CN105813285A - LED constant current driving device - Google Patents
LED constant current driving device Download PDFInfo
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- CN105813285A CN105813285A CN201410850102.2A CN201410850102A CN105813285A CN 105813285 A CN105813285 A CN 105813285A CN 201410850102 A CN201410850102 A CN 201410850102A CN 105813285 A CN105813285 A CN 105813285A
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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
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
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Abstract
The invention relates to an LED constant current driving device comprising a rectification module, a constant current module, and an illuminating module. The illuminating module comprises a plurality of LED units. The output end of the rectification module is connected with the illuminating module, and the constant current module is connected with the illuminating module. The constant current module comprises a plurality of current-limiting units and a sampling unit. Every current-limiting unit comprises a resistor, a voltage-regulator tube, a triode, and a transistor. In every current-limiting unit, the drain electrode of the transistor and one end of the resistor thereof are connected with the output end of the corresponding LED unit, and the grid electrode of the transistor is connected with the other end of the resistor thereof, the negative end of the voltage-regulator tube, and the collector electrode of the triode thereof, and then the source electrode of the transistor and the base electrode of the triode thereof are connected with the sampling unit, and in addition, the emitter of the triode is connected with the positive end of the voltage-regulator tube, and then is grounded. The LED constant current driving device has advantages of small size, low costs, and high power factor.
Description
Technical field
The present invention relates to a kind of LED drive device, particularly relate to a kind of LED constant current driving device.
Background technology
Present country advocates energy-saving and emission-reduction, and the illuminating product at the LED light source of lighting field employing quickly grows with its excellent energy-conservation, low-carbon (LC) and environmental protection effect.When LED is as light source of illumination device, the life-span of illuminator depends not only on LED, additionally depends on the assemblies such as driving power supply.In current application scheme, the bottleneck in LED light device life-span remains driving power supply.In order to reduce driving power source life to LED lamp aging effects, research worker improves existing DC source driving device on the one hand, and designing brand-new alternating current directly drives the circuit of LED on the other hand.
For ordinary people, use LED illumination product can save electric energy, but existing LED illumination product there is problems of driving the life-span short.Because the existing drive scheme that adopts on the market is traditional switch power technology, this technology relative maturity, but the volume of power supply is bigger, it is desirable to have good heat dispersion.When this power technology is incorporated into LED illumination product, it is supplied to the narrow space driving power supply, operating ambient temperature higher (higher than 60 DEG C).So directly resulting in driving service life reduction, the cost of Simultaneous Switching power supply is high, and EMC characteristic poor (needing additional auxiliary element).And existing LED illumination product is once damage, and is substantially free of the value of maintenance, it is necessary to directly change driving power supply, but the restriction due to limited LED illumination product power supply cavity, generally can only change appointment producer, it is intended that the driving power supply of model, and maintenance process is complicated.
Currently also having some exchanges directly to drive LED circuit, its method adopted is traditional resistance-capacitance depressurization or adopts single channel linear constant current technology.Although resistance-capacitance depressurization cost is low, but there is problems with in these technology, and the power factor of LED circuit is relatively low (being generally 0.2～0.5).And needing to adopt high-voltage capacitance, the volume of this electric capacity is big, the life-span, also just all can be breakdown once capacitance damage LED well below LED, directly results in whole light fixture and scraps.In addition, although adopting single channel linear constant current technology to solve the problem on the low side (being typically in 0.8～0.85) of power factor, but in a cycle of electric main work, owing to circuit needs one to start voltage, and this startup voltage is general higher, thus circuit for a long time is had to be in off position (utilization rate is lower than 60%).
