Double-master-control D4i dimming power supply

Abstract

The invention discloses a double-master-control D4i dimming power supply which comprises an input electrical parameter detection module, a power conversion module, a primary side master control module, a secondary side master control module, a dimming output module, an output electrical parameter detection module and a DALI dimming module. The power conversion module is respectively connected with the primary side main control module, the secondary side main control module and the load; the primary side main control module is connected with the secondary side main control module and the DALI dimming module. The primary side main control module is used for receiving a dimming instruction from an upper computer or a dimmer, reporting a power supply state and sending a control instruction to the secondary side main control module, and the secondary side main control module is used for feeding back and outputting an electrical parameter and a load state to the primary side main control module; by adopting primary side and secondary side double master control, different systems in the power supply are effectively reduced, wiring is facilitated, meanwhile, the number of components is reduced, and low-cost and miniaturized design is more facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of LED dimming driving power supply and switching power supply, and in particular to a dual-master-controlled D4i dimming power supply. Background Art

[0002] In the LED lighting industry, DALI digital dimming is widely welcomed by consumers for its strong anti-interference ability and ease of use. As a supplement and upgrade of the DALI protocol, D4i allows users to view more LED power status and information and provides a built-in bus power supply. However, due to the increase in functions, the circuit structure is becoming more and more complex, resulting in increased design difficulty, increased volume, and rising costs. Therefore, a dual-master D4i dimming power supply is urgently needed. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a dual-master D4i dimming power supply.

[0004] An embodiment of the present invention solves the technical problem by adopting a technical solution: a dual-master D4i dimming power supply, including an input filter module, an input electrical parameter detection module, a power conversion module, a primary-side master control module, a secondary-side master control module, a dimming output module, an output electrical parameter detection module and a DALI dimming module; The input filter module is connected to the external power supply; The input electrical parameter detection module is respectively connected to the input filter module, the power conversion module and the primary side main control module; The power conversion module is connected to the primary side main control module, the secondary side main control module and the load respectively; The primary side master control module is connected to the secondary side master control module and the DALI dimming module respectively; The dimming output module is connected to the secondary side main control module, the power conversion module and the load respectively; The output electrical parameter detection module is connected to the secondary side main control module, the power conversion module and the load respectively; The primary side main control module is used to receive dimming instructions from the host computer or dimmer, report the power status and send control instructions to the secondary side main control module. The secondary side main control module is used to feedback the output electrical parameters and load status to the primary side main control module.

[0005] As one of the preferred embodiments of the present invention, the power conversion module includes a PFC circuit, an LLC circuit and a feedback circuit. The PFC circuit and the LLC circuit are sequentially connected between the input electrical parameter detection module and the load and connected to the primary side main control module. The feedback circuit is connected between the primary side main control module and the secondary side main control module.

[0006] As one of the preferred embodiments of the present invention, the PFC circuit includes an inductor T1, a diode D1, a diode D3, resistors R1-R2, resistors R7-R8, a capacitor EC1, a capacitor C4 and a MOS tube Q1, one end of the inductor T1 is respectively connected to the input electrical parameter detection module and the anode of the diode D1, the other end of the inductor T1 is respectively connected to the anode of the diode D3, one end of the resistor R2 and the drain of the MOS tube Q1, the cathode of the diode D1 is respectively connected to one end of the circuit EC1, the cathode of the diode D3 and the LLC circuit, the gate of the MOS tube Q1 is connected to the primary side main control module via the resistor R7, the source of the MOS tube Q1 is respectively connected to one end of the resistor R8, one end of the capacitor C4 and the PGND end, the other end of the resistor R2 is connected to the other end of the capacitor C4, the other end of the capacitor EC1 is connected to the PGND end, and the other end of the resistor R8 is connected to the CGND end.

