CN204090254U - A kind of LED power circuit - Google Patents
A kind of LED power circuit Download PDFInfo
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- CN204090254U CN204090254U CN201420619737.7U CN201420619737U CN204090254U CN 204090254 U CN204090254 U CN 204090254U CN 201420619737 U CN201420619737 U CN 201420619737U CN 204090254 U CN204090254 U CN 204090254U
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- 239000004065 semiconductor Substances 0.000 claims abstract description 31
- 239000003990 capacitor Substances 0.000 claims description 11
- 238000005516 engineering process Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
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Abstract
The utility model discloses a kind of LED power circuit, comprise the metal-oxide-semiconductor type surge restraint circuit be connected with alternating current source and the double-current drive circuit be connected with metal-oxide-semiconductor type surge circuit; Described metal-oxide-semiconductor type surge circuit comprises and is connected to the first dividing potential drop branch road between the live wire L of alternating current input power supplying and zero line N and the second dividing potential drop branch road, described double-current drive circuit comprises: diode D1, diode D2 and electric capacity C3, C4, C5 and LED module.Compared with prior art, the utility model circuit structure is simple, can drive the LED of relative broad range power, and can effectively suppress the surge current in circuit or other current perturbations well, improve the useful life of power circuit.
Description
Technical field
The utility model relates to LED drive circuit field, is specially a kind of LED power circuit.
Background technology
Along with the progress of lighting technology, the application of green light source is more and more outstanding, with the forth generation light source that light-emitting diode (LED) is representative, because of the plurality of advantages such as have that luminous flux is high, structure is little and safe, energy-conservation, the best light source having become alternative conventional illumination sources is selected.At present, the product taking LED as lighting source is a lot, great majority are all use constant-current driving LED to realize light source luminescent, the equipment of power supply is provided to be called driver to LED, LED lamp driver is divided into two kinds: non-isolated power supply (namely capacitance-resistance drives) and insulating power supply (i.e. Switching Power Supply driver), because LED uses DC power supply, so must alternating current become direct current could adapt to their use, non-isolated power supply be the alternating-current direct of 220V connected electric capacity carry out current limliting step-down after through bridge rectifier again filtering light to LED; And insulating power supply comes to supply to LED to realize variable-voltage power supply with the circuit of switch transformation, because there being the isolated of isolating transformer, high pressure 220V electricity has not directly had influence on illuminating lamp, and its transformation output provides power supply to LED after over commutation.But these two kinds of driving powers all can only be given within the scope of specified power provide power supply, and be all generally be equipped with design specially, special lamp is special, there is the defects such as the driving power scope of application is not wide.For overcoming these defects, the circuit of a Chinese patent CN104053264A LED lamp driver, comprising: the first diode, has a positive terminal and a negative pole end; Second diode, have a positive terminal and a negative pole end, this negative pole end is connected with the positive pole of described first diode, and this tie point is connected with AC power; Electric capacity, comprise electric capacity C1 and electric capacity C2, electric capacity C1 first end is connected with the first diode cathode end, and the second end is connected with electric capacity C2 first end, and the node that electric capacity C1 is connected with electric capacity C2 is connected with AC power, second end of electric capacity C2 is connected with the positive terminal of the second diode; LED, be made up of some light-emitting diodes, described LED first end is connected with described first diode cathode end, second end is connected with described second diode cathode end, this patent circuit structure is simple, the LED of relative broad range power can be driven, and current stabilization in circuit, extend the useful life of LED; But in real work, particularly alternating current input power supplying connects moment, in filter circuit, filter capacitor charges rapidly, so this peak current is far longer than stable state input current, namely surge current is produced, surge current not only shortens the life-span of filter capacitor, also has greater impact to whole drive circuit simultaneously, causes destructive damage.
