CN104053264A - Circuit of LED lamp driver - Google Patents
Circuit of LED lamp driver Download PDFInfo
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- CN104053264A CN104053264A CN201410308048.9A CN201410308048A CN104053264A CN 104053264 A CN104053264 A CN 104053264A CN 201410308048 A CN201410308048 A CN 201410308048A CN 104053264 A CN104053264 A CN 104053264A
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- lamp driver
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Abstract
The invention discloses a circuit of an LED lamp driver. The circuit comprises a first diode, a second diode, capacitors and an LED lamp, wherein the first diode is provided with the positive end and the negative end, the second diode is provided with the positive end and the negative end, the negative end is connected with the positive end of the first diode, a connecting point is connected with an alternating current power source, the capacitors include the capacitor C1 and the capacitor C2, the first end of the capacitor C1 is connected with the negative end of the first diode, the second end of the capacitor C1 is connected with the first end of the capacitor C2, a connecting joint of the capacitor C1 and the capacitor C2 is connected with the alternating current power source, the second end of the capacitor C2 is connected with the positive end of the second diode, the LED lamp is composed of a plurality of light-emitting diodes, the first end of the LED lamp is connected with the negative end of the first diode, and the second end of the LED lamp is connected with the positive end of the second diode. The circuit of the LED lamp driver is simple in structure, the LED lamp with power within the wide scope can be driven, currents in the circuit are stable, and the service life of the LED lamp is prolonged.
Description
Technical field
The present invention relates to a kind of lamp circuit, relate in particular to a kind of circuit of LED lamp driver.
Background technology
Along with the progress of lighting technology, the application of green light source is more and more outstanding, taking light-emitting diode (LED) as representative the 4th generation light source, because of the plurality of advantages such as have that luminous flux is high, structure is little and safe, energy-conservation, become the best light source that substitutes traditional lighting light source and selected.At present, product taking LED as lighting source is a lot, great majority are all to realize light source luminescent with constant-current driving LED, provide the equipment of power supply to be called driver to LED lamp, LED lamp driver is divided into two kinds: non-insulating power supply (being that capacitance-resistance drives) and insulating power supply (being Switching Power Supply driver), because of LED use is DC power supply, could adapt to their and use so alternating current must be become to direct current, non-insulating power supply be the alternating-current direct of 220V connected electric capacity come after current limliting step-down through bridge rectifier again filtering light to LED lamp; And insulating power supply is to realize variable-voltage power supply with the circuit of switch transformation to supply with to LED lamp, because there being the isolated of isolating transformer, high pressure 220V electricity does not directly have influence on illuminating lamp, and its transformation output provides power supply to after over commutation LED lamp.But these two kinds of driving powers all can only be given within the scope of specified power power supply is provided, be all generally the special design that is equipped with, specially lamp is special, exists the defects such as the driving power scope of application is not wide.
Summary of the invention
One object of the present invention is to provide a kind of circuit of LED lamp driver, thereby overcomes drive circuit in prior art and can only drive the defect of certain power bracket LED lamp.
For achieving the above object, the invention provides following technical scheme:
A circuit for LED lamp driver, comprising: the first diode, has a positive terminal and a negative pole end; The second diode, has a positive terminal and a negative pole end, and this negative pole end is connected with the positive pole of described the first diode, and this tie point is connected with AC power; Electric capacity, comprise capacitor C 1 and capacitor C 2, capacitor C 1 first end is connected with the first diode cathode end, and the second end is connected with capacitor C 2 first ends, and capacitor C 1 node connected with capacitor C 2 is connected with AC power, and the second end of capacitor C 2 is connected with the positive terminal of the second diode; Light emitting module, is made up of some light-emitting diodes, and this light emitting module first end is connected with described the first diode cathode end, and the second end is connected with described the second diode cathode end.
In technique scheme, between described the first diode cathode end and the second diode cathode end, connect an electrochemical capacitor C3.
In technique scheme, described electrochemical capacitor C3 is parallel with a resistance.
In technique scheme, described capacitor C 1 and the withstand voltage of capacitor C 2 be 400V and more than.
In technique scheme, the first described diode and the withstand voltage of the second diode be 400V and more than.
