CN103108435B - Damping circuit, light-emitting diode (LED) driver and LED lighting system - Google Patents
Damping circuit, light-emitting diode (LED) driver and LED lighting system Download PDFInfo
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- CN103108435B CN103108435B CN201110359481.1A CN201110359481A CN103108435B CN 103108435 B CN103108435 B CN 103108435B CN 201110359481 A CN201110359481 A CN 201110359481A CN 103108435 B CN103108435 B CN 103108435B
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/10—Controlling the intensity of the light
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
- H05B45/3725—Switched mode power supply [SMPS]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention relates to a damping circuit used for a driver and for restraining flickering. The damping circuit comprises a first subcircuit and at least one damping element, wherein the first subcircuit is composed of a first capacitor and a first resistor which are in serial connection, and the first subcircuit is connected with an input voltage end. The damping circuit further comprises an identification control circuit comprising a detection module and a switch module, wherein the detection module collects at least one detection signal to produce a first control signal and a second control signal or to produce a third control signal or a fourth control signal, the representation of the at least one detection signal comes from voltage changes of the input voltage end, the first control signal is used for identifying that the front of the driver is not connected with a light modulator, the second control signal is used for identifying that the front of the driver is connected with the light modulator, the third control signal is used for identifying that the front of the driver is connected with a light modulator achieving a preset measurement, and the fourth control signal is used for identifying that the front of the driver is connected with the light modulator which does not achieve a preset measurement; and the switch module controls a working state of the damping element according to the first control signal or the third control signal and according to the second control signal or the fourth control signal. The damping circuit has the advantages of high generality, efficiency and energy conservation.
Description
Technical field
The present invention relates to a kind of antihunt circuit, LED driver and LED illumination System.
Background technology
In modern lighting device, particularly in LED light device, in order to obtain suitable for the bright of different lighting environments
Degree, proposes the Curve guide impeller with dimming function.The LED light device for installing light modulator of the prior art generally includes light modulation
Device 1 and LED driver 100 and load LED8, the LED driver 100 include that fairing 9, antihunt circuit 10, power are changed
Device 7, as shown in Figure 1.The antihunt circuit 10 generally includes electric capacity C1, resistance R1 and for example powerful damping element R '.If
The reason for putting antihunt circuit 10 be, the sudden strain of a muscle of LED can be constantly caused when light modulator is connected on LED driver to carry out dimming work
It is bright, antihunt circuit is additionally provided in for suppressing to flicker to avoid flicker from generally needing.It is main in this antihunt circuit
Electric current is by resistance high-power damping element R ' or other damping elements higher.But, due to damping element R ' consumption
Many power, therefore cause the power of LED driver to reduce.For example generally for the driver of 15W, effect loss is reachable
4%.In addition consume after the electric energy on damping element R ' is converted into heat energy, also by the life-span of the electronic component of LED driver
Have adverse effect on.
In order to improve the power of LED driver, it is necessary to reduce power of the consumption on high-power damping resistance, therefore often
Use dynamic switch.This method the disadvantage is that, the dynamic switch applied cannot recognize that driver whether and light modulator
Link together, i.e. the working condition of None- identified light modulator.Resulting consequence is：When driver is not connected with light modulator
When or light modulator is not when turning on, R ' be still within working condition and and then influence lighting device driver output work
Rate.
The content of the invention
Therefore it is an object of the present invention to propose a kind of antihunt circuit for LED driver, the antihunt circuit can be with root
It is actually needed according to difference, there is provided power output higher, the power that reduction is consumed on damping unit during non-dimmable is damaged
Consumption, with stronger versatility.
A kind of antihunt circuit for driver is proposed according to the present invention, for suppressing to flash, including：By being one another in series
The first electric capacity, first resistor constitute tie point and at least one damping element, tie point connection Input voltage terminal, its
It is characterised by, also including recognition control circuit, recognition control circuit includes detection functional module and switching function module, detects work(
Before energy module gathers at least one detection signal for characterizing the voltage change for coming from Input voltage terminal to produce identification driver
Not connected have first control signal and preceding the second control signal for being connected to light modulator of light modulator, or is connected to before generation driver
The 3rd control signal or light modulator for reaching the predetermined light modulator measured are not up to predetermined the 4th control signal measured, switch
Functional module is controlled according to the first control signal or the 3rd control signal and according to the second control signal or the 4th control signal
The working condition of damping element.Light modulator reaches the predetermined not on-state measured and for example can be understood as light modulator, and dims
Device is not up to the predetermined conducting state measured and can be understood as light modulator.
Design starting point of the invention is to characterize the voltage change for coming from Input voltage terminal by gathering on one's own initiative
Whether at least one detection signal, identified before the LED driver to there is light modulator, and is controlled according to recognition result
The working condition of the damping element in antihunt circuit.For example by controlling the working condition of powerful damping element, can keep away
Exempt from powerful damping element to be constantly in the working condition of power consumption.For example by control for example as the damping of inductor design
Element, can reduce in dimmer operation by inductance works brought noise.Using the LED of such antihunt circuit
Driver is not only suitable for the lighting circuit with light modulator, and being also suitable for the direct illumination apparatus of no light modulator carries out state control
The lighting circuit of system, cuts the different situations that light modulator cuts light modulator with after before being also applied for, and can be according to different applications
Situation is controlled to damping unit, so that reduce unnecessary power attenuation as much as possible, such as driver for 15W
Can be improved by driving power raising 2% or for the other performance of antihunt circuit.Further improvement of the present invention
Point is not only to be identified for the presence or absence of light modulator, and the working condition further to light modulator is identified, so that
Obtaining really is causing the moment of flicker just to connect powerful damping element, so as to further increasing energy-saving effect.
