CN103313490A - Control circuit of three-way dimming LED (light-emitting diode) lights - Google Patents
Control circuit of three-way dimming LED (light-emitting diode) lights Download PDFInfo
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- CN103313490A CN103313490A CN2013102831062A CN201310283106A CN103313490A CN 103313490 A CN103313490 A CN 103313490A CN 2013102831062 A CN2013102831062 A CN 2013102831062A CN 201310283106 A CN201310283106 A CN 201310283106A CN 103313490 A CN103313490 A CN 103313490A
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Abstract
The invention relates to a control circuit of a three-way dimming LED lights. The control circuit of the three-way dimming LED lights is characterized by comprising a three-way option switch circuit, a rectifying circuit, two detection circuits, a constant-current control circuit and a group of LED lights, wherein alternating currents pass through the three-way option switch circuit to be connected with the rectifying circuit, the rectifying circuit is output to the constant-current control circuit after AC-DC (alternating current-direct current) conversion, the constant-current control circuit outputs to supply electricity to the LED lights, the output ends of the three-way option switch circuit are connected with the detection circuits, and the output ends of the detection circuits are connected with current control ends of a constant-current chip in the constant-current control circuit. According to the control circuit of the three-way dimming LED lights, the detection circuits are added to adjust the resistance value of a current control end of the constant-current chip U1, the working of the three-way dimming LED lights can be completed with only one main loop and a circuit of LED lights, the circuit is simplified and the costs are reduced. Besides, the control circuit of the three-way dimming LED lights can be widely applied to isolated power sources, non-isolated power sources and primary control constant-current circuits.
Description
Technical field
The present invention relates to a kind of LED lighting source technology, particularly a kind of three-stage dimming LED lamp control circuit.
Background technology
Existing three-stage dimming incandescent lamp structure is seen accompanying drawing 1, has used two segment filaments, low watt filament 1 and in watt filament 3,2, three input lines of a common segment utilize mechanical switch, different power-up sequence realizes different combinations, and reaches the function of 3 kinds of luminous fluxes, explains and sees accompanying drawing 2 winding diagrams.The LED lamp will substitute this kind incandescent lamp, and inside just need to reach this kind function with two power supplys, and circuit is complicated, and cost is high, takies the lamp body space larger, is unfavorable for assembling, is unfavorable for heat radiation.
Summary of the invention
The present invention be directed to existing three-stage dimming incandescent lamp control needs the two-way power supply, and the problem of circuit complexity proposes a kind of three-stage dimming LED lamp control circuit, simplifies circuit, reduces cost.
Technical scheme of the present invention is: a kind of three-stage dimming LED lamp control circuit, comprise three sections selected on-off circuits, No. one rectification circuit, two alignment detection circuits, one road constant-current control circuit and one group of LED lamp, alternating current connects rectification circuit through three sections selected on-off circuits, output to constant-current control circuit after the rectification circuit AC-DC conversion, constant-current control circuit is exported to the power supply of LED lamp, three sections selected on-off circuit output termination two-way testing circuits, testing circuit output connects constant current chip current controling end in the constant-current control circuit.
Described three sections selected on-off circuits output two-way alternating current, wherein two sections respectively wherein a road, three section of output two-way corresponding to conducting export two-way for connecting simultaneously.Described two alignment detection circuits connect respectively three sections selected on-off circuit two-way outputs, every alignment detection circuit comprises diode, sampling resistor, metal-oxide-semiconductor and feedback resistance, three sections diode and sampling resistor ground connection that selected on-off circuit output AC electricity is connected through corresponding testing circuit, the sampling resistor force feed metal-oxide-semiconductor control end that powers on, the metal-oxide-semiconductor conducting, feedback resistance access constant current chip current controling end.
Beneficial effect of the present invention is: three-stage dimming LED lamp control circuit of the present invention, and adopt to exchange and detect, the primary control mode realizes the three-stage dimming function with a cover main circuit, has simplified circuit, reduces element and forms, and reduces cost, reduces the power supply size.Can be widely used in insulating power supply and non-insulating power supply, in the primary control constant-current circuit.
