CN203968437U - A kind of Dimmable LED driving power and corresponding LED light fixture - Google Patents
A kind of Dimmable LED driving power and corresponding LED light fixture Download PDFInfo
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- CN203968437U CN203968437U CN201420109826.7U CN201420109826U CN203968437U CN 203968437 U CN203968437 U CN 203968437U CN 201420109826 U CN201420109826 U CN 201420109826U CN 203968437 U CN203968437 U CN 203968437U
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Abstract
The utility model proposes a kind of Dimmable LED driving power, it is characterized in that: be provided with one with the first pin of LED load anodic bonding, and some the second pins that are connected with LED load negative electrode, described the second pin carries out discontinuous control to the LED load circuit of its connection.Compared with prior art, the many-sided advantages such as flicker that have that circuit structure is simplified, encapsulation volume is little, the output of long service life, power supply is more stable, can effectively avoid LED light source, can realize the multistage or stepless dimming of LED light fixture to the utility model.
Description
Technical field
The utility model relates to LED light regulating technology field, is specifically related to a kind of Dimmable LED driving power and corresponding LED light fixture.
Background technology
At present, LED (light-emitting diode), due to incomparable superiority of conventional light source such as its light efficiency is good, long service life, energy-conserving and environment-protective, is widely used in lighting field.Wherein, the application of the technology of outbalance is the light modulation of LED with the direction of research.On market, most LED driving power all has the function of LED light modulation, is generally that the light output that realizes LED by changing size of current or pwm pulse regulates.Yet there is comparatively significantly limitation in existing electric current regulative mode: one, the scope of curent change must just be enough to realize the adjusting of larger brightness range enough greatly, and this is no matter to driving power or LED unit all has higher performance requirement; Its two, when light modulation LED luminescence unit easily occur flicker, affect illuminating effect; They are three years old, LED driving power needs high-voltage electrolytic capacitor to maintain LED normally to work, and LED drive circuit itself has larger temperature rise, contracting intelligence is greatly short useful life under hot environment for electrochemical capacitor, then makes the useful life of LED driving power far below LED luminescence unit.
Utility model content
For the problems referred to above, the utility model proposes a kind of Dimmable LED driving power, the many-sided advantages such as flicker that have that circuit structure is simplified, encapsulation volume is little, the output of long service life, power supply is more stable, can effectively avoid LED light source, can realize the multistage or stepless dimming of LED light fixture.Its technical scheme is as follows:
A Dimmable LED driving power, be provided with one with the first pin of LED load anodic bonding, and some the second pins being connected with LED load negative electrode, described the second pin carries out discontinuous control to the LED load circuit of its connection.
Described Dimmable LED driving power also comprises
One rectifier bridge, its output anode is connected with described the first pin, for direct voltage output is provided;
One a reference source, its output is connected with described the first pin, for reference pulse modulator output voltage;
One control unit, the first control end that it is provided with control signal input, is connected with switch element, and the second control end being connected with a reference source; And
Some switch elements, its be provided with the first end that is connected with described the second pin, with the second end that described rectifier bridge output cathode is connected, by described control unit, control its conducting or cut-off.
Described control signal input, for obtaining effective level signal, described control unit controls according to this level signal the reference pulse that a reference source produces duty ratio corresponding.
The technical solution of the utility model further comprises:
Described control unit carries out discontinuous control according to the work phase place of each switch element, successively each LED load circuit of conducting.
Further, described switch element comprises a constant-current circuit, and described constant-current circuit is implemented feedback to the electric current of the LED load of flowing through.
Further, between the output cathode of described rectifier bridge and switch element, be serially connected with a resistance.
Further, the 3rd pin is drawn at the node place between above-mentioned resistance and switch element.
As preferred version, described rectifier bridge comprises the first diode, the second diode, the 3rd diode and the 4th diode, and described the first diode is connected with the second diode, and described the 3rd diode is connected with the 4th diode; The negative electrode of described the second diode, the 4th diode connects the output anode of rectifier bridge, the output cathode of the anodic bonding rectifier bridge of described the first diode, the 3rd diode.
As preferred version, described LED load is some LED lamp groups that are connected in series, and in each LED lamp group, at least comprises a LED luminescence unit; Described the first pin connects the anode of head end LED lamp group, and described the second pin is connected to the negative electrode of node and tail end LED lamp group between each LED lamp group of string.
As preferred version, described significant level signal results from touch-control or tunes switch.
Compared with prior art, its advantage is the utility model: one, the power supply of inside circuit and power supply output directly obtain direct voltage via bridge rectifier, do not need through electrochemical capacitor filtering, and the whole service life of LED power supply is got a promotion.Its two, inside establish constant-current circuit the electric current of the LED load of flowing through fed back, make the output of LED power supply more stable, avoid the flicker of LED light source; Its three, be applicable to point contact type or rotary adjustment type and control, can realize the multistage or stepless dimming of LED light fixture; Its four, circuit structure simplifies, good, makes encapsulation volume less, application surface is wider.
Accompanying drawing explanation
Fig. 1 is the composition schematic diagram of LED driving power.
Fig. 2 is that the inside of Fig. 1 chips U2 forms schematic diagram.
Fig. 3 is that the inside of Fig. 1 chips U1 forms schematic diagram.
Fig. 4 is that switch element forms schematic diagram.
Fig. 5 is the connected mode schematic diagram of LED light fixture.
Fig. 6 is that LED electric power output voltage contrasts figure with the work phase place of LED lamp group.
Embodiment
As follows by reference to the accompanying drawings, the application's scheme is further described:
As Figure 1-5, a kind of Dimmable LED driving power, be provided with one with the first pin V of LED load anodic bonding, and the second pin A0, A1, A2, A3, the A4 that are connected with LED load negative electrode, described the second pin A0, A1, A2, A3, A4 carry out discontinuous control to the LED load circuit of its connection.
Described Dimmable LED driving power comprises
One rectifier bridge U1, its output anode is connected with described the first pin V, for direct voltage output is provided;
One a reference source G, its output is connected with described the first pin V, for reference pulse modulator output voltage;
One control unit MCU, the first control end that it is provided with control signal input CRL, is connected with switch element, and the second control end being connected with a reference source; And
Switch element T0, T1, T2, T3, T4, it is provided with the first end being connected with described the second pin A0, A1, A2, A3, A4, the second end being connected with described rectifier bridge U1 output cathode, by described control unit, controls its conducting of MCU or cut-off.
Described control signal input CRL, for obtaining effective level signal, described control unit MCU controls according to this level signal the reference pulse that a reference source G produces duty ratio corresponding.
Described control unit MCU carries out discontinuous control according to the work phase place of each switch element, successively each LED load circuit of conducting.
Described switch element comprises a transistor switch 1 and the constant-current circuit 2 that series winding connects in succession, and the controlled and described control unit MCU of described transistor switch is connected, and controls its conducting of MCU or cut-off by described control unit; The flow through electric current of LED load of 2 pairs of described constant-current circuits is implemented feedback.
Between the output cathode of described rectifier bridge U1 and switch element, be serially connected with a resistance R.
The 3rd pin ADJ is drawn at node place between above-mentioned resistance R and switch element.
Described rectifier bridge comprises the first diode D1, the second diode D2, the 3rd diode D3 and the 4th diode D4, and described the first diode D1 connects with the second diode D2, and described the 3rd diode D3 connects with the 4th diode D4; The negative electrode of described the second diode D2, the 4th diode D4 connects the output anode of rectifier bridge, the output cathode of the anodic bonding rectifier bridge of described the first diode D1, the 3rd diode D3.
Described LED load is some LED lamp group L1, L2, L3, L4 that are connected in series, and in each LED lamp group, at least comprises a LED luminescence unit; Described the first pin V connects the anode of LED lamp group L1, and described the second pin A0, A1, A2, A3 are connected in successively node between LED lamp group L1, L2, L3, L4 and connect, and described the second pin A4 is connected with the negative electrode of LED lamp group L4.
Described significant level signal results from touch-control or tunes K switch.
As shown in Figure 6, described control unit MCU divides some work phase places according to LED lamp group quantity, and its working method is as follows:
When phase place 0, the supply voltage value of being less than V1, all LED load place not conductings of loop;
When phase place 1, supply voltage is more than or equal to V1, the second pin A0 conducting, LED lamp group L1 work;
When phase place 2, supply voltage is more than or equal to V2, the second pin A1 conducting, LED lamp group L1, L2 work;
When phase place 3, supply voltage is more than or equal to V3, the second pin A2 conducting, LED lamp group L1, L2, L3 work;
When phase place 4, supply voltage is more than or equal to V4, the second pin A3 conducting, LED lamp group L1, L2, L3, L4 work;
When phase place 5, supply voltage is more than or equal to V5, the second pin A4 conducting, LED lamp group L1, L2, L3, L4, L5 work;
When phase place 6, supply voltage is more than or equal to V4, the second pin A3 conducting, LED lamp group L1, L2, L3, L4 work;
When phase place 7, supply voltage is more than or equal to V3, the second pin A2 conducting, LED lamp group L1, L2, L3 work;
When phase place 8, supply voltage is more than or equal to V2, the second pin A1 conducting, LED lamp group L1, L2 work;
When phase place 9, supply voltage is more than or equal to V1, the second pin A0 conducting, LED lamp group L1 work;
When phase place 10, the supply voltage value of being less than V1, all LED load place not conductings of loop.
By that analogy.
Above-mentioned preferred implementation should be considered as illustrating of the application's scheme implementation mode, and identical, the approximate or technology deduction made based on this of all and the application's scheme, replacement, improvement etc. all should be considered as the protection range of this patent.
Claims (8)
1. a Dimmable LED driving power, is characterized in that: be provided with one with the first pin of LED load anodic bonding, and some the second pins being connected with LED load negative electrode, described the second pin carries out discontinuous control to the LED load circuit of its connection; Described Dimmable LED driving power also comprises
One rectifier bridge, its output anode is connected with described the first pin, for direct voltage output is provided;
One a reference source, its output is connected with described the first pin, for reference pulse modulator output voltage;
One control unit, the first control end that it is provided with control signal input, is connected with switch element, and the second control end being connected with a reference source; And
Some switch elements, its be provided with the first end that is connected with described the second pin, with the second end that described rectifier bridge output cathode is connected, by described control unit, control its conducting or cut-off;
Described control signal input, for obtaining effective level signal, described control unit controls according to this level signal the reference pulse that a reference source produces duty ratio corresponding.
2. a kind of Dimmable LED driving power according to claim 1, is characterized in that: described control unit carries out discontinuous control according to the work phase place of each switch element, successively each LED load circuit of conducting.
3. a kind of Dimmable LED driving power according to claim 2, is characterized in that: described switch element comprises a constant-current circuit, and described constant-current circuit is implemented feedback to the electric current of the LED load of flowing through.
4. a kind of Dimmable LED driving power according to claim 3, is characterized in that: between the output cathode of described rectifier bridge and switch element, be serially connected with a resistance.
5. a kind of Dimmable LED driving power according to claim 4, is characterized in that: the 3rd pin is drawn at the node place between above-mentioned resistance and switch element.
6. according to a kind of Dimmable LED driving power described in claim 1 to 5 any one, it is characterized in that: described rectifier bridge comprises the first diode, the second diode, the 3rd diode and the 4th diode, described the first diode is connected with the second diode, and described the 3rd diode is connected with the 4th diode; The negative electrode of described the second diode, the 4th diode connects the output anode of rectifier bridge, the output cathode of the anodic bonding rectifier bridge of described the first diode, the 3rd diode.
7. according to a kind of Dimmable LED driving power described in claim 1 to 5 any one, it is characterized in that: described LED load is some LED lamp groups that are connected in series, and in each LED lamp group, at least comprises a LED luminescence unit; Described the first pin connects the anode of head end LED lamp group, and described the second pin is connected to the negative electrode of node and tail end LED lamp group between each LED lamp group of string.
8. according to a kind of Dimmable LED driving power described in claim 1 to 5 any one, it is characterized in that: described significant level signal results from touch-control or tunes switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420109826.7U CN203968437U (en) | 2014-03-11 | 2014-03-11 | A kind of Dimmable LED driving power and corresponding LED light fixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420109826.7U CN203968437U (en) | 2014-03-11 | 2014-03-11 | A kind of Dimmable LED driving power and corresponding LED light fixture |
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| CN203968437U true CN203968437U (en) | 2014-11-26 |
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| CN201420109826.7U Expired - Fee Related CN203968437U (en) | 2014-03-11 | 2014-03-11 | A kind of Dimmable LED driving power and corresponding LED light fixture |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109392215A (en) * | 2017-08-07 | 2019-02-26 | 深圳市暗能量电源有限公司 | Linear power supply based on LED light group sectional dimming |
| CN110390904A (en) * | 2018-04-13 | 2019-10-29 | 比亚迪股份有限公司 | Electronic device and driving device and method for LED array |
-
2014
- 2014-03-11 CN CN201420109826.7U patent/CN203968437U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109392215A (en) * | 2017-08-07 | 2019-02-26 | 深圳市暗能量电源有限公司 | Linear power supply based on LED light group sectional dimming |
| CN110390904A (en) * | 2018-04-13 | 2019-10-29 | 比亚迪股份有限公司 | Electronic device and driving device and method for LED array |
| CN110390904B (en) * | 2018-04-13 | 2021-05-14 | 比亚迪半导体股份有限公司 | Electronic device and driving device and method of LED array |
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| C14 | Grant of patent or utility model | ||
| 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: 20141126 Termination date: 20190311 |