[0007] As one of the preferred embodiments of the present invention, the LLC circuit includes MOS tubes Q2-Q3, resistors R3-R6, resistor R9, resistors R12-R13, capacitors C1-C2, capacitor C5, capacitor MPP1, capacitor EC3, capacitor EC5, diode D4, diode D7 and transformer T2, the gate of the MOS tube Q2 is respectively connected to one end of the resistor R1 and one end of the resistor R4, the drain of the MOS tube Q2 is respectively connected to the PFC circuit, one end of the capacitor C1 and one end of the capacitor C2, the source of the MOS tube Q2 is respectively connected to one end of the resistor R4, the drain of the MOS tube Q3, one end of the resistor R3, one end of the capacitor C5 and one end of the primary winding of the transformer T2, one end of the capacitor C2 is connected to the other end of the resistor R3, the gate of the MOS tube Q3 is respectively connected to one end of the resistor R5 and one end of the resistor R9, and the source of the MOS tube Q3 is respectively connected to one end of the resistor R5 and one end of the resistor R9. The electrodes are respectively connected to the other end of resistor R9, one end of resistor R6, one end of resistor R12 and the PGND end, the other end of resistor R6 is connected to the other end of capacitor C5, the other end of resistor R12 is respectively connected to the primary main control module and one end of capacitor MPP1, the other end of capacitor MPP1 is connected to the other end of the primary winding of transformer T2, the other end of resistor R5 and the other end of resistor R1 are connected to the primary main control module, the first end of the secondary winding of transformer T2 is respectively connected to one end of the load and one end of capacitor EC3 via diode D4, the second end of the secondary winding of transformer T2 is respectively connected to the other end of capacitor EC3, one end of capacitor EC5 and one end of resistor R13, the third end of the secondary winding of transformer T2 is respectively connected to the other end of capacitor EC5 and the VOUT end via diode D7, and the other end of resistor R13 is connected to the other end of the load.

[0008] As one of the preferred embodiments of the present invention, the feedback circuit includes an optical coupler DU1, an operational amplifier U3A-U3B, a resistor R18, a resistor R23-R24, a resistor R26-R27, a resistor R29-R34, a capacitor C8, a capacitor C10, a capacitor C12-C13, a capacitor C16-C17 and a diode D8-D9; One end of the photocoupler DU1 light receiver is respectively connected to one end of the capacitor C10 and the primary side main control module, one end of the photocoupler DU1 light emitter is respectively connected to one end of the resistor R26 and one end of the resistor R29, the other end of the resistor R26 is connected to the VOUT end, the other end of the photocoupler DU1 light emitter is respectively connected to the anode of the diode D9, the other end of the resistor R29 and the anode of the diode D8, the cathode of the diode D9 is respectively connected to one end of the capacitor C13 and the output end of the operational amplifier U3A, the positive input end of the operational amplifier U3A is connected to the reference voltage VREF, and the reverse input end of the operational amplifier U3A is respectively connected to the resistor R18. one end of the operational amplifier U3A is connected to the VOUT terminal, one end of the resistor R18 is connected to the other end of the capacitor C13, the other end of the resistor R31 is connected to the VOUT terminal, the other end of the resistor R32 is respectively connected to one end of the capacitor C17 and one end of the resistor R33, the other end of the resistor R33 is connected to the secondary side main control module, the other end of the resistor R34 is respectively connected to the other end of the capacitor C17 and the SGND terminal, the power supply terminal of the operational amplifier U3A is connected to the VOUT terminal and is connected to the SGND terminal via the capacitor C16, and the ground terminal of the operational amplifier U3A is connected to the SGND terminal; The cathode of diode D8 is connected to the output end of operational amplifier U3B and is respectively connected to the reverse input end of operational amplifier U3B and resistor R24 ​​via capacitor C8 and resistor R23. The other end of resistor R24 ​​is connected to the SGND end. The forward input end of operational amplifier U3B is respectively connected to one end of resistor R27, one end of resistor R30 and one end of capacitor C12. The other end of resistor R27 is connected to the CSGND end. The other end of resistor R30 is connected to the reference voltage VREF. The other end of capacitor C12 is connected to the SGND end. The other end of the optocoupler DU1 light receiver and the other end of capacitor C10 are connected to the PGND end.

[0009] As one of the preferred embodiments of the present invention, the output electrical parameter detection module includes a signal amplifying chip U2, a resistor R14, a capacitor C6, a capacitor C11, resistors R21-R22 and a resistor R28, one end of the resistor R14 is connected to the power conversion module, the other end of the resistor R14 is respectively connected to the load and the IN+ pin of the signal amplifying chip U2, the OUT pin of the signal amplifying chip U2 is respectively connected to one end of the capacitor C6 and the secondary side main control module via the resistor R21, the VCC pin of the signal amplifying chip U2 is respectively connected to one end of the capacitor C11 and the power supply S3V3, the IN- pin of the signal amplifying chip U2 is respectively connected to the other end of the capacitor C11 and the SGND end, one end of the resistor R22 is connected to the VOUT end, the other end of the resistor R22 is respectively connected to one end of the resistor R28 and the secondary side main control module, the other end of the resistor R28, the GND pin of the signal amplifying chip U2 and the other end of the capacitor C6 are connected to the SGND end.

