Light controller

Abstract

The utility model discloses a light controller, which comprises a dimming and color adjusting module, the dimming and color adjusting module comprises a full-bridge dimming circuit, the full-bridge dimming circuit comprises a first dimming output end, a second dimming output end, a first MOS tube, a second MOS tube, a third MOS tube and a fourth MOS tube, and the positive electrode of the output end of a power supply module is connected with the drain electrode of the first MOS tube and the drain electrode of the second MOS tube. The negative electrode of the output end of the power module is connected with the source electrode of the third MOS transistor and the source electrode of the fourth MOS transistor, the full-bridge dimming circuit further comprises two first driving circuits and two second driving circuits, the output ends of the two first driving circuits are connected with the grid electrode of the first MOS transistor and the grid electrode of the fourth MOS transistor respectively, and the output ends of the two second driving circuits are connected with the grid electrode of the third MOS transistor and the grid electrode of the fourth MOS transistor respectively. The output ends of the two second driving circuits are connected with the grid electrode of the second MOS tube and the grid electrode of the third MOS tube respectively, the source electrode of the first MOS tube and the drain electrode of the third MOS tube are both connected with the first dimming output end, and the source electrode of the second MOS tube and the drain electrode of the fourth MOS tube are both connected with the second dimming output end. The light controller can realize double-wire system light modulation and color modulation.

Description

Technical Field

[0001] The utility model relates to the technical field of lighting, in particular to a lighting controller. Background Art

[0002] With the continuous development of lighting technology, dimming and color-adjusting lamps are widely welcomed in the market. Existing dimming and color-adjusting lamps need to be wired through three or four wires to achieve the dimming and color-adjusting function by adjusting the voltage of two light strings with different color temperatures. As a result, the wiring of existing dimming and color-adjusting lamps occupies a large space. When the dimming and color-adjusting lamps are applied to thin lamps or panel furniture, there is a problem of wiring difficulties. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a lighting controller to solve the problem that the wiring of existing dimming and color-adjusting lamps occupies a large space.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is as follows: a light controller includes a power module, a main control module and a dimming and color adjustment module, the power module is connected to the main control module and the dimming and color adjustment module, the main control module is connected to the dimming and color adjustment module, the dimming and color adjustment module includes a full-bridge dimming circuit, the full-bridge dimming circuit includes a first dimming output end, a second dimming output end, a first MOS tube, a second MOS tube, a third MOS tube and a fourth MOS tube, the output end positive electrode of the power module is connected to the drain of the first MOS tube and the drain of the second MOS tube, the output end of the power module is connected to the drain of the first MOS tube and the drain of the second MOS tube, The negative electrode is connected to the source of the third MOS tube and the source of the fourth MOS tube. The full-bridge dimming circuit also includes two first drive circuits and two second drive circuits. The output ends of the two first drive circuits are respectively connected to the gate of the first MOS tube and the gate of the fourth MOS tube, and the output ends of the two second drive circuits are respectively connected to the gate of the second MOS tube and the gate of the third MOS tube. The source of the first MOS tube and the drain of the third MOS tube are both connected to the first dimming output end, and the source of the second MOS tube and the drain of the fourth MOS tube are both connected to the second dimming output end.

[0005] Furthermore, the first drive circuit and the second drive circuit both include a first resistor, a second resistor, a third resistor, a first transistor and a second transistor, one end of the first resistor is connected to one end of the second resistor, the other end of the first resistor is respectively connected to the collector of the first transistor and the base of the second transistor, the other end of the second resistor is connected to one end of the third resistor and the collector of the second transistor, and the other end of the third resistor is the output end of the first drive circuit or the second drive circuit.

[0006] Furthermore, it also includes a protection circuit, the input end of the protection circuit is connected to the source ends of the third MOS tube and the fourth MOS tube, the protection circuit includes a first output interface and a second output interface, the first output interface is connected to the two first drive circuits, and the second output interface is connected to the two second drive circuits.

