A LED lamp controller with protection

Abstract

The utility model provides a LED lamp controller with protection, comprising a control module, a plurality of overcurrent detection modules and a driving module which are arranged in a one-to-one correspondence, wherein the overcurrent detection module is connected to the control module and the driving module, and the driving module is provided with a power supply end for connecting to an LED light source; when in use, the power supply end of each driving module is connected to an LED light source to supply power to the LED light source, and when supplying power, the current from each driving module to the LED light source is detected by the overcurrent detection module, and when a current detection module detects that the current is too large, the overcurrent signal is transmitted to the control module, and the control module can control each driving module to cut off the circuit, so that the driving circuit of the driving module stops outputting, thereby achieving the purpose of protection, and can effectively avoid the burning of the entire controller due to a single-circuit fault.

Description

Technical Field

[0001] The utility model generally relates to the technical field of controllers, and in particular to a LED lamp controller with protection. Background Art

[0002] Light controllers are widely used in rail transit on-board dynamic maps, professional sandbox model control such as power distribution, building lighting display, home lighting engineering and other application scenarios. The technologies involved include LED lights, drive circuits and MOS tube overcurrent protection. LED lights are connected to the controller through light strips, and the light strips are powered by the controller. Some LED lights include multiple light strips arranged in parallel, and multiple light strips are powered by one controller. This setting method will cause the entire control to burn out when an overcurrent occurs in a single light strip, making the entire LED light source unable to emit light, and expanding the scope of the fault. During construction and use, as long as one LED light fails, the drive circuit will burn out, and then the entire controller will fail, making the whole unable to work normally. It usually needs to be returned to the factory for repair or replaced with a new controller to repair the fault. This situation results in a very bad user experience and increases after-sales and maintenance costs. Utility Model Content

[0003] In order to solve at least part of the above problems, the present application provides a LED lamp controller with protection.

[0004] The utility model provides a LED lamp controller with protection, comprising a control module, a plurality of overcurrent detection modules and a driving module arranged in a one-to-one correspondence, wherein the overcurrent detection module is connected to both the control module and the driving module, and the driving module is provided with a power supply terminal for connecting to an LED light source.

[0005] Specifically, when in use, the power supply end of each driver module is connected to an LED light source to power the LED light source. When power is supplied, the current attacking the LED light source from each driver module is detected through the overcurrent detection module. When a current detection module detects that the current is too large, it will transmit the overcurrent signal to the control module. The control module can control each driver module to cut off the circuit, so that the driver module drive circuit stops outputting, thereby achieving the purpose of protection, and can effectively avoid the burning of the entire controller due to a single-circuit fault.

[0006] Furthermore, the control module is a microprocessor, and the model of the microprocessor is STM32F103RCT6.

[0007] Further, the overcurrent detection module includes an overcurrent detection circuit, which includes a first resistor and a second resistor connected to the driving module and arranged in parallel, the other end of the first resistor is grounded, the other end of the second resistor is connected to a first capacitor, the other end of the first capacitor is grounded, and also includes a first transistor, the base of the first transistor is connected between the first capacitor and the second resistor, the emitter of the first transistor is grounded, and the collector of the first transistor is electrically connected to the control module.

[0008] Furthermore, the driving module includes a MOS driving circuit, the MOS driving circuit includes a field effect transistor, and the model of the field effect transistor is HY1103S, AO3400, etc.

[0009] Furthermore, the source of the field effect tube is electrically connected to the control module, and the gate is electrically connected to the first resistor and the second resistor.

[0010] Furthermore, a body diode is provided between the gate and the drain of the field effect tube, the anode of the body diode is connected to the gate of the field effect tube, and the cathode of the body diode is connected to the drain of the field effect tube.

[0011] Furthermore, the control module is connected to an LED status indication circuit.

[0012] Furthermore, the control module is also connected to a button.

[0013] Beneficial effects:

[0014] The utility model provides a LED lamp controller with protection, comprising a control module, a plurality of overcurrent detection modules and a driving module which are arranged in a one-to-one correspondence, wherein the overcurrent detection module is connected to the control module and the driving module, and the driving module is provided with a power supply end for connecting to an LED light source; when in use, the power supply end of each driving module is connected to an LED light source to supply power to the LED light source, and when supplying power, the current attacking the LED light source from each driving module is detected by the overcurrent detection module, and when a current detection module detects that the current is too large, the overcurrent signal is transmitted to the control module, and the control module can control each driving module to cut off the circuit, so that the driving circuit of the driving module stops outputting, thereby achieving the purpose of protection, and can effectively avoid the burning of the entire controller due to a single-circuit fault. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Other features, objects and advantages of the present application will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings.

