High-voltage misconnection protection circuit, PCB and lighting device

Abstract

The utility model discloses a high-voltage misconnection protection circuit, PCB and lighting device, the high-voltage misconnection protection circuit comprises a communication unit and an analysis unit, the communication unit comprises a high-voltage protection part and a second control chip U2, the input end of the high-voltage protection part is used for connecting a power supply end, and the output end of the high-voltage protection part is used for connecting a power supply end. The output end of the high-voltage protection part is respectively connected with a pin 6 and a pin 7 of the second control chip U2; a pin 1 and a pin 4 of the second control chip U2 are respectively connected with the input end of the analysis unit, and the output end of the analysis unit is used for being connected with a lighting circuit of the lighting device; according to the high-voltage misconnection protection circuit disclosed by the invention, when the input end of the communication unit is misconnected with the high-voltage live wire due to misoperation of an operator, the high-voltage protection part can automatically cut off the electric connection relation between the power supply end and the communication unit, so that the problem of damage to the communication unit and the analysis unit is avoided; the stability and the safety of the lighting device during working are improved, and the maintenance cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to high pressure protection technical field especially relates to a high pressure wrong connection protection circuit, PCB board and lighting device. BACKGROUND

[0002] In the process of carrying out the lamp installation construction in the project site, the construction personnel when carrying out the wiring operation, possibly due to the operation error, signal line is connected to the AC220V power supply wrongly;This error will cause the signal port of all lamps on the whole signal loop to be damaged;Due to the damage of the signal port, the lamp cannot normally receive and transmit signals, thereby leading to the failure of the whole system;This accident not only affects the progress of the project, but also brings huge economic loss and additional maintenance cost to the project.

[0003] It can be seen that the prior art still needs to be improved and improved. UTILITY MODEL CONTENT

[0004] In view of the above shortcomings of the prior art, the purpose of the utility model is to provide a high voltage wrong joint protection circuit, which can realize timely cut-off of the circuit when high voltage misconnection occurs, and improve the safety degree of the lighting device during work.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A high voltage wrong connection protection circuit, comprising a communication unit and an analysis unit, the communication unit comprises a high voltage protection part and a second control chip U2, the input end of the high voltage protection part is used for connecting the power supply end, the output end of the high voltage protection part is connected with the pin 6 and the pin 7 of the second control chip U2 respectively;The pin 1 and the pin 4 of the second control chip U2 are connected with the input end of the analysis unit respectively, and the output end of the analysis unit is used for connecting the lighting circuit of the lighting device.

[0007] The high voltage wrong connection protection circuit, the communication unit further comprises a first voltage dividing part and a second voltage dividing part, the output end of the high voltage protection part is connected with the pin 6 of the second control chip U2 through the first voltage dividing part, and the output end of the high voltage protection part is connected with the pin 7 of the second control chip U2 through the second voltage dividing part.

[0008] The high voltage wrong connection protection circuit, the high voltage protection part comprises a surge protector and a self-recovery fuse tube, one end of the self-recovery fuse tube is used for connecting the positive pole of the power supply end, the other end of the self-recovery fuse tube is connected with one end of the surge protector and one end of the first voltage dividing part respectively, the other end of the surge protector is connected with one end of the second voltage dividing part, and is used for connecting the negative pole of the power supply end.

[0009] The high-voltage wrong connection protection circuit, wherein the first voltage dividing part comprises a first resistor R1 and a second resistor R2, and the second voltage dividing part comprises a fourth resistor R4 and a fifth resistor R5; one end of the self-restoring fuse is connected with one end of the second resistor R2, and one end of the second resistor R2 and the other end of the first resistor R1 are connected with pin 6 of the second control chip U2, and one end of the first resistor R1 is used for connecting a direct current power supply end; the other end of the surge protector is connected with one end of the fourth resistor R4, the other end of the fourth resistor R4 is connected with one end of the fifth resistor R5 and pin 7 of the second control chip U2 respectively, and the other end of the fifth resistor R5 is grounded.

[0010] The high-voltage wrong connection protection circuit, wherein the communication unit further comprises a first filter part, and pin 8 of the second control chip U2 is connected with the direct current power supply end through the first filter part.

