CN104780646B - A kind of LED drive circuit for supporting controllable silicon light modulation - Google Patents
A kind of LED drive circuit for supporting controllable silicon light modulation Download PDFInfo
- Publication number
- CN104780646B CN104780646B CN201410017224.3A CN201410017224A CN104780646B CN 104780646 B CN104780646 B CN 104780646B CN 201410017224 A CN201410017224 A CN 201410017224A CN 104780646 B CN104780646 B CN 104780646B
- Authority
- CN
- China
- Prior art keywords
- module
- field
- effect tube
- led
- voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The present invention relates to a kind of LED drive circuit for supporting controllable silicon light modulation, including：Controllable silicon dimmer, input protection location, rectification module, sampling module, control module and lighting module, the rectification module are used to power to the lighting module.The controllable silicon dimmer is arranged between ac power input end and the input protection location.The output terminal of the rectification module connects the sampling module and the lighting module, the control module are arranged between the sampling module and the lighting module.The control module includes multiple switch unit, and the lighting module includes multiple LED modules.The output terminal and lighting module of the switch unit connection sampling module, the serial or parallel connection for the voltage signal control LED module that the switch unit is exported according to sampling module.The LED drive circuit of the present invention supports controllable silicon light modulation, can be compatible with lighting infrastructure now, has a wide range of application.
Description
Technical field
The present invention relates to a kind of LED drive circuit, more particularly, to a kind of LED drive circuit for supporting controllable silicon light modulation.
Background technology
LED is as a kind of new light sources of high benefit, and due to having many advantages, such as long lifespan, low energy consumption, energy conservation and environmental protection, just extensively
Applied to industry, the illumination of agricultural, commercial field.
When LED is as lamp light source, lamps and lanterns usage time depends not only on LED, further includes the components such as driving power.
In current application scheme, the bottleneck of LED lamp usage time is still power supply, and often the usage time of power supply determines
The usage time length of LED lamp, and the usage time length of power supply is then largely limited to the service life of electrolytic capacitor.
In order to exclude limitation of the power using time to the length of the usage time of LED lamp, one side of developer as far as possible
The physical life of existing scheme power supply is improved in face, the simplification power supply of a variety of driving LED is on the other hand devised, including easy to be non-
Isolate the driving of buck topological structures, resistance-capacitance type driving and the AC that the companies such as Seoul (Soul) propose now directly drive.
But the type of drive of these easy schemes, all there are a fatal weakness：LED current is fluctuated with power-supply fluctuation, is caused
When voltage ripple of power network, there is electric current and significantly changes in LED light, and shows as the brightness change or light of LED light
Shake, generates undesirable user experience, long-time service can also bring eyesight damage.
Such as Fig. 1（a）It is shown, it is the basic structure of the load end of existing serial parallel conversion scheme, it is only single comprising two switches
Member, two LED modules, a constant current unit, a high-voltage diode.By the unidirectional sine wave arteries and veins for detecting rectification module back
The instantaneous value of dynamic ripple, control switch K1 and the on off operating mode for switching K2, realize the series connection of LED and the switching of parallel connection, work as inspection
When the instantaneous value measured is relatively low, K1 and K2 conductings, such as Fig. 1（a）Shown, two groups of LED modules are in parallel, current waveform such as Fig. 1（c）Institute
Show, since only there are one constant current unit, transient power is less than the 1/2 of maximum power；With the rise of transient voltage, control circuit
Control switch K1 and K2 is disconnected, such as Fig. 1（b）It is shown, two groups of LED module series connection, current waveform such as Fig. 1（d）It is shown.When transient state electricity
When pressure is begun to decline, switching tube K1 is similar with the operating mode of K2.The program cannot keep the power perseverance of LED module during connection in series-parallel
It is fixed.
On the other hand, its core of LED is diode PN sections, and IV characteristics are exponential function, when the voltage for being added in both ends is big
After voltage is started, quickly increased by the PN electric currents saved.Using existing AC direct drive modes, when additional voltage increases
Width is slightly a little bigger, it is possible to directly damage LED component.In addition the applied voltage scope that present AC directly drives is all narrower
It is small, there is more inconvenience in practical application, and be also various, operating voltage range in the standard value of current international voltage
Narrow and small AC, which directly drives, will work without popularization, while also bring a series of problem such as stock control and production.It is existing
Using the AC direct drivings of serial parallel conversion, by detecting the instantaneous value of unidirectional sinuous pulsation ripple, adjust LED's in real time
Connection in series-parallel relation it is intended that improving utilization of the power supply in time domain, while keeps higher power factor.But still do not have
Solve the problems, such as that full voltage range works.