One of the invention preferred embodiment, and damping element is power resistor, and switching function module is according to
One control signal or the 3rd control signal will hinder by damping element short circuit and according to the second control signal or the 4th control signal
Buddhist nun's element switches.So as to improve driving effect of antihunt circuit, unnecessary power attenuation is reduced.
One of the invention preferred embodiment, and damping element is inductance, and switching function module is according to the first control
Damping element is connected and will damp unit according to the second control signal or the 4th control signal by signal processed or the 3rd control signal
Part short circuit.So as to reduce in dimmer operation by inductance works brought noise.
Preferably, detection functional module includes first detection module, and switching function module includes first switch module, first
Detection module gathers first detection signal to produce the first control from the first detection signal end between the first electric capacity and first resistor
Signal processed and the second control signal, first switch module control the working condition of damping element according to first, second control signal.
Can well reflect applying from the first detection signal end collection first detection signal between the first electric capacity and first resistor
Voltage on to first resistor and power resistor, can well symbolize the speed of the change of rectified input voltage, from
And detect the connection of light modulator or not connected.
In order to improve the versatility of antihunt circuit, realize and preceding cut matching for light modulator, first detection module includes producing
The first control signal of light modulator and the first detection unit of the second control signal are cut before being connected to before identifying whether.Preferably,
One detection unit is exported as the low level signal of the first control signal when light modulator is cut before not being connected to before or is connected to preceding
Before when cutting light modulator output as the second control signal high level signal.Because the cut angle that different lighting devices is used is adjusted
Light device cut before being divided into light modulator and after cut light modulator, therefore, cut before being directed to light modulator and after cut light modulator consider it is different
Detection unit, improves versatility.
In the specific embodiment of the invention, the first detection unit includes the first diode, is one another in series
Second resistance and 3rd resistor and the second electric capacity, the positive pole of the first diode are connected to first detection signal end and first
The negative pole of diode connects one end of second resistance, and the second electric capacity is in parallel with the second resistance, 3rd resistor that are one another in series, and second
It is provided for the letter of the control signal of the first or second control signal input first switch module between resistance and 3rd resistor
Number end, the other end of 3rd resistor is connected to the ground current potential.
Preferably, the first detection unit is exported as the low level of the first control signal when light modulator is cut before preceding not being connected to
Signal is exported as the high level signal of the second control signal when light modulator is cut before being preceding connected to.
One of the invention preferred embodiment, and the first detection unit includes the first diode, is one another in series
Second resistance and 3rd resistor and the second electric capacity, the positive pole of the first diode are connected to first detection signal end and first
The negative pole of diode connects one end of second resistance, and the second electric capacity is in parallel with the second resistance, 3rd resistor that are one another in series, and second
It is provided for being input into the first or second control signal the signal of first switch module control signal between resistance and 3rd resistor
End, the other end of second resistance is connected to the ground current potential.There is provided at the same time cut before detection light modulator and after cut the function of light modulator
In the case of, the positive pole of the first diode can be indirectly connected with first detection signal end.First detection unit is with less first device
Part just generates the first control signal and the second control signal that light modulator is cut before being connected to before detecting whether exactly, possesses cost
The cheap, advantage that detection precision is high.
Preferably, first switch module includes first switch element.First switch element is preferably the first transistor, damping
Element is connected between the working electrode of the first transistor and reference electrode, the reference electrode earthing potential of the first transistor.Profit
The direct control for damping element is realized with first switch element.
According to a preferred embodiment of the present invention, first switch module also includes the first clamper for the first transistor
Circuit, the first clamp circuit include being connected to the 4th electric capacity between the coordination electrode of the first transistor and ground potential and/
Or first voltage-regulator diode.The coordination electrode that the first transistor be may provide for using the first clamp circuit is in varied situations
Control.In the case of the electric capacity of first clamp circuit application the 4th, it is possible to achieve in ensureing power resistor when light modulation
Electric current is still flowed through, certain damping action is played, prevents the concussion of light modulator electric current from causing light flash.
Preferably, first switch module also includes second switch element, the first control letter from signal end for basis
Number and the second control signal control first switch element switch.Second switch element and low level first control signal or
Second control signal of high level matches application.Second switch element is transistor seconds, the coordination electrode of transistor seconds
The coordination electrode and reference electrode that the working electrode of connection signal end and transistor seconds is connected to the first transistor are grounded
Current potential.
According to a preferred embodiment of the present invention, first switch module also includes the second clamper for transistor seconds
Circuit, the second clamp circuit include being connected to the 3rd electric capacity between the coordination electrode of transistor seconds and ground potential and/
Or second voltage-regulator diode.Using the second clamp circuit, control of the realization for the voltage of the coordination electrode of transistor seconds.
