CN206650866U - A kind of LED drive power circuit for suppressing inrush current - Google Patents
A kind of LED drive power circuit for suppressing inrush current Download PDFInfo
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- CN206650866U CN206650866U CN201621088289.8U CN201621088289U CN206650866U CN 206650866 U CN206650866 U CN 206650866U CN 201621088289 U CN201621088289 U CN 201621088289U CN 206650866 U CN206650866 U CN 206650866U
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Abstract
The utility model provides a kind of LED drive power circuit for suppressing inrush current, provided with the EMI filter circuit of original alternating current, the input rectification circuit of the connection EMI filter circuit and the DC/DC change-over circuits for being connected to the input rectification circuit is accessed, the DC/DC change-over circuits export LED DC power supplies;It is additionally provided with to be connected between input rectification circuit and the DC/DC change-over circuit and charges into exchange suppression circuit;The exchange suppression circuit of charging into includes the power-factor correction circuit of interconnection, charges into exchange suppression main circuit, and the power-factor correction circuit connects the input rectification circuit, and the exchange suppression main circuit of charging into connects the DC/DC change-over circuits.Implement a kind of LED drive power circuit for suppressing inrush current provided by the utility model, set up to charge into DC/DC change-over circuits in input rectification circuit and exchange suppression circuit to suppress inrush current, increase the quantity in parallel of LED drive power, wiring cost is reduced, good economic benefit is brought to user.
Description
Technical field
LED power actuation techniques field is the utility model is related to, more particularly to a kind of LED driving electricity for suppressing inrush current
Source circuit.
Background technology
With the development of LED industry, LED illumination technology is constantly ripe.Made of LED light source product with its specular removal,
The advantages that long-life, make the LED illumination industry entry high speed development stage, it replaces traditional lighting products at last.But start in LED
Moment, LED drive power can produce current spike to original alternating current, and referred to as inrush current, inrush current can cause sky
Air cock trips.And existing industry technology is the quantity used in parallel by reducing LED power, to avoid air switch from tripping,
But this way can increase the wiring cost of circuit.Therefore prior art is by increasing air switch surplus and increasing cloth
Line density, if using identical LED drive power quantity, existing industry technology can increase 4-8 times of wiring cost, not only cloth
Line is cumbersome to return user and brings certain economic loss.
The content of the invention
The utility model provides a kind of LED drive power circuit for suppressing inrush current, solves by input rectifying
Set up between circuit and DC/DC change-over circuits and charge into exchange suppression circuit to suppress the technical problem of inrush current.
To solve above technical problem, the utility model provides a kind of LED drive power circuit for suppressing inrush current, if
Have and access the EMI filter circuit of original alternating current, connect the input rectification circuit of the EMI filter circuit and be connected to described defeated
Enter the DC/DC change-over circuits of rectification circuit, the DC/DC change-over circuits export LED DC power supplies;It is additionally provided with and is connected to institute
State and charge into exchange suppression circuit between input rectification circuit and DC/DC change-over circuits;The exchange suppression circuit of charging into includes
The power-factor correction circuit of interconnection, exchange suppression main circuit is charged into, the power-factor correction circuit connection is described defeated
Enter rectification circuit, the exchange suppression main circuit of charging into connects the DC/DC change-over circuits;It is additionally provided with equivalent drive circuit, institute
State equivalent drive circuit to be connected to the power-factor correction circuit and charge between exchange suppression main circuit, or be connected to institute
State between input rectification circuit and power-factor correction circuit, or be connected to the EMI filter circuit and input rectification circuit
Between.
Further, the equivalent drive circuit is provided with the first equivalent resistance and the second equivalent resistance, and described first is equivalent
One end of the second equivalent resistance of one end connection of resistance, the other end of first equivalent resistance and second equivalent resistance
The other end connects the cathode output end and cathode output end or input rectifying electricity of the power-factor correction circuit respectively
The cathode output end and cathode output end on road or the cathode output end and cathode output end of the EMI filter circuit;The work(
The cathode output end and cathode output end of rate factor correction circuit are also connected with the DC/DC change-over circuits, the input rectifying electricity
The cathode output end and cathode output end on road are also connected with the power-factor correction circuit, and the positive pole of the EMI filter circuit is defeated
Go out end and cathode output end is also connected with the input rectification circuit.