Beneficial effect of the present invention: the circuit of LED lamp driver of the present invention, in rectification circuit, access capacitor C 1 and C2, by capacitor C 1 and C2 charging and discharging in turn, alternating current all has electric current to pass through LED lamp in positive-negative half-cycle.The circuit of LED lamp driver of the present invention, its circuit structure is simple, can drive the LED lamp of relative broad range power, and current stabilization in circuit, extends the useful life of LED lamp.
Brief description of the drawings
Fig. 1 is the circuit diagram of the LED lamp driver of the embodiment of the present invention 1.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail, but is to be understood that protection scope of the present invention is not subject to the restriction of embodiment.
Unless separately there is other clearly to represent, otherwise in whole specification and claims, term " comprises " or its conversion was stated being understood to include as " comprising " or " including " etc. element or part, and do not get rid of other element or other part.
Embodiment 1
As shown in Figure 1, a kind of circuit of LED lamp driver, comprising: the first diode D1, has a positive terminal and a negative pole end; The second diode D2, has a positive terminal and a negative pole end, and this negative pole end is connected with the positive pole of described the first diode D1, and this tie point is connected with AC power; Electric capacity, comprise capacitor C 1 and capacitor C 2, capacitor C 1 first end is connected with the first diode D1 negative pole end, and the second end is connected with capacitor C 2 first ends, and capacitor C 1 node connected with capacitor C 2 is connected with AC power, and the second end of capacitor C 2 is connected with the positive terminal of the second diode D2; LED lamp, is composed in series by some light-emitting diodes, has a positive terminal and a negative pole end, and the positive terminal of this LED lamp is connected with described the first diode D1 negative pole end, and negative pole end is connected with the second diode D2 positive terminal.Between described the first diode cathode end and the second diode cathode end, connect an electrochemical capacitor C3, electrochemical capacitor C3 is parallel with a resistance R, transient switching in the time that LED lamp switches on power and produce unstable voltage and current time, electrochemical capacitor C3 plays the effect that can prevent that LED lamp from damaging, also play the effect of filtering, resistance R, after deenergization, bleeds off the accumulate of electrochemical capacitor C3.
The circuit working principle of LED lamp driver of the present invention is as follows: as shown in Figure 1, when the power supply of alternating current is during in positive half cycle, electric current is by the first diode D1, one branch current flows back to power supply through capacitor C 1, capacitor C 1 is charged, another branch current process LED lamp, electrochemical capacitor C3 and resistance R, then flow back to power supply through capacitor C 2; When the power supply of alternating current is during in negative half period, a branch current flows back to power supply through capacitor C 2, capacitor C 2 is charged, and another branch road, for through C1, then passes through LED lamp, electrochemical capacitor C3, resistance R, then flows back to power supply by D2.Be that electric current all has electric current through LED lamp in the time of positive half cycle or negative half period, in the time of positive half cycle, the electric current of alternating current charges to C1, in the time of negative half period, charge to C2, two electric capacity charging and discharging in turn, in the time that electric capacity is full of electricity, be exactly the voltage of a power supply, when capacitor discharge and supply voltage be superimposed, the twice that voltage is primary voltage.In the time that circuit is 1W for the LED lamp driving, on LED lamp, only have the voltage drop of volt more than 3 to consume on lamp; In the time that circuit is 70W for the LED lamp driving, on lamp, there is the voltage drop of volt more than 200, in circuit electric capacity and diode withstand voltage be four hectovolts and more than, even if the output of whole like this circuit does not have load lamp, direct short-circuit also can be born, can not break down, the element of mainly bearing current limliting and step-down in circuit is capacitor C 1 and C2.
The aforementioned description to concrete exemplary of the present invention is in order to illustrate and the object of illustration.These descriptions not want the present invention to be defined as disclosed precise forms, and obviously, according to above-mentioned instruction, can much change and change.Exemplary embodiment is selected and the object described is to explain certain principles of the present invention and practical application thereof, thereby made those skilled in the art can realize and utilize various exemplary of the present invention and various selection and change.Scope of the present invention is intended to be limited by claims and equivalents thereof.
