A wireless driving circuit for a lighting fixture, a PCB board and its driving power supply

Abstract

The invention discloses a wireless driving circuit for a lamp, a PCB board and a driving power supply thereof, comprising a front-stage input unit, a constant voltage conversion unit, a wireless power supply unit, a wireless radio frequency unit and a light source output unit group; the output end of the front-stage input unit is connected with a surge absorption unit and a quick start unit in sequence, the quick start unit is connected with the input end of the constant voltage conversion unit, the output end of the constant voltage conversion unit is respectively connected with the wireless power supply unit and the light source output unit group, and the wireless radio frequency unit is respectively connected with the wireless power supply unit and the light source output unit group; when working, the surge absorption unit absorbs the lightning surge voltage to prevent the lightning surge voltage from damaging the circuit, so that the circuit can be connected to a mains with a higher voltage, and when the input voltage enters the quick start unit, the constant voltage conversion unit is quickly started by quick feedback control, so as to shorten the start time of the constant voltage conversion unit, and avoid the situation that the mains with a lower voltage cannot directly drive the constant voltage conversion unit when input.

Description

Technical Field

[0001] The present invention relates to the technical field of driving power supplies, and particularly relates to a wireless driving circuit for a lamp, a PCB board and a driving power supply thereof. Background Art

[0002] The input voltage range of existing wireless driving power supplies is generally 100V - 240V or 120V or 220V - 240V, etc. It can be seen that the acceptable input voltage range of existing wireless driving power supplies is relatively narrow, and it is difficult to meet the requirements of mains input in different countries. In addition, the communication method of existing wireless driving power supplies is mainly through WiFi communication connection. However, if the WiFi signal coverage is not available, it is difficult to achieve remote communication control.

[0003] It can be seen that the existing technology still needs to be improved. Summary of the Invention

[0004] In view of the above deficiencies of the existing technology, the purpose of the present invention is to provide a wireless driving circuit for a lamp, which builds a fast start unit and a surge absorption unit at the input end of the circuit to meet the requirements of start-up time during low-voltage input, reduce the loss during high-voltage input, and protect the circuit from being damaged by lightning surge impact during high-voltage input.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A wireless driving circuit for a lamp includes a front-stage input unit, a constant-voltage conversion unit, a wireless power supply unit, a wireless radio frequency unit and a light source output unit group; the output end of the front-stage input unit is sequentially connected with a surge absorption unit and a fast start unit, the fast start unit is connected to the input end of the constant-voltage conversion unit, the output end of the constant-voltage conversion unit is respectively connected to the wireless power supply unit and the light source output unit group, and the wireless radio frequency unit is respectively connected to the wireless power supply unit and the light source output unit group; the front-stage input unit is used to connect with an external mains supply; the surge absorption unit is used to absorb the surge signal generated by the external mains supply; the fast start unit is used to feedback control the constant-voltage conversion unit according to the input signal of the external mains supply; the constant-voltage conversion unit is used to convert the external mains supply into a DC voltage; the wireless power supply unit is used to supply power to the wireless radio frequency unit; the wireless radio frequency unit is used to perform self-networking on the light source output unit group and control the operation of the light source output unit group according to an external control signal; the light source output unit group is used to supply power to an external lamp.

[0007] In the described wireless driving circuit of the lamp, the front-stage input unit includes a filtering part and a rectifying part connected in sequence; the surge absorption unit includes a first absorption part and a second absorption part. The positive terminal of the first absorption part is connected to the positive output terminal of the rectifying part, the negative terminal of the first absorption part is connected to the positive terminal of the second absorption part, and the negative terminal of the second absorption part is connected to the negative output terminal of the rectifying part; the fast startup unit includes a first field-effect transistor Q1, a startup part, and a current-limiting part. The gate of the first field-effect transistor Q1 is connected to one end of the startup part, the other end of the startup part is connected to the positive terminal of the first absorption part, the source of the first field-effect transistor Q1 is connected to the input terminal of the constant-voltage conversion unit, the drain of the first field-effect transistor Q1 is connected to one end of the current-limiting part, and the other end of the current-limiting part is connected to the positive terminal of the first absorption part.