For this situation occurred, occur in that again now that the exchange of the function with multy-way switching of modified form directly drives LED circuit.This circuit is by being decomposed into multistage by a string LED, and every section of access has an independent galvanostat, selects different access terminal numbers according to different voltage.This actuation techniques can resolve the problem of original actuation techniques preferably, but this actuation techniques equally exists deficiency.Circuit needs specific input voltage sample circuit, and the constant current part in this kind of circuit have employed the electronic components such as amplifier simultaneously, therefore also needs to provide necessary running voltage and reference voltage to these element manipulation.But these circuit can reduce the reliability of circuit, and special controller is needed to control multi-way switch circuit by the input voltage detected.Breaking down once control switching, necessarily causing that LED is broken down by high-voltage, causing that light fixture is scrapped.Such as, the open CN201310080348.1 of Chinese patent discloses a kind of stagewise LED drive circuit based on AC power supplies, and LED drive circuit includes rectification unit, constant current driving unit and lighting unit.This LED drive circuit needs to provide the running voltage of necessity to the operational amplifier in constant current driving unit, and the reliability of circuit reduces.
Summary of the invention
Deficiency for prior art, the invention provides a kind of LED constant current driving device, it includes rectification module, constant flow module and lighting module, described lighting module includes several LED unit, it is characterized in that, the outfan of described rectification module connects described lighting module, described constant flow module is connected with described lighting module, described constant flow module includes several flow-restriction and a sampling unit, each flow-restriction all includes a resistance, a stabilivolt, an audion and a transistor
In each flow-restriction, the drain electrode of its transistor is commonly connected to the outfan of corresponding LED unit with one end of its resistance, the grid of its transistor connects the colelctor electrode of the other end of its resistance, the negative terminal of its stabilivolt and its audion, the source electrode of its transistor and the base stage of its audion connect described sampling unit jointly, and the emitter stage of its audion be connected with the anode of its stabilivolt after ground connection
In each flow-restriction, the source electrode of its transistor and the base stage of its audion are all connected to the source electrode of the transistor of next flow-restriction and the base stage of audion via corresponding sampling resistor.
According to a preferred implementation, described rectification module includes the first rectifier arm and the second rectifier arm that are made up of four diodes, the first diode and the second Diode series in described four diodes constitute described first rectifier arm, and the 3rd diode and the 4th Diode series in described four diodes constitute described second rectifier arm.
According to a preferred implementation, described diode is commutation diode or Schottky diode.
According to a preferred implementation, the sampling resistor that described sampling unit is serially connected by several is constituted.
According to a preferred implementation, described transistor is N-MOSFET or NPN type triode.
According to a preferred implementation, described flow-restriction also includes an electric capacity, and described Capacitance parallel connection is described stabilivolt extremely.
According to a preferred implementation, described LED unit is made up of many or single low-voltage LED, and described LED adopts the connected mode of series connection or connection in series-parallel combination to be attached.
According to a preferred implementation, described LED unit is adopt the high-voltage LED module of COB encapsulation.
The present invention at least has the advantage that
1, LED constant current driving device is provided without input voltage sample circuit and control circuit, and cost is low, volume is little, and circuit reliability is high.
2, circuit does not use electrochemical capacitor and inductance, so that the long service life of LED lamp, and there is good EMC characteristic.
3, constant current driver circuit for LED can adjust the onunit number of LED with change in voltage, has higher power factor (being not less than 0.95), and can put forward high-tension utilization rate (more than 90%).
4, circuit can regulate the size of input current by changing the resistance of sampling resistor, it is achieved thereby that input power is adjustable.
Accompanying drawing explanation
Fig. 1 is the driving circuit structure figure of the present invention；
Fig. 2 is the driving circuit principle figure of the present invention；
Fig. 3 is the oscillogram of input ac voltage in the present invention；
Fig. 4 is by the voltage oscillogram after rectification module in the present invention；With
Fig. 5 is input voltage and the time dependent oscillogram of input current in the present invention.
Detailed description of the invention
It is described in detail below in conjunction with accompanying drawing.As it is shown in figure 1, the LED constant current driving device of the present invention includes rectification module 10, constant flow module and lighting module 70.Lighting module 70 includes several LED unit.The outfan of rectification module 10 connects lighting module 70, and constant flow module is connected with lighting module 70.Constant flow module includes several flow-restriction and a sampling unit 20.Each flow-restriction all includes a resistance, a stabilivolt, an audion and a transistor.In each flow-restriction, the drain electrode of its transistor is commonly connected to the outfan of corresponding LED unit with one end of its resistance.The grid of transistor connects the colelctor electrode of the other end of resistance, the negative terminal of stabilivolt and audion.The source electrode of transistor and the base stage of audion connect sampling unit 20 jointly, and the emitter stage of audion be connected with the anode of stabilivolt after ground connection.Aforementioned LED unit can be many or single low-voltage LED, it is also possible to is the high-voltage LED module adopting COB encapsulation.
