Driving circuit of LED lamp and magnetic suction lamp

Abstract

The utility model discloses a kind of driving circuit and magnetic attraction lamp of LED lamp, including power management module, constant voltage output module, linear voltage stabilizing module, LED drive module, control module and LED lamp group.Power management module is connected with constant voltage output module, linear voltage stabilizing module and LED lamp group respectively, and LED drive module is connected with linear voltage stabilizing module, LED lamp group and control module respectively.Through modular integrated design, circuit structure is simple, component quantity is less, and stability is high.Constant voltage output module and linear voltage stabilizing module cooperate to provide pure stable power supply for rear circuit;LED lamp group is configured with multiple color or color temperature lamp beads, control module receives external adjustment signal, and each channel is independently controlled by LED drive module, to realize brightness adjustment, color temperature switching and dynamic light mixing and other various light effects.The driving circuit structure is compact, and reliability is strong, can be flexibly adapted to different lamps, and significantly improve user experience.

Description

Technical Field

[0001] This utility model relates to the field of LED lighting technology, specifically to a driving circuit for an LED lamp and a magnetic lamp. Background Technology

[0002] LED lights, with their advantages of energy saving, environmental friendliness, and long lifespan, are widely used in various lighting products. In existing LED driver circuits, dedicated RGBW constant current driver ICs are typically used to drive multi-color LED groups (such as RGBW) to achieve independent control. These dedicated constant current driver chips integrate multiple constant current sources and complex control logic, enabling them to directly output stable current to drive LED beads of different colors. However, for low-power LED lights (such as magnetic lights, ambient lights, and portable lamps), the use of such dedicated RGBW constant current driver ICs has significant shortcomings: firstly, the internal structure of the dedicated chip is complex, and the external circuit often requires matching with many resistors, capacitors, and other components, resulting in a complex driver circuit that occupies a large area of ​​the circuit board, hindering product miniaturization; secondly, the cost of dedicated constant current driver ICs is high, and for low-power LED products, the cost of the driver circuit accounts for a large proportion, significantly increasing the overall production cost and limiting the product's market competitiveness. Therefore, how to simplify the driver circuit structure of low-power LED lights, reduce production costs, and simultaneously ensure flexible control of multi-color LED beads has become a pressing technical problem to be solved in this field. Utility Model Content

[0003] To address the problem of complex structures in existing LED lamp driver circuits, this invention provides an LED lamp driver circuit and a magnetic lamp. The specific technical solution of this invention is as follows:

[0004] A driving circuit for an LED lamp includes: a power management module, a constant voltage output module, a linear voltage regulator module, an LED driving module, a control module, and an LED lamp assembly. The power management module is connected to the constant voltage output module, the linear voltage regulator module, and the LED lamp assembly. The LED driving module is connected to the linear voltage regulator module, the LED lamp assembly, and the control module. The linear voltage regulator module is connected to the control module. The power management module supplies received external power to the linear voltage regulator module and the LED lamp assembly. The constant voltage output module adjusts the voltage of the external power supply supplied by the power management module to the linear voltage regulator module and the LED lamp assembly to a set voltage. The linear voltage regulator module converts the adjusted set voltage of the external power supply into the operating voltage of the LED driving module and the control module. The LED driving module includes a driving chip U4 and several field-effect transistors (FETs) with their gates connected to the driving chip U4. The LED lamp assembly includes several LED beads of different colors. The driving chip U4 receives externally input LED lamp assembly adjustment signals or LED lamp assembly adjustment signals output by the control module, and controls the LED beads of different colors to work individually or in combination via the FETs.

[0005] Further, the power management module includes a power management chip U1, resistors R1, R2, R3, R4, and R5, capacitors C1, C2, C3, C4, and C5, an inductor L1, LEDs LR and LG, a battery input terminal BAT+ and BAT-, a power supply terminal 5V+ and 5V-, and a ground terminal GND. Pin 1 of the power management chip U1 is connected to the ground terminal GND via resistor R3, pin 2 is connected to the ground terminal GND via resistor R2, pin 3 is connected to the ground terminal GND via a series connection of resistor R1 and LED LG, and pin 4 is connected to the ground terminal GND via LED LR. Pin 5 is connected to the battery input terminal BAT+, pin 6 is connected to the battery input terminal BAT+ through inductor L1, pin 7 is connected to the power supply terminal 5V-, pin 8 is connected to the power supply terminal 5V+, and pin 9 is connected to the ground terminal GND; capacitor C1 is connected in series between the power supply terminals 5V+ and 5V-; capacitors C3 and C5 are connected in parallel, with one end connected to the ground terminal GND and the other end connected to pin 5 of the power management chip U1; capacitor C4 and resistor R4 are connected in series, with one end connected to the ground terminal GND and the other end connected to pin 6 of the power management chip U1; capacitor C2 and resistor R5 are connected in series, with one end connected to the ground terminal GND and the other end connected to pin 8 of the power management chip U1.

[0006] Furthermore, the constant voltage output module includes a chip U2, a capacitor C6, and a resistor R21; pins 1 and 2 of the chip U2 are both connected to the battery input terminal BAT-, pin 3 is connected to the battery input terminals BAT+ and BAT- respectively through resistor R21 and capacitor C6, and pins 4 and 5 are connected to the ground terminal GND.

[0007] Furthermore, the linear voltage regulator module includes a chip U3, capacitors C7, C8, and C9; pin 1 of the chip U3 is connected to the ground terminal GND, and pin 3 is connected to the battery input terminal BAT+; capacitor C7 is connected between pins 1 and 3 of the chip U3; capacitors C8 and C9 are connected in parallel between pins 1 and 2 of the chip U3.

[0008] Furthermore, the LED driver module includes resistors R11, R12, R13, R14, R15, R16, R17, R18, R19, and R20; the field-effect transistors include field-effect transistors Q1, Q2, Q3, Q4, and Q5; pin 1 of the driver chip U4 is connected to ground GND, pin 2 is connected to the gate of field-effect transistor Q1 through resistor R11, and pin 3 is connected to the gate of field-effect transistor Q2 through resistor R12. The gates are connected as follows: pin 5 is connected to the gate of MOSFET Q3 through resistor R13; pin 6 is connected to the gate of MOSFET Q4 through resistor R14; pin 7 is connected to the gate of MOSFET Q5 through resistor R15; and pin 8 is connected to pin 2 of chip U3. The gates of MOSFETs Q1, Q2, Q3, Q4, and Q5 are connected to ground terminal GND through resistors R16, R17, R18, R19, and R20, respectively, and the sources are connected to ground terminal GND.

[0009] Furthermore, the control module includes a sensing control chip U5, resistors RS and R27, capacitors C11 and CS, and a signal input terminal TK. Pin 1 of the sensing control chip U5 is connected to the signal input terminal TK through resistor RS, pin 2 is connected to the ground terminal GND, pin 3 is connected to the ground terminal GND through capacitor CS, pin 5 is connected to pin 2 of chip U3, and pin 6 is connected to pin 4 of driver chip U4 through resistor R27. One end of capacitor C11 is connected to pin 5 of sensing control chip U5, and the other end is connected to the ground terminal GND.

[0010] Furthermore, the control module also includes an infrared connector H1, a capacitor C10, and a resistor R26 for receiving external input LED light group adjustment signals. Pin 1 of the infrared connector is connected to pin 4 of the driver chip U4, pin 2 is connected to the ground terminal GND, and pin 3 is connected to pin 2 of the chip U3 through the resistor R26. One end of the capacitor C10 is connected to pin 3 of the infrared connector H1, and the other end is connected to the ground terminal GND.

