LED driving power supply based on microwave induction and lighting equipment

Abstract

The utility model discloses an LED driving power supply based on microwave induction and a lighting device. The LED driving power supply comprises a half-bridge resonant conversion module, a step-down constant current module, an auxiliary power supply and a microwave control module. The half-bridge resonant conversion module is used for converting commercial power into direct-current voltage to supply power to the step-down constant-current module and the auxiliary power supply respectively; the step-down constant current module is used for providing constant working current for the LED light source and adjusting the constant working current; the microwave control module is used for detecting the lighting environment state and outputting a control signal according to a detection signal to control the working state of the step-down constant-current module; the auxiliary power supply is used for supplying power to the microwave control module. According to the utility model, multi-gear current regulation can be realized, so that appropriate illumination brightness is obtained, and the LED light source can be controlled to be turned on or turned off, so that illumination equipment can be controlled not to work under the condition that illumination is not needed, and the purpose of saving energy is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of LED driving, and particularly relates to an LED driving power supply and a lighting device based on microwave induction. Background Art

[0002] At present, due to the lighting requirements in different environments, the existing driving power supply can obtain appropriate lighting brightness by outputting different currents. By this means, the demand for various driving power supplies with different powers is reduced, which brings great convenience and certain economy. However, in some usage environments, it is not required that the driving power supply always works, that is, the lighting function is not always used. If the lighting device always works in the case where lighting is not required, it will cause waste of electric energy.

[0003] Therefore, the existing technology still needs to be improved and developed. Summary of the Utility Model

[0004] In view of the above deficiencies of the existing technology, the purpose of the utility model is to provide an LED driving power supply and a lighting device based on microwave induction to solve the problem of waste of electric energy caused by the existing lighting device always being in a working state.

[0005] The technical solution of the utility model is as follows:

[0006] An LED driving power supply based on microwave induction, which includes: a half-bridge resonant conversion module, a buck constant-current module, an auxiliary power supply and a microwave control module; wherein,

[0007] The half-bridge resonant conversion module is respectively connected to the buck constant-current module and the auxiliary power supply, and the half-bridge resonant conversion module is used to convert the commercial power into a DC voltage to supply power to the buck constant-current module and the auxiliary power supply respectively;

[0008] The buck constant-current module is connected to the half-bridge resonant conversion module, and the buck constant-current module is used to provide a constant working current for the LED light source and adjust the constant working current;

[0009] The microwave control module is connected to the buck constant-current module, and the microwave control module is used to detect the lighting environment state and output a control signal according to the detection signal to control the working state of the buck constant-current module;

[0010] The auxiliary power supply is respectively connected to the half-bridge resonant conversion module and the microwave control module, and the auxiliary power supply is used to supply power to the microwave control module.

[0011] A further arrangement of the present utility model, the buck constant current module includes: a buck constant current driving chip, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a first switch, a second switch, a third switch, a first diode, a first inductor, a first capacitor and a second capacitor; wherein,

[0012] One end of the first resistor is connected to the seventh pin of the buck constant current driving chip, the other end of the first resistor is connected to one end of the second resistor, and the other end of the second resistor is connected to the secondary side ground;

[0013] One end of the third resistor is connected to one end of the fourth resistor, the other end of the third resistor is connected to the secondary side ground, one end of the fourth resistor is also connected to the sixth pin of the buck constant current driving chip, and the other end of the fourth resistor is connected to the output end of the microwave control module;

[0014] One end of the fifth resistor is connected to one end of the first switch, the other end of the fifth resistor is connected to the secondary side ground, the other end of the first switch is connected to the eighth pin of the buck constant current driving chip, and the sixth resistor is connected in parallel with the fifth resistor;

[0015] One end of the seventh resistor is connected to one end of the second switch, the other end of the seventh resistor is connected to the secondary side ground, the other end of the second switch is connected to the eighth pin of the buck constant current driving chip, and the eighth resistor is connected in parallel with the seventh resistor;

[0016] One end of the ninth resistor is connected to one end of the third switch, the other end of the ninth resistor is connected to the secondary side ground, the other end of the third switch is connected to the eighth pin of the buck constant current driving chip, and the tenth resistor is connected in parallel with the ninth resistor;

[0017] One end of the eleventh resistor is connected to one end of the twelfth resistor, the other end of the eleventh resistor and the other end of the twelfth resistor are connected to the third pin of the buck constant current driving chip; the third pin of the buck constant current driving chip is also connected to the LED light source;

[0018] The anode of the first diode is connected to the first pin of the buck constant current driving chip and one end of the first inductor, the cathode of the first diode is connected to the output end of the half-bridge resonance conversion module, and the other end of the first inductor is connected to the LED light source;

[0019] One end of the first capacitor is connected to the fifth pin of the buck constant current driving chip, and the other end of the first capacitor is connected to the secondary side ground;

[0020] One end of the second capacitor is connected to the LED light source, and the other end of the second capacitor is connected to the output end of the half-bridge resonant conversion module.

[0021] In a further setting of the present utility model, the auxiliary power supply includes: a step-down constant-voltage drive chip, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a second diode, a second inductor, a third capacitor, and a fourth capacitor; wherein,

[0022] One end of the thirteenth resistor is connected to the fourth pin of the step-down constant-voltage drive chip, and the other end of the thirteenth resistor is connected to the output end of the half-bridge resonant conversion module;

[0023] One end of the fourteenth resistor is connected to the sixth pin of the step-down constant-voltage drive chip, and the other end of the fourteenth resistor is connected to one end of the fourth capacitor;

[0024] One end of the third capacitor is connected to the first pin of the step-down constant-voltage drive chip, the other end of the third capacitor is connected to one end of the second inductor and the cathode of the second diode, the other end of the second inductor is connected to one end of the fourth capacitor, the other end of the fourth capacitor is connected to the secondary side ground, and one end of the fourth capacitor is also connected to the power supply end of the microwave control module;

[0025] The fifteenth resistor is connected in parallel with the fourth capacitor;

[0026] The anode of the second diode is connected to the secondary side ground.

[0027] In a further setting of the present utility model, the half-bridge resonant conversion module includes: an EMI filtering unit, a power factor correction unit, a first transformer unit, a second transformer unit, a half-bridge conversion unit, and an output voltage control unit; wherein,

[0028] The EMI filtering unit is connected to the power factor correction unit, and the EMI filtering unit is used to filter the mains power;

[0029] The power factor correction unit is respectively connected to the half-bridge conversion unit and the output voltage control unit, and the power factor correction unit is used to adjust the magnitude of the power factor;

[0030] The half-bridge conversion unit is connected to the first transformer unit, and the half-bridge conversion unit is used to convert the DC voltage output by the power factor correction unit into an AC voltage;

[0031] The first transformer unit is connected to the second transformer unit, and the second transformer unit is used to step down and rectify the AC voltage output by the half-bridge conversion unit and then output a DC voltage;

[0032] The output voltage control unit is respectively connected to the first transformer unit, the second transformer unit, and the output end of the half-bridge resonant conversion module. The output voltage control unit is used to excite the first transformer unit to operate in the first two cycles, and to control the output voltage and achieve overcurrent protection.