Incandescent lamp and ratio shared by halogen lamp are also very big at present, incandescent lamp and halogen lamp generally use controllable silicon light modulation.
Specifically, it has been mounted with the incandescent lamp of thyristor regulating photoelectric source or the place of halogen lamp, to be mounted on wall at some
Silicon-controlled dimmer switch and knob has also been mounted with two connecting lines for leading to lamps and lanterns in wall, to replace on wall can
Control transwitch and the number for increasing connecting line are not so easily.If LED want substitute controllable silicon light modulation incandescent lamp and
The position of halogen lamp just will be also compatible with controllable silicon light modulation.Support the LED drive circuit of controllable silicon light modulation technology not at present
Working range with full voltage, and the power factor of circuit is relatively low.For example, Chinese patent discloses CN201210044947.3 public affairs
A kind of LED drive circuit for thyristor regulating economize on electricity road is opened, driving circuit is by rectifier bridge, zener diode, two pole of constant current
Pipe, LED array and resistance concatenate.Although the technical solution supports controllable silicon light modulation and simple in structure, its LED driving electricity
Road does not have the working range of full voltage, and power factor is low, has and significantly uses defect.
The content of the invention
In order to overcome existing LED drive circuit technology above shortcomings, the present invention provides a kind of support is silicon-controlled
The LED drive circuit of light modulation, including：Controllable silicon dimmer, input protection location, rectification module, sampling module, control module
And lighting module, the rectification module are used to power to the lighting module,
It is characterized in that,
The controllable silicon dimmer is arranged between ac power input end and the input protection location,
The output terminal of the rectification module connects the sampling module and the lighting module, the control module are arranged at
Between the sampling module and the lighting module,
The control module includes multiple switch unit, and the lighting module includes multiple LED modules, the switch unit
Connect the output terminal of the sampling module and the lighting module, the voltage that the switch unit is exported according to the sampling module
Signal controls the serial or parallel connection of LED module.
According to a preferred embodiment, the input protection location is made of fuse and varistor, wherein,
The input terminal of the fuse connects the controllable silicon dimmer, the output terminal connection varistor of the fuse
With an input terminal of the rectification module, the varistor is connected in parallel between the output terminal and zero curve of the fuse.
According to a preferred embodiment, the rectification module includes the first rectifier arm being made of four rectifier diodes
With the second rectifier arm, the first rectifier diode and the 3rd rectifier diode in series first in four rectifier diodes
Rectifier arm, the second rectifier diode and the second rectification in series of the 4th rectifier diode in four rectifier diodes
Arm.
According to a preferred embodiment, the sampling module includes two divider resistances and a rectifier diode,
In, the first divider resistance and the second divider resistance be connected in the way of being one another in series the rectification module output plus terminal and
Between exporting negative terminal, the anode of the rectifier diode connects the connection between first divider resistance and the second divider resistance
Node, and the cathode of the rectifier diode constitutes the output terminal of the sampling module.
According to a preferred embodiment, the lighting module further includes multiple constant current units and several high-voltage diodes,
Wherein, each LED module connects a corresponding constant current unit to keep each LED module power one at work respectively
It causes, wherein each constant current unit is connected to next LED module via a high-voltage diode respectively.
According to a preferred embodiment, the LED module is made of the LED chip of multiple series connection, the LED module
The input terminal of the corresponding constant current unit of output terminal connection, the output terminal of the corresponding constant current unit of anode connection of the high-voltage diode and
One end of next switch unit, one end of the corresponding switch unit of cathode connection of the high-voltage diode and next LED module
Input terminal, the high-voltage diode prevent that voltage is played a reversed role during the LED module connection in series-parallel.
According to a preferred embodiment, the control module includes multiple switch unit, wherein,
First switch unit includes two resistance, a capacitance and two field-effect tube,
Wherein, the grid of the first field-effect tube connects the output terminal of the sampling module, the source of first field-effect tube
Pole connects the output negative terminal of the rectification module, and the drain electrode of first field-effect tube is connected to second resistance via first resistor
One end and the second field-effect tube grid, the drain electrode of second field-effect tube and the other end of second resistance are connected to described
The output plus terminal of rectification module, and
Wherein, one end of the first capacitance connects the grid of second field-effect tube, and the other end of the first capacitance and
The source electrode of second field-effect tube is commonly connected to the cathode of high-voltage diode.