[0007] Furthermore, the protection circuit includes a first operational amplifier, a second operational amplifier and a diode, the non-inverting input terminal of the first operational amplifier is connected to the source terminals of the third MOS tube and the fourth MOS tube, the inverting input terminal of the first operational amplifier is connected to the output terminal of the first operational amplifier and the inverting input terminal of the second operational amplifier, the output terminal of the first operational amplifier is connected to the anode terminal of the diode, the cathode terminal of the diode is connected to the non-inverting input terminal of the second operational amplifier, and the first output interface and the second output interface are both connected to the inverting output terminal of the second operational amplifier.

[0008] Furthermore, it also includes a feedback circuit, the main control module includes a first main control chip and a second main control chip, the input end of the feedback circuit is connected to the dimming and color adjustment module, the output end of the feedback circuit is connected to the feedback end of the first main control chip, the driving end of the first main control chip is connected to the dimming and color adjustment module, and the second main control chip is connected to the power supply module.

[0009] Furthermore, the feedback circuit includes an optical coupler, a first capacitor, a second capacitor, a fourth resistor, a fifth resistor, a sixth resistor and a voltage-stabilizing diode. The optical coupler includes a light-emitting diode located on the primary side and an optical signal converter located on the secondary side. The optical signal converter is connected to the feedback end of the first main control chip. The input end of the feedback circuit is respectively connected to one end of the first capacitor, one end of the second capacitor, one end of the fourth resistor, one end of the sixth resistor, and the anode end of the light-emitting diode. The cathode end of the light-emitting diode is respectively connected to the other end of the fourth resistor, one end of the fifth resistor, the other end of the second capacitor, and the cathode end of the voltage-stabilizing diode. The other end of the fifth resistor is connected to the other end of the first capacitor. The anode end of the voltage-stabilizing diode is respectively connected to the other end of the sixth resistor and one end of the second capacitor.

[0010] Furthermore, the dimming and color adjustment module also includes a common-mode inductor, a first input end of the common-mode inductor is connected to the source of the first MOS tube and the drain of the third MOS tube, a second input end of the common-mode inductor is connected to the source of the second MOS tube and the drain of the fourth MOS tube, a first output end of the common-mode inductor is the first dimming output end, and a second output end of the common-mode inductor is the second dimming output end.

[0011] Furthermore, the power module includes a rectifier circuit, an AC-DC circuit and a step-down circuit, the rectifier circuit is connected to the AC-DC circuit, and the AC-DC circuit is connected to the step-down circuit.

[0012] Furthermore, it also includes a light-emitting module, which includes a cold color temperature light string, a warm color temperature light string, a first constant current circuit and a second constant current circuit, the first dimming output end is connected to the first constant current circuit, the first constant current circuit is connected to the positive end of the cold color temperature light string, the second dimming output end is connected to the second constant current circuit; the second constant current circuit is connected to the positive end of the warm color temperature light string.

[0013] Furthermore, the dimming and color adjustment module also includes a dimming control port, a first output end of the dimming control port is connected to the two first driving circuits, and a second output end of the dimming control port is connected to the two second driving circuits.

[0014] The beneficial effects of the present invention are as follows: the lighting controller described in the present invention can generate a first PWM signal and a second PWM signal through a main control module, so as to adjust the power-on time ratio and frequency of the first dimming output terminal and the second dimming output terminal through the above two PWM signals, thereby realizing color temperature adjustment. The lighting controller can realize two-wire color temperature regulation to save space for arranging wiring harnesses of dimming lamps; in addition, the lighting controller has high reliability and stability, which is beneficial to solving the flicker problem of dimming and color-adjusting lamps; in addition, the lighting controller can add an anti-dead zone short-circuit time to the first PWM signal and the second PWM signal through the main control module to avoid short circuit caused by the physical switching speed difference of the MOS tube in the full-bridge dimming circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A circuit schematic diagram of a lighting controller according to the utility model in one embodiment;

[0016] Figure 2 for Figure 1 The circuit schematic diagram of the dimming and color adjustment module;

[0017] Figure 3 A schematic diagram of a light module circuit of a light controller according to the utility model in one embodiment;

[0018] Figure 4 It is a dimming output end expansion interface of the lighting controller described in the utility model in one embodiment;

[0019] Figure 5 for Figure 1 Circuit diagram of the protection circuit;

[0020] Figure 6 for Figure 1 Circuit diagram of the feedback circuit;

[0021] Figure 7 for Figure 1 Circuit schematic diagram of the power module and the main control module.