[0033] In a further arrangement of the present utility model, the EMI filtering unit includes: a fuse, a varistor, a common mode inductor, a third inductor, a fifth capacitor, and a sixth capacitor; wherein,

[0034] One end of the varistor is connected to the fuse, and the other end of the varistor is used for connection to the neutral line;

[0035] The fifth capacitor is connected in parallel with the varistor;

[0036] The first input terminal and the second input terminal of the common mode inductor are respectively connected to both ends of the fifth capacitor. The first output terminal of the common mode inductor is connected to one end of the third inductor, the second output terminal of the common mode inductor is connected to one end of the sixth capacitor, and the other end of the sixth capacitor is connected to the other end of the third inductor.

[0037] In a further arrangement of the present utility model, the power factor correction unit includes: a third diode, a fourth diode, a fifth diode, a sixth diode, a seventh diode, a seventh capacitor, an eighth capacitor, a ninth capacitor, and a tenth capacitor; wherein,

[0038] The common connection end of the anode of the third diode and the cathode of the fourth diode is connected to the other end of the sixth capacitor. The cathode of the third diode is connected to the cathode of the fourth diode and one end of the tenth capacitor. The anode of the fourth diode is connected to one end of the eighth capacitor, and the common connection end of the anode of the sixth diode and the cathode of the seventh diode is connected;

[0039] The common connection end of the anode of the fifth diode and the cathode of the sixth diode is connected to one end of the sixth capacitor;

[0040] The anode of the seventh diode is connected to the other end of the tenth capacitor;

[0041] One end of the seventh capacitor is connected to the other end of the sixth capacitor, and the other end of the seventh capacitor is connected to the primary side ground;

[0042] One end of the eighth capacitor is connected to the anode of the fourth diode, and the other end of the eighth capacitor is connected to the primary side ground;

[0043] The ninth capacitor is connected in parallel with the seventh diode.

[0044] Further setting of the present utility model, the first transformer unit includes a first transformer; the half-bridge conversion unit includes: a sixteenth resistor, a seventeenth resistor, a first triode, a second triode, an eighth diode, a ninth diode and an eleventh capacitor; wherein,

[0045] One end of the sixteenth resistor is connected to one end of the first winding of the first transformer, and the other end of the sixteenth resistor is connected to the base of the first triode;

[0046] One end of the seventeenth resistor is connected to one end of the second winding of the first transformer, and the other end of the seventeenth resistor is connected to the base of the second triode;

[0047] The collector of the first triode is connected to one end of the tenth capacitor, and the emitter of the first triode is connected to the other end of the first winding of the first transformer and the common connection end of the eighth diode and the ninth diode;

[0048] The emitter of the second triode is connected to the other end of the tenth capacitor;

[0049] The eleventh capacitor is connected in parallel with the ninth diode;

[0050] The cathode of the eighth diode is connected to one end of the tenth capacitor, the anode of the eighth diode is connected to the cathode of the ninth diode, the anode of the ninth diode is connected to the other end of the tenth capacitor, and the common connection end of the eighth diode and the ninth diode is connected to one end of the third winding of the first transformer.

[0051] Further setting of the present utility model, the second transformer unit includes: a second transformer, a fourth inductor, a twelfth diode, an eleventh diode, a twelfth capacitor and a thirteenth capacitor; wherein,

[0052] One end of the fourth inductor is connected to the other end of the third winding of the first transformer, and the other end of the fourth inductor is connected to the first primary winding of the second transformer;

[0053] The anode of the twelfth diode is connected to the first secondary winding of the second transformer, and the cathode of the twelfth diode is connected to one end of the thirteenth capacitor;

[0054] The anode of the eleventh diode is connected to the second secondary winding of the second transformer, the cathode of the eleventh diode is connected to one end of the thirteenth capacitor, and the other end of the thirteenth capacitor is connected to the secondary side ground;

[0055] One end of the twelfth capacitor is connected to the first primary winding of the second transformer, and the other end of the twelfth capacitor is connected to the primary side ground.

[0056] For a further arrangement of the present utility model, the output voltage control unit includes: an output voltage control chip, an eighteenth resistor, a nineteenth resistor, a twentieth resistor, a twenty-first resistor, a twenty-second resistor, a twenty-third resistor, a twenty-fourth resistor, a twenty-fifth resistor, a twenty-sixth resistor, a twenty-seventh resistor, a twenty-eighth resistor, a twenty-ninth resistor, a thirtieth resistor, a thirty-first resistor, a thirty-second resistor, a thirty-third resistor, a thirty-fourth resistor, a thirty-fifth resistor, a twelfth diode, a thirty-sixth resistor, a thirty-seventh resistor, a thirteenth diode, a fourteenth diode, a fourteenth capacitor, a fifteenth capacitor, a sixteenth capacitor, a seventeenth capacitor, an optocoupler and a voltage regulator; wherein,

[0057] One end of the eighteenth resistor is connected to the other end of the tenth capacitor, the other end of the eighteenth resistor is connected to one end of the nineteenth resistor, the other end of the nineteenth resistor is connected to one end of the twentieth resistor, and the other end of the twentieth resistor is connected to one end of the twenty-first resistor;

[0058] The twenty-second resistor is in parallel with the twenty-first resistor, the twenty-third resistor is in parallel with the twenty-second resistor, and one end of the twenty-third resistor is connected to the first primary winding of the second transformer;

[0059] The other end of the twenty-first resistor is connected to one end of the twenty-fourth resistor, and the other end of the twenty-fourth resistor is connected to the third pin of the output voltage control chip;

[0060] The twenty-fifth resistor is connected to one end of the tenth capacitor, and the twenty-fifth resistor, the twenty-sixth resistor and the twenty-seventh resistor are sequentially connected in series and then connected to the first pin of the output voltage control chip;

[0061] One end of the fourteenth capacitor is connected to the first pin of the output voltage control chip, and the other end of the fourteenth capacitor is connected to the primary side ground;

[0062] The anode of the twelfth diode is connected to the second primary winding of the second transformer, the cathode of the twelfth diode is connected to one end of the fifteenth capacitor, and the other end of the fifteenth capacitor is connected to the primary side ground;

[0063] The anode of the thirteenth diode is connected to the second primary winding of the second transformer, the cathode of the thirteenth diode is connected to one end of the twenty-eighth resistor, the other end of the twenty-eighth resistor is connected to one end of the twenty-ninth resistor, the other end of the twenty-ninth resistor is connected to the primary side ground, and the common connection end of the twenty-eighth resistor and the twenty-ninth resistor is connected to the first pin of the output voltage control chip;

[0064] One end of the thirtieth resistor is connected to the output end of the half-bridge resonant conversion module, the other end of the thirtieth resistor is connected to one end of the thirty-first resistor, the other end of the thirty-first resistor is connected to one end of the thirty-second resistor, and the other end of the thirty-second resistor is connected to the secondary side ground;

