CN211606871U - Starting protection module driven by LED vehicle lamp - Google Patents
Starting protection module driven by LED vehicle lamp Download PDFInfo
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- CN211606871U CN211606871U CN202020545506.1U CN202020545506U CN211606871U CN 211606871 U CN211606871 U CN 211606871U CN 202020545506 U CN202020545506 U CN 202020545506U CN 211606871 U CN211606871 U CN 211606871U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The utility model provides a starting protection module applied to the driving of an LED car lamp, which comprises a main driving circuit used for supplying power to a load; the sampling circuit is used for collecting an output current signal; a load for implementing a lighting function; a comparison circuit for determining whether system requirements are met; and a dummy load for increasing the driving current. The control circuit: for controlling the dummy load circuit to be turned on and off. The utility model discloses can be when main drive circuit output current is less, add the dummy load circuit automatically for with the increase of driven output current, solved LED car light drive output current unstable when just starting, probably because of the electric current undersize, detection circuitry can't detect the electric current and report the mistake, the unable problem of normally starting of drive.
Description
Technical Field
The utility model relates to an automotive lighting field specifically relates to a LED car light driven starts protection module.
Background
With the development of the automobile illumination industry, the LED automobile lamp gradually becomes the mainstream choice of automobile illumination by virtue of the characteristics of high response speed, energy conservation, environmental protection and the like. In the LED driving circuit, when the output current of the main driving circuit is too small, the detection circuit may not detect the current, so that the driving circuit cannot operate normally, which reduces the reliability of the LED lamp and makes it difficult to cope with a complicated application environment.
SUMMERY OF THE UTILITY MODEL
To the defect among the prior art, the utility model aims at providing a LED car light driven starts protection module.
According to the utility model provides a this application discloses a start protection module of LED car light drive, including main drive circuit, sampling circuit, load circuit, comparison circuit and dummy load circuit;
the input end of the main driving circuit is electrically connected with a vehicle-mounted power supply, and the main driving circuit is used for converting a primary power supply into an output environment required by a specific load;
the output end of the main driving circuit is electrically connected with the input end of the sampling circuit;
the output end of the sampling circuit is electrically connected with the input end of the load circuit and the input end of the comparison circuit respectively, and the sampling circuit is used for detecting current; and
the output end of the comparison circuit is electrically connected with the input end of the dummy load circuit.
In a preferred example, the sampling circuit comprises a first capacitor C1, a first diode D1, a second diode D2, a first triode Q1 and a second triode Q2; the input terminal of the sampling circuit comprises a first input terminal; the output end of the sampling circuit comprises a first output end;
the first input end is electrically connected with the first output end through a first resistor R1;
the first input end is electrically connected with a fourth node through a second resistor R2;
the first input end is electrically connected with one end of a third resistor R3;
the other end of the third resistor R3 is electrically connected with a first node;
one end of the first resistor R1 is electrically connected with one end of a third resistor R3;
the other end of the third resistor R3 is electrically connected with one end of a first capacitor C1;
the other end of the first capacitor C1 is electrically connected with a first node, and the other end of the first capacitor C1 is electrically connected with a second node;
the other end of the first resistor R1 is electrically connected with a second node;
the anode of the first diode D1 is electrically connected to the second node;
the cathode of the first diode D1 is electrically connected with a third node;
the emitter of the first triode Q1 is electrically connected with a first node;
the base stage of the first triode Q1 is electrically connected with a third node;
the collector of the first triode Q1 is electrically connected with a fourth node;
the fourth node is electrically connected with the anode of a second diode D2;
the cathode of the second diode D2 is electrically connected with the comparison circuit;
the base stage of the second triode Q2 is electrically connected with a fourth node;
the collector of the second triode Q2 is electrically connected with a third node; and
the emitter of the second transistor Q2 is electrically connected with the comparison circuit.
In a preferred embodiment, the first resistor R1 is a detection resistor.
In a preferred embodiment, the comparison circuit includes an operational amplifier;
the reverse input end of the operational amplifier is electrically connected with the cathode of a second diode of the sampling circuit;
the cathode of the second diode is grounded through a fifth resistor R5;
the emitter of a second triode Q2 of the sampling circuit is grounded through a sixth resistor R6;
the comparison circuit further comprises a direct current power supply and a second capacitor C2;
the direct current power supply is grounded through a second capacitor C2;
the direct current power supply is electrically connected with one end of a seventh resistor R7 through a fourth resistor R4;
the other end of the seventh resistor R7 is grounded; and
the input of the operational amplifier is electrically connected to one end of a seventh resistor R7.
In a preferred embodiment, the device further comprises a control circuit; the output end of the control circuit is electrically connected with the dummy load circuit; the control circuit receives a control signal output by the main driving circuit;
the control circuit comprises a control end, a ninth resistor, a third triode Q3 and a third capacitor C3;
the control end is respectively and electrically connected with one end of a ninth resistor and the base level of a third triode Q3 through an eighth resistor R8;
the other end of the ninth resistor is grounded;
the emitter of the third triode Q3 is grounded, and the collector of the third triode Q3 is electrically connected with the direct current power supply through a tenth resistor R10;
the dc power supply is connected to ground via a third capacitor C3.
In a preferred example, the dummy load circuit comprises a direct current power supply, a fourth capacitor C4, a fourth transistor Q4 and a fifth transistor Q5;
the direct current power supply is respectively grounded through a fourth capacitor C4 and electrically connected with one end of an eleventh resistor R11 through a fourth triode Q4, wherein a collector of the fourth triode Q4 is electrically connected with the direct current power supply, and an emitter of the fourth triode Q4 is electrically connected with one end of an eleventh resistor R11;
the other end of the eleventh resistor R11 is electrically connected with the base stage of the fifth triode Q5;
the emitter of the fifth triode Q5 is grounded through a twelfth resistor R12, a thirteenth resistor R13 and a fourteenth resistor R14, respectively;
the collector of the fifth triode Q5 is electrically connected with the cathode of a third diode D3;
the dummy load circuit further comprises a second input end and a second output end;
the anode of the third diode D3 is electrically connected to the second input terminal and the second output terminal, respectively.
In a preferred embodiment, the base stage of the fourth transistor Q4 is electrically connected to the first output terminal of the comparison circuit;
the base stage of the fourth transistor Q4 receives a control signal from the main drive circuit via the control circuit.
In a preferred embodiment, the voltage of the dc power supply is 5V.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model provides a LED car light driven starts protection module is when main drive circuit output current is less, and the system will insert the dummy load circuit automatically for output current increases, thereby satisfies the normal operating requirement of system, has avoided because of output current is less, and detection circuitry can't detect the electric current, leads to the unable problem of normally starting of whole circuit, strengthens the reliability of system.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
fig. 1 is a schematic diagram of a start protection module driven by an LED vehicle lamp.
Fig. 2 is a schematic diagram of a sampling circuit and a comparison circuit.
Fig. 3 is a control signal circuit schematic.
FIG. 4 is a schematic diagram of a dummy load circuit.
Description of reference numerals:
1 first input (sampling circuit)
2 first output (sampling circuit)
3 control terminal
4 second input (dummy load circuit)
5 second output (dummy load circuit)
Detailed Description
The present invention will be described in detail with reference to the following embodiments. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that various changes and modifications can be made by one skilled in the art without departing from the spirit of the invention. These all belong to the protection scope of the present invention.
The application provides a starting protection module for driving an LED car lamp, which comprises a main driving circuit, a sampling circuit, a load circuit, a comparison circuit and a dummy load circuit; the input end of the main driving circuit is electrically connected with a vehicle-mounted power supply, and the main driving circuit is used for converting a primary power supply into an output environment required by a specific load; the output end of the main driving circuit is electrically connected with the input end of the sampling circuit; the output end of the sampling circuit is electrically connected with the input end of the load circuit and the input end of the comparison circuit respectively, and the sampling circuit is used for detecting current; and the output of the comparison circuit is electrically connected to the input 4 of the dummy load circuit.