[0022] Description of labels:

[0023] 1. Power module;

[0024] 2. Main control module;

[0025] 3. Dimming and color adjustment module; 31. Full-bridge dimming circuit; 32. First drive circuit; 33. Second drive circuit;

[0026] 4. Protection circuit;

[0027] 5. Feedback circuit;

[0028] 6. Light-emitting module; 61. Cold color temperature light string; 62. Warm color temperature light string; 63. First constant current circuit; 64. Second constant current circuit. DETAILED DESCRIPTION

[0029] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in conjunction with the implementation modes and the accompanying drawings.

[0030] Please refer to Figures 1 to 7 , a light controller, comprising a power module 1, a main control module 2 and a dimming and color adjustment module 3, wherein the power module 1 is connected to the main control module 2 and the dimming and color adjustment module 3, the main control module 2 is connected to the dimming and color adjustment module 3, the dimming and color adjustment module 3 comprises a full-bridge dimming circuit 31, the full-bridge dimming circuit 31 comprises a first dimming output terminal, a second dimming output terminal, a first MOS tube, a second MOS tube, a third MOS tube and a fourth MOS tube, the positive electrode of the output terminal of the power module 1 is connected to the drain of the first MOS tube and the drain of the second MOS tube, the negative electrode of the output terminal of the power module 1 is connected to the negative electrode of the third MOS tube The full-bridge dimming circuit 31 further comprises two first driving circuits 32 and two second driving circuits 33, the output ends of the two first driving circuits 32 are respectively connected to the gate of the first MOS tube and the gate of the fourth MOS tube, the output ends of the two second driving circuits 33 are respectively connected to the gate of the second MOS tube and the gate of the third MOS tube, the source of the first MOS tube and the drain of the third MOS tube are both connected to the first dimming output end, and the source of the second MOS tube and the drain of the fourth MOS tube are both connected to the second dimming output end.

[0031] The working principle of the utility model is briefly described as follows: in actual application, the first dimming output end of the light controller described in the utility model is used to output a positive voltage to the cold color temperature light string 61, and the second dimming output end is used to output a positive voltage to the warm color temperature light string 62. When the first MOS tube and the fourth MOS tube are turned on at the same time, the cold color temperature light string 61 is lit, and when the second MOS tube and the third MOS tube are turned on at the same time, the warm color temperature light string 62 is lit; the main control module 2 can generate a first PWM signal for controlling the power-on time of the cold color temperature light string 61 and a second PWM signal for controlling the power-on time of the warm color temperature light string 62, wherein the first drive circuit 32 is used to receive the first PWM signal and output it to the first MOS tube or the fourth MOS tube, and the second drive circuit 33 is used to receive the second PWM signal and output it to the second MOS tube or the third MOS tube. The light controller can realize the dimming and color adjustment function by adjusting the first PWM signal and the second PWM signal to adjust the power-on time ratio of the cold color temperature light string 61 and the warm color temperature light string 62.

[0032] From the above description, it can be seen that the beneficial effects of the present invention are: the lighting controller described in the present invention can generate a first PWM signal and a second PWM signal through the main control module 2, so as to adjust the power-on time ratio and frequency of the first dimming output terminal and the second dimming output terminal through the above two PWM signals, thereby realizing color temperature adjustment. The lighting controller can realize two-wire color temperature control to save space for arranging wiring harnesses of dimming lamps; in addition, the lighting controller has high reliability and stability, which is beneficial to solving the flicker problem of dimming and color-adjusting lamps; in addition, the lighting controller can add an anti-dead zone short-circuit time to the first PWM signal and the second PWM signal through the main control module 2 to avoid short circuit caused by the physical switching speed difference of the MOS tube in the full-bridge dimming circuit 31.