[0008] In the described wireless driving circuit of the lamp, the first absorption part includes a first electrolytic capacitor EC1, a ninth resistor R9, and a fifteenth resistor R15; the second absorption part includes a second electrolytic capacitor EC2, a twelfth resistor R12, and a nineteenth resistor R19; the positive electrode of the first electrolytic capacitor EC1 is respectively connected to one end of the ninth resistor R9 and the positive output terminal of the rectifying part, the other end of the ninth resistor R9 is connected to one end of the fifteenth resistor R15, the negative electrode of the first electrolytic capacitor EC1 is respectively connected to the other end of the fifteenth resistor R15 and the positive electrode of the second electrolytic capacitor EC2, one end of the twelfth resistor R12 is connected to the positive electrode of the second electrolytic capacitor EC2, the other end of the twelfth resistor R12 is connected to one end of the nineteenth resistor R19, and the negative electrode of the second electrolytic capacitor EC2 is respectively connected to the other end of the nineteenth resistor R19 and the negative output terminal of the rectifying part.

[0009] In the described wireless driving circuit of the lamp, the constant-voltage conversion unit includes a first control chip U1, a transformer TR1, a second field-effect transistor Q2, and a post-stage output part. Pin 1 of the first control chip U1 is connected to the fast startup unit, pin 6 of the first control chip U1 is connected to the gate of the second field-effect transistor Q2, pin 4 of the first control chip U1 is connected to the source of the second field-effect transistor Q2, the primary winding of the transformer TR1 is respectively connected to the drain of the second field-effect transistor Q2, the secondary winding of the transformer TR1 is connected to the post-stage output part, and the auxiliary winding of the transformer TR1 is respectively connected to pin 2 of the first control chip U1 and the wireless power supply unit.

[0010] In the described wireless driving circuit of the lamp, the wireless power supply unit includes a second control chip U2. The pin 2 of the second control chip U2 is connected to the auxiliary winding of the transformer TR1, and the pin 6 of the second control chip U2 is connected to the wireless radio frequency unit.

[0011] In the described wireless driving circuit of the lamp, the wireless radio frequency unit includes a third control chip U3. The pin 8 of the third control chip U3 is connected to the pin 6 of the second control chip U2, and the pins 5, 6, 7, 13 and 14 of the third control chip U3 are respectively connected to the light source output unit group.

[0012] In the described wireless driving circuit of the lamp, the light source output unit group includes a warm light output circuit, a cold light output circuit, a red light output circuit, a green light output circuit and a blue light output circuit. The warm light output circuit, the cold light output circuit, the red light output circuit, the green light output circuit and the blue light output circuit are sequentially connected to the pins 6, 5, 13, 7 and 14 of the third control chip U3.

[0013] In the described wireless driving circuit of the lamp, the warm light output circuit includes a fourth control chip U4, a fourth field effect transistor Q4, a warm light positive output terminal and a warm light negative output terminal. The pin 1 of the fourth control chip U4 is connected to the pin 6 of the third control chip U3. The pin 4 of the fourth control chip U4 is connected to the gate of the fourth field effect transistor Q4. The source of the fourth field effect transistor Q4 is grounded. The drain of the fourth field effect transistor Q4 is connected to the warm light negative output terminal. The pin 8 of the fourth control chip U4 is respectively connected to the subsequent stage output part and the warm light positive output terminal;

[0014] The cold light output circuit includes a fifth control chip U5, a fifth field effect transistor Q5, a cold light positive output terminal and a cold light negative output terminal. The pin 1 of the fifth control chip U5 is connected to the pin 5 of the third control chip U3. The pin 4 of the fifth control chip U5 is connected to the gate of the fifth field effect transistor Q5. The source of the fifth field effect transistor Q5 is grounded. The drain of the fifth field effect transistor Q5 is connected to the cold light negative output terminal. The pin 8 of the fifth control chip U5 is respectively connected to the subsequent stage output part and the cold light positive output terminal;

[0015] The red light output circuit includes a sixth control chip U6, a sixth field effect transistor Q6, a red light positive output terminal, and a red light negative output terminal. The pin 1 of the sixth control chip U6 is connected to the pin 13 of the third control chip U3. The pin 4 of the sixth control chip U6 is connected to the gate of the sixth field effect transistor Q6. The source of the sixth field effect transistor Q6 is grounded. The drain of the sixth field effect transistor Q6 is connected to the red light negative output terminal. The pin 8 of the sixth control chip U6 is respectively connected to the subsequent stage output part and the red light positive output terminal;

[0016] The green light output circuit includes a seventh control chip U7, a seventh field effect transistor Q7, a green light positive output terminal, and a green light negative output terminal. The pin 1 of the seventh control chip U7 is connected to the pin 7 of the third control chip U3. The pin 4 of the seventh control chip U7 is connected to the gate of the seventh field effect transistor Q7. The source of the seventh field effect transistor Q7 is grounded. The drain of the seventh field effect transistor Q7 is connected to the green light negative output terminal. The pin 8 of the seventh control chip U7 is respectively connected to the subsequent stage output part and the green light positive output terminal;

[0017] The blue light output circuit includes an eighth control chip U8, an eighth field effect transistor Q8, a blue light positive output terminal, and a blue light negative output terminal. The pin 1 of the eighth control chip U8 is connected to the pin 14 of the third control chip U3. The pin 4 of the eighth control chip U8 is connected to the gate of the eighth field effect transistor Q8. The source of the eighth field effect transistor Q8 is grounded. The drain of the eighth field effect transistor Q8 is connected to the blue light negative output terminal. The pin 8 of the eighth control chip U8 is respectively connected to the subsequent stage output part and the blue light positive output terminal.

