CN203951638U - A kind of circuit of LED lamp driver - Google Patents
A kind of circuit of LED lamp driver Download PDFInfo
- Publication number
- CN203951638U CN203951638U CN201420361588.9U CN201420361588U CN203951638U CN 203951638 U CN203951638 U CN 203951638U CN 201420361588 U CN201420361588 U CN 201420361588U CN 203951638 U CN203951638 U CN 203951638U
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- capacitor
- led lamp
- diode
- circuit
- lamp driver
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Abstract
The utility model discloses a kind of circuit of 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; LED lamp, is comprised 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.The circuit of LED lamp driver of the present utility model, 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.
Description
Technical field
The utility model relates to a kind of lamp circuit, relates in particular to a kind of circuit of LED lamp driver.
Background technology
Progress along with lighting technology, the application of green light source is more and more outstanding, the light-emitting diode (LED) of take is 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, the product that the LED of take is 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, so alternating current must be become to direct current, could adapt to their and use, non-insulating power supply be the alternating-current direct of 220V connected electric capacity come current limliting step-down by bridge rectifier again filtering to LED lamp, light; 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-purpose, exists the defects such as the driving power scope of application is not wide.
Utility model content
An object of the present utility model is to provide a kind of circuit of LED lamp driver, thereby overcomes the defect that drive circuit in prior art can only drive certain power bracket LED lamp.
For achieving the above object, the utility model 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 comprised 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.
The beneficial effects of the utility model: the circuit of LED lamp driver of the present utility model, 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 utility model, 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.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the LED lamp driver of the utility model embodiment 1.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail, but is to be understood that protection range of the present utility model 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 when 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 the utility model LED lamp driver 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 when positive half cycle or negative half period, when positive half cycle, the electric current of alternating current charges to C1, when negative half period, to C2, charge, two electric capacity is charging and discharging in turn, when electric capacity is full of electricity, be exactly the voltage of a power supply, during capacitor discharge and supply voltage be superimposed, the twice that voltage is primary voltage.When circuit is 1W for the LED lamp driving, on LED lamp, only has the voltage drop consumption of volt more than 3 on lamp; When circuit is 70W for the LED lamp driving, the voltage drop that has volt more than 200 on lamp, 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 utility model is for the object with illustration is described.These descriptions not want the utility model 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 utility model and practical application thereof, thereby made those skilled in the art can realize and utilize various exemplary of the present utility model and various selection and change.Scope of the present utility model 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 comprised 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 |
|---|---|---|---|
| CN201420361588.9U CN203951638U (en) | 2014-06-30 | 2014-06-30 | A kind of circuit of LED lamp driver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420361588.9U CN203951638U (en) | 2014-06-30 | 2014-06-30 | A kind of circuit of LED lamp driver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203951638U true CN203951638U (en) | 2014-11-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420361588.9U Expired - Fee Related CN203951638U (en) | 2014-06-30 | 2014-06-30 | A kind of circuit of LED lamp driver |
Country Status (1)
| Country | Link |
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| CN (1) | CN203951638U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104053264A (en) * | 2014-06-30 | 2014-09-17 | 吴文武 | Circuit of LED lamp driver |
-
2014
- 2014-06-30 CN CN201420361588.9U patent/CN203951638U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104053264A (en) * | 2014-06-30 | 2014-09-17 | 吴文武 | Circuit of LED lamp driver |
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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: 20141119 Termination date: 20180630 |
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| CF01 | Termination of patent right due to non-payment of annual fee |