Further, the exchange suppression main circuit of charging into is provided with energy storage filter capacitor, active switch and current-limiting resistance;
The energy storage filter capacitor is connected to the cathode output end of the power-factor correction circuit and opened with the first of the active switch
Between closing break-make end, or it is connected to the cathode output end of the power-factor correction circuit and is opened with the second of the active switch
Between the break-make end of pass;
Active opened with described when the energy storage filter capacitor is connected to the cathode output end of the power-factor correction circuit
When between the first switch break-make end of pass, the negative pole end of the energy storage filter capacitor connects the negative of the power-factor correction circuit
Pole output end, the positive terminal of the energy storage filter capacitor connect the first switch break-make end of the active switch, described active to open
The switch on and off drive end of pass connects the connection end of first equivalent resistance and the second equivalent resistance, and the of the active switch
Two switch on and off ends connect the cathode output end of the power-factor correction circuit;
Active opened with described when the energy storage filter capacitor is connected to the cathode output end of the power-factor correction circuit
When between the second switch break-make end of pass, the positive terminal of the energy storage filter capacitor is connecting the power-factor correction circuit just
Pole output end, the negative pole end of the energy storage filter capacitor connect the second switch break-make end of the active switch, described active to open
The switch on and off drive end of pass connects the connection end of first equivalent resistance and the second equivalent resistance, and the of the active switch
One switch on and off end connects the cathode output end of power-factor correction circuit;
Current-limiting resistance is connected between the first switch break-make end and second switch break-make end of the active switch.
Further, first equivalent resistance and the second equivalent resistance are equivalent to resistance Wei resistance characteristic is showed
Two groups of passive elements.
A kind of LED drive power circuit for suppressing inrush current provided by the utility model, in input rectification circuit and DC/
DC change-over circuits, which are additionally arranged, to be charged into exchange suppression circuit and controls the break-make of active switch by equivalent active circuit so as to reality
Suppression inrush current is showed.Compared with prior art, under identical wiring cost, the quantity used in parallel of LED drive power
Increase;Under identical LED drive power quantity, wiring cost reduce 4-8 times, this not only simplify connect up it is also cost-effective, again
Power consumption is reduced, good economic benefit is brought to user.
Brief description of the drawings
Fig. 1 is the physical circuit schematic diagram that the utility model embodiment 1 provides;
Fig. 1-1 be the utility model embodiment 1 provide equivalent drive circuit 50 located at power-factor correction circuit PFC with
The physical circuit schematic diagram charged between exchange suppression main circuit 41;
Fig. 1-2 is that the equivalent drive circuit 50 that the utility model embodiment 1 provides is located at input rectification circuit 20 and power
Physical circuit schematic diagram between factor correction circuit PFC;
Fig. 1-3 is that the equivalent drive circuit 50 that the utility model embodiment 1 provides is located at EMI filter circuit and power factor (PF)
Physical circuit schematic diagram between circuit for rectifying PFC;
Fig. 2 is the physical circuit schematic diagram that the utility model embodiment 2 provides;
Fig. 2-1 be the utility model embodiment 2 provide equivalent drive circuit 50 located at power-factor correction circuit PFC with
The physical circuit schematic diagram charged between exchange suppression main circuit 41;
Fig. 2-2 is that the equivalent drive circuit 50 that the utility model embodiment 2 provides is located at input rectification circuit 20 and power
Physical circuit schematic diagram between factor correction circuit PFC;
Fig. 2-3 is that the equivalent drive circuit 50 that the utility model embodiment 2 provides is located at EMI filter circuit and power factor (PF)
Physical circuit schematic diagram between circuit for rectifying PFC.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describe.The value size of following component is only preferred embodiment, is not formed to scope of protection of the utility model
Limitation.
Embodiment 1
It is the circuit theory diagrams that the utility model embodiment 1 provides referring to Fig. 1.In the present embodiment, with reference to figure 1-1, institute
The LED drive power circuit for a kind of suppression inrush current stated, provided with EMI filter circuit 10, the connection for accessing original alternating current
The input rectification circuit 20 of the EMI filter circuit 10 and the DC/DC change-over circuits 30 for being connected to the input rectification circuit 20,
The DC/DC change-over circuits 30 export LED DC power supplies, a kind of LED drive power electricity of described suppression inrush current
Road, it is additionally provided with to be connected between the input rectification circuit 20 and DC/DC change-over circuits 30 and charges into exchange suppression circuit 40;Institute
State the power-factor correction circuit PFC and charging into for charging into exchange suppression circuit 40 and including being connected with each other and exchange suppression main circuit 41,
The power-factor correction circuit PFC connections input rectification circuit 20, the exchange suppression main circuit 41 of charging into connect institute
DC/DC change-over circuits 30 are stated, a kind of LED drive power circuit of described suppression inrush current, are additionally provided with equivalent drive circuit
50, the equivalent drive circuit 50 is connected to the power-factor correction circuit PFC and charged between exchange suppression main circuit 41.
