CN203206552U - LED circuit for silicon controlled rectifier dimmer - Google Patents
LED circuit for silicon controlled rectifier dimmer Download PDFInfo
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- CN203206552U CN203206552U CN 201320204578 CN201320204578U CN203206552U CN 203206552 U CN203206552 U CN 203206552U CN 201320204578 CN201320204578 CN 201320204578 CN 201320204578 U CN201320204578 U CN 201320204578U CN 203206552 U CN203206552 U CN 203206552U
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- npn triode
- negative pole
- module
- rectification module
- led lamp
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Abstract
The utility model relates to an electronic circuit, especially to an LED power circuit. The LED circuit provided by the utility model comprises a rectifier module, a filtering module, and an over-current protection module, which are sequentially connected together. An input terminal of the rectifier module is connected with AC commercial power supply. An LED lamp group in series with the over-current protection module is connected with an output terminal of the rectifier module. The filtering module is in parallel connection with the LED lamp group. The LED circuit of the utility model is a dedicated power circuit for a matched LED lamp, which is suitable for adjusting the LED lamp by utilizing a silicon controlled rectifier dimmer. The utility model is characterized by a capability of increasing power factors and improving efficiency of a light fixture, and a function of over-current protection.
Description
Technical field
The utility model relates to electronic circuit, relates in particular to the LED power circuit, especially for the led circuit of controllable silicon dimmer.
Background technology
The major part that existing controllable silicon dimmer adopts is incandescent lamp.And the most of product of LED lamp can not be used for controllable silicon dimmer, therefore adopts the present main problem of LED lamp to have two kinds: 1, can't light modulation; 2, serious stroboscopic.Therefore, need a kind of led circuit that can be suitable for controllable silicon dimmer to realize LED lamp tunable optical.
The utility model content
Therefore, the utility model proposes a kind of led circuit for controllable silicon dimmer, this led circuit can improve the power factor (PF) of light fixture and improve the efficient of light fixture, and has overcurrent protection function.
The utility model adopts following technical scheme:
The led circuit that is used for controllable silicon dimmer; this led circuit comprises a rectification module that connects successively; one filtration module and an overcurrent protection module; the input of described rectification module is connected to the AC civil power; be connected to the output of rectification module after LED lamp group and the series connection of described overcurrent protection module, described filtration module is in parallel with LED lamp group.
Wherein, described rectification module is to be made of a full wave rectifier bridge stack DB1.Perhaps forming the full-wave rectification unit by 4 diode elements substitutes.Or adopt 2 diode elements to form the halfwave rectifier unit.
Wherein, described filtration module comprises: an inductance L 1, a resistance R 5, a capacitor C 1 and a high-frequency diode D1, the output cathode of rectification module is connected in series this inductance L 1 carry out the steady ripple of inductance after, be serially connected with again above-mentioned LED lamp group, serial connection one reverse high-frequency diode D1 formed a High frequency filter unit after resistance R 5 and capacitor C 1 composed in parallel a RC filter unit, and this High frequency filter unit is in parallel with LED lamp group.
Wherein, described overcurrent protection module comprises: NPN triode Q1; Q2; resistance R 1-R4; capacitor C 2; diode D2; D3; computing comparator M1; reference voltage source RV1; optocoupler U1; resistance R 1 one is terminated at the negative pole of above-mentioned LED lamp group; the other end is connected to the collector electrode of NPN triode Q1; resistance R 2 one is terminated at the negative pole of above-mentioned LED lamp group; the other end is connected to the base stage of NPN triode Q1; the emitter of NPN triode Q1 is connected to the normal phase input end of computing comparator M1 and an end of resistance R 4 and capacitor C 2; the other end of one end of resistance R 4 and capacitor C 2 connects the output negative pole of above-mentioned rectification module; connect the output negative pole of rectification module behind the negative-phase input series connection reference voltage source RV1 of computing comparator M1; the power cathode of computing comparator M1 connects the output negative pole of rectification module; the positive source of computing comparator M1 connects the collector electrode of NPN triode Q2; the base stage of the output termination NPN triode Q2 of computing comparator M1; the emitter of NPN triode Q2 connects the output negative pole of rectification module; the collector electrode of collector electrode forward series diode D2 to the NPN triode Q2 of NPN triode Q1; the reverse series diode D3 of the collector electrode of NPN triode Q2 is to the output negative pole of rectification module; the base series resistor R3 of NPN triode Q1 is anodal to the input of optocoupler U1; the input negative pole of optocoupler U1 connects the collector electrode of NPN triode Q2; the base stage of NPN triode Q1 also is connected in the output cathode of optocoupler U1, and the output negative pole of optocoupler U1 is connected to the output negative pole of rectification module.
