CN102625538A - Constant current LED (light-emitting diode) signal conditioning circuit - Google Patents
Constant current LED (light-emitting diode) signal conditioning circuit Download PDFInfo
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- CN102625538A CN102625538A CN2012100846001A CN201210084600A CN102625538A CN 102625538 A CN102625538 A CN 102625538A CN 2012100846001 A CN2012100846001 A CN 2012100846001A CN 201210084600 A CN201210084600 A CN 201210084600A CN 102625538 A CN102625538 A CN 102625538A
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Abstract
A constant current LED (light-emitting diode) signal conditioning circuit comprises a signal input module, a linearization conversion module, a current detecting module, a voltage limiting module and an electronic switch module. The constant current LED signal conditioning circuit has a constant current driving function capable of directly driving an LED lamp when the signal input module does not receive dimming voltage from a user, and the signal input module can disconnect the connection with an inner current detecting reference when a dimming signal is received, the dimming signal voltage of 1-10v can be converted into the dimming voltage with good linearity to control the light output of the LED lamp, and accordingly more comfortable and satisfying lighting environment can be provided for the user.
Description
Technical field
The present invention relates to LED driving power field, especially a kind of have a modulate circuit that inner constant current control can receive the external dimmer signal again.
Background technology
Up to now, LED light modulation power supply can be divided into simulation light modulation and digital dimming, and controllable silicon light modulation changes its angle of flow, pollutes electrical network.It is bad that the PWM light modulating frequency is handled, and is easy to generate noise.One has the power supply that receives the external dimmer signal only, and when not having dim signal voltage, power supply is difficult to stable.When the LED power supply that does not have dimming function, receive its external dimmer signal, the linearity is very poor, the scheme relative complex.
Application number is that the patent of invention of CN200910039996.6 provides a kind of Dimmable LED constant-current drive circuit, but this circuit is comparatively complicated, and the cost of manufacture of circuit board is high.
Summary of the invention
The present invention proposes a kind of dim signal, inner signal conditioning circuit that also has constant current control of while of receiving, and said circuit comprises
Signal input module is used to receive the LED power control signal;
The linearisation modular converter is connected with said signal input module, is used for the voltage that said signal input module receives is carried out linearizing processing, converts the dim signal voltage that is complementary with the LED power supply to;
Current detection module is connected with said linearisation modular converter, is used to detect the dim signal input current of said LED power supply;
The pressure limiting module is connected with said signal input module, and the voltage control that is used for said signal input module is transmitted is in certain limit;
Electronic switch module; Be connected with current detection module with said pressure limiting module; Its set inside has electronic switch, and during dim signal in said signal input module receives the certain voltage scope, said electronic switch breaks off and being connected of the interior current detecting reference voltage of LED power supply.
Preferably, said pressure limiting module voltage control that said signal input module is transmitted is in 10V; Simultaneously; Said linearisation modular converter becomes the dim signal voltage that is complementary with power supply with the voltage transitions that said signal (1-10V) input module receives; When said electronic switch module receives the dim signal of 1-10V, start said electronic switch and break off and being connected of the current detecting reference voltage of LED power supply inside.
Circuit structure of the present invention is succinct, is not receiving the user when dimmer voltage is provided, and it has constant-current driving, directly the driving LED lamp; When receiving user's dim signal, disconnection is connected with the internal current detection reference, and with the linear good dimmer voltage of the dim signal voltage transitions of 1-10V, is used to control the light output of LED lamp, for the user provides more comfortable, and satisfied lighting environment.
Description of drawings
Accompanying drawing 1 is that the module of the preferred embodiment of the present invention connects sketch map;
Accompanying drawing 2 is that the circuit of the preferred embodiment of the present invention connects sketch map.
Embodiment
Shown in Figure 1, constant-current LED signal conditioning circuit of the present invention comprises signal input module, linearisation modular converter, current detection module, pressure limiting module and electronic switch module, and wherein signal input module is used to receive the LED power control signal; The linearisation modular converter is connected with said signal input module, is used for the voltage that said signal input module receives is carried out linearizing processing, converts the dim signal voltage that is complementary with the LED power supply to; Current detection module is connected with said linearisation modular converter, is used to detect the dim signal input current of said LED power supply; The pressure limiting module is connected with said signal input module, and the voltage control that is used for said signal input module is transmitted is in certain limit; Electronic switch module is connected with current detection module with said pressure limiting module; Its set inside has electronic switch; During dim signal in said signal input module receives the certain voltage scope, said electronic switch breaks off and being connected of the interior current detecting reference voltage of LED power supply.
Preferred embodiment as shown in Figure 2, the signal input module of this circuit are when receiving the dim signal of 1-10V, and pressure limiting circuit is limited in it in 10V; When said electronic switch module receives the dim signal of 1-10V, start electronic switch immediately and break off and being connected of the inner current detecting reference voltage of LED power supply, control the size of current of LED power supply fully by dim signal, to reach the purpose of light modulation.
In Fig. 2, the pressure limiting module mainly is made up of with voltage stabilizing didoe ZD1 resistance R 25, and said electronic switch comprises that chip U5 is TL431, triode Q1, triode Q2, and some resistance; Said linearisation modular converter comprises high precision operating amplifier OP07 and some resistance composition.When in a single day interface J1 receives the dim signal of 1-10V, triode Q2 elder generation conducting, triode Q1 conducting afterwards; Make the voltage of the control end (G) of chip U5 be higher than 2.5V; Chip U5 conducting is immediately arrived zero with current sample benchmark clamper, thereby has been closed power supply internal current detection ring.After the triode Q1 conducting power supply (VCC) is offered chip U6 after by voltage stabilizing didoe ZD2 voltage stabilizing.Linearisation modular converter by U6 and related device thereof are formed converts input signal to be complementary with the LED power supply signal voltage, and it can the linear size that changes the LED source current, reaches the purpose of the light output of having controlled the LED lamp.
Constant-current LED signal conditioning circuit of the present invention cooperates power supply to use, and can provide a kind of and has not only had constant current control, but also can receive the LED power supply of the signal of light modulation.When signal conditioning circuit of the present invention receives the dimmer voltage signal, carry out pressure limiting control, close the constant current control signal of this power supply simultaneously,, improved the linearity of dimmer voltage, have better dimming effect through the linearisation change-over circuit.The present invention also adopts a diode constant current detection and external dimmer signal that power supply is inner to isolate, and makes the external dimmer signal voltage interference-free.
Last institute should be noted that; Above embodiment is only in order to technical scheme of the present invention to be described but not to the restriction of protection range of the present invention; Although the present invention has been done detailed description with reference to preferred embodiment; Those of ordinary skill in the art should be appreciated that and can make amendment or be equal to replacement technical scheme of the present invention, and do not break away from the essence and the scope of technical scheme of the present invention.
Claims (6)
1. constant-current LED signal conditioning circuit, it is characterized in that: said circuit comprises
Signal input module is used to receive the LED power control signal;
The linearisation modular converter is connected with said signal input module, is used for the voltage that said signal input module receives is carried out linearizing processing, converts the dim signal voltage that is complementary with the LED power supply to;
Current detection module is connected with said linearisation modular converter, is used to detect the dim signal input current of said LED power supply;
The pressure limiting module is connected with said signal input module, and the voltage control that is used for said signal input module is transmitted is in certain limit;
Electronic switch module; Be connected with current detection module with said pressure limiting module; Its set inside has electronic switch, and during dim signal in said signal input module receives the certain voltage scope, said electronic switch breaks off and being connected of the interior current detecting reference voltage of LED power supply.
2. constant-current LED signal conditioning circuit as claimed in claim 1 is characterized in that: the voltage control that said pressure limiting module is transmitted said signal input module is in 10V.
3. constant-current LED signal conditioning circuit as claimed in claim 1 is characterized in that: the voltage transitions that said linearisation modular converter receives said signal input module becomes the dim signal voltage of 1-10V.
4. constant-current LED signal conditioning circuit as claimed in claim 1 is characterized in that: when said electronic switch module receives the dim signal of 1-10V, start said electronic switch and break off and being connected of said LED power supply.
5. constant-current LED signal conditioning circuit as claimed in claim 1 is characterized in that: said electronic switch comprises chip TL431.
6. constant-current LED signal conditioning circuit as claimed in claim 1 is characterized in that: said linearisation modular converter comprises high precision operating amplifier OP07.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210084600.1A CN102625538B (en) | 2012-03-27 | 2012-03-27 | Constant current LED (light-emitting diode) signal conditioning circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210084600.1A CN102625538B (en) | 2012-03-27 | 2012-03-27 | Constant current LED (light-emitting diode) signal conditioning circuit |
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| Publication Number | Publication Date |
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| CN102625538A true CN102625538A (en) | 2012-08-01 |
| CN102625538B CN102625538B (en) | 2014-09-03 |
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| CN201210084600.1A Active CN102625538B (en) | 2012-03-27 | 2012-03-27 | Constant current LED (light-emitting diode) signal conditioning circuit |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103108462A (en) * | 2013-01-25 | 2013-05-15 | 深圳麦格米特电气股份有限公司 | Dimming method of light emitting diode (LED) street lamp |
| CN103209531A (en) * | 2013-04-28 | 2013-07-17 | 宁波赛耐比光电有限公司 | LED (Light Emitting Diode) dimming control circuit |
| CN104470149A (en) * | 2014-12-25 | 2015-03-25 | 东莞卫光电子科技有限公司 | Dimming circuit suitable for multiple dimming modes |
| CN108366465A (en) * | 2018-04-24 | 2018-08-03 | 华域视觉科技(上海)有限公司 | A kind of control circuit for light source and lighting device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201601863U (en) * | 2009-11-13 | 2010-10-06 | 冯俊 | LED lamp with dimming detection circuit |
| CN101932175A (en) * | 2010-08-31 | 2010-12-29 | 电子科技大学 | LED constant current driving circuit capable of dimming automatically |
| US20110080110A1 (en) * | 2009-10-07 | 2011-04-07 | Lutron Electronics Co., Inc. | Load control device for a light-emitting diode light source |
-
2012
- 2012-03-27 CN CN201210084600.1A patent/CN102625538B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110080110A1 (en) * | 2009-10-07 | 2011-04-07 | Lutron Electronics Co., Inc. | Load control device for a light-emitting diode light source |
| CN201601863U (en) * | 2009-11-13 | 2010-10-06 | 冯俊 | LED lamp with dimming detection circuit |
| CN101932175A (en) * | 2010-08-31 | 2010-12-29 | 电子科技大学 | LED constant current driving circuit capable of dimming automatically |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103108462A (en) * | 2013-01-25 | 2013-05-15 | 深圳麦格米特电气股份有限公司 | Dimming method of light emitting diode (LED) street lamp |
| CN103209531A (en) * | 2013-04-28 | 2013-07-17 | 宁波赛耐比光电有限公司 | LED (Light Emitting Diode) dimming control circuit |
| CN103209531B (en) * | 2013-04-28 | 2014-11-26 | 宁波赛耐比光电有限公司 | LED (Light Emitting Diode) dimming control circuit |
| CN104470149A (en) * | 2014-12-25 | 2015-03-25 | 东莞卫光电子科技有限公司 | Dimming circuit suitable for multiple dimming modes |
| CN108366465A (en) * | 2018-04-24 | 2018-08-03 | 华域视觉科技(上海)有限公司 | A kind of control circuit for light source and lighting device |
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|---|---|
| CN102625538B (en) | 2014-09-03 |
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Address after: 528000, Guangdong City, Foshan Province Nanhai District lion town Shishan science and Technology Industrial Park A District Science and technology Avenue East 39 (workshop A) on the third floor Applicant after: Guangdong Kegu Power Co., Ltd. Address before: 4, building 39, block F, No. 528000 east science Road, Shishan science and Technology Industrial Zone, Nanhai District, Foshan, Guangdong, Applicant before: Foshan Kegu Power Electronics Co., Ltd. |
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Address after: 528000, Guangdong City, Foshan Province Nanhai District lion town Shishan science and Technology Industrial Park A District Science and technology Avenue East 39 (workshop A) on the third floor Patentee after: GUANGDONG KEGU POWER ELECTRONICS CO., LTD. Address before: 528000, Guangdong City, Foshan Province Nanhai District lion town Shishan science and Technology Industrial Park A District Science and technology Avenue East 39 (workshop A) on the third floor Patentee before: Guangdong Kegu Power Co., Ltd. |