CN220511290U - Open-circuit monitoring one-off all-off LED control circuit - Google Patents
Open-circuit monitoring one-off all-off LED control circuit Download PDFInfo
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- CN220511290U CN220511290U CN202322168513.0U CN202322168513U CN220511290U CN 220511290 U CN220511290 U CN 220511290U CN 202322168513 U CN202322168513 U CN 202322168513U CN 220511290 U CN220511290 U CN 220511290U
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 14
- 238000011084 recovery Methods 0.000 claims abstract description 19
- 239000003990 capacitor Substances 0.000 claims description 119
- 230000002093 peripheral effect Effects 0.000 claims description 8
- 230000000087 stabilizing effect Effects 0.000 claims description 7
- 230000008034 disappearance Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
Abstract
The utility model provides an open-circuit monitoring one-off full-off LED control circuit which comprises a power supply circuit, a filter circuit, a switching power supply driving circuit and an overvoltage and overcurrent protection circuit, wherein the power supply circuit, the filter circuit, the switching power supply driving circuit and the overvoltage and overcurrent protection circuit are electrically connected, the LED control circuit further comprises a one-off full-off self-recovery circuit, and the one-off full-off self-recovery circuit is electrically connected with the overvoltage and overcurrent protection circuit. The utility model provides an open-circuit monitoring one-off full-on LED control circuit, which uses a switching power supply as an LED main control drive to realize LED open-circuit monitoring by matching with an analog discrete device and simultaneously supports self-recovery after fault disappearance.
Description
Technical Field
The utility model relates to the technical field of automobile accessories, in particular to an open-circuit monitoring one-off all-off LED control circuit.
Background
Along with the continuous development of the automobile market in China, the configuration is more and more abundant, the LED lamp has higher energy efficiency and longer service life, the number of LED particles for providing the optimal lighting effect is continuously increased, so that the lighting effect with more design sense and outstanding individuality is realized, and meanwhile, the energy consumption and the regulation requirement need to be comprehensively checked. So far, the automobile lamp is required to meet the requirement of N-1 regulation, the driving capability of the scheme is limited, the self-recovery cannot be realized, and the price cost is too high through the cooperation of a linear chip, a Buck+linear chip, the construction of a discrete device or the monitoring of an MCU.
Disclosure of Invention
The utility model aims to overcome the problems in the prior art and provide the open-circuit monitoring one-off all-off LED control circuit which is low in cost, can realize one-off all-off and can be recovered.
In order to achieve the technical purpose and the technical effect, the utility model is realized by the following technical scheme:
the utility model provides an open-circuit monitoring one-off full-off LED control circuit which comprises a power supply circuit, a filter circuit, a switching power supply driving circuit and an overvoltage and overcurrent protection circuit, wherein the power supply circuit, the filter circuit, the switching power supply driving circuit and the overvoltage and overcurrent protection circuit are electrically connected, the LED control circuit also comprises a one-off full-off self-recovery circuit, and the one-off full-off self-recovery circuit is electrically connected with the overvoltage and overcurrent protection circuit;
the all-off self-recovery circuit comprises a diode D2, a diode D3, a triode Q5, a triode Q6, a triode Q7, a triode Q8, a resistor R22, a resistor R27, a resistor R31, a resistor R32, a resistor R33, a resistor R34, a resistor R35 and a resistor R36, wherein the diode D2, the diode D3, the triode Q5, the triode Q6, the triode Q7, the triode Q8, the resistor R22, the resistor R27, the resistor R31, the resistor R32, the resistor R33, the resistor R34, the resistor R35 and the resistor R36 are electrically connected.
In one embodiment of the present utility model, the power supply circuit includes a capacitor C3, a capacitor C16, a voltage transformer TV1, a resistor R6, a MOS transistor Q2, a zener diode ZD1, a capacitor C1, a resistor R2, and a resistor R7, where the capacitor C3, the capacitor C16, the voltage transformer TV1, the resistor R6, the MOS transistor Q2, the zener diode ZD1, the capacitor C1, the resistor R2, and the resistor R7 are electrically connected.
In one embodiment of the present utility model, the filter circuit includes a capacitor C4, a capacitor C5, a capacitor C6, a capacitor C7, a capacitor C8, a capacitor C9, a capacitor C10, a capacitor C11, and a pole L1, where the capacitor C4, the capacitor C5, the capacitor C6, the capacitor C7, the capacitor C8, the capacitor C9, the capacitor C10, the capacitor C11, and the pole L1 are electrically connected.
In one embodiment of the present utility model, the switching power supply driving circuit includes a chip U1 and a peripheral circuit of the chip U1, where the chip U1 is electrically connected to the peripheral circuit.