Description of drawings
Fig. 1 is existing three-stage dimming incandescent lamp structural representation;
Fig. 2 is existing three-stage dimming incandescent lamp winding diagram;
Fig. 3 is existing three-stage dimming incandescent lamp the first luminous flux work schematic diagram;
Fig. 4 is existing three-stage dimming incandescent lamp the second luminous flux work schematic diagram;
Fig. 5 is existing three-stage dimming incandescent lamp the 3rd luminous flux work schematic diagram;
Fig. 6 is existing three-stage dimming LED lamp control circuit figure;
Fig. 7 is three-stage dimming LED lamp control circuit figure of the present invention.
Embodiment
Such as the traditional three-stage dimming incandescent lamp of Fig. 3-5 at three kinds of luminous flux schematic diagrames, Fig. 6 realizes the circuit diagram of control with the two-way power supply for existing three-stage dimming LED lamp, two-way constant-current control circuit control two paths of LED lamp, principle is the same with conventional incandescent, by the selected required luminous flux of switch, two segment filaments originally add the two paths of LED lamp with the two-way constant-current control circuit and replace.
The present invention adopts a cover main circuit job, at AC two signal deteching circuits are set, the two-way detection signal is controlled respectively corresponding operating circuit, elementary realization LED output current control at power supply, circuit can be applicable to the non-buffer circuit of step-down constant current, also can be applicable to anti-swash isolation constant-current circuit and the non-isolation constant-current circuit that boosts; The circuit constant current is controlled at primary side, has current sense resistor, detects resistance and feeds back to control IC in the voltage signal mode, realizes changing output current.
Circuit has 2 key points, and the first, exchange detection signal 2 the tunnel.The second, utilize the signal that detects to change the resistance of electric circuit inspection resistance.
Three-stage dimming LED lamp control circuit figure as shown in Figure 7, circuit front-end is selector switch, when L1 and N two ends plugged, the voltage of power end is through diode D1 and three resistance R 1 of series connection, R2, R3 dividing potential drop, the detectable voltage signals between R1 and R2 are transferred to the g utmost point of metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q1 conducting, R15 is switched to GND.Power supply is sent into main circuit through bridge heap BD1 simultaneously, and U1 starts working, and the current controling end CS pin of U1 is by resistance R 15 ground connection, and output current is determined by the R15 resistance.This LED lamp with
I
1=U
CS÷ R
CS1Constant current work, R
CS1Be R15 resistance in parallel with R17, this is first paragraph brightness.
When L2 and N two ends plugged, L1 and N disconnect, not conducting of metal-oxide-semiconductor Q1, the voltage of power end is through diode D2 and three resistance R 4 of series connection, R5, R6 dividing potential drop, detectable voltage signals between R4 and R5 is transferred to the g utmost point of metal-oxide-semiconductor Q2, metal-oxide-semiconductor Q2 conducting, and R16 is switched to GND.Power supply is sent into main circuit through bridge heap BD2 simultaneously, and U1 starts working, and the current controling end CS pin of U1 is by resistance R 16 ground connection, and output current is determined by the R16 resistance.This LED lamp is with I
2=U
CS÷ R
CS2Constant current work, R
CS2Be R16 resistance in parallel with R17, this is the brightness of LED lamp second segment.
As L1 and N, L2 and N two-way be plugged simultaneously, then as previously mentioned, R15, R16 is place in circuit simultaneously, and output current is I
3=U
CS÷ R
CS3, R
CS3Be R15, R16 resistance in parallel with R17, this is the 3rd section brightness of LED lamp.
By increasing testing circuit, adjust the current controling end resistance value of constant current chip U1 like this, only need a major loop, a paths of LEDs lamp just can be finished the work of 3 sections dimming LED lamps, has simplified circuit, has reduced cost.
Claims (3)
1. three-stage dimming LED lamp control circuit, it is characterized in that, comprise three sections selected on-off circuits, No. one rectification circuit, two alignment detection circuits, one road constant-current control circuit and one group of LED lamp, alternating current connects rectification circuit through three sections selected on-off circuits, output to constant-current control circuit after the rectification circuit AC-DC conversion, constant-current control circuit is exported to the power supply of LED lamp, three sections selected on-off circuit output termination two-way testing circuits, testing circuit output connects constant current chip current controling end in the constant-current control circuit.
2. described three-stage dimming LED lamp control circuit according to claim 1 is characterized in that, described three sections selected on-off circuits output two-way alternating current, wherein two sections respectively wherein a road, three section of output two-way corresponding to conducting export two-way for connecting simultaneously.