[0065] The sixteenth capacitor is connected in parallel with the thirtieth resistor;

[0066] One end of the thirty-third resistor is connected to the common connection end of the thirty-first resistor and the thirty-second resistor, the other end of the thirty-third resistor is connected to one end of the seventeenth capacitor, and the other end of the seventeenth capacitor is respectively connected to one end of the thirty-fourth resistor, one end of the thirty-fifth resistor, and the cathode of the voltage regulator;

[0067] The anode of the voltage regulator is connected to the secondary side ground, and the control end of the voltage regulator is connected to the common connection end of the thirty-first resistor and the thirty-second resistor;

[0068] The other end of the thirty-fourth resistor is connected to the anode of the optocoupler, and the cathode of the fourteenth diode is connected to one end of the sixteenth capacitor;

[0069] The other end of the thirty-fifth resistor is connected to the cathode of the optocoupler, and the anode of the fourteenth diode is connected to the anode of the optocoupler;

[0070] The thirty-sixth resistor is connected in parallel with the collector and emitter of the optocoupler;

[0071] One end of the thirty-seventh resistor is connected to the emitter of the optocoupler, and the other end of the thirty-seventh resistor is connected to the fourth pin of the output voltage control chip;

[0072] The output voltage control chip is used to adjust the primary side current according to the voltage signals of the twenty-first resistor, the twenty-second resistor, and the twenty-third resistor, and is used to compare the voltage signal collected from the secondary side of the optocoupler with the internal reference voltage to adjust and control the output voltage.

[0073] A lighting device, which includes the microwave induction-based LED drive power supply as described above.

[0074] A kind of LED driving power supply and lighting device based on microwave induction provided by the present utility model, the LED driving power supply includes: a half-bridge resonant conversion module, a buck constant current module, an auxiliary power supply and a microwave control module; the half-bridge resonant conversion module is used to convert the commercial power into a DC voltage to supply power to the buck constant current module and the auxiliary power supply respectively; the buck constant current module is used to provide a constant working current for the LED light source and adjust the constant working current; the microwave control module is used to detect the lighting environment state and output a control signal according to the detection signal to control the working state of the buck constant current module; the auxiliary power supply is used to supply power to the microwave control module. By adjusting the constant working current of the LED light source through the buck constant current module, the present utility model can realize multi-level current adjustment, so as to obtain a suitable lighting brightness, and adopt the microwave control module to detect the lighting demand, and can output a control signal to control the on or off of the LED light source, so that it can be realized that the lighting device does not work in the case of no need for lighting, achieving the purpose of saving energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0075] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the structures shown in these drawings.

[0076] Figure 1 It is a principle block diagram of the LED driving power supply based on microwave induction in the present utility model.

[0077] Figure 2 It is a circuit schematic diagram of the LED driving power supply based on microwave induction in the present utility model.

[0078] Marks in the drawings: 100, half-bridge resonant conversion module; 110, EMI filtering unit; 120, power factor correction unit; 130, first transformer unit; 140, second transformer unit; 150, half-bridge conversion unit; 160, output voltage control unit; 200, buck constant current module; 300, auxiliary power supply; 400, microwave control module. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0079] The present utility model provides an LED driving power supply and a lighting device based on microwave induction. To make the purpose, technical solutions and effects of the present utility model clearer and more definite, the following will further describe the present utility model in detail with reference to the drawings and by way of examples. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0080] In the embodiments and the scope of the patent application, unless otherwise specifically defined in the text for articles, the articles "a", "an", "the", and "said" may also include plural forms. If there are descriptions involving "first", "second", etc. in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second" may explicitly or implicitly include at least one such feature.

[0081] It should be further understood that the term "comprising" used in the description of the present utility model means the presence of the described features, integers, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or their groups. It should be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to other elements, or there may also be intermediate elements. In addition, the "connection" or "coupling" used herein may include wireless connection or wireless coupling. The phrase "and / or" used herein includes all or any unit and all combinations of one or more of the associated listed items.

[0082] Those skilled in the art of the present technology can understand that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as the general understanding of those of ordinary skill in the field to which the present utility model belongs. It should also be understood that terms such as those defined in a general dictionary should be understood to have a meaning consistent with the meaning in the context of the prior art, and will not be interpreted with an idealized or overly formal meaning unless specifically defined as here.

[0083] In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0084] Please also refer to Figures 1 to 2 , the present utility model provides a preferred embodiment of an LED driving power supply based on microwave induction.

[0085] As Figure 1As shown in the figure, the utility model provides an LED driving power supply based on microwave induction, which includes: a half-bridge resonant conversion module 100, a buck constant current module 200, an auxiliary power supply 300 and a microwave control module 400. Among them, the half-bridge resonant conversion module 100 is respectively connected to the buck constant current module 200 and the auxiliary power supply 300. The half-bridge resonant conversion module 100 is used to convert the mains power into a DC voltage to supply power to the buck constant current module 200 and the auxiliary power supply 300 respectively; the buck constant current module 200 is connected to the half-bridge resonant conversion module 100. The buck constant current module 200 is used to provide a constant working current for the LED light source and adjust the constant working current; the microwave control module 400 is connected to the buck constant current module 200. The microwave control module 400 is used to detect the lighting environment state and output a control signal according to the detection signal to control the working state of the buck constant current module 200; the auxiliary power supply 300 is respectively connected to the half-bridge resonant conversion module 100 and the microwave control module 400. The auxiliary power supply 300 is used to supply power to the microwave control module 400.

[0086] Specifically, the half-bridge resonant conversion module 100 can convert alternating current (mains power) into a suitable constant DC voltage to supply power to the subsequent circuit. The microwave control module 400 has a power supply pin, a ground pin, an output pin and an antenna. The working principle of the microwave control module 400 is as follows: after being powered on, the antenna emits microwave signals outward. When a moving object is detected, the frequency of the reflected microwave changes and is received by the antenna, and is converted into an electrical signal for the single-chip microcomputer to process to achieve the detection purpose. When the microwave control module 400 detects that no one passes by, it outputs a control signal to the buck constant current module 200, so that the buck constant current module 200 stops outputting current, so that the LED light source does not work. When it detects that someone passes by, it outputs a control signal to the buck constant current module 200, so that the buck constant current module 200 outputs current to drive the LED light source to work. Among them, the control signals output by the microwave control module 400 include PWM signals, high-level signals and low-level signals. Among them, the PWM signals can adjust the output current, and the high-level signals and low-level signals can control the on or off of the LED light source. When the buck constant current module 200 drives the LED light source to work, it can adjust the output current to adjust the brightness of the LED light source. The auxiliary power supply 300 module can provide a suitable and stable power supply for the microwave control module 400 to ensure that the microwave control module 400 can work stably.

[0087] It can be seen that the utility model adjusts the constant working current of the LED light source through the step-down constant current module 200, which can achieve multi-level current adjustment, so as to obtain appropriate illumination brightness. The microwave control module 400 is used to detect the lighting demand and can output a control signal to control the on or off of the LED light source. Therefore, it can be realized that the lighting device does not work in the case of no need for lighting, meeting the lighting requirements of users in different environments and achieving the optimal energy-saving purpose of turning on the light when people come and turning off the light when people leave.