In one embodiment of the present utility model, the over-voltage and over-current protection circuit includes a MOS transistor Q2, a zener diode ZD2, a resistor R4, a capacitor C2, a resistor R8, a capacitor C18, a resistor R11, a MOS transistor Q3, and a capacitor C22, where the MOS transistor Q2, the zener diode ZD2, the resistor R4, the capacitor C2, the resistor R8, the capacitor C18, the resistor R11, the MOS transistor Q3, and the capacitor C22 are electrically connected.
In one embodiment of the present utility model, the LED control circuit further includes an LED light source electrically connected to the one-to-one-off self-recovery circuit.
In summary, the utility model provides an open-circuit monitoring one-off all-on-off LED control circuit, which uses a switching power supply as an LED main control drive to realize LED open-circuit monitoring in cooperation with an analog discrete device and simultaneously supports self-recovery after failure disappears.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and together with the description serve to explain the utility model and do not constitute a limitation on the utility model. In the drawings:
FIG. 1 is a schematic view of the overall structure of the present utility model;
FIG. 2 is a schematic diagram of the power supply circuit of the present utility model;
FIG. 3 is a schematic diagram of a filter circuit according to the present utility model;
FIG. 4 is a schematic diagram of a driving circuit of a switching circuit according to the present utility model;
FIG. 5 is a schematic diagram of the structure of the over-voltage and over-current protection circuit of the present utility model;
fig. 6 is a schematic diagram of the structure of the one-off self-recovery circuit and the LED light source according to the present utility model.
The reference numerals in the figures illustrate: the LED light source comprises a 1-power supply circuit, a 2-filter circuit, a 3-switch circuit driving circuit, a 4-overvoltage and overcurrent protection circuit, a 5-one-off full-off self-recovery circuit and an LED light source.
Detailed Description
The utility model will be described in detail below with reference to the drawings in combination with embodiments.
Referring to fig. 1 and 2, the present utility model provides an LED control circuit for detecting an open circuit, which uses a switching power supply as a main LED control drive, and cooperates with an analog discrete device to detect an open circuit of an LED, and supports self-recovery after a fault disappears. Specifically, the LED control circuit includes a power supply circuit 1, where the power supply circuit 1 includes a capacitor C3, a capacitor C16, a voltage transformer TV1, a resistor R6, a MOS transistor Q2, a zener diode ZD1, a capacitor C1, a resistor R2, and a resistor R7, and the capacitor C3, the capacitor C16, the voltage transformer TV1, the resistor R6, the MOS transistor Q2, the zener diode ZD1, the capacitor C1, the resistor R2, and the resistor R7 are electrically connected. Specifically, the capacitor C3 and the capacitor C16 are connected in series and then connected with the voltage transformer TV1, the voltage transformer TV1 is connected with the resistor R6 and then connected with one end of the MOS tube, the other two ends of the MOS tube are connected with the zener diode ZD1, the zener diode ZD1 is connected with the capacitor C1, and the capacitor C1 is grounded after being connected with the resistor R2 and the resistor R7. The voltage transformer TV1, the capacitor C2 and the capacitor C16 absorb surge voltage, the MOS tube Q2 is used for preventing reverse connection, and the voltage stabilizing diode ZD1, the capacitor C1, the resistor R2 and the resistor R7 form a protection circuit to prevent overvoltage from damaging the MOS tube Q2.
Referring to fig. 1 and 3, in an embodiment of the utility model, the LED control circuit further includes a filter circuit 2, and the filter circuit 2 is electrically connected to the power supply circuit 1. The filter circuit 2 includes a capacitor C4, a capacitor C5, a capacitor C6, a capacitor C7, a capacitor C8, a capacitor C9, a capacitor C10, a capacitor C11, and an electric pole L1, and the capacitor C4, the capacitor C5, the capacitor C6, the capacitor C7, the capacitor C8, the capacitor C9, the capacitor C10, the capacitor C11, and the electric pole L1 are electrically connected. Specifically, after being connected in parallel, the capacitor C4, the capacitor C5, the capacitor C6 and the capacitor C7 are connected with one end of the inductor L1, the other end of the inductor L1 is connected with the capacitor C8, the capacitor C9, the capacitor C10 and the capacitor C11 which are connected in parallel, and two ends of the capacitor C4 are also connected with the resistor R2 and the resistor R7. The capacitor C4, the capacitor C5, the capacitor C6, the capacitor C7, the capacitor C8, the capacitor C9, the capacitor C10 and the capacitor C11 form pi filtering.