[0018] This application also provides a PCB board on which the above-mentioned wireless drive circuit for lamps is printed.

[0019] This application also provides a drive power supply that uses the above-mentioned wireless drive circuit for lamps to control the operation.

[0020] Beneficial effects:

[0021] The present invention provides a wireless driving circuit for a lamp. When working, after the external mains power enters this circuit, the lightning surge voltage generated by the input voltage is absorbed by the surge absorption unit, so that the lightning surge voltage generated when the front-stage input unit accesses the high-voltage external mains power will not damage this circuit, enabling this circuit to access mains power with a higher voltage. When the input voltage enters the fast start unit, it will receive an input signal and quickly feedback to control the constant voltage conversion unit to start quickly, so as to shorten the start-up time of the constant voltage conversion unit and avoid the situation that the constant voltage conversion unit cannot be directly driven when the mains power with a lower voltage is input. And it effectively reduces the loss when the high-voltage mains power is input to the constant voltage conversion unit. When the input voltage enters the constant voltage conversion unit, the mains power will be converted into a DC voltage through the constant voltage conversion unit, and the stable DC voltage will be supplied to the wireless power supply unit and the light source output unit group. The wireless power supply unit will then convert the DC voltage into a working voltage suitable for the wireless radio frequency unit to supply power to the wireless radio frequency unit. The wireless radio frequency unit will perform self-networking on the light source output unit group. During the self-networking process, even without WiFi coverage, interconnection and interoperability can be achieved. The wireless radio frequency unit will feedback and control the output state of the light source output unit group according to the external control signal to achieve the regulation of the light. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is the circuit structure diagram of the wireless driving circuit for a lamp provided by the present invention;

[0023] Figure 2 is the circuit structure diagram of the front-stage input unit, the constant voltage conversion unit and the wireless power supply unit in the wireless driving circuit for a lamp provided by the present invention;

[0024] Figure 3 is the circuit structure diagram of the wireless radio frequency unit in the wireless driving circuit for a lamp provided by the present invention;

[0025] Figure 4 is the circuit structure diagram of the light source driving unit group in the wireless driving circuit for a lamp provided by the present invention;

[0026] Figure 5 is the circuit structure block diagram of the wireless driving circuit for a lamp provided by the present invention.

[0027] Description of the main component symbols: 1 - front-stage input unit, 2 - surge absorption unit, 3 - fast start unit, 4 - constant voltage conversion unit, 5 - wireless power supply unit, 6 - wireless radio frequency unit, 7 - light source output unit group. DETAILED DESCRIPTION OF THE INVENTION

[0028] The present invention provides a wireless driving circuit for a lamp, a printed circuit board (PCB) and a driving power supply thereof. To make the objectives, technical solutions and effects of the present invention clearer and more definite, the following further describes the present invention in detail with reference to the accompanying drawings and by way of examples. It should be understood that the specific examples described herein are only for explaining the present invention and are not used to limit the present invention.

[0029] In the description of the present invention, it should be understood that the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features.

[0030] Please refer to Figures 1 to 5 , the present invention provides a wireless driving circuit for a lamp, which includes a pre-stage input unit 1, a constant voltage conversion unit 4, a wireless power supply unit 5, a wireless radio frequency unit 6 and a light source output unit group 7; the output end of the pre-stage input unit 1 is sequentially connected with a surge absorption unit 2 and a quick start unit 3, the quick start unit 3 is connected to the input end of the constant voltage conversion unit 4, the output end of the constant voltage conversion unit 4 is respectively connected to the wireless power supply unit 5 and the light source output unit group 7, and the wireless radio frequency unit 6 is respectively connected to the wireless power supply unit 5 and the light source output unit group 7; the pre-stage input unit 1 is used to connect with an external commercial power supply; the surge absorption unit 2 is used to absorb the surge signal generated by the external commercial power supply; the quick start unit 3 is used to feedback control the constant voltage conversion unit 4 according to the input signal of the external commercial power supply; the constant voltage conversion unit 4 is used to convert the external commercial power supply into a direct current voltage; the wireless power supply unit 5 is used to supply power to the wireless radio frequency unit 6; the wireless radio frequency unit 6 is used to perform self-networking on the light source output unit group 7 and control the operation of the light source output unit group 7 according to an external control signal; the light source output unit group 7 is used to supply power to an external lamp.

