CN202059634U - Novel power supply for LED fluorescent lamp - Google Patents
Novel power supply for LED fluorescent lamp Download PDFInfo
- Publication number
- CN202059634U CN202059634U CN2011201372130U CN201120137213U CN202059634U CN 202059634 U CN202059634 U CN 202059634U CN 2011201372130 U CN2011201372130 U CN 2011201372130U CN 201120137213 U CN201120137213 U CN 201120137213U CN 202059634 U CN202059634 U CN 202059634U
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- China
- Prior art keywords
- power supply
- circuit
- fluorescent lamp
- led fluorescent
- light
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Abstract
The utility model discloses a power supply for an LED fluorescent lamp. The power supply comprises a rectification circuit, which is used for converting the accessed AC mains into DC mains; a filter circuit, which is used for filtering and smoothening; a reference regulating circuit, which is used for supplying a reference voltage 2.5V; a constant current source circuit, which comprises a large-power triode and a resistor in series connected with the emitter of the large-power triode; and a plurality of light emitting diodes, the anode of the first one of which is directly connected with the anode of the output of the rectification circuit, and the cathode of the last one of which is connected with the collector of the large-power triode. The power supply for an LED fluorescent lamp has the following benefits: the control circuit can have only eight elements and can be directly welded on an LED lamp plate by means of SMT (Surface Mount Technology). Meanwhile, the application of such circuit can ensure that the efficiency of the power supply is above 90%, and the heat radiated from the power supply is also decreased.
Description
Technical field
The utility model relates to a kind of daylight lamp power source, more specifically says, it relates to a kind of Novel LED fluorescent lamp power supply.
Background technology
The LED daylight lamp power source all is to adopt built-inly at present basically, and the so-called built-in power supply that just is meant can be placed on the fluorescent tube the inside, power supply itself as one independently control device be installed in fluorescent tube inside.And the inconvenience of the power supply of external because of installing and replacing is not accepted by market basically.What at present built-in LED power supply adopted all is the structure of Switching Power Supply, this structures shape the power supply more complicated, component number is many, can only as one independently control device be installed in fluorescent tube inside, so just make the heat radiation aluminum pipe of LED fluorescent tube can not make the form of fin, and can only be common semicircle column type.Do making the heat radiation of LED can not get good treatment like this, heat dissipation problem directly has influence on the light decay of LED, makes reduce useful life.
Summary of the invention
The purpose of this utility model is to overcome deficiency of the prior art, provides a kind of control power supply of the LED of making fluorescent lamp to oversimplify, and makes the LED daylight lamp power source that power supply and LED lamp plate can lump together.
This Novel LED fluorescent lamp power supply comprises: rectification circuit, described rectification circuit play and will insert the effect that civil power exchanges changes direct current; And filter circuit, described filter circuit plays filtering and smoothing effect; And reference voltage-stabilizing circuit, described reference voltage-stabilizing circuit plays the effect that the 2.5V reference voltage is provided; And constant-current source circuit, described constant-current source circuit comprises a large power triode, and the resistance of connecting with described large power triode emitter; Some light-emitting diodes, the positive pole of rectification circuit output is directly connected to the positive pole of first light-emitting diode, and the negative pole of last light-emitting diode connects the collector electrode of large power triode.
As preferably: described rectification circuit is a bridge heap, and inside is packaged with 4 diodes that are used for rectification.
As preferably: described filter circuit is the electric capacity that is connected in parallel on rectification circuit output end.
As preferably: described reference voltage-stabilizing circuit comprises the resistance that matches of a voltage stabilizing didoe and series connection, is connected to the positive pole of third from the bottom light-emitting diode again, and the reference utmost point of voltage stabilizing didoe is connected to the base stage of large power triode in the constant-current source circuit.
As preferably: described light-emitting diode is 80 altogether.
As preferably: before rectification circuit, also be provided with the fuse that the 220V alternating current function is isolated in protection.
The beneficial effects of the utility model are: the control power supply of LED fluorescent lamp is oversimplified, made power supply and LED lamp plate to lump together, the LED fluorescent tube just can be made the form of fin so, can effectively increase the area of dissipation of LED fluorescent tube.It is main constant-current source that the utility model power supply adopts a kind of single-transistor, utilizes the pressure reduction of LED itself to realize effective constant current control, and this control circuit can accomplish to have only 8 components and parts, and adopts the mode of paster welding directly to be welded on the LED lamp plate.Adopt simultaneously sort circuit can so that the efficient of power supply more than 90%, the heat that power supply is distributed also reduces.
Description of drawings
Fig. 1 is the utility model circuit theory diagrams;
Embodiment
Below in conjunction with drawings and Examples the utility model is described further.Though the utility model will be described in conjunction with preferred embodiment, should know, do not represent that the utility model is limited among the described embodiment.On the contrary, the utility model will be contained alternative, modified model and the equivalent in the scope of the present utility model that can be included in attached claims qualification.
Referring to shown in Figure 1, F1 is the paster fuse, opens protection and isolates the effect that 220V exchanges; BA1 is the bridge heap, and its inside has encapsulated 4 diodes, plays the effect of changeing direct current that exchanges; CA1 makes the signal smoothing of output for the 10uF/400V aluminium electroloysis; CA2 plays the effect of filtering for 10uF/100V electric capacity; RA1 is that 10K resistance and D5 are voltage stabilizing didoe, specifically can select for use TL43 1 to constitute the reference voltage-stabilizing circuit of a 2.5V; QA2 is that a large power triode and RA2 are that 36 Europe resistance constitute constant-current source circuit.
