Color temperature adjustable LED plug lamp and driving circuit thereof

Abstract

The utility model discloses a color temperature adjustable LED plug lamp and a driving circuit thereof. The color temperature adjustable LED plug lamp comprises a rectification module, a constant current driving module, a voltage stabilization module, a switch voltage regulation module, a main control module and a light emitting module. The input end of the rectification module is connected with an alternating current power supply, the output end of the rectification module is connected with the input end of the constant current driving module, the output end of the constant current driving module is connected with the input end of the voltage stabilization module, the output end of the voltage stabilization module is connected with the switch voltage regulation module, the switch voltage regulation module is connected with the main control module, and the main control module is connected with the light emitting module. The rectifier module is used for converting an alternating current power supply into direct current, the constant-current driving module receives the direct current output by the rectifier module and reduces the voltage of the direct current to form first power supply voltage to be output, and the voltage stabilizing module converts electric signals output by the constant-current driving module into stable second power supply voltage. The switch voltage regulating module is used for regulating the magnitude of the second power supply voltage output by the voltage stabilizing module, and the master control module outputs a PWM signal to the light emitting module according to the second power supply voltage.

Description

Technical Field

[0001] This utility model relates to the field of LED pluggable lamp driving circuit technology, specifically to an adjustable color temperature LED pluggable lamp and its driving circuit. Background Technology

[0002] As the application scope of LED lighting continues to expand, LED lighting is gradually evolving from its simplest function of illumination towards intelligence, user-friendliness, and energy efficiency. To meet people's lighting requirements in different scenarios, plug-in LED luminaires with on / off color temperature adjustment functions have emerged.

[0003] In existing technologies, dimming is achieved by incorporating one or more LEDs with different color temperatures into plug-in LEDs, and by activating these LEDs during use. Taking LED1 and LED2 with different color temperatures as an example, they can emit light with the color temperature of LED1, the color temperature of LED2, or a mixed color temperature of LED1 and LED2, respectively. Therefore, it can be seen that the adjustable range of color temperature in existing plug-in LED light technology is limited by the type of color temperature of the LEDs. Utility Model Content

[0004] To address the shortcomings of existing technologies, an adjustable color temperature LED pluggable lamp and its driving circuit are provided.

[0005] To achieve the above objectives, this utility model provides an adjustable color temperature LED driving circuit, including a rectifier module, a constant current driving module, a voltage regulator module, a switching voltage regulator module, a main control module, and a light-emitting module. The input terminal of the rectifier module is connected to an AC power supply, the output terminal of the rectifier module is connected to the input terminal of the constant current driving module, the output terminal of the constant current driving module is connected to the input terminal of the voltage regulator module, the output terminal of the voltage regulator module is connected to the switching voltage regulator module, the switching voltage regulator module is connected to the main control module, and the main control module is connected to the light-emitting module. The rectifier module converts the AC power supply into DC power. The constant current driving module receives the DC power output from the rectifier module and steps it down to form a first supply voltage output. The voltage regulator module converts the electrical signal output from the constant current driving module into a stable second supply voltage. The switching voltage regulator module adjusts the magnitude of the second supply voltage output from the voltage regulator module. The main control module outputs a PWM signal to the light-emitting module according to the second supply voltage.

[0006] According to one embodiment of the present invention, it further includes a protection module, which includes an overcurrent protection unit and an overvoltage protection unit; the rectifier module includes a rectifier bridge DB1, which has a first input terminal, a second input terminal, an output terminal and a ground terminal; one end of the overcurrent protection unit is connected to the live wire L of the AC power supply, and the other end is connected to one end of the overvoltage protection unit and the second input terminal of the rectifier bridge DB1, and the other end of the overvoltage protection unit is connected to the neutral wire N of the AC power supply and the first input terminal of the rectifier bridge DB1.

[0007] According to one embodiment of the present invention, the constant current drive module includes a chip U1, a capacitor CB1, and a diode D1. The chip U1 has a first pin to an eighth pin. The first pin, the second pin, and the eighth pin of the chip U1 are grounded. The fourth pin of the chip U1 is connected to the output terminal of the rectifier module. The positive terminal of the diode D1 is connected to the fifth pin of the chip U1, and its negative terminal is connected to the output terminal of the rectifier module and the input terminal of the voltage regulator module, respectively.