[0088] In some embodiments, such as Figure 1 and Figure 2As shown in the figure, the buck constant current module 200 includes: a buck constant current driving chip IC1, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a first switch K1, a second switch K2, a third switch K3, a first diode D1, a first inductor L1, a first capacitor C1, and a second capacitor C2. Among them, one end of the first resistor R1 is connected to the seventh pin of the buck constant current driving chip IC1, the other end of the first resistor R1 is connected to one end of the second resistor R2, and the other end of the second resistor R2 is connected to the secondary side ground; one end of the third resistor R3 is connected to one end of the fourth resistor R4, the other end of the third resistor R3 is connected to the secondary side ground, one end of the fourth resistor R4 is also connected to the sixth pin of the buck constant current driving chip IC1, and the other end of the fourth resistor R4 is connected to the output end of the microwave control module 400; one end of the fifth resistor R5 is connected to one end of the first switch K1, the other end of the fifth resistor R5 is connected to the secondary side ground, the other end of the first switch K1 is connected to the eighth pin of the buck constant current driving chip IC1, and the sixth resistor R6 is connected in parallel with the fifth resistor R5; one end of the seventh resistor R7 is connected to one end of the second switch K2, the other end of the seventh resistor R7 is connected to the secondary side ground, the other end of the second switch K2 is connected to the eighth pin of the buck constant current driving chip IC1, and the eighth resistor R8 is connected in parallel with the seventh resistor R7; one end of the ninth resistor R9 is connected to one end of the third switch K3, the other end of the ninth resistor R9 is connected to the secondary side ground, the other end of the third switch K3 is connected to the eighth pin of the buck constant current driving chip IC1, and the tenth resistor R10 is connected in parallel with the ninth resistor R9; one end of the eleventh resistor R11 is connected to one end of the twelfth resistor R12, and the other end of the eleventh resistor R11 and the other end of the twelfth resistor R12 are connected to the third pin of the buck constant current driving chip IC1; the third pin of the buck constant current driving chip IC1 is also connected to the LED light source; the anode of the first diode D1 is connected to the first pin of the buck constant current driving chip IC1 and one end of the first inductor L1, the cathode of the first diode D1 is connected to the output end of the half-bridge resonant conversion module 100, and the other end of the first inductor L1 is connected to the LED light source; one end of the first capacitor C1 is connected to the fifth pin of the buck constant current driving chip IC1, and the other end of the first capacitor C1 is connected to the secondary side ground; one end of the second capacitor C2 is connected to the LED light source, and the other end of the second capacitor C2 is connected to the output end of the half-bridge resonant conversion module 100.

[0089] Specifically, the seventh pin of the buck constant-current driving chip IC1 is the output terminal of the internal 5V reference power supply, and the eighth pin is the linear dimming pin. Among them, the 5V reference power supply sets the voltage for the eighth pin through the first resistor R1 and the second resistor R2. By adjusting the voltage of the eighth pin, different output currents can be set. The specific setting method can be to connect or disconnect the fifth resistor R5, the sixth resistor R6, the seventh resistor R7, the eighth resistor R8, the ninth resistor R9, and the tenth resistor R10 through the first switch K1, the second switch K2, and the third switch K3 for combination to adjust the voltage of the eighth pin, and 5-gear output current adjustment can be achieved. For example, the first switch K1, the second switch K2, and the third switch K3 are closed simultaneously. The third pin of the buck constant-current driving chip IC1 is the current sampling terminal, and the sampling voltage is 0.1V. By adjusting the magnitudes of the eleventh resistor R11 and the twelfth resistor R12, the output current can be set. The fourth pin of the buck constant-current driving chip IC1 is the power supply pin, and the power supply pin is connected to the output terminal of the half-bridge resonant conversion module 100, and the input voltage range is 6 - 60V. The fifth pin of the buck constant-current driving chip IC1 is the compensation pin, and the compensation loop is adjusted by externally connecting the first capacitor C1 to make the output current stable at the set current value. The first pin of the buck constant-current driving chip IC1 is the power output terminal, and the second pin of the buck constant-current driving chip IC1 is connected to the secondary side ground. In one implementation manner, the model of the buck constant-current driving chip IC1 can be SD42527.

[0090] In some embodiments, such as Figure 1 and Figure 2 shown, the auxiliary power supply 300 includes: a buck constant-voltage driving chip IC2, a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, a second diode D2, a second inductor L2, a third capacitor C3, and a fourth capacitor C4. Among them, one end of the thirteenth resistor R13 is connected to the fourth pin of the buck constant-voltage driving chip IC2, and the other end of the thirteenth resistor R13 is connected to the output terminal of the half-bridge resonant conversion module 100; one end of the fourteenth resistor R14 is connected to the sixth pin of the buck constant-voltage driving chip IC2, and the other end of the fourteenth resistor R14 is connected to one end of the fourth capacitor C4; one end of the third capacitor C3 is connected to the first pin of the buck constant-voltage driving chip IC2, and the other end of the third capacitor C3 is connected to one end of the second inductor L2 and the cathode of the second diode D2. The other end of the second inductor L2 is connected to one end of the fourth capacitor C4. The other end of the fourth capacitor C4 is connected to the primary side ground, and one end of the fourth capacitor C4 is also connected to the power supply terminal of the microwave control module 400; the fifteenth resistor R15 is connected in parallel with the fourth capacitor C4; the anode of the second diode D2 is connected to the secondary side ground.

[0091] Specifically, the first pin of the step-down constant-voltage driving chip IC2 is the power supply pin, and the fourth pin of the step-down constant-voltage driving chip IC2 has an internal transistor collector pin, which is connected to the output terminal of the half-bridge resonant conversion module 100 through the thirteenth resistor R13. After power-on, the internal circuit of the step-down constant-voltage driving chip IC2 charges the third capacitor C3. When the voltage reaches the turn-on threshold, the control circuit inside the step-down constant-voltage driving chip IC2 starts to work and charges the fourth capacitor C4. The voltage across the fourth capacitor C4 is the supply voltage of the microwave control module 400. The sixth pin of the step-down constant-voltage driving chip IC2 is the output voltage feedback input pin. The thirteenth resistor R13 and the internal resistor of the step-down constant-voltage driving chip IC2 (usually a fixed resistance of 12 KΩ) sample the output voltage and compare it with the internal threshold voltage to set the output voltage. Among them, the third pin and the fifth pin of the step-down constant-voltage driving chip IC2 are empty pins, and the second pin is the ground terminal. In one implementation, the model of the step-down constant-voltage driving chip IC2 can be WS7215.