Summary of the invention
The purpose of this utility model is to provide a kind of LED power circuit, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the utility model provides following technical scheme:
A kind of LED power circuit, comprises the metal-oxide-semiconductor type surge restraint circuit be connected with alternating current source and the double-current drive circuit be connected with metal-oxide-semiconductor type surge circuit; Described metal-oxide-semiconductor type surge circuit comprises and is connected to the first dividing potential drop branch road between the live wire L of alternating current input power supplying and zero line N and the second dividing potential drop branch road, this the first dividing potential drop branch road comprises and is serially connected in resistance R1 and resistance R2 between the live wire of alternating current input power supplying and zero line, and this second dividing potential drop branch road comprises and is serially connected in resistance R3 and resistance R4 between the live wire of alternating current input power supplying and zero line; Resistance R1 is connected with the common port of resistance R4 with resistance R3 with the common port of resistance R2; Second dividing potential drop branch road also comprises the capacitive branch in parallel with resistance R1, resistance R3, and this capacitive branch comprises electric capacity C1 and the electric capacity C2 of serial connection, and the second dividing potential drop branch road connects a metal-oxide-semiconductor Q1; The grid contact resistance R1 of metal-oxide-semiconductor Q1 and the common port of resistance R2, source electrode connects the live wire of alternating current input power supplying; Described double-current drive circuit comprises: diode D1, diode D2 and electric capacity C3, C4, C5 and LED module; The input of diode D1 is connected with the output of diode D2, and its tie point is connected with the drain electrode of described metal-oxide-semiconductor; The first end of electric capacity C4 is connected with the output of diode D1, and the second end is connected with the first end of electric capacity C5, and the node that electric capacity C4 is connected with electric capacity C5 is connected with the zero line of alternating current input power supplying, and second end of electric capacity C5 is connected with the input of diode D2; Described LED module is made up of some light-emitting diodes, and one end of this LED module is connected with the output of described diode D1, and the other end is connected with the input of described diode D2.
Further, described metal-oxide-semiconductor is P channel-type metal-oxide-semiconductor.
Further, between the source electrode and drain electrode of described metal-oxide-semiconductor Q1, be provided with resistance R5, resistance R5 is also connected with described capacitive branch.
Further, between the output and diode D2 input of described diode D1, connect an electrochemical capacitor C3, this electrochemical capacitor C3 resistance R6 in parallel.
Compared with prior art, the beneficial effects of the utility model are: the utility model circuit structure is simple, the LED of relative broad range power can be driven, and can effectively suppress the surge current in circuit or other current perturbations well, improve the useful life of power circuit.
Stream is stable, extends the useful life of LED
Accompanying drawing explanation
Fig. 1 is the circuit connection structure schematic diagram of a kind of LED power circuit of the utility model.
Embodiment
Be described in more detail below in conjunction with the technical scheme of embodiment to this patent.
Refer to Fig. 1, a kind of LED power circuit, comprise the metal-oxide-semiconductor type surge restraint circuit be connected with alternating current source and the double-current drive circuit be connected with metal-oxide-semiconductor type surge circuit; Described metal-oxide-semiconductor type surge circuit comprises and is connected to the first dividing potential drop branch road between the live wire L of alternating current input power supplying and zero line N and the second dividing potential drop branch road, this the first dividing potential drop branch road comprises and is serially connected in resistance R1 and resistance R2 between the live wire of alternating current input power supplying and zero line, and this second dividing potential drop branch road comprises and is serially connected in resistance R3 and resistance R4 between the live wire of alternating current input power supplying and zero line; Resistance R1 is connected with the common port of resistance R4 with resistance R3 with the common port of resistance R2; Second dividing potential drop branch road also comprises the capacitive branch in parallel with resistance R1, resistance R3, and this capacitive branch comprises electric capacity C1 and the electric capacity C2 of serial connection, and the second dividing potential drop branch road connects a P channel-type metal-oxide-semiconductor metal-oxide-semiconductor Q1; The grid contact resistance R1 of metal-oxide-semiconductor Q1 and the common port of resistance R2, source electrode connects the live wire of alternating current input power supplying, and between the source electrode and drain electrode of described metal-oxide-semiconductor Q1, be provided with resistance R5, resistance R5 is also connected with described capacitive branch; Described double-current drive circuit comprises: diode D1, diode D2 and electric capacity C3, C4, C5 and LED module; The input of diode D1 is connected with the output of diode D2, and its tie point is connected with the drain electrode of described metal-oxide-semiconductor; The first end of electric capacity C4 is connected with the output of diode D1, and the second end is connected with the first end of electric capacity C5, and the node that electric capacity C4 is connected with electric capacity C5 is connected with the zero line of alternating current input power supplying, and second end of electric capacity C5 is connected with the input of diode D2; Described LED module is made up of some light-emitting diodes, one end of this LED module is connected with the output of described diode D1, the other end is connected with the input of described diode D2, an electrochemical capacitor C3, this electrochemical capacitor C3 resistance R6 in parallel is connected between the output and diode D2 input of described diode D1.
The normally driving voltage of metal-oxide-semiconductor Q1 is generally at about 12V, thus select resistance R1 and resistance R2 ratio, alternating current input power supplying is fluctuated in working range, point pressure energy driven MOS pipe Q1 conducting on resistance R2, above-mentioned resistance R1, resistance R2, resistance R3 and resistance R4, and the value of electric capacity C1 and electric capacity C2 affects the ON time of power circuit startup to metal-oxide-semiconductor Q1, the ON time of OS transistor Q1 is longer, can suppress better to start surge current.