[0008] According to one embodiment of the present invention, the voltage regulator module includes a voltage regulator filter unit, a voltage regulator chip U2, and an output filter unit. The voltage regulator filter unit includes an iron core inductor T1, a capacitor CE1, a resistor R4, a diode D2, and a capacitor C4. One end of the iron core inductor T1 is connected to the fifth pin of the chip U1 and the positive terminal of the diode D1, and the other end is connected to one end of the capacitor CE1, one end of the resistor R4, and the ground terminal of the voltage regulator chip U2. The other end of the capacitor CE1 is connected to the output terminal of the constant current drive module, the other end of the resistor R4, and the positive terminal of the diode D2. The cathode of the diode D2 is connected to the capacitor C4 and the input terminal of the voltage regulator chip U2, and the other end of the capacitor C4 is connected to the ground terminal of the voltage regulator chip U2. One end of the output filter unit is connected to the output terminal of the voltage regulator chip U2, and the other end is connected to the ground terminal of the voltage regulator chip U2.

[0009] According to one embodiment of the present invention, the switching voltage regulation module includes a toggle switch SW1, a first voltage divider unit, and a second voltage divider unit. The toggle switch SW1 has a first pin to a tenth pin. The first pin and the tenth pin of the toggle switch SW1 are respectively connected to the input terminal of the main control module and the output terminal of the voltage regulator module. The second pin and the ninth pin of the toggle switch SW1 are jointly connected to one end of the first voltage divider unit. The other end of the first voltage divider unit is respectively connected to the output terminal of the voltage regulator module and the input terminal of the main control module. The third pin and the eighth pin of the toggle switch SW1 are connected to the V- terminal. The fourth pin and the seventh pin of the toggle switch SW1 are jointly connected to one end of the second voltage divider unit. The other end of the second voltage divider unit is respectively connected to the output terminals of the first voltage divider unit and the voltage regulator unit. The fifth pin and the sixth pin of the toggle switch SW1 are connected together.

[0010] According to one embodiment of the present invention, the light-emitting module includes a first light-emitting unit and a second light-emitting unit. The first light-emitting unit includes a first light-emitting component and a MOSFET Q2. The gate of the MOSFET Q2 is connected to the main control module, the source of the MOSFET Q2 is connected to the V- terminal, the drain of the MOSFET Q2 is connected to one end of the first light-emitting unit, and the other end of the first light-emitting unit is connected to a first power supply voltage. The second light-emitting unit includes a second light-emitting component and a MOSFET Q3. The gate of the MOSFET Q3 is connected to the main control module, the source of the MOSFET Q3 is connected to the V- terminal, the drain of the MOSFET Q3 is connected to one end of the second light-emitting component, and the other end of the second light-emitting component is connected to the first power supply voltage.

[0011] According to one embodiment of the present invention, the light-emitting module further includes a first current-limiting resistor and a second current-limiting resistor. One end of the first current-limiting resistor is connected to the main control module, and the other end is connected to the gate of the MOS transistor Q2. One end of the second current-limiting resistor is connected to the main control module, and the other end is connected to the gate of the MOS transistor Q3.

[0012] According to one embodiment of the present invention, the first voltage divider unit includes resistor R7 and resistor R8. One end of resistor R7 is connected to the ninth pin of toggle switch SW1, and the other end is connected to the output terminal of voltage regulator module and the input terminal of main control module, respectively. Resistor R8 is connected in parallel with resistor R7.

[0013] According to one embodiment of the present invention, the second voltage divider unit includes resistor R9 and resistor R10. One end of resistor R9 is connected to the seventh pin of toggle switch SW1, and the other end is connected to the output terminal of voltage regulator module and the input terminal of main control module respectively. Resistor R10 is connected in parallel with resistor R9.

[0014] This utility model also provides an adjustable color temperature LED pluggable lamp, which includes the above-mentioned adjustable color temperature LED pluggable lamp driving circuit.

[0015] The beneficial effect of this invention lies in the fact that by using a switching voltage regulation module to divide the second power supply voltage output by the voltage regulator module, the voltage input to the main control module is changed. The main control module changes the duty cycle of the output PWM signal according to the input voltage, thereby changing the color temperature of the light-emitting module and making the color temperature of the light-emitting module more variable. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0017] Figure 1 This is a circuit diagram of the adjustable color temperature LED pluggable lamp driver in the embodiment.