[0092] In some embodiments, as Figure 1 shown in Figure 2 the half-bridge resonant conversion module 100 includes: an EMI filtering unit 110, a power factor correction unit 120, a first transformer unit 130, a second transformer unit 140, a half-bridge conversion unit 150, and an output voltage control unit 160. Among them, the EMI filtering unit 110 is connected to the power factor correction unit 120, and the EMI filtering unit 110 is used to filter the mains power; the power factor correction unit 120 is respectively connected to the half-bridge conversion unit 150 and the output voltage control unit 160, and the power factor correction unit 120 is used to adjust the size of the power factor; the half-bridge conversion unit 150 is connected to the first transformer unit 130, and the half-bridge conversion unit 150 is used to convert the DC voltage output by the power factor correction unit 120 into an AC voltage; the first transformer unit 130 is connected to the second transformer unit 140, and the second transformer unit 140 is used to step down and rectify the AC voltage output by the half-bridge conversion unit 150 and then output a DC voltage; the output voltage control unit 160 is respectively connected to the first transformer unit 130, the second transformer unit 140, and the output terminal of the half-bridge resonant conversion module 100. The output voltage control unit 160 is used to excite the first transformer unit 130 to work in the first two cycles, and is used to control the output voltage and achieve overcurrent protection.

[0093] In this embodiment, the EMI filtering unit 110 can perform filtering on the incoming mains power to prevent damage caused by surges. The power factor correction unit 120 can rectify the AC voltage output by the EMI filtering unit 110 and can adjust the power factor to reduce power supply losses. The half-bridge conversion unit 150 can convert the DC power output by the power factor correction unit 120 into an AC voltage and transmit it to the first transformer unit 130, and the first transformer unit 130 further transmits it to the second transformer unit 140. The second transformer unit 140 can step down the AC voltage and then rectify and output it. The output voltage control unit 160 can monitor the output voltage, adjust the magnitude of the output voltage, and can also adjust the current on the primary side to achieve overcurrent protection.

[0094] In some embodiments, such as Figure 1 With Figure 2 As shown, the EMI filtering unit 110 includes: a fuse FS, a varistor RV1, a common-mode inductor Lc, a third inductor L3, a fifth capacitor C5, and a sixth capacitor C6. Among them, one end of the varistor RV1 is connected to the fuse FS, and the other end of the varistor RV1 is used to connect to the neutral line; the fifth capacitor C5 is connected in parallel with the varistor RV1; the first input terminal and the second input terminal of the common-mode inductor Lc are respectively connected to both ends of the fifth capacitor C5. The first output terminal of the common-mode inductor Lc is connected to one end of the third inductor L3, the second output terminal of the common-mode inductor Lc is connected to one end of the sixth capacitor C6, and the other end of the sixth capacitor C6 is connected to the other end of the third inductor L3.

[0095] Specifically, the fuse FS and the varistor RV1 can prevent surge voltages, and the common-mode inductor Lc can filter out common-mode interference signals so that the incoming AC mains power is stably input to the subsequent circuit.

[0096] In some embodiments, such as Figure 2As shown, the power factor correction unit 120 includes: a third diode D3, a fourth diode D4, a fifth diode D5, a sixth diode D6, a seventh diode D7, a seventh capacitor C7, an eighth capacitor C8, a ninth capacitor C9, and a tenth capacitor C10. Among them, the common connection end of the anode of the third diode D3 and the cathode of the fourth diode D4 is connected to the other end of the sixth capacitor C6. The cathode of the third diode D3 is connected to the cathode of the fourth diode D4 and one end of the tenth capacitor C10. The anode of the fourth diode D4 is connected to one end of the eighth capacitor C8, and the common connection end of the anode of the sixth diode D6 and the cathode of the seventh diode D7 is connected; the anode of the fifth diode D5 is connected to the common connection end of the cathode of the sixth diode D6 and one end of the sixth capacitor C6; the anode of the seventh diode D7 is connected to the other end of the tenth capacitor C10; one end of the seventh capacitor C7 is connected to the other end of the sixth capacitor C6, and the other end of the seventh capacitor C7 is connected to the primary side ground; one end of the eighth capacitor C8 is connected to the anode of the fourth diode D4, and the other end of the eighth capacitor C8 is connected to the primary side ground; the ninth capacitor C9 is connected in parallel with the seventh diode D7.

[0097] Specifically, the third diode D3, the fourth diode D4, the fifth diode D5, the sixth diode D6, the seventh diode D7, the seventh capacitor C7, the eighth capacitor C8, the ninth capacitor C9, and the tenth capacitor C10 constitute the power factor correction unit 120, which can rectify the input AC mains power and adjust the power factor to reduce the power supply loss.

[0098] In some embodiments, such as Figure 1 and Figure 2As shown, the first transformer unit 130 includes a first transformer T1; the half-bridge conversion unit 150 includes: a sixteenth resistor R16, a seventeenth resistor R17, a first triode Q1, a second triode Q2, an eighth diode D8, a ninth diode D9, and an eleventh capacitor C11; wherein, one end of the sixteenth resistor R16 is connected to one end of the first winding a of the first transformer T1, and the other end of the sixteenth resistor R16 is connected to the base of the first triode Q1; one end of the seventeenth resistor R17 is connected to one end of the second winding b of the first transformer T1, and the other end of the seventeenth resistor R17 is connected to the base of the second triode Q2; the collector of the first triode Q1 is connected to one end of the tenth capacitor C10, and the emitter of the first triode Q1 is connected to the other end of the first winding a of the first transformer T1 and the common connection end of the eighth diode D8 and the ninth diode D9; the emitter of the second triode Q2 is connected to the other end of the tenth capacitor C10; the eleventh capacitor C11 is connected in parallel with the ninth diode D9; the cathode of the eighth diode D8 is connected to one end of the tenth capacitor C10, the anode of the eighth diode D8 is connected to the cathode of the ninth diode D9, the anode of the ninth diode D9 is connected to the other end of the tenth capacitor C10, and the common connection end of the eighth diode D8 and the ninth diode D9 is connected to one end of the third winding c of the first transformer T1.

[0099] Further, the second transformer unit 140 includes: a second transformer T2, a fourth inductor L4, a tenth diode D10, an eleventh diode D11, a twelfth capacitor C12, and a thirteenth capacitor C13. Wherein, one end of the fourth inductor L4 is connected to the other end of the third winding c of the first transformer T1, and the other end of the fourth inductor L4 is connected to the first primary winding e of the second transformer T2; the anode of the tenth diode D10 is connected to the first secondary winding g of the second transformer T2, and the cathode of the tenth diode D10 is connected to one end of the thirteenth capacitor C13; the anode of the eleventh diode D11 is connected to the second secondary winding h of the second transformer T2, and the cathode of the eleventh diode D11 is connected to one end of the thirteenth capacitor C13, and the other end of the thirteenth capacitor C13 is connected to the secondary side ground; one end of the twelfth capacitor C12 is connected to the first primary winding e of the second transformer T2, and the other end of the twelfth capacitor C12 is connected to the primary side ground.

