Flasher with built-in LED lamp constant voltage source

Abstract

The utility model relates to the technical field of motorcycle lamp control, and discloses a flasher with a built-in LED lamp constant voltage source, which comprises a constant voltage control module, an MOS (Metal Oxide Semiconductor) control module, an MCU (Microprogrammed Control Unit) controller, an integrated high-side driver and a switch, the constant voltage control module is used for stabilizing and filtering an input voltage, and the MOS control module is used for controlling the on / off of a power switch. The LED lamp has the advantages that the LED lamp has the built-in constant voltage source function, stable voltage output can be provided, it is ensured that the LED lamp can obtain stable voltage input under different power supply conditions, unstable brightness or lamp damage caused by voltage fluctuation is avoided, the heat effect generated by too large or too small current of the LED lamp is reduced through constant voltage source control, and the service life of the LED lamp is prolonged. Therefore, the service life of the lamp is prolonged, the circuit design is optimized to reduce energy consumption, the energy utilization efficiency is improved, the requirements of energy conservation and environmental protection are met, the number of external components is reduced due to the integrated design, and the cost and complexity of later maintenance are reduced.

Description

Technical Field

[0001] This utility model relates to the field of motorcycle lighting control technology, and in particular to a flasher with a built-in LED constant voltage source. Background Technology

[0002] With the development of LED lighting technology, LED lamps are gradually replacing traditional light sources due to their advantages such as high efficiency, energy saving, and environmental friendliness. However, LED lamps have high power requirements, needing stable voltage and current to ensure normal operation. Traditional flashers typically use external power supplies, which not only increases the complexity of the system but also makes them susceptible to external influences, leading to unstable flashing or damage to the LED lamps and affecting their lifespan. Existing constant voltage source flasher technology for LED lamps has made some progress, but it still has shortcomings in efficiency, reliability, and flexibility. Traditional flasher solutions often lead to a decrease in power efficiency when implementing flashing functions, especially at high frequencies, where power loss is significant. Therefore, developing a high-efficiency, reliable, and flexible built-in constant voltage source flasher for LED lamps is of significant practical importance.

[0003] Existing flashers typically lack a built-in constant voltage source, failing to provide a stable output voltage, which leads to a decline in the performance of LED lights. LED lights are known for their high performance and long lifespan, but they have high requirements for the driver power supply. Voltage fluctuations or unstable current can cause LEDs to overheat, have uneven brightness, or even be damaged.

[0004] Current similar implementations typically consist of a separate constant voltage module and an external flasher. The constant voltage source is responsible for providing a stable voltage to the LED lamp, while the flasher controls the flashing frequency and mode of the LED through an external signal. This solution has high maintenance costs, the two separate modules increase the number of failure points, and the efficiency is low due to additional energy loss.

[0005] The present invention aims to overcome the shortcomings of the existing solutions and provide an integrated module that combines a constant voltage source and flash control functions. This not only simplifies installation and maintenance but also improves the stability and reliability of the system, while meeting the diverse needs of different application scenarios. Summary of the Invention

[0006] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0007] In view of the above-mentioned problems in the prior art, this utility model is proposed.

[0008] The purpose of this invention is to provide a flash unit with a built-in constant voltage source for LED lights, which aims to solve the problem that traditional flash units do not have a built-in constant voltage source.

[0009] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a flasher with a built-in LED lamp constant voltage source, which includes a constant voltage control module, a MOS control module, an MCU controller, an integrated high-side driver, and a switch; the constant voltage control module is used to stabilize and filter the input voltage, and the MOS control module is used to control the opening and closing of the power switch.

[0010] As a preferred embodiment of the flasher with a built-in LED lamp constant voltage source of this utility model, the MCU controller is connected to an LDO chip, the constant voltage control module is connected to the LDO chip, and the switch includes a left / right switch, an alarm switch, and a power switch.

[0011] As a preferred embodiment of the flasher with a built-in LED lamp constant voltage source of this utility model, the constant voltage control module includes a power management chip and a DC-DC step-down circuit, wherein the power management chip is model CX8835.

[0012] As a preferred embodiment of the flasher with a built-in LED lamp constant voltage source of this utility model, the DC-DC step-down circuit includes resistors R47 and R48 connected in parallel with capacitor C24, and resistor R47 is connected to inductor L1.

[0013] As a preferred embodiment of the flasher with a built-in constant voltage source for LED lamps in this utility model, wherein: resistor R48 is connected to resistors R42 and R41, resistor R41 is grounded, and resistor R42 is connected to the VFB pin of the power management chip.

[0014] As a preferred embodiment of the flasher with a built-in constant voltage source for LED lamps in this utility model, the inductor L1 is connected to the SW pin of the power management chip, and the resistor R48 is connected to the CSP and CSN pins of the power management chip.

[0015] As a preferred embodiment of the flash unit with built-in LED lamp constant voltage source of this utility model, the MOS control module includes a Darlington transistor, a resistor R13 connected to the Darlington transistor, a resistor R14, a diode Z1, and a P-channel MOS transistor.

[0016] As a preferred embodiment of the flash unit with a built-in LED lamp constant voltage source of this utility model, the Darlington tube is model ULN2003A and the P-channel MOS tube is model CMSC3007.

[0017] As a preferred embodiment of the flasher with a built-in constant voltage source for LED lamps in this utility model, the Darlington transistor includes input pins IN1~IN7 and output pins OUT1~OUT7, and the input pin IN4 is a MOS control pin.

[0018] The beneficial effects of the built-in constant voltage source flasher for LED lamps of this utility model are as follows: This utility model has a built-in constant voltage source function, which can provide a stable voltage output, ensuring that the LED lamps can obtain a stable voltage input under different power supply conditions, avoiding unstable brightness or lamp damage due to voltage fluctuations. Through constant voltage source control, the heat effect caused by excessive or insufficient current in the LED lamps is reduced, thereby extending the lamps' service life. The circuit design is optimized to reduce energy consumption and improve energy utilization efficiency, meeting the requirements of energy conservation and environmental protection. The integrated design reduces the number of external components, reducing the cost and complexity of later maintenance. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0020] Figure 1 This is an overall block diagram of the flasher with a built-in LED lamp constant voltage source in this utility model.

[0021] Figure 2 This is a circuit diagram of the constant voltage control module of the flasher with a built-in LED lamp constant voltage source in this utility model.

[0022] Figure 3 This is a schematic diagram of the MOS control module circuit of the flasher with a built-in LED lamp constant voltage source in this utility model. Detailed Implementation

[0023] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0024] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0025] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0026] This utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, deviating from the general scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In actual manufacturing, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0027] Furthermore, in the description of this utility model, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used solely for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," or "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] Unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" in this utility model should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integrated connections; similarly, they can refer to mechanical connections, electrical connections, or direct connections, or indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] Reference Figures 1-3 This is the first embodiment of the present invention. This embodiment provides a flasher with a built-in LED lamp constant voltage source. The lamp can be operated by the user to realize different flashing controls according to actual needs. It is a flashing device used to indicate changes in the direction of travel of a motorcycle. It includes a constant voltage control module, a MOS control module, an MCU controller, an integrated high-side driver, and a switch. The constant voltage control module is used to stabilize and filter the input voltage, and the MOS control module is used to control the opening and closing of the power switch.

[0030] It should be noted that this invention solves the problem that traditional flashers do not have a built-in constant voltage source. This flasher integrates a constant voltage source and a flash control circuit, which can provide a stable operating voltage for LED lights.

[0031] Preferably, the MCU controller is connected to an LDO chip, and the constant voltage control module is also connected to the LDO chip. The switches include left and right switches, a warning switch, and a power switch. The vehicle's battery powers the flashers. The MCU is powered by a 5V LDO chip, model SUM3559-50KA5, which is an integrated circuit used to provide stable and reliable voltage output. Its main function is to convert the input voltage to the target output voltage and maintain the stability of the output voltage when the input voltage fluctuates. The battery voltage is stepped down to 9.2V via a DC-DC step-down circuit. The left and right front lights of the flashers can be powered by a power switch. The integrated high-side driver refers to the HD70152 driver chip. The instrument lights are driven by discrete components, specifically the 2N5401 transistor.

[0032] Preferably, the constant voltage control module includes a power management chip and a DC-DC step-down circuit. The power management chip is model CX8835. The CX8835 power management chip integrates a high-efficiency power management unit. When a 12V DC voltage is input, this unit is responsible for regulating and filtering the input voltage to ensure a stable and reliable power supply for subsequent circuits. For LED driving, the CX8835 has a step-down control function, which can adjust the output voltage according to preset parameters.

[0033] It should be noted that, in order to ensure the safety and reliability of the system, the CX8835 integrates a variety of protection measures, such as overvoltage protection, overcurrent protection, short circuit protection, and overtemperature protection. These protection mechanisms can cut off the output and limit the current in abnormal situations to prevent damage to the chip and other connected devices.

[0034] Furthermore, the DC-DC step-down circuit includes resistors R47 and R48 connected in parallel with capacitor C24. Resistor R47 is connected to inductor L1, and resistor R48 is connected to resistors R42 and R41. Resistor R41 is grounded, resistor R42 is connected to the VFB pin of the power management chip, inductor L1 is connected to the SW pin of the power management chip (SW is the switching pin used to connect the switching transistor), and resistor R48 is connected to the CSP and CSN pins of the power management chip.