According to a preferred embodiment, each switch in the control module in addition to the first switch unit
Unit includes a resistance, a capacitance and two field-effect tube respectively, wherein,
The grid of 3rd field-effect tube connects the output terminal of the sampling module, the drain electrode of the 3rd field-effect tube via
3rd resistor is connected to the drain electrode of the 4th field-effect tube and the anode of the high-voltage diode, and the drain electrode of the 4th field-effect tube
It is connected to each other with the anode of the high-voltage diode,
The drain electrode of 3rd field-effect tube is additionally coupled to one end of the second capacitance and the grid of the 4th field-effect tube,
The source electrode of the source electrode of 3rd field-effect tube, the other end of second capacitance and the 4th field-effect tube is connected to described
The output negative terminal of rectification module.
According to a preferred embodiment, in the switch unit, the grid of first field-effect tube and described
The grid of three field-effect tube is connected to the output terminal of the sampling module,
When the output voltage of the sampling module is less than predetermined switching voltage, first field-effect tube and described the
Three field-effect tube are ended, second field-effect tube and the 4th field-effect tube conducting so that corresponding several LED module structures
Into parallel relationship,
When the output voltage of the sampling module is higher than predetermined switching voltage, first field-effect tube and described the
Three field-effect tube turn on, second field-effect tube and the 4th field-effect tube cut-off so that corresponding several LED module structures
Into series relationship.
According to a preferred embodiment, the constant current unit is current regulator diode or the constant current being made of constant current metal-oxide-semiconductor
Circuit, and the constant current unit passes through the electric current of corresponding LED module and is consistent so that it is each in the lighting module
The power of LED module power in series connection and parallel operation remains unchanged.
The beneficial effects of the invention are as follows：
LED drive circuit supports controllable silicon light modulation, can be compatible with lighting infrastructure now, has a wide range of application.LED drives
Dynamic circuit is applied to directly driven by AC, it can be achieved that the LED of directly driven by AC is in full voltage using intelligent topological transformation technology
Scope works.Each LED module is connected with corresponding constant current unit, the power that can be kept constant.With input protection location,
Can in ac input circuit overcurrent, overvoltage protection.The LED drive circuit of the present invention can be with default at least two center
Electrical voltage point is worked with fixed power, and keeps higher power factor.
Description of the drawings
Fig. 1（a）It is existing series-parallel conversion loading section principle of parallel figure；
Fig. 1（b）It is existing series-parallel conversion loading section tandem principle figure；
Fig. 1（c）Current waveform figure during existing series-parallel conversion loading section parallel connection；
Fig. 1（d）Current waveform figure during existing series-parallel conversion loading section series connection；
Fig. 2（a）It is serioparallel exchange loading section principle of parallel figure of the present invention；
Fig. 2（b）It is serioparallel exchange loading section tandem principle figure of the present invention；
Fig. 2（c）Current waveform figure when being series-parallel conversion loading section parallel connection of the present invention；
Fig. 2（d）Current waveform figure when being series-parallel conversion loading section series connection of the present invention；
Fig. 3 is unidirectional sinuous pulsation ripple oscillogram；
Fig. 4 is a kind of advantageous applications scheme circuit diagram of the present invention；
Fig. 5 is a kind of typical circuit schematic diagram of constant current unit；
Fig. 6（a）It is the input current waveform figure of the light modulation phase of the present invention；
Fig. 6（b）It is the input current waveform figure of another light modulation phase of the present invention；
Fig. 7 is the modular structure block diagram of the present invention；With
Fig. 8 is a kind of advantageous applications scheme of the present invention and a kind of connection figure of controllable silicon dimmer.
Specific embodiment
Illustrate the present invention below in conjunction with the accompanying drawings.Fig. 4 is a kind of preferred embodiment circuit diagram of the LED drive circuit of the present invention.
The LED drive circuit of the support controllable silicon light modulation of the present invention includes：Controllable silicon dimmer TRIAC, input protection location, rectification mould
Block 120, sampling module 130, control module 140 and lighting module 160.Rectification module 120 is used to power to lighting module 160.
Controllable silicon dimmer TRIAC is arranged between ac power input end and input protection location.The output terminal of rectification module 120 connects
Connect sampling module 130 and lighting module 160.Control module 140 is arranged between sampling module 130 and lighting module 160.Illumination
Module 160 includes multiple LED modules, multiple constant current units and several high-voltage diodes, wherein, each LED module is connected respectively
Corresponding constant current unit, each constant current unit are connected to next LED module by high-voltage diode.In Fig. 2（a）In, it is permanent
It is, for example, current regulator diode 601 and current regulator diode 603 to flow unit.