The main drive circuit has a fault detection function and can output a fault signal.
The sampling circuit comprises a first capacitor C1, a first diode D1, a second diode D2, a first triode Q1 and a second triode Q2; the input end of the sampling circuit comprises a first input end 1; the output of the sampling circuit comprises a first output 2; the first input end 1 is electrically connected with the first output end 2 through a first resistor R1; the first input end 1 is electrically connected with a fourth node through a second resistor R2; the first input end 1 is electrically connected with one end of a third resistor R3; the other end of the third resistor R3 is electrically connected with a first node; one end of the first resistor R1 is electrically connected with one end of a third resistor R3; the other end of the third resistor R3 is electrically connected with one end of a first capacitor C1; the other end of the first capacitor C1 is electrically connected with a first node, and the other end of the first capacitor C1 is electrically connected with a second node; the other end of the first resistor R1 is electrically connected with a second node; the anode of the first diode D1 is electrically connected to the second node; the cathode of the first diode D1 is electrically connected with a third node; the emitter of the first triode Q1 is electrically connected with a first node; the base stage of the first triode Q1 is electrically connected with a third node; the collector of the first triode Q1 is electrically connected with a fourth node; the fourth node is electrically connected with the anode of a second diode D2; the cathode of the second diode D2 is electrically connected with the comparison circuit; the base stage of the second triode Q2 is electrically connected with a fourth node; the collector of the second triode Q2 is electrically connected with a third node; and the emitter of the second triode Q2 is electrically connected with the comparison circuit.
The first resistor R1 is a detection resistor. The comparison circuit comprises an operational amplifier;
the reverse input end of the operational amplifier is electrically connected with the cathode of a second diode of the sampling circuit; the cathode of the second diode is grounded through a fifth resistor R5; the emitter of a second triode Q2 of the sampling circuit is grounded through a sixth resistor R6; the comparison circuit further comprises a direct current power supply and a second capacitor C2; the direct current power supply is grounded through a second capacitor C2; the direct current power supply is electrically connected with one end of a seventh resistor R7 through a fourth resistor R4; the other end of the seventh resistor R7 is grounded; and the same-direction input end of the operational amplifier is electrically connected with one end of a seventh resistor R7. Furthermore, in the comparison circuit, the voltage across the sixth resistor R6 is connected to the inverting input terminal of the operational amplifier, and the inverting input terminal obtains the preset voltage by dividing the voltage across the fourth resistor R4 and the seventh resistor R7.
The starting protection module for the LED vehicle lamp driving further comprises a control circuit; the output end of the control circuit is electrically connected with the dummy load circuit; the control circuit receives a control signal output by the main driving circuit; the control circuit comprises a control end, a ninth resistor, a third triode Q3 and a third capacitor C3; the control end is respectively and electrically connected with one end of a ninth resistor and the base level of a third triode Q3 through an eighth resistor R8; the other end of the ninth resistor is grounded; the emitter of the third triode Q3 is grounded, and the collector of the third triode Q3 is electrically connected with the direct current power supply through a tenth resistor R10; the dc power supply is connected to ground via a third capacitor C3.
The dummy load circuit comprises a direct current power supply, a fourth capacitor C4, a fourth triode Q4 and a fifth triode Q5; the direct current power supply is respectively grounded through a fourth capacitor C4 and electrically connected with one end of an eleventh resistor R11 through a fourth triode Q4, wherein a collector of the fourth triode Q4 is electrically connected with the direct current power supply, and an emitter of the fourth triode Q4 is electrically connected with one end of an eleventh resistor R11; the other end of the eleventh resistor R11 is electrically connected with the base stage of the fifth triode Q5; the emitter of the fifth triode Q5 is grounded through a twelfth resistor R12, a thirteenth resistor R13 and a fourteenth resistor R14, respectively; the collector of the fifth triode Q5 is electrically connected with the cathode of a third diode D3; the dummy load circuit further comprises a second input end 4 and a second output end 5; the anodes of the third diodes D3 are electrically connected to the second input terminal 4 and the second output terminal 5, respectively.