Further preferred embodiment of the invention, first switch module also includes the 3rd voltage-regulator diode, the 3rd
One end of voltage-regulator diode is connected to signal end and the other end connects the coordination electrode of transistor seconds.Using the 3rd voltage stabilizing two
Pole pipe, further ensures that only in the case where the 3rd voltage-regulator diode is connected, and is possible to open transistor seconds, so that real
The control of the voltage of coordination electrode for transistor seconds is showed.
According to a preferred embodiment of the present invention, antihunt circuit also includes being connected to the second branch road of Input voltage terminal,
Including being one another in series as the 5th resistance of divider resistance and the 6th resistance, the coordination electrode of the first transistor connects second branch road
It is connected between the 5th resistance and the 6th resistance.By selecting the resistance of appropriate the 5th resistance and the 6th resistance, can be first
Apply the high level voltage of stabilization on transistor, the first control signal and the second control signal influence on it afterwards.
According to a preferred embodiment of the present invention, in order to improve the versatility of antihunt circuit, light modulator is cut in realization with after
Matching, there is provided the second detection unit, second detection unit include the 5th electric capacity, the second diode, the 5th electric capacity one end
Connection first detection signal end, the other end is respectively connecting to the positive terminal of the first diode and the negative pole of second diode
End, the positive terminal of the second diode is connected to the other end of 3rd resistor.It is single with reference to the first detection using the second detection unit
Unit, equally meets the need for cutting light modulator for after.5th electric capacity, the second diode and the first diode are detected first
Signal is adjusted to high level.
According to a preferred embodiment of the present invention, in order to improve the identification control function of antihunt circuit, function mould is detected
Block includes the second detection module, and the second detection module is produced before identifying whether and is connected to the 3rd control for reaching the predetermined light modulator measured
Signal processed or light modulator are not up to predetermined the 4th control signal measured.During embodiment is embodied at one, the second detection
Module is the 3rd branch road being made up of the 7th resistance and the 8th resistance being connected with Input voltage terminal, from the 7th resistance and the 8th electricity
The 3rd control signal or the 4th control signal are exported between resistance.So as to the electricity after direct access voltage input end voltage output partial pressure
Pressure.
Corresponding with the preferred embodiment, switching function module includes second switch module, first switch module root
Opening for damping element is controlled according to the 3rd control signal or the 4th control signal according to the second control signal and second switch module
Close.
In a preferred embodiment, second switch module includes third transistor, the 4th transistor, the 4th voltage stabilizing two
Pole pipe and the 9th resistance, the working electrode of third transistor are connected and its reference electrode with the reference electrode of transistor seconds
Connection ground potential, the coordination electrode of the 4th transistor is connected with the 4th voltage-regulator diode, and its working electrode is through the 9th resistance and the
The working electrode of two-transistor is connected and working electrode is connected with the coordination electrode of third transistor.So as to further increase
The sensing function and control ability of antihunt circuit, improve the light efficiency of affiliated LED driver.
The present invention also relates to a kind of driver and illuminator.
It should be understood that the general description of the above and the following detailed description are all enumerated and illustrative, it is therefore an objective to
In order to provide further instruction to claimed invention.
Brief description of the drawings
Accompanying drawing constitutes the part of this specification, is used to help further understand the present invention.These accompanying drawings illustrate this hair
Bright embodiment, and be used for illustrating principle of the invention together with specification.Identical part identical label in the accompanying drawings
Represent.Shown in figure：
Fig. 1 is the layout of light modulator according to prior art and LED driver；
Fig. 2 a are the antihunt circuits of the first specific embodiment of the invention；
Fig. 2 b are another embodiments of the antihunt circuit application of the first specific embodiment of the invention；
Fig. 3 a-3b, Fig. 4 a-4b respectively in the first specific embodiment of the invention before cut light modulator, after cut tune
The voltage waveform view of the unrectified input voltage waveform of light device and the coordination electrode of corresponding the first transistor.
Fig. 5 is the antihunt circuit of the second specific embodiment of the invention；
Fig. 6 a be first, second specific embodiment of the invention antihunt circuit in pass through when cutting light modulator in the pre-connection
The voltage oscillogram of the Input voltage terminal after rectification, the voltage oscillogram at first detection signal end and now flow into damping element
Current waveform figure；
Fig. 6 b be first, second specific embodiment of the invention antihunt circuit in it is rectified after Input voltage terminal
Comparison of wave shape figure of the voltage when light modulator is cut before light modulator and connection are cut before not connected；
Fig. 6 c be first, second specific embodiment of the invention antihunt circuit in cut before not connected light modulator and
The comparison of wave shape figure of the voltage of the coordination electrode of the first transistor when cutting light modulator before connection；
Fig. 7 is the antihunt circuit of the 3rd specific embodiment of the invention.
Specific embodiment
Fig. 2 a are the antihunt circuits 10 of the first specific embodiment of the invention.Antihunt circuit of the invention 10 has
There are the first electric capacity, first resistor and be mainly used in playing the damping element for suppressing flicker powerful element in other words, for example
In this specific embodiment, the powerful damping element is power resistor.It is pointed out that such as the first electric capacity, first
Resistance and power resistor have as antihunt circuit of the prior art, and its effect mainly suppresses flicker.