[0011] Furthermore, the LED light group includes resistors R6, R7, R8, R9, R23, R24, R25, LED B, LED R, LED G, LED W, and LED Y; resistors R6, R7, R8, and R9 are connected in parallel, with one end connected to LED B, LED R, LED G, LED W, and LED Y respectively, and the other end connected to the battery input terminal BAT+; LED W and LED Y are connected to field-effect transistors Q1 and Q2 respectively; LED G, LED R, and LED B are connected to field-effect transistors Q3, Q4, and Q5 respectively through resistors R25, R24, and R23.

[0012] A magnetic lamp, wherein the magnetic lamp is provided with the aforementioned LED lamp driving circuit.

[0013] Compared with the prior art, the LED lamp driving circuit provided in this application significantly simplifies the circuit architecture while ensuring the independent control function of multi-color LED beads, achieving the following beneficial technical effects:

[0014] The LED driver module uses a general-purpose chip and external MOSFETs instead of a dedicated constant current chip, significantly simplifying the driver architecture and reducing costs. This application's LED driver module no longer uses expensive dedicated RGBW constant current driver ICs, but instead employs a general-purpose driver chip U4 (such as a common MCU or I / O expansion chip) in conjunction with multiple external N-MOSFETs (field-effect transistors Q1-Q5). The driver chip U4 drives the gates of each MOSFET through resistors R11-R15 via pins 2, 3, 5, 6, and 7. The source of the MOSFET is grounded, and the drain is connected to LED beads of different colors. This "general-purpose chip + external MOSFET" solution enables independent constant current control of multiple LED beads, satisfying the individual or collaborative operation requirements of multiple RGBW colors while avoiding the use of complex and expensive dedicated constant current chips. This significantly reduces circuit complexity and component costs, making it particularly suitable for low-power, low-cost LED lighting applications.

[0015] The power management module features an extremely simplified input path, reducing redundant components and improving reliability: Pin 5 of the power management chip U1 in this application is directly connected to the battery input terminal BAT+, without any series diodes, fuses, reverse connection protection circuits, or switching transistors. This direct-connection design eliminates components commonly found in traditional input stages, such as reverse connection protection diodes, overcurrent fuses, and switching transistors. This not only simplifies the circuit layout and reduces the PCB footprint but also lowers the on-state voltage drop and energy loss introduced by additional components, improving power conversion efficiency and system reliability. Meanwhile, pin 6 of U1 is connected to BAT+ through inductor L1, forming a boost or buck topology with the internal switching transistor. Only a few external resistors and capacitors are needed to complete the power management function, making the overall input stage extremely simple.

[0016] The power management chip and the linear regulator chip work together directly to supply power, reducing the number of voltage conversion stages: In this application, the 5V+ power output of the power management chip U1 (after adjustment by the constant voltage output module) is directly connected to pin 3 (input terminal) of the linear regulator chip U3. Pin 2 of U3 outputs a stable low-voltage power supply to power the driver chip U4 and the control module. There are no additional intermediate voltage conversion or isolation circuits between U1 and U3, forming a direct power supply collaboration. This simple cascaded structure makes the voltage conversion path between the power management module and the linear regulator module more direct, reducing redundant voltage regulation stages, which reduces energy loss and the number of external filter capacitors and other components, further optimizing the overall circuit size and cost.

[0017] Multiple LED bead configurations enable rich lighting effects: The LED light assembly of this application includes five different colors / color temperatures: white LED W, warm LED Y, red LED R, green LED G, and blue LED B. After receiving touch signals from the sensing control chip U5 or remote control signals from the infrared connector H1, the driver chip U4 independently controls the duty cycle of each MOSFET to achieve various lighting effect modes such as independent white / warm light dimming, RGB full-color mixing, and color temperature adjustment, meeting the lighting needs of different scenarios with flexible control and rapid response. Attached Figure Description

[0018] Figure 1 This is a circuit diagram of the driving circuit for an LED lamp in one embodiment of the present invention.

