CN203151818U - Multi-mode light adjustment control and constant current driving circuit used for LED lighting - Google Patents
Multi-mode light adjustment control and constant current driving circuit used for LED lighting Download PDFInfo
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- CN203151818U CN203151818U CN 201320061110 CN201320061110U CN203151818U CN 203151818 U CN203151818 U CN 203151818U CN 201320061110 CN201320061110 CN 201320061110 CN 201320061110 U CN201320061110 U CN 201320061110U CN 203151818 U CN203151818 U CN 203151818U
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Abstract
The utility model relates to a multi-mode light adjustment control and constant current driving circuit used for LED lighting. The multi-mode light adjustment control and constant current driving circuit is characterized in that the multi-mode light adjustment control and constant current driving circuit includes a constant current driving power supply module, a light adjustment decoding module and a constant current driving output module which are connected with each other; the constant current driving power supply module includes a rectifying and filtering module, an PFC correction module, a voltage conversion switch module and a PWM control module which are connected with each other successively; the light adjustment decoding module includes a light adjustment decoding unit and a light adjustment signal interface; a power supply input end of the light adjustment decoding unit is connected with an output end of the voltage conversion switch module; a signal input end of the light adjustment decoding unit is connected with the light adjustment signal interface; and a signal output end of the light adjustment decoding unit is connected with the constant current driving output module. With the multi-mode light adjustment control and constant current driving circuit of the utility model adopted, the problem that traditional light adjustment signals cannot be directly used for the light adjustment of the LED lighting can be solved; and different light adjustment decoding modules can be replaced according to the requirements of different users and signal conversion requirements of different light adjustment systems.
Description
Technical field
The utility model relates to LED illumination control field, relates in particular to a kind of multi-mode brightness adjustment control and constant-current drive circuit for the LED illumination.
Background technology
LED illumination is the whole world third generation light source of generally acknowledging in recent years, the LED illuminating product is paid close attention to gradually widely with its energy-saving and environmental protection, long-life characteristic, still be the interior decoration illumination from outdoor advertising illumination, landscape light in city no matter, the LED illuminating product is familiar with by the numerous common people more and more.The extensive use of LED illumination has also adapted to the requirement of government's energy-saving and emission-reduction.At present, national governments are all actively eliminating low usefulness illuminating product, and European Union has completely forbidden import or production conventional incandescent, and China has also begun to promote on a large scale energy-conserving product, eliminates the product of low usefulness.
Because LED belongs to a kind of light-emitting diode, realize the various combination of its watt level, shape and function easily by the quantity that adopts different LED, thereby be widely used, in like manner, realize easily that also electric function controls its brightness and variation.Yet, the LED illumination need be different from the led driver of flourescent ballast, provide a constant operating current as the constant-current type Switching Power Supply to LED, can avoid current overload to cause the infringement of led chip, also can avoid the situation of colour temperature drift under the different current works, so the LED illumination adopts the constant-current type Switching Power Supply generally to accept for industry.Simultaneously, PWM (pulse-width modulation) light regulating technology also is known as only light-dimming method by the LED illuminating industry.
Yet the LED illumination that the constant-current type Switching Power Supply drives also can't directly adopt existing light adjusting system to realize dimming function.The traditional lighting light adjusting system as the 0/1-10V linearity light adjusting system, provides a 1-10V linear analogue dim signal, has been widely used in traditional light adjusting system.DALI digital dimming technology is the abbreviation of digital addressable lighting interface (Digital Addressable Lighting Interface).DALI provides rule of communication as the part of IEC60929 standard for illumination component, also has been widely used in the existing Lighting Control Assembly.But, widely used 0/1-10V light adjusting system only provides the linear analogue dim signal in the traditional lighting, can't directly export the PWM dim signal, and the PWM dim signal that DALI digital dimming technology adopts is also different with the LED needed PWM dim signal that throws light on.If partly or entirely substitute conventional lamp with the LED lighting, just need the extensive existing electric wiring that changes.Have the incompatible of light regulating technology and LED brightness adjustment control scheme now, cause the popularization of LED illumination to be subjected to numerous obstacles.
Therefore be necessary to develop and a kind ofly convert traditional dim signal the conversion equipment of the discernible PWM dim signal of led driver to, make the LED lighting can be under the prerequisite that not change existing electric wiring, be more widely used and promote.
China utility model patent ZL201010547782.2 has announced the LED constant-current control device under a kind of PWM constant current mode, and it has disclosed a kind of PWM constant current method and has reached based on the light-dimming method under the PWM constant current mode.Yet, this patent realizes that the functional unit of PWM dim signal control is connected between constant-current supply output and the LED lighting load, determine the PWM dim signal indirectly by light-sensitive device and current sample, the realization of its PWM light modulation is associated with the size of constant-current supply and LED lighting load, in case application requirements changes, be that power supply output and load size change, its interlock circuit design and component parameter also must be made corresponding variation ability steady operation, and the use that has increased product limits or increased the kind of product.
The utility model content
The purpose of this utility model is, a kind of versatility, the strong multi-mode brightness adjustment control and the constant-current drive circuit that are used for the LED illumination of flexibility are provided, use to realize the LED lighting directly is connected in the traditional lighting circuit of existing various modes, and need not to change existing power supply and light adjusting system wiring.
For achieving the above object, the utility model by the following technical solutions:
A kind of multi-mode brightness adjustment control and constant-current drive circuit for the LED illumination, comprise that interconnective constant-current driving power supply module, light modulation decoder module and constant current drive output module, described constant-current driving power supply module comprises rectification filtering module, PFC correction module, voltage change-over switch module and the PWM control module that connects successively; Described light modulation decoder module comprises light modulation decoding unit and dim signal interface, the power input of described light modulation decoding unit is connected with the output of voltage change-over switch module, the signal input part of light modulation decoding unit is connected with the dim signal interface, and the signal output part of light modulation decoding unit drives output module with constant current and is connected.
Described constant current drives output module and comprises constant current control module and current detection module, the power input of described constant current control module and current detection module is connected with the output of voltage change-over switch module respectively, the signal input part of constant current control module is connected with the signal output part of light modulation decoding unit, the output of constant current control module is connected with the signal input part of current detection module, and the output of current detection module is connected with the external LED lighting load.
Current detection module also is connected with the current feedback terminal of constant current control module.
Described light modulation decoding unit is 0/1-10V light modulation decoding unit, and described dim signal interface is 0/1-10V dim signal interface.
Described light modulation decoding unit is DALI light modulation decoding unit, and described dim signal interface is DALI dim signal interface.
Described light modulation decoder module also comprises PWM dim signal interface, and described PWM dim signal interface is connected with the signal input part of constant current control module.
Described 0/1-10V light modulation decoding unit comprises the PIC16F616 chip and the bypass circuit that is connected thereon that MICROCHIP company produces.
Described DALI light modulation decoding unit comprises the uPD78F0756 chip and the bypass circuit that is connected thereon that RENESAS company produces.
Each output of described voltage change-over switch module also is connected with the voltage feedback input end of PWM control module.
Described current detection module is connected with the 32V ~ 57V voltage output end of voltage change-over switch module; The constant current control module is connected with the 12V voltage output end of voltage change-over switch module; The light modulation decoding unit is connected with the 5.1V voltage output end of voltage change-over switch module, also is connected with the 12V voltage output end.
The multi-mode brightness adjustment control and the constant-current drive circuit that are used for the LED illumination that the utility model provides, not only solved the difficult problem that the traditional lighting dim signal can not be directly used in the light modulation of LED illumination, and can replace and use different light modulation decoder modules according to the signal conversion requirement of different user, different light adjusting systems.By the traditional lighting dim signal being converted to the PWM dim signal that led drive circuit can be used, can being implemented under the prerequisite that does not change existing power supply and light adjusting system wiring, will be with the traditional lighting load of dimming function to replace to the LED lighting load.Simultaneously, constant current drives output module both can realize the PWM light modulation, again corresponding constant current value can be set according to the size of LED lighting load, the LED constant-current supply scope of application than other built-in light modulation unit is extensive more, convenient, flexible, can realize producing in enormous quantities, save unnecessary manufacturing cost.
Description of drawings
Fig. 1 is the structured flowchart of the LED constant-current control device under a kind of PWM constant current mode of the prior art.
Fig. 2 is the structural representation of the utility model embodiment.
Fig. 3 is the circuit diagram of the DALI light modulation decoding unit among the utility model embodiment.
Fig. 4 is the circuit diagram of the 0/1-10V light modulation decoding unit among the utility model embodiment.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment content of the present utility model is described in detail.
As shown in Figure 1, be the structured flowchart of the LED constant-current control device under disclosed a kind of PWM constant current mode.It realizes that the functional unit of PWM dim signal control is connected between constant-current supply output and the LED lighting load, determine the PWM dim signal indirectly by light-sensitive device and current sample, the realization of its PWM light modulation is associated with the size of constant-current supply and LED lighting load, in case application requirements changes, be that power supply output and load size change, its interlock circuit design and component parameter also must be made corresponding variation ability steady operation, and the use that has increased product limits or increased the kind of product.
As shown in Figure 2, the multi-mode brightness adjustment control that is used for the LED illumination that the utility model embodiment provides and constant-current drive circuit comprise that interconnective constant-current driving power supply module, light modulation decoder module and constant current drive output module.
Particularly, described constant-current driving power supply module comprises rectification filtering module, PFC correction module, voltage change-over switch module and the PWM control module that connects successively.Described light modulation decoder module comprises light modulation decoding unit and dim signal interface, the power input of described light modulation decoding unit is connected with the output of voltage change-over switch module, the signal input part of light modulation decoding unit is connected with the dim signal interface, and the signal output part of light modulation decoding unit drives output module with constant current and is connected.
Described current rectifying and wave filtering circuit is used for civil power input is carried out filtering, rectification, and each module in the output DC power supply road is used.
The PFC correction module is used for proofreading and correct the galvanic power factor of current rectifying and wave filtering circuit output.
The voltage change-over switch module comprises interconnective voltage conversion circuit and power switch pipe, and the direct voltage that is converted to various amplitudes for the direct current with current rectifying and wave filtering circuit output offers light modulation decoding unit and the use of constant current driving output module.
Described PWM control module is used for realizing the voltage transitions of various amplitudes to voltage change-over switch module output pwm control signal.The voltage feedback input end of described PWM control module also is connected with each output of voltage change-over switch module, is used for receiving the feedback signal of voltage transformation module output, is convenient to adjust in real time pwm control signal.
In the practical application at present, what comparatively general traditional lighting dim signal such as 0/1-10V dim signal and DALI dim signal produced is not the PWM dim signal, therefore is that the constant-current supply of directly driving LED lighting load carries out the PWM light modulation.The described light modulation decoder module of the utility model embodiment be used for to receive traditional dim signal, decoding and recompile, be converted into constant current drive output module can with, the PWM dim signal that is applicable to LED lighting brightness adjustment control.Wherein, described light modulation decoder module is interchangeable in circuit, can replace and use different light modulation decoder modules according to the signal conversion requirement of different user, different light adjusting systems.Different light modulation decoder modules a kind of traditional dim signal of can changing respectively and decode, if a plurality of different light modulation decoder modules are designed to identical operating voltage and export the PWM dim signal of same pattern, can realize that the replacement of a plurality of light modulation decoder modules in the utility model circuit use.Because the light modulation decoder module has replaceability, makes the utility model embodiment have applicability and versatility widely.
In the utility model embodiment, provide the physical circuit of two kinds of light modulation decoder modules.
Wherein, first kind of light modulation decoder module connected to form by DALI light modulation decoding unit and DALI dim signal interface.Particularly, as shown in Figure 3, described DALI light modulation decoding unit comprises the uPD78F0756 chip and the bypass circuit that is connected thereon that RENESAS company produces.In DALI light modulation decoding unit, behind the DALI dim signal process rectifier bridge BD1 that DALI dim signal interface receives, through being connected to the 5th pin of uPD78F0756 chip after voltage stabilizing didoe ZD1, resistance R 9, optocoupler U3, resistance R 7, resistance R 8, the resistance R 10, resistance R 7 and resistance R 8 are also in parallel with triode Q2 successively; Feedback end the 4th pin of uPD78F0756 chip passes through resistance R 5 and optocoupler U2 successively, is connected to rectifier bridge BD1, also is connected with resistance R 4, resistance R 6 and triode Q1 between two outputs of optocoupler U2.The 7th pin of uPD78F0756 chip is connected external 5V operating voltage through resistance R 1 respectively with the 8th pin with resistance R 2, the 9th pin, the 10th pin, the 12nd pin and the 27th pin pass through resistance R 3, capacitor C 2, capacitor C 3 and capacitor C 1 back ground connection, the 11st pin and the direct ground connection of the 28th pin respectively.The 16th pin of uPD78F0756 chip, the 17th pin, the 18th pin and the 19th pin are the pwm signal output.
Second kind of light modulation decoder module connected to form by 0/1-10V light modulation decoding unit and 0/1-10V dim signal interface.As shown in Figure 4, described 0/1-10V light modulation decoding unit comprises the PIC16F616 chip and the bypass circuit that is connected thereon that MICROCHIP company produces.Particularly, the 0/1-10V dim signal that 0/1-10V dim signal interface receives is connected to the 9th pin of PIC16F616 chip on the other hand on the one hand by capacitor C 19 ground connection through resistance R 21.The operating voltage of+12V is connected to the 9th pin of PIC16F616 chip on the other hand successively on the one hand by capacitor C 18 ground connection through diode D8, resistance R 22, resistance R 21.The 9th pin of PIC16F616 chip also passes through capacitor C 17 and resistance R 20 ground connection respectively.The direct ground connection of the 13rd pin of PIC16F616 chip.The 16th pin of PIC16F616 chip connects the operating voltage of 5V, and by capacitor C 16 ground connection.The operating voltage of 5V also is connected to the 8th pin through diode D6, is connected with resistance R 17 and resistance R 18, the 3 pins between the 8th pin and the 3rd pin through resistance R 18 ground connection.Comparative voltage A passes through the 8th pin that diode 9 and resistance R 16 are connected to the PIC16F616 chip on the one hand successively, also be connected to the 4th pin through triode Q3 and resistance R 19 successively on the other hand, also be connected with capacitor C 20 between the base stage of triode Q3 and the emitter, wherein the 4th pin is the pwm signal output of PIC16F616 chip.
Above-mentioned two kinds of light modulation decoder modules can be replaced use flexibly according to actual conditions.The pwm signal that the signal output part of light modulation decoding unit will be changed back output outputs to constant current driving output module.As reservation, described light modulation decoder module also comprises PWM dim signal interface, described PWM dim signal interface directly drives output module with constant current and is connected, and is used for directly receiving the PWM dim signal, and by constant current driving output module the LED lighting load is carried out light modulation.
Concrete, described constant current drives output module and comprises constant current control module and current detection module, the signal input part of constant current control module is connected with the signal output part of light modulation decoding unit, the output of constant current control module is connected with the signal input part of current detection module, and the output of current detection module is connected with the external LED lighting load.Current detection module also is connected with the current feedback terminal of constant current control module, for detection of the electric current of constant current control module output, and feeds back to the constant current control module, makes the current value of constant current control module output keep constant.
The power input of described constant current control module is connected with the output of voltage change-over switch module, and the power input of current detection module also is connected with the output of voltage change-over switch module.
In the utility model embodiment, the voltage change-over switch module is respectively to the operating voltage of light modulation decoder module and constant current control module output 5.1V and 12V, simultaneously, the operating voltage of 12V also is transported to light modulation decoding unit in the light modulation decoder module as reference voltage.The voltage change-over switch module is exported the voltage of 32V ~ 57V to current detection module, to adapt to the different needs for electricity of LED lighting load.
The multi-mode brightness adjustment control and the constant-current drive circuit that are used for the LED illumination that the utility model provides, not only solved the difficult problem that the traditional lighting dim signal can not be directly used in the light modulation of LED illumination, and can replace and use different light modulation decoder modules according to the signal conversion requirement of different user, different light adjusting systems.By the traditional lighting dim signal being converted to the PWM dim signal that led drive circuit can be used, can being implemented under the prerequisite that does not change existing power supply and light adjusting system wiring, will be with the traditional lighting load of dimming function to replace to the LED lighting load.Simultaneously, constant current drives output module both can realize the PWM light modulation, again corresponding constant current value can be set according to the size of LED lighting load, the LED constant-current supply scope of application than other built-in light modulation unit is extensive more, convenient, flexible, can realize producing in enormous quantities, save unnecessary manufacturing cost.
The above embodiment has only expressed several execution mode of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model claim.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the utility model design, can also make some distortion and improvement, these all belong to protection range of the present utility model.Therefore, the protection range of the utility model patent should be as the criterion with claims.
Claims (10)
1. one kind is used for multi-mode brightness adjustment control and the constant-current drive circuit that LED throws light on, it is characterized in that, comprise that interconnective constant-current driving power supply module, light modulation decoder module and constant current drive output module, described constant-current driving power supply module comprises rectification filtering module, PFC correction module, voltage change-over switch module and the PWM control module that connects successively; Described light modulation decoder module comprises light modulation decoding unit and dim signal interface, the power input of described light modulation decoding unit is connected with the output of voltage change-over switch module, the signal input part of light modulation decoding unit is connected with the dim signal interface, and the signal output part of light modulation decoding unit drives output module with constant current and is connected.
2. multi-mode brightness adjustment control and constant-current drive circuit for LED illumination according to claim 1, it is characterized in that, described constant current drives output module and comprises constant current control module and current detection module, the power input of described constant current control module and current detection module is connected with the output of voltage change-over switch module respectively, the signal input part of constant current control module is connected with the signal output part of light modulation decoding unit, the output of constant current control module is connected with the signal input part of current detection module, and the output of current detection module is connected with the external LED lighting load.
3. multi-mode brightness adjustment control and constant-current drive circuit for the LED illumination according to claim 2 is characterized in that current detection module also is connected with the current feedback terminal of constant current control module.
4. multi-mode brightness adjustment control and constant-current drive circuit for the LED illumination according to claim 2 is characterized in that described light modulation decoding unit is 0/1-10V light modulation decoding unit, and described dim signal interface is 0/1-10V dim signal interface.
5. multi-mode brightness adjustment control and constant-current drive circuit for the LED illumination according to claim 2 is characterized in that described light modulation decoding unit is DALI light modulation decoding unit, and described dim signal interface is DALI dim signal interface.
6. according to claim 4 or 5 described multi-mode brightness adjustment control and constant-current drive circuits for the LED illumination, it is characterized in that, described light modulation decoder module also comprises PWM dim signal interface, and described PWM dim signal interface is connected with the signal input part of constant current control module.
7. multi-mode brightness adjustment control and constant-current drive circuit for the LED illumination according to claim 4 is characterized in that, described 0/1-10V light modulation decoding unit comprises the PIC16F616 chip and the bypass circuit that is connected thereon that MICROCHIP company produces.
8. multi-mode brightness adjustment control and constant-current drive circuit for the LED illumination according to claim 5 is characterized in that, described DALI light modulation decoding unit comprises the uPD78F0756 chip and the bypass circuit that is connected thereon that RENESAS company produces.
9. multi-mode brightness adjustment control and constant-current drive circuit for the LED illumination according to claim 1 and 2 is characterized in that each output of described voltage change-over switch module also is connected with the voltage feedback input end of PWM control module.
10. multi-mode brightness adjustment control and constant-current drive circuit for the LED illumination according to claim 2 is characterized in that described current detection module is connected with the 32V ~ 57V voltage output end of voltage change-over switch module; The constant current control module is connected with the 12V voltage output end of voltage change-over switch module; The light modulation decoding unit is connected with the 5.1V voltage output end of voltage change-over switch module, also is connected with the 12V voltage output end.
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| CN 201320061110 CN203151818U (en) | 2013-01-31 | 2013-01-31 | Multi-mode light adjustment control and constant current driving circuit used for LED lighting |
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| CN 201320061110 CN203151818U (en) | 2013-01-31 | 2013-01-31 | Multi-mode light adjustment control and constant current driving circuit used for LED lighting |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106151894A (en) * | 2016-08-19 | 2016-11-23 | 中节能晶和照明有限公司 | LED light unit |
| CN106195677A (en) * | 2016-08-19 | 2016-12-07 | 中节能晶和照明有限公司 | LED light engine |
| CN106714424A (en) * | 2017-01-09 | 2017-05-24 | 杭州优特电源有限公司 | Multi-control output type DALI signal conversion device |
| CN107770917A (en) * | 2017-11-21 | 2018-03-06 | 苏州晶品新材料股份有限公司 | Adjustable type LED based on audio signal |
-
2013
- 2013-01-31 CN CN 201320061110 patent/CN203151818U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106151894A (en) * | 2016-08-19 | 2016-11-23 | 中节能晶和照明有限公司 | LED light unit |
| CN106195677A (en) * | 2016-08-19 | 2016-12-07 | 中节能晶和照明有限公司 | LED light engine |
| CN106195677B (en) * | 2016-08-19 | 2023-04-25 | 中节能晶和科技有限公司 | LED light engine |
| CN106151894B (en) * | 2016-08-19 | 2023-04-28 | 中节能晶和科技有限公司 | LED optical unit |
| CN106714424A (en) * | 2017-01-09 | 2017-05-24 | 杭州优特电源有限公司 | Multi-control output type DALI signal conversion device |
| CN107770917A (en) * | 2017-11-21 | 2018-03-06 | 苏州晶品新材料股份有限公司 | Adjustable type LED based on audio signal |
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