CN105407576A - LED drive circuit - Google Patents
LED drive circuit Download PDFInfo
- Publication number
- CN105407576A CN105407576A CN201510954265.XA CN201510954265A CN105407576A CN 105407576 A CN105407576 A CN 105407576A CN 201510954265 A CN201510954265 A CN 201510954265A CN 105407576 A CN105407576 A CN 105407576A
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- CN
- China
- Prior art keywords
- circuit
- led drive
- drive circuit
- resistance
- diode
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Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/40—Details of LED load circuits
- H05B45/44—Details of LED load circuits with an active control inside an LED matrix
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
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- Circuit Arrangement For Electric Light Sources In General (AREA)
- Led Devices (AREA)
Abstract
The invention relates to an LED drive circuit, which comprises a rectifier circuit, a spike suppression damping circuit and an LED drive circuit body, wherein the LED drive circuit body is used for receiving an electric signal subjected to spike suppression and driving an LED load by the electric signal subjected to the spike suppression; the rectifier circuit comprises a fuse F1 and a rectifier bridge; the spike suppression damping circuit comprises a resistor R1, a capacitor C1 and a diode D5; an alternating current end of the rectifier bridge is connected with a cathode of an alternating current power supply through the fuse F1; another alternating current end of the rectifier bridge is connected with an anode of the alternating current power supply; the resistor R1 and the capacitor C1 are connected to a direct current output end of the rectifier circuit in parallel after being connected in series; the anode of the diode D5 is connected with a node between the resistor R1 and the capacitor C1; and the cathode of the diode D5 is connected with a direct current cathode end of the rectifier bridge. The LED drive circuit can adapt to a change of an input voltage within a relatively large range and the relatively large range of the load; and the condition that an LED load flashing light is abnormal can be solved.
Description
Technical field
The present invention relates to LED technology field, be specifically related to a kind of LED drive circuit.
Background technology
LED(LightEmittingDiode) namely illumination is LED lighting, is a kind of semiconducting solid luminescent device.It utilizes solid semiconductor chip as luminescent material, releases superfluous energy in the semiconductors and cause photo emissions, directly send the light of red, green, blue or white by charge carrier generation compound.LED illumination product utilizes LED as the produced ligthing paraphernalia of light source exactly.
The input voltage range that traditional LED drive circuit can accept on the one hand is narrower, when input voltage changes in relative broad range, easily causes the damage of LED and power supply and drive circuit; Its load regulation is poor on the other hand, and electric current can be caused when load change is larger unstable.
Summary of the invention
A kind of input voltage that can adapt to is the object of the present invention is to provide to change in relative broad range and the LED drive circuit changed in a big way of load.
For achieving the above object, present invention employs following technical scheme: comprise rectification circuit, peak restrained antihunt circuit and LED drive circuit, described LED drive circuit, for receiving the signal of telecommunication through peak restrained, and utilizes the signal of telecommunication through peak restrained to carry out driving LED load, described rectification circuit comprises fuse F1 and by diode D1, D2, the rectifier bridge of D3 and D4 composition, described peak restrained antihunt circuit comprises resistance R1, electric capacity C1 and diode D5, interchange one end of described rectifier bridge is connected with AC power negative pole through fuse F1, another of rectifier bridge hands over end to be connected with the positive pole of AC power, described resistance R1 and electric capacity C1 is connected in parallel on the DC output end of rectification circuit after connecting, the anode of described diode D5 is connected with the node between resistance R1 and electric capacity C1, its negative electrode is connected with the direct current negative pole end of rectifier bridge, the cathode output end ground connection of described rectification circuit, the cathode output end of described rectification circuit is connected with the negative pole of load circuit, the positive pole of load circuit is connected with LED drive circuit.