[0019] Figure 2 This is a schematic diagram of the structure of a magnetic lamp in one embodiment of the present invention;

[0020] Figure 3 This is an exploded view of the magnetic lamp in one embodiment of the present invention. Figure 1 ;

[0021] Figure 4 This is an exploded view of the magnetic lamp in one embodiment of the present invention. Figure 2 . Detailed Implementation

[0022] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.

[0023] In the description of this utility model, it should be noted that the directional terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and 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. They should not be construed as limiting the specific protection scope of this utility model.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. Thus, the use of "first" and "second" to define a feature may explicitly or implicitly include one or more of that feature, and in this description of the utility model, "at least" means one or more, unless otherwise explicitly specified.

[0025] In this utility model, unless otherwise explicitly specified and limited, the terms "assembly," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can also refer to a mechanical connection; they can refer to a direct connection or a connection through an intermediate medium; or they can refer to an internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] In this utility model, unless otherwise specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "below," and "over" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Above," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0027] The following description, in conjunction with the accompanying drawings, further illustrates specific embodiments of the present invention, making the technical solution and beneficial effects of the present invention clearer and more explicit. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0028] like Figures 1 to 4 As shown, a driving circuit for an LED lamp includes: a power management module, a constant voltage output module, a linear voltage regulator module, an LED driver module, a control module, and an LED lamp assembly. The power management module is connected to the constant voltage output module, the linear voltage regulator module, and the LED lamp assembly, and is used to manage and distribute the input external power supply. The LED driver module is connected to the linear voltage regulator module, the LED lamp assembly, and the control module, serving as the power driving core of the LED lamp assembly. The linear voltage regulator module is connected to both the LED driver module and the control module, providing a stable operating voltage for both modules. The overall workflow is as follows: The power management module receives external power input (such as a battery or adapter), processes it initially, and then supplies it to the linear regulator module and the LED group. The constant voltage output module precisely adjusts the voltage of the external power input from the power management module to the linear regulator module and the LED group, stabilizing it at a set voltage level. The linear regulator module further converts the adjusted external power into a low-noise, high-precision operating voltage required by the LED driver module and the control module. The control module receives external LED group adjustment signals (such as touch sensing signals or infrared remote control signals) and outputs corresponding pulse width modulation (PWM) control signals to the LED driver module according to preset logic. The LED driver module includes a driver chip U4 and several field-effect transistors (FETs) with their gates connected to the driver chip U4. The LED group includes several LED beads of different colors. The driver chip U4 receives external LED group adjustment signals or LED group adjustment signals output by the control module and controls the LED beads of different colors to work individually or in combination via the FETs. This achieves the adjustment of the LED group's brightness, color temperature, or color.

[0029] In one embodiment, the power management module includes a power management chip U1 (e.g., a lithium battery charging management chip), resistors R1, R2, R3, R4, and R5, capacitors C1, C2, C3, C4, and C5, an inductor L1, LEDs LR and LG, a battery input terminal BAT+, a battery input terminal BAT-, a power supply terminal 5V+, a power supply terminal 5V-, and a ground terminal GND. Pin 1 of the power management chip U1 (typically a charging current setting pin) is connected to the ground terminal GND via resistor R3 and is used to set the charging current. Pin 2 (typically a charging status indicator pin) is connected to the ground terminal GND via resistor R2. Pin 3 (typically a charging completion indicator pin) is connected to the ground terminal GND via a series resistor R1 and LED LG, illuminating a green LED when charging is complete. Pin 4 is connected to the ground terminal GND via LED LR, illuminating a red LED when charging is in progress. The circuit includes a color LED; pin 5 (positive battery input) is connected to the battery input BAT+ for connecting to the positive battery terminal; pin 6 (switch node) is connected to the battery input BAT+ through inductor L1 to form a boost or buck topology; pin 7 is connected to the power supply terminal 5V- as the output negative terminal; pin 8 is connected to the power supply terminal 5V+ as the output positive terminal; pin 9 is connected to the ground terminal GND; capacitor C1 serves as the output filter capacitor, connected in series between the power supply terminals 5V+ and 5V-; capacitors C3 and C5 are connected in parallel as the input filter capacitor, with one end connected to the ground terminal GND and the other end connected to pin 5 of the power management chip U1; capacitor C4 and resistor R4 are connected in series to form a compensation network, with one end connected to the ground terminal GND and the other end connected to pin 6 of the power management chip U1; capacitor C2 and resistor R5 are connected in series to form another compensation network, with one end connected to the ground terminal GND and the other end connected to pin 8 of the power management chip U1.