[0010] As one of the preferred embodiments of the present invention, an isolation communication module is provided between the primary-side main control module and the secondary-side main control module.

[0011] As one of the preferred embodiments of the present invention, the isolation communication module includes optocouplers DU2-DU3 and resistors R36-R39, one end of the optocoupler DU2 light emitter is connected to the power supply P3V3 via resistor R36, the other end of the optocoupler DU2 light emitter is connected to the primary side main control module, one end of the optocoupler DU2 light receiver is connected to the SGND end, the other end of the optocoupler DU2 light receiver is connected to the secondary side main control module and connected to the power supply S3V3 via resistor R37, one end of the optocoupler DU3 light receiver is connected to the PGND end, the other end of the optocoupler DU3 light receiver is connected to the primary side main control module and connected to the power supply P3V3 via resistor R39, one end of the optocoupler DU3 light emitter is connected to the secondary side main control module, and the other end of the optocoupler DU3 light emitter is connected to the power supply S3V3 via resistor R38.

[0012] A dual-master D4i dimming power supply also includes a first power supply module connected to an input electrical parameter detection module, a power conversion module, a primary-side master control module, and a DALI dimming module respectively.

[0013] As one of the preferred embodiments of the present invention, a dual-master D4i dimming power supply further includes a second power supply module connected to the power conversion module and the secondary-side master control module respectively.

[0014] As one of the preferred embodiments of the present invention, a dual-master D4i dimming power supply further includes an NFC module connected to the primary-side master control module.

[0015] The beneficial effects of the present invention are as follows: a dual-master D4i dimming power supply, comprising an input filter module, an input electrical parameter detection module, a power conversion module, a primary-side master control module, a secondary-side master control module, a dimming output module, an output electrical parameter detection module and a DALI dimming module; the power conversion module is respectively connected to the primary-side master control module, the secondary-side master control module and the load; the primary-side master control module is respectively connected to the secondary-side master control module and the DALI dimming module; the primary-side master control module is used to receive dimming instructions from a host computer or a dimmer, report power supply status and send control instructions to the secondary-side master control module, and the secondary-side master control module is used to feed back output electrical parameters and load status to the primary-side master control module; by adopting dual primary and secondary master controls, different systems inside the power supply are effectively reduced, wiring is facilitated, and the number of components is also reduced, which is more conducive to low-cost and miniaturized design. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which: Figure 1 It is a circuit schematic diagram of a dual-master D4i dimming power supply; Figure 2 It is the circuit schematic diagram of the power conversion module; Figure 3 It is the schematic diagram of the first part of the circuit of the power conversion module; Figure 4 The second part of the circuit schematic diagram of the power conversion module; Figure 5 It is the circuit schematic diagram of the third part of the power conversion module; Figure 6 This is the circuit schematic diagram of the dimming output module; Figure 7 It is the circuit schematic diagram of the output electrical parameter detection module; Figure 8 This is the circuit schematic diagram of the primary side main control module; Fig. 9 A circuit schematic diagram of the first power supply module; Fig.10 This is the circuit schematic diagram of the secondary side main control module; Fig.11 is a circuit schematic diagram of the second power supply module; Fig.12 This is the circuit schematic diagram of the isolated communication module. DETAILED DESCRIPTION

[0017] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0018] In the description of the present invention, the meaning of "above", "below", "exceed", etc. is not inclusive of the number itself, and the meaning of "above", "below", "within", etc. is inclusive of the number itself. If there is a description of "first" or "second", it is only used to distinguish the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0019] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0020] In the present invention, unless otherwise clearly defined, the words "set", "install", "connect" and the like should be understood in a broad sense, for example, they can be directly connected or indirectly connected through an intermediate medium; they can be fixedly connected or detachably connected or integrally formed; they can be mechanically connected; they can be the internal connection of two elements or the interaction relationship between two elements. Those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0021] Reference Figures 1 to 12 A dual-master D4i dimming power supply includes an input electrical parameter detection module 10, a power conversion module 20, a primary side master control module 30, a secondary side master control module 40, a dimming output module 50, an output electrical parameter detection module 60 and a DALI dimming module 70; The input electrical parameter detection module 10 is connected to the external power supply, the power conversion module 20 and the primary side main control module 30 respectively; The power conversion module 20 is respectively connected to the primary side main control module 30, the secondary side main control module 40 and the load; The primary side main control module 30 is connected to the secondary side main control module 40 and the DALI dimming module 70 respectively; The dimming output module 50 is connected to the secondary side main control module 40, the power conversion module 20 and the load respectively; The output electrical parameter detection module 60 is respectively connected to the secondary side main control module 40, the power conversion module 20 and the load; The primary side main control module 30 is used to receive dimming instructions from the host computer or dimmer, report the power status and send control instructions to the secondary side main control module 40. The secondary side main control module 40 is used to feedback output electrical parameters and load status to the primary side main control module 30.