[0018] Explanation of reference numerals in the attached figures

[0019] 1. Rectifier module; 2. Constant current drive module; 3. Voltage regulator module; 31. Voltage regulator and filter unit; 32. Output filter unit; 4. Switching voltage regulation module; 41. First voltage divider unit; 42. Second voltage divider unit; 5. Main control module; 6. Light-emitting module; 61. First light-emitting unit; 611. First light-emitting component; 6111. First light-emitting element; 61111. First light-emitting diode; 62. Second light-emitting unit; 621. Second light-emitting component; 62111. Second light-emitting element; 62111. Second light-emitting diode; 63. First current-limiting resistor; 64. Second current-limiting resistor; 7. Protection module; 71. Overcurrent protection unit; 72. Overvoltage protection unit. Detailed Implementation

[0020] The following drawings will disclose several embodiments of this utility model. For clarity, many practical details will be described in the following description. However, it should be understood that these practical details should not be used to limit this utility model. That is, in some embodiments of this utility model, these practical details are not essential. In addition, for the sake of simplicity, some conventional structures and components will be shown in the drawings in a simple schematic manner.

[0021] Furthermore, in this utility model, the use of terms such as "first" and "second" is for descriptive purposes only and does not specifically refer to any order or sequence, nor is it intended to limit the utility model. They are merely used to distinguish components or operations described with the same technical terms and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but only if they are feasible for those skilled in the art. If a combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0022] Please refer to Figure 1 , Figure 1 This is a circuit diagram for an adjustable color temperature LED plug-in lamp driver. This embodiment provides an adjustable color temperature lamp driver circuit, which includes a rectifier module 1, a constant current driver module 2, a voltage regulator module 3, a switching voltage regulator module 4, a main control module 5, and a light-emitting module 6. The output terminal of the rectifier module 1 is connected to the input terminal of the constant current driver module 2, and the output terminal of the constant current driver module 2 is connected to the input terminal of the voltage regulator module 3. The output terminal of the voltage regulator module 3 is connected to the switching voltage regulator module 4. The switching voltage regulator module 4 is also connected to the main control module 5. The main control module 5 is connected to the light-emitting module 6.

[0023] In practical use, the input terminal of rectifier module 1 is connected to an AC power supply, and rectifier module 1 is used to convert the AC power from the input AC power supply into DC power. Constant current drive module 2 is used to convert the current output by rectifier module 1 into a constant first supply voltage output. Voltage regulator module 3 is used to regulate the first supply voltage output by constant current drive module 2 and output a rated second supply voltage. Switching voltage regulator module 4 is used to receive the second supply voltage output by voltage regulator module 3, and by switching its own conduction state, it divides the second supply voltage output by voltage regulator module 3, thus changing the supply voltage received by main control module 5. Main control module 5 receives the second supply voltage regulated by voltage regulator module 3 and changes the duty cycle of the output PWM signal according to the second supply voltage. Light emission module 6 is used to receive the PWM signal output by the main control chip and change its emission color temperature according to the PWM signal output by the main control chip.

[0024] Specifically, the adjustable color temperature lamp driver circuit also includes a protection module 7. Protection module 7 includes an overcurrent protection unit 71 and an overvoltage protection unit 72. Rectifier module 1 includes a rectifier bridge DB1, which has a first input terminal, a second input terminal, an output terminal, and a ground terminal. One end of the overcurrent protection unit 71 is connected to the live wire L of the input AC power supply, and its other end is connected to one end of the overvoltage protection unit and the second input terminal of the rectifier bridge BD1. The other end of the overvoltage protection unit is connected to the neutral wire N of the AC power supply, and its other end is connected to the first input terminal of the rectifier bridge BD1.

[0025] In this example, the overcurrent protection unit 71 includes a fuse F1, which melts itself to interrupt the current when the input current abnormally increases or the temperature becomes too high, thereby protecting the circuit. The overvoltage protection unit includes a varistor VR1. When the input voltage exceeds the rated voltage of the varistor VR1, the resistance of the varistor VR1 decreases rapidly, thereby absorbing the energy of the overvoltage and protecting the circuit from damage. By connecting the overcurrent protection unit 71 in parallel with the overvoltage protection unit, the circuit is effectively protected against both overvoltage and overcurrent conditions.

