CN202475884U - Light emitting diode (LED) driving device - Google Patents
Light emitting diode (LED) driving device Download PDFInfo
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- CN202475884U CN202475884U CN2012200770811U CN201220077081U CN202475884U CN 202475884 U CN202475884 U CN 202475884U CN 2012200770811 U CN2012200770811 U CN 2012200770811U CN 201220077081 U CN201220077081 U CN 201220077081U CN 202475884 U CN202475884 U CN 202475884U
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Abstract
The utility model discloses a light emitting diode (LED) driving device. The LED driving device comprises a power conversion unit, a microprocessor controller and an LED circuit, wherein the power conversion unit comprises a pulse transformer and a switch control circuit; a primary winding on the input side of the pulse transformer is connected with a rectification filtering circuit through the switch control circuit; a secondary winding and an auxiliary winding on the output side of the pulse transformer are connected with the power end of the microprocessor controller through a constant-voltage control circuit; and the output end of the microprocessor controller is connected with the LED circuit. According to the LED driving device, the switch signals of a mechanical lamp switch are acquired by the switch control circuit, and the LED circuit is driven by the microprocessor controller for dimming, so that the radiating effect is improved, the power consumption is reduced, and the luminance is increased.
Description
Technical field
The utility model relates to a kind of drive circuit, relates in particular to a kind of LED drive unit.
Background technology
LED (Light Emitting Diode), light-emitting diode is a kind of solid-state semiconductor device, it can directly be converted into light to electricity.The heart of LED is a semi-conductive wafer, and an end of wafer is attached on the support, and an end is a negative pole, and the other end connects the positive pole of power supply, makes entire wafer by epoxy encapsulation.Semiconductor wafer is made up of two parts, and a part is a P type semiconductor, occupies an leading position in its hole, the inside, and the other end is a N type semiconductor, mainly is electronics here.But when these two kinds of semiconductors couple together, just form a P-N knot between them.When electric current acted on this wafer through lead, electronics will be pushed to the P district, and electronics will send energy with the form of photon, the luminous principle of LED that Here it is then with hole-recombination in the P district.And the light wavelength color of light just is by the material decision that forms the P-N knot.
LED drive unit in the market, it is not enough that major part exists brightness, and power is too high, and radiating effect is poor, and optical attenuation is fast, problems such as cost height.Therefore, be necessary to improve the LED drive unit, reduce power consumption and improve brightness.
The utility model content
The utility model technical problem to be solved provides a kind of LED drive unit, can improve radiating effect, reduces power consumption and improves brightness.
The utility model is to solve the problems of the technologies described above the technical scheme that adopts to provide a kind of LED drive unit; Comprise power conversion unit, microprocessor controller and led circuit; Wherein, Said power conversion unit comprises pulse transformer and ON-OFF control circuit; The elementary winding of said pulse transformer input side links to each other with current rectifying and wave filtering circuit through ON-OFF control circuit, and the secondary winding of outlet side links to each other with the power end of auxiliary winding through constant-voltage control circuit and microprocessor controller, and the output of said microprocessor controller links to each other with led circuit.
Above-mentioned LED drive unit, wherein, said current rectifying and wave filtering circuit comprises prime capacitor C X1, rectifier bridge BD1 and elementary π shape filter circuit, said elementary π shape filter circuit is made up of capacitor C 1, capacitor C 2 and inductance L 1.
Above-mentioned LED drive unit; Wherein, Said ON-OFF control circuit comprises master switch frequency chip, and the drain electrode end D of said master switch frequency chip links to each other with pop wave absorbing circuit, and said pop wave absorbing circuit is by capacitor C 3; Resistance R 4 is formed with diode D4, and the two ends of said pop wave absorbing circuit link to each other with the two ends of the elementary winding of pulse transformer.