D1 to D80 for altogether 80 be encapsulated as 3528 light-emitting diode, 80 light-emitting diodes adopt the connected modes of series connection, are the loads that LED daylight lamp power source control device will connect.The positive pole of exporting after the rectification of circuit jackshaft heap is directly connected to the positive pole of first light-emitting diode, the negative pole of last light-emitting diode connects the collector electrode of large power triode, the positive pole of third from the bottom light-emitting diode and RA1, D5, CA2 forms the voltage stabilizing circuit that the supply constant-current source is used, the pressure reduction of 3V nearly when utilizing the light-emitting diode conducting, the light-emitting diode of three series connection can provide the energy storage effect of pressure reduction and the CA2 electric capacity of 9 V, makes the reference voltage that 2.5V is provided that TL431 can be stable.
The load request that uses this power requirement to connect is 80 light-emitting diodes, and can only be applied in 220V and exchange the input occasion, because the conducting pressure reduction of 80 light-emitting diodes is about 240V, it is about 280V through the direct voltage after the rectification that 220V exchanges input, and nearly the pressure reduction of 40V could make constant-current source work normally between the two.
It is aluminium base that the utility model requires pcb board, power supply is placed on aluminium base foremost, if be contained in the fluorescent tube of T8, the width of plank is made 16.5mm, the shared length of power panel is 45mm, can be covered the position of 25mm after fluorescent lamp is loaded onto lamp holder by lamp holder, adds the product label of a 20mm length again, then the shared position of power supply is just covered fully, does not affect the appearance.
For satisfying the requirement of dielectric strength, require the connected mode of the fixedly employing bond plies band of aluminium base on the fluorescent tube aluminum hull.Use LED fluorescent lamp of the present utility model, under room temperature 20 degree environment, the maximum temperature of fluorescent lamp shell is no more than 43 degree after tested, and the pin temperature of light-emitting diode is no more than 50 degree, and through 1000 hours the test of lighting, light decay was below 2%.
Claims (6)
1. Novel LED fluorescent lamp power supply is characterized in that: comprising: rectification circuit, described rectification circuit play and will insert the effect that civil power exchanges changes direct current; And filter circuit, described filter circuit plays filtering and smoothing effect; And reference voltage-stabilizing circuit, described reference voltage-stabilizing circuit plays the effect that the 2.5V reference voltage is provided; And constant-current source circuit, described constant-current source circuit comprises a large power triode, and the resistance of connecting with described large power triode emitter; Some light-emitting diodes, the positive pole of rectification circuit output is directly connected to the positive pole of first light-emitting diode, and the negative pole of last light-emitting diode connects the collector electrode of large power triode.
2. Novel LED fluorescent lamp power supply according to claim 1 is characterized in that: described rectification circuit is a bridge heap, and inside is packaged with 4 diodes that are used for rectification.
3. Novel LED fluorescent lamp power supply according to claim 1 is characterized in that: described filter circuit is the electric capacity that is connected in parallel on rectification circuit output end.
4. Novel LED fluorescent lamp power supply according to claim 1, it is characterized in that: described reference voltage-stabilizing circuit comprises the resistance that matches of a voltage stabilizing didoe and series connection, be connected to the positive pole of third from the bottom light-emitting diode again, the reference utmost point of voltage stabilizing didoe is connected to the base stage of large power triode in the constant-current source circuit.
5. Novel LED fluorescent lamp power supply according to claim 1 is characterized in that: described light-emitting diode is 80 altogether.
6. Novel LED fluorescent lamp power supply according to claim 1 is characterized in that: also be provided with the fuse that the 220V alternating current function is isolated in protection before rectification circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201372130U CN202059634U (en) | 2011-04-27 | 2011-04-27 | Novel power supply for LED fluorescent lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201372130U CN202059634U (en) | 2011-04-27 | 2011-04-27 | Novel power supply for LED fluorescent lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202059634U true CN202059634U (en) | 2011-11-30 |
Family
ID=45019596
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201372130U Expired - Fee Related CN202059634U (en) | 2011-04-27 | 2011-04-27 | Novel power supply for LED fluorescent lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202059634U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104822204A (en) * | 2015-05-05 | 2015-08-05 | 成都瑞昌仪器制造有限公司 | LED insect-trapping device with adjustable spectrum |
| CN112000165A (en) * | 2020-04-24 | 2020-11-27 | 昆山启康医疗器械有限公司 | Graded adjustable constant current source with high-voltage output capability |
-
2011
- 2011-04-27 CN CN2011201372130U patent/CN202059634U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104822204A (en) * | 2015-05-05 | 2015-08-05 | 成都瑞昌仪器制造有限公司 | LED insect-trapping device with adjustable spectrum |
| CN112000165A (en) * | 2020-04-24 | 2020-11-27 | 昆山启康医疗器械有限公司 | Graded adjustable constant current source with high-voltage output capability |
| CN112000165B (en) * | 2020-04-24 | 2022-03-08 | 昆山启康医疗器械有限公司 | Graded adjustable constant current source with high-voltage output capability |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111130 Termination date: 20140427 |