CN206077767U - A kind of actinic LED drive circuit of new thyristor regulating - Google Patents
A kind of actinic LED drive circuit of new thyristor regulating Download PDFInfo
- Publication number
- CN206077767U CN206077767U CN201621077712.4U CN201621077712U CN206077767U CN 206077767 U CN206077767 U CN 206077767U CN 201621077712 U CN201621077712 U CN 201621077712U CN 206077767 U CN206077767 U CN 206077767U
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- China
- Prior art keywords
- drive circuit
- led
- thyristor regulating
- actinic
- power tube
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
Abstract
This utility model provides a kind of new thyristor regulating actinic LED drive circuit, including：Input ac voltage accesses the input of rectifier bridge after controllable silicon dimmer；One end of diode outfan respectively with rectifier bridge, the second drive circuit, one end of first resistor are connected, and the other end is connected with one end of LED load；One end other end respectively with LED load of current setting resistor, the second drive circuit is maintained to be connected, the other end is connected with the first drive circuit；The other end of the first biasing resistor is connected with the first drive circuit；First drive circuit modulates the output current of LED load；Second drive circuit provides controllable silicon dimmer and maintains electric current；It is mainly used in the fields such as D/C power, LED drivings and other systems realization based on linear work to output voltage or the regulatory function of electric current, can reliably improves LED linear constant-current circuit line regulation, greatly improve can overall efficiency.
Description
Technical field
This utility model is related to a kind of actinic LED drive circuit of thyristor regulating.
Background technology
In recent years, high-brightness LED illumination with specular removal, the long-life, high reliability and it is pollution-free the advantages of progressively take
For conventional light sources such as electric filament lamp, fluorescent lamps.In some applications, it may be desirable to the brightness of lamp light adjustable in some cases, so as to
Further energy-conservation and the comfortable illumination of offer.Controllable silicon dimmer illuminates application for a long time in the light modulation such as traditional electric filament lamp, and not
With wiring is changed, installation cost is relatively low, and the performance and specification of various brands controllable silicon dimmer are more or less the same.
Developing rapidly due to LED illumination, originally tens watts of electric filament lamp, directly can steeped with several watts of LED ball now
Lamp instead of, and can thus save the substantial amounts of energy.The dimming mode of electric filament lamp is much cut using controllable silicon dimmer
Mutually dim.Conventional incandescent is due to being a purely resistive load, it is possible to directly carry out cut tune to which with controllable silicon dimmer
Light.As conventional incandescent mostly is tens to several hectowatts, the design of controllable silicon dimmer is all designed as load.But
If directly dimmed to several watts of LED with this controllable silicon dimmer, as LED is not pure resistor load, so
The problems such as serious flicker can be brought.
According to the load characteristic of LED, it is desirable to have a kind of controllable constant-current source is controlling.High frequency switch power does current constant control
A kind of common method.But while performance is improved, cost is also greatly increased.
Compared with high frequency switch power, the advantage of linear low density scheme mainly has：1) input electrochemical capacitor is eliminated, is electrolysed
The electric capacity life-span is the bottleneck of power source life, eliminates electrochemical capacitor, and the driving power supply life-span just extends.2) circuit is operated in power frequency
Linear model, rather than high frequency mode is operated in, high-frequency inductor is eliminated, there is no EMI, eliminate EMC circuits.3)
The peripheral cells such as high-frequency inductor are eliminated, cost is reduce further.
Linear low density drive scheme, is an important selection that can not be ignored.It is mainly characterized by circuit simple, only needs little
Peripheral cell can just realize preferable constant-current dimming characteristic.The devices such as inductance, input capacitance are omitted compared to Switching Power Supply,
Suitable for the LED constant current driving power source system of the harsh compatible silicon controlled dimmer of non-isolated of volume, cost requirement.In cost declining
While, there is provided system reliability, the life-span of power supply is extended, and realizes higher PF.Simultaneously because line-down
In HF switch state, the circuit for solving the problems, such as EMI is also just eliminated.This has met the trend of LED drive power simplification, will
Increasingly received by market.
Compared to switch dimming scheme, linear arrangement device is few, small volume, low cost, so in MR16, GU10, or
Generally adopt in E12, E26 lamp holder small size application.In addition, linear arrangement light modulation compatibility is high, dimming scope is wider, light complexion changed
The features such as changing softer also begins to be widely used in ball bubble, light fixture etc..Linearity light adjusting scheme only problem is whole machine effect at present
Rate is generally relatively low, and this certainly will require to improve linear chip cooling condition, increase cost, and can not meet the rigid of some light efficiencies
Index.
The actinic LED drive circuit of common thyristor regulating, as shown in figure 1, being made up of drive circuit 1 and drive circuit 2.
Drive circuit 1 is used for the output current (Iout) for modulating LED load, due to the presence of feedback circuit, when input voltage (Vin) height
When LED load pressure drop (VLed), drive circuit 1 is started working, and then output current is remained
Now the power consumption (PM1) of metal-oxide-semiconductor M1 is：
Drive circuit 2 maintains electric current for providing to reverse-blocking tetrode thyristor, and when Vin is less than Vled, drive circuit 1 can not be defeated
Go out electric current, due to the presence of feedback circuit, drive circuit 2 is started working, then maintain electric current to remain：
When Vin is higher than Vled, drive circuit 1 is started working, due to the presence of feedback circuit, Vcs_1=Vcs_2=
Vref, now maintains electric current to be reduced to 0.It can thus be seen that when drive circuit 1 is unable to output current, drive circuit 2 is controllable
Silicon is provided and maintains electric current, prevents LED from flashing.When drive circuit 1 can with output current when, drive circuit 2 does not work, reduce system
Power consumption.
From the above analysis as can be seen that when Vin is higher, the power consumption of metal-oxide-semiconductor M1 can become when drive circuit 1 works
Obtain higher, so as to reduce the efficiency of whole system.
Utility model content
Problem to be solved in the utility model is to provide a kind of new thyristor regulating actinic LED drive circuit, energy
Enough improve the line regulation characteristic of LED linear constant-current circuit, the higher luminous flux of light fixture when realizing that input voltage is low is carried
The comfort level that high user uses.This utility model maintains current driving circuit and LED output currents to drive by adjusting controllable silicon
The method of attachment on galvanic electricity road, greatly improves can overall efficiency, so as to solve the above problems.
This utility model provides a kind of new thyristor regulating actinic LED drive circuit, including, controllable silicon dimmer,
Rectifier bridge, diode, LED load, the first drive circuit, the second drive circuit, maintenance current setting resistor and the first biased electrical
Resistance；Input ac voltage accesses the input of rectifier bridge after controllable silicon dimmer；One end of diode respectively with rectifier bridge
Outfan, the second drive circuit, first resistor one end be connected, the other end is connected with one end of LED load；Electric current is maintained to set
Determine one end of resistance other end respectively with LED load, the second drive circuit to be connected, the other end is connected with the first drive circuit；
The other end of the first biasing resistor is connected with the first drive circuit；First drive circuit modulates the output current of LED load；Second
Drive circuit provides controllable silicon dimmer and maintains electric current.
This utility model provides a kind of new thyristor regulating actinic LED drive circuit, can also have such spy
Levy：First drive circuit includes that first power tube, the first operational amplifier, output current set resistance and the second biased electrical
Resistance；The in-phase input end of the first operational amplifier accesses the first reference voltage, and inverting input passes through the second biasing resistor and the
3rd end of one power tube is connected；The first end of the first power tube is connected with the outfan of the first operational amplifier；Second end
It is connected with one end of current setting resistor is maintained；One end of output current setting resistance is connected with the 3rd end of the first power tube,
The other end is grounded.
This utility model provides a kind of new thyristor regulating actinic LED drive circuit, can also have such spy
Levy：The second end ground connection of the first power tube.
This utility model provides a kind of new thyristor regulating actinic LED drive circuit, can also have such spy
Levy：The inverting input of the first operational amplifier is also connected with one end of first resistor.
This utility model provides a kind of new thyristor regulating actinic LED drive circuit, can also have such spy
Levy：First power tube is field effect transistor, and first end is grid, and to drain, the 3rd end is source electrode at the second end.
This utility model provides a kind of new thyristor regulating actinic LED drive circuit, can also have such spy
Levy：Second drive circuit includes, the second power tube and the second operational amplifier；The in-phase input end of the second operational amplifier is accessed
Reference voltage, inverting input the 3rd end respectively with the second power tube, one end of LED load are connected；
The first end of the second power tube is connected with the outfan of the second operational amplifier；Second end and the outfan of rectifier bridge
It is connected；3rd end is connected with LED load.
This utility model provides a kind of new thyristor regulating actinic LED drive circuit, can also have such spy
Levy：Second power tube is field effect transistor, and first end is grid, and to drain, the 3rd end is source electrode at the second end.
This utility model provides a kind of new thyristor regulating actinic LED drive circuit, can also have such spy
Levy：Resistance of the resistance of the first biasing resistor more than the second biasing resistor.
This utility model provides a kind of new thyristor regulating actinic LED drive circuit, can also have such spy
Levy：Also include electric capacity, be connected in parallel on the two ends of LED load.
Description of the drawings
Fig. 1 is the actinic LED drive circuit of common thyristor regulating
Fig. 2 is the actinic LED drive circuit figure of new thyristor regulating.
Specific embodiment：
Below in conjunction with accompanying drawing, this utility model is described further.