[0026] The constant current drive module 2 includes a chip U1, a capacitor CB1, and a diode D1. Chip U1 has pins one through eight. The output of rectifier module 1 is connected to pin four of chip U1. Pins two, one, and eight of chip U1 are grounded. Pins five and six of chip U1 are connected to the anode of diode D1 and voltage regulator module 3. The cathode of diode D1 is connected to the output of rectifier module 1 and voltage regulator module 3, respectively. Diode D1 is used for reverse current protection to prevent the current output from chip U1 from flowing in the opposite direction. One end of capacitor CB1 is connected to pin four of chip U1, and the other end is grounded. Capacitor CB1 is used for filtering; preferably, capacitor CB1 is a ceramic dielectric capacitor.

[0027] In this example, chip U1 is a constant current driver chip, model BP2362JH. Chip U1 is used to convert the DC signal output from rectifier module 1 into a stable first supply voltage output. In this example, the first supply voltage is +35V.

[0028] The voltage regulator module 3 includes a voltage regulator filter unit 31, a voltage regulator chip U2, and an output filter unit 32. The voltage regulator filter unit 31 includes an iron-core inductor T1, a capacitor CE1, a resistor R4, a diode D2, and a capacitor C4. One end of the iron-core inductor T1 is connected to the fifth pin of the chip U1 and the anode of the diode D1, while the other end is connected to one end of the capacitor CE1, one end of the resistor R4, and the ground terminal of the voltage regulator chip. The other end of the capacitor CE1 is connected to the cathode of the diode D1, the fourth pin of the chip U1, the other end of the resistor R4, and the anode of the diode D2. The cathode of the diode D2 is connected to the capacitor C4 and the input terminal of the voltage regulator chip U2. The other end of the capacitor C4 is connected to the ground terminal of the voltage regulator chip U2. One end of the output filter unit 32 is connected to the output terminal of the voltage regulator chip U2, and the other end is connected to the ground terminal of the voltage regulator chip U2. The output terminal of the voltage regulator chip U2 is also connected to the switching voltage regulation module 4 and the main control module 5.

[0029] In this example, the iron-core inductor T1 is used for filtering. Capacitor CE1 is a polarized capacitor used for energy storage. Resistor R4 is used for voltage division, diode D2 for reverse polarity protection, and capacitor C4 for filtering. In actual use, the stable electrical signal output by chip U1 is divided by resistor R4, then passed through diode D4, and finally filtered by capacitor C4 before being input to the input terminal of voltage regulator chip U2. Capacitor CE1 stores energy; when the voltage in the circuit is unstable, capacitor CE1 discharges, providing a stable input electrical signal for voltage regulator chip U2. Voltage regulator chip U2 is used to step down the input electrical signal to a stable +5V output, providing a stable power supply voltage for the main control module 5. In this example, the output filtering unit 32 includes capacitor C3, one end of which is connected to the ground terminal of voltage regulator chip U2, and the other end is connected to the output terminal of voltage regulator chip U2.

[0030] The main control module 5 includes a main control chip U3, which is an analog signal to PWM signal conversion chip. Preferably, the main control chip U3 is model GP9105. The main control chip U3 has pins one through eight. Pin three of the main control chip U3 is connected to the output of the voltage regulator module 3 and the switching voltage regulator module 4, respectively. Pin five of the main control chip U3 is connected to the V- terminal. It should be noted that the V- terminal is the negative terminal of the adjustable color temperature LED plug-in lamp driver circuit. Pin six of the main control chip U3 is connected to one set of light-emitting units, and pin seven is connected to the other set of light-emitting units. Pin five of the main control chip U3 is connected to the +5V power supply. Based on the input voltage signal, the main control chip U3 outputs complementary PWM signals on pins six and seven, and changes the duty cycle of the PWM signals output on pins six and seven according to different input signals, thereby controlling the brightness of the two sets of light-emitting units and thus changing the color temperature of the light-emitting module 6.