Led circuit of the present utility model is a kind of LED light fixture power circuit special that controllable silicon dimmer is regulated the coupling of LED lamp that is suitable for, and can improve the power factor (PF) of light fixture and the efficient of raising light fixture, and have overcurrent protection function.
Description of drawings
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment
Now with embodiment the utility model is further specified by reference to the accompanying drawings.
Consult Fig. 1 described; be connected in a controllable silicon dimmer before the input of the LED power circuit of this embodiment; this circuit comprises a rectification module that connects successively; one filtration module and an overcurrent protection module; the input of described rectification module is connected to the AC civil power; be connected to the output of rectification module after LED lamp group and the series connection of described overcurrent protection module, described filtration module is in parallel with LED lamp group.Realize describing below in conjunction with the physical circuit of embodiment:
This rectification module is to be made of a full wave rectifier bridge stack DB1, comes AC is carried out full-wave rectification.The full wave rectifier bridge stack DB1 of this rectification module also can adopt 4 diode elements to form the full-wave rectification unit and substitute, and perhaps also can adopt 2 diode elements to form the halfwave rectifier unit.
This filtration module comprises: an inductance L 1, one resistance R 5, one capacitor C 1 and a high-frequency diode D1, carry out steady ripple and the clutter in loop is absorbed filtering, the output cathode of full wave rectifier bridge stack DB1 is connected in series this inductance L 1 carry out the steady ripple of inductance after, be serially connected with again LED 1, the series lamp group of LED70, serial connection one reverse high-frequency diode D1 formed a High frequency filter unit, this High frequency filter unit and LED 1 after resistance R 5 and capacitor C 1 composed in parallel a RC filter unit, the series lamp group parallel connection of LED70 is carried out the high frequency clutter and is absorbed filtering.
This overcurrent protection module comprises: NPN triode Q1; Q2; resistance R 1-R4; capacitor C 2; diode D2; D3; computing comparator M1; reference voltage source RV1; optocoupler U1; resistance R 1 one is terminated at above-mentioned diode (LED) 1; the negative pole of the series lamp group of LED70; the other end is connected to the collector electrode of NPN triode Q1; resistance R 2 one is terminated at above-mentioned diode (LED) 1; the negative pole of the series lamp group of LED70; the other end is connected to the base stage of NPN triode Q1; the emitter of NPN triode Q1 is connected to the normal phase input end of computing comparator M1 and an end of resistance R 4 and capacitor C 2; the other end of one end of resistance R 4 and capacitor C 2 connects the output negative pole of above-mentioned full wave rectifier bridge stack DB1; connect the output negative pole of full wave rectifier bridge stack DB1 behind the negative-phase input series connection reference voltage source RV1 of computing comparator M1; the power cathode of computing comparator M1 connects the output negative pole of full wave rectifier bridge stack DB1; the positive source of computing comparator M1 connects the collector electrode of NPN triode Q2; the base stage of the output termination NPN triode Q2 of computing comparator M1; the emitter of NPN triode Q2 connects the output negative pole of full wave rectifier bridge stack DB1; the collector electrode of collector electrode forward series diode D2 to the NPN triode Q2 of NPN triode Q1; the reverse series diode D3 of the collector electrode of NPN triode Q2 is to the output negative pole of full wave rectifier bridge stack DB1; the base series resistor R3 of NPN triode Q1 is anodal to the input of optocoupler U1; the input negative pole of optocoupler U1 connects the collector electrode of NPN triode Q2; the base stage of NPN triode Q1 also is connected in the output cathode of optocoupler U1, and the output negative pole of optocoupler U1 is connected to the output negative pole of full wave rectifier bridge stack DB1.After this overcurrent protection module comes reference voltage (being 2.5V in the example) with reference voltage source RV1 to compare by computing comparator M1 and negative feedback return NPN triode Q1 and carry out overcurrent protection and regulate, optocoupler U1 is the isolating switch that feeds back open and close.