First specific embodiment of the invention, antihunt circuit of the invention 10 also includes recognition control circuit, is increasing
Plus after the recognition control circuit, antihunt circuit of the invention 10 is provided with light modulator identification function and is recognized according to light modulator
The respective control function that function is carried out.For example, antihunt circuit 10 can be controlled when being not connected with and having light modulator before identifying driver
Power resistor short circuit processed, and power resistor can be controlled to connect when light modulator is connected with before identifying driver, so as to realize
Good energy-saving effect.Certainly in other embodiments shown in (such as Fig. 2 b), antihunt circuit 10 can also control other resistances
Buddhist nun's element for example controls inductance L2, inductance L2 can be controlled to access when being not connected with and having light modulator before identifying driver, to change
Kind EMI and PF performances, and when light modulator is connected with before identifying driver, inductance L2 short circuits can be controlled, with reduce due to
The brought noise of inductance L2 work.
The recognition control circuit of antihunt circuit of the invention 10 includes detection functional module and switching function module, in order to produce
The the first control signal S1 and preceding the second control signal for being connected to light modulator 1 for having light modulator 1 are not connected with before raw identification driver 100
S2, antihunt circuit 10 includes first detection module 4, and switching function module includes first switch module 5.1.First detection module 4
Collection characterizes at least one detection signal of the voltage change for coming from Input voltage terminal Vin_DC to produce identification driver 100
Preceding the first control signal S1 and preceding the second control signal S2 for being connected to light modulator 1 for being not connected with having light modulator 1.In the specific implementation
In example, first detection module 4 is gathered from the first detection signal end V_Detector1 between the first electric capacity C1 and first resistor R1
First detection signal produces the first control signal S1 and the second control signal S2.
In order to increase the versatility of antihunt circuit of the invention 10, first detection module 4 connects before identifying whether including generation
First detection unit 4.1 of the first control signal S1 and the second control signal S2 of light modulator is cut before having.As shown in Figure 2 a, first
Second resistance R2 and 3rd resistor R3 and the second electric capacity C2 that detection unit 4.1 includes the first diode D1, is one another in series,
The positive pole of the first diode D1 is connected to the negative pole connection the of first detection signal end V_Detector1 and the first diode D1
One end of two resistance R2, the second electric capacity C2 is in parallel with the second resistance R2,3rd resistor R3 that are one another in series, second resistance R2 and
It is provided for the control signal of the first or second control signal S1, S2 input first switch module 5.1 between three resistance R3
Signal end V_out, the 3rd resistor R3 other ends are connected to the ground current potential.First diode D1, the second resistance R2 being one another in series and
3rd resistor R3 and the second electric capacity C2 constitute the first detection unit 4.1.
In order to according to the first or second control signal S1, S2 performs control process, sets first switch module 5.1, this
One switch module 5.1 includes first switch element, and first switch element is the first transistor Q1, and damping element R ' is connected to first
Between the working electrode and reference electrode of transistor Q1, the reference electrode earthing potential of the first transistor Q1.First switch module
5.1 also include second switch element, the first control signal S1 and the second control signal S2 from signal end V_out for basis
The switch of control first switch element Q1.Second switch element is transistor seconds Q2, and the coordination electrode of transistor seconds Q2 connects
The working electrode for meeting signal end V_out and transistor seconds Q2 is connected to the coordination electrode of the first transistor Q1 and with reference to electricity
Pole earthing potential.In this specific embodiment, first switch module 5.1 also includes the first clamper electricity for the first transistor Q1
Road, the first clamp circuit includes the 4th electric capacity C4 being connected between the coordination electrode of the first transistor Q1 and ground potential
And/or the first voltage-regulator diode D1 ', the voltage level of the coordination electrode for controlling the first transistor Q1.
Antihunt circuit of the invention 10 is also connected to Input voltage terminal including different from tie point 11 (referring to Fig. 5)
Second branch road 12 of Vin_DC, the second branch road 12 is including being one another in series as the 5th resistance R5 of divider resistance and the 6th resistance
The coordination electrode of R6, the first transistor Q1 is connected between the 5th resistance R5 and the 6th resistance R6.
According to the specific embodiment, after rectified device 9 (rectifier bridge) adjustment of sine voltage (Fig. 3 a) of Symmetrical
Unidirectional sinusoidal voltage (curve 1 ' in Fig. 6 a) is converted to, therefore in this embodiment, the voltage of detection Input voltage terminal Vin_DC
The magnitude of voltage V of the speed of the change first detection signal end V_Detector1 of degree in other wordsR1,R’=C1 (R1+R ') dv/dt.