[0031] The light-emitting module 6 includes a first light-emitting unit 61 and a second light-emitting unit 62. The first light-emitting unit 61 includes a first light-emitting component 611 and a MOSFET Q2. The gate of the MOSFET Q2 is connected to the main control module 5, the source of the MOSFET Q2 is connected to the V- terminal, the drain of the MOSFET Q2 is connected to one end of the first light-emitting component 611, and the other end of the first light-emitting component 611 is connected to a first power supply voltage. The second light-emitting unit 62 includes a second light-emitting component 621 and a MOSFET Q3. The gate of the MOSFET Q3 is connected to the main control module 5, the source of the MOSFET Q3 is connected to the V- terminal, the drain of the MOSFET Q3 is connected to one end of the second light-emitting component 621, and the other end of the second light-emitting component 621 is connected to the first power supply voltage.

[0032] MOSFETs Q2 and Q3 receive PWM signals from the main control module 5 and switch their on / off states according to the PWM signals. MOSFET Q2 is connected to the first light-emitting component 611. By changing its on / off state, MOSFET Q2 controls the current flowing through the first light-emitting component 611, thereby changing the light emission state of the first light-emitting component 611. MOSFET Q3 controls the current flowing through the second light-emitting component 621 by changing its own on / off state. It should be noted that the color temperatures of the two sets of first light-emitting components 611 and second light-emitting components 621 are different. The main control module 5 sends complementary PWM signals to the first and second light-emitting components 621. By changing the duty cycle of the two sets of PWM signals, the first and second light-emitting components 621 adjust their own light emission intensity, thus changing the color temperature of the mixed light of the light-emitting module 6. In this way, the color temperature of the light-emitting module 6 can be adjusted according to the PWM signals sent by the main control module 5, allowing the color temperature of the mixed light of the light-emitting module 6 to be adjusted according to actual usage requirements.

[0033] Furthermore, the first light-emitting component 611 includes two sets of first light-emitting elements 6111 connected in parallel, each set of first light-emitting elements 6111 including multiple first light-emitting diodes 61111 connected in series. After the multiple first light-emitting diodes 61111 are connected in series, their anodes are connected to a +35V first power supply voltage, and their cathodes are connected to the drain of the switching transistor Q2. The color temperature of the first light-emitting diodes 61111 is 5K. The second light-emitting component 621 includes two sets of second light-emitting elements 6211 connected in parallel, each set of second light-emitting elements 6211 including multiple second light-emitting diodes 62111 connected in series. After the multiple second light-emitting diodes 62111 are connected in series, their anodes are connected to a +35V first power supply voltage, and their cathodes are connected to the drain of the switching transistor Q3. The color temperature of the second light-emitting diodes 62111 is 3K.

[0034] Furthermore, the light-emitting module 6 also includes a first current-limiting resistor 63 and a second current-limiting resistor 64. One end of the first current-limiting resistor 63 is connected to the main control module 5, and the other end is connected to the gate of the MOSFET Q2. One end of the second current-limiting resistor 64 is connected to the main control module 5, and the other end is connected to the gate of the MOSFET Q3.

[0035] The switching voltage regulation module 4 includes a toggle switch SW1, a first voltage divider unit 41, and a second voltage divider unit 42. The toggle switch SW1 has pins 1 through 10. Pins 1 and 10 of the toggle switch SW1 are connected to the input terminal of the main control module 5 and the output terminal of the voltage regulator module 3. Pins 2 and 9 of the toggle switch SW1 are connected to one end of the first voltage divider unit 41, and the other end of the first voltage divider unit 41 is connected to the output terminal of the voltage regulator module 3 and the input terminal of the main control module 5. Pins 3 and 8 of the toggle switch SW1 are connected to the V- terminal. Pins 4 and 7 of the toggle switch SW1 are connected to one end of the second voltage divider unit 42, and the other end of the second voltage divider unit 42 is connected to the output terminals of the first voltage divider unit 41 and the voltage regulator unit, respectively. Pins 5 and 6 of the toggle switch SW1 are connected together.