[0030] In one embodiment, the constant voltage output module includes a chip U2 (e.g., a linear regulator or voltage reference source), a capacitor C6, and a resistor R21; pins 1 and 2 of the chip U2 are both connected to the battery input terminal BAT- as a common negative terminal; pin 3 serves as a reference or output terminal, and is connected to the battery input terminals BAT+ and BAT- respectively through resistor R21 and capacitor C6 to achieve voltage sampling and stabilization; pins 4 and 5 are connected to the ground terminal GND.

[0031] In one embodiment, the linear regulator module includes a chip U3 (e.g., a low dropout linear regulator LDO), capacitors C7, C8, and C9; pin 1 of the chip U3 is connected to the ground terminal GND as a common ground; pin 3 is connected to the battery input terminal BAT+ to receive the input voltage; capacitor C7 serves as an input filter capacitor and is connected between pins 1 and 3 of the chip U3; capacitors C8 and C9 are connected in parallel as output filter capacitors and are connected between pins 1 and 2 (voltage output terminals) of the chip U3 to provide a stable, low-ripple DC voltage for subsequent circuits.

[0032] In one embodiment, the LED driving module includes a driver chip U4 (e.g., a general-purpose MCU or I / O expansion chip), resistors R11, R12, R13, R14, R15, R16, R17, R18, R19, R20, and field-effect transistors Q1, Q2, Q3, Q4, and Q5. Pin 1 of the driver chip U4 is connected to ground (GND). Pins 2, 3, 5, 6, and 7 are multi-channel PWM signal output terminals, respectively, with resistors R11, R12, R13, R14, and R15 serving as gate drivers. A dynamic resistor is connected to the gates of MOSFETs Q1, Q2, Q3, Q4, and Q5 to control their on / off states. Pin 8 is the chip power supply terminal, connected to pin 2 of chip U3 to receive the operating voltage. The gates of MOSFETs Q1, Q2, Q3, Q4, and Q5 are connected to ground GND through current sampling resistors R16, R17, R18, R19, and R20, respectively. The sources of all MOSFETs are connected to ground GND. Resistors R16, R17, R18, R19, and R20 are gate pull-down resistors to ensure reliable turn-off of the MOSFETs when the drive signal is floating / high impedance, avoiding false turn-on, and also providing auxiliary functions such as anti-static and oscillation suppression.

[0033] In one embodiment, the control module includes a sensing control chip U5 (e.g., a touch sensing or signal processing MCU), resistors RS and R27, capacitors C11 and CS, and a signal input terminal TK. Pin 1 (signal input pin) of the sensing control chip U5 is connected to the signal input terminal TK through resistor RS to receive touch or external control signals; pin 2 is connected to ground GND; pin 3 is connected to ground GND through capacitor CS as an external sensitivity adjustment capacitor; pin 5 is a power input terminal, connected to pin 2 of chip U3 to receive the operating voltage; pin 6 is a control signal output terminal, connected to pin 4 (PWM control input terminal) of driver chip U4 through resistor R27 to transmit dimming or color adjustment commands; capacitor C11 serves as a power filter capacitor, with one end connected to pin 5 of the sensing control chip U5 and the other end connected to ground GND.

