CN202435669U - LED power supply circuit adaptable to bidirectional thyristor dimming - Google Patents
LED power supply circuit adaptable to bidirectional thyristor dimming Download PDFInfo
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- CN202435669U CN202435669U CN2011205624501U CN201120562450U CN202435669U CN 202435669 U CN202435669 U CN 202435669U CN 2011205624501 U CN2011205624501 U CN 2011205624501U CN 201120562450 U CN201120562450 U CN 201120562450U CN 202435669 U CN202435669 U CN 202435669U
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Abstract
The utility model provides an LED power supply circuit adaptable to bidirectional thyristor dimming. The LED power supply circuit is characterized by comprising a power supply input and rectifier circuit, a triggering oscillation and half-bridge conversion circuit, a power-factor correction circuit and an output circuit, wherein the power supply input and rectifier circuit which serves as the input of the power supply circuit is connected with the mains supply; the power supply input and rectifier circuit outputs a direct-current electric signal to the input of the triggering oscillation and half-bridge conversion circuit after rectifying and filtering an alternative current power supply; and after the output of the triggering oscillation and half-bridge conversion circuit is subjected to follow current of the power-factor correction circuit, an LED lamp is supplied with power by the output circuit. The LED power supply circuit is an LED dimmable circuit composed of discrete components and has the advantages of simple structure, low production cost and high economic benefit.
Description
Technical field
The utility model relates to light fixture, especially a kind of design that adapts to the LED power circuit of controllable silicon light modulation.
Background technology
Social in modern times, energy problem has become pendulum and in face of everybody, has been badly in need of one of subject matter that solves.The LED product also begins to enter into lighting field; LED (the Light-Emitting-Diode Chinese meaning is light-emitting diode) is a kind of semiconductor that can electric energy be converted into luminous energy; It has changed the luminous and luminous principle of electricity-saving lamp tricolor powder of incandescent lamp tungsten filament, and adopts electroluminescence.According to one's analysis, the characteristics of LED are very obvious, and the life-span is long, light efficiency is high, radiationless and low-power consumption.The spectrum of LED almost all concentrates on visible light frequency band, and its luminous efficiency can surpass 150lm/W (2010).LED and ordinary incandescent lamp, spiral energy-saving lamp and T5 three-color fluorescent lamp are compared, and the result shows: the light efficiency of ordinary incandescent lamp is 12lm/W, and the life-span was less than 2000 hours; The light efficiency of spiral energy-saving lamp is 60lm/W; Life-span, the T5 fluorescent lamp then was 96lm/W less than 8000 hours, and the life-span is approximately 10000 hours; Can surpass 150lm/W in theory and diameter is 5 millimeters a white light LEDs light efficiency, the life-span can be greater than 100000 hours.Someone predicts that also following LED life-span upper limit is with infinity.
But the LED power supply circuits that can adapt to controllable silicon light modulation at present still are a difficult problem, have only the IC chip of only a few can reach requirement, but complicated circuit, the cost that chip uses is high.The present invention is based on a kind of LED tunable optical circuit that is made up of discrete device of developing under this problem.
Summary of the invention
The purpose of the utility model is to be difficult to realize to the existing LED power supply circuits that can adapt to controllable silicon light modulation; Have only the IC chip of only a few can reach requirement; But complicated circuit, the high problem of cost that chip uses proposes a kind of LED power circuit that adapts to the bidirectional triode thyristor light modulation.
The technical scheme of the utility model is:
A kind of LED power circuit that adapts to the bidirectional triode thyristor light modulation; It comprises power supply input and rectification circuit, triggering vibration and half-bridge change-over circuit, circuit of power factor correction and output circuit; Described power supply input and rectification circuit connect mains supply as the input of power circuit; The output DC signal was to the input that triggers vibration and half-bridge change-over circuit after power supply input and rectification circuit carried out rectifying and wave-filtering to AC power; The output that triggers vibration and half-bridge change-over circuit is output as the power supply of LED lamp through after the circuit of power factor correction afterflow by output circuit.
The power supply input of the utility model and the input of rectification circuit connect mains supply, and it comprises bridge rectifier D 1-4 and LC oscillating circuit.
The triggering vibration and the half-bridge change-over circuit of the utility model comprise resistance R 1-R6, diode D5, D7, D8, capacitor C 4-C5, bidirectional trigger diode D6, triode Q1-Q2 and transformer T1.
The circuit of power factor correction of the utility model is used for the circuit afterflow and cooperates controllable silicon light modulation, and it comprises the feedback winding of sustained diode 9, rectifier diode D10, filter capacitor C8 and transformer T2.