When input AC alternating current connect access controllable silicon dimmer TRIAC carry out phase modulation light modulation when, due to sampling module
130 samplings are voltage transient values after rectification, therefore the switching of switching tube is unaffected.When input voltage is higher（Such as volume
Determine 220V）, it is typical two light modulation phase input current waveforms it is as shown in Figure 6.Input power is sampled by sampling module 130
Instantaneous value, so as to judge the transient voltage of input power, so determine therefrom that load LED using series connection or parallel connection knot
Structure.It connects in each individual LED module constant current unit, to ensure the operating voltage of each unit, and then is maintained at series connection
Or during parallel connection, the general power of system is consistent.Intelligent topological transformation technology is applied to directly driven by AC, it can be real
The LED that existing AC directly drives works in full voltage range, and the power kept constant, while keeps high power factor.LED drives
Dynamic circuit supports controllable silicon light modulation, can be compatible with power infrastructures now, has a wide range of application.
Such as Fig. 2（a）It is shown, for the basic structure of the load end of the serial parallel conversion scheme of the present invention, include at least two
A switch unit, two LED modules, two constant current units, a high-voltage diode.By detecting 120 back of rectification module
The instantaneous value of unidirectional sine wave pulsating wave, control switch K1 and the on off operating mode for switching K2 realize series connection and the parallel connection of LED
Switching.When the instantaneous value detected is default low-voltage, K1 and K2 conductings, such as Fig. 2（a）Shown, two groups of LED modules are simultaneously
Connection, current waveform such as Fig. 2（c）It is shown.Since each LED module is connected, there are one constant current units（Such as the constant current two in figure
Pole pipe 601 and 603）, the power of each LED module is consistent, and whole lamp power is constant.If the instantaneous value of detection reaches default
High-voltage value, control circuit control switch K1 and K2 are disconnected, such as Fig. 2（b）Shown, two groups of LED module series connection, current waveform is as schemed
2（d）It is shown.Under two kinds of voltage status, LED power is consistent, that is, realizes the input voltage of two scopes（Typically
110V and 220V）Under state, LED power is consistent, and since sampled voltage is instantaneous value, is supported TRIAC light modulations, is passed through reduction
The LED quantity of single-string LED series connection, increases number of fragments, it is made to work under full voltage operating mode more stable.
One kind is illustrated in figure 4 preferably using basic principle figure, including input protection location, rectification module 120, sampling
Module 130, switch unit, LED module and constant current unit.As a preferred embodiment, Fig. 4 is with two constant current units, one
It is described exemplified by a high-voltage diode and two LED modules.
Input protection location is made of fuse 101 and varistor 102, and one end of fuse connects fire as input terminal
Line L, the other end are connected with an input terminal of rectification module 120.One varistor 102 is connected in parallel on the two of rectification module 120
Between a input terminal.Specifically, one end connection firewire of varistor 102 and one end of rectification module 120, other end connection
Another input terminal of zero curve N and rectification module 120.The anode of first rectifier diode 201 and the 3rd rectifier diode 203
Negative terminal is connected, and the connecting node of the two constitutes an input terminal of rectification module 120.Second rectifier diode 202 is just
End is connected with the negative terminal of the 4th rectifier diode 204, and the connecting node of the two constitutes another input of rectification module 120
End.First rectifier diode 201 is connected with the negative terminal of the second rectifier diode 202, and connecting node constitutes rectification module
120 output plus terminal.3rd rectifier diode 203 is connected with the anode of the 4th rectifier diode 204, and connecting node is formed
The output negative terminal of rectification module 120.
The anode of first LED module is connected to the output plus terminal of rectification module 120, the connection constant current of the first LED module negative terminal
601 anode of diode.601 negative terminal of current regulator diode is connected with the anode of high-voltage diode 602, and high-voltage diode 602 is born
The anode of the second LED module of end connection.
The anode of the negative terminal connection current regulator diode 603 of second LED module, the negative terminal of current regulator diode 603 is connected to whole
The output negative terminal of flow module 120.Current regulator diode 601 and 603 described herein constitutes constant current unit in the sense of the present invention.