[0031] The working principle of this application is as follows: The external mains power is connected to this circuit through the front-stage input unit 1. When the external mains power enters this circuit, the lightning surge voltage generated by the input voltage is absorbed by the surge absorption unit 2, so that the lightning surge voltage generated when the front-stage input unit 1 accesses the high-voltage external mains power will not damage this circuit, enabling this circuit to access mains power with a higher voltage. When the input voltage enters the fast start unit 3, it will receive the input signal and quickly feedback to control the constant voltage conversion unit 4 to start quickly, so as to shorten the start-up time of the constant voltage conversion unit 4 and avoid the situation where the low-voltage mains power cannot directly drive the constant voltage conversion unit 4 when input, and effectively reduce the loss when the high-voltage mains power enters the constant voltage conversion unit 4. When the input voltage enters the constant voltage conversion unit 4, the mains power will be converted into a DC voltage by the constant voltage conversion unit 4, and the stable DC voltage will be supplied to the wireless power supply unit 5 and the light source output unit group 7. The wireless power supply unit 5 will then convert the DC voltage into a working voltage suitable for the wireless radio frequency unit 6 to supply power to the wireless radio frequency unit 6. The wireless radio frequency unit 6 will self-organize the light source output unit group 7, and even without WiFi coverage, interconnection and interoperability can be achieved during the self-organization process. The wireless radio frequency unit 6 will feedback and control the output state of the light source output unit group 7 according to the external control signal to achieve the regulation of the lights.

[0032] It should be noted that a wider range of mains power input can be achieved through this circuit, such as being able to withstand a wider range of mains power input voltages to meet the electricity consumption needs of different countries.

[0033] Such as Figures 1 to 5As shown, further, the pre-stage input unit 1 includes a filtering part and a rectifying part connected in sequence; the surge absorption unit 2 includes a first absorption part and a second absorption part. The positive terminal of the first absorption part is connected to the positive output terminal of the rectifying part, the negative terminal of the first absorption part is connected to the positive terminal of the second absorption part, and the negative terminal of the second absorption part is connected to the negative output terminal of the rectifying part; the fast start unit 3 includes a first field effect transistor Q1, a starting part, and a current limiting part. The gate of the first field effect transistor Q1 is connected to one end of the starting part, the other end of the starting part is connected to the positive terminal of the first absorption part, the source of the first field effect transistor Q1 is connected to the input terminal of the constant voltage conversion unit 4, the drain of the first field effect transistor Q1 is connected to one end of the current limiting part, and the other end of the current limiting part is connected to the positive terminal of the first absorption part; during operation, when external mains power is input to the pre-stage input unit 1, the mains power is subjected to full-wave rectification by the filtering part and the rectifying part, and the rectified and filtered voltage is secondarily filtered by the first absorption part and the second absorption part respectively to absorb the lightning surge voltage. When the gate of the first field effect transistor Q1 receives the input signal at the positive terminal of the first absorption part through the current limiting part, the first field effect transistor Q1 is turned on, obtains the input signal through the starting part, and quickly transmits the input signal to the input terminal of the constant voltage conversion unit 4, so that the constant voltage conversion unit 4 is quickly started and performs step-down conversion processing on the input voltage to quickly obtain a stable DC voltage.

[0034] In this embodiment, the current limiting part includes a second resistor R2, a tenth resistor R10, and a thirteenth resistor R13 connected in sequence; the starting part includes a fourth resistor R4, an eleventh resistor R11, and a fourteenth resistor R14 connected in sequence.

[0035] In one embodiment, the filtering part is an RCL filtering circuit composed of a first capacitor CX1, a second common mode inductor L2, a third common mode inductor L3, and a varistor VR1; the rectifying part is a rectifying circuit composed of a rectifier bridge BD1.

