CN201682279U - Power-source anti-reverse-connection circuit, LED lamp circuit and LED lamp - Google Patents
Power-source anti-reverse-connection circuit, LED lamp circuit and LED lamp Download PDFInfo
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- CN201682279U CN201682279U CN 201020197705 CN201020197705U CN201682279U CN 201682279 U CN201682279 U CN 201682279U CN 201020197705 CN201020197705 CN 201020197705 CN 201020197705 U CN201020197705 U CN 201020197705U CN 201682279 U CN201682279 U CN 201682279U
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Abstract
The utility model is suitable for the field of an LED lamp, providing a power-source anti-reverse-connection circuit, an LED lamp circuit and an LED lamp. The power-source anti-reverse-connection circuit comprises a switch module and a voltage offset module, and a MOS tube is used as the switch module. When a power source is reversely connected, the voltage offset module controls the MOS tube to turn off the power path of the LED lamp circuit, and therefore a role of power-source anti-reverse-connection is played. As the inner resistance of the MOS tube is small and voltage drop is low, the power dissipation is low.
Description
Technical field
The utility model belongs to the LED field of light fittings, relates in particular to a kind of circuit for preventing reverse connection of power supply, LED lamp circuit and LED light fixture.
Background technology
In the electronic equipment that uses external power supply,, can cause the nonvolatil damage of electronic equipment if the power supply of electronic equipment connects instead.
Present circuit for preventing reverse connection of power supply adopts diode, utilizes the unidirectional on state characteristic of diode to reach the purpose that prevents power supply reversal connection damage electronic equipment.But, because the pressure drop of diode is fixed, cause the power of its consumption excessive, produce heat, cause circuit stability to reduce.
The utility model content
The purpose of this utility model is to provide a kind of circuit for preventing reverse connection of power supply, is intended to solve existing circuit for preventing reverse connection of power supply and adopts diode to have the big problem of power consumption.
The utility model is achieved in that a kind of circuit for preventing reverse connection of power supply, and described circuit for preventing reverse connection of power supply comprises:
One switch module;
During the power supply reversal connection, control the voltage bias module that described switch module turn-offs the power path of LED lamp circuit;
The input termination positive source of described voltage bias module, first output of described voltage bias module and second output connect the input and the control end of described switch module respectively, the negative source electrode of the 3rd output termination LED lamp circuit of described voltage bias module, the positive source electrode of the output termination LED lamp circuit of described switch module;
Described switch module adopts metal-oxide-semiconductor Q3, and the source electrode of described metal-oxide-semiconductor Q3 is as the input of switch module, and the drain electrode of described metal-oxide-semiconductor Q3 is as the output of switch module, and the grid of described metal-oxide-semiconductor Q3 is as the control end of switch module.
In the said structure, described voltage bias module comprises:
First switch element, second switch element, divider resistance R1, divider resistance R2, divider resistance R3, divider resistance R4, divider resistance R5 and divider resistance R6;
First end of described first switch element is as the input termination positive source of described voltage bias module, second end of described first switch element is as the input of the described switch module of the first output termination of described voltage bias module, described divider resistance R1, divider resistance R2, divider resistance R3 and divider resistance R4 are connected in series successively, the public connecting end of described divider resistance R1 and divider resistance R2 connects the control end of described first switch element, the other end ground connection of described divider resistance R1, the public connecting end of described divider resistance R2 and divider resistance R3 connects second end of described first switch element, the public connecting end of described divider resistance R3 and divider resistance R4 is as the control end of the described switch module of the second output termination of described voltage bias module, first end of the described second switch element of another termination of described divider resistance R4, the second end ground connection of described second switch element, the control end of described second switch element is by divider resistance R6 ground connection, the public connecting end of the control end of described second switch element and divider resistance R6 connects first end of divider resistance R5, and second end of described divider resistance R5 is as the negative source electrode of the 3rd output termination LED lamp circuit of voltage bias module.
In the said structure, described first switch element adopts metal-oxide-semiconductor Q1, the drain electrode of described metal-oxide-semiconductor Q1 is as first end of first switch element, and the source electrode of described metal-oxide-semiconductor Q1 is as second end of first switch element, and the grid of described metal-oxide-semiconductor Q1 is as the control end of first switch element.
