CN202565520U - LED dimming driver and LED light source system - Google Patents
LED dimming driver and LED light source system Download PDFInfo
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- CN202565520U CN202565520U CN2012200958163U CN201220095816U CN202565520U CN 202565520 U CN202565520 U CN 202565520U CN 2012200958163 U CN2012200958163 U CN 2012200958163U CN 201220095816 U CN201220095816 U CN 201220095816U CN 202565520 U CN202565520 U CN 202565520U
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Abstract
The utility model relates to an LED dimming driver and an LED light source system. The LED dimming driver comprises an EMI filter circuit, a rectifier circuit, a PFC circuit, a high-frequency DC\DC voltage reduction isolation converting circuit, a PWM control circuit, an output voltage feedback control circuit, an initial voltage regulating part, a D/A conversion circuit, an MCU chip and an isolation optocoupler A and B, wherein the EMI filter circuit, the rectifier circuit, the PFC circuit and the high-frequency DC\DC voltage reduction isolation converting circuit are connected successively, an input terminal of the PWM control circuit is connected with an output terminal of the isolation optocoupler A, an output terminal of the PWM control circuit is connected with a control terminal of the high-frequency DC\DC voltage reduction isolation converting circuit, the initial voltage regulating part is connected with an input terminal of the MCU chip, an output terminal of the MCU chip is connected with the output voltage feedback control circuit through the D/A conversion circuit and then connected with an input terminal of the isolation optocoupler A, the input terminal of the MCU chip is connected with the isolation optocoupler B, and an input terminal of the isolation optocoupler B is connected with a switch adjusting interface. The LED light source system comprises the LED dimming driver and a plurality of LED lamp sets connected in parallel at an output terminal of the LED dimming driver, and each LED lamp set comprises current limiting elements and a plurality of LED lamps, and the current limiting elements and the LED lamps are connected in series. The LED dimming driver and the LED light source system satisfy continuous dimming of the fixed-connection and non-fixed-connection lamps and are simple and convenient in construction.
Description
Technical field
The utility model relates to a kind of dimming driver that is used to regulate led light source brightness, also relates to the led light source system that uses this dimming driver.
Background technology
Improve along with the light efficiency characteristic of LED is lasting, the application that led light source gets into lighting field has been trend of the times.As shown in Figure 1, LED has operating voltage and electric current is non-linear relation, the operating voltage of each LED is the characteristics of discreteness simultaneously, in practical application, must accurately control the operating current of LED, otherwise will cause the irreversible damage of LED.Therefore, as shown in Figure 2, in existing led light source system, the LED driving power overwhelming majority adopts constant current control type power supplys 100, to guarantee the functional reliability of LED.
The illuminating LED light source need carry out light modulation usually; General at present the employing regulated the big or small of continuous current or adopted the mode of regulating the current chopping duty ratio to carry out light modulation; This dimming mode is effective for the LED light fixture that is fixedly connected; But; For the LED light fixture (like Linear light, track lamp etc.) that adopts on-fixed to connect,, possibly bring the excessive damage of electric current or the shunting very few luminous deepening of after-current even problem that can not be luminous to single led light source behind the fixed current because light fixture moves or add and subtract number and cause load variations.Therefore, adopt the mode of regulating electric current that the LED light fixture that on-fixed connects is carried out the requirement that light modulation can not be satisfied the light fixture reliably working.
To the problem in the above-mentioned practical application; The objective of the invention is to propose a kind of the employing and confirm the ceiling voltage output and the mode of modulation continuously within the specific limits; Manual adjustments through the user offers initial voltage value of LED lamp; Guaranteeing the operating voltage of LED when the darkest, is reference point according to this, and carries out incremental dimming between the promptly bright spot of voltage peak.Because ceiling voltage is known; Light source also adopts this ceiling voltage as rated voltage; In the single lamp of LED, carry out the voltage adaptation number of promptly connecting in the module, in single series loop, seal in a suitable current-limiting resistance and guarantee current deviation non-linear because of LED or that discreteness causes.
The utility model content
One of technical problem that the utility model will solve is, a kind of LED dimming driver is provided, and overcomes existing LED dimming driver and can not satisfy the defective that on-fixed connects LED light fixture requirement of light regulation.
Two of the technical problem that the utility model will solve is, a kind of led light source system is provided, and overcomes existing led light source system and can not satisfy the defective that on-fixed connects LED light fixture requirement of light regulation.
The technical scheme that one of its technical problem that solves the utility model is adopted is: construct a kind of LED dimming driver, it is characterized in that: comprise electromagnetic interference filter circuit, rectification circuit, circuit of power factor correction, high frequency DC step-down isolated variable circuit, pwm control circuit, output voltage feedback control circuit, starting voltage regulating part, D/A change-over circuit, MCU chip, isolate optocoupler A and isolate optocoupler B;
Said electromagnetic interference filter circuit, rectification circuit, circuit of power factor correction, high frequency DC step-down conversion circuit be linked in sequence; High frequency DC the output of step-down conversion circuit be the output of said LED dimming driver, said circuit of power factor correction input is the input of said LED dimming driver;
Said pwm control circuit input connect isolate optocoupler A output, output connect high frequency DC step-down isolated variable circuit control end;
Said starting voltage regulating part connects the MCU input, and the MCU output connects after the D/A change-over circuit connects the output voltage feedback control circuit again isolates optocoupler A input; The MCU input connects isolates optocoupler B, isolates optocoupler B input and is connected to switch light modulation port, and said output voltage feedback control circuit connects the output of LED dimming driver simultaneously;
The said LED dimming driver control port control signal value upper limit is to should LED dimming driver output output voltage limit, and this LED dimming driver control port control signal value lower limit is to starting voltage that should the work of LED dimming driver output output voltage driving LED load lamp group.
In the LED of the utility model dimming driver, the control signal of said LED dimming driver control port is a standard dimming interface DC1-10V voltage, or the control signal of said LED dimming driver control port is a standard dimming interface DC4-20MA electric current.
In the LED of the utility model dimming driver, said LED dimming driver output output voltage limit is 12 volts, is limited to 10 volts on this LED dimming driver control port voltage signal values, is limited to 1 volt down; Or said LED dimming driver output output voltage limit is 12 volts, is limited to 20 milliamperes on this LED dimming driver control port current signal value, is limited to 4 milliamperes down.
The technical scheme that two of its technical problem that solves the utility model is adopted is: construct a kind of led light source system, comprise LED dimming driver and the some LED lamp groups that are connected in this LED dimming driver output in parallel, it is characterized in that:
Said LED dimming driver comprise electromagnetic interference filter circuit, rectification circuit, circuit of power factor correction, high frequency DC step-down isolated variable circuit, pwm control circuit, output voltage feedback control circuit, starting voltage regulating part, D/A change-over circuit, MCU chip, isolate optocoupler A and isolate optocoupler B;
Said electromagnetic interference filter circuit, rectification circuit, circuit of power factor correction, high frequency DC step-down conversion circuit be linked in sequence; High frequency DC the output of step-down conversion circuit be the output of said LED dimming driver, said circuit of power factor correction input is the input of said LED dimming driver;
Said pwm control circuit input connect isolate optocoupler A output, output connect high frequency DC step-down isolated variable circuit control end;
Said starting voltage regulating part connects the MCU input, and the MCU output connects after the D/A change-over circuit connects the output voltage feedback control circuit again isolates optocoupler A input; The MCU input connects isolates optocoupler B, isolates optocoupler B input and is connected to switch light modulation port, and said output voltage feedback control circuit connects the output of LED dimming driver simultaneously;
The said LED dimming driver control port control signal value upper limit is to should LED dimming driver output output voltage limit, and this LED dimming driver control port control signal value lower limit is to starting voltage that should the work of LED dimming driver output output voltage driving LED load lamp group;
Each said LED lamp group comprises current limiting element and the some LED lamps that is connected in series.
In the led light source system of the utility model, the control signal of said LED dimming driver control port is a standard dimming interface DC1-10V voltage, or the control signal of said LED dimming driver control port is a standard dimming interface DC4-20MA electric current.
In the led light source system of the utility model, said LED dimming driver output output voltage limit is 12 volts, is limited to 10 volts on this LED dimming driver control port voltage signal values, is limited to 1 volt down; Or said LED dimming driver output output voltage limit is 12 volts, is limited to 20 milliamperes on this LED dimming driver control port current signal value, is limited to 4 milliamperes down.
In the led light source system of the utility model, said current limiting element is a resistance.
Implement the LED dimming driver and the led light source system of the utility model, compare with prior art, its beneficial effect is:
1. the continuous light tuning of the LED light fixture of fixed connection not only can be satisfied, and the continuous light tuning of the LED light fixture of on-fixed connection can be satisfied.
2. simple in structure, implement easily.
Description of drawings
To combine accompanying drawing and embodiment that the utility model is described further below, in the accompanying drawing:
Fig. 1 is the LED light-emitting characteristic curve.
Fig. 2 is the circuit diagram of existing a kind of embodiment of led light source system.
Fig. 3 is the circuit theory diagrams of a kind of embodiment of the utility model LED dimming driver.
Fig. 4 is the circuit diagram of the utility model led light source a kind of embodiment of system.
Embodiment
As shown in Figure 3; The LED dimming driver 1 of the utility model comprise EMI filter circuit (filtering of Electromagnetic Interference electromagnetic interference) 101, rectification circuit 102, pfc circuit (Power Factor Correction power factor correction) 103, high frequency DC step-down isolated variable circuit 105, pwm control circuit (Pulse Width Modulation pulse-width modulation) 104, output voltage feedback control circuit 2, starting voltage regulating part 110, D/A change-over circuit 108, MCU chip 109, isolate optocoupler A107 and isolate optocoupler B106.
The control end of pwm control circuit 104 connect high frequency DC the control end of step-down isolated variable circuit 105, the input of pwm control circuit 104 connects the output of isolating optocoupler A107.Pwm control circuit 104 is connected with pfc circuit 103 with rectification circuit 102 output negative terminals respectively simultaneously.
Output voltage feedback control circuit 2 through isolate optocoupler A connect high frequency DC the control end, the input that MCU chip 109 is connected to D/A change-over circuit 108 of step-down isolated variable circuit 105; The output of D/A change-over circuit 108 is connected to output voltage feedback control circuit 2, and output voltage feedback control circuit 2 inputs connect two outputs of LED dimming driver.
Starting voltage regulating part 110 can adopt and include but not limited to long handle hand adjustment potentiometer, half adjustable potentiometer, trimmer potentiometer, sealing precision potentiometer, controlled digital regulation resistance, toggle switch combination or the like.
The control end of MCU chip 109 is the control port 9 of LED dimming driver 1, and the conditioning signal of control port 9 can be standard dimming interface DC1-10V voltage or is standard dimming interface DC4-20MA electric current.The signal input part of MCU chip 109 connects the output of isolating optocoupler 106, and the input of isolating optocoupler 106 connects the switch light modulation port one 0 of LED dimming driver 1.MCU chip 109 is used for signal processing and control output.
Switch brightness adjustment control port one 0 is a SWITCH-DIM brightness adjustment control port; Add voltage signal through switch at this port; LED dimming driver output output voltage slowly is adjusted to the starting voltage of LED load lamp group work from the upper limit, or slowly is adjusted to the upper voltage limit of LED load lamp group from the starting voltage of LED load lamp group work, toward raising or in the process of reducing; In case dimmer switch breaks off, the LED dimming driver just rests on this state.
The control signal value upper limit of the control port of LED dimming driver 1 is to output output voltage limit that should LED dimming driver 1, and LED dimming driver 1 control port control signal value lower limit is to starting voltage that should the 1 output output voltage driving LED load lamp group work of LED dimming driver.This starting voltage is by realizing manually.
As shown in Figure 4, the led light source system of the utility model comprises LED dimming driver 1 and the some LED lamp groups (LED lamp group 5,6,7,8 has been shown among the figure) that are connected in this LED dimming driver 1 output in parallel.Wherein, LED dimming driver 1 adopts above-mentioned LED dimming driver, repeats no more at this, and each LED lamp group comprises the current limiting element 11 and some LED lamps 12 that is connected in series, and current limiting element 11 can adopt resistance or current regulator diode etc.
In the present embodiment; A plurality of LED lamp groups are connected on light fixture backguy or the light fixture track 4; LED dimming driver 1 is set; The brightness adjustment control port control signal is the general light modulation port of 1-10V or 4-20mA, and LED dimming driver 1 output upper voltage limit is DC12V, and LED lamp group is 3-4 LED series connection (quantity of LED lamp is looked the operating voltage of concrete LED lamp and decided).Make the LED lamp from the attitude that do not work near luminance, initial voltage generally can be in about 1/3 of its rated voltage.In the present embodiment; Through user's manual adjustments output starting voltage regulating part 2; Make LED lamp group Weak-luminescence, at this moment, the MCU chip in the LED dimming driver 1 can arrive the darkest minimum voltage as the light modulation of LED light fixture with this voltage; Simultaneously the scope between the ceiling voltage DC12V of LED dimming driver 1 output is carried out classification, as be divided into 512 grades or 1024 grades etc.Initial voltage is with respect to the 1V state or the 4mA state of the control port 9 of LED dimming driver 1, and DC12V is corresponding to the 10V state or the 20mA state of the control port 9 of LED dimming driver 1.Regulate the voltage or the electric current input of the control port 9 of LED dimming driver 1; Corresponding to pressing the output that classification changes voltage between LED dimming driver 1 output initial voltage to the ceiling voltage; Thereby the operating current in each LED lamp group is changed with the dimming curve of setting, reach the purpose of light modulation.
Simultaneously; Owing to be provided with a current limiting device (big or small those of ordinary skills of this current limiting element can confirm) in each LED lamp group; Even LED dimming driver 1 is output as ceiling voltage; LED lamp group is worked under rated operational voltage, and the discreteness that also is unlikely owing to each LED lamp in the lamp group causes the overcurrent damage.
Claims (7)
1. LED dimming driver is characterized in that: comprise electromagnetic interference filter circuit, rectification circuit, circuit of power factor correction, high frequency DC step-down isolated variable circuit, pwm control circuit, output voltage feedback control circuit, starting voltage regulating part, D/A change-over circuit, MCU chip, isolate optocoupler A and mouthful isolate optocoupler B;
Said electromagnetic interference filter circuit, rectification circuit, circuit of power factor correction, high frequency DC step-down conversion circuit be linked in sequence; High frequency DC the output of step-down conversion circuit be the output of said LED dimming driver, said circuit of power factor correction input is the input of said LED dimming driver;
Said pwm control circuit input connect isolate optocoupler A output, output connect high frequency DC step-down isolated variable circuit control end;
Said starting voltage regulating part connects the MCU input, and the MCU output connects after the D/A change-over circuit connects the output voltage feedback control circuit again isolates optocoupler A input; The MCU input connects isolates optocoupler B, isolates optocoupler B input and is connected to switch light modulation port, and said output voltage feedback control circuit connects the output of LED dimming driver simultaneously;
The said LED dimming driver control port control signal value upper limit is to should LED dimming driver output output voltage limit, and this LED dimming driver control port control signal value lower limit is to starting voltage that should the work of LED dimming driver output output voltage driving LED load lamp group.
2. LED dimming driver as claimed in claim 1; It is characterized in that: the control signal of said LED dimming driver control port is a standard dimming interface DC1-10V voltage, or the control signal of said LED dimming driver control port is a standard dimming interface DC4-20MA electric current.
3. LED dimming driver as claimed in claim 2 is characterized in that: said LED dimming driver output output voltage limit is 12 volts, is limited to 10 volts on this LED dimming driver control port voltage signal values, is limited to 1 volt down; Or said LED dimming driver output output voltage limit is 12 volts, is limited to 20 milliamperes on this LED dimming driver control port current signal value, is limited to 4 milliamperes down.
4. a led light source system comprises LED dimming driver and the some LED lamp groups that are connected in this LED dimming driver output in parallel, it is characterized in that:
Said LED dimming driver comprise electromagnetic interference filter circuit, rectification circuit, circuit of power factor correction, high frequency DC step-down isolated variable circuit, pwm control circuit, output voltage feedback control circuit, starting voltage regulating part, D/A change-over circuit, MCU chip, isolate optocoupler A and isolate optocoupler B:
Said electromagnetic interference filter circuit, rectification circuit, circuit of power factor correction, high frequency DC step-down conversion circuit be linked in sequence; High frequency DC the output of step-down conversion circuit be the output of said LED dimming driver, said circuit of power factor correction input is the input of said LED dimming driver;
Said pwm control circuit input connect isolate optocoupler A output, output connect high frequency DC step-down isolated variable circuit control end;
Said starting voltage regulating part connects the MCU input, and the MCU output connects after the D/A change-over circuit connects the output voltage feedback control circuit again isolates optocoupler A input; The MCU input connects isolates optocoupler B, isolates optocoupler B input and is connected to switch light modulation port, and said output voltage feedback control circuit connects the output of LED dimming driver simultaneously;
The said LED dimming driver control port control signal value upper limit is to should LED dimming driver output output voltage limit, and this LED dimming driver control port control signal value lower limit is to starting voltage that should the work of LED dimming driver output output voltage driving LED load lamp group;
Each said LED lamp group comprises current limiting element and the some LED lamps that is connected in series.
5. led light source as claimed in claim 4 system; It is characterized in that: the control signal of said LED dimming driver control port is a standard dimming interface DC1-10V voltage, or the control signal of said LED dimming driver control port is a standard dimming interface DC4-20MA electric current.
6. led light source as claimed in claim 5 system, it is characterized in that: said LED dimming driver output output voltage limit is 12 volts, is limited to 10 volts on this LED dimming driver control port voltage signal values, is limited to 1 volt down; Or said LED dimming driver output output voltage limit is 12 volts, is limited to 20 milliamperes on this LED dimming driver control port current signal value, is limited to 4 milliamperes down.
7. like the described led light source of one of claim 4 to 6 system, it is characterized in that: said current limiting element is a resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200958163U CN202565520U (en) | 2012-03-14 | 2012-03-14 | LED dimming driver and LED light source system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200958163U CN202565520U (en) | 2012-03-14 | 2012-03-14 | LED dimming driver and LED light source system |
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| CN202565520U true CN202565520U (en) | 2012-11-28 |
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| CN2012200958163U Expired - Fee Related CN202565520U (en) | 2012-03-14 | 2012-03-14 | LED dimming driver and LED light source system |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104470160A (en) * | 2015-01-06 | 2015-03-25 | 宁波江北华瑞电子有限公司 | Self-adaption efficient LED driving power supply |
| CN104994637A (en) * | 2015-06-29 | 2015-10-21 | 赛尔富电子有限公司 | LED light fixture power supply |
| CN105656292A (en) * | 2016-03-24 | 2016-06-08 | 深圳市核达中远通电源技术有限公司 | Circuit capable of realizing slight regulation of PFC voltage along with output voltage |
| WO2016141558A1 (en) * | 2015-03-11 | 2016-09-15 | Tridonic Gmbh & Co. Kg | Isolated interface with current transformer |
| CN107343336A (en) * | 2016-05-03 | 2017-11-10 | 海洋王（东莞）照明科技有限公司 | Adjusting control circuit and lighting device |
| CN108469775A (en) * | 2018-06-29 | 2018-08-31 | 赵明 | One kind 4 ~ 20mA signal isolation circuits and multifunctional isolating transmitter |
| WO2019100274A1 (en) * | 2017-11-23 | 2019-05-31 | 沈佩军 | Fan527b-based led tunnel lamp driver |
| CN110557859A (en) * | 2018-06-04 | 2019-12-10 | 光宝电子(广州)有限公司 | indicator light device and control method thereof |
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2012
- 2012-03-14 CN CN2012200958163U patent/CN202565520U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104470160A (en) * | 2015-01-06 | 2015-03-25 | 宁波江北华瑞电子有限公司 | Self-adaption efficient LED driving power supply |
| WO2016141558A1 (en) * | 2015-03-11 | 2016-09-15 | Tridonic Gmbh & Co. Kg | Isolated interface with current transformer |
| CN104994637A (en) * | 2015-06-29 | 2015-10-21 | 赛尔富电子有限公司 | LED light fixture power supply |
| CN104994637B (en) * | 2015-06-29 | 2018-02-16 | 赛尔富电子有限公司 | A kind of LED lamp power supply |
| CN105656292A (en) * | 2016-03-24 | 2016-06-08 | 深圳市核达中远通电源技术有限公司 | Circuit capable of realizing slight regulation of PFC voltage along with output voltage |
| CN107343336A (en) * | 2016-05-03 | 2017-11-10 | 海洋王（东莞）照明科技有限公司 | Adjusting control circuit and lighting device |
| CN107343336B (en) * | 2016-05-03 | 2019-03-22 | 海洋王（东莞）照明科技有限公司 | Adjusting control circuit and lighting device |
| WO2019100274A1 (en) * | 2017-11-23 | 2019-05-31 | 沈佩军 | Fan527b-based led tunnel lamp driver |
| CN110557859A (en) * | 2018-06-04 | 2019-12-10 | 光宝电子(广州)有限公司 | indicator light device and control method thereof |
| CN108469775A (en) * | 2018-06-29 | 2018-08-31 | 赵明 | One kind 4 ~ 20mA signal isolation circuits and multifunctional isolating transmitter |
| CN108469775B (en) * | 2018-06-29 | 2023-11-28 | 赵明 | 4-20 mA signal isolation circuit and multifunctional isolation transmitter |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121128 Termination date: 20150314 |
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| EXPY | Termination of patent right or utility model |