Referring to fig. 1 and 4, in an embodiment of the utility model, the LED control circuit further includes a switching power supply driving circuit 3, and the switching power supply driving circuit 3 is electrically connected to the filter circuit 2. The switching power supply driving circuit 3 includes a chip U1 and a peripheral circuit of the chip U1, and the chip U1 is electrically connected with the peripheral circuit. The model of the chip U1 may be PWMDC PGND, but is not limited thereto. The specific structure of the peripheral circuit is determined according to the model of the chip U1, and the peripheral circuit is connected with the capacitor C11.
Referring to fig. 1 and 5, in an embodiment of the present utility model, the LED control circuit further includes an over-voltage and over-current protection circuit 4, and the over-voltage and over-current protection circuit 4 is electrically connected to the switching power supply driving circuit 3. The overvoltage and overcurrent protection circuit 4 comprises a MOS tube Q2, a voltage stabilizing diode ZD2, a resistor R4, a capacitor C2, a resistor R8, a capacitor C18, a resistor R11, a MOS tube Q3 and a capacitor C22, wherein the MOS tube Q2, the voltage stabilizing diode ZD2, the resistor R4, the capacitor C2, the resistor R8, the capacitor C18, the resistor R11, the MOS tube Q3 and the capacitor C22 are electrically connected. The voltage stabilizing diode ZD2 is connected with the resistor R4, the resistor R4 is connected with the capacitor C2, the capacitor C2 is connected with two ends of the MOS tube Q1, one end of the MOS tube Q1 is connected with the capacitor C18, the MOS tube is connected with one end of the MOS tube Q3 after being connected with the resistor R8, the other end of the MOS tube is connected with the resistor R11 and the capacitor C22, and the capacitor C22 is grounded. The voltage stabilizing diode ZD2, the resistor R4 and the capacitor C2 form a protection circuit of the MOS tube Q1, the capacitor C18 is a filter capacitor, the resistor R8 and the resistor R11 are current limiting resistors of the MOS tube Q3, and the capacitor C22 is a filter capacitor of the MOS tube Q3.
Referring to fig. 1 and 6, in an embodiment of the utility model, the LED control circuit further includes a self-extinguishing recovery circuit 5, and the self-extinguishing recovery circuit 5 is electrically connected to the over-voltage and over-current protection circuit 4. The self-recovery circuit 5 for all-off state comprises a diode D2, a diode D3, a triode Q5, a triode Q6, a triode Q7, a triode Q8, a resistor R22, a resistor R27, a resistor R31, a resistor R32, a resistor R33, a resistor R34, a resistor R35 and a resistor R36, wherein the diode D2, the diode D3, the triode Q5, the triode Q6, the triode Q7, the triode Q8, the resistor R22, the resistor R27, the resistor R31, the resistor R32, the resistor R33, the resistor R34, the resistor R35 and the resistor R36 are electrically connected. Specifically, diode D2, diode D3 electric connection back is connected with triode Q5's a pin, and this pin of triode Q5 still is connected with resistance R22 back ground, and another pin of triode Q5 is connected with diode D2 after being connected with resistance R22, and another pin of triode Q5 is connected with one of them pin of triode Q6, and one of them pin of triode Q6 is connected with resistance R31, resistance R32 back ground, and one pin of triode Q7 is connected with resistance R33, resistance R34 back ground, and one pin of triode Q8 is connected with resistance R35, resistance R36 back ground, and electric connection between triode Q5, triode Q6, triode Q7, the triode Q8. In one embodiment of the present utility model, the LED control circuit further includes an LED light source electrically connected to the all-in-one self-recovery circuit. The number of LED light sources may be thirty, but is not limited thereto. In a normal operating state, the diode D3 and the diode D2 provide rated voltage values for the resistor R22 and the triode Q5. According to the diode characteristics, the voltage at two ends of the resistor R22 is about 0.7V, the resistance value of the resistor R22 is 100 omega, then the current value provided by the loop is 7mA, the base power supply current of the triode Q6, the triode Q7 and the triode Q8 is provided, because the LED driving current is larger and 150mA, the resistance values of the resistor R31, the resistor R32, the resistor R33, the resistor R34, the resistor R35 and the resistor R36 are set, the parallel connection resistance value is 13 omega, the voltage value in the single-string loop of the LED is provided by combining the current set voltage value is about 2V, and the voltage drop of BE is 0.7V when the triode Q6, the triode Q7 and the triode Q8 are started, and the base voltages of the triode Q6, the triode Q7 and the triode Q8 are required to BE greater than 2.7V when the circuit normally works. In an abnormal working state, if an LED light source is opened in the triode Q6 loop, at this time, 150mA of current cannot be provided to the resistor R31 and the resistor R32 in the loop, the maximum current provided by the diode D1, the diode D2, the resistor R22 and the triode Q5 is analyzed in the normal working state, the maximum current provided by the resistor R31 and the resistor R33 is 7mA, the resistor resistance value is 13 Ω after the resistor R31 and the resistor R33 are connected in parallel, and the voltage 13 x 0.007 = 0.1V is provided to the triode Q6, the triode Q7 and the triode Q8, which cannot meet the condition that the base voltages of the triode Q6, the triode Q7 and the triode Q8 need to be greater than 2.7V in the normal working state of the circuit, and all the LED light sources are extinguished. After the LED light source is opened, the switching power supply driving circuit monitors that the LED light source is opened, no current is output, the loop output voltage of the switching power supply driving circuit is automatically increased, if the operation is abnormal all the time, the loop of the switching power supply driving circuit is adjusted to an overvoltage protection point, and the above processes are repeated; if the LED light source is recovered from an open circuit, normal operation can be resumed.