Fig. 2 is the actinic LED drive circuit figure of new thyristor regulating.
As shown in Fig. 2 the actinic LED drive circuit of new thyristor regulating, including：It is input ac voltage ACin, controllable
Silicon dimmer, rectifier bridge, diode D, LED load, electric capacity C1, maintain current setting resistor Rcs_2, the first drive circuit, the
Two drive circuits and the first biasing resistor R1.
First drive circuit includes：First metal-oxide-semiconductor M1, the first operational amplifier OTA1, the second biasing resistor R2 and output
Current setting resistor Rcs_1.
Second drive circuit includes：Second metal-oxide-semiconductor M2, the second operational amplifier OTA2.
Rectifier bridge is made up of 4 diodes D1, D2, D3, D4.
Input ac voltage ACin's is input into the input that rectifier bridge is connect by controllable silicon dimmer all the way；Input is handed over
Another road input of stream voltage ACin connects another input of rectifier bridge.One outfan of rectifier bridge is with diode D just
Extremely it is connected；Another output head grounding.The negative pole of diode D is connected with the positive pole of LED load.Electric capacity C1 is connected in parallel on LED load
On.One end of current setting resistor Rcs_2 is maintained to be connected with the negative pole of LED load；Other end leakage respectively with the first metal-oxide-semiconductor M1
Pole, ground terminal are connected.
The in-phase input end of the first operational amplifier OTA1 is connected with the first reference voltage V ref1, and inverting input passes through
Second biasing resistor R2 is connected with the source electrode of the first metal-oxide-semiconductor M1, and outfan is connected with the grid of the first metal-oxide-semiconductor M1.Output current
One end of setting resistance Rcs_1 is connected with the source electrode of the first metal-oxide-semiconductor M1, other end ground connection.Second biasing resistor R2 one end and the
The source electrode of one metal-oxide-semiconductor M1 is connected, and the other end is connected with the inverting input of the first operational amplifier OTA1.
One end of first biasing resistor R1 is connected with the inverting input of the first operational amplifier OTA1, the other end and two poles
The positive pole of pipe D1 is connected.
Homophase input termination reference voltage V ref of the second operational amplifier OTA2, anti-phase input terminate the negative of LED load
Pole, the grid of output the second metal-oxide-semiconductor M2 of termination.The drain electrode of the second metal-oxide-semiconductor M2 connects the positive pole of diode D, and source electrode connects the second computing
The inverting input of amplifier OTA2.
The operation principle of the actinic LED drive circuit of new thyristor regulating：
First drive circuit is used for the output current (Iout) for modulating LED load, and the second drive circuit is for controllable silicon
Dimmer is provided and maintains electric current.Ground terminal of the ground terminal of the first drive circuit for rectifier bridge (D1～D4), the ground of the second drive circuit
Hold the drain terminal for metal-oxide-semiconductor M1 in the first drive circuit.First biasing resistor R1 and the second biasing resistor R2 are added into the first driving
In the feedback control loop of circuit.Wherein R1 is used for the size for perceiving Vin, and R2 is used for the value for setting Vcs_1.
When input voltage (Vin) is higher than LED load pressure drop (VLed), the first drive circuit is started working, output current
For：
When vin goes high, the electric current for flowing through resistance R1 can increase, so as to cause Vcs_1 to reduce；When Vin is reduced, flow through
The electric current of resistance R1 can reduce, so as to cause Vcs_1 to increase.Due to the presence of feedback circuit, Vinv and Vref is consistent, institute
So that following equation can be obtained
Can further obtain
As R1 resistances are much larger than R2 resistances, so
Output current is：
The power consumption (PM2) of the second metal-oxide-semiconductor M2 is：
Can draw from above-mentioned formula, in the first drive circuit works, output current (Iout) can be with the liter of Vin
It is high and reduce, so that the power consumption of metal-oxide-semiconductor M1 is substantially reduced in the first drive circuit works, so as to improve whole system
Efficiency.
When input voltage (Vin) is less than LED load pressure drop (VLed), the second drive circuit is started working, due to feedback
The presence in loop, Vcs_2 are consistent to the voltage difference and Vref of GND_2, and maintenance electric current is
Now the power consumption (PM2) of metal-oxide-semiconductor M2 is：
When input voltage (Vin) is higher than LED load pressure drop (Vled), after the first drive circuit is started working, Iout streams
Rcs_2 is crossed, it is higher than Vref to the voltage difference of GND_2 that this can cause Vcs_2.Due to the presence of feedback circuit, metal-oxide-semiconductor M2 can be closed
It is disconnected, maintain electric current Is to drop to 0, now the power consumption (PM2) of metal-oxide-semiconductor M2 drops to 0, for reducing the power of system.
