CN202005046U - LED (light-emitting diode) lamp and power supply driving circuit of LED lamp - Google Patents
LED (light-emitting diode) lamp and power supply driving circuit of LED lamp Download PDFInfo
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- CN202005046U CN202005046U CN 201120127970 CN201120127970U CN202005046U CN 202005046 U CN202005046 U CN 202005046U CN 201120127970 CN201120127970 CN 201120127970 CN 201120127970 U CN201120127970 U CN 201120127970U CN 202005046 U CN202005046 U CN 202005046U
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Abstract
The utility model belongs to the lighting field and provides an LED (light-emitting diode) lamp and a power supply driving circuit of the LED lamp; the power supply driving circuit of the LED lamp comprises a rectifier bridge, a driving unit and a short circuit protective unit sequentially connected between a power supply and an LED load, the short circuit protective unit comprises a resistor R7, a resistor R9, a resistor R10, a resistor R20, a resistor R21, a capacitor C12, a thyristor D12, a diode D15, a diode D16, a voltage-regulator diode ZD1, a photoelectric coupler U2 and a switch element, when the LED load is in short circuit, the light-emitting diode of the photoelectric coupler U2 can be lighted instantaneously, a phototriode of the photoelectric coupler U2 generates current to conduct the thyristor D12, the electrical level of the control end of the switch element is increased, the switch element is conducted, the electrical level of the enabling end of the control chip of the driving unit is lowered, the control chip stops working, so as to realize the short-circuit protective function. In the utility model, the short-circuit protective circuit is realized by separating the elements, the structure is simple and the cost is low.
Description
Technical field
The utility model belongs to lighting field, relates in particular to a kind of LED light fixture and power driving circuit thereof.
Background technology
LED is as a kind of new light source, be widely used in the middle of the daily life, each major company and research institution are in the ascendant to the research of LED power driving circuit in recent years, different with the electric ballast of fluorescent lamp, the major function of LED power driving circuit is that alternating voltage is converted to direct voltage, and finishes the coupling with the voltage and current of LED simultaneously.
At present; when the output of LED power driving circuit is big electric current or high-tension situation; if load short circuits or people are the misoperation short circuit, may cause the circuit damage so even cause fire, so the output of LED power driving circuit need increase the function of short-circuit protection.
Existing short-circuit protection circuit generally adopts integrated circuit to realize, but has circuit structure complexity, problem that cost is high.
The utility model content
The purpose of this utility model is to provide a kind of LED lamp power drive circuit, and the short-circuit protection circuit that is intended to solve present LED lamp power drive circuit exists complex structure, problem that cost is high.
The utility model is to realize like this; a kind of LED lamp power drive circuit; described LED lamp power drive circuit comprises rectifier bridge, driver element and the short-circuit protection unit that is connected in turn between power supply and the LED load, it is characterized in that, described short-circuit protection unit comprises:
Resistance R 7, resistance R 9, resistance R 10, resistance R 20, resistance R 21, capacitor C 12, thyristor D12, diode D15, diode D16, voltage stabilizing didoe ZD1, photoelectrical coupler U2 and switch element;
The negative electrode of described diode D16 connects the positive pole of LED load, the anode of described diode D16 connects the anode of voltage stabilizing didoe ZD1, the negative electrode of described voltage stabilizing didoe ZD1 connects the negative electrode of the light-emitting diode of photoelectrical coupler U2 by resistance R 21, the anode of the light-emitting diode of described photoelectrical coupler U2 connects the negative electrode of diode D15 by resistance R 20, described capacitor C 12 is connected between the negative electrode and ground of diode D15, the anode of described diode D15 connects the second subprime winding of the transformer of driver element, the collector electrode of the phototriode of described photoelectrical coupler U2 connects the control utmost point of thyristor D12 by resistance R 7, the anode of described thyristor D12 connects the power end of the control chip of the emitter of phototriode of photoelectrical coupler U2 and driver element simultaneously by resistance R 9, the negative electrode of described thyristor D12 connects the control end of switch element by resistance R 10, the cold end ground connection of described switch element, the Enable Pin of the control chip of the high potential termination driver element of described switch element.