[0011] The high-voltage wrong connection protection circuit, wherein the analysis unit comprises a first control chip U1, pin 2 and pin 3 of the first control chip U1 are connected with pin 4 and pin 1 of the second control chip U2 respectively, and a PWM pin of the first control chip U1 is used for connecting a lighting circuit of a lighting device.

[0012] The high-voltage wrong connection protection circuit, wherein the first control chip U1 is GL-DMX01, and the second control chip U2 is UN3088E.

[0013] The high-voltage wrong connection protection circuit, wherein the analysis unit further comprises a second filter part, and pin 9 of the first control chip U1 is connected with the direct current power supply end through the second filter part.

[0014] The utility model also correspondingly provides a PCB board, the PCB board is printed with the high-voltage wrong connection protection circuit of any one described above.

[0015] The utility model also correspondingly provides a lighting device, the lighting device is provided with a PCB board, the PCB board is printed with a lighting circuit and the high-voltage wrong connection protection circuit of any one described above, and the high-voltage wrong connection protection circuit is electrically connected with the lighting circuit.

[0016] Beneficial effects:

[0017] The utility model provides a kind of high-voltage misconnection protection circuit, the input end of communication unit is designed with high-voltage protection part, when the input end of communication unit is due to improper operation of operator, for example, misconnect high-voltage live wire, high-voltage protection part will automatically detect abnormal voltage, and immediately take measures, cut off the electrical connection between power supply end and communication unit, ensure that in the case of such misconnection, communication unit and the analysis unit connected therewith are not damaged, improve the stability and security of lighting device when operating;Further, in addition, due to the existence of high-voltage protection part, reduce the maintenance and maintenance work caused by equipment damage, thereby effectively reduce the overall maintenance cost. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The utility model provides the circuit structure diagram of communication unit;

[0019] Figure 2 The utility model provides the circuit structure diagram of analysis unit.

[0020] Main component symbol explanation: 11-high-voltage protection part, 12-first voltage division part, 13-second voltage division part, 14-first filter part, 21-second filter part. DETAILED DESCRIPTION

[0021] The utility model provides a kind of high-voltage misconnection protection circuit, PCB board and lighting device, to make the purpose, technical scheme and effect of the utility model more clear, definite, the following referring to drawing and taking example to the utility model is further detailed.

[0022] In the description of the utility model, it needs to be understood that the terms "mounting", "connection" and the like should be broadly understood, and the above-mentioned terms in the utility model can be understood according to specific circumstances by the person skilled in the art.

[0023] Please refer to Figure 1 And Figure 2 The utility model provides a kind of high-voltage misconnection protection circuit, including communication unit and analysis unit, the communication unit includes high-voltage protection part 11 and second control chip U2, the input end of high-voltage protection part 11 is used to connect power supply end, the output of high-voltage protection part 11 is connected with the pin 6 and pin 7 of second control chip U2 respectively;Pin 1 and pin 4 of second control chip U2 are connected with the input end of analysis unit respectively, and the output of analysis unit is used to connect the lighting circuit of lighting device.

[0024] The application discloses a high-voltage wrong connection protection circuit, wherein an input end of a communication unit is provided with a high-voltage protection part 11; when the input end of the communication unit is connected to a high-voltage live wire due to improper operation of an operator, the high-voltage protection part 11 can automatically detect abnormal voltage and immediately take measures to cut off the electrical connection between a power supply end and the communication unit, so that the communication unit and an analysis unit connected to the communication unit are not damaged in the case of such wrong connection, and the stability and safety of the lighting device during operation are improved; further, due to the existence of the high-voltage protection part 11, the maintenance and repair work caused by equipment damage is reduced, so that the overall maintenance cost is effectively reduced.

[0025] In the embodiment, the communication unit realizes communication based on a DMX512 protocol, and when a wrong connection problem occurs, the voltage input from the power supply end to the communication unit is an alternating current 220V voltage.

[0026] Further, referring to Figure 1 , the communication unit further comprises a first voltage dividing part 12 and a second voltage dividing part 13, an output end of the high-voltage protection part 11 is connected to a pin 6 of a second control chip U2 through the first voltage dividing part 12, and an output end of the high-voltage protection part 11 is connected to a pin 7 of the second control chip U2 through the second voltage dividing part 13.