[0036] In practical use, by selecting and connecting the pins of the toggle switch SW1, the conduction states of the first voltage divider unit 41 and the second voltage divider unit 42 are changed, thereby altering the resistance value of the switching voltage regulation module 4 and thus changing the voltage value input to the main control module 5. For example, when the first and tenth pins of the toggle switch SW1 are conducting, the first voltage divider unit 41 and the second voltage divider unit 42 are not conducting, and the switching voltage regulation module 4 does not divide the second power supply voltage. The main control module 5 receives the second power supply voltage and outputs a PWM signal with a duty cycle of 1:0. At this time, the overall color temperature of the light-emitting component is 5K. Thus, by controlling the toggle switch SW1, the connection states of the first voltage divider unit 41 and the second voltage divider unit 42 are changed, thereby altering the voltage division of the second power supply voltage. This changes the input voltage of the main control module 5, thereby changing the duty cycle of the PWM signal output by the main control module 5, resulting in a change in the color temperature of the light-emitting module 6. It should be noted that the duty cycle of the PWM signal output by the main control module 5 can be set according to usage requirements.

[0037] The first voltage divider unit 41 includes resistors R7 and R8. One end of resistor R7 is connected to the ninth pin of the toggle switch SW1, and the other end is connected to the output terminal of the voltage regulator module 3 and the input terminal of the main control module 5, respectively. Resistor R8 is connected in parallel with resistor R7.

[0038] The second voltage divider unit 42 includes resistor 9 and resistor R10. One end of resistor R9 is connected to the seventh pin of the toggle switch SW1, and the other end is connected to the output terminal of the voltage regulator module 3 and the input terminal of the main control module 5. Resistors R10 and R9 are connected in parallel.

[0039] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A driving circuit of a color temperature tunable LED plug-in lamp, characterized in that, It includes: Rectifier module (1), constant current drive module (2), voltage stabilizing module (3), switch voltage regulating module (4), main control module (5) and light emitting module (6); the input end of the rectifier module (1) is connected with an AC power supply, the output end of the rectifier module (1) is connected with the input end of the constant current drive module (2), the output end of the constant current drive module (2) is connected with the input end of the voltage stabilizing module (3), the output end of the voltage stabilizing module (3) is connected with the switch voltage regulating module (4), the switch voltage regulating module (4) is connected with the main control module (5), and the main control module (5) is connected with the light emitting module (6); the rectifier module (1) is used for converting an AC power supply into a DC power supply, the constant current drive module (2) receives the DC power supply output by the rectifier module (1) and forms a first power supply voltage output by voltage reduction, the voltage stabilizing module (3) converts the electric signal output by the constant current drive module (2) into a stable second power supply voltage, the switch voltage regulating module (4) is used for adjusting the size of the second power supply voltage output by the voltage stabilizing module (3), and the main control module (5) outputs a PWM signal to the light emitting module (6) according to the second power supply voltage.

2. The driving circuit of a color temperature tunable LED plug-in lamp according to claim 1, characterized in that, It also includes a protection module (7), the protection module (7) includes an overcurrent protection unit (71) and an overvoltage protection unit (72); the rectifier module (1) includes a rectifier bridge DB1, the rectifier bridge DB1 has a first input end, a second input end, an output end and a ground end; one end of the overcurrent protection unit (71) is connected with a live wire L of an AC power supply, the other end thereof is respectively connected with one end of the overvoltage protection unit (72) and the second input end of the rectifier bridge DB1, and the other end of the overvoltage protection unit (72) is respectively connected with a neutral wire N of the AC power supply and the first input end of the rectifier bridge DB1.

3. The driving circuit of a color temperature tunable LED plug-in lamp according to claim 1, characterized in that, The constant current drive module (2) includes a chip U1, a capacitor CB1 and a diode D1, the chip U1 has a first pin to an eighth pin, the first pin, the second pin and the eighth pin of the chip U1 are grounded, and the fourth pin of the chip U1 is connected with the output end of the rectifier module (1); the positive electrode of the diode D1 is connected with the fifth pin of the chip U1, and the negative electrode thereof is respectively connected with the output end of the rectifier module (1) and the input end of the voltage stabilizing module (3).