[0036] As Figures 1 to 5As shown, further, the first absorption part includes a first electrolytic capacitor EC1, a ninth resistor R9, and a fifteenth resistor R15; the second absorption part includes a second electrolytic capacitor EC2, a twelfth resistor R12, and a nineteenth resistor R19; the positive electrode of the first electrolytic capacitor EC1 is respectively connected to one end of the ninth resistor R9 and the positive output terminal of the rectifying part, the other end of the ninth resistor R9 is connected to one end of the fifteenth resistor R15, the negative electrode of the first electrolytic capacitor EC1 is respectively connected to the other end of the fifteenth resistor R15 and the positive electrode of the second electrolytic capacitor EC2, one end of the twelfth resistor R12 is connected to the positive electrode of the second electrolytic capacitor EC2, the other end of the twelfth resistor R12 is connected to one end of the nineteenth resistor R19, and the negative electrode of the second electrolytic capacitor EC2 is respectively connected to the other end of the nineteenth resistor R19 and the negative output terminal of the rectifying part; a series-parallel RC filtering circuit is formed by the first electrolytic capacitor EC1, the ninth resistor R9, and the fifteenth resistor R15 and the second electrolytic capacitor EC2, the twelfth resistor R12, and the nineteenth resistor R19. By setting the electrolytic capacitor, the resistance of this circuit to lightning surge impact can be improved, making this circuit not easily broken down by lightning surges.

[0037] As Figures 1 to 5 shown, further, the constant voltage conversion unit 4 includes a first control chip U1, a transformer TR1, a second field effect transistor Q2, and a post-stage output part. The pin 1 of the first control chip U1 is connected to the fast start unit 3, the pin 6 of the first control chip U1 is connected to the gate of the second field effect transistor Q2, the pin 4 of the first control chip U1 is connected to the source of the second field effect transistor Q2, the primary winding of the transformer TR1 is respectively connected to the drain of the second field effect transistor Q2, the secondary winding of the transformer TR1 is connected to the post-stage output part, and the auxiliary winding of the transformer TR1 is respectively connected to the pin 2 of the first control chip U1 and the wireless power supply unit 5; during operation, when the pin 1 of the first control chip U1 receives the start signal from the fast start unit 3, a start signal is sent to the gate of the second field effect transistor Q2 to turn on the second field effect transistor Q2, so as to control the transformer TR1 to perform conversion processing on the input voltage to obtain a stable DC voltage. When the DC voltage is input to the post-stage output part, the DC voltage is further rectified and filtered by the post-stage output part to make the DC voltage smoother and improve the stability during power supply. When the DC voltage is input to the wireless power supply unit 5, the wireless power supply unit 5 reduces the DC voltage to obtain the operating voltage suitable for the wireless radio frequency unit 6.

[0038] In this embodiment, the first control chip U1 is a power management chip with the model IW3627-00.

[0039] As shown Figures 1 to 5 As shown, further, the wireless power supply unit 5 includes a second control chip U2. The pin 2 of the second control chip U2 is connected to the auxiliary winding of the transformer TR1, and the pin 6 of the second control chip U2 is connected to the wireless radio frequency unit 6. During operation, when the auxiliary winding inputs a voltage signal to the pin 2 of the second control chip U2, the second control chip U2 steps down the voltage signal to obtain a stable supply voltage, and inputs the supply voltage to the wireless radio frequency unit 6 through the pin 6 for power supply.

[0040] In this embodiment, the second control chip U2 is a voltage regulator chip with the model number OC5864.

[0041] As shown Figures 1 to 5 As shown, further, the wireless radio frequency unit 6 includes a third control chip U3. The pin 8 of the third control chip U3 is connected to the pin 6 of the second control chip U2, and the pins 5, 6, 7, 13, and 14 of the third control chip U3 are respectively connected to the light source output unit group 7. During operation, the third control chip U3 receives the supply voltage from the second control chip U2 through the pin 8. When the third control chip U3 receives an external control signal, it feeds back and controls the working state of the light source output unit group 7 through the pins 5, 6, 7, 13, and 14 according to the control signal to realize the regulation of the lamp light. In addition, the third control chip U3 performs self-networking processing on the light source output unit group 7 based on the WiFi-mesh protocol, so that this circuit can also control the lamp in a scenario without WiFi coverage.

[0042] In this embodiment, the third control chip U3 is a communication chip with the model number.

[0043] As shown Figures 1 to 5 As shown, further, the light source output unit group 7 includes a warm light output circuit, a cold light output circuit, a red light output circuit, a green light output circuit, and a blue light output circuit. The warm light output circuit, the cold light output circuit, the red light output circuit, the green light output circuit, and the blue light output circuit are sequentially connected to the pins 6, 5, 13, 7, and 14 of the third control chip U3. By setting the warm light output circuit, the cold light output circuit, the red light output circuit, the green light output circuit, and the blue light output circuit, this circuit forms five-way output. By separately setting five-way light source output, a larger output power can be satisfied, so that this circuit can simultaneously control the operation of multiple high-power lamps.