[0100] Further, as Figure 1 and Figure 2As shown, the output voltage control unit 160 includes: an output voltage control chip IC3, an eighteenth resistor R18, a nineteenth resistor R19, a twentieth resistor R20, a twenty-first resistor R21, a twenty-second resistor R22, a twenty-third resistor R23, a twenty-fourth resistor R24, a twenty-fifth resistor R25, a twenty-sixth resistor R26, a twenty-seventh resistor R27, a twenty-eighth resistor R28, a twenty-ninth resistor R29, a thirtieth resistor R30, a thirty-first resistor R31, a thirty-second resistor R32, a thirty-third resistor R33, a thirty-fourth resistor R34, a thirty-fifth resistor R35, a thirty-sixth resistor R36, a thirty-seventh resistor R37, a twelfth diode D12, a thirteenth diode D13, a fourteenth diode D14, a fourteenth capacitor C14, a fifteenth capacitor C15, a sixteenth capacitor C16, a seventeenth capacitor C17, an optocoupler OC, and a voltage regulator S1. Among them, one end of the eighteenth resistor R18 is connected to the other end of the tenth capacitor C10, the other end of the eighteenth resistor R18 is connected to one end of the nineteenth resistor R19, the other end of the nineteenth resistor R19 is connected to one end of the twentieth resistor R20, and the other end of the twentieth resistor R20 is connected to one end of the twenty-first resistor R21; the twenty-second resistor R22 is in parallel with the twenty-first resistor R21, the twenty-third resistor R23 is in parallel with the twenty-second resistor R22, and one end of the twenty-third resistor R23 is connected to the first primary winding e of the second transformer T2; the other end of the twenty-first resistor R21 is connected to one end of the twenty-fourth resistor R24, and the other end of the twenty-fourth resistor R24 is connected to the third pin of the output voltage control chip IC3; the twenty-fifth resistor R25 is connected to one end of the tenth capacitor C10, and the twenty-fifth resistor R25, the twenty-sixth resistor R26, and the twenty-seventh resistor R27 are connected in series in sequence and then connected to the first pin of the output voltage control chip IC3; one end of the fourteenth capacitor C14 is connected to the first pin of the output voltage control chip IC3, and the other end of the fourteenth capacitor C14 is connected to the primary side ground; the anode of the twelfth diode D12 is connected to the second primary winding f of the second transformer T2, the cathode of the twelfth diode D12 is connected to one end of the fifteenth capacitor C15, and the other end of the fifteenth capacitor C15 is connected to the primary side ground; the anode of the thirteenth diode D13 is connected to the second primary winding f of the second transformer T2, the cathode of the thirteenth diode D13 is connected to one end of the twenty-eighth resistor R28, the other end of the twenty-eighth resistor R28 is connected to one end of the twenty-ninth resistor R29, the other end of the twenty-ninth resistor R29 is connected to the primary side ground, and the common connection end of the twenty-eighth resistor R28 and the twenty-ninth resistor R29 is connected to the first pin of the output voltage control chip IC3;One end of the thirtieth resistor R30 is connected to the output end of the half-bridge resonant conversion module 100, the other end of the thirtieth resistor R30 is connected to one end of the thirty-first resistor R31, the other end of the thirty-first resistor R31 is connected to one end of the thirty-second resistor R32, and the other end of the thirty-second resistor R32 is connected to the secondary side ground; the sixteenth capacitor C16 is connected in parallel with the thirtieth resistor R30; one end of the thirty-third resistor R33 is connected to the common connection end of the thirty-first resistor R31 and the thirty-second resistor R32, the other end of the thirty-third resistor R33 is connected to one end of the seventeenth capacitor C17, and the other end of the seventeenth capacitor C17 is respectively connected to one end of the thirty-fourth resistor R34, one end of the thirty-fifth resistor R35, and the cathode of the voltage regulator S1; the anode of the voltage regulator S1 is connected to the secondary side ground, and the control end of the voltage regulator S1 is connected to the common connection end of the thirty-first resistor R31 and the thirty-second resistor R32; the other end of the thirty-fourth resistor R34 is connected to the anode of the optocoupler OC, and the cathode of the fourteenth diode D14 is connected to one end of the sixteenth capacitor C16; the other end of the thirty-fifth resistor R35 is connected to the cathode of the optocoupler OC, and the anode of the fourteenth diode D14 is connected to the anode of the optocoupler OC; the thirty-sixth resistor R36 is connected in parallel with the collector and emitter of the optocoupler OC; one end of the thirty-seventh resistor R37 is connected to the emitter of the optocoupler OC, and the other end of the thirty-seventh resistor R37 is connected to the fourth pin of the output voltage control chip IC3; the output voltage control chip IC3 is configured to adjust the primary side current according to the voltage signals of the twenty-first resistor R21, the twenty-second resistor R22, and the twenty-third resistor R23, and is configured to compare the voltage signal collected from the secondary side of the optocoupler OC with the internal reference voltage to adjust and control the output voltage.

[0101] Specifically, the first pin of the output voltage control chip IC3 is the power supply pin, and the tenth capacitor C10, through the twenty-fifth resistor R25, the twenty-sixth resistor R26, and the twenty-seventh resistor R27, provides startup current for the output voltage control chip IC3. The second pin of the output voltage control chip IC3 is the ground terminal, and the third pin is the primary side detection terminal of the second transformer T2. By detecting the voltage signals of the twenty-first resistor R21, the twenty-second resistor R22, and the twenty-third resistor R23, the primary current of the second transformer T2 is regulated and overcurrent protection is provided. The fourth pin of the output voltage control chip IC3 is the output voltage control pin. The secondary voltage signal (i.e., the output voltage), through the thirtieth resistor R30, the thirty-first resistor R31, the thirty-second resistor R32, the voltage regulator S1, and the optocoupler OC, is compared with the reference voltage signal inside the fourth pin of the output voltage control chip IC3 to adjust and control the magnitude of the output voltage, that is, to control the voltage across the thirteenth capacitor C13.

[0102] The first transformer T1 has a first winding a, a second winding b, a third winding c, and a fourth winding d. The second transformer T2 has a first primary winding e, a second primary winding f, a first secondary winding g, and a second secondary winding h. The common connection end of the eighth diode D8 and the ninth diode D9 is connected to one end of the third winding c of the first transformer T1. The other end of the third winding c of the first transformer T1 is connected to the first primary winding e of the second transformer T2 through the fourth inductor L4. The fifth and sixth pins of the output voltage control chip IC3 are startup pulse output pins. In the first two cycles, the output voltage control chip IC3 sends startup pulse signals through the fifth and sixth pins, causing the first transformer T1 to oscillate to drive the first triode Q1 and the second triode Q2 to work. After that, the first transformer T1 can self-excite and no longer requires the output voltage control chip IC3 to provide pulse signals.

[0103] In some embodiments, the present invention also provides a lighting device, which includes the microwave induction-based LED drive power supply as described above. Specifically, as described in the embodiment of a microwave induction-based LED drive power supply, it will not be elaborated here.

