CN109362153A - A kind of LED drive power with light modulation turn-off function - Google Patents
A kind of LED drive power with light modulation turn-off function Download PDFInfo
- Publication number
- CN109362153A CN109362153A CN201811331396.2A CN201811331396A CN109362153A CN 109362153 A CN109362153 A CN 109362153A CN 201811331396 A CN201811331396 A CN 201811331396A CN 109362153 A CN109362153 A CN 109362153A
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- Prior art keywords
- switch
- light modulation
- voltage
- turn
- drive power
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Links
- 238000001914 filtration Methods 0.000 claims abstract description 19
- 239000011324 bead Substances 0.000 description 22
- 229910052782 aluminium Inorganic materials 0.000 description 18
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 18
- 239000003990 capacitor Substances 0.000 description 18
- 239000000758 substrate Substances 0.000 description 17
- 230000000903 blocking effect Effects 0.000 description 10
- 238000010586 diagram Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 230000005611 electricity Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
Classifications
-
- 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]
-
- 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
-
- 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
Abstract
A kind of LED drive power with light modulation turn-off function, including current rectifying and wave filtering circuit, switch 1 and switch 2, DC/DC translation circuit, the positive voltage terminal and negative voltage side for the DC bus-bar voltage that the current rectifying and wave filtering circuit obtains pass through the switch 1 respectively and switch 2 is connected to the DC/DC translation circuit.There is forward conduction to turn off controllable, reverse-conducting characteristic for the switch 1 and switch 2, only when switch 1 and switch 2 are all in forward conduction state, DC voltage is applied to DC/DC translation circuit by switch 2 by the negative voltage side of switch 1, DC bus-bar voltage by the positive voltage terminal of DC bus-bar voltage；The light modulation cut-off signals that control circuit generates can simultaneously turn off switch 1 and switch 2.The preferred device of the switch 1 and switch 2 is power MOS pipe.
Description
Technical field
This application involves lighting control technique fields, drive more specifically to a kind of LED with light modulation turn-off function
Dynamic power supply.
Background technique
Currently, in order to meet the needs of secondary energy-saving, there is Dimmable LED driving with the extensive use of LED light source
Power supply, such as 0-10V light modulation, timing dimming Dimmable LED driving power, and there is Dimming-off (light modulation shutdown) function
The LED drive power of energy.
A kind of LED drive power light modulation of Chinese Patent Application No. 201520443345.4 switches off control circuit, comprising: whole
Current circuit module, the LED drive power unit that input terminal is connected with the output end of rectification circuit module, with LED drive power list
The connected dimming controlling module of member, further includes: auxiliary power module and on-off control circuit module；Auxiliary power module and on-off
The input terminal of control circuit module is connected, for being mentioned by on-off control circuit module to LED drive power unit main control chip
For accessory power supply；The control terminal of on-off control circuit module is connected with dimming controlling module, according to dimming controlling module output control
On-off between signal control auxiliary power module and LED drive power unit processed.Control module detects that dim signal does not exist
When preset range, the control signal of first state is exported, controls open circuit between auxiliary power module and LED drive power unit,
LED drive power unit stops working, and realizes the Dimming-off function of LED.
With the continuous improvement of LED lamp power, in order to reinforce radiating, power is generally adopted in 100 watts or more of LED lamp
Use aluminum substrate as circuit board, aluminum substrate is a kind of metal-based copper-clad plate with good heat radiating function, and general single sided board is by three
Layer structure is formed, and is circuit layer (copper foil), insulating layer and metal-based layer respectively；The metal-based layer of aluminum substrate is close to radiator
Together, the heat that LED lamp bead generates reaches radiator by the circuit layer, insulating layer, metal-based layer of aluminum substrate, and is transmitted to
In air.
In order to reinforce radiating, the insulating layer of aluminum substrate can be done as far as possible in the case where guaranteeing dielectric strength it is thin, in this way, aluminium base
The capacitor of usually several nF magnitudes is formed between the circuit layer and metal-based layer of plate.The metal-based layer of aluminum substrate and heat dissipation
Device is connected, and radiator can be connected to the earth, so, it is usually the electricity of several nF magnitudes between the circuit layer and the earth of aluminum substrate
Hold.