[0027] In the embodiment, the first voltage dividing part 12 and the second voltage dividing part 13 in the communication unit are used to reduce the high-voltage signal from the output end of the high-voltage protection part 11 to a safe voltage level, so that the second control chip U2 can normally work in a safe voltage range, potential damage to the second control chip U2 caused by excessively high voltage is effectively prevented, the risk of failure caused by voltage fluctuation or abnormality is reduced, the service life of the second control chip U2 is prolonged, and the reliability of the whole communication unit during work is improved.

[0028] Further, referring to Figure 1 , the high-voltage protection part 11 comprises a surge protector and a self-recovery fuse, one end of the self-recovery fuse is used for connecting a positive pole of the power supply end, the other end of the self-recovery fuse is connected with one end of the surge protector and one end of the first voltage dividing part 12 respectively, the other end of the surge protector is connected with one end of the second voltage dividing part 13 and used for connecting a negative pole of the power supply end.

[0029] In the embodiment, the model of the surge protector TVS is P0080SC, and the model of the self-recovery fuse F1 is UN250-120.

[0030] In the embodiment, when the input end of the communication unit is connected to the high-voltage firewire, i.e. the pin 6 and the pin 7 of the second control chip U2 are connected to the high-voltage firewire, the overvoltage will trigger the surge protector TVS protection, at this time, the surge protector TVS is turned on instantaneously, a large current is generated, the impedance of the self-recovery fuse tube F1 is increased, the circuit is automatically cut off, i.e. the connection between the power supply end and the communication unit is cut off; at this time, the voltage of the power supply end is applied to the two ends of the self-recovery fuse tube F1, thereby effectively protecting the rear-end circuit from being damaged.

[0031] Further, referring to Figure 1 , the first voltage dividing part 12 comprises a first resistor R1 and a second resistor R2, the second voltage dividing part 13 comprises a fourth resistor R4 and a fifth resistor R5; the other end of the self-recovery fuse tube and one end of the surge protector are respectively connected to one end of the second resistor R2, one end of the second resistor R2 and the other end of the first resistor R1 are respectively connected to the pin 6 of the second control chip U2, one end of the first resistor R1 is used for connecting the DC power supply end; the other end of the surge protector is connected to one end of the fourth resistor R4, the other end of the fourth resistor R4 is respectively connected to one end of the fifth resistor R5 and the pin 7 of the second control chip U2, the other end of the fifth resistor R5 is grounded.

[0032] Further, referring to Figure 1 , the communication unit further comprises a first filter part 14, the pin 8 of the second control chip U2 is connected to the DC power supply end through the first filter part 14.

[0033] In the embodiment, by arranging the first filter part 14, when the external voltage fluctuates or other potential electrical interference occurs, the first filter part 14 can effectively absorb and filter out the adverse factors, thereby avoiding the damage to the second control chip U2, ensuring that the second control chip U2 can operate in a more stable and safe environment, prolonging its service life, and reducing the maintenance cost.

[0034] In the embodiment, the first filter part 14 comprises a fourth capacitor C4, one end of the fourth capacitor C4 is respectively connected to the pin 8 of the second control chip U2 and the DC power supply end, the DC power supply end provides a 5V DC working voltage, the other end of the fourth capacitor C4 is grounded.

[0035] Further, referring to Figure 1 and Figure 2 , the analysis unit comprises a first control chip U1, the pin 2 and the pin 3 of the first control chip U1 are respectively connected to the pin 4 and the pin 1 of the second control chip U2; the PWM pin of the first control chip U1 is used for connecting the lighting circuit of the lighting device.

[0036] In the embodiment, the pin 13-pin 17 and the pin 10 of the first control chip U1 are PWM pins, which are used to output PWM signals to adjust the working state of the lighting circuit.

[0037] Further, the model of the first control chip U1 is GL-DMX01, and the model of the second control chip U2 is UN3088E.

[0038] Further, referring to Figure 2 , the analysis unit further comprises a second filter part 21, and the pin 9 of the first control chip U1 is connected with the DC power supply end through the second filter part 21.

[0039] In the embodiment, by arranging the second filter part 21, when the external voltage fluctuates or other potential electrical interference occurs, the second filter part 21 can effectively absorb and filter out the adverse factors, thereby avoiding the damage to the first control chip U1, ensuring that the first control chip U1 can run in a more stable and safe environment, prolonging its service life, and reducing the maintenance cost.

