CN204598396U - A kind of LED voltage increase and current constant drive unit based on discrete component - Google Patents
A kind of LED voltage increase and current constant drive unit based on discrete component Download PDFInfo
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- CN204598396U CN204598396U CN201520263613.4U CN201520263613U CN204598396U CN 204598396 U CN204598396 U CN 204598396U CN 201520263613 U CN201520263613 U CN 201520263613U CN 204598396 U CN204598396 U CN 204598396U
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Abstract
The utility model discloses a kind of LED voltage increase and current constant drive unit based on discrete component, comprise battery charging circuit and light source igniting circuit, described battery charging circuit is connected with light source igniting circuit, described battery charging circuit comprises alternating current input P, resistance R1, electric capacity C1, insurance RD, rectifier diode D1, D2, D3, D4, storage battery W, described light source igniting circuit comprises K switch, electric capacity C2, C3, C4, resistance R2, R3, R4, R5, R6, triode Q1, Q2, Q3, diode D5, light-emitting diode D6, D7, D8, D9, D10, D11, transformer B.The mode that the utility model adopts voltage increase and current constant to drive, by the 4V voltage of storage battery, supply power voltage needed for LED and electric current is raised by Switching Power Supply transformation, driving LED lamp pearl is luminous, and in the normal voltage range of battery tension, the constant current-supplying of LED can be kept, keep brightness constant, extend the life-span of LED.
Description
Technical field
The utility model relates to a kind of LED drive circuit, specifically, is a kind of LED voltage increase and current constant drive unit based on discrete component.
Background technology
LED illumination lamp is a kind of novel energy-conserving lighting apparatus, compared with conventional incandescent, and energy-conservation more than 80%, be widely used in modern illumination not standby.LED night lamp is also the one of LED illumination device, it is by charging electric power storage energy storage, storage battery is generally 4V storage battery, the operating voltage of LED lamp bead is about 3.1V, the driving method that LED night lamp generally all adopts series resistance current limliting to power, the resistance of this driving method series connection inherently consumes certain electric energy, electric energy is not utilized fully, this driving method is when accumulator electric-quantity foot in addition, LED brightness is high, when electricity declines, the brightness of LED will decline thereupon, and brightness is unstable.
Summary of the invention
The utility model solves the deficiencies in the prior art, provides a kind of LED voltage increase and current constant drive unit based on discrete component of energy-conservation, constant current-supplying.
In order to achieve the above object, the technical scheme that the utility model adopts is:
Based on a LED voltage increase and current constant drive unit for discrete component, comprise battery charging circuit and light source igniting circuit, described battery charging circuit is connected with light source igniting circuit, and described battery charging circuit comprises alternating current input P, resistance R1, electric capacity C1, insurance RD, rectifier diode D1, D2, D3, D4, storage battery W, described alternating current input P mono-tunnel is connected between rectifier diode D1 positive pole and rectifier diode D3 negative pole after connecting with electric capacity C1, resistance R1 is connected in parallel on electric capacity C1 two ends, another road is connected between rectifier diode D2 positive pole and rectifier diode D4 negative pole after insurance RD, be connected with storage battery W positive pole after described rectifier diode D1 negative pole is connected with rectifier diode D2 negative pole, be connected with storage battery W negative pole after rectifier diode D3 positive pole is connected with rectifier diode D4 positive pole, described light source igniting circuit comprises K switch, electric capacity C2, C3, C4, resistance R2, R3, R4, R5, R6, triode Q1, Q2, Q3, rectifier diode D5, light-emitting diode D6, D7, D8, D9, D10, D11, transformer B, described storage battery W positive pole is connected with K switch one end, negative pole is connected with electric capacity C2 one end, the K switch other end is connected with the other end of electric capacity C2, one end of electric capacity C2 is connected with resistance R2 one end, the resistance R2 other end one tunnel is connected with triode Q1 base stage, another road is connected with resistance C3 one end, triode Q1 emitter is connected with resistance R3 one end, the resistance R3 other end is connected with transformer B one end, collector electrode one tunnel is connected with triode Q3 base stage, another road is connected with triode Q2 collector electrode, triode Q2 emitter is connected between resistance R2 one end and resistance R4 one end, triode Q2 base stage one tunnel is connected with triode Q3 emitter, another road is connected with the resistance R4 other end, triode Q3 collector electrode one tunnel is connected with the transformer other end, another road is connected with the electric capacity C3 other end, the electric capacity C3 other end is connected with rectifier diode D5 positive pole, rectifier diode D5 negative pole one tunnel is connected with electric capacity C4 one end, another road is connected with resistance R5 one end, the electric capacity C4 other end is connected with triode Q3 emitter, the resistance R5 other end is connected with one end of electric capacity C3, another road resistance R6 is connected to the two ends of electric capacity C4, resistance R5 one end is connected with light-emitting diode D6 positive pole, the electric capacity C4 other end is connected with light-emitting diode D11 negative pole, described light-emitting diode D6, D7, D8, D9, D10, D11 connects.