Sampling module 130 is connected in parallel between the output plus terminal and negative terminal of rectification module 120.Sampling module 130 is by two points
Piezoresistance and a rectifier diode 303 are formed.First divider resistance 301 is connected with the second divider resistance 302.First partial pressure electricity
One end of resistance 301 is connected to the output plus terminal of rectification module 120, and the other end of the first divider resistance 301 and the second partial pressure are electric
One end of resistance 302 is connected with the anode of rectifier diode 303.The other end of second divider resistance 302 is connected to rectification module 120
Export negative terminal.The negative terminal of rectifier diode 303 constitutes the output terminal of sampling module 130.The voltage that sampling module 130 samples
For unidirectional sinuous pulsation ripple, waveform is consistent with the unidirectional sinuous pulsation ripple of 120 rear end of rectification module.
The output terminal of the grid connection sampling module 130 of first field-effect tube 401, the source electrode of the first field-effect tube 401 connect
Connect the output negative terminal of rectification module 120.The drain electrode of first field-effect tube 401 is connected to second resistance 403 via first resistor 402
One end and the second field-effect tube 405 grid.The drain electrode of second field-effect tube 405 is connected with the other end of second resistance 403
To the output plus terminal of rectification module 120.One end of first capacitance 404 connects the grid of the second field-effect tube 405, and the first electricity
Hold 404 other end and the source electrode of the second field-effect tube 405 is commonly connected to the cathode of high-voltage diode 602.
The output terminal of the grid connection sampling module 130 of 3rd field-effect tube 501, the drain electrode warp of the 3rd field-effect tube 501
The drain electrode of the 4th field-effect tube 505 and the anode of high-voltage diode 602 are connected to by 3rd resistor 503.4th field-effect tube 505
Drain electrode and the anode of high-voltage diode 602 be connected to each other.The drain electrode of 3rd field-effect tube 501 is additionally coupled to the second capacitance
504 one end and the grid of the 4th field-effect tube 505.The source electrode of 3rd field-effect tube 501, the second capacitance 504 the other end and
The source electrode of 4th field-effect tube 505 is connected to the output negative terminal of rectification module 120.
In Fig. 4, each LED module of lighting module 160 is connected respectively, and there are one corresponding constant current unit, each constant currents
Unit is connected to next LED module via a high-voltage diode.Constant current unit is intended to control and flows through corresponding LED module
Electric current keeps substantially constant.In Fig. 4, the output terminal of the first LED module is connected to high-voltage diode via constant current unit 601
602 anode.The cathode of high-voltage diode 602 is connected to the input terminal of another LED module.Second field-effect tube 405 is used as and opens
Unit is closed to be connected in parallel on the output terminal of first LED module and the cathode of high-voltage diode 602.Specifically, second
The source electrode of effect pipe 405 is connected to the negative terminal of high-voltage diode 602, and the grid of the second field-effect tube 405 is via second resistance 403
Be connected to the output plus terminal of rectification unit, and the drain electrode of the second field-effect tube 405 be connected to the first LED module input terminal and
The output plus terminal of rectification module 120.4th field-effect tube 505 is being connected in high-voltage diode 602 in parallel just as switch unit
On the negative terminal of another current regulator diode 603 of the pole with being located at the second LED module downstream.Specifically, the 4th field-effect tube 505
Source electrode is connected to the negative terminal of current regulator diode 603 and the output negative terminal of rectification module.The grid of 4th field-effect tube 505 is via
Three resistance 503 are connected to the cathode of the constant current unit 601 of the first LED module, and the grid of the 4th field-effect tube 505 is connected to
The source electrode of 3rd field-effect tube 501.The drain electrode of 4th field-effect tube 505 is connected directly to the constant current unit 601 of the first LED module
Cathode.
Electric main is transferred to rectification module 120 through inputting protection location, becomes unidirectional positive taut pulse by rectification module 120
Ripple is rushed, by 130 sampled voltage instantaneous value of sampling module.When input voltage is pre-set low pressure（Such as the voltage centered on 110V
Scope）, then sampled voltage is less than default switching voltage.At this point, the first field-effect tube 401 and the 3rd field-effect tube 501 are ended,
And the second field-effect tube 405 and the 4th field-effect tube 505 turn on, so that two LED modules form parallel relationship.Due to two
A LED module has been connected constant current unit 601 and 603 respectively, so the electric current flowed through in two LED modules is that constant current unit is pre-
If electric current.It inputs shown in total current such as Fig. 2 (d), input current 2*Imax.High-voltage diode 602 is connected in series in the first LED
Between module and the second LED module, to prevent voltage from playing a reversed role, power P ≈ Vin1*2Imax.When input voltage is default height
Voltage（Such as the voltage range centered on 220V）, then the voltage sampled is higher than default switching voltage.At this point, first effect
Should 401 and the 3rd field-effect tube 501 of pipe turn on, and the second field-effect tube 405 and the 4th field-effect tube 505 are ended so that two
LED module forms series relationship.At this point, the electric current of LED is flowed through as constant current unit predetermined current, input total current such as Fig. 2（c）Institute
Show, input current Imax.Since in time domain, each LED module can be consistent power.Therefore under foregoing two states
Power is equal to each other, that is, the output power realized under two center voltages is consistent.Achieve the purpose that full voltage works.