[0035] Working principle: The input voltage of the DC-DC step-down circuit is 12V. The output voltage is set by the voltage divider resistor at the VFB terminal. The output voltage is equal to the sum of the internal reference voltage and the resistance of the VFB pin, and then divided by the resistance to ground. The internal reference voltage is 1V, that is, 1V*(82K+10K) / 10K = 9.2V, thus achieving constant voltage control.

[0036] Preferably, the MOS control module includes a Darlington transistor, resistors R13 and R14 connected to the Darlington transistor, diode Z1, and a P-channel MOS transistor. The MOS transistor conducts when the gate voltage is lower than the source voltage. The Darlington transistor is a ULN2003A, and the P-channel MOS transistor is a CMSC3007. The Darlington transistor includes input pins IN1~IN7 and output pins OUT1~OUT7. Input pin IN4 is the MOS transistor control pin, and input pins IN1~IN7 are used to control the high and low levels of the corresponding output pins.

[0037] MOS control module working principle: When the input is high, the corresponding output pin will be pulled low. When the input is low, the corresponding output pin will be disconnected. IN4 is the MOS control pin. When IN4 is low, OUT4 outputs high and the MOS is not turned on. When IN4 is high, OUT4 outputs low. At this time, the gate voltage is less than the source voltage and the MOS is turned on.

[0038] It should be noted that the power supply voltage is selected by turning the MOSFET on and off. When a constant voltage source is needed, the MOSFET is turned off; conversely, when a constant voltage source is not needed, the MOSFET is turned on.

[0039] This invention uses the CX8835 power management chip to design a BUCK step-down circuit. The output voltage is calculated by the VFB pin. The output voltage of the system is set by the voltage divider resistor at the VFB terminal to make it stable at 9.2V, thus achieving the constant voltage function. Then, the CMSC3007 is used to control the on and off of the power supply to select the power source. When a constant voltage source is needed, the MOS is disconnected to achieve the constant voltage function.

[0040] This invention extends the lifespan of LED lamps. The new built-in constant voltage source flasher for LED lamps adopts a highly integrated circuit design, reducing the number of discrete components and making the overall structure more compact and smaller in size. The built-in constant voltage source module can provide stable power support under various environmental conditions, enhancing the reliability of the entire system and preventing damage to LED lamps due to voltage fluctuations. The efficient constant voltage source design reduces energy loss and improves power conversion efficiency, making the system more energy-efficient. The modular design facilitates production and maintenance, while also improving the system's scalability. Integrating the constant voltage function into the flasher simplifies the external circuitry, making installation and debugging easier. By stabilizing the voltage output, electromagnetic interference caused by current fluctuations is reduced, improving the system's electromagnetic compatibility.

[0041] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0042] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0043] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0044] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A flasher with a built-in LED fixture constant voltage source, characterized by: Include, Constant voltage control module, MOS control module, MCU controller, integrated high side drive and switch; The constant voltage control module is used for voltage stabilization, filtering processing to input voltage, and the MOS control module is used for controlling the opening and closing of the power switch.

2. The strobe of claim 1, wherein: The MCU controller is connected with an LDO chip, the constant voltage control module is connected with the LDO chip, and the switch comprises left and right switches, warning switches and power switches.

3. The strobe of claim 1, wherein: the LED lamp is a built-in LED lamp; the constant voltage source is a constant voltage source of the built-in LED lamp; and the constant current source is a constant current source of the built-in LED lamp. The constant voltage control module comprises a power management chip and a DCDC buck circuit, and the model of the power management chip is CX8835.

4. The strobe of claim 3, wherein: The DCDC buck circuit comprises a capacitor C24, resistors R47 and R48 connected in parallel, and the resistor R47 is connected with an inductor L1.

5. The strobe of claim 4, wherein: The resistor R48 is connected with resistors R42 and R41, the resistor R41 is grounded, and the resistor R42 is connected with the VFB pin of the power management chip.

6. The strobe of claim 5, wherein: The inductor L1 is connected with the SW pin of the power management chip, and the resistor R48 is connected with the CSP and CSN pins of the power management chip.

7. The strobe of claim 1, wherein: the LED lamp is a built-in LED lamp; and the constant voltage source is a constant voltage source of the built-in LED lamp. The MOS control module comprises a darlington tube, resistors R13 and R14, a diode Z1 and a P-channel MOS tube connected with the darlington tube.

8. The strobe of claim 7, wherein: The model of the darlington tube is ULN2003A, and the model of the P-channel MOS tube is CMSC3007.

9. The strobe of claim 8, wherein: The darlington tube comprises input pins IN1-IN7 and output pins OUT1-OUT7, and the input pin IN4 is a MOS control pin.

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