The base stage of the fourth triode Q4 is electrically connected with the first output end 2 of the comparison circuit; the base stage of the fourth transistor Q4 receives a control signal from the main drive circuit via the control circuit. The voltage of the direct current power supply is 5V.
The following further description is made with reference to the accompanying drawings:
as shown in fig. 1, the present application provides a start protection module for driving an LED vehicle lamp, which includes a main driving circuit, a sampling circuit, a load, a comparison circuit, a dummy load circuit, and a control circuit.
The main driving circuit is used for converting a primary power supply into an output environment required by a specific load, and comprises a function of outputting a control signal, and the main driving circuit gives a control signal when a system normally operates and is used for controlling the on and off of the dummy load circuit.
The sampling circuit detects current by connecting small resistors in series, the resistors need to be as small as possible to mitigate the effect on the main circuit.
The voltage of the sixth resistor R6 of the comparison circuit is connected to the inverting input end of the operational amplifier, and the inverting input end of the comparison circuit obtains a preset voltage through the voltage division mode of the fourth resistor R4 and the seventh resistor R7. And converting the collected current signal into a voltage signal, comparing the voltage signal with a preset voltage through an operational amplifier, and outputting a control signal.
The load is formed by connecting a plurality of LEDs in series.
The base electrode of a fourth triode Q4 of the dummy load circuit is simultaneously connected with the output end of the comparison circuit and the control signal, the collector electrode of a fifth triode Q5 is connected with the main driving circuit, and only when the comparison circuit and the control signal output high level simultaneously, the fourth triode Q4 is conducted, so that the fifth triode Q5 is conducted in a following mode.
The control circuit controls signals from the main driving circuit.
The foregoing description of the specific embodiments of the invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (8)
1. A starting protection module driven by an LED vehicle lamp is characterized by comprising a main driving circuit, a sampling circuit, a load circuit, a comparison circuit and a dummy load circuit;
the input end of the main driving circuit is electrically connected with a vehicle-mounted power supply, and the main driving circuit is used for converting a primary power supply into an output environment required by a specific load;
the output end of the main driving circuit is electrically connected with the input end of the sampling circuit;
the output end of the sampling circuit is electrically connected with the input end of the load circuit and the input end of the comparison circuit respectively, and the sampling circuit is used for detecting current; and
the output end of the comparison circuit is electrically connected with the input end of the dummy load circuit.
2. The start protection module of the LED car lamp driver according to claim 1, wherein the sampling circuit comprises a first capacitor C1, a first diode D1, a second diode D2, a first triode Q1 and a second triode Q2; the input of the sampling circuit comprises a first input (1); the output of the sampling circuit comprises a first output (2);
the first input end (1) is electrically connected with the first output end (2) through a first resistor R1;
the first input end (1) is electrically connected with a fourth node through a second resistor R2;
the first input end (1) is electrically connected with one end of a third resistor R3;
the other end of the third resistor R3 is electrically connected with a first node;
one end of the first resistor R1 is electrically connected with one end of a third resistor R3;
the other end of the third resistor R3 is electrically connected with one end of a first capacitor C1;
the other end of the first capacitor C1 is electrically connected with a first node, and the other end of the first capacitor C1 is electrically connected with a second node;
the other end of the first resistor R1 is electrically connected with a second node;
the anode of the first diode D1 is electrically connected to the second node;
the cathode of the first diode D1 is electrically connected with a third node;
the emitter of the first triode Q1 is electrically connected with a first node;
the base stage of the first triode Q1 is electrically connected with a third node;
the collector of the first triode Q1 is electrically connected with a fourth node;
the fourth node is electrically connected with the anode of a second diode D2;
the cathode of the second diode D2 is electrically connected with the comparison circuit;
the base stage of the second triode Q2 is electrically connected with a fourth node;
the collector of the second triode Q2 is electrically connected with a third node; and
the emitter of the second transistor Q2 is electrically connected with the comparison circuit.