Further, described electric capacity C1 is decompression capacitor, and electric capacity C2 is decoupling capacitor, and electric capacity C3 is feedback capacity, and electric capacity C4 is filter capacitor; Described resistance R1 is the discharge resistance of electric capacity C1, and resistance R3 is the emitter resistance of Q1, and resistance R4 is current-limiting resistance, and resistance R2, R5 are the base stage supplying resistance of Q1, and resistance R6 is the discharge resistance of electric capacity C4; Described triode Q1 is Q3 is drive triode, and triode Q2 is Current limited Control triode, and triode Q3 is switch output triode.
The mode that the utility model adopts voltage increase and current constant to drive, by the 4V voltage of storage battery, raises supply power voltage for LED needed for and electric current by Switching Power Supply transformation, the luminescence of driving LED lamp pearl.The driving method that relative employing series resistance current limliting is powered, the driving of this LED voltage increase and current constant can be accomplished more energy-conservation, and in the normal voltage range of battery tension, can keep the constant current-supplying of LED, keeps brightness constant.
Accompanying drawing explanation
Fig. 1 circuit theory diagrams of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described:
As shown in Figure 1, a kind of LED voltage increase and current constant drive unit based on discrete component, comprise battery charging circuit and light source igniting circuit, described battery charging circuit is connected with light source igniting circuit, and described battery charging circuit comprises alternating current input P, resistance R1, electric capacity C1, insurance RD, rectifier diode D1, D2, D3, D4, storage battery W, described alternating current input P mono-tunnel is connected between rectifier diode D1 positive pole and rectifier diode D3 negative pole after connecting with electric capacity C1, resistance R1 is connected in parallel on electric capacity C1 two ends, another road is connected between rectifier diode D2 positive pole and rectifier diode D4 negative pole after insurance RD, be connected with storage battery W positive pole after described rectifier diode D1 negative pole is connected with rectifier diode D2 negative pole, be connected with storage battery W negative pole after rectifier diode D3 positive pole is connected with rectifier diode D4 positive pole, described light source igniting circuit comprises K switch, electric capacity C2, C3, C4, resistance R2, R3, R4, R5, R6, triode Q1, Q2, Q3, rectifier diode D5, light-emitting diode D6, D7, D8, D9, D10, D11, transformer B, described storage battery W positive pole is connected with K switch one end, negative pole is connected with electric capacity C2 one end, the K switch other end is connected with the other end of electric capacity C2, one end of electric capacity C2 is connected with resistance R2 one end, the resistance R2 other end one tunnel is connected with triode Q1 base stage, another road is connected with resistance C3 one end, triode Q1 emitter is connected with resistance R3 one end, the resistance R3 other end is connected with transformer B one end, collector electrode one tunnel is connected with triode Q3 base stage, another road is connected with triode Q2 collector electrode, triode Q2 emitter is connected between resistance R2 one end and resistance R4 one end, triode Q2 base stage one tunnel is connected with triode Q3 emitter, another road is connected with the resistance R4 other end, triode Q3 collector electrode one tunnel is connected with the transformer other end, another road is connected with the electric capacity C3 other end, the electric capacity C3 other end is connected with rectifier diode D5 positive pole, rectifier diode D5 negative pole one tunnel is connected with electric capacity C4 one end, another road is connected with resistance R5 one end, the electric capacity C4 other end is connected with triode Q3 emitter, the resistance R5 other end is connected with one end of electric capacity C3, another road resistance R6 is connected to the two ends of electric capacity C4, resistance R5 one end is connected with light-emitting diode D6 positive pole, the electric capacity C4 other end is connected with light-emitting diode D11 negative pole, described light-emitting diode D6, D7, D8, D9, D10, D11 connects.