The output circuit of the utility model comprises transformer T2, voltage stabilizing didoe D11-D12, capacitor C 6, C7, C9 and filter capacitor C10.
The beneficial effect of the utility model:
The utility model is a kind of LED tunable optical circuit that is made up of discrete device, has advantage simple in structure, that production cost is low and economic benefit is high.
Description of drawings
Fig. 1 is the theory diagram of the utility model.
Fig. 2 is the circuit diagram of the utility model.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is further described.
As shown in Figure 1; A kind of LED power circuit that adapts to the bidirectional triode thyristor light modulation; It comprises power supply input and rectification circuit, triggering vibration and half-bridge change-over circuit, circuit of power factor correction and output circuit; Described power supply input and rectification circuit connect mains supply as the input of power circuit; The output DC signal was to the input that triggers vibration and half-bridge change-over circuit after power supply input and rectification circuit carried out rectifying and wave-filtering to AC power, and the output that triggers vibration and half-bridge change-over circuit is output as the power supply of LED lamp through after the circuit of power factor correction afterflow by output circuit.
The circuit of power factor correction of the utility model is used for the circuit afterflow and cooperates controllable silicon light modulation, and it comprises the feedback winding of sustained diode 9, rectifier diode D10, filter capacitor C8 and transformer T2.
The utility model is a kind of LED tunable optical circuit that is made up of discrete device, has advantage simple in structure, that production cost is low and economic benefit is high.
The utility model does not relate to all identical with the prior art prior art that maybe can adopt of part to be realized.
Claims (5)
1. LED power circuit that can adapt to the bidirectional triode thyristor light modulation; It is characterized in that it comprises power supply input and rectification circuit, triggering vibration and half-bridge change-over circuit, circuit of power factor correction and output circuit; Described power supply input and rectification circuit connect mains supply as the input of power circuit; The output DC signal was to the input that triggers vibration and half-bridge change-over circuit after power supply input and rectification circuit carried out rectifying and wave-filtering to AC power; The output that triggers vibration and half-bridge change-over circuit is output as the power supply of LED lamp through after the circuit of power factor correction afterflow by output circuit.
2. the LED power circuit that adapts to the bidirectional triode thyristor light modulation according to claim 1 is characterized in that the input of described power supply input and rectification circuit connects mains supply, and it comprises bridge rectifier D 1-4 and LC oscillating circuit.
3. the LED power circuit that adapts to the bidirectional triode thyristor light modulation according to claim 1; It is characterized in that described triggering vibration and half-bridge change-over circuit comprise resistance R 1-R6, diode D5, D7, D8, capacitor C 4-C5, bidirectional trigger diode D6, triode Q1-Q2 and transformer T1.
4. the LED power circuit that adapts to the bidirectional triode thyristor light modulation according to claim 1; It is characterized in that described circuit of power factor correction is used for the circuit afterflow and cooperates controllable silicon light modulation, it comprises the feedback winding of sustained diode 9, rectifier diode D10, filter capacitor C8 and transformer T2.
5. the LED power circuit that adapts to the bidirectional triode thyristor light modulation according to claim 1 is characterized in that described output circuit comprises transformer T2, voltage stabilizing didoe D11-D12, capacitor C 6, C7, C9 and filter capacitor C10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205624501U CN202435669U (en) | 2011-12-29 | 2011-12-29 | LED power supply circuit adaptable to bidirectional thyristor dimming |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205624501U CN202435669U (en) | 2011-12-29 | 2011-12-29 | LED power supply circuit adaptable to bidirectional thyristor dimming |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202435669U true CN202435669U (en) | 2012-09-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205624501U Expired - Fee Related CN202435669U (en) | 2011-12-29 | 2011-12-29 | LED power supply circuit adaptable to bidirectional thyristor dimming |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202435669U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103298204A (en) * | 2013-04-22 | 2013-09-11 | 厦门通士达照明有限公司 | Silicon controlled dimming LED lamp driver with open circuit protection function |
-
2011
- 2011-12-29 CN CN2011205624501U patent/CN202435669U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103298204A (en) * | 2013-04-22 | 2013-09-11 | 厦门通士达照明有限公司 | Silicon controlled dimming LED lamp driver with open circuit protection function |
| CN103298204B (en) * | 2013-04-22 | 2015-08-12 | 厦门通士达照明有限公司 | With the controllable silicon light modulation LED lamp driver of open-circuit-protection |
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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: 20120912 Termination date: 20171229 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |