CN202998609U - Led constant current dimming power supply - Google Patents
Led constant current dimming power supply Download PDFInfo
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- CN202998609U CN202998609U CN 201220726846 CN201220726846U CN202998609U CN 202998609 U CN202998609 U CN 202998609U CN 201220726846 CN201220726846 CN 201220726846 CN 201220726846 U CN201220726846 U CN 201220726846U CN 202998609 U CN202998609 U CN 202998609U
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- dimming
- current
- power supply
- constant current
- voltage increase
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Abstract
The utility model relates to an LED constant current power supply. The technical problem to be solved is to provide an LED constant current dimming power supply which realizes multichannel independent dimming. The adopted technical scheme is that the LED constant current dimming power supply comprises a direct current power module, a dimming control module and a boost constant current driving module; the direct current power module and the boost constant current driving module are connected; the boost constant current driving module comprises at least two independent boost constant current driving units; the dimming control module comprises at least two control terminals; and the control terminals are connected with each boost constant current driving unit in one-to-one correspondence manner. The beneficial effects are that the LED constant current dimming power supply can conveniently realize multichannel independent dimming, has strong applicability, and can adjust the output current of the LED constant current dimming power supply to adapt to light fixtures of different types; the LED constant current dimming power supply provides abundant communication interfaces, is compatible to a plurality of control protocols, and can meet the adjustment for the LED light fixture; and the LED constant current dimming power supply is suitable for an LED illuminating system.
Description
Technical field
The utility model relates to a kind of LED constant-current supply, especially relates to a kind of LED constant-current dimming power supply.
Background technology
The LED constant-current supply can be divided into dimming power source and dimming power source not according to whether having dimming function; Can be divided into single channel out-put supply and multichannel out-put supply according to passage (being constant current driving unit) quantity.LED constant-current dimming power supply of the prior art comprises DC power supplier, dimming controlling module and constant-current driven module, DC power supplier is connected with constant-current driven module respectively with dimming controlling module, constant-current driven module comprises at least two independent constant current driving unit, and dimming controlling module has control end.Present LED constant-current dimming power supply is that same control end is connected with each constant current driving unit, can only can not realize each constant current driving unit independent dimming to each constant current driving unit adjusted in concert, causes its range of application to be restricted.In addition, dimming controlling module uses special-purpose power supply chip to carry out brightness adjustment control, if want to utilize communication interface modules to realize the electric current regulatory function, needs to utilize single-chip microcomputer that communication interface modules and power supply chip are coupled together so that set up Lighting Control Assembly.
The utility model content
Technical problem to be solved in the utility model is to provide a kind of LED constant-current dimming power supply of multichannel independent dimming.
The technical scheme that its technical problem that solves the utility model adopts is: LED constant-current dimming power supply, comprise DC power supplier, dimming controlling module and voltage increase and current constant driver module, DC power supplier is connected with the voltage increase and current constant driver module, the voltage increase and current constant driver module comprises at least two independently voltage increase and current constant driver elements, dimming controlling module comprises at least two control ends, and control end is corresponding connected one by one with each voltage increase and current constant driver element.
Concrete, dimming controlling module adopts single-chip microcomputer to control.
Concrete, control end comprises the PWM pin.
Concrete, control end comprises the analog to digital converter pin.
Preferably, the voltage increase and current constant driver element comprises the boost type translation circuit, and DC power supplier is connected with an end of inductance, and the other end of inductance is connected with the positive pole of diode, and the negative pole of diode joins by electric capacity and ground; The other end of inductance is connected with the drain electrode of switching tube again, and the PWM pin of each control end is connected with the switching tube grid of corresponding voltage increase and current constant driver element respectively, the source ground of switching tube; The analog to digital converter pin of each control end joins with ground by the sampling resistor of corresponding voltage increase and current constant driver element respectively.
Concrete, comprising communication interface modules, described communication interface modules is connected with dimming controlling module.
Preferably, communication interface modules comprises at least two communications interface units.
As the preferred version of technique scheme, communications interface unit comprises the two or more combinations in 0-10V simulation dimming interface unit, PWM digital dimming interface unit, DMX512 digital dimming interface unit or DALI digital dimming interface unit.
The beneficial effects of the utility model are: can realize easily the multichannel independent dimming, applicability is strong, and its output current of capable of regulating is to adapt to dissimilar light fixture; And abundant communication interface is provided, and compatible various control agreement can satisfy the adjusting to the LED light fixture.The utility model is applicable to the LED illuminator.
Description of drawings
Fig. 1 is the structured flowchart of the utility model embodiment;
Fig. 2 is the voltage increase and current constant driver element 1 physical circuit schematic diagram of the utility model embodiment;
Fig. 3 is the communication interface modules block diagram of the utility model embodiment;
Fig. 4 is the waveform sequential chart of the utility model embodiment;
Wherein, D1 is diode, and C1 is electric capacity, and L1 is inductance, and Q1 is switching tube, and PWM0 is the PWM pin, and AD0 is the analog to digital converter pin, and R1 is sampling resistor, and LED1 is light fixture.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail:
LED constant-current dimming power supply of the present utility model, LED constant-current dimming power supply, comprise DC power supplier, dimming controlling module and voltage increase and current constant driver module, DC power supplier is connected with the voltage increase and current constant driver module, the voltage increase and current constant driver module comprises at least two independently voltage increase and current constant driver elements, dimming controlling module comprises at least two control ends, and control end is corresponding connected one by one with each voltage increase and current constant driver element.
Dimming controlling module adopts single-chip microcomputer to control.
Control end comprises the PWM pin.
Control end comprises the analog to digital converter pin.
The voltage increase and current constant driver element comprises the boost type translation circuit, and DC power supplier is connected with an end of inductance, and the other end of inductance is connected with the positive pole of diode, and the negative pole of diode joins by electric capacity and ground; The other end of inductance is connected with the drain electrode of switching tube again, and the PWM pin of each control end is connected with the switching tube grid of corresponding voltage increase and current constant driver element respectively, the source ground of switching tube; The analog to digital converter pin of each control end joins with ground by the sampling resistor of corresponding voltage increase and current constant driver element respectively.
In order to realize the electric current regulatory function, be convenient to set up Lighting Control Assembly, above-mentioned LED constant-current dimming power supply also comprises communication interface modules, described communication interface modules is connected with dimming controlling module.
For the different Lighting Control Assembly of compatibility, communication interface modules comprises at least two communications interface units.
Concrete, communications interface unit comprises the two or more combinations in 0-10V simulation dimming interface unit, PWM digital dimming interface unit, DMX512 digital dimming interface unit or DALI digital dimming interface unit.
Embodiment
As Fig. 1, the LED constant-current dimming power supply of the present embodiment, comprise DC power supplier, dimming controlling module and voltage increase and current constant driver module, DC power supplier is connected with the voltage increase and current constant driver module, the voltage increase and current constant driver module comprises three groups of independently voltage increase and current constant driver elements, is respectively voltage increase and current constant driver element 1, voltage increase and current constant driver element 2 and voltage increase and current constant driver element 3; Dimming controlling module comprises three control ends, is respectively control end 1, control end 2 and control end 3; Each control end has respectively PWM pin and analog to digital converter pin, and control end is corresponding connected one by one with each voltage increase and current constant driver element.
Dimming controlling module adopts single-chip microcomputer to control.LED constant-current dimming power supply also comprises communication interface modules, and communication interface modules is connected with dimming controlling module.Described DC power supplier provides constant voltage source for the voltage increase and current constant driver module.DC power supplier can be to be converted to High Level AC Voltage the AC-DC converting unit of low-voltage DC, can be also other external direct current power supplies, as battery etc.Dimming controlling module is connected with communication interface modules, receives the signal from communication interface modules, controls the output current of voltage increase and current constant driver module through computing again, reaches the purpose that electric current is regulated.
Three groups independently the voltage increase and current constant driver element can realize independent dimming, be independent of each other, can meet respectively LED.All meet the LED of same colour temperature (or color) when three groups of voltage increase and current constant driver elements, can realize brightness regulation; When three groups of voltage increase and current constant driver elements meet respectively the LED of cold light or warm light, can realize colour temperature and brightness regulation; When three groups of voltage increase and current constant driver elements meet respectively the LED of different colours, connect ruddiness as voltage increase and current constant driver element 1, voltage increase and current constant driver element 2 connects green glow, and voltage increase and current constant driver element 3 connects blue light, can realize color and brightness regulation.
Fig. 2 is the physical circuit schematic diagram of the voltage increase and current constant driver element 1 of the present embodiment.The circuit of voltage increase and current constant driver element 1 comprises the boost type translation circuit, i.e. BOOST constant-current circuit, and the BOOST constant-current circuit is mainly used in output voltage greater than the occasion of input voltage, and conversion efficiency is high, and circuit structure is simple and stable.DC power supplier is connected with an end of inductance L 1, for voltage increase and current constant driver element 1 provides constant voltage; The other end of inductance L 1 is connected with the positive pole of diode D1, and the negative pole of diode D1 joins by capacitor C 1 and ground; The other end of inductance L 1 is connected with the drain electrode of switching tube Q1 again, and control end 1 is corresponding with voltage increase and current constant driver element 1, and the PWM pin PWM0 of control end 1 is connected with the grid of the switching tube Q1 of voltage increase and current constant driver element 1, the source ground of switching tube Q1; The analog to digital converter pin AD0 of control end 1 joins with ground by the sampling resistor R1 of voltage increase and current constant driver element 1.Switching tube Q1 can adopt the N-type metal-oxide-semiconductor.
Electric current through light fixture LED1, flows through sampling resistor R1 from DC power supplier, produces a voltage at the two ends of sampling resistor R1; When electric current increases, this voltage also increases, through analog to digital converter AD1 voltage sample and computing, by adjusting the pulse duration of being exported by PWM pin PWM0, conducting and the turn-off time of control switch pipe Q1, thereby the size of control voltage increase and current constant driver element 1 output current.
In like manner, the grid of its corresponding voltage increase and current constant driver element of the PWM pin switching tube of other control ends of dimming controlling module is connected, the analog to digital converter pin of other control ends of dimming controlling module is connected to the ground by the sampling resistor of its corresponding voltage increase and current constant driver element, each voltage increase and current constant driver element is controlled respectively by different pins with realization.
It is the communication interface modules unit block diagram of the utility model embodiment as Fig. 3.Abundant communication interface is arranged, with the different Lighting Control Assembly of compatibility in communication interface modules.In the present embodiment, communication interface modules comprises 0-10V simulation dimming interface unit, PWM digital dimming interface unit, DMX512 digital dimming interface unit or DALI digital dimming interface unit.
The input of 0-10V simulation dimming interface unit is the analog signal of 0-10V, and dimming controlling module is converted into corresponding current signal to sampled analogue signals, realizes regulating the output current of 0-100%.The input of PWM digital dimming interface unit is one group of PWM digital signal, and the pulse duration of dimming controlling module decoding PWM digital signal just can be exported the electric current of 0-100%.DMX512 digital dimming interface unit is a kind of digital dimming communication protocol unit, is mainly used in stage lighting and outdoor brightening illumination, and mostly is the RGB light fixture, has color adaptation, brightness regulation and chases the function such as flowing water.DALI digital dimming interface unit is a kind of digital dimming communication protocol unit, is widely used in room lighting, light fixture is carried out that point-to-point control, grouping control and the overall situation are controlled etc.
Fig. 4 is the waveform sequential chart of the utility model embodiment.Three groups of PWM waveforms of dimming controlling module output are controlled respectively voltage increase and current constant driver element 1, voltage increase and current constant driver element 2, voltage increase and current constant driver element 3, are transferred to analog to digital converter from voltage increase and current constant driver element 1, voltage increase and current constant driver element 2, voltage increase and current constant driver element 3 up-sampling voltages to the analog to digital converter pin simultaneously.The present embodiment adopts the PWM waveform to control the voltage increase and current constant driver module, regulates the pulse duration of PWM output waveform, just can change the size of current that flows through the LED two ends.In Fig. 4, the PWM1 pulse duration on the left side is little, output current I
1Just little, it is large that the right PWM2 pulse duration becomes, output current I
2Just become large.Change the control mode of output current by the mode of amplitude modulation, can realize LED two ends electric current even variation, there is no stroboscopic, can not damage eyesight.
Claims (8)
1.LED constant-current dimming power supply, comprise DC power supplier, dimming controlling module and voltage increase and current constant driver module, DC power supplier is connected with the voltage increase and current constant driver module, the voltage increase and current constant driver module comprises at least two independently voltage increase and current constant driver elements, it is characterized in that, dimming controlling module comprises at least two control ends, and control end is corresponding connected one by one with each voltage increase and current constant driver element.
2. LED constant-current dimming power supply as claimed in claim 1, is characterized in that, dimming controlling module adopts single-chip microcomputer to control.
3. LED constant-current dimming power supply as claimed in claim 2, is characterized in that, control end comprises the PWM pin.
4. LED constant-current dimming power supply as claimed in claim 3, is characterized in that, control end comprises the analog to digital converter pin.
5. LED constant-current dimming power supply as claimed in claim 4, it is characterized in that, the voltage increase and current constant driver element comprises the boost type translation circuit, and DC power supplier is connected with an end of inductance, the other end of inductance is connected with the positive pole of diode, and the negative pole of diode joins by electric capacity and ground; The other end of inductance is connected with the drain electrode of switching tube again, and the PWM pin of each control end is connected with the switching tube grid of corresponding voltage increase and current constant driver element respectively, the source ground of switching tube; The analog to digital converter pin of each control end joins with ground by the sampling resistor of corresponding voltage increase and current constant driver element respectively.
6. according to the described LED constant-current dimming of any one claim power supply in 1 to 5, it is characterized in that, comprise communication interface modules, described communication interface modules is connected with dimming controlling module.
7. LED constant-current dimming power supply as claimed in claim 6, is characterized in that, communication interface modules comprises at least two communications interface units.
8. LED constant-current dimming power supply as claimed in claim 7, it is characterized in that, communications interface unit comprises the two or more combinations in 0-10V simulation dimming interface unit, PWM digital dimming interface unit, DMX512 digital dimming interface unit or DALI digital dimming interface unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220726846 CN202998609U (en) | 2012-12-26 | 2012-12-26 | Led constant current dimming power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220726846 CN202998609U (en) | 2012-12-26 | 2012-12-26 | Led constant current dimming power supply |
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| CN202998609U true CN202998609U (en) | 2013-06-12 |
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| CN 201220726846 Expired - Fee Related CN202998609U (en) | 2012-12-26 | 2012-12-26 | Led constant current dimming power supply |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104333064A (en) * | 2014-10-29 | 2015-02-04 | 江苏东润光伏科技有限公司 | Single-lithium-battery solar energy controller with boosting LED (Light Emitting Diode) constant current driving |
| CN107396499A (en) * | 2017-08-23 | 2017-11-24 | 合肥德恒光电科技有限公司 | A kind of booster type LED constant current dimming power source |
| CN112351549A (en) * | 2020-11-24 | 2021-02-09 | 莱昊(上海)光电科技有限公司 | Device and method for carrying out digital communication with LED lamp through 0-10V dimming interface |
| CN114466478A (en) * | 2021-12-31 | 2022-05-10 | 珠海雷特科技股份有限公司 | Method for accelerating LED power supply development through integration |
-
2012
- 2012-12-26 CN CN 201220726846 patent/CN202998609U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104333064A (en) * | 2014-10-29 | 2015-02-04 | 江苏东润光伏科技有限公司 | Single-lithium-battery solar energy controller with boosting LED (Light Emitting Diode) constant current driving |
| CN107396499A (en) * | 2017-08-23 | 2017-11-24 | 合肥德恒光电科技有限公司 | A kind of booster type LED constant current dimming power source |
| CN112351549A (en) * | 2020-11-24 | 2021-02-09 | 莱昊(上海)光电科技有限公司 | Device and method for carrying out digital communication with LED lamp through 0-10V dimming interface |
| CN112351549B (en) * | 2020-11-24 | 2023-04-18 | 莱昊(上海)光电科技有限公司 | Device and communication method for digital communication with LED lamp through 0-10V dimming interface |
| CN114466478A (en) * | 2021-12-31 | 2022-05-10 | 珠海雷特科技股份有限公司 | Method for accelerating LED power supply development through integration |
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Legal Events
| Date | Code | Title | Description |
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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 |
Granted publication date: 20130612 Termination date: 20171226 |
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| CF01 | Termination of patent right due to non-payment of annual fee |