4. The driving circuit of a color temperature tunable LED plug-in lamp according to claim 3, characterized in that, The voltage stabilizing module (3) comprises a voltage stabilizing filter unit (31), a voltage stabilizing chip U2 and an output filter unit (32); the voltage stabilizing filter unit (31) comprises a core inductor T1, a capacitor CE1, a resistor R4, a diode D2 and a capacitor C4, one end of the core inductor T1 is connected with the fifth pin of the chip U1 and the anode of the diode D1 respectively, the other end thereof is connected with one end of the capacitor CE1, one end of the resistor R4 and the ground terminal of the voltage stabilizing chip U2 respectively, the other end of the capacitor CE1 is connected with the cathode of the diode D1, the fourth pin of the chip U1, the other end of the resistor R4 and the anode of the diode D2 respectively; the cathode of the diode D2 is connected with the capacitor C4 and the input terminal of the voltage stabilizing chip U2 respectively, the other end of the capacitor C4 is connected with the ground terminal of the voltage stabilizing chip U2; one end of the output filter unit (32) is connected with the output terminal of the voltage stabilizing chip U2, and the other end thereof is connected with the ground terminal of the voltage stabilizing chip U2.

5. The driving circuit of a color temperature adjustable LED plug-in lamp according to claim 1, characterized in that, The switch voltage regulating module (4) comprises a toggle switch SW1, a first voltage dividing unit (41) and a second voltage dividing unit (42), the toggle switch SW1 has first to tenth pins, the first pin and the tenth pin of the toggle switch SW1 are connected with the input terminal of the main control module (5) and the output terminal of the voltage stabilizing module (3) respectively, the second pin and the ninth pin of the toggle switch SW1 are commonly connected with one end of the first voltage dividing unit (41), the other end of the first voltage dividing unit (41) is connected with the output terminal of the voltage stabilizing module (3) and the input terminal of the main control module (5) respectively; the third pin and the eighth pin of the toggle switch SW1 are connected with V-, the fourth pin and the seventh pin of the toggle switch SW1 are commonly connected with one end of the second voltage dividing unit (42), the other end of the second voltage dividing unit (42) is connected with the first voltage dividing unit (41) and the output terminal of the voltage stabilizing module (3) respectively; the fifth pin and the sixth pin of the toggle switch SW1 are connected.

6. The driving circuit of a color temperature adjustable LED plug-in lamp according to claim 1, characterized in that, The light emitting module (6) comprises a first light emitting unit (61) and a second light emitting unit (62), the first light emitting unit (61) comprises a first light emitting component (611) and a MOS tube Q2, the gate of the MOS tube Q2 is connected with the main control module (5), the source of the MOS tube Q2 is connected with V-, the drain of the MOS tube Q2 is connected with one end of the first light emitting unit (61), and the other end of the first light emitting unit (61) is connected with a first power supply voltage; the second light emitting unit (62) comprises a second light emitting component (621) and a MOS tube Q3, the gate of the MOS tube Q3 is connected with the main control module (5), the source of the MOS tube Q3 is connected with V-, the drain of the MOS tube Q3 is connected with one end of the second light emitting component (621), and the other end of the second light emitting component (621) is connected with the first power supply voltage.

7. The driving circuit of a color temperature tunable LED plug-in lamp according to claim 6, characterized in that, The light-emitting module (6) further comprises a first current-limiting resistor (63) and a second current-limiting resistor (64), one end of the first current-limiting resistor (63) is connected to the main control module (5), and the other end is connected to the gate of the MOS tube Q2; one end of the second current-limiting resistor (64) is connected to the main control module (5), and the other end is connected to the gate of the MOS tube Q3.

8. The driving circuit of a color temperature adjustable LED plug-in lamp according to claim 5, characterized in that, The first voltage dividing unit (41) comprises a resistor R7 and a resistor R8, one end of the resistor R7 is connected to the ninth pin of the toggle switch SW1, and the other end is respectively connected to the output end of the voltage stabilizing module (3) and the input end of the main control module (5), and the resistor R8 is connected in parallel with the resistor R7.

9. The driving circuit of a color temperature adjustable LED plug-in lamp according to claim 5, characterized in that, The second voltage dividing unit (42) comprises a resistor R9 and a resistor R10, one end of the resistor R9 is connected to the seventh pin of the toggle switch SW1, and the other end is respectively connected to the output end of the voltage stabilizing module (3) and the input end of the main control module (5), and the resistor R10 is connected in parallel with the resistor R9.

10. A tunable color temperature LED plug-in lamp, characterized in that The adjustable color temperature LED plug-in lamp driving circuit comprises the adjustable color temperature LED plug-in lamp driving circuit according to any one of claims 1-9.

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