[0044] As shown Figures 1 to 5As shown, further, the warm light output circuit includes a fourth control chip U4, a fourth field effect transistor Q4, a warm light positive output terminal, and a warm light negative output terminal. The pin 1 of the fourth control chip U4 is connected to the pin 6 of the third control chip U3. The pin 4 of the fourth control chip U4 is connected to the gate of the fourth field effect transistor Q4. The source of the fourth field effect transistor Q4 is grounded. The drain of the fourth field effect transistor Q4 is connected to the warm light negative output terminal. The pin 8 of the fourth control chip U4 is respectively connected to the post-stage output section and the warm light positive output terminal. During operation, the fourth control chip U4 adjusts the duty cycle of the output power according to the PWM dimming signal sent from the pin 6 of the third control chip U3, that is, adjusts the switching state of the fourth field effect transistor Q4, thereby realizing the control of external warm light lamps.

[0045] The cold light output circuit includes a fifth control chip U5, a fifth field effect transistor Q5, a cold light positive output terminal, and a cold light negative output terminal. The pin 1 of the fifth control chip U5 is connected to the pin 5 of the third control chip U3. The pin 4 of the fifth control chip U5 is connected to the gate of the fifth field effect transistor Q5. The source of the fifth field effect transistor Q5 is grounded. The drain of the fifth field effect transistor Q5 is connected to the cold light negative output terminal. The pin 8 of the fifth control chip U5 is respectively connected to the post-stage output section and the cold light positive output terminal. During operation, the fifth control chip U5 adjusts the duty cycle of the output power according to the PWM dimming signal sent from the pin 5 of the third control chip U3, that is, adjusts the switching state of the fifth field effect transistor Q5, thereby realizing the control of external cold light lamps.

[0046] The red light output circuit includes a sixth control chip U6, a sixth field effect transistor Q6, a red light positive output terminal, and a red light negative output terminal. The pin 1 of the sixth control chip U6 is connected to the pin 13 of the third control chip U3. The pin 4 of the sixth control chip U6 is connected to the gate of the sixth field effect transistor Q6. The source of the sixth field effect transistor Q6 is grounded. The drain of the sixth field effect transistor Q6 is connected to the red light negative output terminal. The pin 8 of the sixth control chip U6 is respectively connected to the post-stage output section and the red light positive output terminal. During operation, the sixth control chip U6 adjusts the duty cycle of the output power according to the PWM dimming signal sent from the pin 13 of the third control chip U3, that is, adjusts the switching state of the sixth field effect transistor Q6, thereby realizing the control of external red light lamps.

[0047] The green light output circuit includes a seventh control chip U7, a seventh field effect transistor Q7, a green positive output terminal, and a green negative output terminal. Pin 1 of the seventh control chip U7 is connected to pin 7 of the third control chip U3. Pin 4 of the seventh control chip U7 is connected to the gate of the seventh field effect transistor Q7. The source of the seventh field effect transistor Q7 is grounded. The drain of the seventh field effect transistor Q7 is connected to the green negative output terminal. Pin 8 of the seventh control chip U7 is respectively connected to the post-stage output section and the green positive output terminal. During operation, the seventh control chip U7 adjusts the duty cycle of the output power according to the PWM dimming signal sent from pin 7 of the third control chip U3, that is, adjusts the switching state of the seventh field effect transistor Q7, thereby realizing the control of external green light fixtures.

[0048] The blue light output circuit includes an eighth control chip U8, an eighth field effect transistor Q8, a blue positive output terminal, and a blue negative output terminal. Pin 1 of the eighth control chip U8 is connected to pin 14 of the third control chip U3. Pin 4 of the eighth control chip U8 is connected to the gate of the eighth field effect transistor Q8. The source of the eighth field effect transistor Q8 is grounded. The drain of the eighth field effect transistor Q8 is connected to the blue negative output terminal. Pin 8 of the eighth control chip U8 is respectively connected to the post-stage output section and the blue positive output terminal. During operation, the eighth control chip U8 adjusts the duty cycle of the output power according to the PWM dimming signal sent from pin 14 of the third control chip U3, that is, adjusts the switching state of the eighth field effect transistor Q8, thereby realizing the control of external red light fixtures.

[0049] In this embodiment, the fourth control chip U4, the fifth control chip U5, the sixth control chip U6, the seventh control chip U7, and the eighth control chip U8 are all lighting drive chips of model RT8406.

[0050] This application also provides a switch power supply PCB board printed with the above-mentioned wireless drive circuit for lamps.

[0051] This application also provides a drive power supply that uses the above-mentioned wireless drive circuit for lamps to control its operation.

