CN202773123U - Drive circuit for full-color high-power external constant voltage LED light source - Google Patents
Drive circuit for full-color high-power external constant voltage LED light source Download PDFInfo
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- CN202773123U CN202773123U CN 201220309300 CN201220309300U CN202773123U CN 202773123 U CN202773123 U CN 202773123U CN 201220309300 CN201220309300 CN 201220309300 CN 201220309300 U CN201220309300 U CN 201220309300U CN 202773123 U CN202773123 U CN 202773123U
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- led light
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Abstract
The utility model provides a drive circuit for a full-color high-power external constant voltage LED light source. The drive circuit comprises a power circuit and an external constant voltage drive circuit connected with the power circuit. An output end of the external constant voltage drive circuit is connected with a load circuit. An output end of the power circuit is provided with a filter circuit and a voltage stabilizing circuit in parallel. The external constant voltage drive circuit is connected with an anti-interference circuit. The drive circuit using the above technical scheme improves anti-interference capability of the circuit, improves capability of driving multipath series-parallel connected high-power LED light sources when cascade span of an LED light source lamp is relatively large, and eliminates abnormality of flickering light when the LED light source is in processes of dimming and gradients.
Description
Technical field
The utility model relates to a kind of full-color high-power plug-in constant-voltage LED light source driving circuit.
Background technology
In recent years along with high speed development and " green illumination " concept of semiconductor light emitting illuminating material technology progressively are rooted in the hearts of the people, add that countries in the world are to energetically support and the attention of energy-saving and emission-reduction product, led light source is as the novel fourth generation green illumination light source, and it is widely used and the advantage of itself uniqueness enjoys people's favor at lighting field.Especially aspect the landmark building brightening illuminations such as night landscape illumination, outdoor media advertising, building lighting, bridge illumination etc.
Because led light source energy-conserving and environment-protective, strong shock resistance, without the infrared and ultraviolet radiation, luminous efficiency is high, the life-span is long, reliability is high, color effect is remarkable, be convenient to the characteristics such as intelligent digitalized control is that it is widely used.But in the engineering project of LED light fixture reality, because environment for use is complicated, transmission line is longer sometimes, will be subject to like this interference of external environment high voltage direct current static or thunder and lightning, in a single day scurry into high pressure or other interference signals etc. in the LED light fixture circuit, the capital may cause the electronic component in the light fixture to damage and short circuit, even also can cause the destructive accident phenomenon such as fire.
Because led light source all is CMOS integrated circuit type of drive, belong to accurate electronic component, antistatic, the interference free performance of circuit are relatively poor, thereby cause the LED light fixture to work and the Control on Communication signal error, long, single show when control circuit drives the multi-path large power led light source more obvious of organizing of especially large in LED light fixture cascade span, signal transmission line.Moreover because supply line all is long generally speaking, cause line drop larger, adopt many group Switching Power Supply supply power modes, and signal logic ground all is as reference ground with current potential own, led light source is in the process of light gradient and light modulation, because the variation of electric current causes the variation of ground reference, thereby caused LED light to be shaken and can't realize that single group drives multi-path large power all-colour LED light source.
Summary of the invention
The purpose of this utility model is to overcome the defective that exists in the background technology and can't drive in the situation of multichannel connection in series-parallel high-power LED light source, and the utility model provides that a kind of circuit structure is simple, the cascade data transmission is stable, antijamming capability is strong, the cascade span is far away, reliability is high, drive strong, the lower-cost a kind of full-color high-power plug-in constant-voltage LED light source driving circuit of multichannel connection in series-parallel high-power LED light source ability.
For achieving the above object, the utility model is by the following technical solutions:
A kind of full-color high-power plug-in constant-voltage LED light source driving circuit, it comprises power circuit and coupled plug-in constant voltage drive circuit, the output of described plug-in constant voltage drive circuit connects load circuit, and the output of described power circuit is arranged in parallel filter circuit and voltage stabilizing circuit; Described plug-in constant voltage drive circuit connects anti-jamming circuit.
Described filter circuit is made of the electrochemical capacitor and the ceramic condenser that are arranged in parallel at power circuit output end.
Described voltage stabilizing circuit is comprised of the current-limiting resistance and the voltage-stabiliser tube that are arranged in parallel at power circuit output end.
Described plug-in constant voltage drive circuit forms by driving chip and being arranged on the driving triode that drives chip output.
Described anti-jamming circuit forms by being arranged on the electric capacity that drives the chip input and being arranged on the resistance that drives chip output.