Described LED drive circuit comprises control circuit and switching circuit, described control circuit comprises control chip U1, resistance R2, R3, R4 and electric capacity C2, described switching circuit comprises inductance L 1, diode D6 and electric capacity C3, the power end of described control chip U1 is connected with the output negative pole end of rectification circuit through resistance R3, the input pin of control chip U1 is connected with its earth terminal through resistance R2 successively, the control end of control chip U1 is connected with the output negative pole end of rectification circuit through inductance L 1, the anode of described diode D6 is connected with the control end of control chip U1, its negative electrode is connected with the output negative pole end of rectification circuit through electric capacity C3, the positive pole of LED load circuit is connected with the power end of control chip U1 through resistance R4.
Described control chip U1 adopts pulse-width modulation PWM chip.
As shown from the above technical solution, the present invention can not only adapt to input voltage change in relative broad range and load in a big way, and LED load flashing lamp abnormal conditions can be solved.In addition, LED drive circuit provided by the present invention has less number of components, and therefore structure is simple, and cost is lower.
Accompanying drawing explanation
Fig. 1 is circuit diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described:
As shown in Figure 1, the LED drive circuit of the present embodiment, comprises rectification circuit 1, peak restrained antihunt circuit 2 and LED drive circuit 3, LED drive circuit, for receiving the signal of telecommunication through peak restrained, and the signal of telecommunication through peak restrained is utilized to carry out driving LED load, rectification circuit 1 comprises fuse F1 and by diode D1, D2, the rectifier bridge of D3 and D4 composition, peak restrained antihunt circuit 2 comprises resistance R1, electric capacity C1 and diode D5, interchange one end of rectifier bridge is connected with AC power negative pole through fuse F1, another of rectifier bridge hands over end to be connected with the positive pole of AC power, resistance R1 and electric capacity C1 is connected in parallel on the DC output end of rectification circuit 1 after connecting, the anode of diode D5 is connected with the node between resistance R1 and electric capacity C1, its negative electrode is connected with the direct current negative pole end of rectifier bridge, the cathode output end ground connection of rectification circuit 1, the cathode output end of rectification circuit 1 is connected with the negative pole of load circuit, the positive pole of load circuit is connected with LED drive circuit.
This LED drive circuit comprises control circuit 3 and switching circuit 4, control circuit 3 comprises control chip U1, resistance R2, R3, R4 and electric capacity C2, switching circuit 4 comprises inductance L 1, diode D6 and electric capacity C3, the power end VDD of control chip U1 is connected with the output negative pole end of rectification circuit 1 through resistance R3, the input pin CS of control chip U1 is connected with its earth terminal through resistance R2 successively, the control end DRAIN of control chip U1 is connected with the output negative pole end of rectification circuit 1 through inductance L 1, the anode of diode D6 is connected with the control end DRAIN of control chip U1, its negative electrode is connected with the output negative pole end of rectification circuit 1 through electric capacity C3, the positive pole of LED load 5 circuit is connected with the power end VDD of control chip U1 through resistance R4.In the present embodiment, control chip U1 adopts pulse-width modulation PWM chip.
When ac signal is connected, peak current flow through resistance R1 and electric capacity C1 and suppressed or decay.When LED drive circuit is powered, electric current flows through electric capacity C1 and diode D5, and then is provided to LED drive circuit, now because electric current is not through the first resistance R1, thus do not have current loss, thus system effectiveness is higher.
Above-described embodiment is only be described the preferred embodiment of the present invention; not scope of the present invention is limited; under not departing from the present invention and designing the prerequisite of spirit; the various distortion that those of ordinary skill in the art make technical scheme of the present invention and improvement, all should fall in protection range that claims of the present invention determines.
Claims (3)
1. a LED drive circuit, it is characterized in that: comprise rectification circuit, peak restrained antihunt circuit and LED drive circuit, described LED drive circuit, for receiving the signal of telecommunication through peak restrained, and utilizes the signal of telecommunication through peak restrained to carry out driving LED load, described rectification circuit comprises fuse F1 and by diode D1, D2, the rectifier bridge of D3 and D4 composition, described peak restrained antihunt circuit comprises resistance R1, electric capacity C1 and diode D5, interchange one end of described rectifier bridge is connected with AC power negative pole through fuse F1, another of rectifier bridge hands over end to be connected with the positive pole of AC power, described resistance R1 and electric capacity C1 is connected in parallel on the DC output end of rectification circuit after connecting, the anode of described diode D5 is connected with the node between resistance R1 and electric capacity C1, its negative electrode is connected with the direct current negative pole end of rectifier bridge, the cathode output end ground connection of described rectification circuit, the cathode output end of described rectification circuit is connected with the negative pole of load circuit, the positive pole of load circuit is connected with LED drive circuit.