In the present embodiment, the equivalent drive circuit 50 is provided with the first equivalent resistance R1 and the second equivalent resistance R2, institute
The one end for stating the first equivalent resistance R1 connects the second equivalent resistance R2 one end, the other end of the first equivalent resistance R1 and institute
The other end for stating the second equivalent resistance R2 connects cathode output end and the negative pole output of the power-factor correction circuit PFC respectively
End;The cathode output end and cathode output end of the power-factor correction circuit PFC is also connected with the DC/DC change-over circuits 30.
In the present embodiment, the exchange suppression main circuit of charging into is provided with energy storage filter capacitor C, active switch N ditch metal-oxide-semiconductors
Q and current-limiting resistance R3;The energy storage filter capacitor C is connected to cathode output end and the institute of the power-factor correction circuit PFC
Between the first switch break-make end i.e. source S for stating active switch N ditch metal-oxide-semiconductors Q;The negative pole end connection of the energy storage filter capacitor C
The cathode output end of the power-factor correction circuit PFC, the positive terminal of the energy storage filter capacitor C connect the active switch
N ditch metal-oxide-semiconductors Q first switch break-make end is source S, and the switch on and off drive end of the active switch N ditch metal-oxide-semiconductors Q is grid G
Connect the first equivalent resistance R1 and the second equivalent resistance R2 connection end conj, the of the active switch N ditch metal-oxide-semiconductors Q
Two switch on and off ends are the cathode output end that drain D connects the power-factor correction circuit PFC;The active switch N ditches MOS
Pipe Q first switch break-make end is to be connected with current-limiting resistance R3 between source S and second switch break-make end i.e. drain D.
In the present embodiment, in circuit powered on moment, energy storage filter capacitor C charges through current-limiting resistance R3, by current-limiting resistance
Peak value surge current and current ramp caused by R3 (and source impedance) limitation energy storage filter capacitors C, by controlling current limliting electric
R3 and energy storage filter capacitor C time constant is hindered, suppression inrush current can be realized.Once input current drops to normal water
Flat, the switch on and off drive end that activation equivalent circuit 50 just activates active switch N ditch metal-oxide-semiconductors Q is grid G driving, accurate to control
Active switch N ditch metal-oxide-semiconductors Q service time and the voltage-transition at current-limiting resistance R3 both ends.In actual applications, it is low after opening
RDS(ON)(active switch N ditch metal-oxide-semiconductors Q second switch break-make end is between drain D and first switch break-make end i.e. source S to characteristic
Second switch break-make end is that the resistance value between drain D, first switch break-make end i.e. source S is very low after conducting) will be most
Reduce to limits the influence to LED drive power efficiency.
In the present embodiment, the input rectification circuit can also be connected to reference to figure 1-2, the activation equivalent circuit 50
Between 20 and power-factor correction circuit PFC, one end of the first equivalent resistance R1 connects the second equivalent resistance R2 one end,
The other end of the first equivalent resistance R1 and the second equivalent resistance R2 other end connect the input rectifying electricity respectively
The cathode output end and cathode output end on road 20;With reference to figure 1-3, the activation equivalent circuit 50 can also be connected to the EMI
Between filter circuit 10 and input rectification circuit 20, one end of the first equivalent resistance R1 connects the one of the second equivalent resistance R2
End, the other end of the first equivalent resistance R1 and the second equivalent resistance R2 other end connect the EMI filtering respectively
The cathode output end and cathode output end of circuit 10.
In the present embodiment, the first equivalent resistance R1 and the second equivalent resistance R2 refer under specified conditions, are in
Reveal the characteristic of resistive element and two groups of passive elements of resistance can be equivalent to;The active switch N ditch metal-oxide-semiconductors Q can also
It is other three ends active switch such as mos field effect transistor (MOSFE), power transistor by equivalence replacement
(Power Transistor), controllable silicon (Silicon Controlled Rectifier) or relay (Relay).