In the said structure, described switch element is metal-oxide-semiconductor Q6, and the grid of described metal-oxide-semiconductor Q6 is the control end of switch element, and the source electrode of described metal-oxide-semiconductor Q6 is the cold end of switch element, and the drain electrode of described metal-oxide-semiconductor Q6 is the hot end of switch element.
Another purpose of the present utility model is to provide a kind of LED light fixture; described LED light fixture comprises LED load and LED lamp power drive circuit; described LED lamp power drive circuit comprises rectifier bridge, driver element and the short-circuit protection unit that is connected in turn between power supply and the LED load; it is characterized in that described short-circuit protection unit comprises:
Resistance R 7, resistance R 9, resistance R 10, resistance R 20, resistance R 21, capacitor C 12, thyristor D12, diode D15, diode D16, voltage stabilizing didoe ZD1, photoelectrical coupler U2 and switch element;
The negative electrode of described diode D16 connects the positive pole of LED load, the anode of described diode D16 connects the anode of voltage stabilizing didoe ZD1, the negative electrode of described voltage stabilizing didoe ZD1 connects the negative electrode of the light-emitting diode of photoelectrical coupler U2 by resistance R 21, the anode of the light-emitting diode of described photoelectrical coupler U2 connects the negative electrode of diode D15 by resistance R 20, described capacitor C 12 is connected between the negative electrode and ground of diode D15, the anode of described diode D15 connects the second subprime winding of the transformer of driver element, the collector electrode of the phototriode of described photoelectrical coupler U2 connects the control utmost point of thyristor D12 by resistance R 7, the anode of described thyristor D12 connects the power end of the control chip of the emitter of phototriode of photoelectrical coupler U2 and driver element simultaneously by resistance R 9, the negative electrode of described thyristor D12 connects the control end of switch element by resistance R 10, the cold end ground connection of described switch element, the Enable Pin of the control chip of the high potential termination driver element of described switch element.
In the said structure, described switch element is metal-oxide-semiconductor Q6, and the grid of described metal-oxide-semiconductor Q6 is the control end of switch element, and the source electrode of described metal-oxide-semiconductor Q6 is the cold end of switch element, and the drain electrode of described metal-oxide-semiconductor Q6 is the hot end of switch element.
In the utility model; when the LED load short circuits, the light-emitting diode of photoelectrical coupler U2 can be at instant igniting, and the phototriode of photoelectrical coupler U2 produces electric current; make thyristor D12 conducting; the level of the control end of switch element uprises, and the switch element conducting makes the level step-down of Enable Pin of control chip of driver element; control chip quits work; thereby realized short-circuit protection function, this short-circuit protection circuit adopts resolution element to realize, and is therefore simple in structure, cost is low.
Description of drawings
Fig. 1 is the circuit structure diagram of the LED lamp power drive circuit that provides of the utility model embodiment.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
Fig. 1 shows the circuit structure of the LED lamp power drive circuit that the utility model embodiment provides.
The LED light fixture comprises LED load and LED lamp power drive circuit, and LED lamp power drive circuit comprises rectifier bridge 100, driver element 200 and the short-circuit protection unit 300 that is connected in turn between power supply and the LED load, and short-circuit protection unit 300 comprises:
Resistance R 7, resistance R 9, resistance R 10, resistance R 20, resistance R 21, capacitor C 12, thyristor D12, diode D15, diode D16, voltage stabilizing didoe ZD1, photoelectrical coupler U2 and switch element 301;
The negative electrode of diode D16 connects the positive pole of LED load, the anode of diode D16 connects the anode of voltage stabilizing didoe ZD1, the negative electrode of voltage stabilizing didoe ZD1 connects the negative electrode of the light-emitting diode of photoelectrical coupler U2 by resistance R 21, the anode of the light-emitting diode of photoelectrical coupler U2 connects the negative electrode of diode D15 by resistance R 20, capacitor C 12 is connected between the negative electrode and ground of diode D15, the anode of diode D15 connects the second subprime winding (not shown) of the transformer of driver element 200, the collector electrode of the phototriode of photoelectrical coupler U2 connects the control utmost point of thyristor D12 by resistance R 7, the anode of thyristor D12 connects the power end (not shown) of the control chip of the emitter of phototriode of photoelectrical coupler U2 and driver element 200 simultaneously by resistance R 9, the negative electrode of thyristor D12 connects the control end of switch element 301 by resistance R 10, the cold end ground connection of switch element 301, the Enable Pin (not shown) of the control chip of the high potential termination driver element 200 of switch element 301.
As the utility model one embodiment, switch element 301 is metal-oxide-semiconductor Q6, and the grid of metal-oxide-semiconductor Q6 is the control end of switch element 301, and the source electrode of metal-oxide-semiconductor Q6 is the cold end of switch element 301, and the drain electrode of metal-oxide-semiconductor Q6 is the hot end of switch element 301.
In the utility model; when the LED load short circuits, the light-emitting diode of photoelectrical coupler U2 can be at instant igniting, and the phototriode of photoelectrical coupler U2 produces electric current; make thyristor D12 conducting; the level of the control end of switch element uprises, and the switch element conducting makes the level step-down of Enable Pin of control chip of driver element; control chip quits work; thereby realized short-circuit protection function, this short-circuit protection circuit adopts resolution element to realize, and is therefore simple in structure, cost is low.
The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.
Claims (4)
1. LED lamp power drive circuit, described LED lamp power drive circuit comprises rectifier bridge, driver element and the short-circuit protection unit that is connected in turn between power supply and the LED load, it is characterized in that, described short-circuit protection unit comprises:
Resistance R 7, resistance R 9, resistance R 10, resistance R 20, resistance R 21, capacitor C 12, thyristor D12, diode D15, diode D16, voltage stabilizing didoe ZD1, photoelectrical coupler U2 and switch element;
The negative electrode of described diode D16 connects the positive pole of LED load, the anode of described diode D16 connects the anode of voltage stabilizing didoe ZD1, the negative electrode of described voltage stabilizing didoe ZD1 connects the negative electrode of the light-emitting diode of photoelectrical coupler U2 by resistance R 21, the anode of the light-emitting diode of described photoelectrical coupler U2 connects the negative electrode of diode D15 by resistance R 20, described capacitor C 12 is connected between the negative electrode and ground of diode D15, the anode of described diode D15 connects the second subprime winding of the transformer of driver element, the collector electrode of the phototriode of described photoelectrical coupler U2 connects the control utmost point of thyristor D12 by resistance R 7, the anode of described thyristor D12 connects the power end of the control chip of the emitter of phototriode of photoelectrical coupler U2 and driver element simultaneously by resistance R 9, the negative electrode of described thyristor D12 connects the control end of switch element by resistance R 10, the cold end ground connection of described switch element, the Enable Pin of the control chip of the high potential termination driver element of described switch element.
2. LED lamp power drive circuit as claimed in claim 1, it is characterized in that, described switch element is metal-oxide-semiconductor Q6, the grid of described metal-oxide-semiconductor Q6 is the control end of switch element, the source electrode of described metal-oxide-semiconductor Q6 is the cold end of switch element, and the drain electrode of described metal-oxide-semiconductor Q6 is the hot end of switch element.
3. LED light fixture; described LED light fixture comprises LED load and LED lamp power drive circuit; described LED lamp power drive circuit comprises rectifier bridge, driver element and the short-circuit protection unit that is connected in turn between power supply and the LED load, it is characterized in that, described short-circuit protection unit comprises:
Resistance R 7, resistance R 9, resistance R 10, resistance R 20, resistance R 21, capacitor C 12, thyristor D12, diode D15, diode D16, voltage stabilizing didoe ZD1, photoelectrical coupler U2 and switch element;
The negative electrode of described diode D16 connects the positive pole of LED load, the anode of described diode D16 connects the anode of voltage stabilizing didoe ZD1, the negative electrode of described voltage stabilizing didoe ZD1 connects the negative electrode of the light-emitting diode of photoelectrical coupler U2 by resistance R 21, the anode of the light-emitting diode of described photoelectrical coupler U2 connects the negative electrode of diode D15 by resistance R 20, described capacitor C 12 is connected between the negative electrode and ground of diode D15, the anode of described diode D15 connects the second subprime winding of the transformer of driver element, the collector electrode of the phototriode of described photoelectrical coupler U2 connects the control utmost point of thyristor D12 by resistance R 7, the anode of described thyristor D12 connects the power end of the control chip of the emitter of phototriode of photoelectrical coupler U2 and driver element simultaneously by resistance R 9, the negative electrode of described thyristor D12 connects the control end of switch element by resistance R 10, the cold end ground connection of described switch element, the Enable Pin of the control chip of the high potential termination driver element of described switch element.
4. LED light fixture as claimed in claim 3, it is characterized in that described switch element is metal-oxide-semiconductor Q6, the grid of described metal-oxide-semiconductor Q6 is the control end of switch element, the source electrode of described metal-oxide-semiconductor Q6 is the cold end of switch element, and the drain electrode of described metal-oxide-semiconductor Q6 is the hot end of switch element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120127970 CN202005046U (en) | 2011-04-27 | 2011-04-27 | LED (light-emitting diode) lamp and power supply driving circuit of LED lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120127970 CN202005046U (en) | 2011-04-27 | 2011-04-27 | LED (light-emitting diode) lamp and power supply driving circuit of LED lamp |
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| Publication Number | Publication Date |
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| CN202005046U true CN202005046U (en) | 2011-10-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201120127970 Expired - Fee Related CN202005046U (en) | 2011-04-27 | 2011-04-27 | LED (light-emitting diode) lamp and power supply driving circuit of LED lamp |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103187720A (en) * | 2011-12-31 | 2013-07-03 | 广东德豪润达电气股份有限公司 | Short-circuit protective circuit and light-emitting diode (LED) power source circuit used for output end of active power factor correction (PFC) circuit |
| CN103840426A (en) * | 2012-11-21 | 2014-06-04 | 深圳市海洋王照明工程有限公司 | Step-up protection circuit |
| WO2015000221A1 (en) * | 2013-07-04 | 2015-01-08 | 京东方科技集团股份有限公司 | Driving circuit and light-emitting device |
| CN107752629A (en) * | 2017-11-23 | 2018-03-06 | 深圳佳莱知家科技有限公司 | A kind of cervical vertebra massage pillow |
| CN108322963A (en) * | 2018-03-20 | 2018-07-24 | 欧普照明股份有限公司 | A kind of short-circuit detection protection circuit |
| CN110213857A (en) * | 2019-06-21 | 2019-09-06 | 惠州市莱特照明科技有限公司 | LED drive circuit |
-
2011
- 2011-04-27 CN CN 201120127970 patent/CN202005046U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103187720A (en) * | 2011-12-31 | 2013-07-03 | 广东德豪润达电气股份有限公司 | Short-circuit protective circuit and light-emitting diode (LED) power source circuit used for output end of active power factor correction (PFC) circuit |
| CN103840426A (en) * | 2012-11-21 | 2014-06-04 | 深圳市海洋王照明工程有限公司 | Step-up protection circuit |
| CN103840426B (en) * | 2012-11-21 | 2018-04-27 | 深圳市海洋王照明工程有限公司 | One kind rises voltage protection circuit |
| WO2015000221A1 (en) * | 2013-07-04 | 2015-01-08 | 京东方科技集团股份有限公司 | Driving circuit and light-emitting device |
| US9247596B2 (en) | 2013-07-04 | 2016-01-26 | Boe Technology Group Co., Ltd. | Driving circuit for driving light-emitting circuit, and light-emitting device having the same |
| CN107752629A (en) * | 2017-11-23 | 2018-03-06 | 深圳佳莱知家科技有限公司 | A kind of cervical vertebra massage pillow |
| CN108322963A (en) * | 2018-03-20 | 2018-07-24 | 欧普照明股份有限公司 | A kind of short-circuit detection protection circuit |
| CN108322963B (en) * | 2018-03-20 | 2024-03-05 | 欧普照明股份有限公司 | Short circuit detection protection circuit |
| CN110213857A (en) * | 2019-06-21 | 2019-09-06 | 惠州市莱特照明科技有限公司 | LED drive circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: SHENZHEN OCEAN'S KING LIGHTING ENGINEERING Co.,Ltd. Assignor: OCEAN'S KING LIGHTING SCIENCE & TECHNOLOGY Co.,Ltd.|SHENZHEN OCEAN'S KING LIGHTING ENGINEERING Co.,Ltd. Contract record no.: 2011440020430 Denomination of utility model: LED (light-emitting diode) lamp and power supply driving circuit of LED lamp Granted publication date: 20111005 License type: Exclusive License Record date: 20111124 |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111005 Termination date: 20190427 |