[0104] In summary, the microwave induction-based LED drive power supply and lighting device provided by the present invention have the following beneficial effects:

[0105] By adjusting the constant working current of the LED light source through a step-down constant current module, multi-gear current regulation can be achieved, so as to obtain appropriate lighting brightness. And a microwave control module is used to detect lighting requirements, and a control signal can be output to control the on or off of the LED light source, so that it can be realized that the lighting device does not work in the case where lighting is not required, achieving the purpose of saving energy.

[0106] It should be understood that the application of the present utility model is not limited to the above examples. For those of ordinary skill in the art, improvements or transformations can be made according to the above description, and all such improvements and transformations should fall within the protection scope of the appended claims of the present utility model.

Claims

1. An LED driving power supply based on microwave induction, characterized in that, Comprising: A half-bridge resonant conversion module, a step-down constant current module, an auxiliary power supply and a microwave control module; wherein, The half-bridge resonant conversion module is respectively connected to the step-down constant current module and the auxiliary power supply, and the half-bridge resonant conversion module is used to convert the mains power into a DC voltage to supply power to the step-down constant current module and the auxiliary power supply respectively; The step-down constant current module is connected to the half-bridge resonant conversion module, and the step-down constant current module is used to provide a constant working current for the LED light source and adjust the constant working current; The microwave control module is connected to the step-down constant current module, and the microwave control module is used to detect the lighting environment state and output a control signal according to the detection signal to control the working state of the step-down constant current module; The auxiliary power supply is respectively connected to the half-bridge resonant conversion module and the microwave control module, and the auxiliary power supply is used to supply power to the microwave control module.

2. The LED driving power supply based on microwave induction according to claim 1, characterized in that, The step-down constant current module includes: a step-down constant current driving chip, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a first switch, a second switch, a third switch, a first diode, a first inductor, a first capacitor and a second capacitor; wherein, One end of the first resistor is connected to the seventh pin of the step-down constant current driving chip, the other end of the first resistor is connected to one end of the second resistor, and the other end of the second resistor is connected to the secondary side ground; One end of the third resistor is connected to one end of the fourth resistor, the other end of the third resistor is connected to the secondary side ground, one end of the fourth resistor is also connected to the sixth pin of the step-down constant current driving chip, and the other end of the fourth resistor is connected to the output end of the microwave control module; One end of the fifth resistor is connected to one end of the first switch, the other end of the fifth resistor is connected to the secondary side ground, the other end of the first switch is connected to the eighth pin of the step-down constant current driving chip, and the sixth resistor is connected in parallel with the fifth resistor; One end of the seventh resistor is connected to one end of the second switch, the other end of the seventh resistor is connected to the secondary side ground, the other end of the second switch is connected to the eighth pin of the step-down constant current driving chip, and the eighth resistor is connected in parallel with the seventh resistor; One end of the ninth resistor is connected to one end of the third switch, the other end of the ninth resistor is connected to the secondary side ground, the other end of the third switch is connected to the eighth pin of the step-down constant current driving chip, and the tenth resistor is connected in parallel with the ninth resistor; One end of the eleventh resistor is connected to one end of the twelfth resistor, and the other end of the eleventh resistor and the other end of the twelfth resistor are connected to the third pin of the step-down constant current driving chip; the third pin of the step-down constant current driving chip is also connected to the LED light source; The anode of the first diode is connected to the first pin of the step-down constant current driving chip and one end of the first inductor, the cathode of the first diode is connected to the output end of the half-bridge resonant conversion module, and the other end of the first inductor is connected to the LED light source; One end of the first capacitor is connected to the fifth pin of the buck constant-current driving chip, and the other end of the first capacitor is connected to the secondary side ground; One end of the second capacitor is connected to the LED light source, and the other end of the second capacitor is connected to the output end of the half-bridge resonant conversion module.

3. The LED driving power supply based on microwave induction according to claim 1, characterized in that The auxiliary power supply includes: a buck constant-voltage driving chip, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a second diode, a second inductor, a third capacitor, and a fourth capacitor; wherein, One end of the thirteenth resistor is connected to the fourth pin of the buck constant-voltage driving chip, and the other end of the thirteenth resistor is connected to the output end of the half-bridge resonant conversion module; One end of the fourteenth resistor is connected to the sixth pin of the buck constant-voltage driving chip, and the other end of the fourteenth resistor is connected to one end of the fourth capacitor; One end of the third capacitor is connected to the first pin of the buck constant-voltage driving chip, and the other end of the third capacitor is connected to one end of the second inductor and the cathode of the second diode. The other end of the second inductor is connected to one end of the fourth capacitor. The other end of the fourth capacitor is connected to the secondary side ground, and one end of the fourth capacitor is also connected to the power supply end of the microwave control module; The fifteenth resistor is connected in parallel with the fourth capacitor; The anode of the second diode is connected to the secondary side ground.

4. The LED driving power supply based on microwave induction according to claim 1, wherein The half-bridge resonant conversion module includes: an EMI filtering unit, a power factor correction unit, a first transformer unit, a second transformer unit, a half-bridge conversion unit, and an output voltage control unit; wherein, The EMI filtering unit is connected to the power factor correction unit, and the EMI filtering unit is used for filtering the mains power; The power factor correction unit is respectively connected to the half-bridge conversion unit and the output voltage control unit, and the power factor correction unit is used for adjusting the magnitude of the power factor; The half-bridge conversion unit is connected to the first transformer unit, and the half-bridge conversion unit is used for converting the DC voltage output by the power factor correction unit into an AC voltage; The first transformer unit is connected to the second transformer unit, and the second transformer unit is used for stepping down and rectifying the AC voltage output by the half-bridge conversion unit and then outputting a DC voltage; The output voltage control unit is respectively connected to the first transformer unit, the second transformer unit, and the output end of the half-bridge resonant conversion module. The output voltage control unit is used for exciting the first transformer unit to work in the first two cycles, and for controlling the output voltage and realizing overcurrent protection.

5. The LED driving power supply based on microwave induction according to claim 4, characterized in that, The EMI filtering unit includes: a fuse, a varistor, a common-mode inductor, a third inductor, a fifth capacitor, and a sixth capacitor; wherein, One end of the varistor is connected to the fuse, and the other end of the varistor is used for connecting to the neutral line; The fifth capacitor is connected in parallel with the varistor; The first input terminal and the second input terminal of the common-mode inductor are respectively connected to both ends of the fifth capacitor. The first output terminal of the common-mode inductor is connected to one end of the third inductor, and the second output terminal of the common-mode inductor is connected to one end of the sixth capacitor. The other end of the sixth capacitor is connected to the other end of the third inductor.

