CN203840584U - LED drive circuit and LED light fixture - Google Patents
LED drive circuit and LED light fixture Download PDFInfo
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- CN203840584U CN203840584U CN201420027093.2U CN201420027093U CN203840584U CN 203840584 U CN203840584 U CN 203840584U CN 201420027093 U CN201420027093 U CN 201420027093U CN 203840584 U CN203840584 U CN 203840584U
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Abstract
The utility model belongs to the illumination technical field and especially relates to an LED drive circuit and an LED light fixture. The LED drive circuit comprises an anti-electromagnetic interference module, a rectifying and filtering module, a boost module and a constant current module. The rectifying and filtering module is connected with the anti-electromagnetic interference module and the boost module. The boost module and the constant current module are respectively connected with an LED module group. The anti-electromagnetic interference module is used for filtering interference signals in accessed AC commercial power. The AC commercial power is further converted into a direct current through the rectifying and filtering module. Power factor correction and boost processing are further performed on the direct current through the boost module. The current is then stabilized through the constant current module. The current voltage is further adjusted so that the LED module group can be driven to work. By adopting power factor correction and constant current processing, the LED drive circuit can make ripple currents thoroughly eliminated. The stroboscopic phenomenon of the LED module group can be further eliminated. When the LED drive circuit is applied to the LED light fixture, high-frequency electromagnetic wave radiation generated by a conventional non-stroboscopic light fixture can be further eliminated.
Description
Technical field
The utility model belongs to lighting technical field, particularly a kind of LED drive circuit and LED light fixture.
Background technology
Traditional fluorescent lighting fixture, generally with stroboscopic, affects illuminating effect.Technical staff, in order to solve stroboscopic problem, has adopted high-frequency electronic ballast, and stroboscopic frequency is brought up to 30,000 to 50,000 times.This way makes naked eyes, and even apparatus for making a video recording stroboscopic of imperceptible light fixture all, has good illuminating effect.
Yet, when the stroboscopic frequency of light fixture is improved, also make light fixture produce " high-frequency electromagnetic wave excitation ".And stroboscopic frequency is higher, the high frequency electromagnetic radiation discharging during its work is stronger.And high-frequency electromagnetic wave excitation can impact cerebral nerve.User uses after such light fixture long-time, tends to occur having a dizzy spell, and weak symptom tired out from head to foot, even brain sustains damage.Especially for just developmental teenager, also can affect its eyesight.
In sum, the existing problem that can produce high-frequency electromagnetic wave excitation that exists without stroboflash lamp set.
Utility model content
The purpose of this utility model is to provide a kind of LED drive circuit, is intended to solve the existing problem that can produce high-frequency electromagnetic wave excitation without stroboflash lamp set existence.
The utility model is to realize like this, a kind of LED drive circuit, be connected with LED module, comprise anti-electromagnetic interference module and rectification filtering module, the input incoming transport civil power of described anti-electromagnetic interference module, the output of described anti-electromagnetic interference module connects the input of described rectification filtering module;
Described LED drive circuit also comprises boost module and constant flow module;
The input of described boost module connects the output of described rectification filtering module, and the output of described boost module connects the input of described LED module;
The input of described constant flow module connects the output of described LED module, and the control end of described constant flow module connects the output of described boost module.
Another object of the present utility model is also to provide a kind of LED light fixture, comprises LED module, also comprises above-mentioned LED drive circuit.
LED drive circuit provided by the utility model comprises anti-electromagnetic interference module, rectification filtering module, boost module and constant flow module; Wherein, anti-electromagnetic interference module incoming transport civil power also connects rectification filtering module, and rectification filtering module connects boost module, and boost module is connected respectively LED module with constant flow module.Interference signal in the electric main being accessed by the filtering of anti-electromagnetic interference module, then by rectification filtering module, its further rectification is treated to direct current.By boost module, direct current is carried out to power factor correction and the processing of boosting, then by the size of current of constant flow module stable DC electricity, and adjust galvanic voltage with the work of driving LED module.Owing to having adopted power factor correction and constant current to process, thoroughly eliminated ripple current, also eliminated the stroboscopic of LED module.Meanwhile, this circuit application, in LED light fixture, more can be eliminated to the high-frequency electromagnetic wave excitation that tradition produces by improving stroboscopic frequency without stroboflash lamp set.
Accompanying drawing explanation
Fig. 1 is the modular structure figure of the LED drive circuit that provides of the utility model the first embodiment;
Fig. 2 is the exemplary circuit structure chart of the LED drive circuit that provides of the utility model the first embodiment.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
LED drive circuit provided by the utility model comprises anti-electromagnetic interference module, rectification filtering module, boost module and constant flow module; Wherein, anti-electromagnetic interference module incoming transport civil power also connects rectification filtering module, and rectification filtering module connects boost module, and boost module is connected respectively LED module with constant flow module.Solved the existing problem that can produce high-frequency electromagnetic wave excitation without stroboflash lamp set existence.
Fig. 1 shows the modular structure of the LED drive circuit that the utility model embodiment provides, and for convenience of explanation, only shows the part relevant to the utility model embodiment, and details are as follows:
The LED drive circuit that the utility model embodiment provides can be connected with LED module 50.
In the present embodiment, LED module 50 can be the light emitting source being combined by a plurality of LED lamps, and it adopts direct current as operating current.
Further, this LED drive circuit can comprise anti-electromagnetic interference module 10 and rectification filtering module 20.
Concrete, the input incoming transport civil power of anti-electromagnetic interference module 10, the output of anti-electromagnetic interference module 10 connects the input of rectification filtering module 20;
In the present embodiment, anti-electromagnetic interference module 10 can adopt conventional electromagnetic interface filter, and its effect is the current signal access arrangement that allows predeterminated frequency, and the disturbance current signal of high frequency is had to larger inhibition.Rectification filtering module 20 is done rectifying and wave-filtering to electric main and is processed, and is converted into the direct current of pulsation.
Further, LED drive circuit can also comprise boost module 30 and constant flow module 40.
Concrete, the input of boost module 30 connects the output of rectification filtering module 20, and the output of boost module 30 connects the input of LED module 50;
The input of constant flow module 40 connects the output of LED module 50, and the control end of constant flow module 40 connects the output of boost module 30.
In the present embodiment, boost module 30 is mainly that direct current is carried out power factor correction and boosts processing, and it can boost to 400V by DC voltage.The size of current of 40 stable DC electricity of constant flow module.And adjust galvanic voltage according to the quantity of LED lamp in LED module 50, to adapt to the work requirements of LED module 50.
Further, LED drive circuit can also comprise overload protection module 60;
Concrete, the input of anti-electromagnetic interference module 10 comprises first input end and the second input;
The output of overload protection module 60 connects first input end, and the input of overload protection module 60 and the second input are connected respectively live wire L and the zero line N of AC network.
In the present embodiment, overload protection module 60 can break down or access excessive load and when electric current is excessive in causing circuit, disconnect in time the power supply of LED drive circuit at LED drive circuit, avoids circuit to occur the phenomenon of overheated even catching fire.
In the present embodiment, owing to having adopted power factor correction and constant current to process, thoroughly eliminate ripple current, also eliminated the stroboscopic of LED module 50., owing to not improving the stroboscopic frequency of LED module 50, directly stroboscopic is eliminated on the contrary meanwhile, made whole LED drive circuit and LED module 50 can not produce high frequency electromagnetic radiation.
As the utility model one embodiment, as shown in Figure 2, boost module 30 can comprise:
The first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5, the 6th resistance R 6, the 3rd capacitor C 3, the 4th capacitor C 4, transformer T1, the first diode D1, NMOS pipe Q1 and the chip U1 that boosts;
Transformer T1 comprises armature winding and secondary winding;
First first end of resistance R 1 and the first end of armature winding connect the input that forms boost module 30 altogether, the second end of the first resistance R 1 connects the first end of the second resistance R 2, the second end of the second resistance R 2, the 3rd first end of capacitor C 3 and the first end of secondary winding are connected to the power end VDD of the chip U1 that boosts altogether, the drain electrode of the second end of armature winding and NMOS pipe Q1 is connected to the anode of the first diode D1 altogether, the grid of NMOS pipe Q1 connects the output OUT of the chip U1 that boosts, the source electrode of NMOS pipe Q1, the first end of the first end of the 3rd resistance R 3 and the 4th resistance R 4 is connected to the current detecting end CS of the chip U1 that boosts altogether, the negative electrode of the first diode D1, the positive pole of the first end of the 5th resistance R 5 and the 4th capacitor C 4 connects the output that forms boost module 30 altogether, the second end of the 5th resistance R 5 and the first end of the 6th resistance R 6 are connected to the voltage detecting end INV of the chip U1 that boosts altogether, the second end of secondary winding, the second end of the 3rd capacitor C 3, the negative pole of the 4th capacitor C 4, the second end of the 3rd resistance R 3, the second end of the 4th resistance R 4, the earth terminal GND of the second end of the 6th resistance R 6 and the chip U1 that boosts is connected to ground altogether.
In the present embodiment, the boost model of chip U1 can be SA7527.Wherein, transformer T1, NMOS pipe Q1, the first diode D1, the 3rd resistance R 3, the 4th resistance R 4 and the 4th capacitor C 4 form booster circuit, carry out power factor correction, the DC voltage of input are boosted to 400V simultaneously.
As the utility model one embodiment, as shown in Figure 2, constant flow module 40 can comprise:
The 7th resistance R 7, the 8th resistance R 8, the 9th resistance R 9, the tenth resistance R the 10, the 11 resistance R 11, the 5th capacitor C 5, the 6th capacitor C 6, the second diode D2, inductance L 2 and constant current chip U2;
The first end of the 7th resistance R 7, the negative electrode of the second diode D2, the first end anodal and the 11 resistance R 11 of the 6th capacitor C 6 connects the controlled end that forms constant flow module 40 altogether, the second end of the 7th resistance R 7 connects the first end of the 8th resistance R 8, the second end of the 8th resistance R 8 and the first end of the 5th capacitor C 5 are connected to the power end VCC of constant current chip U2 altogether, the first end of the anode of the second diode D2 and inductance L 2 is connected to the input DRAIN of constant current chip U1 altogether, the negative pole of the 6th capacitor C 6, the second end of the 11 resistance R 11 and the second end of inductance L 2 connect the input that forms constant flow module 40 altogether, the first end of the first end of the 9th resistance R 9 and the tenth resistance R 10 is connected to the test side CS of constant current chip U2 altogether, the second end of the 5th capacitor C 5, the second end of the 9th resistance R 9, the second end of the tenth resistance R 10 and the earth terminal GND of constant current chip U2 are connected to ground altogether.
In the present embodiment, the model of constant current chip U2 can be BP2831A.Wherein, the 6th capacitor C the 6, the 11 resistance R 11, inductance L 2, the 9th resistance R 9 and the tenth resistance R 10 are step-down constant-current circuit, and this circuit can be adjusted galvanic voltage automatically, makes it be adapted to the need of work of LED module 50.
As the utility model one embodiment, as shown in Figure 2, anti-electromagnetic interference module 10 comprises common mode inductance L1 and the first capacitor C 1;
Common mode inductance L1 comprises the first coil and the second coil;
The first end of the first end of the first coil and the second coil forms the input of anti-electromagnetic interference module 10, the second end of the first coil and the first end of the first capacitor C 1 connect the first output of the input that forms anti-electromagnetic interference module 10 altogether, the second end of the second end of the second coil and the first capacitor C 1 connects the second output of the input that forms anti-electromagnetic interference module 10 altogether, and the first output of the input of anti-electromagnetic interference module 10 and the second output form the output of anti-electromagnetic interference module 10.
As the utility model one embodiment, as shown in Figure 2, rectification filtering module 20 can comprise rectifier bridge BD1 and the second capacitor C 2;
First of rectifier bridge BD1 exchanges end and exchanges the input that end forms rectification filtering module 20 with second, the first end of the output of rectifier bridge BD1 and the second capacitor C 2 connects the output that forms rectification filtering module 20 altogether, and the second end of the earth terminal of rectifier bridge and the second capacitor C 2 is connected to ground altogether.
As the utility model one embodiment, as shown in Figure 2, overload protection module 60 can be fuse F1;
The first end of fuse F1 and the second end are respectively input and the outputs of overload protection module 60.
As another embodiment of the utility model, overload protection module 60 can also be the air switch that singly enters singly to go out;
The first end of air switch and the second end are respectively input and the outputs of overload protection module 60.
Another object of the utility model embodiment is also to provide a kind of LED light fixture, comprises LED module 50, also comprises above-mentioned LED drive circuit.
In the present embodiment, this LED light fixture can be desk lamp, standard lamp, wall lamp or pendent lamp etc.Due to this LED drive circuit is applied in LED light fixture, eliminated traditional high-frequency electromagnetic wave excitation producing by improving stroboscopic frequency without stroboflash lamp set, guaranteed that user's is healthy.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection range of the present utility model.
Claims (6)
1. a LED drive circuit, be connected with LED module, comprise anti-electromagnetic interference module and rectification filtering module, the input incoming transport civil power of described anti-electromagnetic interference module, the output of described anti-electromagnetic interference module connects the input of described rectification filtering module; It is characterized in that:
Described LED drive circuit also comprises boost module and constant flow module;
The input of described boost module connects the output of described rectification filtering module, and the output of described boost module connects the input of described LED module;
The input of described constant flow module connects the output of described LED module, and the control end of described constant flow module connects the output of described boost module.
2. LED drive circuit as claimed in claim 1, is characterized in that, described LED drive circuit also comprises overload protection module;
The input of described anti-electromagnetic interference module comprises first input end and the second input;
The output of described overload protection module connects described first input end, and the input of described overload protection module and described the second input are connected respectively live wire and the zero line of AC network.
3. LED drive circuit as claimed in claim 1, is characterized in that, described boost module comprises:
The first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance, the 3rd electric capacity, the 4th electric capacity, transformer, the first diode, NMOS pipe and the chip that boosts;
Described transformer comprises armature winding and secondary winding;
The first end of described the first resistance and the first end of described armature winding connect the input that forms described boost module altogether, the second end of described the first resistance connects the first end of described the second resistance, the second end of described the second resistance, the power end of chip boosts described in described the 3rd first end of electric capacity and the first end of described secondary winding are connected to altogether, the second end of described armature winding and the drain electrode of described NMOS pipe are connected to the anode of described the first diode altogether, the output of chip boosts described in the grid of described NMOS pipe connects, the source electrode of described NMOS pipe, the current detecting end of chip boosts described in the first end of the first end of described the 3rd resistance and described the 4th resistance is connected to altogether, the negative electrode of described the first diode, the positive pole of the first end of described the 5th resistance and described the 4th electric capacity connects the output that forms described boost module altogether, the voltage detecting end of chip boosts described in the second end of described the 5th resistance and the first end of described the 6th resistance are connected to altogether, the second end of described secondary winding, the second end of described the 3rd electric capacity, the negative pole of described the 4th electric capacity, the second end of described the 3rd resistance, the second end of described the 4th resistance, the second end of described the 6th resistance and described in the boost earth terminal of chip be connected to ground altogether.
4. LED drive circuit as claimed in claim 1, is characterized in that, described constant flow module comprises:
The 7th resistance, the 8th resistance, the 9th resistance, the tenth resistance, the 11 resistance, the 5th electric capacity, the 6th electric capacity, the second diode, inductance and constant current chip;
The first end of described the 7th resistance, the negative electrode of described the second diode, the first end anodal and described the 11 resistance of described the 6th electric capacity connects the controlled end that forms described constant flow module altogether, the second end of described the 7th resistance connects the first end of described the 8th resistance, the second end of described the 8th resistance and the first end of described the 5th electric capacity are connected to the power end of described constant current chip altogether, the anode of described the second diode and the first end of described inductance are connected to the input of described constant current chip altogether, the negative pole of described the 6th electric capacity, the second end of described the 11 resistance and the second end of described inductance connect the input that forms described constant flow module altogether, the first end of the first end of described the 9th resistance and described the tenth resistance is connected to the test side of described constant current chip altogether, the second end of described the 5th electric capacity, the second end of described the 9th resistance, the second end of described the tenth resistance and the earth terminal of described constant current chip are connected to ground altogether.
5. LED drive circuit as claimed in claim 1, is characterized in that, described anti-electromagnetic interference module comprises common mode inductance and the first electric capacity;
Described common mode inductance comprises the first coil and the second coil;
The first end of the first end of described the first coil and described the second coil forms the input of described anti-electromagnetic interference module, the second end of described the first coil and the first end of described the first electric capacity connect the first output of the input that forms described anti-electromagnetic interference module altogether, the second end of described the second coil and the second end of described the first electric capacity connect the second output of the input that forms described anti-electromagnetic interference module altogether, and the first output of the input of described anti-electromagnetic interference module and the second output form the output of described anti-electromagnetic interference module.
6. a LED light fixture, comprises LED module, it is characterized in that, described LED light fixture also comprises the LED drive circuit as described in claim 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420027093.2U CN203840584U (en) | 2014-01-16 | 2014-01-16 | LED drive circuit and LED light fixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420027093.2U CN203840584U (en) | 2014-01-16 | 2014-01-16 | LED drive circuit and LED light fixture |
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| Publication Number | Publication Date |
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| CN203840584U true CN203840584U (en) | 2014-09-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420027093.2U Expired - Fee Related CN203840584U (en) | 2014-01-16 | 2014-01-16 | LED drive circuit and LED light fixture |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105636287A (en) * | 2014-10-28 | 2016-06-01 | 帝奥微电子有限公司 | Driving circuit with ripple current elimination and power consumption reducing |
| CN108055733A (en) * | 2017-12-29 | 2018-05-18 | 深圳市华星光电技术有限公司 | A kind of driving circuit and lighting system |
| CN109640461A (en) * | 2019-02-20 | 2019-04-16 | 广东励晶智能照明有限公司 | LED drive circuit and headlamp |
| CN110519888A (en) * | 2019-09-03 | 2019-11-29 | 深圳市纳泽光电有限公司 | A kind of LED drive circuit |
| CN111935875A (en) * | 2020-09-16 | 2020-11-13 | 海洋王照明科技股份有限公司 | LED lamp drive circuit and prevent stroboscopic intelligence lamps and lanterns |
| CN112804794A (en) * | 2021-03-30 | 2021-05-14 | 广州市依歌智能科技有限公司 | Thing networking lighting control device and system |
-
2014
- 2014-01-16 CN CN201420027093.2U patent/CN203840584U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105636287A (en) * | 2014-10-28 | 2016-06-01 | 帝奥微电子有限公司 | Driving circuit with ripple current elimination and power consumption reducing |
| CN105636287B (en) * | 2014-10-28 | 2018-09-18 | 帝奥微电子有限公司 | The driving circuit of power consumption is eliminated and reduced with ripple current |
| CN108055733A (en) * | 2017-12-29 | 2018-05-18 | 深圳市华星光电技术有限公司 | A kind of driving circuit and lighting system |
| CN109640461A (en) * | 2019-02-20 | 2019-04-16 | 广东励晶智能照明有限公司 | LED drive circuit and headlamp |
| CN109640461B (en) * | 2019-02-20 | 2024-04-23 | 广东励晶智能照明有限公司 | LED driving circuit and lighting lamp |
| CN110519888A (en) * | 2019-09-03 | 2019-11-29 | 深圳市纳泽光电有限公司 | A kind of LED drive circuit |
| CN111935875A (en) * | 2020-09-16 | 2020-11-13 | 海洋王照明科技股份有限公司 | LED lamp drive circuit and prevent stroboscopic intelligence lamps and lanterns |
| CN111935875B (en) * | 2020-09-16 | 2023-06-13 | 海洋王照明科技股份有限公司 | LED lamp driving circuit and anti-stroboscopic intelligent lamp |
| CN112804794A (en) * | 2021-03-30 | 2021-05-14 | 广州市依歌智能科技有限公司 | Thing networking lighting control device and system |
| CN112804794B (en) * | 2021-03-30 | 2021-09-07 | 广州市依歌智能科技有限公司 | Thing networking lighting control device and system |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140917 Termination date: 20160116 |
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| EXPY | Termination of patent right or utility model |