In the said structure, described second switch element adopts triode Q2, the collector electrode of described triode Q2 is as first end of second switch element, and the emitter of described triode Q2 is as second end of second switch element, and the base stage of described triode Q2 is as the control end of second switch element.
Another purpose of the present utility model is to provide a kind of LED lamp circuit, and described LED lamp circuit comprises circuit for preventing reverse connection of power supply, and described circuit for preventing reverse connection of power supply comprises:
One switch module;
During the power supply reversal connection, control the voltage bias module that described switch module turn-offs the power path of LED lamp circuit;
The input termination positive source of described voltage bias module, first output of described voltage bias module and second output connect the input and the control end of described switch module respectively, the negative source electrode of the 3rd output termination LED lamp circuit of described voltage bias module, the positive source electrode of the output termination LED lamp circuit of described switch module;
Described switch module adopts metal-oxide-semiconductor Q3, and the source electrode of described metal-oxide-semiconductor Q3 is as the input of switch module, and the drain electrode of described metal-oxide-semiconductor Q3 is as the output of switch module, and the grid of described metal-oxide-semiconductor Q3 is as the control end of switch module.
In the said structure, described voltage bias module comprises:
First switch element, second switch element, divider resistance R1, divider resistance R2, divider resistance R3, divider resistance R4, divider resistance R5 and divider resistance R6;
First end of described first switch element is as the input termination positive source of described voltage bias module, second end of described first switch element is as the input of the described switch module of the first output termination of described voltage bias module, described divider resistance R1, divider resistance R2, divider resistance R3 and divider resistance R4 are connected in series successively, the public connecting end of described divider resistance R1 and divider resistance R2 connects the control end of described first switch element, the other end ground connection of described divider resistance R1, the public connecting end of described divider resistance R2 and divider resistance R3 connects second end of described first switch element, the public connecting end of described divider resistance R3 and divider resistance R4 is as the control end of the described switch module of the second output termination of described voltage bias module, first end of the described second switch element of another termination of described divider resistance R4, the second end ground connection of described second switch element, the control end of described second switch element is by divider resistance R6 ground connection, the public connecting end of the control end of described second switch element and divider resistance R6 connects first end of divider resistance R5, and second end of described divider resistance R5 is as the negative source electrode of the 3rd output termination LED lamp circuit of voltage bias module.
In the said structure, described first switch element adopts metal-oxide-semiconductor Q1, the drain electrode of described metal-oxide-semiconductor Q1 is as first end of first switch element, and the source electrode of described metal-oxide-semiconductor Q1 is as second end of first switch element, and the grid of described metal-oxide-semiconductor Q1 is as the control end of first switch element.
In the said structure, described second switch element adopts triode Q2, the collector electrode of described triode Q2 is as first end of second switch element, and the emitter of described triode Q2 is as second end of second switch element, and the base stage of described triode Q2 is as the control end of second switch element.
Another purpose of the present utility model is to provide a kind of LED light fixture that comprises above-mentioned LED lamp circuit.
In the utility model, this circuit for preventing reverse connection of power supply comprises switch module and voltage bias module, and adopt metal-oxide-semiconductor as switch module, when the power supply reversal connection, voltage bias module controls metal-oxide-semiconductor turn-offs the power path of LED lamp circuit, thereby plays the effect of power supply reverse connection protection, and because the metal-oxide-semiconductor internal resistance is little, pressure drop is little, so its power consumption is little.
Description of drawings
Fig. 1 is the structure chart of the circuit for preventing reverse connection of power supply that provides of the utility model embodiment;
Fig. 2 is the exemplary circuit figure of the circuit for preventing reverse connection of power supply 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.
Among the utility model embodiment, this circuit for preventing reverse connection of power supply comprises switch module and voltage bias module, and adopt metal-oxide-semiconductor as switch module, when the power supply reversal connection, voltage bias module controls metal-oxide-semiconductor turn-offs the power path of LED lamp circuit, thereby plays the effect of power supply reverse connection protection, and because the metal-oxide-semiconductor internal resistance is little, pressure drop is little, so its power consumption is little.