Above-mentioned LED drive unit, wherein, said constant-voltage control circuit comprises voltage-stabilizing output circuit and boost voltage control circuit; The positive terminal Vo+ of said voltage-stabilizing output circuit links to each other through an end of the secondary winding of inductance L 3, rectifying tube D6 and pulse transformer; The other end of the secondary winding of negative pole end Vo-and pulse transformer links to each other; Said rectifying tube D6 two ends are parallel with the filter circuit of being made up of resistance R 6 and capacitor C 8; The two ends of inductance L 3 are through output filter capacitor C6, and the other end of C7 and secondary winding links to each other; The output of rectifying tube D6 is through constant voltage voltage-stabiliser tube VR2, and the output that detects resistance R 7 and photoelectrical coupler U2 links to each other, and the input of said photoelectrical coupler U2 links to each other with the output FB of master switch frequency chip; Said boost voltage control circuit is by diode D5; Capacitor C 4 is formed with resistance R 5; Said diode D5; The two ends of the auxiliary winding of capacitor C 4 and pulse transformer link to each other and form the closed-loop path, and an end of said capacitor C 4 links to each other other end ground connection through the bypass end BP of resistance R 5 and master switch frequency chip; The bypass end BP of said master switch frequency chip is through capacitor C 5 ground connection.
Above-mentioned LED drive unit; Wherein, The power end Vcc of said microprocessor controller links to each other through the positive terminal Vo+ of three terminal regulator and voltage-stabilizing output circuit, allows Enable Pin K to link to each other with voltage-stabilizing output circuit through the impulse level decision circuitry, and said impulse level decision circuitry is by diode D1; Resistance R 1 is formed with R2, connects with resistance R 1 after said diode D1 and resistance R 2 parallel connections again.
Above-mentioned LED drive unit, wherein, the constant-current control circuit that the output of said microprocessor controller is made up of double-triode valve through many groups links to each other with led circuit, and every group of constant-current control circuit drives a paths of LEDs circuit.
Above-mentioned LED drive unit, wherein, said led circuit comprises CL1, CL2, CL3 three paths of LEDs lamp strings, every paths of LEDs lamp string is formed by a plurality of LED connection in series-parallel.
The utility model contrast prior art has following beneficial effect: the LED drive unit that the utility model provides; Utilize ON-OFF control circuit to gather the switching signal of mechanical type light fixture; Carry out light modulation through microprocessor controller driving LED circuit; Thereby improve radiating effect, reduce power consumption and improve brightness.
Description of drawings
Fig. 1 is the utility model LED drive unit circuit block diagram;
Fig. 2 is a power conversion unit circuit diagram in the utility model LED drive unit;
Fig. 3 is a microprocessor controller circuit diagram in the utility model LED drive unit;
Fig. 4 is a led circuit sketch map in the utility model LED drive unit.
Among the figure:
1 current rectifying and wave filtering circuit, 2 ON-OFF control circuits, 3 pulse transformers
4 constant-voltage control circuits, 5 microprocessor controller 6LED circuit
41 voltage-stabilizing output circuits, 42 boost voltage control circuits
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is done further to describe.
Fig. 1 is the utility model LED drive unit circuit block diagram; Fig. 2 is a power conversion unit circuit diagram in the utility model LED drive unit.
See also Fig. 1 and Fig. 2; The LED drive unit that the utility model provides comprises power conversion unit, microprocessor controller 5 and led circuit 6; Wherein, The power end of microprocessor controller 5 links to each other with power conversion unit, and output links to each other with led circuit 6, and said power conversion unit comprises pulse transformer 3 and ON-OFF control circuit 2; The elementary winding of pulse transformer 3 input sides links to each other with current rectifying and wave filtering circuit 1 through ON-OFF control circuit 2, and the secondary winding of outlet side links to each other with led circuit 6 through constant-voltage control circuit 4 with auxiliary winding.Power conversion unit input 220V electric main transforms output 4～20V direct voltage through transformer, transfers led circuit 6 and microcontroller processor 5 needed voltage of work and electric currents to.HF switch control circuit 2 can link to each other with microcontroller processor 5 and realize whole lamp outage--energising control (make-and-break time is in 5 seconds); Change the LED luminosity, microcontroller processor 5 can be set at one section light modulation or N (the segmentation numeral of whole lamp luminosity) section light modulation.
Master switch frequency chip in the ON-OFF control circuit 2 can be selected the TNY family chip of PI company for use, such as TNY278PN, TNY279PN.This chip comprises source terminal S, Enable Pin EN, bypass end BP and drain electrode end D, and is as shown in Figure 2; The drain electrode end D of master switch frequency chip links to each other with pop wave absorbing circuit, and said pop wave absorbing circuit is by capacitor C 3, and resistance R 4 is formed with diode D4, and the two ends of said pop wave absorbing circuit link to each other with the two ends of the elementary winding of pulse transformer.
Fig. 3 is a microprocessor controller circuit diagram in the utility model LED drive unit.
Please continue referring to Fig. 3; The master chip model that microcontroller processor 5 is selected for use is LB308NJ; The external impulse level decision circuitry of permission Enable Pin K (2 pin) of master chip; Said impulse level decision circuitry is by diode D1, and resistance R 1 is formed with R2, connects with resistance R 1 after said diode D1 and resistance R 2 parallel connections again.The power end Vcc of master chip links to each other through the positive terminal Vo+ of U2 and voltage-stabilizing output circuit; U2 is the three terminal regulator of 5V; The voltage transition that driving power is produced is the needed 5V voltage of control IC operate as normal; And the voltage input end VCC of IC external the electrochemical capacitor C3 of a 1000uF come to do a power supply that continues row to chip, AC1, AC2 are the interchange incoming ends (220V AC switching signal) of power-supply controller of electric.After switch broke, AC1, AC2 did not exchange input, and regular situation is that entire circuit has not had electric current; The circuit that R1 among Fig. 3, R2, D1 form can produce a low level and write down into chip, and electrochemical capacitor C3 can give the chip continued power several seconds.When driving power because the once action of traditional type mechanical switch by oco; The K pin of master chip can receive the level variable signal that captures from level judging circuit; Thereby make once record, and can lead to three pin CL1/CL2/CL3 of output or disconnected control.Three groups of constant-current circuits of being built by double-triode valve are being controlled the output of three paths of LEDs respectively, and are as shown in Figure 4.Thereby form, under the different situation of number of times of traditional type mechanical switch action, can occur one the road or the luminous effect of LED multi-path; Finally formed the LED bulb lamp and can accomplish the illuminating effect of different brightness through traditional mechanical formula switch.
In sum, LED drive unit and control method thereof that the utility model provides can be through using intrinsic mechanical type lamp switch to new LED lamp brightness processed, the shutoff through switch with open the control that decides a brightness.In the different period illumination of fixed-site different demands is arranged for people, what need before light that need be moderate relatively during such as the bright light of need of work, amusement, the rest is more weak illumination.A same LEDs electricity-saving lamp; Can in different demands, show different luminous fluxes; Simultaneously power also can different (the corresponding higher power consumption relatively of high light, the corresponding relatively low power consumptions of the low light level), thereby have avoided the unnecessary consumption of electric energy, are beneficial to energy-conserving and environment-protective.
Though the utility model discloses as above with preferred embodiment; Right its is not in order to limit the utility model; Any those skilled in the art; In spirit that does not break away from the utility model and scope, when can doing a little modification and perfect, so the protection range of the utility model is when being as the criterion with what claims defined.
Claims (7)
1. LED drive unit; Comprise power conversion unit, microprocessor controller and led circuit; It is characterized in that said power conversion unit comprises pulse transformer and ON-OFF control circuit, the elementary winding of said pulse transformer input side links to each other with current rectifying and wave filtering circuit through ON-OFF control circuit; The secondary winding of outlet side links to each other with the power end of auxiliary winding through constant-voltage control circuit and microprocessor controller, and the output of said microprocessor controller links to each other with led circuit.
2. LED drive unit as claimed in claim 1 is characterized in that, said current rectifying and wave filtering circuit comprises prime capacitor C X1, rectifier bridge BD1 and elementary π shape filter circuit, and said elementary π shape filter circuit is made up of capacitor C 1, capacitor C 2 and inductance L 1.
3. LED drive unit as claimed in claim 1; It is characterized in that; Said ON-OFF control circuit comprises master switch frequency chip, and the drain electrode end D of said master switch frequency chip links to each other with pop wave absorbing circuit, and said pop wave absorbing circuit is by capacitor C 3; Resistance R 4 is formed with diode D4, and the two ends of said pop wave absorbing circuit link to each other with the two ends of the elementary winding of pulse transformer.
