CN206042430U - Reduce LED linear drive current harmonic's circuit - Google Patents
Reduce LED linear drive current harmonic's circuit Download PDFInfo
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- CN206042430U CN206042430U CN201620862529.9U CN201620862529U CN206042430U CN 206042430 U CN206042430 U CN 206042430U CN 201620862529 U CN201620862529 U CN 201620862529U CN 206042430 U CN206042430 U CN 206042430U
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Abstract
The utility model discloses a reduce LED linear drive current harmonic's circuit, including chip U1, diode D4, rectifier bridge BD1 and resistance R3, rectifier bridge BD1's a voltage input holds connecting resistance VD1 and 220V alternating current, another voltage input end connecting resistance VD1's of rectifier bridge BD1 the other end and fuse FU, and the other end of 220V alternating current, rectifier bridge BD1's voltage output end connecting resistance R1, resistance R3 and diode D1's positive pole is connected to fuse FU's the other end. The utility model discloses reduce LED linear drive current harmonic's circuit adopts the linear LED drive circuit of CJ3030EF chip, effectively increased drive IC the utilization ratio, increased IC's stability, guarantee PF value maximize and minimumization of current harmonic simultaneously.
Description
Technical field
The present invention relates to LED field, specifically a kind of circuit for reducing LED linear driving current harmonic wave.
Background technology
In Linear Driving like product, 7 segment drive circuits, such drive are composed in series by 24 sections of driving IC typically
Flowing mode, single-point current harmonics substantially meet authentication requesting, but average current harmonic wave is still more than 20%, while IC utilization rates are not
Height, driving current are too high, are unfavorable for the stability of IC.
In view of in current industry, LED linear drives the drawbacks of existing in terms of current harmonics is solved, and this patent is solved
Problem above, while ensure that PF values are maximized and current harmonics minimumization.
The content of the invention
It is an object of the invention to provide a kind of circuit for reducing LED linear driving current harmonic wave, to solve above-mentioned background
The problem proposed in technology.
For achieving the above object, the present invention provides following technical scheme：
A kind of circuit for reducing LED linear driving current harmonic wave, including chip U1, diode D4, rectifier bridge BD1 and resistance
One voltage input end connection resistance VD1 and 220V alternating current of R3, the rectifier bridge BD1, another voltage of rectifier bridge BD1
The other end of the other end and electric fuse FU, electric fuse FU of input connection resistance VD1 connects the other end of 220V alternating currents, whole
The voltage output end connection resistance R1 of stream bridge BD1, the anode of resistance R3 and diode D1, the other end connection resistance of resistance R1
The pin 3 of the other end connection resistance R4 of R2, resistance R2, electric capacity C2, electric capacity C3, the negative electrode of diode D4 and chip U1, electric capacity
The other end connection resistance R4 of C2, resistance R6, the earth terminal of resistance R7 and rectifier bridge BD1, the other end connection resistance of resistance R6
The pin 1 of the other end of R7, the anode of diode D4, electric capacity C1, the other end of electric capacity C3, resistance R5 and chip U1, chip U1
Pin 2 connect resistance R5 the other end, resistance R3 the other end connection electric capacity C1 the other end and chip U1 pin 4, two
The anode and the foot 5 of chip U1 of the negative electrode connection diode D2 of pole pipe D1, the foot 6 of chip U1 connect the negative electrode and two of diode D2
The anode of pole pipe D3, the negative electrode and the anode of diode D5 of the connection diode D3 of foot 7 of chip U1, the negative electrode connection of diode D5
The foot 8 of chip U1, model CJ3030E/F of the chip U1.
As the preferred version of the present invention：The diode D1-D4 is light emitting diode.
Compared with prior art, the invention has the beneficial effects as follows：This utility model reduces LED linear driving current harmonic wave
Circuit adopts the linear LED drive circuit of CJ3030E/F chips, effectively increases and drives the utilization rate of IC, increased stablizing for IC
Property, while ensureing that PF values are maximized and current harmonics minimumization.
Description of the drawings
Fig. 1 is circuit diagram of the present utility model；
Fig. 2 is LED power datagram.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than the embodiment of whole.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Refer to Fig. 1-2, a kind of circuit of reduction LED linear driving current harmonic wave, including chip U1, diode D4, whole
One voltage input end connection resistance VD1 and 220V alternating current of stream bridge BD1 and resistance R3, the rectifier bridge BD1, rectifier bridge
The other end of another voltage input end connection resistance VD1 and the other end connection 220V of electric fuse FU, electric fuse FU of BD1 is handed over
The other end of stream electricity, the voltage output end connection resistance R1 of rectifier bridge BD1, the anode of resistance R3 and diode D1, resistance R1's
The other end connects resistance R2, the other end connection resistance R4 of resistance R2, electric capacity C2, electric capacity C3, the negative electrode of diode D4 and chip
The pin 3 of U1, the other end connection resistance R4 of electric capacity C2, resistance R6, the earth terminal of resistance R7 and rectifier bridge BD1, resistance R6's
The other end of other end connection resistance R7, the anode of diode D4, electric capacity C1, the other end of electric capacity C3, resistance R5 and chip U1
Pin 1, the pin 2 of chip U1 connects the other end of resistance R5, the other end and core of the other end connection electric capacity C1 of resistance R3
The pin 4 of piece U1, the anode and the foot 5 of chip U1 of the negative electrode connection diode D2 of diode D1, the foot 6 of chip U1 connect two poles
The anode of the negative electrode and diode D3 of pipe D2, the negative electrode and the anode of diode D5 of the connection diode D3 of foot 7 of chip U1, two poles
The negative electrode of pipe D5 connects the foot 8 of chip U1, model CJ3030E/F of the chip U1.