Fig. 1 shows the structure of the circuit for preventing reverse connection of power supply that the utility model embodiment provides, and for convenience of explanation, only shows the part relevant with the utility model embodiment.
Circuit for preventing reverse connection of power supply comprises switch module 100 and voltage bias module 200;
The input termination positive source of voltage bias module 200, first output of voltage bias module 200 and second output connect the input and the control end of switch module 100 respectively, the negative source electrode of the 3rd output termination LED lamp circuit of voltage bias module 200, the positive source electrode of the output termination LED lamp circuit of switch module 100;
Fig. 2 shows the exemplary circuit structure of the circuit for preventing reverse connection of power supply that the utility model embodiment provides, and for convenience of explanation, only shows the part relevant with the utility model embodiment.
As the utility model one embodiment, switch module 100 adopts metal-oxide-semiconductor Q3, and the source electrode of metal-oxide-semiconductor Q3 is as the input of switch module 100, and the drain electrode of metal-oxide-semiconductor Q3 is as the output of switch module 100, and the grid of metal-oxide-semiconductor Q3 is as the control end of switch module 100.
As the utility model one embodiment, voltage bias module 200 comprises:
First end of first switch element 201 is as the input termination positive source of voltage bias module 200, second end of first switch element 201 is as the input of the first output termination switch module 100 of voltage bias module 200, divider resistance R1, divider resistance R2, divider resistance R3 and divider resistance R4 are connected in series successively, the public connecting end of divider resistance R1 and divider resistance R2 connects the control end of first switch element 201, the other end ground connection of divider resistance R1, the public connecting end of divider resistance R2 and divider resistance R3 connects second end of first switch element 201, the public connecting end of divider resistance R3 and divider resistance R4 is as the control end of the second output termination switch module 100 of voltage bias module 200, first end of another termination second switch element 202 of divider resistance R4, the second end ground connection of second switch element 202, the control end of second switch element 202 is by divider resistance R6 ground connection, the public connecting end of the control end of second switch element 202 and divider resistance R6 connects first end of divider resistance R5, and second end of divider resistance R5 is as the negative source electrode of the 3rd output termination LED lamp circuit of voltage bias module 200.
As the utility model one embodiment, first switch element 201 adopts metal-oxide-semiconductor Q1, the drain electrode of metal-oxide-semiconductor Q1 is as first end of first switch element 201, and the source electrode of metal-oxide-semiconductor Q1 is as second end of first switch element 201, and the grid of metal-oxide-semiconductor Q1 is as the control end of first switch element 201.
As the utility model one embodiment, second switch element 202 adopts triode Q2, the collector electrode of triode Q2 is as first end of second switch element 202, the emitter of triode Q2 is as second end of second switch element 202, and the base stage of triode Q2 is as the control end of second switch element 202.
The utility model embodiment also provides a kind of LED lamp circuit that comprises above-mentioned circuit for preventing reverse connection of power supply.
The utility model embodiment also provides a kind of LED light fixture that comprises above-mentioned LED lamp circuit.
The operation principle of this circuit for preventing reverse connection of power supply is:
When power supply normally inserts, voltage bias module 200 is for providing forward bias voltage between the grid of metal-oxide-semiconductor Q3 and the source electrode, and metal-oxide-semiconductor Q3 conducting has electric current to pass through between the drain electrode of metal-oxide-semiconductor Q3 and the source electrode, the power path conducting of LED lamp circuit, LED light fixture operate as normal;
When power supply connects inverse time, voltage bias module 200 is for providing reverse bias voltage between the grid of metal-oxide-semiconductor Q3 and the source electrode, and not conducting of metal-oxide-semiconductor Q3 does not have electric current to pass through between the drain electrode of metal-oxide-semiconductor Q3 and the source electrode, the power path of LED lamp circuit disconnects, and prevents that the LED light fixture is damaged.