[0016] Figure 1This is a structural schematic diagram of a LED lamp controller with protection provided by the utility model.

[0017] Figure 2 This is a circuit block diagram of a LED lamp controller with protection provided by the utility model.

[0018] Figure 3 The utility model provides a circuit diagram of a MOS output circuit and an overcurrent detection circuit in a protected LED lamp controller.

[0019] Figure 4 The utility model provides a MCU circuit diagram in a LED lamp controller with protection.

[0020] Figure 5 The utility model provides a circuit diagram of a power output interface of a LED lamp controller with protection.

[0021] Figure 6 The utility model provides a circuit diagram of an LED state indicating circuit in a LED lamp controller with protection.

[0022] Figure 7 A key circuit diagram of a LED lamp controller with protection provided by the utility model. DETAILED DESCRIPTION

[0023] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant utility model, rather than to limit the utility model. It is also necessary to explain that, for ease of description, only the parts related to the utility model are shown in the accompanying drawings.

[0024] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0025] The utility model provides a LED lamp controller with protection, as a specific implementation method, refer to Figure 1-Figure 7 The controller includes a control module 3, a plurality of overcurrent detection modules 1 and a driving module 2 which are arranged in a one-to-one correspondence. The overcurrent detection module 1 is connected to both the control module 3 and the driving module 2. The driving module 2 is provided with a power supply terminal for connecting to an LED light source.

[0026] Specifically, refer to Figure 1-Figure 3The control module 3 adopts an MCU control module. When in use, the power supply end of each driver module 2 is connected to an LED light source, wherein the LED light source can be a single light bead or an LED light strip. The driver module 2 supplies power to the LED light source. When supplying power, the current supplied to the LED light source by each driver module 2 is detected by the overcurrent detection module 1. When a current detection module detects that the current is too large, it will transmit the overcurrent signal to the control module 3. The control module 3 can control each driver module to cut off the circuit, so that the driver module 2 drive circuit stops outputting, thereby achieving the purpose of protection, and can effectively avoid the burning of the entire controller due to a single-circuit fault. The specific structure of the driver module 2 and the overcurrent detection module is referred to below.

[0027] Further, as a specific implementation, the control module 3 is a microprocessor of the type STM32F103RCT6; Figure 3 , is the circuit diagram of the STM32F103RCT6 microprocessor, which has an efficient instruction set and a high clock frequency, and can be used to handle complex computing tasks, ensuring that it can efficiently and quickly process overcurrent signals when they are detected. Of course, other types of microprocessors can also be used as the main controller to implement various functions.

[0028] Further, as a specific implementation method, refer to Figure 1 The overcurrent detection module 1 includes an overcurrent detection circuit, which includes a first resistor and a second resistor connected to the driving module 2 and arranged in parallel, the other end of the first resistor is grounded, the other end of the second resistor is connected to a first capacitor, the other end of the first capacitor is grounded, and also includes a first transistor, the base of the first transistor is connected between the first capacitor and the second resistor, the emitter of the first transistor is grounded, and the collector of the first transistor is electrically connected to the control module 3.

[0029] As a specific implementation method, refer to Figure 3The circuit diagram includes multiple driving modules 2 and multiple overcurrent detection modules 1. Taking a driving module and an overcurrent detection module on the left side of the circuit diagram as an example, the driving module includes a MOS driving circuit, the overcurrent detection module includes an overcurrent detection circuit electrically connected to the MOS driving circuit, and the overcurrent detection circuit includes a first resistor R98 and a second resistor R71 connected to the MOS driving circuit and arranged in parallel, the other end of the first resistor R98 is grounded, the other end of the second resistor R71 is connected to a first capacitor C25, the other end of the first capacitor C25 is grounded, and the first transistor Q25 is also included. The base of 25 is connected between the first capacitor C25 and the second resistor R17, the emitter of the first transistor Q25 is grounded, and the collector of the first transistor Q25 is electrically connected to the control module 3, wherein the MOS driving circuit includes a field effect transistor HY1103S, whose gate is connected to the first resistor R98 and the second resistor R71, and when working, the drain of the field effect transistor supplies power to the LED light source, wherein the first resistor R18 is a current sampling resistor, and the current detection of the MOS tube is realized through the current sampling resistor R98, and the hardware overcurrent detection and identification of the current is realized through R71, C25, and Q45. As a specific implementation method: wherein the resistance value of the current sampling resistor is related to the maximum overcurrent value and the sampling resistor power, when the overcurrent is set to 6A, the sampling resistor value can be set to the transistor Vbe conduction voltage 0.6V / 6A=0.1R. The resistor R71 is set to 1K, and R71 and C25 form an RC filter circuit to reduce the current peak impact and delay the overcurrent response speed. In this example, the resistance value of the current sampling resistor R98 is 0.1R, and the resistance value of the second resistor R71 is 1K.