3. The start protection module for the LED vehicle lamp driver according to claim 2, wherein the first resistor R1 is a detection resistor.
4. The start-up protection module of an LED vehicle lamp driver according to claim 2, wherein the comparison circuit comprises an operational amplifier;
the reverse input end of the operational amplifier is electrically connected with the cathode of a second diode of the sampling circuit;
the cathode of the second diode is grounded through a fifth resistor R5;
the emitter of a second triode Q2 of the sampling circuit is grounded through a sixth resistor R6;
the comparison circuit further comprises a direct current power supply and a second capacitor C2;
the direct current power supply is grounded through a second capacitor C2;
the direct current power supply is electrically connected with one end of a seventh resistor R7 through a fourth resistor R4;
the other end of the seventh resistor R7 is grounded; and
the input of the operational amplifier is electrically connected to one end of a seventh resistor R7.
5. The start-up protection module for driving the LED vehicle lamp according to claim 1, further comprising a control circuit; the output end of the control circuit is electrically connected with the dummy load circuit; the control circuit receives a control signal output by the main driving circuit;
the control circuit comprises a control end, a ninth resistor, a third triode Q3 and a third capacitor C3;
the control end is respectively and electrically connected with one end of a ninth resistor and the base level of a third triode Q3 through an eighth resistor R8;
the other end of the ninth resistor is grounded;
the emitter of the third triode Q3 is grounded, and the collector of the third triode Q3 is electrically connected with the direct current power supply through a tenth resistor R10;
the dc power supply is connected to ground via a third capacitor C3.
6. The start protection module for driving the LED car lamp according to claim 1, wherein the dummy load circuit comprises a DC power supply, a fourth capacitor C4, a fourth transistor Q4 and a fifth transistor Q5;
the direct current power supply is respectively grounded through a fourth capacitor C4 and electrically connected with one end of an eleventh resistor R11 through a fourth triode Q4, wherein a collector of the fourth triode Q4 is electrically connected with the direct current power supply, and an emitter of the fourth triode Q4 is electrically connected with one end of an eleventh resistor R11;
the other end of the eleventh resistor R11 is electrically connected with the base stage of the fifth triode Q5;
the emitter of the fifth triode Q5 is grounded through a twelfth resistor R12, a thirteenth resistor R13 and a fourteenth resistor R14, respectively;
the collector of the fifth triode Q5 is electrically connected with the cathode of a third diode D3;
the dummy load circuit further comprises a second input end (4) and a second output end (5);
the anode of the third diode D3 is electrically connected to the second input terminal (4) and the second output terminal (5), respectively.
7. The start-up protection module of the LED lamp driver according to claim 6, wherein the base stage of the fourth transistor Q4 is electrically connected to the first output terminal (2) of the comparison circuit;
the base stage of the fourth transistor Q4 receives a control signal from the main drive circuit via the control circuit.
8. The start protection module for driving the LED car lamp according to any one of claims 4 to 7, wherein the voltage of the DC power supply is 5V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020545506.1U CN211606871U (en) | 2020-04-14 | 2020-04-14 | Starting protection module driven by LED vehicle lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020545506.1U CN211606871U (en) | 2020-04-14 | 2020-04-14 | Starting protection module driven by LED vehicle lamp |
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| Publication Number | Publication Date |
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| CN211606871U true CN211606871U (en) | 2020-09-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020545506.1U Active CN211606871U (en) | 2020-04-14 | 2020-04-14 | Starting protection module driven by LED vehicle lamp |
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| CN (1) | CN211606871U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114488873A (en) * | 2021-12-24 | 2022-05-13 | 深圳市联洲国际技术有限公司 | Control circuit and device |
-
2020
- 2020-04-14 CN CN202020545506.1U patent/CN211606871U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114488873A (en) * | 2021-12-24 | 2022-05-13 | 深圳市联洲国际技术有限公司 | Control circuit and device |
| CN114488873B (en) * | 2021-12-24 | 2024-05-03 | 深圳市联洲国际技术有限公司 | Control circuit and device |
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