Further, described electric capacity C1 is decompression capacitor, and electric capacity C2 is decoupling capacitor, and electric capacity C3 is feedback capacity, and electric capacity C4 is filter capacitor; Described resistance R1 is the discharge resistance of electric capacity C1, and resistance R3 is the emitter resistance of Q1, and resistance R4 is current-limiting resistance, and resistance R2, R5 are the base stage supplying resistance of Q1, and resistance R6 is the discharge resistance of electric capacity C4; Described triode Q1 is Q3 is drive triode, and triode Q2 is Current limited Control triode, and triode Q3 is switch output triode.
As shown in Figure 1, operation principle of the present utility model is as follows:
Open K switch, the cathode voltage of storage battery W arrives the collector electrode of triode Q3 through K switch, inductance B, triode Q1, Q3, inductance B, resistance R2, R3, electric capacity C3 form positive feedback oscillating circuit jointly, feedback path is, Q1 base stage → Q1 collector electrode → Q3 base stage → Q3 collector electrode → electric capacity C3 → Q1 base stage, in the duration of oscillation, the inverse electromotive force that inductance B produces, through diode D5 commutation capacitor C4 filtering, then driving LED light-emitting diode D6 to D11 is luminous.
In FIG, resistance R5 is negative voltage feedback resistance, upper voltage limit value on control capacitance C4, namely control the higher limit of the voltage of driving LED light-emitting diode, when outputting to the overtension on C4, the positive voltage of C4 anode will feed back to the base stage of triode Q1 by resistance R5, the base voltage of Q1 is also raised, correspondingly reduce the quiescent operation point voltage of Q1, thus make the voltage drop that outputs on C4, remain in a normal voltage value.
In FIG, triode Q2, resistance R4 are Current Negative Three-Point Capacitance element, namely current limiting element, when the electric current outputting to LED light-emitting diode D6 to D11 is excessive, the voltage drop also corresponding rising produced at resistance R4 two ends, the voltage at R4 two ends is input to the base stage of triode Q2, the collector voltage of Q2 is declined, and the collector electrode of Q2 is connected with the base stage of Q3, correspondingly reduces the base voltage of Q3, thus the electric current outputting to LED light-emitting diode is reduced, remain on setting current value.
So just achieve the object of LED light-emitting diode constant current-supplying, saved electric energy on the one hand, ensure that the constant current-supplying of LED light-emitting diode on the other hand, make LED light-emitting diode luminance constant, extend the useful life of LED light-emitting diode simultaneously.
Claims (4)
1. based on a LED voltage increase and current constant drive unit for discrete component, comprise battery charging circuit and light source igniting circuit, described battery charging circuit is connected with light source igniting circuit, and described battery charging circuit comprises alternating current input P, resistance R1, electric capacity C1, insurance RD, rectifier diode D1, D2, D3, D4, storage battery W, described alternating current input P mono-tunnel is connected between rectifier diode D1 positive pole and rectifier diode D3 negative pole after connecting with electric capacity C1, resistance R1 is connected in parallel on electric capacity C1 two ends, another road is connected between rectifier diode D2 positive pole and rectifier diode D4 negative pole after insurance RD, be connected with storage battery W positive pole after described rectifier diode D1 negative pole is connected with rectifier diode D2 negative pole, be connected with storage battery W negative pole after rectifier diode D3 positive pole is connected with rectifier diode D4 positive pole, it is characterized in that, described light source igniting circuit comprises K switch, electric capacity C2, C3, C4, resistance R2, R3, R4, R5, R6, triode Q1, Q2, Q3, rectifier diode D5, light-emitting diode D6, D7, D8, D9, D10, D11, inductance B, described storage battery W positive pole is connected with K switch one end, negative pole is connected with electric capacity C2 one end, the K switch other end is connected with the other end of electric capacity C2, one end of electric capacity C2 is connected with resistance R2 one end, the resistance R2 other end one tunnel is connected with triode Q1 base stage, another road is connected with resistance C3 one end, triode Q1 emitter is connected with resistance R3 one end, the resistance R3 other end is connected with inductance B one end, collector electrode one tunnel is connected with triode Q3 base stage, another road is connected with triode Q2 collector electrode, triode Q2 emitter is connected between resistance R2 one end and resistance R4 one end, triode Q2 base stage one tunnel is connected with triode Q3 emitter, another road is connected with the resistance R4 other end, triode Q3 collector electrode one tunnel is connected with the transformer other end, another road is connected with the electric capacity C3 other end, the electric capacity C3 other end is connected with rectifier diode D5 positive pole, rectifier diode D5 negative pole one tunnel is connected with electric capacity C4 one end, another road is connected with resistance R5 one end, the electric capacity C4 other end is connected with triode Q3 emitter, the resistance R5 other end is connected with one end of electric capacity C3, another road resistance R6 is connected to the two ends of electric capacity C4, resistance R5 one end is connected with light-emitting diode D6 positive pole, the electric capacity C4 other end is connected with light-emitting diode D11 negative pole, described light-emitting diode D6, D7, D8, D9, D10, D11 connects.
2. the LED voltage increase and current constant drive unit based on discrete component according to claim 1, it is characterized in that, described electric capacity C1 is decompression capacitor, and electric capacity C2 is decoupling capacitor, and electric capacity C3 is feedback capacity, and electric capacity C4 is filter capacitor.
3. the LED voltage increase and current constant drive unit based on discrete component according to claim 1 and 2, it is characterized in that, described resistance R1 is the discharge resistance of electric capacity C1, resistance R3 is the emitter resistance of Q1, resistance R4 is current-limiting resistance, resistance R2, R5 are the base stage supplying resistance of Q1, and resistance R6 is the discharge resistance of electric capacity C4.
4. the LED voltage increase and current constant drive unit based on discrete component according to claim 1, is characterized in that, described triode Q1 is Q3 is drive triode, and triode Q2 is Current limited Control triode, and triode Q3 is switch output triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520263613.4U CN204598396U (en) | 2015-04-28 | 2015-04-28 | A kind of LED voltage increase and current constant drive unit based on discrete component |
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| CN201520263613.4U CN204598396U (en) | 2015-04-28 | 2015-04-28 | A kind of LED voltage increase and current constant drive unit based on discrete component |
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| CN204598396U true CN204598396U (en) | 2015-08-26 |
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| CN201520263613.4U Withdrawn - After Issue CN204598396U (en) | 2015-04-28 | 2015-04-28 | A kind of LED voltage increase and current constant drive unit based on discrete component |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104797031A (en) * | 2015-04-28 | 2015-07-22 | 卫斌鹏 | LED booster constant-current driving circuit |
| CN108173429A (en) * | 2017-12-23 | 2018-06-15 | 马良彬 | A kind of outdoor construction moves booster power |
-
2015
- 2015-04-28 CN CN201520263613.4U patent/CN204598396U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104797031A (en) * | 2015-04-28 | 2015-07-22 | 卫斌鹏 | LED booster constant-current driving circuit |
| CN104797031B (en) * | 2015-04-28 | 2017-12-05 | 泉州泉港灿鹏机械设备有限公司 | LED voltage increase and current constant driving circuits |
| CN108173429A (en) * | 2017-12-23 | 2018-06-15 | 马良彬 | A kind of outdoor construction moves booster power |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150826 Effective date of abandoning: 20171205 |