[0034] In one embodiment, the control module further includes an infrared connector H1 for receiving externally input LED light group adjustment signals, used to extend infrared remote control functionality. Pin 1 of the infrared connector is connected to pin 4 of the driver chip U4 for direct transmission of remote control signals; pin 2 is connected to ground GND; pin 3 is connected to pin 2 of chip U3 via resistor R26 to power the infrared connector H1. One end of the capacitor C10 (reset or delay network) is connected to pin 3 of the infrared connector H1, and the other end is connected to ground GND.

[0035] In one embodiment, the LED light group includes an indicator module, specifically comprising resistors R6, R7, R8, R9, R23, R24, R25, LED B (blue light), LED R (red light), LED G (green light), LED W (white light), and LED Y (warm white light). Resistors R6, R7, R8, and R9 are connected in parallel as a common current-limiting resistor for the multiple LEDs, with one end connected to LED B, LED R, LED G, LED W, and LED Y respectively. The anode of LED D is connected to the battery input terminal BAT+, providing positive power to the LED. The cathodes of LED Y and LED W are connected to the drains of MOSFETs Q1 and Q2, respectively, enabling independent control of white and warm white light through the switching of the MOSFETs. The cathodes of LEDs G, R, and B are connected to the drains of MOSFETs Q3, Q4, and Q5, respectively, through resistors R25, R24, and R23 as current-limiting resistors, enabling independent dimming control of RGB colors.

[0036] A magnetic lamp is provided, wherein the magnetic lamp is equipped with the aforementioned LED light driving circuit. The magnetic lamp includes a base 1, a magnetic base 2 connected to the base 1, and a magnetic bulb 3. The base 1 may be equipped with a power cord, and the magnetic bulb 3 can be electrically connected to the base 1 through the magnetic base 2. The magnetic bulb 3 has a battery and can also emit light on its own using a battery.

[0037] Compared with the prior art, the LED lamp driving circuit provided in this application significantly simplifies the circuit architecture while ensuring the independent control function of multi-color LED beads, achieving the following beneficial technical effects:

[0038] The LED driver module uses a general-purpose chip and external MOSFETs instead of a dedicated constant current chip, significantly simplifying the driver architecture and reducing costs. This application's LED driver module no longer uses expensive dedicated RGBW constant current driver ICs, but instead employs a general-purpose driver chip U4 (such as a common MCU or I / O expansion chip) in conjunction with multiple external N-MOSFETs (field-effect transistors Q1-Q5). The driver chip U4 drives the gates of each MOSFET through resistors R11-R15 via pins 2, 3, 5, 6, and 7. The source of the MOSFET is grounded, and the drain is connected to LED beads of different colors. This "general-purpose chip + external MOSFET" solution enables independent constant current control of multiple LED beads, satisfying the individual or collaborative operation requirements of multiple RGBW colors while avoiding the use of complex and expensive dedicated constant current chips. This significantly reduces circuit complexity and component costs, making it particularly suitable for low-power, low-cost LED lighting applications.

[0039] The power management module features an extremely simplified input path, reducing redundant components and improving reliability: Pin 5 of the power management chip U1 in this application is directly connected to the battery input terminal BAT+, without any series diodes, fuses, reverse connection protection circuits, or switching transistors. This direct-connection design eliminates components commonly found in traditional input stages, such as reverse connection protection diodes, overcurrent fuses, and switching transistors. This not only simplifies the circuit layout and reduces the PCB footprint but also lowers the on-state voltage drop and energy loss introduced by additional components, improving power conversion efficiency and system reliability. Meanwhile, pin 6 of U1 is connected to BAT+ through inductor L1, forming a boost or buck topology with the internal switching transistor. Only a few external resistors and capacitors are needed to complete the power management function, making the overall input stage extremely simple.