Claims (5)
1. a circuit for LED lamp driver, is characterized in that, comprising:
The first diode, has a positive terminal and a negative pole end;
The second diode, has a positive terminal and a negative pole end, and this negative pole end is connected with the positive pole of described the first diode, and this tie point is connected with AC power;
Electric capacity, comprise capacitor C 1 and capacitor C 2, capacitor C 1 first end is connected with the first diode cathode end, and the second end is connected with capacitor C 2 first ends, and capacitor C 1 node connected with capacitor C 2 is connected with AC power, and the second end of capacitor C 2 is connected with the positive terminal of the second diode;
LED lamp, is made up of some light-emitting diodes, and described LED lamp first end is connected with described the first diode cathode end, and the second end is connected with described the second diode cathode end.
2. the circuit of LED lamp driver according to claim 1, is characterized in that, between described the first diode cathode end and the second diode cathode end, connects an electrochemical capacitor C3.
3. the circuit of LED lamp driver according to claim 2, is characterized in that, described electrochemical capacitor C3 is parallel with a resistance R.
4. the circuit of LED lamp driver according to claim 1, is characterized in that, described capacitor C 1 and the withstand voltage of capacitor C 2 be 400V and more than.
5. the circuit of LED lamp driver according to claim 1, is characterized in that, the first described diode and the withstand voltage of the second diode be 400V and more than.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410308048.9A CN104053264A (en) | 2014-06-30 | 2014-06-30 | Circuit of LED lamp driver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410308048.9A CN104053264A (en) | 2014-06-30 | 2014-06-30 | Circuit of LED lamp driver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104053264A true CN104053264A (en) | 2014-09-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201410308048.9A Pending CN104053264A (en) | 2014-06-30 | 2014-06-30 | Circuit of LED lamp driver |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101155447A (en) * | 2006-09-29 | 2008-04-02 | 启萌科技有限公司 | Illuminating device |
| CN201114882Y (en) * | 2007-08-03 | 2008-09-10 | 鹤山丽得电子实业有限公司 | A driving circuit for improved universal LED lighting bulb |
| CN201196345Y (en) * | 2008-05-29 | 2009-02-18 | 赵功克 | LED spot light suitable for AC commercial power |
| CN103152913A (en) * | 2012-05-29 | 2013-06-12 | 四川新力光源股份有限公司 | Alternating current rectifying circuit and alternating current rectifying method for driving light-emitting diode (LED) module |
| US20130307416A1 (en) * | 2012-05-21 | 2013-11-21 | Lizhi Xu | Open circuit protecting circuit, open circuit protecting method and illuminating apparatus |
| WO2014117606A1 (en) * | 2013-01-31 | 2014-08-07 | 四川新力光源股份有限公司 | Alternating current rectifying circuit and alternating current rectifying method for driving led module |
| CN203951638U (en) * | 2014-06-30 | 2014-11-19 | 吴文武 | A kind of circuit of LED lamp driver |
-
2014
- 2014-06-30 CN CN201410308048.9A patent/CN104053264A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101155447A (en) * | 2006-09-29 | 2008-04-02 | 启萌科技有限公司 | Illuminating device |
| CN201114882Y (en) * | 2007-08-03 | 2008-09-10 | 鹤山丽得电子实业有限公司 | A driving circuit for improved universal LED lighting bulb |
| CN201196345Y (en) * | 2008-05-29 | 2009-02-18 | 赵功克 | LED spot light suitable for AC commercial power |
| US20130307416A1 (en) * | 2012-05-21 | 2013-11-21 | Lizhi Xu | Open circuit protecting circuit, open circuit protecting method and illuminating apparatus |
| CN103152913A (en) * | 2012-05-29 | 2013-06-12 | 四川新力光源股份有限公司 | Alternating current rectifying circuit and alternating current rectifying method for driving light-emitting diode (LED) module |
| WO2014117606A1 (en) * | 2013-01-31 | 2014-08-07 | 四川新力光源股份有限公司 | Alternating current rectifying circuit and alternating current rectifying method for driving led module |
| CN203951638U (en) * | 2014-06-30 | 2014-11-19 | 吴文武 | A kind of circuit of LED lamp driver |
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Application publication date: 20140917 |