[0030] Further, as a specific implementation method, refer to Figure 3 , the driving module 2 includes a MOS driving circuit, and the MOS driving circuit includes a field effect tube of model HY1103S, wherein the HY1103S field effect tube has high efficiency, high stability and high safety, thereby ensuring the overall performance of the entire controller. The field effect tube can also be Q13, or a MOS tube of model AO3400 can be used. The maximum voltage and maximum current parameters of different types of MOS tubes are different, and different models are welded according to different production requirements. In the same circuit design, compatible design of multiple models is conducive to mass production of products, reducing inventory, and avoiding repeated design of PCB versions.

[0031] Further, as a specific implementation method, refer to Figure 3, and taking the distance between the driver module and the overcurrent detection module on the left side of the figure as an example, the gate and drain of the field effect tube HY1103S are connected to the body diode of the MOS tube, the anode of the body diode is connected to the gate of the field effect tube, and the cathode of the body diode is connected to the drain of the field effect tube. Specifically, in some occasions, static electricity may accumulate between the gate and drain of the field effect tube, causing abnormal operation or damage of the field effect tube. The body diode can shunt the accumulated charge to the ground, thereby protecting the field effect tube. In addition, in some circuits, due to the failure of other components or improper circuit design, reverse current may also affect the stability of the entire circuit.

[0032] Furthermore, the control module 3 is connected to an LED status indication circuit.

[0033] Specifically, refer to Figure 4 , which is a circuit diagram of an LED status indication circuit. Through the LED status indication circuit, the user can be provided with information on the circuit operation status, helping the user to understand the working condition of the circuit and to discover and solve problems in a timely manner.

[0034] Furthermore, the control module 3 is also connected to a button.

[0035] Specifically, refer to Figure 6 , which is a circuit diagram of a key. By setting the key, commands such as switch, control, and input can be implemented.

[0036] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the utility model involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the concept of the utility model. For example, the above features are replaced with the technical features with similar functions disclosed in the present application (but not limited to) by each other to form a technical solution.

Claims

1. A LED lamp controller with protection, characterized in that: It comprises a control module (3), a plurality of overcurrent detection modules (1) and a drive module (2) arranged in a one-to-one correspondence, wherein the overcurrent detection module (1) is connected to both the control module (3) and the drive module (2), and the drive module (2) is provided with a power supply terminal for connecting to an LED light source.

2. A LED lamp controller with protection according to claim 1, characterized in that: The control module (3) is a microprocessor.

3. A LED lamp controller with protection according to claim 2, characterized in that: The overcurrent detection module (1) comprises an overcurrent detection circuit, the overcurrent detection circuit comprising a first resistor and a second resistor connected to the drive module (2) and arranged in parallel, the other end of the first resistor being grounded, the other end of the second resistor being connected to a first capacitor, the other end of the first capacitor being grounded, and further comprising a first transistor, the base of the first transistor being connected between the first capacitor and the second resistor, the emitter of the first transistor being grounded, and the collector of the first transistor being electrically connected to the control module (3).

4. A LED lamp controller with protection according to claim 3, characterized in that: The driving module (2) comprises a MOS driving circuit, and the MOS driving circuit comprises a field effect transistor.

5. A LED lamp controller with protection according to claim 4, characterized in that: The source of the field effect tube is electrically connected to the control module (3), and the gate is electrically connected to the first resistor and the second resistor.

6. A LED lamp controller with protection according to claim 5, characterized in that: A diode is arranged between the gate and the drain of the field effect tube, the anode of the diode is connected to the gate of the field effect tube, and the cathode of the diode is connected to the drain of the field effect tube.

7. A LED lamp controller with protection according to claim 6, characterized in that: The control module (3) is connected to an LED status indication circuit.

8. The LED lamp controller with protection according to claim 1, characterized in that: The control module (3) is also connected to a button.

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