CN107896406B - A kind of synchronous dimming driving circuit - Google Patents
A kind of synchronous dimming driving circuit Download PDFInfo
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- CN107896406B CN107896406B CN201711479547.4A CN201711479547A CN107896406B CN 107896406 B CN107896406 B CN 107896406B CN 201711479547 A CN201711479547 A CN 201711479547A CN 107896406 B CN107896406 B CN 107896406B
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- lamp group
- electrically connected
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- module
- constant flow
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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
Abstract
The invention discloses a kind of synchronous dimming driving circuits, including at least the first lamp group and the second lamp group and drive module, the first constant flow module, one end of first lamp group and external power supply are electrically connected, the other end of first lamp group is electrically connected with one end of the second lamp group, drive module respectively, the other end and drive module of second lamp group are electrically connected, and drive module and external power supply are electrically connected and detect the dimmer voltage that external power supply is input to the first lamp group；One end of first constant flow module and one end of the first lamp group are electrically connected；The other end of first constant flow module is electrically connected with one end of the other end of the first lamp group, the second lamp group respectively；Drive module and the first constant flow module cooperate to realize according to dimmer voltage size the two states for switching the first lamp group and the second lamp group series operation or the first lamp group and the second lamp group parallel running, the design improves dimmer voltage adjustable extent, each lamp group can be run simultaneously, and have preferable illumination effect.
Description
Technical field
The present invention relates to a kind of electronic fields, especially dimming driving circuit.
Background technique
A drive module can be used in traditional dimming driving circuit, also include at least the first lamp group and the second lamp group, first
One end of lamp group and external power supply are electrically connected, and the other end of the first lamp group is electric with one end of the second lamp group, drive module respectively
Property connection, the other end of the second lamp group and drive module be electrically connected, and drive module and external power supply electric connection and detects
External power supply is input to the dimmer voltage of the first lamp group, and drive module can control the port of the first lamp group of connection, second respectively
The port of lamp group is connected, thus drive module can be controlled according to dimmer voltage the first lamp group conducting running or the first lamp group,
The series connection conducting running of second lamp group, however during dimmer voltage variation, the first lamp in the lower situation of dimmer voltage
Group is first bright, and during dimmer voltage is raised, brightness is got higher, and when eventually exceeding threshold value, drive module controls the first lamp group again
It connects with the second lamp group, this structure not can control the first lamp group and the synchronous operation of the second lamp group, can only be first by a lamp group point
It is bright, then other lamp groups are gradually lighted during voltage is raised, so that illumination effect is bad.
Summary of the invention
In order to solve the above technical problems, the object of the present invention is to provide the tune that one kind can be such that several lamp groups run simultaneously
Light drive circuit.
The technical solution adopted by the present invention is that:
A kind of synchronous dimming driving circuit, includes at least the first lamp group and the second lamp group and drive module, and described first
One end of lamp group and external power supply are electrically connected, and the other end and drive module of first lamp group are electrically connected, and described second
The other end and drive module of lamp group are electrically connected, and drive module and external power supply are electrically connected and detect external power supply input
To the dimmer voltage of the first lamp group；
It further include the first constant flow module, one end electric connection of one end of the first constant flow module and the first lamp group；First is permanent
The other end of flow module is electrically connected with the other end of the first lamp group, one end of the second lamp group, drive module respectively, the first constant current
Module can realize cut-off or conducting according to the size of dimmer voltage；
Drive module and the first constant flow module cooperate and can switch the first lamp according to dimmer voltage size to realize
The state of group and the second lamp group series operation or the first lamp group and the second lamp group parallel running.
The drive module includes test side, control unit, first switch corresponding with the first lamp group and the second lamp group pair
The second switch answered；
Test side and external power supply are electrically connected to detect dimmer voltage；
One end of first switch respectively with the other end of the first lamp group, the other end of the first constant flow module, the second lamp group
One end is electrically connected, the other end ground connection of first switch；
The other end of one end of second switch and the second lamp group is electrically connected, the other end ground connection of second switch；
Described control unit is electrically connected respectively with test side, first switch, second switch to be distinguished according to dimmer voltage
Control first switch, second switch cut-off or conducting.
First constant flow module includes the first constant current chip, diode D2 and reference resistance R6；
The anode of first lamp group is electrically connected with one end of the first constant current chip, external power supply respectively；
The cathode of first lamp group is electrically connected with one end of the anode of diode D2, first switch respectively；
The cathode of diode D2 is electrically connected with one end of the other end of the first constant current chip, reference resistance R6 respectively；
The other end of reference resistance R6 and the anode of the second lamp group are electrically connected；
The cathode of second lamp group and one end of second switch are electrically connected.