[0040] The power management chip and the linear regulator chip work together directly to supply power, reducing the number of voltage conversion stages: In this application, the 5V+ power output of the power management chip U1 (after adjustment by the constant voltage output module) is directly connected to pin 3 (input terminal) of the linear regulator chip U3. Pin 2 of U3 outputs a stable low-voltage power supply to power the driver chip U4 and the control module. There are no additional intermediate voltage conversion or isolation circuits between U1 and U3, forming a direct power supply collaboration. This simple cascaded structure makes the voltage conversion path between the power management module and the linear regulator module more direct, reducing redundant voltage regulation stages, which reduces energy loss and the number of external filter capacitors and other components, further optimizing the overall circuit size and cost.

[0041] Multiple LED bead configurations enable rich lighting effects: The LED light assembly of this application includes five different colors / color temperatures: white LED W, warm LED Y, red LED R, green LED G, and blue LED B. After receiving touch signals from the sensing control chip U5 or remote control signals from the infrared connector H1, the driver chip U4 independently controls the duty cycle of each MOSFET to achieve various lighting effect modes such as independent white / warm light dimming, RGB full-color mixing, and color temperature adjustment, meeting the lighting needs of different scenarios with flexible control and rapid response.

[0042] In the description of this specification, the terms "another embodiment," "preferred," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. The illustrative expressions of the above terms in this specification do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples. The connection methods linked in the description of this specification have significant effects and practical utility.

[0043] Based on the above description of the structure and principle, those skilled in the art should understand that this utility model is not limited to the specific embodiments described above. Improvements and substitutions based on this utility model using techniques known in the art all fall within the protection scope of this utility model and should be defined by the claims.

Claims

1. A driving circuit for an LED lamp, characterized in that, include: The system includes a power management module, a constant voltage output module, a linear voltage regulator module, an LED driver module, a control module, and an LED lamp group. The power management module is connected to the constant voltage output module, the linear voltage regulator module, and the LED lamp group. The LED driver module is connected to the linear voltage regulator module, the LED lamp group, and the control module. The linear voltage regulator module is connected to the control module. The power management module is used to supply the received external power to the linear voltage regulator module and the LED lamp group. The constant voltage output module is used to adjust the voltage of the external power supplied by the power management module to the linear voltage regulator module and the LED lamp group to a set voltage. The linear voltage regulator module is used to convert the adjusted set voltage of the external power supply into the working voltage of the LED driver module and the control module. The LED driving module includes a driving chip U4 and several field-effect transistors whose gates are respectively connected to the driving chip U4. The LED lamp group includes several LED beads of different colors. The driving chip U4 is used to receive LED lamp group adjustment signals input from the outside or LED lamp group adjustment signals output from the control module, and to control the LED beads of different colors to work individually or in combination through the field-effect transistors.

2. The LED lamp driving circuit according to claim 1, characterized in that, The power management module includes a power management chip U1, resistors R1, R2, R3, R4, and R5, capacitors C1, C2, C3, C4, and C5, an inductor L1, LEDs LR and LG, a battery input terminal BAT+ and BAT-, a power supply terminal 5V+ and 5V-, and a ground terminal GND. Pin 1 of the power management chip U1 is connected to the ground terminal GND via resistor R3; pin 2 is connected to the ground terminal GND via resistor R2; pin 3 is connected to the ground terminal GND via a series connection of resistor R1 and LED LG; pin 4 is connected to the ground terminal GND via LED LR; and pin 5 is connected to… The battery input terminal BAT+ is connected. Pin 6 is connected to the battery input terminal BAT+ through inductor L1. Pin 7 is connected to the power supply terminal 5V-. Pin 8 is connected to the power supply terminal 5V+. Pin 9 is connected to the ground terminal GND. The capacitor C1 is connected in series between the power supply terminals 5V+ and 5V-. The capacitors C3 and C5 are connected in parallel, with one end connected to the ground terminal GND and the other end connected to pin 5 of the power management chip U1. The capacitor C4 and resistor R4 are connected in series, with one end connected to the ground terminal GND and the other end connected to pin 6 of the power management chip U1. The capacitor C2 and resistor R5 are connected in series, with one end connected to the ground terminal GND and the other end connected to pin 8 of the power management chip U1.