The constant current unit, can be current regulator diode or other driving chips with equivalent function or
Circuit, such as the constant-current circuit based on metal-oxide-semiconductor.It is illustrated in figure 5 a kind of constant current unit circuit diagram made reference using TL431.
Application based on the present invention is also not necessarily limited to be divided to two sections of application, to promote effect, multistage can be divided to be controlled.
Directly driven by AC is applied to using intelligent topological transformation technology, it can be achieved that the LED that directly drive of AC are in full voltage
Scope works, and the power kept constant, while keeps high power factor.By sampling the instantaneous value of input power, so as to
Judge the voltage of input power, and then determine structures of the load LED using series connection or parallel connection, in each individual LED module
Upper series connection constant current unit, to ensure the operating voltage of each unit, during being maintained at state in series or in parallel, the total work of system
Rate is consistent.Support controllable silicon light modulation so that the application range of LED is wider.Controllable silicon dimmer price is low, therefore also has
Cost advantage.
The present invention has at least the following advantages：
1st, LED drive circuit is applied to directly driven by AC, it can be achieved that exchange is directly driven using intelligent topological transformation technology
Dynamic LED works in full voltage range.
2nd, each LED module is connected with corresponding constant current unit, the power that when work can keep constant.
3rd, LED drive circuit have input protection location, can in ac input circuit overcurrent, overvoltage protection.
4th, LED drive circuit of the invention can be worked with default at least two center voltages point with fixed power,
And keep higher power factor.
5th, LED drive circuit supports controllable silicon light modulation, can be compatible with lighting infrastructure now, has a wide range of application.
It should be noted that above-mentioned specific embodiment is exemplary, and under the above-mentioned introduction of the present invention, art technology
Personnel can carry out various improvement and deformation on the basis of above-described embodiment, and these are improved or deformation falls the present invention's
In protection domain.It will be understood by those skilled in the art that specific descriptions above are intended merely to explain the purpose of the present invention, not
For limiting the present invention.Protection scope of the present invention is limited by claim and its equivalent.
Claims (9)
1. a kind of LED drive circuit for supporting controllable silicon light modulation, including：Controllable silicon dimmer, input protection location, rectification mould
Block (120), sampling module (130), control module (140) and lighting module (160), the rectification module (120) are used for institute
State lighting module (160) power supply, which is characterized in that
The controllable silicon dimmer is arranged between ac power input end and the input protection location, the rectification module
(120) output terminal connects the sampling module (130) and the lighting module (160), the control module (140) are arranged at
Between the sampling module (130) and the lighting module (160), the control module (140) includes multiple switch unit, institute
Stating lighting module (160) includes multiple LED modules, and the switch unit connects output terminal and the institute of the sampling module (130)
Lighting module (160) is stated, the voltage signal that the switch unit is exported according to the sampling module (130) controls LED module
Serial or parallel connection；
The control module (140) includes multiple switch unit, wherein, first switch unit includes two resistance, a capacitance
With two field-effect tube, wherein, the grid of the first field-effect tube (401) connects the output terminal of the sampling module (130), described
The source electrode of first field-effect tube (401) connects the output negative terminal (OUT2) of the rectification module (120), first field-effect tube
(401) drain electrode is connected to one end of second resistance (403) and the grid of the second field-effect tube (405) via first resistor (402)
Pole, the drain electrode of second field-effect tube (405) and the other end of second resistance (403) are connected to the rectification module (120)
Output plus terminal (OUT1), and wherein, one end of the first capacitance (404) connects the grid of second field-effect tube (405),
And the other end of the first capacitance (404) and the source electrode of second field-effect tube (405) are commonly connected to high-voltage diode
(602) cathode.
2. LED drive circuit according to claim 1, which is characterized in that the input protection location is by fuse (101)
It is formed with varistor (102), wherein, the input terminal of the fuse (101) connects the controllable silicon dimmer, the insurance
The output terminal connection varistor (102) of silk (101) and an input terminal of the rectification module (120), the varistor
(102) it is connected in parallel between the output terminal of the fuse (101) and zero curve (N).