Further include the second constant flow module and third lamp group, the drive module further include controlled by control unit cut-off or
The third switch of person's conducting, one end of second constant flow module and one end of the second lamp group are electrically connected, second constant current
The other end of module is electrically connected with one end of the other end of the second lamp group, one end of third lamp group, second switch respectively, third
One end of the other end and the third switch of lamp group is electrically connected, and the other end ground connection of third switch, the second constant flow module being capable of root
Cut-off or conducting are realized according to the size of dimmer voltage.
Second constant flow module includes the second constant current chip, diode D3 and reference resistance R8；
The anode of second lamp group is electrically connected with one end of the second constant current chip；
The cathode of second lamp group is electrically connected with one end of the anode of diode D3, second switch respectively；
The cathode of diode D3 is electrically connected with one end of the other end of the second constant current chip, reference resistance R8 respectively；
The other end of reference resistance R8 and the anode of third lamp group are electrically connected；
One end of cathode and the third switch of third lamp group is electrically connected.
Further include rectification module, the rectification module and external power supply be electrically connected be after rectification is handled the first lamp group,
The power supply of second lamp group.
It further include voltage regulating module, which is electrically connected respectively to export light modulation electricity with rectification module, the first lamp group
Pressure.
Beneficial effects of the present invention:
The present invention synchronizes dimming driving circuit, in the lower situation of dimmer voltage, the conducting of the first constant flow module, and the first lamp
Group is in parallel with the string that the first constant flow module, the second lamp group form, and in the case where drive module controls, electric current is from the first lamp group stream all the way
It crosses, another way electric current is flowed through from the first constant flow module, the second lamp group, and the first lamp group, the second lamp group are lighted, and in light modulation electricity
During pressure incrementally increases, the brightness of the first lamp group, the second lamp group is adjusted, increases to threshold value, the first constant current in dimmer voltage
Module cut-off, the first lamp group, the series connection of the second lamp group, so that the electric current flowed through is unlikely to excessive, so that improving dimmer voltage can
Range is adjusted, each lamp group can be run simultaneously, and have preferable illumination effect.
Detailed description of the invention
A specific embodiment of the invention is described further with reference to the accompanying drawing.
Fig. 1 is the circuit diagram of dimming driving circuit of the present invention.
Specific embodiment
As shown in Figure 1, dimming driving circuit of the present invention, includes at least the first lamp group 1 and the second lamp group 2 and drive module
5, it can also include herein third lamp group 3, the 4th lamp group 4, even more, the first lamp group 1 herein can have a LED chip
It constitutes, can also be sequentially connected in series by several LED chips, one end of the first lamp group 1 and external power supply are electrically connected, the first lamp
The other end and drive module 5 of group 1 are electrically connected, and the other end and drive module 5 of second lamp group 2 are electrically connected, driving
Module 5 and external power supply are electrically connected and detect the dimmer voltage that external power supply is input to the first lamp group 1；
The design further includes the first constant flow module 11, one end electrical property of one end of the first constant flow module 11 and the first lamp group 1
Connection；The other end of first constant flow module 11 respectively with the other end of the first lamp group 1, one end of the second lamp group 2, drive module 5
It is electrically connected, the first constant flow module 11 can realize cut-off or conducting according to the size of dimmer voltage；
Drive module 5 and the first constant flow module 11 cooperate and can switch first according to dimmer voltage size to realize
The state of lamp group 1 and 2 series operation of the second lamp group or 2 parallel running of the first lamp group 1 and the second lamp group.
Wherein, the design may include rectification module 6, which is electrically connected with external power supply to handle in rectification
It is afterwards the first lamp group 1, the power supply of the second lamp group 2, while further includes voltage regulating module 7, voltage regulating module 7 herein can be conventional tune
Compress switch power supply, which is electrically connected with rectification module 6, the first lamp group 1 respectively, and user can be set by voltage regulating module 7
Surely corresponding dimmer voltage is exported.
Further, drive module 5 include test side 51, control unit 52, first switch 53 corresponding with the first lamp group 1,
Second switch 54 corresponding with the second lamp group 2；
Test side 51 and external power supply are electrically connected to detect dimmer voltage；
One end of first switch 53 respectively with the other end of the first lamp group 1, one end of the second lamp group 2, the first constant flow module
11 other end is electrically connected, the other end ground connection of first switch 53；
The other end of one end of second switch 54 and the second lamp group 1 is electrically connected, the other end ground connection of second switch 54；
Described control unit 52 is electrically connected with test side 51, first switch 53, second switch 54 according to light modulation respectively
Voltage controls first switch 53, the cut-off of second switch 54 or conducting respectively.
First constant flow module 11 includes the first constant current chip 111, diode D2 and reference resistance R6；
The anode of first lamp group 1 is electrically connected with one end of the first constant current chip 111, external power supply respectively；
The cathode of first lamp group 1 is electrically connected with one end of the anode of diode D2, first switch 53 respectively；
The cathode of diode D2 is electrically connected with one end of the other end of the first constant current chip 111, reference resistance R6 respectively；
The other end of reference resistance R6 and the anode of the second lamp group 2 are electrically connected；
The cathode of second lamp group 2 and one end of second switch 54 are electrically connected.
Herein, drive module 5 can be ES105 constant current chip, and the voltage swing of external output is detected in test side 51, accordingly
Control unit 52 be made of several comparators, and then according to voltage swing control first switch 53, second switch 54 be connected,
So that 2 string of the second lamp group conducting of 1 string of the first lamp group of connection first switch 53, connection second switch 53, simultaneously
Dimmer voltage acts in the first lamp group 1 and the second lamp group 2, when dimmer voltage rises to certain threshold value, so that passing through first
The electric current of constant current chip 111 increases, so that the electric current for flowing through reference resistance R6 increases, the detection of the first constant current chip 111 is with reference to electricity
The resistance end R6 voltage is increased to certain value, and the cut-off of the first constant current chip 111, when dimmer voltage is lower, first switch 53, second are opened
The 54, first constant current chip 111 is closed to be both turned on, due to the effect of diode D2, so that the first lamp group 1 and the first constant current chip 111,
The string that second lamp group 2 is constituted is in parallel, rises to certain value in dimmer voltage, first switch 53 turns off, the first constant current chip 111
Cut-off, with the second lamp group 2 at connecting, electric current flows after flowing through the first lamp group 1, the second lamp group 2 from second switch 54 the first lamp group 1
Out.
In the lower situation of dimmer voltage, the conducting of the first constant flow module 11, the first lamp group 1 and the first constant flow module 11,
The string of second lamp group 2 composition is in parallel, and under the control of drive module 5, electric current is flowed through from the first lamp group 1 all the way, another way electric current
It is flowed through from the first constant flow module 11, the second lamp group 2, the first lamp group 1, the second lamp group 2 are lighted, and are gradually increased in dimmer voltage
In big process, the brightness of the first lamp group 1, the second lamp group 2 is adjusted, increases to threshold value, the first constant flow module 11 in dimmer voltage
Cut-off, the first lamp group 1, the series connection of the second lamp group 2, so that the electric current flowed through is unlikely to excessive, so that it is adjustable to improve dimmer voltage
Range, each lamp group can be run simultaneously, and have preferable illumination effect, while the first lamp group 1 and the second lamp group 2 can be not
With the lamp group of colour temperature, to can also be achieved toning function.
Further, the design further includes the second constant flow module 21 and third lamp group 3, and the drive module 5 further includes
The third switch 55 of cut-off or conducting, one end of second constant flow module 21 and the second lamp group 2 are controlled by control unit 52
One end be electrically connected, the other end of second constant flow module 21 respectively with the other end of the second lamp group 2, third lamp group 3
One end electric connection of one end, second switch 54, the other end of third lamp group 3 and one end of third switch 55 are electrically connected, the
The other end of three switches 55 is grounded, and the second constant flow module 21 can realize cut-off or conducting according to the size of dimmer voltage.
Second constant flow module 21 includes the second constant current chip 211, diode D3 and reference resistance R8；
The anode of second lamp group 2 is electrically connected with one end of the second constant current chip 211；
The cathode of second lamp group 2 is electrically connected with one end of the anode of diode D3, second switch 54 respectively；
The cathode of diode D3 is electrically connected with one end of the other end of the second constant current chip 211, reference resistance R8 respectively；
The other end of reference resistance R8 and the anode of third lamp group 3 are electrically connected；
The cathode of third lamp group 3 and one end of third switch 55 are electrically connected.
The above description is only a preferred embodiment of the present invention, and the present invention is not limited to above embodiment, as long as with
Essentially identical means realize that the technical solution of the object of the invention belongs within protection scope of the present invention.
Claims (6)
1. a kind of synchronous dimming driving circuit, it is characterised in that: the first lamp group and the second lamp group and drive module are included at least,
One end of first lamp group and external power supply are electrically connected, and the other end and drive module of first lamp group are electrically connected,
The other end and drive module of second lamp group are electrically connected, and drive module and external power supply are electrically connected and detect outside
Dimmer voltage of the power input to the first lamp group；
It further include the first constant flow module, one end electric connection of one end of the first constant flow module and the first lamp group；First constant current mould
The other end of block is electrically connected with the other end of the first lamp group, one end of the second lamp group, drive module respectively, the first constant flow module
Cut-off or conducting can be realized according to the size of dimmer voltage；
Drive module and the first constant flow module cooperate with realize can be switched according to dimmer voltage size the first lamp group and
The state of second lamp group series operation or the first lamp group and the second lamp group parallel running；
The drive module includes test side, control unit and the corresponding first switch of the first lamp group, corresponding with the second lamp group
Second switch；
Test side and external power supply are electrically connected to detect dimmer voltage；
One end of first switch respectively with the other end of the first lamp group, the other end of the first constant flow module, the second lamp group one end
It is electrically connected, the other end ground connection of first switch；
The other end of one end of second switch and the second lamp group is electrically connected, the other end ground connection of second switch；
Described control unit is electrically connected respectively with test side, first switch, second switch to be controlled respectively according to dimmer voltage
First switch, second switch cut-off or conducting.
2. a kind of synchronous dimming driving circuit according to claim 1, it is characterised in that: first constant flow module includes
First constant current chip, diode D2 and reference resistance R6；
The anode of first lamp group is electrically connected with one end of the first constant current chip, external power supply respectively；
The cathode of first lamp group is electrically connected with one end of the anode of diode D2, first switch respectively；The cathode of diode D2
It is electrically connected respectively with one end of the other end of the first constant current chip, reference resistance R6；
The other end of reference resistance R6 and the anode of the second lamp group are electrically connected；
The cathode of second lamp group and one end of second switch are electrically connected.
3. a kind of synchronous dimming driving circuit according to claim 1, it is characterised in that: further include the second constant flow module with
And third lamp group, the drive module further include the third switch that cut-off or conducting are controlled by control unit, described second is permanent
One end of one end of flow module and the second lamp group is electrically connected, second constant flow module it is other hold respectively with the second lamp group
One end electric connection of the other end, one end of third lamp group, second switch, one end of the other end and the third switch of third lamp group
Be electrically connected, third switch the other end ground connection, the second constant flow module can according to the size of dimmer voltage realize cut-off or
Conducting.
4. a kind of synchronous dimming driving circuit according to claim 3, it is characterised in that: second constant flow module includes
Second constant current chip, diode D3 and reference resistance R8；
The anode of second lamp group is electrically connected with one end of the second constant current chip；
The cathode of second lamp group is electrically connected with one end of the anode of diode D3, second switch respectively；The cathode of diode D3
It is electrically connected respectively with one end of the other end of the second constant current chip, reference resistance R8；
The other end of reference resistance R8 and the anode of third lamp group are electrically connected；
One end of cathode and the third switch of third lamp group is electrically connected.
5. a kind of synchronous dimming driving circuit according to claim 1, it is characterised in that: further include rectification module, this is whole
Flow module and external power supply are electrically connected to be the first lamp group, the power supply of the second lamp group after rectification is handled.
6. a kind of synchronous dimming driving circuit according to claim 1, it is characterised in that: it further include voltage regulating module, the tune
Die block is electrically connected respectively with rectification module, the first lamp group to export dimmer voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711479547.4A CN107896406B (en) | 2017-12-29 | 2017-12-29 | A kind of synchronous dimming driving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711479547.4A CN107896406B (en) | 2017-12-29 | 2017-12-29 | A kind of synchronous dimming driving circuit |
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| CN107896406A CN107896406A (en) | 2018-04-10 |
| CN107896406B true CN107896406B (en) | 2019-08-16 |
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| CN201711479547.4A Active CN107896406B (en) | 2017-12-29 | 2017-12-29 | A kind of synchronous dimming driving circuit |
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Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW201105172A (en) * | 2009-07-30 | 2011-02-01 | Advanced Connectek Inc | Light emitting diode (LED) device and driving method thereof |
| CN104780646B (en) * | 2014-01-15 | 2018-06-05 | 四川新力光源股份有限公司 | A kind of LED drive circuit for supporting controllable silicon light modulation |
| CN107046746B (en) * | 2016-02-06 | 2019-03-12 | 陕西亚成微电子股份有限公司 | A kind of LED light adjusting control circuit |
| CN107046747B (en) * | 2016-02-06 | 2019-08-20 | 陕西亚成微电子股份有限公司 | A kind of LED light adjusting control circuit |
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