6. The LED driving power supply based on microwave induction according to claim 5, wherein, The power factor correction unit includes: a third diode, a fourth diode, a fifth diode, a sixth diode, a seventh diode, a seventh capacitor, an eighth capacitor, a ninth capacitor and a tenth capacitor; wherein, The common connection end of the anode of the third diode and the cathode of the fourth diode is connected to the other end of the sixth capacitor. The cathode of the third diode is connected to the cathode of the fourth diode and one end of the tenth capacitor. The anode of the fourth diode is connected to one end of the eighth capacitor and the common connection end of the anode of the sixth diode and the cathode of the seventh diode. The common connection end of the anode of the fifth diode and the cathode of the sixth diode is connected to one end of the sixth capacitor. The anode of the seventh diode is connected to the other end of the tenth capacitor. One end of the seventh capacitor is connected to the other end of the sixth capacitor, and the other end of the seventh capacitor is connected to the primary side ground. One end of the eighth capacitor is connected to the anode of the fourth diode, and the other end of the eighth capacitor is connected to the primary side ground. The ninth capacitor is connected in parallel with the seventh diode.

7. The LED driving power supply based on microwave induction according to claim 6, wherein, The first transformer unit includes a first transformer. The half-bridge conversion unit includes: a sixteenth resistor, a seventeenth resistor, a first triode, a second triode, an eighth diode, a ninth diode and an eleventh capacitor; wherein, One end of the sixteenth resistor is connected to one end of the first winding of the first transformer, and the other end of the sixteenth resistor is connected to the base of the first triode. One end of the seventeenth resistor is connected to one end of the second winding of the first transformer, and the other end of the seventeenth resistor is connected to the base of the second triode. The collector of the first triode is connected to one end of the tenth capacitor, and the emitter of the first triode is connected to the other end of the first winding of the first transformer and the common connection end of the eighth diode and the ninth diode. The emitter of the second triode is connected to the other end of the tenth capacitor. The eleventh capacitor is connected in parallel with the ninth diode. The cathode of the eighth diode is connected to one end of the tenth capacitor, the anode of the eighth diode is connected to the cathode of the ninth diode, the anode of the ninth diode is connected to the other end of the tenth capacitor, and the common connection end of the eighth diode and the ninth diode is connected to one end of the third winding of the first transformer.

8. The LED driving power supply based on microwave induction according to claim 7, characterized in that, The second transformer unit includes: a second transformer, a fourth inductor, a twelfth diode, an eleventh diode, a twelfth capacitor and a thirteenth capacitor; wherein, One end of the fourth inductor is connected to the other end of the third winding of the first transformer, and the other end of the fourth inductor is connected to one end of the first primary winding of the second transformer. The anode of the twelfth diode is connected to the first secondary winding of the second transformer, and the cathode of the twelfth diode is connected to one end of the thirteenth capacitor; The anode of the eleventh diode is connected to the second secondary winding of the second transformer, the cathode of the eleventh diode is connected to one end of the thirteenth capacitor, and the other end of the thirteenth capacitor is connected to the secondary side ground; One end of the twelfth capacitor is connected to the first primary winding of the second transformer, and the other end of the twelfth capacitor is connected to the primary side ground.

9. The LED driving power supply based on microwave induction according to claim 8, characterized in that, The output voltage control unit includes: an output voltage control chip, an eighteenth resistor, a nineteenth resistor, a twentieth resistor, a twenty-first resistor, a twenty-second resistor, a twenty-third resistor, a twenty-fourth resistor, a twenty-fifth resistor, a twenty-sixth resistor, a twenty-seventh resistor, a twenty-eighth resistor, a twenty-ninth resistor, a thirtieth resistor, a thirty-first resistor, a thirty-second resistor, a thirty-third resistor, a thirty-fourth resistor, a thirty-fifth resistor, a thirty-sixth resistor, a thirty-seventh resistor, a twelfth diode, a thirteenth diode, a fourteenth diode, a fourteenth capacitor, a fifteenth capacitor, a sixteenth capacitor, a seventeenth capacitor, an optocoupler, and a voltage regulator; wherein, One end of the eighteenth resistor is connected to the other end of the tenth capacitor, the other end of the eighteenth resistor is connected to one end of the nineteenth resistor, the other end of the nineteenth resistor is connected to one end of the twentieth resistor, and the other end of the twentieth resistor is connected to one end of the twenty-first resistor; The twenty-second resistor is in parallel with the twenty-first resistor, the twenty-third resistor is in parallel with the twenty-second resistor, and one end of the twenty-third resistor is connected to the first primary winding of the second transformer; The other end of the twenty-first resistor is connected to one end of the twenty-fourth resistor, and the other end of the twenty-fourth resistor is connected to the third pin of the output voltage control chip; The twenty-fifth resistor is connected to one end of the tenth capacitor, and the twenty-fifth resistor, the twenty-sixth resistor, and the twenty-seventh resistor are connected in series in sequence and then connected to the first pin of the output voltage control chip; One end of the fourteenth capacitor is connected to the first pin of the output voltage control chip, and the other end of the fourteenth capacitor is connected to the primary side ground; The anode of the twelfth diode is connected to the second primary winding of the second transformer, the cathode of the twelfth diode is connected to one end of the fifteenth capacitor, and the other end of the fifteenth capacitor is connected to the primary side ground; The anode of the thirteenth diode is connected to the second primary winding of the second transformer, the cathode of the thirteenth diode is connected to one end of the twenty-eighth resistor, the other end of the twenty-eighth resistor is connected to one end of the twenty-ninth resistor, the other end of the twenty-ninth resistor is connected to the primary side ground, and the common connection end of the twenty-eighth resistor and the twenty-ninth resistor is connected to the first pin of the output voltage control chip; One end of the thirtieth resistor is connected to the output end of the half-bridge resonant conversion module, the other end of the thirtieth resistor is connected to one end of the thirty-first resistor, the other end of the thirty-first resistor is connected to one end of the thirty-second resistor, and the other end of the thirty-second resistor is connected to the secondary side ground; The sixteenth capacitor is connected in parallel with the thirtieth resistor; One end of the thirty-third resistor is connected to the common connection end of the thirty-first resistor and the thirty-second resistor, the other end of the thirty-third resistor is connected to one end of the seventeenth capacitor, and the other end of the seventeenth capacitor is respectively connected to one end of the thirty-fourth resistor, one end of the thirty-fifth resistor, and the cathode of the voltage regulator; The anode of the voltage regulator is connected to the secondary side ground, and the control end of the voltage regulator is connected to the common connection end of the thirty-first resistor and the thirty-second resistor; The other end of the thirty-fourth resistor is connected to the anode of the optocoupler, and the cathode of the fourteenth diode is connected to one end of the sixteenth capacitor; The other end of the thirty-fifth resistor is connected to the cathode of the optocoupler, and the anode of the fourteenth diode is connected to the anode of the optocoupler; The thirty-sixth resistor is connected in parallel with the collector and emitter of the optocoupler; One end of the thirty-seventh resistor is connected to the emitter of the optocoupler, and the other end of the thirty-seventh resistor is connected to the fourth pin of the output voltage control chip; The output voltage control chip is used to adjust the primary side current according to the voltage signals of the twenty-first resistor, the twenty-second resistor, and the twenty-third resistor, and is used to compare the voltage signal collected from the secondary side of the optocoupler with the internal reference voltage to adjust and control the output voltage.

10. A lighting device, characterized in that, It includes the LED driving power supply based on microwave induction according to any one of claims 1-9.

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