[0033] Furthermore, the first driving circuit 32 and the second driving circuit 33 both include a first resistor, a second resistor, a third resistor, a first transistor and a second transistor, one end of the first resistor is connected to one end of the second resistor, the other end of the first resistor is respectively connected to the collector of the first transistor and the base of the second transistor, the collector of the second transistor is connected to the other end of the second resistor and one end of the third resistor, and the other end of the third resistor is the output end of the first driving circuit 32 or the second driving circuit 33.

[0034] It can be seen from the above description that the first driving circuit 32 and the second driving circuit 33 are both used to receive PWM signals, and process the PWM signals and then send them to the gates of the MOS transistors connected to the driving circuits.

[0035] Furthermore, it also includes a protection circuit 4, the input end of the protection circuit 4 is connected to the source ends of the third MOS tube and the fourth MOS tube, the protection circuit 4 includes a first output interface and a second output interface, the first output interface is connected to the two first drive circuits 32, and the second output interface is connected to the two second drive circuits 33.

[0036] Furthermore, the protection circuit 4 includes a first operational amplifier, a second operational amplifier and a diode, the non-inverting input terminal of the first operational amplifier is connected to the source terminals of the third MOS tube and the fourth MOS tube, the inverting input terminal of the first operational amplifier is connected to the output terminal of the first operational amplifier and the inverting input terminal of the second operational amplifier, the output terminal of the first operational amplifier is connected to the anode terminal of the diode D1, the cathode terminal of the diode D1 is connected to the non-inverting input terminal of the second operational amplifier, and the first output interface and the second output interface are both connected to the reverse output terminal of the second operational amplifier.

[0037] Furthermore, it also includes a feedback circuit 5, the main control module 2 includes a first main control chip and a second main control chip, the input end of the feedback circuit 5 is connected to the dimming and color adjustment module 3, the output end of the feedback circuit 5 is connected to the feedback end of the first main control chip, the driving end of the first main control chip is connected to the dimming and color adjustment module 3, and the second main control chip is connected to the power supply module 1.

[0038] Furthermore, the feedback circuit 5 includes an optical coupler, a first capacitor, a second capacitor, a fourth resistor, a fifth resistor, a sixth resistor and a voltage-stabilizing diode. The optical coupler includes a light-emitting diode located on the primary side and an optical signal converter located on the secondary side. The optical signal converter is connected to the feedback end of the first main control chip. The input end of the feedback circuit 5 is respectively connected to one end of the first capacitor, one end of the second capacitor, one end of the fourth resistor, one end of the sixth resistor, and the anode end of the light-emitting diode. The cathode end of the light-emitting diode is respectively connected to the other end of the fourth resistor, one end of the fifth resistor, the other end of the second capacitor, and the cathode end of the voltage-stabilizing diode. The other end of the fifth resistor is connected to the other end of the first capacitor. The anode end of the voltage-stabilizing diode is respectively connected to the other end of the sixth resistor and one end of the second capacitor.

[0039] As can be seen from the above description, the feedback circuit 5 can collect the electrical parameters of the full-bridge dimming circuit 31 from the first main control chip and feed back the electrical parameters of the full-bridge dimming circuit 31 to the first main control chip. The first main control chip can specifically use a control chip with a model of CR6863B, and the first main control chip can generate a first PWM signal and a second PWM signal according to the electrical parameters of the full-bridge dimming circuit 31, and the first main control chip can add an anti-dead zone short-circuit time to the first PWM signal and the second PWM signal to avoid the full-bridge dimming circuit 31 from causing a short circuit due to the physical switching speed difference of the MOS tube. The second main control chip can specifically use an LED drive switch lighting power supply chip with a model of IC-OB6561 to control the power module 1 through the LED drive switch lighting power supply chip.