With reference to Fig. 6 a, it is recognised that in the case of cutting light modulator 1 before the increase, in antihunt circuit of the invention 10
Cut in the pre-connection it is rectified during light modulator 1 after Input voltage terminal Vin_DC voltage oscillogram for unidirectional sinusoidal voltage (as scheme
Shown in curve 1 ' in 6a by taking 90 ° of cut angle as an example and Fig. 6 b curve 5 ').By above-mentioned formula VR1,R’=C1 (R1+R ')
After dv/dt conversions, it can be seen that the voltage oscillogram of first detection signal end V_Detector1 is such as the curve 3 ' in Fig. 6 a
It is shown.Therefore, using the first detection unit 4.1, the high potential signal on transistor seconds Q2 is acted so that second is brilliant
Body pipe Q2 is turned on, and due to transistor seconds Q2 conductings, the voltage of the coordination electrode of the first transistor Q1 is reduced to low potential (reference
The voltage oscillogram of the coordination electrode of the first transistor Q1 shown on Fig. 3 b, referring to the curve 7 ' in Fig. 6 c).Now, first
Transistor Q1 disconnects, therefore the electric current with the current waveform as shown in the curve 11 ' in Fig. 6 a flows through power resistor R '.If
In the case of light modulator 1 is cut before not connecing before, now, in the voltage waveform such as Fig. 6 b of Input voltage terminal Vin_DC shown in curve 4 ',
Now due to the voltage being applied on first resistor R1 and power resistor R ', i.e. on first detection signal end V_Detector1
Voltage is very low, because producing low-down dv/dt values.After so through Zenith tracking and partial pressure, the first detection unit 4.1
In 3rd resistor R3 on level it is relatively low, be not enough to open transistor seconds Q2, due to the first transistor Q1 be subject to first pincers
Position circuit (it is contemplated that by one of the 4th electric capacity C4 and the first voltage-regulator diode D1 ' or the two constitute) and by second
The control of resistance R5, R6 on branch road 12, therefore by choosing the resistance value of appropriate divider resistance R5, R6, can be first
Apply the high level voltage (referring to the curve 6 ' in Fig. 6 c) of stabilization on transistor Q1, therefore, the first transistor Q1 conductings, power
Resistance R ' is shorted.
In order to further increase the versatility of antihunt circuit of the invention 10, first detection module 4 includes and the first detection
Unit 4.1 produces the second of the first control signal S1 and the second control signal S2 that light modulator is cut after being connected to before identifying whether together
Detection unit 4.2.Second detection unit 4.2 includes the 5th electric capacity C5, the second diode D2, the 5th electric capacity C5 one end connection first
Detection signal end V_Detector1, the other end is respectively connecting to the positive terminal of the first diode D1 and bearing for the second diode D2
Extremely, the positive terminal of the second diode D2 is connected to the other end of 3rd resistor R3.Now, when cutting light modulator upon connection, after
Unidirectional sinusoidal voltage is converted to after the rectified adjustment of device 9 of sine voltage (Fig. 4 a) for cutting the Symmetrical of light modulator, is come from
The voltage signal of first detection signal end V_Detector1 is according to formula VR1,R’Generated after=C1 (R1+R ') dv/dt conversions
The level different with light modulator is preceding cut, now using the 5th electric capacity C5, the first diode D1, the second diode D2 will be from first
The voltage signal of detection signal end V_Detector1 is adjusted to high level, is accordingly controlled.Using the first detection unit 4.1
With the second detection unit 4.2, the high potential signal in transistor seconds Q2 is acted so that transistor seconds Q2 is turned on, by
In transistor seconds Q2 conductings, the grid voltage of the first transistor Q1 is reduced to low potential (the first crystalline substance shown on reference picture 4b
The voltage oscillogram of the coordination electrode of body pipe Q1).Now, the first transistor Q1 disconnects, therefore electric current flows through power resistor R '.
Fig. 5 is the antihunt circuit 10 of the second specific embodiment of the invention.In the most contents of Fig. 5 and Fig. 2 a
Content in first specific embodiment is identical.Unlike, Fig. 5 is further as a example by light modulator 1 is cut before being connected to before detecting whether
It is abundant with perfect first specific embodiment, such as in order to further control the coordination electrode of transistor seconds Q2 in Fig. 5
Voltage, first switch module 5.1 further comprises a second voltage-regulator diode D2 ', be connected to the control electricity of transistor seconds Q2
Between pole and ground potential, together with the 3rd electric capacity C3 being again connected between the coordination electrode of transistor seconds Q2 and ground potential
Constitute the second clamp circuit.Additionally, unlike, first switch module 5.1 also includes the 3rd voltage-regulator diode D3 ', the 3rd
One end of voltage-regulator diode D3 ' is connected to the coordination electrode of signal end V_out and other end connection transistor seconds Q2, to enter
The voltage of the coordination electrode of one step control transistor seconds Q2.For example, in the case where light modulator 1 is not connected to, being examined through overvoltage
Survey and after partial pressure, there is no enough voltage to turn on the 3rd voltage-regulator diode D3 ' and then turn on transistor seconds Q2.
Fig. 6 a be first, second specific embodiment of the invention antihunt circuit in pass through when cutting light modulator in the pre-connection
The voltage oscillogram of the Input voltage terminal after rectification, the voltage oscillogram at first detection signal end and now flow into damping element
Current waveform figure；Fig. 6 b be first, second specific embodiment of the invention antihunt circuit in it is rectified after input
Comparison of wave shape figure of the voltage of voltage end when light modulator is cut before not connected light modulator and connection；Fig. 6 c are of the invention
First, the control of the first transistor in the antihunt circuit of the second specific embodiment when light modulator is cut before not connected light modulator and connection
The comparison of wave shape figure of the voltage of electrode processed.With reference to the curve 4 ', 5 ' in the curve 1 ', 3 ', 11 ' and Fig. 6 b in Fig. 6 a and figure
Curve 6 ', 7 ' in 6c can be understood that the specific design of the first and second specific embodiment of the invention.