Referring to Fig. 1,101 be current rectifying and wave filtering circuit, and 102 be a BUCK converter, and 103 be the LED light of aluminum substrate material
Plate, input ac voltage obtains the DC voltage of fluctuation in capacitor C2 after rectifying and wave-filtering, after BUCK converter
It is supplied to the stable electric current of LED light bead string.
The electrical cable of circuit layer on aluminum substrate connects lamp bead, the gold of every section of electrical cable and aluminum substrate
Capacitor can all be formed between base by belonging to, and total capacitor is usually several nF magnitudes.
Fig. 2 is the waveform of the A point and B point at the both ends capacitor C2 relative to the voltage VA-PE and VB-PE of ground wire PE, VA-PE and
The distribution parameter of the waveform of VB-PE and device etc. is related, and has the feature that VA-PE is positive voltage always, and VB-PE is
Negative voltage.
In Fig. 1, the Q1 in BUCK converter is turned off, allows BUCK converter to stop working, the voltage on output capacitance C1
It can be reduced to 0V, still, VB-PE is negative voltage, and the voltage between B point and PE can be by the circuit layer and the earth (PE) of aluminum substrate
Between capacitor be applied in lamp bead, to light lamp bead；In fact, lamp bead on the market only needs the electricity of microampere magnitude now
Stream can be lighted.
That is the LED drive power of Fig. 1, even if main converter therein stops working, lamp bead is still lit.
LED drive power, which is generally divided into isolated power supply, (has high frequency transformer between input AC electricity and output DC voltage
Carry out electrical isolation) and non-isolated power supply, the LED drive power of Fig. 1 be non-isolated power supply, the above problem is than more prominent.
Summary of the invention
In view of this, the application provides a kind of LED drive power with light modulation turn-off function, for solving the prior art
In Dimmable LED driving power, can not really realize light modulation turn-off function the problem of.
To achieve the goals above, it is proposed that scheme it is as follows:
A kind of LED drive power with light modulation turn-off function, including current rectifying and wave filtering circuit, switch 1 and switch 2, DC/DC
Translation circuit, the positive voltage terminal and negative voltage side for the DC bus-bar voltage that the current rectifying and wave filtering circuit obtains pass through described open respectively
It closes 1 and is connected to the DC/DC translation circuit with switch 2.There is forward conduction shutdown controllably, reversely to lead for the switch 1 and switch 2
Logical characteristic, only when switch 1 and switch 2 are all in forward conduction state, the positive voltage terminal of DC bus-bar voltage is by switch
1, DC voltage is applied to DC/DC translation circuit by switch 2 by the negative voltage side of DC bus-bar voltage；What control circuit generated
Light modulation cut-off signals can simultaneously turn off switch 1 and switch 2.The preferred device of the switch 1 and switch 2 is power MOS pipe.
It can be seen from the above technical scheme that a kind of LED with light modulation turn-off function disclosed in the present application drives electricity
There is forward conduction to turn off controllable, reverse-conducting characteristic for source, switch 1 and switch 2, when carrying out light modulation shutdown, control
The light modulation cut-off signals that circuit generates can simultaneously turn off switch 1 and switch 2, that is, turn off the forward conduction function of switch 1 and switch 2
Can, the input voltage of DC/DC translation circuit is 0V, output voltage 0V；Also, VA-PE is positive voltage, but due to switch 1
Blocking effect, the positive voltage can not reach DC/DC translation circuit, likewise, VB-PE is negative voltage, but due to the blocking of switch 2
Effect, the negative voltage can not reach DC/DC translation circuit；So LED lamp panel is unable to get the voltage relative to the earth, lamp bead
It not can be lit.When LED drive power is in normal light modulation output, control circuit can make switch 1 and switch 2 all in
Forward conduction state, DC/DC translation circuit work normally, and export given electric current, lamp bead is lit.
As it can be seen that can reliably guarantee the light modulation turn-off function of LED drive power in technical solution disclosed in the present application.
Detailed description of the invention
The LED drive power that Fig. 1 show the prior art is applied to the schematic illustration of driving LED lamp panel.
Fig. 2 show the wave of the A point and B point at the both ends capacitor C2 in Fig. 1 relative to the voltage VA-PE and VB-PE of ground wire PE
Shape.
A kind of LED drive power with light modulation turn-off function that Fig. 3 show the offer of the embodiment of the present application one is applied
In the schematic illustration of driving LED lamp panel.