[0040] Furthermore, the dimming and color adjustment module 3 also includes a common-mode inductor, a first input end of the common-mode inductor is connected to the source of the first MOS tube and the drain of the third MOS tube, a second input end of the common-mode inductor is connected to the source of the second MOS tube and the drain of the fourth MOS tube, a first output end of the common-mode inductor is the first dimming output end, and a second output end of the common-mode inductor is the second dimming output end.

[0041] It can be known from the above description that the common mode inductor is used to suppress common mode interference, so as to reduce the flicker of the light emitting module 6 at the first dimming output end and the second dimming output end.

[0042] Furthermore, the power module 1 includes a rectifier circuit, an AC-DC circuit and a step-down circuit, the rectifier circuit is connected to the AC-DC circuit, and the AC-DC circuit is connected to the step-down circuit.

[0043] From the above description, it can be seen that the power module 1 can convert 220V AC voltage into 400V DC voltage through the rectifier circuit and AC-DC circuit, and then step down the 400V DC voltage into 12V / 24V DC voltage through the step-down circuit, and output the 12V / 24V DC voltage to the dimming and color adjustment module.

[0044] Furthermore, it also includes a light-emitting module 6, which includes a cold color temperature light string 61, a warm color temperature light string 62, a first constant current circuit 63 and a second constant current circuit 64, the first dimming output end is connected to the first constant current circuit 63, the first constant current circuit 63 is connected to the positive end of the cold color temperature light string 61, the second dimming output end is connected to the second constant current circuit 64; the second constant current circuit 64 is connected to the positive end of the warm color temperature light string 62.

[0045] Specifically, the output end of the cold color temperature light string 61 is connected to the second dimming output end, and the output end of the warm color temperature light string 62 is connected to the first dimming output end.

[0046] As can be seen from the above description, the first constant current circuit 63 and the second constant current circuit 64 are added to the cold color temperature light string 61 and the warm color temperature light string 62 respectively, which can avoid the problem of inconsistent brightness of the same group of light strings due to line loss in the low voltage circuit.

[0047] Furthermore, the dimming and color adjustment module 3 also includes a dimming control port, a first output end of the dimming control port is connected to the two first driving circuits 32 , and a second output end of the dimming control port is connected to the two second driving circuits 33 .

[0048] Embodiment 1

[0049] Please refer to Figures 1 to 7 , Embodiment 1 of the present utility model is: a lighting controller, comprising a power module 1, a main control module 2 and a dimming and color adjustment module 3, the power module 1 is connected to the main control module 2 and the dimming and color adjustment module 3, and the main control module 2 is connected to the dimming and color adjustment module 3.

[0050] Please refer to Figure 2 In the first embodiment, the dimming and color adjustment module 3 includes a full-bridge dimming circuit 31, and the full-bridge dimming circuit 31 includes a first dimming output terminal LEDA, a second dimming output terminal LEDB, a first MOS tube Q17, a second MOS tube Q18, a third MOS tube Q19 and a fourth MOS tube Q20. The positive electrode of the output terminal of the power module 1 is connected to the drain of the first MOS tube Q17 and the drain of the second MOS tube Q18, and the negative electrode of the output terminal of the power module 1 is connected to the source of the third MOS tube Q19 and the source of the fourth MOS tube Q20. The full-bridge dimming circuit 3 1 also includes two first drive circuits 32 and two second drive circuits 33, the output ends of the two first drive circuits 32 are respectively connected to the gate of the first MOS tube Q17 and the gate of the fourth MOS tube Q20, the output ends of the two second drive circuits 33 are respectively connected to the gate of the second MOS tube and the gate of the third MOS tube, the source of the first MOS tube Q17 and the drain of the third MOS tube Q19 are both connected to the first dimming output terminal LEDA, and the source of the second MOS tube and the drain of the fourth MOS tube are both connected to the second dimming output terminal LEDB.

[0051] Specifically, in the first embodiment, the first MOS transistor Q17 and the second MOS transistor Q18 are P-type MOS transistors, and the third MOS transistor Q19 and the fourth MOS transistor Q20 are N-type MOS transistors.