Fig. 7 is the antihunt circuit of the 3rd specific embodiment of the invention.Antihunt circuit 10 in Fig. 7 further to
Fig. 5, the antihunt circuit 10 in 6 is improved.In addition to it can recognize that and whether be before connected to light modulator 1, antihunt circuit 10
May recognize that whether light modulator 1 reaches predetermined measuring.It for example can be the nonconducting state of light modulator 1 to reach predetermined measuring.
And not up to it is predetermined measure can be light modulator 1 conducting state.Therefore, recognition control circuit of the invention produces identification
Whether be before connected to reach the predetermined light modulator 1 measured the 3rd control signal S3 or light modulator 1 be not up to it is predetermined measure the
Four control signal S4.Work of the switching function module according to the 3rd control signal S3 or the 4th control signal S4 control damping elements R '
Make state.Therefore, compared with the first specific embodiment of the invention and the second specific embodiment, 3rd embodiment increased accordingly
Detection module and switch module.In the specific embodiment, detection functional module also includes the second detection module 6, the second detection
Module 6 produces and the 3rd control signal S3 or light modulator 1 that reach the predetermined light modulator 1 measured are connected to before identifying whether are not up to
Predetermined the 4th control signal S4 for measuring.In this specific embodiment, the second detection module 6 is connected with Input voltage terminal Vin_DC
The 3rd branch road being made up of the 7th resistance R7 and the 8th resistance R8 for connecing, is exported between the 7th resistance R7 and the 8th resistance R8
Three control signal S3 or the 4th control signal S4.Accordingly, switching function module also includes second switch module 5.2, and this second
Switch module 5.2 includes third transistor Q3, the 4th transistor Q4, the 4th voltage-regulator diode D4 ' and the 9th resistance R9, the 3rd
The working electrode of transistor Q3 is connected and its reference electrode connection ground potential with the reference electrode of transistor seconds Q2, and the 4th is brilliant
The coordination electrode of body pipe Q4 is connected with the 4th voltage-regulator diode D4 ', and its working electrode is through the 9th resistance R9 and transistor seconds Q2
Working electrode connection and working electrode be connected with the coordination electrode of third transistor Q3.
Whether the specific embodiment detailed below detection light modulator 1 reaches the predetermined operation principle measured and worked
Journey.
The situation of light modulator was cut in the past for example, in the case where light modulator 1 is preceding connect, including the first diode D1, that
3rd resistor R3 in first detection unit 4.1 of the second resistance R2 and 3rd resistor R3 and the second electric capacity C2 of this series connection
On level it is higher, the 3rd voltage-regulator diode D3 ' conducting, in the coordination electrode of transistor seconds Q2 be in high level.When light modulator 1
Reach and make a reservation for measure, such as when light modulator 1 is not turned on, level is relatively low on the 8th resistance R8, and the 4th voltage-regulator diode D4 ' does not lead
Logical, the level of the working electrode of the 4th transistor Q4 that is to say that the level of the coordination electrode of third transistor Q3 is higher, and the 3rd is brilliant
Body pipe Q3 and transistor seconds Q2 is turned on, and the first transistor Q1 is turned off because its coordination electrode level is pulled low；Work as tune
When the conducting edge of light device 1 arrives, the level on the 8th resistance R8 is uprised, the 4th voltage-regulator diode D4 ' conductings, the 4th transistor
Q4 is turned on and third transistor Q3 is turned off, and the 4th electric capacity C4 can be turned on by the first transistor Q1 after the charging of certain hour, this
Damping element R ' still flows through electric current when section regular time can ensure that rising edge arrives, and plays certain damping action, prevents
The vibration of the electric current of light modulator 1 causes light flash.
Antihunt circuit of the invention can be mutually matched with the different types of converter in LED driver and use,
For example can match use with different topology structure such as reaction type converter and decompression transducer.
The preferred embodiments of the present invention are these are only, is not intended to limit the invention, for those skilled in the art
For member, the present invention can have various modifications and variations.All any modifications made within the spirit and principles in the present invention, etc.
With replacement, improvement etc., should be included within the scope of the present invention.
Label list
1 light modulator
S1-S4 the first, the second, the three, the 4th control signal
4 first detection modules
4.1 first detection units
4.2 second detection units
5.1 first switch modules
5.2 second switch modules
6 second detection modules
7 power converters
8 load LED
9 fairings
10 antihunt circuits
11 tie points
12 second branch roads
100 (LED) drivers
V_out signal ends
V_Detector1 first detection signals end
Vin_DC Input voltage terminals
R ' damping elements
The resistance of R1, R2 ... .R9 the first, the second ... .. the 9th
The electric capacity of C1, C2 ... .C5 the first, the second ... .. the 5th
The diode of D1, D2 the first, the second
D1 ', D2 ', D3 ', D4 ' the first, the second, the three, the 4th voltage-regulator diode
Q1, Q2, Q3, Q4 the first, the second, the three, the 4th transistor
Claims (22)
1. a kind of antihunt circuit (10) for driver (100), flashes for suppression, including：By the first electricity being one another in series
Hold (C1), the tie point (11) that first resistor (R1) is constituted and at least one damping element (R '), the tie point (11)
Connection Input voltage terminal (Vin_DC), it is characterised in that the antihunt circuit (10) also includes recognition control circuit, the identification
Control circuit includes detection functional module and switching function module, and the detection functional module collection sign comes from the input
At least one detection signal of the voltage change of voltage end (Vin_DC) has to produce be not connected with before the identification driver (100)
First control signal (S1) of light modulator (1) and preceding the second control signal (S2) for being connected to light modulator, the switching function module
The work shape of the damping element (R ') is controlled according to first control signal (S1) and according to the second control signal (S2)
State, the detection functional module includes first detection module (4), and the switching function module includes first switch module (5.1),
The first detection module (4) is from the first detection signal end (V_ between first electric capacity (C1) and first resistor (R1)
Detector1) collection first detection signal to be to produce first control signal (S1) or the second control signal (S2), and described the
One switch module (5.1) controls the damping element according to first control signal (S1), second control signal (S2)
The working condition of (R ').