[0040] In the embodiment, the second filter part 21 comprises a third capacitor C3, one end of the third capacitor C3 is connected with the pin 9 of the first control chip U1 and the DC power supply end respectively, the DC power supply end provides a 5V DC working voltage, and the other end of the third capacitor C3 is grounded.

[0041] The utility model also correspondingly provides a PCB board, the PCB board is printed with the high pressure wrong connection protection circuit of any one described above.

[0042] The utility model also correspondingly provides a lighting device, the lighting device is provided with the PCB board, the PCB board is printed with the lighting circuit and the high pressure wrong connection protection circuit of any one described above, and the high pressure wrong connection protection circuit is electrically connected with the lighting circuit.

[0043] It can be understood that, for those skilled in the art, according to the technical scheme and the utility model concept of the utility model, equivalent replacement or change can be made, and all these changes or replacements should belong to the protection scope of the utility model.

Claims

1. A high voltage misfeed protection circuit, characterized by, The communication unit comprises a high-voltage protection part and a second control chip U2, an input end of the high-voltage protection part is used for connecting a power supply end, and output ends of the high-voltage protection part are connected with pin 6 and pin 7 of the second control chip U2 respectively; pin 1 and pin 4 of the second control chip U2 are connected with input ends of the analysis unit respectively, and an output end of the analysis unit is used for connecting a lighting circuit of a lighting device.

2. The high-voltage cross-connection protection circuit according to claim 1, characterized in that, The communication unit further comprises a first voltage dividing part and a second voltage dividing part, the output end of the high-voltage protection part is connected with pin 6 of the second control chip U2 through the first voltage dividing part, and the output end of the high-voltage protection part is connected with pin 7 of the second control chip U2 through the second voltage dividing part.

3. A high voltage misfeed protection circuit according to claim 2, wherein, The high-voltage protection part comprises a surge protector and a self-recovery fuse tube, one end of the self-recovery fuse tube is used for connecting a positive pole of the power supply end, the other end of the self-recovery fuse tube is connected with one end of the surge protector and one end of the first voltage dividing part respectively, and the other end of the surge protector is connected with one end of the second voltage dividing part and used for connecting a negative pole of the power supply end.

4. The high voltage misconnection protection circuit of claim 3, wherein, The first voltage dividing part comprises a first resistor R1 and a second resistor R2, the second voltage dividing part comprises a fourth resistor R4 and a fifth resistor R5; the other end of the self-recovery fuse tube and one end of the surge protector are connected with one end of the second resistor R2 respectively, one end of the second resistor R2 and the other end of the first resistor R1 are connected with pin 6 of the second control chip U2 respectively, and one end of the first resistor R1 is used for connecting a direct current power supply end; the other end of the surge protector is connected with one end of the fourth resistor R4, the other end of the fourth resistor R4 is connected with one end of the fifth resistor R5 and pin 7 of the second control chip U2 respectively, and the other end of the fifth resistor R5 is grounded.

5. The high voltage misfeed protection circuit of claim 1, wherein, The communication unit further comprises a first filter part, pin 8 of the second control chip U2 is connected with the direct current power supply end through the first filter part.

6. The high voltage misfeed protection circuit of claim 1, wherein, The analysis unit comprises a first control chip U1, pin 2 and pin 3 of the first control chip U1 are connected with pin 4 and pin 1 of the second control chip U2 respectively; a PWM pin of the first control chip U1 is used for connecting the lighting circuit of the lighting device.

7. A high voltage misfeed protection circuit according to claim 6, wherein, The model of the first control chip U1 is GL-DMX01, and the model of the second control chip U2 is UN3088E.

8. The high voltage misfeed protection circuit of claim 6, wherein, The analysis unit further comprises a second filter part, pin 9 of the first control chip U1 is connected with the direct current power supply end through the second filter part.

9. A PCB board characterized by, The PCB board is printed with the high-voltage wrong connection protection circuit as claimed in any one of claims 1-8.

10. An illumination device, characterized by The lighting device is provided with a PCB board, the PCB board is printed with a lighting circuit and the high-voltage wrong connection protection circuit as claimed in any one of claims 1-8, and the high-voltage wrong connection protection circuit is electrically connected with the lighting circuit.

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