[0022] 1) Reference Figure 1-Figure 2 The city power enters the input electrical parameter detection module 10 after passing through the input filter module 94, and the input voltage waveform is rectified into a steamed wave, and the current waveform is raised into a sine wave with a positive bias and transmitted to the primary main control module 30. After the algorithm processing of the primary main control module 30, the input voltage signal, current signal, grid frequency, voltage and current phase angle, power factor, input power, etc. can be obtained, and then after passing through the power conversion module 20, a stable direct current is output.

[0023] 2) Reference Figure 1-Figure 5 In some embodiments, the power conversion module 20 includes a PFC circuit 21, an LLC circuit 22 and a feedback circuit 23. The PFC circuit 21 and the LLC circuit 22 are sequentially connected between the input electrical parameter detection module 10 and the load and connected to the primary side main control module 30. The feedback circuit 23 is connected between the primary side main control module 30 and the secondary side main control module 40.

[0024] As a preferred embodiment of the PFC circuit 21, the PFC circuit 21 includes an inductor T1, a diode D1, a diode D3, resistors R1-R2, resistors R7-R8, a capacitor EC1, a capacitor C4 and a MOS tube Q1. One end of the inductor T1 is respectively connected to the input electrical parameter detection module 10 and the anode of the diode D1, the other end of the inductor T1 is respectively connected to the anode of the diode D3, one end of the resistor R2 and the drain of the MOS tube Q1, the cathode of the diode D1 is respectively connected to one end of the circuit EC1, the cathode of the diode D3 and the LLC circuit 22, the gate of the MOS tube Q1 is connected to the primary side main control module 30 via the resistor R7, the source of the MOS tube Q1 is respectively connected to one end of the resistor R8, one end of the capacitor C4 and the PGND end, the other end of the resistor R2 is connected to the other end of the capacitor C4, the other end of the capacitor EC1 is connected to the PGND end, and the other end of the resistor R8 is connected to the CGND end.

[0025] As a preferred embodiment of the LLC circuit 22, the LLC circuit 22 includes MOS tubes Q2-Q3, resistors R3-R6, resistor R9, resistors R12-R13, capacitors C1-C2, capacitor C5, capacitor MPP1, capacitor EC3, capacitor EC5, diode D4, diode D7 and transformer T2. The gate of the MOS tube Q2 is respectively connected to one end of the resistor R1 and one end of the resistor R4, the drain of the MOS tube Q2 is respectively connected to the PFC circuit 21, one end of the capacitor C1 and one end of the capacitor C2, the source of the MOS tube Q2 is respectively connected to one end of the resistor R4, the drain of the MOS tube Q3, one end of the resistor R3, one end of the capacitor C5 and one end of the primary winding of the transformer T2, one end of the capacitor C2 is connected to the other end of the resistor R3, the gate of the MOS tube Q3 is respectively connected to one end of the resistor R5 and one end of the resistor R9, and the The source is respectively connected to the other end of resistor R9, one end of resistor R6, one end of resistor R12 and the PGND end, the other end of resistor R6 is connected to the other end of capacitor C5, the other end of resistor R12 is respectively connected to the primary side main control module 30 and one end of capacitor MPP1, the other end of capacitor MPP1 is connected to the other end of the primary winding of transformer T2, the other end of resistor R5 and the other end of resistor R1 are connected to the primary side main control module 30, the first end of the secondary winding of transformer T2 is respectively connected to one end of the load and one end of capacitor EC3 via diode D4, the second end of the secondary winding of transformer T2 is respectively connected to the other end of capacitor EC3, one end of capacitor EC5 and one end of resistor R13, the third end of the secondary winding of transformer T2 is respectively connected to the other end of capacitor EC5 and the VOUT end via diode D7, and the other end of resistor R13 is connected to the other end of the load.