3. The LED lamp driving circuit according to claim 2, characterized in that, The constant voltage output module includes a chip U2, a capacitor C6, and a resistor R21; pins 1 and 2 of the chip U2 are both connected to the battery input terminal BAT-, pin 3 is connected to the battery input terminals BAT+ and BAT- respectively through resistor R21 and capacitor C6, and pins 4 and 5 are connected to the ground terminal GND.

4. The LED lamp driving circuit according to claim 3, characterized in that, The linear voltage regulator module includes a chip U3, capacitors C7, C8, and C9; pin 1 of the chip U3 is connected to the ground terminal GND, and pin 3 is connected to the battery input terminal BAT+; capacitor C7 is connected between pins 1 and 3 of the chip U3; capacitors C8 and C9 are connected in parallel between pins 1 and 2 of the chip U3.

5. The LED lamp driving circuit according to claim 4, characterized in that, The LED driver module further includes resistors R11, R12, R13, R14, R15, R16, R17, R18, R19, and R20. The field-effect transistors include Q1, Q2, Q3, Q4, and Q5. Pin 1 of the driver chip U4 is connected to ground (GND), pin 2 is connected to the gate of field-effect transistor Q1 via resistor R11, and pin 3 is connected to the gate of field-effect transistor Q2 via resistor R12. The connections are as follows: pin 5 is connected to the gate of MOSFET Q3 through resistor R13; pin 6 is connected to the gate of MOSFET Q4 through resistor R14; pin 7 is connected to the gate of MOSFET Q5 through resistor R15; and pin 8 is connected to pin 2 of chip U3. The gates of MOSFETs Q1, Q2, Q3, Q4, and Q5 are connected to ground terminal GND through resistors R16, R17, R18, R19, and R20, respectively, and their sources are also connected to ground terminal GND.

6. The LED lamp driving circuit according to claim 5, characterized in that, The control module includes a sensing control chip U5, resistors RS and R27, capacitors C11 and CS, and a signal input terminal TK. Pin 1 of the sensing control chip U5 is connected to the signal input terminal TK through resistor RS, pin 2 is connected to the ground terminal GND, pin 3 is connected to the ground terminal GND through capacitor CS, pin 5 is connected to pin 2 of chip U3, and pin 6 is connected to pin 4 of driver chip U4 through resistor R27. One end of capacitor C11 is connected to pin 5 of sensing control chip U5, and the other end is connected to the ground terminal GND.

7. The LED lamp driving circuit according to claim 6, characterized in that, The control module also includes an infrared connector H1, a capacitor C10, and a resistor R26 for receiving external input LED light group adjustment signals. Pin 1 of the infrared connector is connected to pin 4 of the driver chip U4, pin 2 is connected to the ground terminal GND, and pin 3 is connected to pin 2 of the chip U3 through the resistor R26. One end of the capacitor C10 is connected to pin 3 of the infrared connector H1, and the other end is connected to the ground terminal GND.

8. The LED lamp driving circuit according to claim 7, characterized in that, The LED light group includes resistors R6, R7, R8, R9, R23, R24, R25, LED B, LED R, LED G, LED W, and LED Y. Resistors R6, R7, R8, and R9 are connected in parallel, with one end connected to LED B, LED R, LED G, LED W, and LED Y respectively, and the other end connected to the battery input terminal BAT+. LED W and LED Y are connected to MOSFETs Q1 and Q2 respectively. LED G, LED R, and LED B are connected to MOSFETs Q3, Q4, and Q5 respectively via resistors R25, R24, and R23.

9. A magnetic lamp, characterized in that, The magnetic lamp is provided with a driving circuit for an LED lamp as described in any one of claims 1 to 8.

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