4. LED drive unit as claimed in claim 1 is characterized in that, said constant-voltage control circuit comprises voltage-stabilizing output circuit and boost voltage control circuit; The positive terminal Vo+ of said voltage-stabilizing output circuit links to each other through an end of the secondary winding of inductance L 3, rectifying tube D6 and pulse transformer; The other end of the secondary winding of negative pole end Vo-and pulse transformer links to each other; Said rectifying tube D6 two ends are parallel with the filter circuit of being made up of resistance R 6 and capacitor C 8; The two ends of inductance L 3 are through output filter capacitor C6, and the other end of C7 and secondary winding links to each other; The output of rectifying tube D6 is through constant voltage voltage-stabiliser tube VR2, and the output that detects resistance R 7 and photoelectrical coupler U2 links to each other, and the input of said photoelectrical coupler U2 links to each other with the output FB of master switch frequency chip; Said boost voltage control circuit is by diode D5; Capacitor C 4 is formed with resistance R 5; Said diode D5; The two ends of the auxiliary winding of capacitor C 4 and pulse transformer link to each other and form the closed-loop path, and an end of said capacitor C 4 links to each other other end ground connection through the bypass end BP of resistance R 5 and master switch frequency chip; The bypass end BP of said master switch frequency chip is through capacitor C 5 ground connection.
5. LED drive unit as claimed in claim 4; It is characterized in that; The power end Vcc of said microprocessor controller links to each other through the positive terminal Vo+ of three terminal regulator and voltage-stabilizing output circuit, allows Enable Pin K to link to each other with voltage-stabilizing output circuit through the impulse level decision circuitry, and said impulse level decision circuitry is by diode D1; Resistance R 1 is formed with R2, connects with resistance R 1 after said diode D1 and resistance R 2 parallel connections again.
6. LED drive unit as claimed in claim 1 is characterized in that, the constant-current control circuit that the output of said microprocessor controller is made up of double-triode valve through many groups links to each other with led circuit, and every group of constant-current control circuit drives a paths of LEDs circuit.
7. LED drive unit as claimed in claim 6 is characterized in that, said led circuit comprises CL1, CL2, CL3 three paths of LEDs lamp strings, and every paths of LEDs lamp string is formed by a plurality of LED connection in series-parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200770811U CN202475884U (en) | 2012-03-02 | 2012-03-02 | Light emitting diode (LED) driving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200770811U CN202475884U (en) | 2012-03-02 | 2012-03-02 | Light emitting diode (LED) driving device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202475884U true CN202475884U (en) | 2012-10-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200770811U Expired - Fee Related CN202475884U (en) | 2012-03-02 | 2012-03-02 | Light emitting diode (LED) driving device |
Country Status (1)
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|---|---|
| CN (1) | CN202475884U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102612223A (en) * | 2012-03-02 | 2012-07-25 | 苏州浩森电子科技有限公司 | LED driving device and control method thereof |
| CN103152948A (en) * | 2013-03-11 | 2013-06-12 | 东莞市桑和照明电器有限公司 | Lamp controller with stepping control |
| CN103256509A (en) * | 2013-05-22 | 2013-08-21 | 北京铨富光电科技有限公司 | Sectional type LED dimming lamp without externally arranged dimmer and dimming method thereof |
| CN110677956A (en) * | 2019-10-15 | 2020-01-10 | 横店集团得邦照明股份有限公司 | LED circuit with silicon controlled rectifier dimming and switch section switching and implementation method thereof |
-
2012
- 2012-03-02 CN CN2012200770811U patent/CN202475884U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102612223A (en) * | 2012-03-02 | 2012-07-25 | 苏州浩森电子科技有限公司 | LED driving device and control method thereof |
| WO2013127031A1 (en) * | 2012-03-02 | 2013-09-06 | 苏州浩森电子科技有限公司 | Led drive device and control method therefor |
| CN103152948A (en) * | 2013-03-11 | 2013-06-12 | 东莞市桑和照明电器有限公司 | Lamp controller with stepping control |
| CN103256509A (en) * | 2013-05-22 | 2013-08-21 | 北京铨富光电科技有限公司 | Sectional type LED dimming lamp without externally arranged dimmer and dimming method thereof |
| CN103256509B (en) * | 2013-05-22 | 2014-10-29 | 北京铨富光电科技有限公司 | Sectional type LED dimming lamp without externally arranged dimmer and dimming method thereof |
| CN110677956A (en) * | 2019-10-15 | 2020-01-10 | 横店集团得邦照明股份有限公司 | LED circuit with silicon controlled rectifier dimming and switch section switching and implementation method thereof |
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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: 20121003 Termination date: 20150302 |
|
| EXPY | Termination of patent right or utility model |