The existing traditional exchange of LED constant current driving device directly drives the advantage of LED circuit, can further improve again the reliability of circuit, and without the need for special control circuit, the cost of such circuit can reduce.Drive circuit is not used electrochemical capacitor required in traditional switch power technology, thus the life-span is high.Also without inductance in drive circuit, thus there is good EMC characteristic.
As it is shown in figure 1, rectification module 10 includes 4 commutation diodes 101,102,103,104 in circuit.Sampling unit 20 includes 4 sampling resistors 201,202,203,204.Flow-restriction 51 includes 1 audion, 205, stabilivolt 301 of 501,1 resistance and 1 transistor 601.Flow-restriction 52 includes 1 audion, 206, stabilivolt 302 of 502,1 resistance and 1 transistor 602.Flow-restriction 53 includes 1 audion, 207, stabilivolt 303 of 503,1 resistance and 1 transistor 603.Flow-restriction 54 includes 1 audion, 208, stabilivolt 304 of 504,1 resistance and 1 transistor 604.Lighting module 70 includes LED unit 701,702,703,704.The LED quantity of each LED unit is that LED adopts and is connected serially more than or equal to one, it would however also be possible to employ the mode gone here and there and combine connects.Diode 101,102,103,104 can be common commutation diode, it is also possible to be pressure enough Schottky diodes or other components and parts that can realize identical function.Transistor 601,602,603,604 can be N-MOSFET, it is also possible to be NPN type triode.
The first input end IN1 of rectification module 10 is connected on the connection node of the first diode 101 anode and the second diode 102 negative terminal.The anode of the second diode 102 and the anode of the 4th diode 104 are connected, and it connects node ground connection.Second input IN2 of rectification module 10 is connected on the anode of the 3rd diode 103 and the connection node of the 4th diode 104 negative terminal.The negative terminal of the 3rd diode 103 connects the negative terminal of the first diode 101, and it connects node and constitutes the output plus terminal of rectification module 10.The input of LED unit 701 is connected with the output plus terminal of rectification module 10.The outfan of LED unit 701 is connected with the input of LED unit 702, and the outfan of LED unit 701 connects the drain electrode of transistor 601 and one end of resistance 205.The outfan of LED unit 702 is connected with the input of LED unit 703, and the outfan of LED unit 702 connects the drain electrode of transistor 602 and one end of resistance 206.The outfan of LED unit 703 is connected with the input of LED unit 704, and the outfan of LED unit 703 connects the drain electrode of transistor 603 and one end of resistance 207.The outfan of LED unit 704 connects the drain electrode of transistor 604 and one end of resistance 208.
The other end of resistance 205 connects the grid of the negative terminal of stabilivolt 301, the colelctor electrode of audion 501 and transistor 601.The other end of resistance 206 connects the grid of the negative terminal of stabilivolt 302, the colelctor electrode of audion 502 and transistor 602.The other end of resistance 207 connects the grid of the negative terminal of stabilivolt 303, the colelctor electrode of audion 503 and transistor 603.The other end of resistance 208 connects the grid of the negative terminal of stabilivolt 304, the colelctor electrode of audion 504 and transistor 604.The anode of stabilivolt 301 ground connection again after being connected with the emitter stage of audion 501.The anode of stabilivolt 302 ground connection again after being connected with the emitter stage of audion 502.The anode of stabilivolt 303 ground connection again after being connected with the emitter stage of audion 503.The anode of stabilivolt 304 ground connection again after being connected with the emitter stage of audion 504.