2. antihunt circuit (10) according to claim 1, it is characterised in that the detection functional module collection sign comes from
In at least one detection signal of the voltage change of the Input voltage terminal (Vin_DC) being connect before producing the driver (100)
There are the 3rd control signal (S3) or the light modulator (1) that reach the predetermined light modulator (1) measured to be not up to described pre-
4th control signal (S4) of quantitative degree, the switching function module is according to the 3rd control signal (S3) and according to the 4th
Control signal (S4) controls the working condition of the damping element (R '), and the damping element (R ') is power resistor, described to open
Close functional module according to first control signal (S1) or the 3rd control signal (S3) by the damping element (R ') short circuit with
And the damping element (R ') is connected according to the second control signal (S2) or the 4th control signal (S4).
3. antihunt circuit (10) according to claim 2, it is characterised in that the damping element (R ') is inductance, described
Switching function module according to first control signal (S1) or the 3rd control signal (S3) connect the damping element (R ') with
And it is according to the second control signal (S2) or the 4th control signal (S4) that the damping element (R ') is short-circuit.
4. antihunt circuit (10) according to any one of claim 1 to 3, it is characterised in that the first detection module
(4) first control signal (S1) of light modulator (1) and the second control letter are cut before being connected to before identifying whether including generation
First detection unit (4.1) of number (S2).
5. antihunt circuit (10) according to claim 4, it is characterised in that first detection unit (4.1) is not before
Tune is cut in output as the low level signal of first control signal (S1) or before being preceding connected to when light modulator (1) is cut before being connected to
Exported as the high level signal of second control signal (S2) during light device (1).
6. antihunt circuit (10) according to claim 5, it is characterised in that first detection unit (4.1) includes
One diode (D1), the second resistance (R2) being one another in series and 3rd resistor (R3) and the second electric capacity (C2), the described 1st
The positive pole of pole pipe (D1) is connected to the first detection signal end (V_Detector1) and the negative pole of the first diode (D1) connects
Connect one end of the second resistance (R2), second electric capacity (C2) and the second resistance (R2) being one another in series, described
Three resistance (R3) are in parallel, are provided for believing the described first control between the second resistance (R2) and the 3rd resistor (R3)
Number (S1) or second control signal (S2) are input into the signal end (V_ of the control signal of the first switch module (5.1)
Out), the other end of the 3rd resistor (R3) is connected to the ground current potential.
7. antihunt circuit (10) according to Claims 2 or 3, it is characterised in that the first switch module (5.1) includes
First switch element.
8. antihunt circuit (10) according to claim 7, it is characterised in that the first switch element is the first transistor
(Q1), the damping element (R ') is connected between the working electrode of the first transistor (Q1) and reference electrode, and described
The reference electrode earthing potential of one transistor (Q1).
9. antihunt circuit (10) according to claim 8, it is characterised in that the first switch module (5.1) also includes
For the first clamp circuit of the first transistor (Q1), first clamp circuit includes being connected to first crystalline substance
The 4th electric capacity (C4) and/or the first voltage-regulator diode (D1 ') between the coordination electrode and ground potential of body pipe (Q1).
10. antihunt circuit (10) according to claim 8, it is characterised in that the first switch module (5.1) also includes
Second switch element, for according to first control signal (S1) from signal end (V_out) and the second control letter
Number (S2) controls the switch of the first switch element.
11. antihunt circuits (10) according to claim 10, it is characterised in that the second switch element is the second crystal
Pipe (Q2), coordination electrode the connection signal end (V_out) and the transistor seconds of the transistor seconds (Q2)
(Q2) working electrode is connected to the coordination electrode and reference electrode earthing potential of the first transistor (Q1).
12. antihunt circuits (10) according to claim 11, it is characterised in that the first switch module (5.1) is also wrapped
The second clamp circuit for the transistor seconds (Q2) is included, second clamp circuit includes being connected to described second
The 3rd electric capacity (C3) and/or the second voltage-regulator diode between the coordination electrode and the ground potential of transistor (Q2)
(D2’)。
13. antihunt circuits (10) according to claim 11, it is characterised in that the first switch module (5.1) is also wrapped
Include the 3rd voltage-regulator diode (D3 '), one end of the 3rd voltage-regulator diode (D3 ') be connected to the signal end (V_out) and
And the other end connects the coordination electrode of the transistor seconds (Q2).