[0026] As a preferred embodiment of the feedback circuit 23, the feedback circuit 23 includes an optical coupler DU1, an operational amplifier U3A-U3B, a resistor R18, a resistor R23-R24, a resistor R26-R27, a resistor R29-R34, a capacitor C8, a capacitor C10, a capacitor C12-C13, a capacitor C16-C17 and a diode D8-D9; one end of the optical coupler DU1 light receiver is respectively connected to one end of the capacitor C10 and the primary side main control module 30, one end of the optical coupler DU1 light emitter is respectively connected to one end of the resistor R26 and one end of the resistor R29, and the resistor R The other end of 26 is connected to the VOUT terminal, the other end of the light emitter of the optocoupler DU1 is respectively connected to the anode of the diode D9, the other end of the resistor R29 and the anode of the diode D8, the cathode of the diode D9 is respectively connected to one end of the capacitor C13 and the output end of the operational amplifier U3A, the positive input end of the operational amplifier U3A is connected to the reference voltage VREF, the reverse input end of the operational amplifier U3A is respectively connected to one end of the resistor R18, one end of the resistor R31, one end of the resistor R32 and one end of the resistor R34, the other end of the resistor R18 is respectively connected to the capacitor C1 3, the other end of the resistor R31 is connected to the VOUT terminal, the other end of the resistor R32 is respectively connected to one end of the capacitor C17 and one end of the resistor R33, the other end of the resistor R33 is connected to the secondary side main control module 40, the other end of the resistor R34 is respectively connected to the other end of the capacitor C17 and the SGND terminal, the power supply terminal of the operational amplifier U3A is connected to the VOUT terminal and is connected to the SGND terminal via the capacitor C16, and the ground terminal of the operational amplifier U3A is connected to the SGND terminal; the cathode of the diode D8 is connected to the output terminal of the operational amplifier U3B to And through capacitor C8 and resistor R23, they are respectively connected to the reverse input terminal of operational amplifier U3B and resistor R24. The other end of resistor R24 ​​is connected to the SGND terminal. The positive input terminal of operational amplifier U3B is respectively connected to one end of resistor R27, one end of resistor R30 and one end of capacitor C12. The other end of resistor R27 is connected to the CSGND terminal. The other end of resistor R30 is connected to the reference voltage VREF. The other end of capacitor C12 is connected to the SGND terminal. The other end of the optocoupler DU1 light receiver and the other end of capacitor C10 are connected to the PGND terminal.

[0027] Specifically, the PFC circuit 21 is mainly composed of an inductor T1, a MOS tube Q1, a diode D3, etc., which is used for boosting and power factor correction; the LLC circuit 22 is mainly composed of a transformer T2, a MOS tube Q2, a MOS tube Q3, a capacitor MPP1, a resistor R12, etc., which is used for front-end and back-end isolation and step-down output; the feedback circuit 23 is centered on the operational amplifier U3A and the operational amplifier U3B, detects and feeds back the output voltage and the total output current, and controls the operating frequency of the MOS tube Q2 and the MOS tube Q3 to achieve the purpose of controlling the total output power and stabilizing the voltage; further, the current limiting signal of the resistor R13 entering the operational amplifier U3B is a negative value, and its reference point SGND is consistent with the voltage loop and the ground reference point of the secondary side main control module 40, so that the secondary side main control module 40 does not need to use a differential form to check the signal sampling of the resistor R14, that is, the signal amplification chip U2 can use a non-differential form for sampling.

[0028] 3) Reference Figure 1-Figure 2 , Figure 6 In some embodiments, the dimming output module 50 includes a MOS tube Q4 and a driving amplifier circuit 51, the source of the MOS tube Q4 is connected to the output end of the power conversion module 20, the drain of the MOS tube Q4 is connected to the load, the gate of the MOS tube Q4 is connected to the driving amplifier circuit 51, and the driving amplifier circuit 51 is connected to the secondary side main control module 40, which can realize chopping dimming.