[0052] In the first embodiment, in order to suppress common-mode interference, the dimming and color adjustment module 3 also includes a common-mode inductor LF3, a first input end of the common-mode inductor LF3 is connected to the source of the first MOS tube Q17 and the drain of the third MOS tube Q19, a second input end of the common-mode inductor LF3 is connected to the source of the second MOS tube Q18 and the drain of the fourth MOS tube Q20, a first output end of the common-mode inductor LF3 is the first dimming output end LEDA, and a second output end of the common-mode inductor LF3 is the second dimming output end LEDB.

[0053] Specifically, the first dimming output terminal LEDA and the second dimming output terminal LEDB can be connected as follows: Figure 3 The light-emitting module 6 shown in the figure includes a cold color temperature light string 61, a warm color temperature light string 62, a first constant current circuit 63 and a second constant current circuit 64. The first dimming output terminal LEDA is connected to the first constant current circuit 63, the first constant current circuit 63 is connected to the positive terminal of the cold color temperature light string 61, and the negative terminal of the cold color temperature light string 61 is connected to the second dimming output terminal LEDB, so that the source terminal of the first MOS tube Q17 provides a positive voltage for the cold color temperature light string 61, and the drain terminal of the fourth MOS tube Q20 provides a negative voltage for the cold color temperature light string 61; the second dimming output terminal LEDB is connected to the first constant current circuit 63; the first constant current circuit 63 is connected to the positive terminal of the warm color temperature light string 62, and the negative terminal of the warm color temperature light string 62 is connected to the first dimming output terminal LEDA, so that the source terminal of the second MOS tube provides a positive voltage for the warm color temperature light string 62, and the drain terminal of the third MOS tube provides a negative voltage for the warm color temperature light string 62. In addition, the first constant current circuit 63 and the second constant current circuit 64 are respectively added to the cold color temperature light string 61 and the warm color temperature light string 62, which can avoid the problem of inconsistent brightness of the same group of light strings due to line loss of the low voltage circuit.

[0054] As a preferred embodiment, the lighting controller described in the first embodiment can also be implemented as follows: Figure 4 The dimming output expansion interface shown is used to expand the number of light source modules that can be connected to the lighting controller, which can facilitate centralized control of the light sources in the whole house in practical applications.

[0055] Please refer to Figure 6 and Figure 7As shown, the protection circuit 4 is also included, the input end of the protection circuit 4 is connected to the source end of the third MOS tube Q19 and the source end of the fourth MOS tube Q20, the protection circuit 4 includes a first output interface P1OFF and a second output interface P2OFF, the first output interface P1OFF is connected to the two first drive circuits 32, and the second output interface P2OFF is connected to the two second drive circuits 33. Specifically, the protection circuit 4 includes a first operational amplifier U2A, a second operational amplifier U2B and a diode D2, the non-inverting input end of the first operational amplifier U2A is connected to the source of the third MOS tube Q19 and the fourth MOS tube Q20, the inverting input end of the first operational amplifier U2A is connected to the output end of the first operational amplifier U2A and the inverting input end of the second operational amplifier U2B, the output end of the first operational amplifier U2A is connected to the anode end of the diode D2, the cathode end of the diode D1 is connected to the non-inverting input end of the second operational amplifier U2B, and the first output interface P1OFF and the second output interface P2OFF are both connected to the reverse output end of the second operational amplifier U2B.

[0056] Please refer to Figure 6 and Figure 7 In the first embodiment, a feedback circuit 5 is also included. The main control module 2 includes a first main control chip and a second main control chip. The first main control chip specifically adopts a control chip with a model number of CR6863B. The input end of the feedback circuit 5 is connected to the dimming and color adjustment module 3. The output end of the feedback circuit 5 is connected to the FB pin and the CS pin of the first main control chip. The pin GA and the pin COMP of the first main control chip are connected to the dimming and color adjustment module 3, so that the first main control chip can generate a first PWM signal and a second PWM signal for the dimming and color adjustment module. The second main control chip can specifically select an LED drive switch lighting power supply chip with a model number of IC-OB6561 to control the power supply module 1.