Although specifically show and introduced the utility model in conjunction with preferred embodiment; but the those skilled in the art should be understood that; within not breaking away from the spirit and scope of the present utility model that appended claims limits; can make a variety of changes the utility model in the form and details, be protection range of the present utility model.
Claims (6)
1. the led circuit that is used for controllable silicon dimmer; it is characterized in that: this led circuit comprises a rectification module that connects successively; one filtration module and an overcurrent protection module; the input of described rectification module is connected to the AC civil power; be connected to the output of rectification module after LED lamp group and the series connection of described overcurrent protection module, described filtration module is in parallel with LED lamp group.
2. the led circuit for controllable silicon dimmer according to claim 1, it is characterized in that: described rectification module is to be made of a full wave rectifier bridge stack DB1.
3. the led circuit for controllable silicon dimmer according to claim 2 is characterized in that: described full wave rectifier bridge stack DB1 forms the full-wave rectification unit by 4 diode elements and substitutes.
4. the led circuit for controllable silicon dimmer according to claim 1 is characterized in that: described rectification module is to adopt 2 diode elements to form the halfwave rectifier unit.
5. the led circuit for controllable silicon dimmer according to claim 1, it is characterized in that: described filtration module comprises: an inductance L 1, a resistance R 5, a capacitor C 1 and a high-frequency diode D1, the output cathode of rectification module is connected in series this inductance L 1 carry out the steady ripple of inductance after, be serially connected with again above-mentioned LED lamp group, serial connection one reverse high-frequency diode D1 formed a High frequency filter unit after resistance R 5 and capacitor C 1 composed in parallel a RC filter unit, and this High frequency filter unit is in parallel with LED lamp group.
6. the led circuit for controllable silicon dimmer according to claim 1; it is characterized in that: described overcurrent protection module comprises: NPN triode Q1; Q2; resistance R 1-R4; capacitor C 2; diode D2; D3; computing comparator M1; reference voltage source RV1; optocoupler U1; resistance R 1 one is terminated at the negative pole of above-mentioned LED lamp group; the other end is connected to the collector electrode of NPN triode Q1; resistance R 2 one is terminated at the negative pole of above-mentioned LED lamp group; the other end is connected to the base stage of NPN triode Q1; the emitter of NPN triode Q1 is connected to the normal phase input end of computing comparator M1 and an end of resistance R 4 and capacitor C 2; the other end of one end of resistance R 4 and capacitor C 2 connects the output negative pole of above-mentioned rectification module; connect the output negative pole of rectification module behind the negative-phase input series connection reference voltage source RV1 of computing comparator M1; the power cathode of computing comparator M1 connects the output negative pole of rectification module; the positive source of computing comparator M1 connects the collector electrode of NPN triode Q2; the base stage of the output termination NPN triode Q2 of computing comparator M1; the emitter of NPN triode Q2 connects the output negative pole of rectification module; the collector electrode of collector electrode forward series diode D2 to the NPN triode Q2 of NPN triode Q1; the reverse series diode D3 of the collector electrode of NPN triode Q2 is to the output negative pole of rectification module; the base series resistor R3 of NPN triode Q1 is anodal to the input of optocoupler U1; the input negative pole of optocoupler U1 connects the collector electrode of NPN triode Q2; the base stage of NPN triode Q1 also is connected in the output cathode of optocoupler U1, and the output negative pole of optocoupler U1 is connected to the output negative pole of rectification module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320204578 CN203206552U (en) | 2013-04-22 | 2013-04-22 | LED circuit for silicon controlled rectifier dimmer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320204578 CN203206552U (en) | 2013-04-22 | 2013-04-22 | LED circuit for silicon controlled rectifier dimmer |
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| Publication Number | Publication Date |
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| CN203206552U true CN203206552U (en) | 2013-09-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201320204578 Expired - Fee Related CN203206552U (en) | 2013-04-22 | 2013-04-22 | LED circuit for silicon controlled rectifier dimmer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106507546A (en) * | 2016-12-26 | 2017-03-15 | 吉安伊戈尔电气有限公司 | A kind of high reliability surge protection circuit |
-
2013
- 2013-04-22 CN CN 201320204578 patent/CN203206552U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106507546A (en) * | 2016-12-26 | 2017-03-15 | 吉安伊戈尔电气有限公司 | A kind of high reliability surge protection circuit |
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| Date | Code | Title | Description |
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| 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: 20130918 Termination date: 20140422 |