In the utility model embodiment, this circuit for preventing reverse connection of power supply comprises switch module and voltage bias module, and adopt metal-oxide-semiconductor as switch module, when the power supply reversal connection, voltage bias module controls metal-oxide-semiconductor turn-offs the power path of LED lamp circuit, thereby plays the effect of power supply reverse connection protection, and because the metal-oxide-semiconductor internal resistance is little, pressure drop is little, so its power consumption is little.
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 (9)
1. a circuit for preventing reverse connection of power supply is characterized in that, described circuit for preventing reverse connection of power supply comprises:
One switch module;
During the power supply reversal connection, control the voltage bias module that described switch module turn-offs the power path of LED lamp circuit;
The input termination positive source of described voltage bias module, first output of described voltage bias module and second output connect the input and the control end of described switch module respectively, the negative source electrode of the 3rd output termination LED lamp circuit of described voltage bias module, the positive source electrode of the output termination LED lamp circuit of described switch module;
Described switch module adopts metal-oxide-semiconductor Q3, and the source electrode of described metal-oxide-semiconductor Q3 is as the input of switch module, and the drain electrode of described metal-oxide-semiconductor Q3 is as the output of switch module, and the grid of described metal-oxide-semiconductor Q3 is as the control end of switch module.
2. circuit for preventing reverse connection of power supply as claimed in claim 1 is characterized in that, described voltage bias module comprises:
First switch element, second switch element, divider resistance R1, divider resistance R2, divider resistance R3, divider resistance R4, divider resistance R5 and divider resistance R6;
First end of described first switch element is as the input termination positive source of described voltage bias module, second end of described first switch element is as the input of the described switch module of the first output termination of described voltage bias module, described divider resistance R1, divider resistance R2, divider resistance R3 and divider resistance R4 are connected in series successively, the public connecting end of described divider resistance R1 and divider resistance R2 connects the control end of described first switch element, the other end ground connection of described divider resistance R1, the public connecting end of described divider resistance R2 and divider resistance R3 connects second end of described first switch element, the public connecting end of described divider resistance R3 and divider resistance R4 is as the control end of the described switch module of the second output termination of described voltage bias module, first end of the described second switch element of another termination of described divider resistance R4, the second end ground connection of described second switch element, the control end of described second switch element is by divider resistance R6 ground connection, the public connecting end of the control end of described second switch element and divider resistance R6 connects first end of divider resistance R5, and second end of described divider resistance R5 is as the negative source electrode of the 3rd output termination LED lamp circuit of voltage bias module.
3. circuit for preventing reverse connection of power supply as claimed in claim 2, it is characterized in that, described first switch element adopts metal-oxide-semiconductor Q1, the drain electrode of described metal-oxide-semiconductor Q1 is as first end of first switch element, the source electrode of described metal-oxide-semiconductor Q1 is as second end of first switch element, and the grid of described metal-oxide-semiconductor Q1 is as the control end of first switch element.
4. circuit for preventing reverse connection of power supply as claimed in claim 2, it is characterized in that, described second switch element adopts triode Q2, the collector electrode of described triode Q2 is as first end of second switch element, the emitter of described triode Q2 is as second end of second switch element, and the base stage of described triode Q2 is as the control end of second switch element.
5. a LED lamp circuit is characterized in that, described LED lamp circuit comprises circuit for preventing reverse connection of power supply, and described circuit for preventing reverse connection of power supply comprises:
One switch module;
During the power supply reversal connection, control the voltage bias module that described switch module turn-offs the power path of LED lamp circuit;
The input termination positive source of described voltage bias module, first output of described voltage bias module and second output connect the input and the control end of described switch module respectively, the negative source electrode of the 3rd output termination LED lamp circuit of described voltage bias module, the positive source electrode of the output termination LED lamp circuit of described switch module;
Described switch module adopts metal-oxide-semiconductor Q3, and the source electrode of described metal-oxide-semiconductor Q3 is as the input of switch module, and the drain electrode of described metal-oxide-semiconductor Q3 is as the output of switch module, and the grid of described metal-oxide-semiconductor Q3 is as the control end of switch module.