[0057] In the first embodiment, the light controller can add an anti-dead-zone short-circuit time to the first PWM signal and the second PWM signal through the first main control chip to prevent the full-bridge dimming circuit 31 from short-circuiting due to the physical switching speed difference of the MOS tube.

[0058] Specifically, Figure 6As shown, the feedback circuit 5 includes an optical coupler, a first capacitor C21, a second capacitor C22, a fourth resistor R69, a fifth resistor R73, a sixth resistor R78 and a voltage regulator diode U5. The optical coupler includes a light emitting diode U4A located on the primary side and an optical signal converter U4B located on the secondary side. The two ends of the optical signal converter U4B are respectively connected to the FB pin and the CS pin of the first main control chip. The input end U4B of the feedback circuit 5 is respectively connected to one end of the first capacitor C21, one end of the second capacitor C22, one end of the fourth resistor R69, one end of the sixth resistor R78, and the anode end of the light emitting diode U4A. The cathode end of the light emitting diode U4A is respectively connected to the other end of the fourth resistor 69, one end of the fifth resistor R73, the other end of the second capacitor C22, and the cathode end of the voltage regulator diode U5. The other end of the fifth resistor 73 is connected to the other end of the first capacitor C21. The anode end of the voltage regulator diode U5 is respectively connected to the other end of the sixth resistor R69 and one end of the second capacitor C22.

[0059] In this embodiment 1, if Figure 7 As shown, the power module 1 includes a rectifier circuit, an AC-DC circuit and a step-down circuit. The rectifier circuit is connected to the AC-DC circuit. The rectifier circuit and the AC-DC circuit convert the 220V AC voltage into 400V DC through rectification and power factor correction. The AC-DC circuit is connected to the step-down circuit to step down the 400V DC voltage output by the AC-DC circuit to 12V / 24V DC voltage.

[0060] In the first embodiment, the dimming and color adjustment module 3 further includes a dimming control port, a first output end of the dimming control port is connected to two first drive circuits 32 , and a second output end of the dimming control port is connected to two second drive circuits 33 .

[0061] In summary, the lighting controller described in the present invention can generate a first PWM signal and a second PWM signal through the main control module 2, so as to adjust the power-on time ratio and frequency of the first dimming output terminal and the second dimming output terminal through the above two PWM signals, thereby realizing color temperature adjustment. The lighting controller can realize two-wire color temperature control to save space for arranging wiring harnesses of dimming lamps; in addition, the lighting controller has high reliability and stability, which is beneficial to solving the flicker problem of dimming and color-adjusting lamps; in addition, the lighting controller can add an anti-dead zone short-circuit time to the first PWM signal and the second PWM signal through the main control module 2 to avoid short circuit caused by the physical switching speed difference of the MOS tube in the full-bridge dimming circuit 31.

[0062] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. A lighting controller, characterized in that: The invention comprises a power module, a main control module and a dimming and color adjustment module, wherein the power module is connected to the main control module and the dimming and color adjustment module, and the main control module is connected to the dimming and color adjustment module. The dimming and color adjustment module comprises a full-bridge dimming circuit, and the full-bridge dimming circuit comprises a first dimming output terminal, a second dimming output terminal, a first MOS tube, a second MOS tube, a third MOS tube and a fourth MOS tube. The positive electrode of the output terminal of the power module is connected to the drain of the first MOS tube and the drain of the second MOS tube, and the negative electrode of the output terminal of the power module is connected to the source of the third MOS tube and the source of the fourth MOS tube. The full-bridge dimming circuit also comprises two first driving circuits and two second driving circuits, wherein the output terminals of the two first driving circuits are respectively connected to the gate of the first MOS tube and the gate of the fourth MOS tube, and the output terminals of the two second driving circuits are respectively connected to the gate of the second MOS tube and the gate of the third MOS tube, the source of the first MOS tube and the drain of the third MOS tube are both connected to the first dimming output terminal, and the source of the second MOS tube and the drain of the fourth MOS tube are both connected to the second dimming output terminal.