After the base stage of audion 501 is connected with the source electrode of transistor 601, then it is connected with one end of sampling resistor 201.After the base stage of audion 502 is connected with the source electrode of transistor 602, then it is connected with the other end of sampling resistor 201 and one end of sampling resistor 202.After the base stage of audion 503 is connected with the source electrode of transistor 603, then it is connected with the other end of sampling resistor 202 and one end of sampling resistor 203.After the base stage of audion 504 is connected with the source electrode of transistor 604, then it is connected with the other end of sampling resistor 203 and one end of sampling resistor 204.The other end ground connection of sampling resistor 204.
As in figure 2 it is shown, each flow-restriction may also include an electric capacity, capacitor is in parallel with stabilivolt, so can improve the reliability of circuit.One end of capacitor 401 is connected with the negative terminal of stabilivolt 301, and the other end of electric capacity 401 connects the anode of stabilivolt 301.One end of capacitor 402 is connected with the negative terminal of stabilivolt 302, and the other end of electric capacity 402 connects the anode of stabilivolt 302.One end of capacitor 403 is connected with the negative terminal of stabilivolt 303, and the other end of electric capacity 403 connects the anode of stabilivolt 303.One end of capacitor 404 is connected with the negative terminal of stabilivolt 304, and the other end of electric capacity 404 connects the anode of stabilivolt 304.
It is illustrated in figure 3 the voltage oscillogram of electric main.Electric main output ripple unidirectional current after the bridge rectifier that commutation diode 101,102,103,104 forms.The voltage oscillogram of Rectified alternating current is as shown in Figure 4.
The specific works mode of the LED constant current driving device of the present invention is as follows: the forward conduction voltage of LED unit 701,702,703,704 is Vf1, Vf2, Vf3, Vf4.Pulse direct current is pressed in lifting process and there is magnitude of voltage VF1, VF2, VF3, VF4, and this pulse voltage value meets feature: VF1=Vf1；VF2=Vf1+Vf2；VF3=Vf1+Vf2+Vf3；VF4=Vf1+Vf2+Vf3+Vf4 Vmax.
When initial, after pulsating dc voltage is risen to VF1 by 0V, electric current flows through LED unit 701, resistance 205 and stabilivolt 301.Obtaining a stable voltage V1 on stabilivolt 301 negative terminal, make transistor 601 in the conduction state, electric current flows through transistor 601, sampling resistor 201,202,203 and 204 from LED unit 701 outfan.Such circuit turn-on, LED unit 701 starts luminescence.Current input terminal at sampling resistor 201 obtains the voltage sum that sampled voltage Vref1, a Vref1 are each self-forming of resistance 201,202,203,204.Sampled voltage Vref1 is supplied to audion 501 base voltage, when Vref1 is more than the base stage forward voltage V of audion 501BEDuring=0.6V, audion 501 turns on and is operated in amplification region, and the voltage of the colelctor electrode of audion 501 declines thus reducing the grid voltage of transistor 601, causes that the output electric current of transistor 601 declines, and the sampled voltage Vref1 of sampling resistor 201 declines.As Vref1 < VBETime, audion 501 ends, and the grid voltage of transistor 601 rises, and makes transistor 601 turn on and be operated in amplification region.The electric current then flowing through transistor 601 is constant, it is achieved that current limliting, electric current Iin=I1。
When pulsating dc voltage is risen to by VF1 in the process of VF2, pulsating dc voltage has reached the default shutoff magnitude of voltage of flow-restriction 51, and flow-restriction 51 turns off.Electric current flows through LED unit 701, LED unit 702, resistance 206 and stabilivolt 302.Obtaining a stable voltage V2 on stabilivolt 302 negative terminal, make transistor 602 in the conduction state, electric current flows through transistor 602, sampling resistor 202,203 and 204 from LED unit 702 outfan.Such circuit turn-on, LED unit 702 starts luminescence.Current input terminal at sampling resistor 202 obtains the voltage sum that sampled voltage Vref2, a Vref2 are each self-forming of resistance 202,203,204.Sampled voltage Vref2 is supplied to audion 502 base voltage, when Vref2 is more than the base stage forward voltage V of audion 502BEDuring=0.6V, tee T 502 turns on and is operated in amplification region, making the decline of colelctor electrode of audion 502 thus reducing the grid voltage of transistor 602, causing that the output electric current of transistor 602 declines, and the sampled voltage Vref2 of sampling resistor 202 declines.As Vref2 < VBETime, audion 502 ends.Now the grid voltage of transistor 602 rises, and makes transistor 602 turn on and be operated in amplification region, and the electric current flowing through transistor 602 is constant, it is achieved that current limliting, electric current Iin=I2.Now Vref1 >=Vref2, audion 501 is operated in conducting state, and transistor 601 is operated in cut-off state.