In summary, the utility model provides an open-circuit monitoring one-off all-on-off LED control circuit, which uses a switching power supply as an LED main control drive to realize LED open-circuit monitoring in cooperation with an analog discrete device and simultaneously supports self-recovery after failure disappears.
The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims.
Claims (6)
1. The open-circuit monitoring one-off full-off LED control circuit comprises a power supply circuit, a filter circuit, a switching power supply driving circuit and an overvoltage and overcurrent protection circuit, wherein the power supply circuit, the filter circuit, the switching power supply driving circuit and the overvoltage and overcurrent protection circuit are electrically connected;
the all-off self-recovery circuit comprises a diode D2, a diode D3, a triode Q5, a triode Q6, a triode Q7, a triode Q8, a resistor R22, a resistor R27, a resistor R31, a resistor R32, a resistor R33, a resistor R34, a resistor R35 and a resistor R36, wherein the diode D2, the diode D3, the triode Q5, the triode Q6, the triode Q7, the triode Q8, the resistor R22, the resistor R27, the resistor R31, the resistor R32, the resistor R33, the resistor R34, the resistor R35 and the resistor R36 are electrically connected.
2. The LED control circuit of claim 1, wherein: the power supply circuit comprises a capacitor C3, a capacitor C16, a voltage transformer TV1, a resistor R6, a MOS tube Q2, a zener diode ZD1, a capacitor C1, a resistor R2 and a resistor R7, wherein the capacitor C3, the capacitor C16, the voltage transformer TV1, the resistor R6, the MOS tube Q2, the zener diode ZD1, the capacitor C1, the resistor R2 and the resistor R7 are electrically connected.
3. The LED control circuit of claim 1, wherein: the filter circuit comprises a capacitor C4, a capacitor C5, a capacitor C6, a capacitor C7, a capacitor C8, a capacitor C9, a capacitor C10, a capacitor C11 and an electric pole L1, wherein the capacitor C4, the capacitor C5, the capacitor C6, the capacitor C7, the capacitor C8, the capacitor C9, the capacitor C10, the capacitor C11 and the electric pole L1 are electrically connected.
4. The LED control circuit of claim 1, wherein: the switching power supply driving circuit comprises a chip U1 and a peripheral circuit of the chip U1, wherein the chip U1 is electrically connected with the peripheral circuit.
5. The LED control circuit of claim 1, wherein: the overvoltage and overcurrent protection circuit comprises a MOS tube Q2, a voltage stabilizing diode ZD2, a resistor R4, a capacitor C2, a resistor R8, a capacitor C18, a resistor R11, a MOS tube Q3 and a capacitor C22, wherein the MOS tube Q2, the voltage stabilizing diode ZD2, the resistor R4, the capacitor C2, the resistor R8, the capacitor C18, the resistor R11, the MOS tube Q3 and the capacitor C22 are electrically connected.
6. The LED control circuit of claim 1, wherein: the LED control circuit further comprises an LED light source, and the LED light source is electrically connected with the one-off all-off self-recovery circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322168513.0U CN220511290U (en) | 2023-08-14 | 2023-08-14 | Open-circuit monitoring one-off all-off LED control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322168513.0U CN220511290U (en) | 2023-08-14 | 2023-08-14 | Open-circuit monitoring one-off all-off LED control circuit |
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| Publication Number | Publication Date |
|---|---|
| CN220511290U true CN220511290U (en) | 2024-02-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322168513.0U Active CN220511290U (en) | 2023-08-14 | 2023-08-14 | Open-circuit monitoring one-off all-off LED control circuit |
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| Country | Link |
|---|---|
| CN (1) | CN220511290U (en) |
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2023
- 2023-08-14 CN CN202322168513.0U patent/CN220511290U/en active Active
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