3. LED drive circuit according to claim 1, which is characterized in that the rectification module (120) includes whole by four
Flow the first rectifier arm and the second rectifier arm that diode is formed, the first rectifier diode in four rectifier diodes
(201) and the 3rd rectifier diode (203) the first rectifier arm in series, the second rectification two in four rectifier diodes
Pole pipe (202) and the 4th rectifier diode (204) the second rectifier arm in series.
4. LED drive circuit according to claim 1, which is characterized in that the sampling module (130) includes two partial pressures
Resistance and a rectifier diode (303), wherein, the first divider resistance (301) and the second divider resistance (302) according to going here and there each other
The mode of connection is connected between the output plus terminal of the rectification module (120) and output negative terminal, the rectifier diode (303)
Anode connects the connecting node between first divider resistance (301) and the second divider resistance (302), and the rectification two
The cathode of pole pipe (303) constitutes the output terminal of the sampling module (130).
5. LED drive circuit according to claim 1, which is characterized in that the lighting module (160) further includes multiple perseverances
Unit and several high-voltage diodes are flowed, wherein, each LED module connects a corresponding constant current unit to keep each respectively
Power is consistent at work for LED module, wherein each constant current unit be connected to respectively via a high-voltage diode it is next
LED module.
6. LED drive circuit according to claim 5, which is characterized in that the LED module by multiple series connection LED core
Piece forms, the input terminal of the corresponding constant current unit of output terminal connection of the LED module, the anode connection pair of the high-voltage diode
The output terminal of constant current unit and one end of next switch unit are answered, the corresponding switch unit of cathode connection of the high-voltage diode
One end and the input terminal of next LED module, the high-voltage diode prevent that voltage is played a reversed role during the LED module connection in series-parallel.
7. LED drive circuit according to claim 1, which is characterized in that except described in the control module (140)
Each switch unit outside one switch unit includes a resistance, a capacitance and two field-effect tube respectively, wherein, the 3rd
The grid of field-effect tube (501) connects the output terminal of the sampling module (130), the drain electrode of the 3rd field-effect tube (501)
The drain electrode of the 4th field-effect tube (505) and the anode of the high-voltage diode (602) are connected to via 3rd resistor (503), and
And the 4th field-effect tube (505) drain electrode and the anode of the high-voltage diode (602) be connected to each other, the 3rd effect
The drain electrode that (501) should be managed is additionally coupled to one end of the second capacitance (504) and the grid of the 4th field-effect tube (505), described
The source of the source electrode of 3rd field-effect tube (501), the other end of second capacitance (504) and the 4th field-effect tube (505)
Pole is connected to the output negative terminal (OUT2) of the rectification module (120).
8. LED drive circuit according to claim 7, which is characterized in that in the switch unit, first effect
The grid of (401) should be managed and the grid of the 3rd field-effect tube (501) is connected to the output of the sampling module (130)
End, when the sampling module (130) output voltage be less than predetermined switching voltage when, first field-effect tube (401) and
3rd field-effect tube (501) cut-off, second field-effect tube (405) and the 4th field-effect tube (505) conducting, make
It obtains corresponding several LED modules and forms parallel relationships, when the output voltage of the sampling module (130) is higher than predetermined switching electricity
During pressure, first field-effect tube (401) and the 3rd field-effect tube (501) conducting, second field-effect tube (405) and
4th field-effect tube (505) cut-off so that corresponding several LED modules form series relationship.