When the power supply of alternating current is in positive half cycle, electric current is by diode D1, and a branch current flows back to power supply through electric capacity C4, charges to electric capacity C4, and another branch current through LED, electrochemical capacitor C3, then flows back to power supply through electric capacity C5; When the power supply of alternating current is in negative half period, a branch current flows back to power supply through electric capacity C5, namely charges to electric capacity C5, and another branch road is through C4, then through LED, electrochemical capacitor C3, then flows back to power supply by D2.Namely electric current all has electric current through LED when positive half cycle or negative half period, when being in positive half cycle, the electric current of alternating current charges to C4, charge to C5 when being in negative half period, two electric capacity charging and discharging is in turn exactly the voltage of a power supply when electric capacity is full of electricity, during capacitor discharge and supply voltage be superimposed, voltage is the twice of primary voltage, when circuit is 1W for the LED that drives, LED only has the voltage drop consumption of volt more than 3 on lamp; When circuit is 70W for the LED that drives, lamp has more than 200 the voltage drop of volt, in circuit electric capacity and diode withstand voltage be three 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, and can not break down.
Above the better embodiment of this patent is explained in detail, but this patent is not limited to above-mentioned execution mode, in the ken that one skilled in the relevant art possesses, various change can also be made under the prerequisite not departing from this patent aim.
Claims (4)
1. a LED power circuit, is characterized in that, comprises the metal-oxide-semiconductor type surge restraint circuit be connected with alternating current source and the double-current drive circuit be connected with metal-oxide-semiconductor type surge circuit; Described metal-oxide-semiconductor type surge circuit comprises and is connected to the first dividing potential drop branch road between the live wire L of alternating current input power supplying and zero line N and the second dividing potential drop branch road, this the first dividing potential drop branch road comprises and is serially connected in resistance R1 and resistance R2 between the live wire of alternating current input power supplying and zero line, and this second dividing potential drop branch road comprises and is serially connected in resistance R3 and resistance R4 between the live wire of alternating current input power supplying and zero line; Resistance R1 is connected with the common port of resistance R4 with resistance R3 with the common port of resistance R2; Second dividing potential drop branch road also comprises the capacitive branch in parallel with resistance R1, resistance R3, and this capacitive branch comprises electric capacity C1 and the electric capacity C2 of serial connection, and the second dividing potential drop branch road connects a metal-oxide-semiconductor Q1; The grid contact resistance R1 of metal-oxide-semiconductor Q1 and the common port of resistance R2, source electrode connects the live wire of alternating current input power supplying; Described double-current drive circuit comprises: diode D1, diode D2 and electric capacity C3, C4, C5 and LED module; The input of diode D1 is connected with the output of diode D2, and its tie point is connected with the drain electrode of described metal-oxide-semiconductor; The first end of electric capacity C4 is connected with the output of diode D1, and the second end is connected with the first end of electric capacity C5, and the node that electric capacity C4 is connected with electric capacity C5 is connected with the zero line of alternating current input power supplying, and second end of electric capacity C5 is connected with the input of diode D2; Described LED module is made up of some light-emitting diodes, and one end of this LED module is connected with the output of described diode D1, and the other end is connected with the input of described diode D2.
2. a kind of LED power circuit according to claim 1, is characterized in that, described metal-oxide-semiconductor is P channel-type metal-oxide-semiconductor.
3. a kind of LED power circuit according to claim 1, is characterized in that, between the source electrode and drain electrode of described metal-oxide-semiconductor Q1, be provided with resistance R5, resistance R5 is also connected with described capacitive branch.
4. a kind of LED power circuit according to claim 1, is characterized in that, connects an electrochemical capacitor C3, this electrochemical capacitor C3 resistance R6 in parallel between the output and diode D2 input of described diode D1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420619737.7U CN204090254U (en) | 2014-10-24 | 2014-10-24 | A kind of LED power circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420619737.7U CN204090254U (en) | 2014-10-24 | 2014-10-24 | A kind of LED power circuit |
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| Publication Number | Publication Date |
|---|---|
| CN204090254U true CN204090254U (en) | 2015-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420619737.7U Expired - Fee Related CN204090254U (en) | 2014-10-24 | 2014-10-24 | A kind of LED power circuit |
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| Country | Link |
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| CN (1) | CN204090254U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US12501532B2 (en) | 2021-08-03 | 2025-12-16 | Signify Holding B.V. | Redundant lighting driver system |
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2014
- 2014-10-24 CN CN201420619737.7U patent/CN204090254U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US12501532B2 (en) | 2021-08-03 | 2025-12-16 | Signify Holding B.V. | Redundant lighting driver system |
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| 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: 20150107 Termination date: 20161024 |
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| CF01 | Termination of patent right due to non-payment of annual fee |