Embodiment 2
It is the circuit theory diagrams that the utility model embodiment 2 provides referring to Fig. 2.In the present embodiment, with reference to figure 2-1, institute
The LED drive power circuit for a kind of suppression inrush current stated, provided with EMI filter circuit 10, the connection for accessing original alternating current
The input rectification circuit 20 of the EMI filter circuit 10 and the DC/DC change-over circuits 30 for being connected to the input rectification circuit 20,
The DC/DC change-over circuits 30 export LED DC power supplies, a kind of LED drive power electricity of described suppression inrush current
Road, it is additionally provided with to be connected between the input rectification circuit 20 and DC/DC change-over circuits 30 and charges into exchange suppression circuit 40;Institute
State the power-factor correction circuit PFC and charging into for charging into exchange suppression circuit 40 and including being connected with each other and exchange suppression main circuit 41,
The power-factor correction circuit PFC connections input rectification circuit 20, the exchange suppression main circuit 41 of charging into connect institute
DC/DC change-over circuits 30 are stated, a kind of LED drive power circuit of described suppression inrush current, are additionally provided with equivalent drive circuit
50, the equivalent drive circuit 50 is connected to the power-factor correction circuit PFC and charged between exchange suppression main circuit 41.
In the present embodiment, the equivalent drive circuit 50 is provided with the first equivalent resistance R1 and the second equivalent resistance R2, institute
The one end for stating the first equivalent resistance R1 connects the second equivalent resistance R2 one end, the other end of the first equivalent resistance R1 and institute
The other end for stating the second equivalent resistance R2 connects cathode output end and the negative pole output of the power-factor correction circuit PFC respectively
End;The cathode output end and cathode output end of the power-factor correction circuit PFC is also connected with the DC/DC change-over circuits 30.
In the present embodiment, the exchange suppression main circuit 41 of charging into is provided with energy storage filter capacitor C, active switch N ditches MOS
Pipe Q and current-limiting resistance R3;The energy storage filter capacitor C be connected to the cathode output end of the power-factor correction circuit PFC with
The second switch break-make end of the active switch N ditch metal-oxide-semiconductors Q is between drain D;The positive terminal of the energy storage filter capacitor C connects
Connect the cathode output end of the power-factor correction circuit PFC, the negative pole end connection of the energy storage filter capacitor C is described active to open
The second switch break-make end for closing N ditch metal-oxide-semiconductors Q is drain D;The switch on and off drive end of the active switch N ditch metal-oxide-semiconductors Q is grid
Pole G connections the first equivalent resistance R1 and the second equivalent resistance R2 connection end con j, the active switch N ditch metal-oxide-semiconductors Q
Second switch break-make end be cathode output end that source S connects the power-factor correction circuit PFC;The active switch N
Ditch metal-oxide-semiconductor Q first switch break-make end is to be connected with current-limiting resistance R3 between source S and second switch break-make end i.e. drain D.
In the present embodiment, in circuit powered on moment, energy storage filter capacitor C charges through current-limiting resistance R3, by current-limiting resistance
Peak value surge current and current ramp caused by R3 (and source impedance) limitation energy storage filter capacitors C, by controlling current limliting electric
R3 and energy storage filter capacitor C time constant is hindered, suppression inrush current can be realized.Once input current drops to normal water
Flat, the switch on and off drive end that activation equivalent circuit 50 just activates active switch N ditch metal-oxide-semiconductors Q is grid G driving, accurate to control
Active switch N ditch metal-oxide-semiconductors Q service time and the voltage-transition at current-limiting resistance R3 both ends.In actual applications, it is low after opening
RDS(ON)(active switch N ditch metal-oxide-semiconductors Q second switch break-make end is between drain D and first switch break-make end i.e. source S to characteristic
Second switch break-make end is that the resistance value between drain D, first switch break-make end i.e. source S is very low after conducting) will be most
Reduce to limits the influence to LED drive power efficiency.
In the present embodiment, the input rectification circuit can also be connected to reference to figure 2-2, the activation equivalent circuit 50
Between 20 and power-factor correction circuit PFC, one end of the first equivalent resistance R1 connects the second equivalent resistance R2 one end,
The other end of the first equivalent resistance R1 and the second equivalent resistance R2 other end connect the input rectifying electricity respectively
The cathode output end and cathode output end on road 20;With reference to figure 2-3, the activation equivalent circuit 50 can also be connected to the EMI
Between filter circuit 10 and input rectification circuit 20, one end of the first equivalent resistance R1 connects the one of the second equivalent resistance R2
End, the other end of the first equivalent resistance R1 and the second equivalent resistance R2 other end connect the EMI filtering respectively
The cathode output end and cathode output end of circuit 10.
In the present embodiment, the first equivalent resistance R1 and the second equivalent resistance R2 refer under specified conditions, are in
Reveal the characteristic of resistive element and two groups of passive elements of resistance can be equivalent to;The active switch N ditch metal-oxide-semiconductors Q can also
It is other three ends active switch such as mos field effect transistor (MOSFE), power transistor by equivalence replacement
(Power Transistor), controllable silicon (Silicon Controlled Rectifier) or relay (Relay).
Described above is preferred embodiment of the present utility model, it is noted that for the ordinary skill of the art
For personnel, on the premise of the utility model principle is not departed from, some improvements and modifications can also be made, these are improved and profit
Decorations are also considered as the scope of protection of the utility model.
Claims (4)
- A kind of 1. LED drive power circuit for suppressing inrush current, provided with EMI filter circuit, the connection for accessing original alternating current The input rectification circuit of the EMI filter circuit and the DC/DC change-over circuits for being connected to the input rectification circuit, the DC/ DC change-over circuits export LED DC power supplies, it is characterised in that are additionally provided with and are connected to the input rectification circuit and DC/DC Exchange suppression circuit is charged between change-over circuit;The power-factor correction charged into exchange suppression circuit and include being connected with each other Circuit, exchange suppression main circuit is charged into, the power-factor correction circuit connects the input rectification circuit, described to charge into exchange Suppress main circuit and connect the DC/DC change-over circuits;Equivalent drive circuit is additionally provided with, the equivalent drive circuit is connected to described Power-factor correction circuit and charge between exchange suppresses main circuit, or be connected to the input rectification circuit and power factor (PF) Between circuit for rectifying, or it is connected between the EMI filter circuit and input rectification circuit.
- A kind of 2. LED drive power circuit for suppressing inrush current as claimed in claim 1, it is characterised in that:It is described equivalent Drive circuit is provided with the first equivalent resistance and the second equivalent resistance, and one end of first equivalent resistance connects the second equivalent resistance One end, the other end of the other end of first equivalent resistance and second equivalent resistance connects the power factor (PF) respectively The cathode output end and cathode output end of circuit for rectifying or the cathode output end and cathode output end of the input rectification circuit Or the cathode output end and cathode output end of the EMI filter circuit;The cathode output end of the power-factor correction circuit The DC/DC change-over circuits, the cathode output end and cathode output end of the input rectification circuit are also connected with cathode output end It is also connected with the power-factor correction circuit, the cathode output end and cathode output end of the EMI filter circuit are also connected with described Input rectification circuit.
- A kind of 3. LED drive power circuit for suppressing inrush current as claimed in claim 2, it is characterised in that:It is described to charge into Exchange suppresses main circuit and is provided with energy storage filter capacitor, active switch and current-limiting resistance;The energy storage filter capacitor is connected to described Between the cathode output end of power-factor correction circuit and the first switch break-make end of the active switch, or it is connected to described Between the cathode output end of power-factor correction circuit and the second switch break-make end of the active switch;When the energy storage filter capacitor is connected to the cathode output end of the power-factor correction circuit and the active switch When between first switch break-make end, the negative pole of the negative pole end connection power-factor correction circuit of the energy storage filter capacitor is defeated Go out end, the positive terminal of the energy storage filter capacitor connects the first switch break-make end of the active switch, the active switch Switch on and off drive end connects the connection end of first equivalent resistance and the second equivalent resistance, and the second of the active switch opens Close the cathode output end that break-make end connects the power-factor correction circuit;When the energy storage filter capacitor is connected to the cathode output end of the power-factor correction circuit and the active switch When between second switch break-make end, the positive pole of the positive terminal connection power-factor correction circuit of the energy storage filter capacitor is defeated Go out end, the negative pole end of the energy storage filter capacitor connects the second switch break-make end of the active switch, the active switch Switch on and off drive end connects the connection end of first equivalent resistance and the second equivalent resistance, and the first of the active switch opens Close the cathode output end of break-make end connection power-factor correction circuit;Current-limiting resistance is connected between the first switch break-make end and second switch break-make end of the active switch.
- A kind of 4. LED drive power circuit for suppressing inrush current as claimed in claim 2, it is characterised in that:Described first Equivalent resistance and the second equivalent resistance are two groups of passive elements for showing resistance characteristic and being equivalent to resistance.
Priority Applications (1)
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CN201621088289.8U CN206650866U (en) | 2016-09-28 | 2016-09-28 | A kind of LED drive power circuit for suppressing inrush current |
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CN201621088289.8U CN206650866U (en) | 2016-09-28 | 2016-09-28 | A kind of LED drive power circuit for suppressing inrush current |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN106455204A (en) * | 2016-09-28 | 2017-02-22 | 惠州市华阳光电技术有限公司 | LED drive power supply circuit for suppressing inrush current |
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2016
- 2016-09-28 CN CN201621088289.8U patent/CN206650866U/en active Active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106455204A (en) * | 2016-09-28 | 2017-02-22 | 惠州市华阳光电技术有限公司 | LED drive power supply circuit for suppressing inrush current |
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