3. described three-stage dimming LED lamp control circuit according to claim 2, it is characterized in that, described two alignment detection circuits connect respectively three sections selected on-off circuit two-way outputs, every alignment detection circuit comprises diode, sampling resistor, metal-oxide-semiconductor and feedback resistance, three sections diode and sampling resistor ground connection that selected on-off circuit output AC electricity is connected through corresponding testing circuit, the sampling resistor force feed metal-oxide-semiconductor control end that powers on, metal-oxide-semiconductor conducting, feedback resistance access constant current chip current controling end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310283106.2A CN103313490B (en) | 2013-07-08 | 2013-07-08 | Control circuit of three-way dimming LED (light-emitting diode) lights |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310283106.2A CN103313490B (en) | 2013-07-08 | 2013-07-08 | Control circuit of three-way dimming LED (light-emitting diode) lights |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103313490A true CN103313490A (en) | 2013-09-18 |
| CN103313490B CN103313490B (en) | 2015-05-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310283106.2A Active CN103313490B (en) | 2013-07-08 | 2013-07-08 | Control circuit of three-way dimming LED (light-emitting diode) lights |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105429444A (en) * | 2015-11-20 | 2016-03-23 | 芜湖锐芯电子科技有限公司 | Alternating-current and direct-current automatic conversion circuit |
| CN106028500A (en) * | 2016-05-18 | 2016-10-12 | 厦门佰明光电股份有限公司 | Three-segment type LED lamp control circuit with adjustable output |
| CN106211449A (en) * | 2016-07-22 | 2016-12-07 | 上海顿格电子贸易有限公司 | A kind of circuit of LED of three-stage dimming |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120146550A1 (en) * | 2009-08-18 | 2012-06-14 | Sanken Electric Co., Ltd. | Led drive circuit |
| CN102695351A (en) * | 2012-05-21 | 2012-09-26 | 上海阿卡得电子有限公司 | Forming circuit of three-section dimming control signals of fluorescent lamp ballast |
-
2013
- 2013-07-08 CN CN201310283106.2A patent/CN103313490B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120146550A1 (en) * | 2009-08-18 | 2012-06-14 | Sanken Electric Co., Ltd. | Led drive circuit |
| CN102695351A (en) * | 2012-05-21 | 2012-09-26 | 上海阿卡得电子有限公司 | Forming circuit of three-section dimming control signals of fluorescent lamp ballast |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105429444A (en) * | 2015-11-20 | 2016-03-23 | 芜湖锐芯电子科技有限公司 | Alternating-current and direct-current automatic conversion circuit |
| CN106028500A (en) * | 2016-05-18 | 2016-10-12 | 厦门佰明光电股份有限公司 | Three-segment type LED lamp control circuit with adjustable output |
| CN106028500B (en) * | 2016-05-18 | 2018-05-18 | 厦门佰明光电股份有限公司 | A kind of adjustable three-stage LED light control circuit of output |
| CN106211449A (en) * | 2016-07-22 | 2016-12-07 | 上海顿格电子贸易有限公司 | A kind of circuit of LED of three-stage dimming |
| CN106211449B (en) * | 2016-07-22 | 2018-06-29 | 上海顿格电子贸易有限公司 | A kind of circuit of LED of three-stage dimming |
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| Publication number | Publication date |
|---|---|
| CN103313490B (en) | 2015-05-06 |
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Address after: Room 1534, No. 498 GuoShoujing Road, Pudong Software Park, Pudong New Area, Shanghai, 201203 Patentee after: Kotya lighting (Shanghai) Co.,Ltd. Address before: 201203 Shanghai city Pudong New Area GuoShouJing No. 498 Pudong Software Park Building 1, room 1534 Patentee before: Shanghai Dunge Electronic Trading Co.,Ltd. |
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Effective date of registration: 20220309 Address after: 518000 605 bixinyuan, Futian District, Shenzhen, Guangdong Patentee after: Wu Guangmin Address before: Room 1534, building 1, Pudong Software Park, 498 GuoShouJing Road, China (Shanghai) pilot Free Trade Zone, Pudong New Area, Shanghai, 201203 Patentee before: Kotya lighting (Shanghai) Co.,Ltd. |
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