[0052] In summary, during operation, when external mains power enters this circuit, the lightning surge voltage generated by the input voltage is absorbed by the surge absorption unit 2, so that the lightning surge voltage generated when the front-stage input unit 1 accesses high-voltage external mains power will not damage this circuit, enabling this circuit to access mains power with a higher voltage. When the input voltage enters the fast start unit 3, an input signal will be received, and the fast feedback control will start the constant voltage conversion unit 4 quickly to shorten the start-up time of the constant voltage conversion unit 4, avoiding the situation where low-voltage mains power cannot directly drive the constant voltage conversion unit 4 during input, and effectively reducing the loss when high-voltage mains power enters the constant voltage conversion unit 4. When the input voltage enters the constant voltage conversion unit 4, the mains power will be converted into a DC voltage by the constant voltage conversion unit 4, and the stable DC voltage will be supplied to the wireless power supply unit 5 and the light source output unit group 7. The wireless power supply unit 5 will then convert the DC voltage into a working voltage suitable for the wireless radio frequency unit 6 to supply power to the wireless radio frequency unit 6. The wireless radio frequency unit 6 will self-organize the light source output unit group 7, and even without WiFi coverage, interconnection and interoperability can be achieved during the self-organization process. The wireless radio frequency unit 6 will feedback control the output state of the light source output unit group 7 according to an external control signal to achieve the regulation of the lights.

[0053] It can be understood that for those of ordinary skill in the art, equivalent substitutions or changes can be made according to the technical solutions and inventive concepts of the present invention, and all such changes or substitutions should fall within the protection scope of the appended claims of the present invention.

Claims

1. A wireless driving circuit for a lighting fixture, characterized in that, it comprises a pre-stage input unit, a constant-voltage conversion unit, a wireless power supply unit, a wireless radio frequency unit and a light source output unit group; the output end of the pre-stage input unit is sequentially connected with a surge absorption unit and a quick start unit, the quick start unit is connected with the input end of the constant-voltage conversion unit, the output end of the constant-voltage conversion unit is respectively connected with the wireless power supply unit and the light source output unit group, and the wireless radio frequency unit is respectively connected with the wireless power supply unit and the light source output unit group; the pre-stage input unit is used for connecting with an external commercial power supply; the surge absorption unit is used for absorbing the surge signal generated by the external commercial power supply; the quick start unit is used for feedback controlling the constant-voltage conversion unit according to the input signal of the external commercial power supply; the constant-voltage conversion unit is used for converting the external commercial power supply into a direct current voltage; the wireless power supply unit is used for supplying power to the wireless radio frequency unit; the wireless radio frequency unit is used for self-organizing a network for the light source output unit group and controlling the operation of the light source output unit group according to an external control signal; the light source output unit group is used for supplying power to an external lighting fixture; the pre-stage input unit comprises a filtering part and a rectifying part which are sequentially connected; the surge absorption unit comprises a first absorption part and a second absorption part, the positive end of the first absorption part is connected with the positive output end of the rectifying part, the negative end of the first absorption part is connected with the positive end of the second absorption part, and the negative end of the second absorption part is connected with the negative output end of the rectifying part; the quick start unit comprises a first field-effect transistor Q1, a starting part and a current-limiting part, the gate of the first field-effect transistor Q1 is connected with one end of the starting part, the other end of the starting part is connected with the positive end of the first absorption part, the source of the first field-effect transistor Q1 is connected with the input end of the constant-voltage conversion unit, the drain of the first field-effect transistor Q1 is connected with one end of the current-limiting part, and the other end of the current-limiting part is connected with the positive end of the first absorption part.

2. The wireless driving circuit for a lighting fixture according to claim 1, characterized in that, the first absorption part comprises a first electrolytic capacitor EC1, a ninth resistor R9 and a fifteenth resistor R15; the second absorption part comprises a second electrolytic capacitor EC2, a twelfth resistor R12 and a nineteenth resistor R19; the positive electrode of the first electrolytic capacitor EC1 is respectively connected with one end of the ninth resistor R9 and the positive output end of the rectifying part, the other end of the ninth resistor R9 is connected with one end of the fifteenth resistor R15, the negative electrode of the first electrolytic capacitor EC1 is respectively connected with the other end of the fifteenth resistor R15 and the positive electrode of the second electrolytic capacitor EC2, one end of the twelfth resistor R12 is connected with the positive electrode of the second electrolytic capacitor EC2, the other end of the twelfth resistor R12 is connected with one end of the nineteenth resistor R19, and the negative electrode of the second electrolytic capacitor EC2 is respectively connected with the other end of the nineteenth resistor R19 and the negative output end of the rectifying part.