[0029] 4) Reference Figure 1-Figure 2 , Figure 7 In some embodiments, the output electrical parameter detection module 60 includes a signal amplifier chip U2, a resistor R14, a capacitor C6, a capacitor C11, resistors R21-R22 and a resistor R28, one end of the resistor R14 is connected to the power conversion module 20, the other end of the resistor R14 is respectively connected to the load and the IN+ pin of the signal amplifier chip U2, the OUT pin of the signal amplifier chip U2 is respectively connected to one end of the capacitor C6 and the secondary side main control module 40 through the resistor R21, the VCC pin of the signal amplifier chip U2 is respectively connected to one end of the capacitor C11 and the power supply S3V3, the IN- pin of the signal amplifier chip U2 is respectively connected to the other end of the capacitor C11 and the SGND end, one end of the resistor R22 is connected to the VOUT end, the other end of the resistor R22 is respectively connected to one end of the resistor R28 and the secondary side main control module 40, the other end of the resistor R28, the GND pin of the signal amplifier chip U2 and the other end of the capacitor C6 are connected to the SGND end.

[0030] Specifically, the signal amplifier chip U2, the resistor R14, the resistor R21, and the capacitor C11 constitute a current detection circuit 61, and the resistor R22 and the resistor R28 constitute a voltage detection circuit 62, wherein the resistor R14 is a sampling resistor of the output current, and the current signal is transmitted to the secondary side main control module 40 through filtering and amplification of the signal amplifier chip U2, thereby realizing the detection of the output current; the voltage divider circuit composed of the resistor R22 and the resistor R28 is used to detect the output voltage and send it to the secondary side main control module 40; by detecting the input voltage and the output current, the output power can be calculated. When the output power exceeds the rated output power, the dimming duty cycle will be reduced, thereby reducing the output power.

[0031] 4) Reference Figure 1-Figure 2 , Fig.12 In some embodiments, an isolation communication module 80 is provided between the primary side main control module 30 and the secondary side main control module 40; as a preferred embodiment of the isolation communication module 80, the isolation communication module 80 includes an optocoupler DU2-DU3 and resistors R36-R39, one end of the optocoupler DU2 light emitter is connected to the power supply P3V3 via the resistor R36, the other end of the optocoupler DU2 light emitter is connected to the primary side main control module 30, one end of the optocoupler DU2 light receiver is connected to the SGND end, the other end of the optocoupler DU2 light receiver is connected to the secondary side main control module 40 and connected to the power supply S3V3 via the resistor R37, one end of the optocoupler DU3 light receiver is connected to the PGND end, the other end of the optocoupler DU3 light receiver is connected to the primary side main control module 30 and connected to the power supply P3V3 via the resistor R39, one end of the optocoupler DU3 light emitter is connected to the secondary side main control module 40, and the other end of the optocoupler DU3 light emitter is connected to the power supply S3V3 via the resistor R38; isolation communication between the front and rear stages can be realized.

[0032] 5) Reference Figure 1-Figure 2 , Fig. 9 In some embodiments, a dual-master D4i dimming power supply further includes a first power supply module 91 connected to the input electrical parameter detection module 10, the power conversion module 20, the primary side master control module 30, and the DALI dimming module 70 respectively.

[0033] As a preferred embodiment of the first power supply module 91, the first power supply module 91 includes a transformer T1, a control chip U6, a step-down circuit 911, diodes D11-D15, resistors R40-R41, resistors R43-R45, capacitors C18-C20 and capacitors EC7-EC8, the anode of the diode D11 is connected to the V_boost end, the cathode of the diode D11 is respectively connected to the fourth end of the transformer T1, one end of the resistor R40, one end of the capacitor C18, one end of the capacitor C19, the cathode of the diode D12 and one end of the resistor R41, the anode of the diode D12 is connected to the V_HV end, the first end of the transformer T1 is respectively connected to the anode of the diode D14 and the 5th and 6th pins of the control chip U6, the cathode of the diode D14 is connected to the other end of the resistor R40 and the other end of the capacitor C18, the other end of the capacitor C19 is connected to the 8th pin of the control chip U6 and the PGND end, and the second end of the transformer T1 is connected to the V_HV end via the diode D13. The DALI dimming module 70 is connected to the third end of the transformer T1, the other end of the resistor R41 is respectively connected to the cathode of the diode D15, one end of the capacitor EC7, the step-down circuit 911 and the first pin of the control chip U6, the anode of the diode D15 is respectively connected to one end of the resistor R44 and the fifth end of the transformer T1, the other end of the resistor R44 is respectively connected to one end of the capacitor C20, one end of the resistor R45 and the second pin of the control chip U6, the other end of the capacitor C20 and the other end of the resistor R45 are respectively connected to one end of the resistor R43 and the PGND end, the other end of the resistor R43 is connected to the fourth pin of the control chip U6, the other end of the capacitor EC7 is respectively connected to the step-down circuit 911, the eighth end of the transformer T1 and the PGND end, one end of the capacitor EC9 is respectively connected to the step-down circuit 911 and the power supply P3V3, and the other end of the capacitor EC8 is respectively connected to the step-down circuit 911 and the PGND end.