6. LED lamp circuit as claimed in claim 5 is characterized in that, described voltage bias module comprises:
First switch element, second switch element, divider resistance R1, divider resistance R2, divider resistance R3, divider resistance R4, divider resistance R5 and divider resistance R6;
First end of described first switch element is as the input termination positive source of described voltage bias module, second end of described first switch element is as the input of the described switch module of the first output termination of described voltage bias module, described divider resistance R1, divider resistance R2, divider resistance R3 and divider resistance R4 are connected in series successively, the public connecting end of described divider resistance R1 and divider resistance R2 connects the control end of described first switch element, the other end ground connection of described divider resistance R1, the public connecting end of described divider resistance R2 and divider resistance R3 connects second end of described first switch element, the public connecting end of described divider resistance R3 and divider resistance R4 is as the control end of the described switch module of the second output termination of described voltage bias module, first end of the described second switch element of another termination of described divider resistance R4, the second end ground connection of described second switch element, the control end of described second switch element is by divider resistance R6 ground connection, the public connecting end of the control end of described second switch element and divider resistance R6 connects first end of divider resistance R5, and second end of described divider resistance R5 is as the negative source electrode of the 3rd output termination LED lamp circuit of voltage bias module.
7. LED lamp circuit as claimed in claim 6, it is characterized in that, described first switch element adopts metal-oxide-semiconductor Q1, the drain electrode of described metal-oxide-semiconductor Q1 is as first end of first switch element, the source electrode of described metal-oxide-semiconductor Q1 is as second end of first switch element, and the grid of described metal-oxide-semiconductor Q1 is as the control end of first switch element.
8. LED lamp circuit as claimed in claim 6, it is characterized in that, described second switch element adopts triode Q2, the collector electrode of described triode Q2 is as first end of second switch element, the emitter of described triode Q2 is as second end of second switch element, and the base stage of described triode Q2 is as the control end of second switch element.
9. a LED light fixture is characterized in that, described LED light fixture comprises each described LED lamp circuit as claim 5-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020197705 CN201682279U (en) | 2010-05-19 | 2010-05-19 | Power-source anti-reverse-connection circuit, LED lamp circuit and LED lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020197705 CN201682279U (en) | 2010-05-19 | 2010-05-19 | Power-source anti-reverse-connection circuit, LED lamp circuit and LED lamp |
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| Publication Number | Publication Date |
|---|---|
| CN201682279U true CN201682279U (en) | 2010-12-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201020197705 Expired - Fee Related CN201682279U (en) | 2010-05-19 | 2010-05-19 | Power-source anti-reverse-connection circuit, LED lamp circuit and LED lamp |
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| CN (1) | CN201682279U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103188851A (en) * | 2011-12-31 | 2013-07-03 | 海洋王照明科技股份有限公司 | Light-emitting diode (LED) constant current drive circuit |
| CN103280794A (en) * | 2013-06-14 | 2013-09-04 | 成都锐奕信息技术有限公司 | Surging resistant and reverse-connection resistant port |
| CN114333636A (en) * | 2021-12-03 | 2022-04-12 | 江苏航天大为科技股份有限公司 | Full-transparent type luminous label controller |
-
2010
- 2010-05-19 CN CN 201020197705 patent/CN201682279U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103188851A (en) * | 2011-12-31 | 2013-07-03 | 海洋王照明科技股份有限公司 | Light-emitting diode (LED) constant current drive circuit |
| CN103188851B (en) * | 2011-12-31 | 2016-08-03 | 海洋王照明科技股份有限公司 | Constant current driver circuit for LED |
| CN103280794A (en) * | 2013-06-14 | 2013-09-04 | 成都锐奕信息技术有限公司 | Surging resistant and reverse-connection resistant port |
| CN114333636A (en) * | 2021-12-03 | 2022-04-12 | 江苏航天大为科技股份有限公司 | Full-transparent type luminous label controller |
| CN114333636B (en) * | 2021-12-03 | 2023-03-24 | 江苏航天大为科技股份有限公司 | Full-transparent type luminous label controller |
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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: Circuit for preventing reverse connection of power supply, LED lamp circuit and LED lamp Granted publication date: 20101222 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: 20101222 Termination date: 20190519 |