After pulsating dc voltage is risen to VF3 by VF2, pulsating dc voltage has reached the default shutoff magnitude of voltage of flow-restriction 52, and flow-restriction 52 turns off.Electric current flows through LED unit 701, LED unit 702, LED unit 703, resistance 207 and stabilivolt 303.Obtaining a stable voltage V3 on stabilivolt 303 negative terminal, make transistor 603 in the conduction state, electric current flows through transistor 603, sampling resistor 203 and 204 from LED unit 703 outfan.Such circuit turn-on, LED unit 703 starts luminescence.Current input terminal at sampling resistor 203 obtains the voltage sum that sampled voltage Vref3, a Vref3 are each self-forming of resistance 203,204.Sampled voltage Vref3 is supplied to audion 503 base voltage, when Vref3 is more than the base stage forward voltage V of audion 503BEDuring=0.6V, tee T 503 turns on and is operated in amplification region, making the decline of colelctor electrode of audion 503 thus reducing the grid voltage of transistor 603, causing that the output electric current of transistor 603 declines, and the sampled voltage Vref3 of sampling resistor 203 declines.As Vref3 < VBETime, audion 503 ends.Now the grid voltage of transistor 603 rises, and makes transistor 603 turn on and be operated in amplification region, and the electric current flowing through transistor 603 is constant, it is achieved that current limliting, electric current Iin=I3.Now Vref2 >=Vref3, audion 502 is operated in conducting state, and transistor 602 is operated in cut-off state.
After pulsating dc voltage is risen to VF4 by VF3, pulsating dc voltage has reached the default shutoff magnitude of voltage of flow-restriction 53, and flow-restriction 53 turns off.Electric current flows through LED unit 701, LED unit 702, LED unit 703, LED unit 704, resistance 208 and stabilivolt 304.Obtaining a stable voltage V4 on stabilivolt 304 negative terminal, make transistor 604 in the conduction state, electric current flows through transistor 604 and sampling resistor 204 from LED unit 704 outfan.Such circuit turn-on, LED unit 704 starts luminescence.Current input terminal at sampling resistor 204 obtains the voltage that sampled voltage Vref4, a Vref4 are resistance 204.Sampled voltage Vref4 is supplied to audion 504 base voltage, when Vref4 is more than the base stage forward voltage V of audion 504BEDuring=0.6V, tee T 504 turns on and is operated in amplification region, making the decline of colelctor electrode of audion 504 thus reducing the grid voltage of transistor 604, causing that the output electric current of transistor 604 declines, and the sampled voltage Vref4 of sampling resistor 204 declines.As Vref4 < VBETime, audion 504 ends.Now the grid voltage of transistor 604 rises, and makes transistor 604 turn on and be operated in amplification region, and the electric current flowing through transistor 604 is constant, it is achieved that current limliting, electric current Iin=I4.Now Vref3 >=Vref4, audion 503 is operated in conducting state, and transistor 603 is operated in cut-off state.
Said process is reversible process, and pulsed dc voltage begins to decline after rising to Vmax.When voltage drops to VF3 from VF4, now audion 504 is in and is operated in amplification region, and transistor 604 is also operated in amplification region.But after declining due to voltage, LED unit 701,702,703,704 can not be made to light simultaneously, thus just not having electric current to pass through LED unit 704, transistor 604 and sampling resistor 204, the voltage Vref4 of the current input terminal allowing for sampling resistor 204 reduces, and the base voltage of sampled voltage Vref3 and audion 503 that the electric current of sampling resistor 203 flows into end also decreases simultaneously.Vref4 reduces, and audion 504, transistor 604 end in succession.The now base stage forward voltage Vref3 < V of audion 503BE, audion 503 ends, and therefore the grid voltage of transistor 603 becomes big, and transistor 603 turns on.Flow-restriction 53 ON operation, electric current drops to Iin=I3。
After voltage drops to VF2 from VF3, now audion 503 is in and is operated in amplification region, and transistor 603 is also operated in amplification region.But after declining due to voltage, LED unit 701,702,703 can not be made to light simultaneously, thus just not having electric current to pass through LED unit 703, transistor 603 and sampling resistor 203, the voltage Vref3 of the current input terminal allowing for sampling resistor 203 reduces, and simultaneously the sampled voltage Vref2 of current input terminal of sampling resistor 202 and the base voltage of audion 502 also decrease.Vref3 reduces, and audion 503, transistor 603 end in succession.The now base stage forward voltage Vref2 < V of audion 502BE, audion 502 ends, and therefore the grid voltage of transistor 602 becomes big, and flow-restriction 52 ON operation, electric current drops to Iin=I2。
After voltage drops to VF1 from VF2, although now audion 502 is in and is operated in amplification region so that transistor 602 is also operated in amplification region.But after declining due to voltage, LED unit 701,702 can not be made to light simultaneously, thus just not having electric current to pass through LED unit 702, transistor 602 and sampling resistor 202, the voltage Vref2 of the first end allowing for sampling resistor 202 reduces, and simultaneously the sampled voltage Vref1 of current input terminal of sampling resistor 201 and the base voltage of audion 501 also decrease.Vref2 reduces, and audion 502, transistor 602 end in succession.The now base stage forward voltage Vref1 < V of audion 501BE, audion 501 ends, and therefore the grid voltage of transistor 601 becomes big, and flow-restriction 51 ON operation, electric current drops to Iin=I1。
After voltage drops to 0V from VF1, owing to voltage have dropped, it is impossible to enough light LED unit 701, thus just not having electric current to pass through LED unit 701, transistor 601 and sampling resistor 201, the voltage Vref1 of the current input terminal allowing for sampling resistor 201 reduces.Vref1 reduces, and audion 501, transistor 601 end in succession, it does not have electric current passes through.Such LED unit 701,702,703,704 is all extinguished.
The drive circuit of the present invention need not be sampled by input voltage, and the special controller being equipped with, and therefore cost is low, volume is little, and has significantly high reliability.Constant current driver circuit for LED can adjust the onunit number of LED with change in voltage, has higher power factor (being not less than 0.95), and can put forward high-tension utilization rate (more than 90%).Circuit can change by changing the resistance of sampling resistor the size of input current, therefore can adjust input power.
It should be noted that above-mentioned specific embodiment is illustrative of, under the above-mentioned instruction of the present invention, those skilled in the art can carry out various improvement and deformation on the basis of above-described embodiment, and these improve or deformation is within the scope of the present invention.It will be understood by those skilled in the art that specific descriptions above are intended merely to the explanation purpose of the present invention, be not intended to limit the present invention.Protection scope of the present invention is limited by claim and equivalent thereof.
Claims (8)
1. a LED constant current driving device, it includes rectification module (10), constant flow module and lighting module (30), and described lighting module (30) includes several LED unit,
It is characterized in that,
The outfan of described rectification module (10) connects described lighting module (30), and described constant flow module is connected with described lighting module (30),
Described constant flow module includes several flow-restriction and a sampling unit (20), and each flow-restriction all includes a resistance, a stabilivolt, an audion and a transistor,
In each flow-restriction, the drain electrode of its transistor is commonly connected to the outfan of corresponding LED unit with one end of its resistance, the grid of its transistor connects the colelctor electrode of the other end of its resistance, the negative terminal of its stabilivolt and its audion, the source electrode of its transistor and the base stage of its audion connect described sampling unit (20) jointly, and the emitter stage of its audion be connected with the anode of its stabilivolt after ground connection
In each flow-restriction, the source electrode of its transistor and the base stage of its audion are all connected to the source electrode of the transistor of next flow-restriction and the base stage of audion via corresponding sampling resistor.
2. LED constant current driving device as claimed in claim 1, it is characterized in that, described rectification module (10) includes the first rectifier arm and the second rectifier arm that are made up of four diodes, the first diode (101) in described four diodes and the second diode (102) described first rectifier arm in series, the 3rd diode (103) in described four diodes and the 4th diode (104) described second rectifier arm in series.
3. LED constant current driving device as claimed in claim 2, it is characterised in that described diode is commutation diode or Schottky diode.
4. LED constant current driving device as claimed in claim 1, it is characterised in that the sampling resistor that described sampling unit (20) is serially connected by several is constituted.
5. LED constant current driving device as claimed in claim 1, it is characterised in that described transistor is N-MOSFET or NPN type triode.
6. LED constant current driving device as claimed in claim 1, it is characterised in that described flow-restriction also includes an electric capacity, and described Capacitance parallel connection is described stabilivolt extremely.
7. LED constant current driving device as claimed in claim 1, it is characterised in that described LED unit is made up of many or single low-voltage LED, described LED adopts the connected mode of series connection or connection in series-parallel combination to be attached.
8. LED constant current driving device as claimed in claim 1, it is characterised in that described LED unit is adopt the high-voltage LED module of COB encapsulation.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410850102.2A CN105813285A (en) | 2014-12-31 | 2014-12-31 | LED constant current driving device |
| PCT/CN2015/097195 WO2016107395A1 (en) | 2014-12-31 | 2015-12-11 | Led constant-current driving device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410850102.2A CN105813285A (en) | 2014-12-31 | 2014-12-31 | LED constant current driving device |
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| CN105813285A true CN105813285A (en) | 2016-07-27 |
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| WO2018219102A1 (en) * | 2017-05-31 | 2018-12-06 | 上海路傲电子科技有限公司 | Linear constant-current driving circuit |
| CN109618469A (en) * | 2019-01-28 | 2019-04-12 | 苏州菲达旭微电子有限公司 | A kind of linear High Power Factor driving circuit |
| CN110430636A (en) * | 2019-08-05 | 2019-11-08 | 深圳市安托山技术有限公司 | A kind of LED linear constant-current drive circuit inhibiting light decay |
| WO2022116707A1 (en) * | 2020-12-02 | 2022-06-09 | 深圳市晟碟半导体有限公司 | Led constant-power circuit and device |
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| CN107295721B (en) * | 2017-08-10 | 2023-05-09 | 广东工业大学 | LED drive circuit and LED electric indicator lamp |
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- 2014-12-31 CN CN201410850102.2A patent/CN105813285A/en active Pending
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2015
- 2015-12-11 WO PCT/CN2015/097195 patent/WO2016107395A1/en active Application Filing
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| EP2410818A2 (en) * | 2010-07-21 | 2012-01-25 | Advanced Connectek Inc. | Direct current driving circuit of a light emitting device |
| CN103152895A (en) * | 2013-03-26 | 2013-06-12 | 青海聚能达新能源开发有限公司 | Circuit for driving LEDs (light-emitting diode) by directly using alternating current |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018219102A1 (en) * | 2017-05-31 | 2018-12-06 | 上海路傲电子科技有限公司 | Linear constant-current driving circuit |
| CN109618469A (en) * | 2019-01-28 | 2019-04-12 | 苏州菲达旭微电子有限公司 | A kind of linear High Power Factor driving circuit |
| CN110430636A (en) * | 2019-08-05 | 2019-11-08 | 深圳市安托山技术有限公司 | A kind of LED linear constant-current drive circuit inhibiting light decay |
| WO2022116707A1 (en) * | 2020-12-02 | 2022-06-09 | 深圳市晟碟半导体有限公司 | Led constant-power circuit and device |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2016107395A1 (en) | 2016-07-07 |
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