[0034] Specifically, the output of the first power supply module 91 comes from two parts, one is the cathode of the diode D11 connected to the anode of the boosted capacitor EC1, and the other is the cathode of the diode D12 connected to the input end of the transformer T1, which can achieve a quick start under cold machine; the first power supply module 91 provides two voltage sources, the first one is LLC_18V, which is used to power the primary side main control module 30, and the second one is to power the DALI dimming module 70.

[0035] 6) Reference Figure 1-Figure 2 , Fig.11 In some embodiments, a dual-master D4i dimming power supply also includes a second power supply module 92 connected to the power conversion module 20 and the secondary-side master control module 40 respectively; specifically, the second power supply module 92 is a BUCK circuit, which is a post-stage power supply module, and supplies power to the secondary-side master control module 40 after stepping down the voltage.

[0036] 7) Reference Figure 1-Figure 2 In some embodiments, the function of the DALI dimming module 70 is to process the signal entering the dimmer, convert it into a level that can be received by the primary side main control module 30, and output the voltage signal input by the first power supply module 91 after reducing the voltage and limiting the current to avoid damaging the DALI communication circuit.

[0037] 8) Reference Figure 1-Figure 2 In some embodiments, a dual-master D4i dimming power supply also includes an NFC module 93 connected to the primary master control module 30; used to store the power supply status to facilitate the reset of the turntable after power-on and power-off, and change the output characteristics of the power supply through the NFC module 93, including but not limited to output voltage, output current, output power, dimming curve, communication address, temperature protection threshold, etc.

[0038] 9) Reference Figure 1-Figure 2 In some embodiments, the functions of the primary side main control module 30 are: 1. Control the working state of the power conversion module 20 by outputting a PWM waveform, so that the output voltage VOUT is always at a stable voltage, thereby achieving voltage reduction and voltage regulation; 2. Receive and send signals through the isolation communication module 80 to communicate with the secondary side main control module 40 of the subsequent stage, so as to achieve the purpose of controlling dimming and output state information interaction; 3. Process the voltage signal and current signal input by the input electrical parameter detection module 10, and calculate the input electrical parameter signal of the power supply; 4. Process the dimmer signal input by the DALI dimming module 70; and the secondary side main control module 40 controls the dimming duty cycle according to the signal transmitted by the primary side main control module 30, and feeds back the output state to the primary side main control module 30.

[0039] 10) The advantages of the present invention are: by adopting dual master control on the primary and secondary sides, different ground systems inside the power supply are effectively reduced, wiring is facilitated, and the number of components is reduced, which is more conducive to low-cost and miniaturized design.

[0040] Of course, the present invention is not limited to the above-mentioned embodiments, and those skilled in the art may make equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications and substitutions are all included in the scope defined by the claims of this application.

Claims

1. A dual-master D4i dimming power supply, characterized by: It comprises an input filtering module (94), an input electrical parameter detection module (10), a power conversion module (20), a primary side main control module (30), a secondary side main control module (40), a dimming output module (50), an output electrical parameter detection module (60) and a DALI dimming module (70); The input filter module (94) is connected to an external power supply; The input electrical parameter detection module (10) is respectively connected to the input filter module (94), the power conversion module (20) and the primary side main control module (30); The power conversion module (20) is respectively connected to the primary side main control module (30), the secondary side main control module (40) and the load; The primary side main control module (30) is connected to the secondary side main control module (40) and the DALI dimming module (70) respectively; The dimming output module (50) is respectively connected to the secondary side main control module (40), the power conversion module (20) and the load; The output electrical parameter detection module (60) is respectively connected to the secondary side main control module (40), the power conversion module (20) and the load; The primary side main control module (30) is used to receive dimming instructions from a host computer or a dimmer, report power supply status, and send control instructions to the secondary side main control module (40), and the secondary side main control module (40) is used to feed back output electrical parameters and load status to the primary side main control module (30).