9. LED drive circuit according to claim 5, which is characterized in that the constant current unit for current regulator diode or by
The constant-current circuit that constant current metal-oxide-semiconductor is formed, and the constant current unit passes through the electric current of corresponding LED module and is consistent, and makes
In the lighting module (160) power of each LED module power when serial or parallel connection works remain unchanged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410017224.3A CN104780646B (en) | 2014-01-15 | 2014-01-15 | A kind of LED drive circuit for supporting controllable silicon light modulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410017224.3A CN104780646B (en) | 2014-01-15 | 2014-01-15 | A kind of LED drive circuit for supporting controllable silicon light modulation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104780646A CN104780646A (en) | 2015-07-15 |
| CN104780646B true CN104780646B (en) | 2018-06-05 |
Family
ID=53621787
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410017224.3A Active CN104780646B (en) | 2014-01-15 | 2014-01-15 | A kind of LED drive circuit for supporting controllable silicon light modulation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104780646B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3863378A1 (en) * | 2020-02-04 | 2021-08-11 | OSRAM GmbH | Lighting module and corresponding lighting system |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017176141A1 (en) * | 2016-04-05 | 2017-10-12 | Rus Adrian Loan | Method of reducing the harmonic content of the currents sunk by led strings driven by an integrated "direct ac" power supply and apparatuses associated to the method |
| CN107567133B (en) * | 2017-08-30 | 2019-06-04 | 上海亚明照明有限公司 | Work in the LED constant current control device under a variety of line voltages |
| CN107896406B (en) * | 2017-12-29 | 2019-08-16 | 东莞艾笛森光电有限公司 | A kind of synchronous dimming driving circuit |
| CN108828991A (en) * | 2018-07-26 | 2018-11-16 | 苏州力生美半导体有限公司 | A kind of universal self-adaption constant power heater circuit and its device |
| CN212910138U (en) * | 2020-05-06 | 2021-04-06 | 广东微观科技有限公司 | High-voltage lamp band harmonic control circuit |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101711071A (en) * | 2009-11-25 | 2010-05-19 | 海洋王照明科技股份有限公司 | LED control circuit and LED device |
| CN101861018A (en) * | 2010-05-05 | 2010-10-13 | 金杲易光电科技(深圳)有限公司 | LED switch power supply capable of dimming |
| CN202617405U (en) * | 2012-05-22 | 2012-12-19 | 深圳市长运通光电技术有限公司 | LED lighting device |
| CN203086825U (en) * | 2013-02-21 | 2013-07-24 | 殷俊 | LED (Light Emitting Diode) driving circuit based on constant-current diode |
-
2014
- 2014-01-15 CN CN201410017224.3A patent/CN104780646B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101711071A (en) * | 2009-11-25 | 2010-05-19 | 海洋王照明科技股份有限公司 | LED control circuit and LED device |
| CN101861018A (en) * | 2010-05-05 | 2010-10-13 | 金杲易光电科技(深圳)有限公司 | LED switch power supply capable of dimming |
| CN202617405U (en) * | 2012-05-22 | 2012-12-19 | 深圳市长运通光电技术有限公司 | LED lighting device |
| CN203086825U (en) * | 2013-02-21 | 2013-07-24 | 殷俊 | LED (Light Emitting Diode) driving circuit based on constant-current diode |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3863378A1 (en) * | 2020-02-04 | 2021-08-11 | OSRAM GmbH | Lighting module and corresponding lighting system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104780646A (en) | 2015-07-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104780646B (en) | A kind of LED drive circuit for supporting controllable silicon light modulation | |
| CN103108470B (en) | Dynamic linear control light emitting diode (LED) driver circuit | |
| CN101657057B (en) | LED power circuit | |
| CN104427688B (en) | LED alternating-current drive circuit | |
| CN103648219B (en) | Light-emitting diode (LED) switch constant-current driving circuit | |
| CN107529241B (en) | A kind of linear Constant-power LED drive circuit of single hop and method | |
| CN107172755B (en) | A kind of LED light bar network current foldback circuit, driving power and television set | |
| CN102065610B (en) | LED (Light Emitting Diode) lamp control circuit | |
| CN203675387U (en) | LED drive circuit for providing TRIAC holding current by using controllable current source | |
| CN108668409A (en) | Driving circuit and lighting device for light emitting diode | |
| CN108966430B (en) | Linear driving circuit of LED lighting lamp | |
| CN205793482U (en) | A kind of zero-frequency dodges light modulation filament circuit for lamp | |
| WO2014110915A1 (en) | Led linear intelligent dimming module | |
| CN104812118A (en) | Light emitting diode illumination drive circuit and method using alternating current commercial power | |
| CN201550315U (en) | LED driving circuit | |
| CN102791063A (en) | Intelligent LED module with function of automatic voltage regulation | |
| CN110366296A (en) | Pass through the controller of power line communication, LED lamp and LED control system | |
| CN209572189U (en) | A kind of LED power thyristor regulating optical link | |
| US20150084516A1 (en) | Led-based lighting apparatus with low flicker | |
| CN103200735A (en) | Light-emitting diode (LED) actuator preventing LED from flickering | |
| CN203167355U (en) | LED driver preventing LED from flickering | |
| CN203761636U (en) | Universal alternating-current LED lamp | |
| CN208424855U (en) | A kind of three-stage dimming control circuit of LED light | |
| CN207070412U (en) | Constant current driving device and light fixture | |
| CN203340367U (en) | Light modulation circuit for LED illuminating lamp |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |