CN205754955U - A kind of LED drive circuit of electromagnetism interference - Google Patents
A kind of LED drive circuit of electromagnetism interference Download PDFInfo
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- CN205754955U CN205754955U CN201620467279.9U CN201620467279U CN205754955U CN 205754955 U CN205754955 U CN 205754955U CN 201620467279 U CN201620467279 U CN 201620467279U CN 205754955 U CN205754955 U CN 205754955U
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Abstract
This utility model relates to the LED drive circuit of a kind of electromagnetism interference, including rectification module, EMC immunity module and constant flow module, described EMC immunity module includes common mode filtering submodule and differential mode filtering submodule, the input incoming transport civil power of described common mode filtering submodule, the outfan of common mode filtering submodule connects the input of rectification module, the outfan of rectification module connects the input of differential mode filtering submodule, and the outfan of differential mode filtering submodule connects the input of constant flow module；The outfan of constant flow module connects LED module.This LED drive circuit eliminates electromagnetic interference by EMC immunity module, it is ensured that LED module can the work of normal table ground.
Description
Technical field
This utility model belongs to technical field of LED illumination, is specifically related to the LED drive circuit of a kind of electromagnetism interference.
Background technology
Along with science and technology development, people to life comfortableness require more and more higher, diversified high-power electric appliance and
Smart Home continues to bring out in modern house as household electrical appliances, and people have been not only limited to switch to the control of household electrical appliances, but logical
Cross control home electronics server remotely to control.Water heater such as domestic is controlled by mobile phone, very easy to use.So
And controlling these white goods when, electromagnetic interference can be produced, thus affect the normal work that family's LED illumination device drives
Make, it is therefore desirable to a kind of the LED drive circuit of electromagnetism interference can guarantee the normal work of LED illumination device.
Summary of the invention
The purpose of this utility model is to provide the LED drive circuit of a kind of electromagnetism interference, by arrange in circuit
EMC immunity module eliminates the impact that LED illumination is driven by electromagnetic interference produced by white goods, it is ensured that LED illumination sets
Standby normal work.
To achieve these goals, the technical solution adopted in the utility model is, the LED of a kind of electromagnetism interference drives electricity
Road, including rectification module, EMC immunity module and constant flow module, described EMC immunity module include common mode filtering submodule and
Differential mode filtering submodule, the input incoming transport civil power of described common mode filtering submodule, the outfan of common mode filtering submodule
Connecting the input of rectification module, the outfan of rectification module connects the input of differential mode filtering submodule, differential mode filtering submodule
The outfan of block connects the input of constant flow module；The outfan of constant flow module connects LED module.
A kind of improving as of the present utility model, described constant flow module includes that constant current submodule, spike eliminate submodule, defeated
Going out separaant module and output filtering submodule, the input of described constant current submodule connects the output of differential mode filtering submodule
End, described spike eliminates the outfan of the input connection differential mode filtering submodule of submodule, described output separaant module
Input connects spike and eliminates submodule and the outfan of constant current submodule, and the outfan of output separaant module connects output filter
The input of marble module, the outfan of output filtering submodule connects LED module.
As a kind of improvement of the present utility model, described LED drive circuit also includes overload protection module, described overload
The input of protection module connects live wire and the zero line of electric main, and the outfan of described overload protection module connects common mode filtering
The input of submodule.
A kind of improve as of the present utility model, described common mode filtering submodule include common mode inductance, an X electric capacity and
2nd X electric capacity, described differential mode filtering submodule includes differential mode inductance, the first resistance and the first electric capacity, and described rectification module uses
Rectifier bridge realizes, and described common mode inductance includes first coil and the second coil, and an X capacitance series is at the first end of first coil
And second coil the first end between, the 2nd X capacitance series between second end and the second end of the second coil of first coil,
And second coil first end connect rectifier bridge first exchange end, the second coil second end connect rectifier bridge second exchange
End；First exchange end and second exchange end composition rectifier bridge input, the outfan of rectifier bridge include positive voltage output end and
Negative voltage outfan, one end of described differential mode inductance connects the positive voltage output end of rectifier bridge, and the other end is connected serially to the first electric capacity
One end, the other end ground connection of the first electric capacity, described first resistor coupled in parallel is connected to the two ends of differential mode inductance.
As a kind of improvement of the present utility model, described overload protection module includes electric fuse and varistor, described guarantor
One end of danger silk connects the live wire of electric main, the first end of other end concatenation to varistor, and the second end of varistor is even
Connect the zero line of electric main；A described X electric capacity is connected in parallel between the first end of varistor and the second end.
Relative to prior art, this utility model disappears by arranging rectification module, EMC immunity module and constant flow module
The electromagnetic interference influence produced LED illumination device except white goods, wherein, electric main is filtered by common mode filtering submodule
Interference signal therein, then by rectifier bridge, glitch-free electric main rectification is processed as unidirectional current, unidirectional current is further simultaneously
Eliminated by differential mode filtering submodule and disturb produced by rectification；Power is carried out by constant flow module through eliminating the unidirectional current of interference
After factor correcting and voltage increase and current constant process, it is suitable for the driving voltage of LED module work by output separaant module isolation and amplifier.
Additionally, due to have employed spike elimination submodule to completely eliminate ripple current when isolation and amplifier with output filtering submodule,
Also eliminate the stroboscopic phenomenon of LED module.
Accompanying drawing explanation
Fig. 1 is schematic block circuit diagram of the present utility model.
Fig. 2 is the circuit theory diagrams of this utility model embodiment.
Detailed description of the invention
In order to deepen understanding and cognition of the present utility model, this utility model is made by below in conjunction with the accompanying drawings with one embodiment
Further describe and introduce.
As it is shown in figure 1, the LED drive circuit of a kind of electromagnetism interference, can be connected with LED module, described LED module
The illumination light-emitting equipment that can be combined by multiple LED.Described LED drive circuit includes the anti-interference mould of rectification module, EMC
Block and constant flow module, described EMC immunity module includes common mode filtering submodule and differential mode filtering submodule, described common mode filtering
The input incoming transport civil power of submodule, the outfan of common mode filtering submodule connects the input of rectification module, rectification mould
The outfan of block connects the input of differential mode filtering submodule, and the outfan of differential mode filtering submodule connects the input of constant flow module
End；The outfan of constant flow module connects LED module.
Specifically, described constant flow module includes that constant current submodule, spike eliminate submodule, output separaant module and output
Filtering submodule, the input of described constant current submodule connects the outfan of differential mode filtering submodule, and described spike eliminates submodule
The input of block connects the outfan of differential mode filtering submodule, and the input of described output separaant module connects spike and eliminates son
Module and the outfan of constant current submodule, the outfan of output separaant module connects the input of output filtering submodule, defeated
The outfan going out to filter submodule connects LED module.
It addition, this LED drive circuit also includes overload protection module, the input of described overload protection module connects exchange
The live wire of civil power and zero line, the outfan of described overload protection module connects the input of common mode filtering submodule.
As in figure 2 it is shown, give one concrete can the LED drive circuit embodiment of electromagnetism interference, at the present embodiment
In, described common mode filtering submodule includes common mode inductance L1, an X electric capacity CX1 and the 2nd X electric capacity CX2, described differential mode filtering
Module includes differential mode inductance L2, the first resistance R1 and the first electric capacity C1, and described rectification module uses rectifier bridge BD1 to realize.Described
Common mode inductance L1 includes that first coil and the second coil, an X electric capacity CX1 are serially connected in the first end and second coil of first coil
The first end between, the 2nd X electric capacity CX2 is serially connected between the second end of first coil and the second end of the second coil, and second
First end of coil connects the first exchange end of rectifier bridge BD1, and the second end of the second coil connects second exchange of rectifier bridge BD1
End.First exchange end and the input of the second exchange end composition rectifier bridge BD1, the outfan of rectifier bridge BD1 includes that positive voltage is defeated
Go out end and negative voltage outfan.One end of described differential mode inductance L2 connects the positive voltage output end of rectifier bridge BD1, and the other end is connected
To one end of the first electric capacity C1, the other end ground connection of the first electric capacity C1, described first resistance R1 is connected in differential mode inductance L2 in parallel
Two ends.The EMC immunity module being made up of described common mode filtering submodule and differential mode filtering submodule can allow to preset frequency
The current signal of rate enters LED module, and high frequency disturbs current signal have bigger inhibition.
Described overload protection module includes that one end of electric fuse F1 and varistor ZR1, described electric fuse F1 connects exchange
The live wire of civil power, the first end of other end concatenation to varistor ZR1, second end of varistor ZR1 connects electric main
Zero line.A described X electric capacity CX1 is connected in parallel between first end of varistor ZR1 and the second end.Under normal circumstances,
Varistor ZR1 is high-impedance state, can present short-circuit condition after exceeding its threshold value, and then between N/L, electric fuse is burnt in short circuit
F1, to play the effect protecting the most each submodular circuits.
Described output separaant module uses three winding isolating transformer T1, described three winding isolating transformer T1 to include the
One armature winding, the second armature winding and secondary windings, described first armature winding connects described spike and eliminates the defeated of submodule
Going out end, the second armature winding connects the outfan of constant current submodule, and the Same Name of Ends of described secondary windings connects output filtering submodule
Input one end of block, non-same polarity connects the other end of output filtering submodule input.
Described constant current submodule include BP3319M constant current chip U1, the second resistance R2, the 3rd resistance R3, the 4th resistance R4,
5th resistance R5, the 8th resistance R8, the 9th resistance R9, the tenth resistance R10, the 11st resistance R11, the 12nd resistance R12, the tenth
Three resistance R13, the first diode D1, the 3rd diode D3, MOS switch pipe Q1, the 3rd electric capacity C3 and the first filter capacitor CE1,
One end of described second resistance R2 connects the GATE pin of BP3319M constant current chip U1, and the other end connects the grid of MOS switch pipe Q1
Pole, an end of the 3rd resistance R3 is connected between the second resistance R2 and MOS switch pipe Q1 grid, and the other end connects BP3319M constant current
The CS pin of chip U1, is connected to differential mode inductance L2 by that end of the 4th resistance R4 after the 4th resistance R4 and the 5th resistance R5 concatenation
With the VCC pin that between the first electric capacity C1 and that end of the 5th resistance R5 is connected BP3319M constant current chip U1, the 8th resistance
One end of R8 connects the VCC pin of BP3319M constant current chip U1, and the other end connects the negative pole of the 3rd diode D3, the 9th resistance
One end of R9 connects the positive pole of the 3rd diode D3, and the other end connects the VCC pin of BP3319M constant current chip U1, and the tenth to the
After 12 resistance R12 are in parallel, one end connects the source electrode of MOS switch pipe Q1, and other end ground connection, one end of the 13rd resistance R13 is even
Connect the FB pin of BP3319M constant current chip U1, other end ground connection；One end of 3rd electric capacity C3 connects BP3319M constant current chip U1
COM pin, other end ground connection, the first diode D1 and the second resistance R2 is connected in parallel, and the positive pole of the second diode D2 connects
The drain electrode of MOS switch pipe Q1, the drain electrode of MOS switch pipe Q1 connects the of the same name of first armature winding of three winding isolating transformer T1
End, one end of the 9th resistance R9 connects the Same Name of Ends of second armature winding of three winding isolating transformer T1, in BP3319M constant current
It is connected between the VCC pin of chip U1 and ground and has the first filter capacitor CE1.MOS switch pipe Q1 in constant current submodule be for
Control output frequency, described ten, the 11 and 12 resistance constitute current sample end, the 9th resistance R9 and the 13rd resistance R13
For current-limiting resistance, play the effect of overvoltage protection.
Described spike eliminates submodule and includes the 6th resistance R6, the 7th resistance R7, the 4th electric capacity C4 and the second diode D2,
After 6th resistance R6 and the 7th resistance R7 concatenation that end of the 6th resistance R6 is connected to differential mode inductance L2 and the first electric capacity C1 it
Between and that end of the 7th resistance R7 is connected the negative pole of the second diode D2, the 4th electric capacity C4 and the 6th resistance R6 parallel connection even
Connect.
Described output filtering submodule includes the 14th resistance R14, the 15th resistance R15, the 5th electric capacity C5, the four or two pole
Pipe D4, the second filter capacitor CE2, the 3rd filter capacitor CE3 and the 4th inductance L4, described 14th resistance R14 and the 5th electric capacity
C5 is connected in parallel with the 4th diode D4 after first concatenating, and the positive pole of the 4th diode D4 connects the secondary of three winding isolating transformer T1
The Same Name of Ends of level winding, the negative pole of the 4th diode D4 is serially connected with the second filter capacitor CE2 and the 3rd filter capacitor CE3, and second
Filter capacitor CE2 and the 3rd filter capacitor CE3 is connected in parallel, and is connected in parallel the 15th electricity at the two ends of the second filter capacitor CE2
Resistance R15, at the two ends of the 3rd filter capacitor CE3 and meet the 4th inductance L4, described 4th inductance L4 and LED module is connected.Described
Second filter capacitor CE2 and the 3rd filter capacitor CE3 can eliminate the interference signal in output voltage further.
Technological means disclosed in this utility model scheme is not limited only to the technological means disclosed in above-mentioned embodiment, also
Including the technical scheme being made up of above technical characteristic combination in any.It should be pointed out that, the ordinary skill for the art
For personnel, on the premise of without departing from this utility model principle, it is also possible to make some improvements and modifications, these improve and profit
Decorations are also considered as protection domain of the present utility model.In the claims, word first, second and third use do not indicate that
These word explanations can be title by any order.
Claims (6)
1. the LED drive circuit of an electromagnetism interference, it is characterised in that: include rectification module, EMC immunity module and constant current
Module, described EMC immunity module includes common mode filtering submodule and differential mode filtering submodule, described common mode filtering submodule
Input incoming transport civil power, the outfan of common mode filtering submodule connects the input of rectification module, the output of rectification module
End connects the input of differential mode filtering submodule, and the outfan of differential mode filtering submodule connects the input of constant flow module；Constant current
The outfan of module connects LED module.
The LED drive circuit of a kind of electromagnetism interference the most as claimed in claim 1, it is characterised in that described LED drive circuit
Also including overload protection module, the input of described overload protection module connects live wire and zero line, the described overload of electric main
The outfan of protection module connects the input of common mode filtering submodule.
The LED drive circuit of a kind of electromagnetism interference the most as claimed in claim 1 or 2, it is characterised in that described constant flow module
Submodule, output separaant module and output filtering submodule is eliminated including constant current submodule, spike, described constant current submodule
Input connects the outfan of differential mode filtering submodule, and described spike eliminates the input of submodule and connects differential mode filtering submodule
Outfan, the input of described output separaant module connects spike and eliminates submodule and the outfan of constant current submodule, defeated
The outfan going out separaant module connects the input of output filtering submodule, and the outfan of output filtering submodule connects LED
Module.
The LED drive circuit of a kind of electromagnetism interference the most as claimed in claim 2, it is characterised in that described common mode filtering
Module includes that common mode inductance, an X electric capacity and the 2nd X electric capacity, described differential mode filtering submodule include differential mode inductance, the first resistance
With the first electric capacity, described rectification module uses rectifier bridge to realize, and described common mode inductance includes first coil and the second coil, and first
X capacitance series is between first end and the first end of the second coil of first coil, and the 2nd X capacitance series is the of first coil
Between two ends and the second end of the second coil, and the first end of the second coil connects the first exchange end of rectifier bridge, the second coil
Second end connect rectifier bridge second exchange end；First exchange end and the input of the second exchange end composition rectifier bridge, rectification
The outfan of bridge includes positive voltage output end and negative voltage outfan, and one end of described differential mode inductance connects the positive voltage of rectifier bridge
Outfan, the other end is connected serially to one end of the first electric capacity, the other end ground connection of the first electric capacity, and described first resistor coupled in parallel is connected to
The two ends of differential mode inductance.
The LED drive circuit of a kind of electromagnetism interference the most as claimed in claim 4, it is characterised in that described overload protection mould
Block includes electric fuse and varistor, and one end of described electric fuse connects the live wire of electric main, and other end concatenation is to pressure-sensitive electricity
First end of resistance, the second end of varistor connects the zero line of electric main；A described X electric capacity is connected in varistor in parallel
The first end and the second end between.
The LED drive circuit of a kind of electromagnetism interference the most as claimed in claim 3, it is characterised in that described output separaant
Module use three winding isolating transformer, described three winding isolating transformer include the first armature winding, the second armature winding and
Secondary windings, described first armature winding connects described spike and eliminates the outfan of submodule, and the second armature winding connects constant current
The outfan of submodule, the Same Name of Ends of described secondary windings connects input one end of output filtering submodule, and non-same polarity is even
Connect the other end of output filtering submodule input.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620467279.9U CN205754955U (en) | 2016-05-19 | 2016-05-19 | A kind of LED drive circuit of electromagnetism interference |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620467279.9U CN205754955U (en) | 2016-05-19 | 2016-05-19 | A kind of LED drive circuit of electromagnetism interference |
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| CN205754955U true CN205754955U (en) | 2016-11-30 |
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| CN201620467279.9U Active CN205754955U (en) | 2016-05-19 | 2016-05-19 | A kind of LED drive circuit of electromagnetism interference |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023060411A1 (en) * | 2021-10-11 | 2023-04-20 | 深圳技术大学 | Floodlight system for anechoic room or shielded room |
-
2016
- 2016-05-19 CN CN201620467279.9U patent/CN205754955U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023060411A1 (en) * | 2021-10-11 | 2023-04-20 | 深圳技术大学 | Floodlight system for anechoic room or shielded room |
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