3. The wireless drive circuit for a lamp according to claim 1, characterized in that, the constant voltage conversion unit includes a first control chip U1, a transformer TR1, a second field effect transistor Q2 and a post-stage output part. The pin 1 of the first control chip U1 is connected to the fast start unit. The pin 6 of the first control chip U1 is connected to the gate of the second field effect transistor Q2. The pin 4 of the first control chip U1 is connected to the source of the second field effect transistor Q2. The primary winding of the transformer TR1 is respectively connected to the drain of the second field effect transistor Q2. The secondary winding of the transformer TR1 is connected to the post-stage output part. The auxiliary winding of the transformer TR1 is respectively connected to the pin 2 of the first control chip U1 and the wireless power supply unit.

4. The wireless drive circuit for a lamp according to claim 3, characterized in that, the wireless power supply unit includes a second control chip U2. The pin 2 of the second control chip U2 is connected to the auxiliary winding of the transformer TR1. The pin 6 of the second control chip U2 is connected to the wireless radio frequency unit.

5. The wireless drive circuit for a lamp according to claim 4, characterized in that, the wireless radio frequency unit includes a third control chip U3. The pin 8 of the third control chip U3 is connected to the pin 6 of the second control chip U2. The pins 5, 6, 7, 13 and 14 of the third control chip U3 are respectively connected to the light source output unit group.

6. The wireless drive circuit for a lamp according to claim 5, characterized in that, the light source output unit group includes a warm light output circuit, a cold light output circuit, a red light output circuit, a green light output circuit and a blue light output circuit. The warm light output circuit, the cold light output circuit, the red light output circuit, the green light output circuit and the blue light output circuit are sequentially connected to the pins 6, 5, 13, 7 and 14 of the third control chip U3.

7. The wireless drive circuit for a lamp according to claim 6, characterized in that, the warm light output circuit includes a fourth control chip U4, a fourth field effect transistor Q4, a warm light positive output terminal and a warm light negative output terminal. The pin 1 of the fourth control chip U4 is connected to the pin 6 of the third control chip U3. The pin 4 of the fourth control chip U4 is connected to the gate of the fourth field effect transistor Q4. The source of the fourth field effect transistor Q4 is grounded. The drain of the fourth field effect transistor Q4 is connected to the warm light negative output terminal. The pin 8 of the fourth control chip U4 is respectively connected to the post-stage output part and the warm light positive output terminal; The cold light output circuit includes a fifth control chip U5, a fifth field effect transistor Q5, a cold light positive output terminal, and a cold light negative output terminal. Pin 1 of the fifth control chip U5 is connected to pin 5 of the third control chip U3. Pin 4 of the fifth control chip U5 is connected to the gate of the fifth field effect transistor Q5. The source of the fifth field effect transistor Q5 is grounded. The drain of the fifth field effect transistor Q5 is connected to the cold light negative output terminal. Pin 8 of the fifth control chip U5 is respectively connected to the post-stage output section and the cold light positive output terminal; The red light output circuit includes a sixth control chip U6, a sixth field effect transistor Q6, a red light positive output terminal, and a red light negative output terminal. Pin 1 of the sixth control chip U6 is connected to pin 13 of the third control chip U3. Pin 4 of the sixth control chip U6 is connected to the gate of the sixth field effect transistor Q6. The source of the sixth field effect transistor Q6 is grounded. The drain of the sixth field effect transistor Q6 is connected to the red light negative output terminal. Pin 8 of the sixth control chip U6 is respectively connected to the post-stage output section and the red light positive output terminal; The green light output circuit includes a seventh control chip U7, a seventh field effect transistor Q7, a green light positive output terminal, and a green light negative output terminal. Pin 1 of the seventh control chip U7 is connected to pin 7 of the third control chip U3. Pin 4 of the seventh control chip U7 is connected to the gate of the seventh field effect transistor Q7. The source of the seventh field effect transistor Q7 is grounded. The drain of the seventh field effect transistor Q7 is connected to the green light negative output terminal. Pin 8 of the seventh control chip U7 is respectively connected to the post-stage output section and the green light positive output terminal; The blue light output circuit includes an eighth control chip U8, an eighth field effect transistor Q8, a blue light positive output terminal, and a blue light negative output terminal. Pin 1 of the eighth control chip U8 is connected to pin 14 of the third control chip U3. Pin 4 of the eighth control chip U8 is connected to the gate of the eighth field effect transistor Q8. The source of the eighth field effect transistor Q8 is grounded. The drain of the eighth field effect transistor Q8 is connected to the blue light negative output terminal. Pin 8 of the eighth control chip U8 is respectively connected to the post-stage output section and the blue light positive output terminal.

8. A PCB board, characterized in that, the PCB board is printed with the wireless driving circuit of the lamp as described in any one of claims 1-7.

9. A driving power supply, characterized in that, the driving power supply uses the wireless driving circuit of the lamp as described in any one of claims 1-7 for working control.

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