second end of switching tube Q2.
It is the most according to claim 5 with stroboscopic, the LED driver of constant power mode, it is characterised in that: described invariable power
Circuit (32) includes resistance R17, electric capacity C15 and diode D10, and described resistance R17, electric capacity C15 and diode D10 are parallel with one another
After be coupled to the measure voltage & current pin ZCD of resistance R12 and PWM chip U2.
It is the most according to claim 5 with stroboscopic, the LED driver of constant power mode, it is characterised in that: described power supply draws
Foot VCC is coupled to the outfan of commutator D8 after being coupled to resistance R9, be also coupled to electric capacity C16, electric capacity C17 parallel with one another and
Ground connection after stabilivolt D12.
It is the most according to claim 5 with stroboscopic, the LED driver of constant power mode, it is characterised in that: described grounding lead
Foot GND is coupled to electric capacity C12, described PWM chip U2 and also has feedback pin FB, and this feedback pin FB is coupled with electric capacity
Grounding pin GND it is coupled to after C13.
10. according to described in claim 1 or 2 or 3 with stroboscopic, the LED driver of constant power mode, it is characterised in that: institute
State power circuit (1) to include:
Transformator ET1, is coupled to outside civil power, is further coupled to circuit for power conversion (2) with by defeated after the line voltage transformation of outside
Enter in circuit for power conversion (2)；
Protection circuit (11), is coupled between transformator ET1 and outside civil power, with excessive at outside civil power output current/voltage
Or ambient temperature too high time, protect transformator ET1；
Filter circuit (12), is coupled between transformator ET1 and circuit for power conversion (2), with the voltage exported by transformator ET1
Export after filtering；
Wherein, described protection circuit (11) includes overvoltage crowbar (111) and thermal-shutdown circuit (112), and described overvoltage is protected
Protection circuit (111) is coupled to outside civil power, and described thermal-shutdown circuit (112) couples with overvoltage crowbar (111), described mistake
Voltage protection circuit (111) includes varistor E2 and varistor E3, after described varistor E2 one end is coupled with electric fuse F1
Being coupled to outside civil power live wire, the other end is coupled to outside civil power zero line, described overheat protector electricity after being coupled to varistor E3
Road (112) includes that thermo-sensitive resistor N1 and discharge tube M1, one end of described thermo-sensitive resistor N1 are coupled to varistor E2 and pressure-sensitive electricity
Between resistance E3, the other end is coupled to ground connection after discharge tube M1, and described filter circuit (12) includes filter capacitor X2, filter inductance
L1, filter inductance L2, electric capacity Y1 and electric capacity Y2, described filter capacitor X2 is coupled to transformator ET1, described filter inductance L1 and filter
One end of ripple inductance L2 is all coupled to transformator ET1, and the other end all couples with circuit for power conversion (2), described electric capacity Y1 and electricity
Being connected between filter inductance L1 and filter inductance L2 after holding Y2 series connection, described filter inductance L1 couples after being coupled with resistance R10
Filter inductance L2 it is coupled to after having resistance R13.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620823645.XU CN205830118U (en) | 2016-07-29 | 2016-07-29 | A kind of with stroboscopic, the LED driver of constant power mode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620823645.XU CN205830118U (en) | 2016-07-29 | 2016-07-29 | A kind of with stroboscopic, the LED driver of constant power mode |
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| Publication Number | Publication Date |
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| CN205830118U true CN205830118U (en) | 2016-12-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620823645.XU Withdrawn - After Issue CN205830118U (en) | 2016-07-29 | 2016-07-29 | A kind of with stroboscopic, the LED driver of constant power mode |
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| CN (1) | CN205830118U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106132020A (en) * | 2016-07-29 | 2016-11-16 | 温州立地电子有限公司 | A kind of with stroboscopic, the LED driver of constant power mode |
| CN108738203A (en) * | 2018-07-13 | 2018-11-02 | 深圳安赋特科技有限公司 | LED power invariable power input control circuit |
-
2016
- 2016-07-29 CN CN201620823645.XU patent/CN205830118U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106132020A (en) * | 2016-07-29 | 2016-11-16 | 温州立地电子有限公司 | A kind of with stroboscopic, the LED driver of constant power mode |
| CN108738203A (en) * | 2018-07-13 | 2018-11-02 | 深圳安赋特科技有限公司 | LED power invariable power input control circuit |
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