Claims (9)
1. the actinic LED drive circuit of a kind of new thyristor regulating, it is characterised in that：
Including controllable silicon dimmer, rectifier bridge, diode, LED load, the first drive circuit, the second drive circuit, maintenance electricity
Stream setting resistance and the first biasing resistor；
Input ac voltage accesses the input of the rectifier bridge after the controllable silicon dimmer；
One end of diode outfan respectively with the rectifier bridge, the second drive circuit, first biasing resistor
One end is connected, and the other end is connected with one end of the LED load；
One end other end respectively with the LED load for maintaining current setting resistor, the second drive circuit are connected, another
End is connected with first drive circuit；
The other end of first biasing resistor is connected with first drive circuit；
First drive circuit modulates the output current of LED load；
Second drive circuit provides the controllable silicon dimmer and maintains electric current.
2. the actinic LED drive circuit of new thyristor regulating according to claim 1, it is characterised in that：
Wherein, the first drive circuit includes that the first power tube, the first operational amplifier, output current setting resistance and second are inclined
Put resistance；
The in-phase input end of first operational amplifier accesses the first reference voltage, and inverting input is biased by described second
Resistance is connected with the 3rd end of first power tube；
The first end of first power tube is connected with the outfan of first operational amplifier；Second end maintains electricity with described
One end of stream setting resistance is connected；
One end of the output current setting resistance is connected with the 3rd end of first power tube, other end ground connection.
3. the actinic LED drive circuit of new thyristor regulating according to claim 2, it is characterised in that：Described first
The second end ground connection of power tube.
4. the actinic LED drive circuit of new thyristor regulating according to claim 2, it is characterised in that：Described first
The inverting input of operational amplifier is also connected with one end of first biasing resistor.
5. the actinic LED drive circuit of new thyristor regulating according to claim 2, it is characterised in that：Described first
Power tube is field effect transistor, and first end is grid, and to drain, the 3rd end is source electrode at the second end.
6. the actinic LED drive circuit of new thyristor regulating according to claim 1, it is characterised in that：
Wherein, second drive circuit includes, the second power tube and the second operational amplifier；
The in-phase input end of second operational amplifier accesses reference voltage, inverting input respectively with second power tube
The 3rd end, LED load one end be connected；
The first end of second power tube is connected with the outfan of second operational amplifier；Second end and the rectifier bridge
Outfan be connected；3rd end is connected with the LED load.
7. the actinic LED drive circuit of new thyristor regulating according to claim 6, it is characterised in that：
Wherein, second power tube is field effect transistor, and the first end is grid, and second end is to drain, the described 3rd
Hold as source electrode.
8. the actinic LED drive circuit of new thyristor regulating according to claim 2, it is characterised in that：Described first
Resistance of the resistance of biasing resistor more than second biasing resistor.
9. the new actinic LED drive circuit of thyristor regulating according to any one in claim 1-8, its feature exist
In：Also include electric capacity, be connected in parallel on the two ends of the LED load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621077712.4U CN206077767U (en) | 2016-09-23 | 2016-09-23 | A kind of actinic LED drive circuit of new thyristor regulating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621077712.4U CN206077767U (en) | 2016-09-23 | 2016-09-23 | A kind of actinic LED drive circuit of new thyristor regulating |
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| Publication Number | Publication Date |
|---|---|
| CN206077767U true CN206077767U (en) | 2017-04-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621077712.4U Expired - Fee Related CN206077767U (en) | 2016-09-23 | 2016-09-23 | A kind of actinic LED drive circuit of new thyristor regulating |
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| Country | Link |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106954297A (en) * | 2016-09-23 | 2017-07-14 | 上海占空比电子科技有限公司 | A kind of actinic LED drive circuit of the thyristor regulating of novel efficient |
| CN108901098A (en) * | 2018-05-29 | 2018-11-27 | 上海源微电子科技有限公司 | A kind of linear LED drive circuit of replaceable operating mode |
| CN110972356A (en) * | 2019-12-23 | 2020-04-07 | 北京集创北方科技股份有限公司 | Drive control circuit and lighting drive circuit of light emitting diode |
-
2016
- 2016-09-23 CN CN201621077712.4U patent/CN206077767U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106954297A (en) * | 2016-09-23 | 2017-07-14 | 上海占空比电子科技有限公司 | A kind of actinic LED drive circuit of the thyristor regulating of novel efficient |
| CN108901098A (en) * | 2018-05-29 | 2018-11-27 | 上海源微电子科技有限公司 | A kind of linear LED drive circuit of replaceable operating mode |
| CN110972356A (en) * | 2019-12-23 | 2020-04-07 | 北京集创北方科技股份有限公司 | Drive control circuit and lighting drive circuit of light emitting diode |
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Legal Events
| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170405 Termination date: 20190923 |