Diode D1-D4 is light emitting diode.
The present invention operation principle be：R1 in circuit, R2, R4 constitute input voltage sampling network, due to input voltage
It is through rectification（Without filtering）Export afterwards, so output voltage is pulsating direct current, formed less than 1.2V's Jing after R4 partial pressures
Pulsating volage, the effect of C2 are to eliminate start spike, as the voltage of the 3rd feet of IC is pulses, that is, follow input voltage phase
Position change and change, as shown in Figure 2, driving current also follows input voltage phase synchronously to change, this ensures that there electric current with
The synchronicity of voltage-phase, then the current harmonics for obtaining will be minimized.The effect of D4 is overvoltage protection, that is, protect IC the
3 feet.R6, R7 are current limliting feedback resistances, and its effect is when input voltage is changed greatly, it is ensured that output change is less.
As the 3rd pin of CJ3030E/F chips has simulation dimming function,（As shown in Figure 2）I.e. voltage is in 0.12V-
During 1.2V, driving current can be adjusted between 10%-100%, using this feature, coordinate invariable power circuit and low current harmonic wave electricity
Road, can accomplish invariable power and low current harmonic wave function simultaneously.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie
In the case of spirit or essential attributes without departing substantially from the present invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, embodiment all should be regarded as exemplary, and be nonrestrictive, the scope of the present invention is by appended power
Profit is required rather than described above is limited, it is intended that all in the implication and scope of the equivalency of claim by falling
Change is included in the present invention.Any reference in claim should not be considered as and limit involved claim.
Moreover, it will be appreciated that although this specification is been described by according to embodiment, not each embodiment is only wrapped
Containing an independent technical scheme, this narrating mode of description is only that those skilled in the art should for clarity
Using description as an entirety, the technical scheme in each embodiment can also Jing it is appropriately combined, form those skilled in the art
Understandable other embodiment.
Claims (2)
1. it is a kind of reduce LED linear driving current harmonic wave circuit, including chip U1, diode D4, rectifier bridge BD1 and resistance
R3, it is characterised in that a voltage input end connection resistance VD1 and 220V alternating current of the rectifier bridge BD1, rectifier bridge BD1
Another voltage input end connection resistance VD1 the other end and the other end connection 220V exchanges of electric fuse FU, electric fuse FU
The other end of electricity, the voltage output end connection resistance R1 of rectifier bridge BD1, the anode of resistance R3 and diode D1, resistance R1's is another
One end connects resistance R2, the other end connection resistance R4 of resistance R2, electric capacity C2, electric capacity C3, the negative electrode of diode D4 and chip U1
Pin 3, electric capacity C2 the other end connection resistance R4, resistance R6, the earth terminal of resistance R7 and rectifier bridge BD1, resistance R6's is another
One end connection other end of resistance R7, the anode of diode D4, electric capacity C1, the other end of electric capacity C3, resistance R5 and chip U1
Pin 1, the pin 2 of chip U1 connect the other end of resistance R5, the other end and chip of the other end connection electric capacity C1 of resistance R3
The pin 4 of U1, the anode and the foot 5 of chip U1 of the negative electrode connection diode D2 of diode D1, the connection diode of foot 6 of chip U1
The anode of the negative electrode and diode D3 of D2, the negative electrode and the anode of diode D5 of the connection diode D3 of foot 7 of chip U1, diode
The negative electrode of D5 connects the foot 8 of chip U1, model CJ3030E/F of the chip U1.
2. it is according to claim 1 it is a kind of reduce LED linear driving current harmonic wave circuit, it is characterised in that described two
Pole pipe D1-D4 is light emitting diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620862529.9U CN206042430U (en) | 2016-08-09 | 2016-08-09 | Reduce LED linear drive current harmonic's circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620862529.9U CN206042430U (en) | 2016-08-09 | 2016-08-09 | Reduce LED linear drive current harmonic's circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206042430U true CN206042430U (en) | 2017-03-22 |
Family
ID=58309342
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620862529.9U Active CN206042430U (en) | 2016-08-09 | 2016-08-09 | Reduce LED linear drive current harmonic's circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206042430U (en) |
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2016
- 2016-08-09 CN CN201620862529.9U patent/CN206042430U/en active Active
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| GR01 | Patent grant |