A kind of LED drive power with light modulation turn-off function that Fig. 4 show the offer of the embodiment of the present application one is applied
In the 1st particular circuit configurations schematic diagram of driving LED lamp panel.
A kind of LED drive power with light modulation turn-off function that Fig. 5 show the offer of the embodiment of the present application one is applied
In the 2nd particular circuit configurations schematic diagram of driving LED lamp panel.
A kind of LED drive power with light modulation turn-off function that Fig. 6 show the offer of the embodiment of the present application one is applied
In the 3rd particular circuit configurations schematic diagram of driving LED lamp panel.
A kind of LED drive power with light modulation turn-off function that Fig. 7 show the offer of the embodiment of the present application one is applied
In the 4th particular circuit configurations schematic diagram of driving LED lamp panel.
A kind of LED drive power with light modulation turn-off function that Fig. 8 show the offer of the embodiment of the present application two is applied
In the schematic illustration of driving LED lamp panel.
Specific embodiment
Below in conjunction with attached drawing, embodiments of the present invention is described in detail.
Embodiment one
A kind of LED drive power with light modulation turn-off function that Fig. 3 show the offer of the embodiment of the present application one is applied
In the schematic illustration of driving LED lamp panel.
In Fig. 3,101 be current rectifying and wave filtering circuit, and 102 be a DC/DC converter, and 103 be the LED light of aluminum substrate material
Plate, input ac voltage obtains the DC voltage of fluctuation in capacitor C2 after rectifying and wave-filtering, after DC/DC converter
It is supplied to the stable electric current of LED light bead string.S1 is switch 1, and S2 is switch 2, and S1 and S2 are power MOS pipes；When needing to carry out
When light modulation shutdown, the light modulation cut-off signals that control circuit generates can simultaneously turn off S1 and S2, the input voltage of DC/DC translation circuit
For 0V, output voltage 0V；Meanwhile the positive voltage terminal of capacitor C2 has S1 blocking, negative voltage side has S2 blocking, so, LED lamp panel
It is unable to get the voltage relative to the earth, lamp bead not can be lit.When LED drive power is in normal light modulation output, control
Circuit processed can make S1 and S2 all in forward conduction state, and DC/DC translation circuit works normally, and export given electric current, lamp
Integument is lighted.
A kind of LED drive power with light modulation turn-off function that Fig. 4 show the offer of the embodiment of the present application one is applied
In the 1st particular circuit configurations schematic diagram of driving LED lamp panel.
In Fig. 4,101 be current rectifying and wave filtering circuit, and 102 be a BUCK converter, and 103 be the LED lamp panel of aluminum substrate material, defeated
Enter alternating voltage and obtain the DC voltage of fluctuation in capacitor C2 after rectifying and wave-filtering, using being supplied to after BUCK converter
The stable electric current of LED light bead string.S1 is switch 1, and S2 is switch 2, and S1 and S2 are power MOS pipes；The work of circuit is former in Fig. 4
Reason is similar with Fig. 3, repeats no more.
A kind of LED drive power with light modulation turn-off function that Fig. 5 show the offer of the embodiment of the present application one is applied
In the 2nd particular circuit configurations schematic diagram of driving LED lamp panel.
In Fig. 5,101 be current rectifying and wave filtering circuit, and 102 be a BUCK converter, and 103 be the LED lamp panel of aluminum substrate material, defeated
Enter alternating voltage and obtain the DC voltage of fluctuation in capacitor C2 after rectifying and wave-filtering, using being supplied to after BUCK converter
The stable electric current of LED light bead string.S2 is switch 2, is power MOS pipe；Power switch Q1 in BUCK converter completes BUCK
In converter while the function of power switch, the function of S1 in Fig. 3 can also be undertaken.Specifically, when being dimmed
When shutdown, the light modulation cut-off signals that control circuit generates can simultaneously turn off Q1 and S2, and BUCK converter stops working, output voltage
For 0V, meanwhile, the positive voltage terminal of capacitor C2 has Q1 blocking, and negative voltage side has S2 blocking, so, LED lamp panel is unable to get relatively
In the voltage of the earth, lamp bead not can be lit；When LED drive power is in normal light modulation output, control circuit can make
S2 is in forward conduction state, and BUCK converter works normally, and exports given electric current, lamp bead is lit.
A kind of LED drive power with light modulation turn-off function that Fig. 6 show the offer of the embodiment of the present application one is applied
In the 3rd particular circuit configurations schematic diagram of driving LED lamp panel.