2. The lighting controller according to claim 1, characterized in that: The first driving circuit and the second driving circuit both include a first resistor, a second resistor, a third resistor, a first transistor and a second transistor. One end of the first resistor is connected to one end of the second resistor, and the other end of the first resistor is respectively connected to the collector of the first transistor and the base of the second transistor. The other end of the second resistor is connected to one end of the third resistor and the collector of the second transistor. The other end of the third resistor is the output end of the first driving circuit or the second driving circuit.

3. The lighting controller according to claim 1, characterized in that: It also includes a protection circuit, the input end of the protection circuit is connected to the source ends of the third MOS tube and the fourth MOS tube, the protection circuit includes a first output interface and a second output interface, the first output interface is connected to the two first drive circuits, and the second output interface is connected to the two second drive circuits.

4. The lighting controller according to claim 3, characterized in that: The protection circuit includes a first operational amplifier, a second operational amplifier and a diode, the non-inverting input terminal of the first operational amplifier is connected to the source terminals of the third MOS tube and the fourth MOS tube, the inverting input terminal of the first operational amplifier is connected to the output terminal of the first operational amplifier and the inverting input terminal of the second operational amplifier, the output terminal of the first operational amplifier is connected to the anode terminal of the diode, the cathode terminal of the diode is connected to the non-inverting input terminal of the second operational amplifier, and the first output interface and the second output interface are both connected to the inverting output terminal of the second operational amplifier.

5. The lighting controller according to claim 1, characterized in that: It also includes a feedback circuit, the main control module includes a first main control chip and a second main control chip, the input end of the feedback circuit is connected to the dimming and color adjustment module, the output end of the feedback circuit is connected to the feedback end of the first main control chip, the driving end of the first main control chip is connected to the dimming and color adjustment module, and the second main control chip is connected to the power supply module.

6. The lighting controller according to claim 5, characterized in that: The feedback circuit includes an optical coupler, a first capacitor, a second capacitor, a fourth resistor, a fifth resistor, a sixth resistor and a voltage-stabilizing diode. The optical coupler includes a light-emitting diode located on the primary side and an optical signal converter located on the secondary side. The optical signal converter is connected to the feedback end of the first main control chip. The input end of the feedback circuit is respectively connected to one end of the first capacitor, one end of the second capacitor, one end of the fourth resistor, one end of the sixth resistor, and the anode end of the light-emitting diode. The cathode end of the light-emitting diode is respectively connected to the other end of the fourth resistor, one end of the fifth resistor, the other end of the second capacitor, and the cathode end of the voltage-stabilizing diode. The other end of the fifth resistor is connected to the other end of the first capacitor. The anode end of the voltage-stabilizing diode is respectively connected to the other end of the sixth resistor and one end of the second capacitor.

7. The lighting controller according to claim 1, characterized in that: The dimming and color adjustment module also includes a common-mode inductor, a first input end of the common-mode inductor is connected to the source of the first MOS tube and the drain of the third MOS tube, a second input end of the common-mode inductor is connected to the source of the second MOS tube and the drain of the fourth MOS tube, a first output end of the common-mode inductor is the first dimming output end, and a second output end of the common-mode inductor is the second dimming output end.

8. The lighting controller according to claim 1, characterized in that: The power supply module includes a rectifier circuit, an AC-DC circuit and a step-down circuit. The rectifier circuit is connected to the AC-DC circuit, and the AC-DC circuit is connected to the step-down circuit.

9. The lighting controller according to claim 1, characterized in that: It also includes a light-emitting module, which includes a cold color temperature light string, a warm color temperature light string, a first constant current circuit and a second constant current circuit, the first dimming output end is connected to the first constant current circuit, the first constant current circuit is connected to the positive end of the cold color temperature light string, the second dimming output end is connected to the second constant current circuit; the second constant current circuit is connected to the positive end of the warm color temperature light string.

10. The lighting controller according to claim 1, characterized in that: The dimming and color adjustment module further includes a dimming control port, a first output end of the dimming control port is connected to the two first driving circuits, and a second output end of the dimming control port is connected to the two second driving circuits.

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