Input logic ground and the output logic other in cascade of described driving chip are got up, and are connected with the ground wire of load circuit.
Adopt the utility model of technique scheme, improved the antijamming capability of circuit, improve the ability of the driving multichannel connection in series-parallel high-power LED light source when led light source light fixture cascade span is larger, eliminated the led light source abnormality that light is shaken in light modulation and progressive formation.
Description of drawings
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment
As shown in Figure 1, a kind of full-color high-power plug-in constant-voltage LED light source driving circuit, it comprises power circuit, the output of power circuit is arranged in parallel filter circuit and voltage stabilizing circuit; Power circuit connects plug-in constant voltage drive circuit, and described plug-in constant voltage drive circuit connects anti-jamming circuit, connects load circuit through behind the anti-jamming circuit.
Power circuit according to the connection in series-parallel quantity of institute's driving LED light source and power+12V～+ select the direct current supply mode that is complementary between the 36V.
Filter circuit by electrochemical capacitor C1 and ceramic condenser C2 and connect and positive source and ground between.Because power supply is the key component of whole system, the quality of Power supply directly has influence on job stability and the cascade transmittability of chip, in the general LED lamp lighting system, the power supply frequent and led light source of the supply power mode of chip IC shares, perhaps voltage stabilizing obtains from led light source voltage, and the supply power voltage of the led light source of full-color variation is because transmission line effect, its fluctuation and noise are very large, even all can not obtain cleaner chip IC power environment through general voltage stabilizing chip, thereby cause driving the chip IC misoperation and affect transmission range.The utility model is exactly by at feeder ear and meet electrochemical capacitor C1 and ceramic condenser C2 smooth waveform and absorb clutter.Voltage stabilizing circuit is connected to after by current-limiting resistance RD1 and voltage-stabiliser tube D1 serial connection+12V～+ positive source and ground of 36V between;
Plug-in constant voltage drive circuit consists of with driving triode QR, QG, QB by driving chip U1.2 pin, 13 pin, 16 pin that drive chip U1 are connected with the negative pole of voltage-stabiliser tube D1, and 3 pin, 6 pin, 8 pin, 9 pin, 10 pin are connected with ground, and 1 pin is data DIN input port, and 4 pin are
ClockDCLK input port, 5 pin, 7 pin, 11 pin are that the driver output port is connected with the base stage that drives triode QR, QG, QB respectively, and 12 pin are
ClockDCLKO output port, 14 pin meet ceramic condenser C5 and connect respectively and drive triode QR, QG, biasing resistor RR, the RG of QB base stage, RB, and 15 pin are data DOUT output port.
Anti-jamming circuit is made of capacitor C 3, C4 and resistance R D2, RD3, wherein capacitor C 3 is connected between the data DIN input port and ground that drives chip U1, capacitor C 4 is connected between clock DCKL input port and the ground, RD2 is serially connected with between data DOUT output port and the rear class chip data DIN input port, RD3 is serially connected with between clock DCLKO output port and the rear class chip clock DCLK input port, and GND is that the chip earth terminal is drawn respectively the cascade for the front and back drive circuit.Because the distance of the cascade between lamp and the lamp is larger, the utility model is by holding over the ground shunt-wound capacitance C3 and C4 at DIN end and DCLK, wherein the capacity of capacitor C 3 and C4 all is that 15pF can play the effect that suppresses long line noise, by DOUT end and DCLKO end series resistor RD2 and RD3, wherein the resistance of RD2 and RD3 all is 51 Europe, can play the effect that prevents the rear class signal reflex.
Load circuit can be according to demand joined end to end by many groups red LED R1～Rn be connected to again after many groups are in parallel again behind serial connection current-limiting resistance RRL1～Ln+12V～+ collector electrode of 36V power supply and NPN large power triode QR between, many group green LED G1 ~ Gn join end to end and are connected to after many groups are in parallel again behind serial connection current-limiting resistance RGL1 ~ Ln again+12 ~+collector electrode of 36V power supply and NPN large power triode QG between, organize more blue led B1～Bn join end to end behind serial connection current-limiting resistance RBL1～Ln again organize be connected to again after being in parallel+12V～+ collector electrode of 36V power supply and NPN large power triode QB between.