14. antihunt circuits (10) according to claim 6, it is characterised in that the first switch module (5.1) includes
One switch element, the first switch element is the first transistor (Q1), and it is brilliant that the damping element (R ') is connected to described first
Between the working electrode and reference electrode of body pipe (Q1), the reference electrode earthing potential of the first transistor (Q1), the resistance
Buddhist nun's circuit (100) also includes being connected to second branch road (12) of the Input voltage terminal (Vin_DC), second branch road (12)
Including being one another in series as the 5th resistance (R5) of divider resistance and the 6th resistance (R6), the control of the first transistor (Q1)
Electrode processed is connected between the 5th resistance (R5) and the 6th resistance (R6).
15. antihunt circuits (10) according to claim 6, it is characterised in that the first detection module (4) including with institute
State the first detection unit (4.1) produce together identify whether before be connected to after cut first control signal (S1) of light modulator (1)
With second detection unit (4.2) of second control signal (S2).
16. antihunt circuits (10) according to claim 15, it is characterised in that second detection unit (4.2) includes
5th electric capacity (C5), the second diode (D2), described 5th electric capacity (C5) one end connect the first detection signal end (V_
Detector1), the other end is respectively connecting to the positive terminal and second diode of first diode (D1)
(D2) negative pole end, the positive terminal of second diode (D2) is connected to the other end of the 3rd resistor (R3).
17. antihunt circuits (10) according to claim 11, it is characterised in that the detection functional module also includes second
Detection module (6), second detection module (6) produces to be connected to before identifying whether and reaches the predetermined light modulator measured
(1) the 3rd control signal (S3) or the light modulator (1) is not up to predetermined the 4th control letter measured
Number (S4).
18. antihunt circuits (10) according to claim 17, it is characterised in that second detection module (6) is and institute
The 3rd branch road being made up of the 7th resistance (R7) and the 8th resistance (R8) of Input voltage terminal (Vin) connection is stated, from the described 7th
The 3rd control signal (S3), the 4th control signal (S4) are exported between resistance (R7) and the 8th resistance (R8).
19. antihunt circuits (10) according to claim 18, it is characterised in that the switching function module is opened including second
Module (5.2) is closed, the first switch module (5.1) is according to second control signal (S2) and the second switch module
(5.2) the work shape of the damping element (R ') is controlled according to the 3rd control signal (S3) or the 4th control signal (S4)
State.
20. antihunt circuits (10) according to claim 19, it is characterised in that the second switch module (5.2) includes
Third transistor (Q3), the 4th transistor (Q4), the 4th voltage-regulator diode (D4 ') and the 9th resistance (R9), the described 3rd is brilliant
The working electrode of body pipe (Q3) is connected and its reference electrode connection ground potential with the reference electrode of the transistor seconds (Q2),
The coordination electrode of the 4th transistor (Q4) is connected with the 4th voltage-regulator diode (D4 '), and its working electrode is through the described 9th electricity
Resistance (R9) be connected with the working electrode of the transistor seconds (Q2) and working electrode and the third transistor (Q3) control
Electrode connection processed.
A kind of 21. drivers (100), including the antihunt circuit (10) according to any one of claim 1-20.
A kind of 22. illuminators, including driver according to claim 21 (100).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110359481.1A CN103108435B (en) | 2011-11-14 | 2011-11-14 | Damping circuit, light-emitting diode (LED) driver and LED lighting system |
| PCT/EP2012/069022 WO2013072111A1 (en) | 2011-11-14 | 2012-09-27 | Damping circuit, led driver and led illuminating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110359481.1A CN103108435B (en) | 2011-11-14 | 2011-11-14 | Damping circuit, light-emitting diode (LED) driver and LED lighting system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103108435A CN103108435A (en) | 2013-05-15 |
| CN103108435B true CN103108435B (en) | 2017-05-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110359481.1A Expired - Fee Related CN103108435B (en) | 2011-11-14 | 2011-11-14 | Damping circuit, light-emitting diode (LED) driver and LED lighting system |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN103108435B (en) |
| WO (1) | WO2013072111A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2955978B1 (en) * | 2014-06-09 | 2023-08-09 | Silergy Semiconductor (Hong Kong) Limited | Lighting circuits, luminaries and methods compatible with phase-cut mains supplies |
| KR102257718B1 (en) * | 2014-10-01 | 2021-05-28 | 매그나칩 반도체 유한회사 | Circuit driving light emitting diode and light apparatus comprising the same |
| US10225908B2 (en) | 2015-02-25 | 2019-03-05 | Osram Sylvania Inc. | Active damping circuit |
| CN106714401A (en) * | 2015-08-14 | 2017-05-24 | 通用电气照明解决方案有限公司 | Damping circuit, LED driver and LED lighting system |
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| WO2011114250A1 (en) * | 2010-03-18 | 2011-09-22 | Koninklijke Philips Electronics N.V. | Method and apparatus for increasing dimming range of solid state lighting fixtures |
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| CN101164384A (en) * | 2005-04-22 | 2008-04-16 | 电灯专利信托有限公司 | Self-exciting step-up converter |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN103108435A (en) | 2013-05-15 |
| WO2013072111A1 (en) | 2013-05-23 |
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