In Fig. 6,101 be current rectifying and wave filtering circuit, and the 102 BUCK converters underlying for a switching tube, 103 be aluminum substrate material
LED lamp panel, input ac voltage obtains the DC voltage of fluctuation in capacitor C2 after rectifying and wave-filtering, becomes using BUCK
The stable electric current of LED light bead string is supplied to after parallel operation.S1 is switch 1, and S2 is switch 2, and S1 and S2 are power MOS pipes；In Fig. 6
The working principle of circuit is similar with Fig. 3, repeats no more.
A kind of LED drive power with light modulation turn-off function that Fig. 7 show the offer of the embodiment of the present application one is applied
In the 4th particular circuit configurations schematic diagram of driving LED lamp panel.
In Fig. 7,101 be current rectifying and wave filtering circuit, and the 102 BUCK converters underlying for a switching tube, 103 be aluminum substrate material
LED lamp panel, input ac voltage obtains the DC voltage of fluctuation in capacitor C2 after rectifying and wave-filtering, becomes using BUCK
The stable electric current of LED light bead string is supplied to after parallel operation.S1 is switch 1, is power MOS pipe；Power switch in BUCK converter
Q1 while the function of power switch, can also undertake the function of S2 in Fig. 3 in completing BUCK converter.Specifically, when
When carrying out light modulation shutdown, the light modulation cut-off signals that control circuit generates can simultaneously turn off Q1 and S1, and BUCK converter stops
Work, output voltage 0V, meanwhile, the positive voltage terminal of capacitor C2 has S1 blocking, and negative voltage side has Q1 blocking, so, LED lamp panel
It is unable to get the voltage relative to the earth, lamp bead not can be lit；When LED drive power is in normal light modulation output, control
Circuit processed can make S1 be in forward conduction state, and BUCK converter works normally, and export given electric current, lamp bead is lit.
Embodiment two
A kind of LED drive power with light modulation turn-off function that Fig. 8 show the offer of the embodiment of the present application two is applied
In the schematic illustration of driving LED lamp panel.
In Fig. 8,101 be current rectifying and wave filtering circuit, and 102 be a DC/DC converter, and 103 be the LED light of aluminum substrate material
Plate, input ac voltage obtain DC bus-bar voltage after over commutation and pfc circuit, in capacitor C2, and DC bus-bar voltage is to have
The DC voltage of fluctuation, DC bus-bar voltage is using being supplied to the stable electric current of LED light bead string after DC/DC converter.PFC is defeated
It is positive voltage that the positive voltage terminal of capacitor C2, which is PE relative to the earth, out, and it is negative electricity that the negative voltage side of capacitor C2, which is PE relative to the earth,
Pressure.S1 is switch 1, and S2 is switch 2, and S1 and S2 are power MOS pipes；When carrying out light modulation shutdown, control circuit is generated
Light modulation cut-off signals can simultaneously turn off S1 and S2, the input voltage of DC/DC translation circuit is 0V, output voltage 0V；Meanwhile
The positive voltage terminal of PFC output capacitance C2 has S1 blocking, and negative voltage side has S2 blocking, so, LED lamp panel is unable to get relative to big
The voltage on ground, lamp bead not can be lit.When LED drive power is in normal light modulation output, control circuit can make S1 and
S2 is worked normally all in forward conduction state, DC/DC translation circuit, exports given electric current, lamp bead is lit.
In conclusion a kind of LED with light modulation turn-off function that embodiments herein one and embodiment two provide drives
Light modulation turn-off function may be implemented in dynamic power supply.
The foregoing is merely the preferred embodiment of the present invention, it is noted that for those of ordinary skill in the art and
Speech, under the premise of not departing from the principle of the present invention, can also make various deformation and improvement, this also should be considered as guarantor of the invention
Protect range.
Claims (3)
1. a kind of LED drive power with light modulation turn-off function, including current rectifying and wave filtering circuit, switch 1 and switch 2, DC/DC become
Change circuit, which is characterized in that the positive voltage terminal and negative voltage side for the DC bus-bar voltage that the current rectifying and wave filtering circuit obtains are distinguished
The DC/DC translation circuit is connected to by the switch 1 and switch 2.