Operation principle of the present utility model is: because the signal input and output of chip all are with reference to ground level with status own, so also will guarantee logically also will cascade up and be connected to the ground wire of led light source power supply during cascade, because full-color high-power plug-in constant-voltage LED light source driving circuit is in light modulation and progressive formation, its electric current that flows through changes constantly, its actual current potential also fluctuates, with this ground wire conduct logically, can bring interference into to the signal transmission, shake scintillation and the cascade curtailment that directly cause light, the present embodiment is drawn respectively the cascade that GND is used for front and back by the chip earth terminal, has well solved this problem.Because the present embodiment adopts driving chip U1 to control the driving triode, make it to drive the plug-in constant voltage type of drive that triode drives high-power LED light source, so the utility model drive circuit is applicable to drive under the higher occasion of multichannel connection in series-parallel high-power LED light source or voltage, be exactly to drive chip U1 by drive output OUT(1 in essence, 2,3) output signal level is controlled respectively plug-in driving triode QR, QG, QB and is made it to go to drive multichannel connection in series-parallel high-power LED light source again.Wherein, selecting of current-limiting resistance RL is R
L=(VCC-V
LED-V
CE)/I
LEDBase biasing resistor RR(RG, RB) generally get 2K Ω～5K Ω.The led light source of the present embodiment adopts the connection of multichannel " string more also first ", if when any paths of LEDs light source opens circuit in the series arm, will cause the whole led light sources of this branch road all not work.Therefore, the principle that the utility model connection should be followed: the led light source quantity of branch road series connection is unsuitable many, generally gets 3～10, and the branch circuit parallel connection number should not lack.Like this, not only dwindled the fault effects face that blows a led light source, and current-limiting resistance has been broken the whole up into parts, can be with many small-power current-limiting resistances of high-power current-limiting resistance programming, disperse to install by installing concentratedly to become, be conducive to the compacter of the heat radiation of current-limiting resistance and LED Design of Luminaires.Say like this and effectively solved the problem that drives multichannel connection in series-parallel high-power LED light source.
Claims (6)
1. full-color high-power plug-in constant-voltage LED light source driving circuit, it comprises power circuit and coupled plug-in constant voltage drive circuit, the output of described plug-in constant voltage drive circuit connects load circuit, and it is characterized in that: the output of described power circuit is arranged in parallel filter circuit and voltage stabilizing circuit; Described plug-in constant voltage drive circuit connects anti-jamming circuit.
2. full-color high-power plug-in constant-voltage LED light source driving circuit according to claim 1 is characterized in that: described filter circuit is made of the electrochemical capacitor (C1) and the ceramic condenser (C2) that are arranged in parallel at power circuit output end.
3. full-color high-power plug-in constant-voltage LED light source driving circuit according to claim 1, it is characterized in that: described voltage stabilizing circuit is comprised of the current-limiting resistance (RD1) and the voltage-stabiliser tube (D1) that are arranged in parallel at power circuit output end.
4. full-color high-power plug-in constant-voltage LED light source driving circuit according to claim 1 is characterized in that: described plug-in constant voltage drive circuit forms by driving chip (U1) and being arranged on the driving triode (QR, QG, QB) that drives chip output.
5. full-color high-power plug-in constant-voltage LED light source driving circuit according to claim 4, it is characterized in that: described anti-jamming circuit is by being arranged on the electric capacity (C3 that drives chip (U1) input, C4) and be arranged on the resistance (RD2, RD3) that drives chip (U1) output and form.
6. full-color high-power plug-in constant-voltage LED light source driving circuit according to claim 4 is characterized in that: the input logic ground of described driving chip (U1) and output logic other in cascade, and be connected with the ground wire of load circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220309300 CN202773123U (en) | 2012-06-29 | 2012-06-29 | Drive circuit for full-color high-power external constant voltage LED light source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220309300 CN202773123U (en) | 2012-06-29 | 2012-06-29 | Drive circuit for full-color high-power external constant voltage LED light source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202773123U true CN202773123U (en) | 2013-03-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220309300 Expired - Fee Related CN202773123U (en) | 2012-06-29 | 2012-06-29 | Drive circuit for full-color high-power external constant voltage LED light source |
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|---|---|
| CN (1) | CN202773123U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103886821A (en) * | 2014-04-21 | 2014-06-25 | 广州励成电子科技有限公司 | Rolling colorful display LED advertising lamp box |
-
2012
- 2012-06-29 CN CN 201220309300 patent/CN202773123U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103886821A (en) * | 2014-04-21 | 2014-06-25 | 广州励成电子科技有限公司 | Rolling colorful display LED advertising lamp box |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130306 Termination date: 20150629 |
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| EXPY | Termination of patent right or utility model |