2. LED drive circuit according to claim 1, it is characterized in that: described LED drive circuit comprises control circuit and switching circuit, described control circuit comprises control chip U1, resistance R2, R3, R4 and electric capacity C2, described switching circuit comprises inductance L 1, diode D6 and electric capacity C3, the power end of described control chip U1 is connected with the output negative pole end of rectification circuit through resistance R3, the input pin of control chip U1 is connected with its earth terminal through resistance R2 successively, the control end of control chip U1 is connected with the output negative pole end of rectification circuit through inductance L 1, the anode of described diode D6 is connected with the control end of control chip U1, its negative electrode is connected with the output negative pole end of rectification circuit through electric capacity C3, the positive pole of LED load circuit is connected with the power end of control chip U1 through resistance R4.
3. LED drive circuit according to claim 2, is characterized in that: described control chip U1 adopts pulse-width modulation PWM chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510954265.XA CN105407576A (en) | 2015-12-20 | 2015-12-20 | LED drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510954265.XA CN105407576A (en) | 2015-12-20 | 2015-12-20 | LED drive circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105407576A true CN105407576A (en) | 2016-03-16 |
Family
ID=55472752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510954265.XA Pending CN105407576A (en) | 2015-12-20 | 2015-12-20 | LED drive circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105407576A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1917728A (en) * | 2005-08-18 | 2007-02-21 | 赵璟怡 | Illuminating of lamplight-emitting diode suitable to AC electric supply |
| EP1919261A1 (en) * | 2006-10-30 | 2008-05-07 | Alcatel Lucent | Low frequency, constant current control circuit for power leds |
| CN201075828Y (en) * | 2007-06-28 | 2008-06-18 | 东莞市乐邦电子有限公司 | Switch power source of machine for making soya-bean milk |
| CN102403712A (en) * | 2011-11-22 | 2012-04-04 | 奇瑞汽车股份有限公司 | Processing circuit for phase shifted full bridge diode peak in on-board charger |
| CN202979395U (en) * | 2012-11-27 | 2013-06-05 | 昂宝电子（上海）有限公司 | Novel LED driving circuit |
| CN203015227U (en) * | 2012-12-28 | 2013-06-19 | 伊戈尔电气股份有限公司 | Buffer current limiting circuit of improved LED lamp DC power supply |
-
2015
- 2015-12-20 CN CN201510954265.XA patent/CN105407576A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1917728A (en) * | 2005-08-18 | 2007-02-21 | 赵璟怡 | Illuminating of lamplight-emitting diode suitable to AC electric supply |
| EP1919261A1 (en) * | 2006-10-30 | 2008-05-07 | Alcatel Lucent | Low frequency, constant current control circuit for power leds |
| CN201075828Y (en) * | 2007-06-28 | 2008-06-18 | 东莞市乐邦电子有限公司 | Switch power source of machine for making soya-bean milk |
| CN102403712A (en) * | 2011-11-22 | 2012-04-04 | 奇瑞汽车股份有限公司 | Processing circuit for phase shifted full bridge diode peak in on-board charger |
| CN202979395U (en) * | 2012-11-27 | 2013-06-05 | 昂宝电子（上海）有限公司 | Novel LED driving circuit |
| CN203015227U (en) * | 2012-12-28 | 2013-06-19 | 伊戈尔电气股份有限公司 | Buffer current limiting circuit of improved LED lamp DC power supply |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160316 |
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| RJ01 | Rejection of invention patent application after publication |