2. a kind of LED drive power with light modulation turn-off function according to claim 1, which is characterized in that described to open
Closing 1 with switch 2 there is forward conduction to turn off controllable, reverse-conducting characteristic, only when switch 1 and switch 2 are all in positive guide
The positive voltage terminal of logical state, DC bus-bar voltage passes through switch 2 for direct current by the negative voltage side of switch 1, DC bus-bar voltage
Voltage is applied to DC/DC translation circuit；The light modulation cut-off signals that control circuit generates can simultaneously turn off switch 1 and switch 2.
3. a kind of LED drive power with light modulation turn-off function according to claim 1 or 2, which is characterized in that described
The preferred device of switch 1 and switch 2 is power MOS pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811331396.2A CN109362153A (en) | 2018-11-09 | 2018-11-09 | A kind of LED drive power with light modulation turn-off function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811331396.2A CN109362153A (en) | 2018-11-09 | 2018-11-09 | A kind of LED drive power with light modulation turn-off function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109362153A true CN109362153A (en) | 2019-02-19 |
Family
ID=65344643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811331396.2A Pending CN109362153A (en) | 2018-11-09 | 2018-11-09 | A kind of LED drive power with light modulation turn-off function |
Country Status (1)
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201336757Y (en) * | 2009-01-22 | 2009-10-28 | 陈咸丰 | Multi-way constant-current power supply used for high-power LED light source |
| KR20100132840A (en) * | 2009-06-10 | 2010-12-20 | 삼성전기주식회사 | Pwm dimming driving circuit for led |
| TW201349928A (en) * | 2012-05-25 | 2013-12-01 | Hep Tech Co Ltd | Light source supply module with power factor calibration |
| CN104470049A (en) * | 2013-09-25 | 2015-03-25 | 东芝照明技术株式会社 | Power Supply Device, Luminaire, and Lighting System |
| CN104811036A (en) * | 2014-01-28 | 2015-07-29 | 台达电子企业管理（上海）有限公司 | Multi-source power supply system and control method thereof |
| CN105529927A (en) * | 2014-10-16 | 2016-04-27 | 罗姆股份有限公司 | Switching power supply circuit |
| CN205883637U (en) * | 2016-07-04 | 2017-01-11 | 浙江英飞特光电有限公司 | LED light modulation circuit |
| JP2018041682A (en) * | 2016-09-09 | 2018-03-15 | 岩崎電気株式会社 | LED lighting circuit and LED lighting device |
| CN108770136A (en) * | 2018-08-17 | 2018-11-06 | 东莞邦达五金有限公司 | A kind of light modulation toning LED isolation constant-current driving power supplies |
| CN209994578U (en) * | 2018-11-09 | 2020-01-24 | 南京博德新能源技术有限公司 | LED driving power supply with dimming and turn-off functions |
-
2018
- 2018-11-09 CN CN201811331396.2A patent/CN109362153A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201336757Y (en) * | 2009-01-22 | 2009-10-28 | 陈咸丰 | Multi-way constant-current power supply used for high-power LED light source |
| KR20100132840A (en) * | 2009-06-10 | 2010-12-20 | 삼성전기주식회사 | Pwm dimming driving circuit for led |
| TW201349928A (en) * | 2012-05-25 | 2013-12-01 | Hep Tech Co Ltd | Light source supply module with power factor calibration |
| CN104470049A (en) * | 2013-09-25 | 2015-03-25 | 东芝照明技术株式会社 | Power Supply Device, Luminaire, and Lighting System |
| CN104811036A (en) * | 2014-01-28 | 2015-07-29 | 台达电子企业管理（上海）有限公司 | Multi-source power supply system and control method thereof |
| CN105529927A (en) * | 2014-10-16 | 2016-04-27 | 罗姆股份有限公司 | Switching power supply circuit |
| CN205883637U (en) * | 2016-07-04 | 2017-01-11 | 浙江英飞特光电有限公司 | LED light modulation circuit |
| JP2018041682A (en) * | 2016-09-09 | 2018-03-15 | 岩崎電気株式会社 | LED lighting circuit and LED lighting device |
| CN108770136A (en) * | 2018-08-17 | 2018-11-06 | 东莞邦达五金有限公司 | A kind of light modulation toning LED isolation constant-current driving power supplies |
| CN209994578U (en) * | 2018-11-09 | 2020-01-24 | 南京博德新能源技术有限公司 | LED driving power supply with dimming and turn-off functions |
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