2. The dual-master D4i dimming power supply according to claim 1, characterized in that: The power conversion module (20) comprises a PFC circuit (21), an LLC circuit (22) and a feedback circuit (23); the PFC circuit (21) and the LLC circuit (22) are connected in sequence between the input electrical parameter detection module (10) and the load and connected to the primary side main control module (30); and the feedback circuit (23) is connected between the primary side main control module (30) and the secondary side main control module (40).

3. The dual-master D4i dimming power supply according to claim 2, characterized in that: The PFC circuit (21) comprises an inductor T1, a diode D1, a diode D3, resistors R1-R2, resistors R7-R8, a capacitor EC1, a capacitor C4 and a MOS transistor Q1; one end of the inductor T1 is respectively connected to the input electrical parameter detection module (10) and the anode of the diode D1; the other end of the inductor T1 is respectively connected to the anode of the diode D3, one end of the resistor R2 and the drain of the MOS transistor Q1; the cathode of the diode D1 is respectively connected to one end of the circuit EC1, the cathode of the diode D3 and the LLC circuit (22); the gate of the MOS transistor Q1 is connected to the primary side main control module (30) via the resistor R7; the source of the MOS transistor Q1 is respectively connected to one end of the resistor R8, one end of the capacitor C4 and the PGND terminal; the other end of the resistor R2 is connected to the other end of the capacitor C4; the other end of the capacitor EC1 is connected to the PGND terminal; and the other end of the resistor R8 is connected to the CGND terminal.

4. The dual-master D4i dimming power supply according to claim 2, characterized in that: The LLC circuit (22) comprises MOS transistors Q2-Q3, resistors R3-R6, resistor R9, resistors R12-R13, capacitors C1-C2, capacitor C5, capacitor MPP1, capacitor EC3, capacitor EC5, diode D4, diode D7 and transformer T2, the gate of the MOS transistor Q2 being respectively connected to one end of the resistor R1 and one end of the resistor R4, the drain of the MOS transistor Q2 being respectively connected to the PFC circuit (21), one end of the capacitor C1 and one end of the capacitor C2, the source of the MOS transistor Q2 being respectively connected to one end of the resistor R4, the drain of the MOS transistor Q3, one end of the resistor R3, one end of the capacitor C5 and one end of the primary winding of the transformer T2, one end of the capacitor C2 being connected to the other end of the resistor R3, the gate of the MOS transistor Q3 being respectively connected to one end of the resistor R5 and one end of the resistor R9, the source of the MOS transistor Q3 being respectively connected to the resistor R 9, one end of the resistor R6, one end of the resistor R12 and the PGND end are connected, the other end of the resistor R6 is connected to the other end of the capacitor C5, the other end of the resistor R12 is respectively connected to the primary side main control module (30) and one end of the capacitor MPP1, the other end of the capacitor MPP1 is connected to the other end of the primary winding of the transformer T2, the other end of the resistor R5 and the other end of the resistor R1 are connected to the primary side main control module (30), the first end of the secondary winding of the transformer T2 is respectively connected to one end of the load and one end of the capacitor EC3 via the diode D4, the second end of the secondary winding of the transformer T2 is respectively connected to the other end of the capacitor EC3, one end of the capacitor EC5 and one end of the resistor R13, the third end of the secondary winding of the transformer T2 is respectively connected to the other end of the capacitor EC5 and the VOUT end via the diode D7, and the other end of the resistor R13 is connected to the other end of the load.

5. The dual-master D4i dimming power supply according to claim 2, characterized in that: The feedback circuit (23) comprises an optical coupler DU1, operational amplifiers U3A-U3B, a resistor R18, resistors R23-R24, resistors R26-R27, resistors R29-R34, a capacitor C8, a capacitor C10, capacitors C12-C13, capacitors C16-C17 and diodes D8-D9; One end of the photocoupler DU1 light receiver is respectively connected to one end of the capacitor C10 and the primary side main control module (30), one end of the photocoupler DU1 light emitter is respectively connected to one end of the resistor R26 and one end of the resistor R29, the other end of the resistor R26 is connected to the VOUT end, the other end of the photocoupler DU1 light emitter is respectively connected to the anode of the diode D9, the other end of the resistor R29 and the anode of the diode D8, the cathode of the diode D9 is respectively connected to one end of the capacitor C13 and the output end of the operational amplifier U3A, the positive input end of the operational amplifier U3A is connected to the reference voltage VREF, and the negative input end of the operational amplifier U3A is respectively connected to the resistor R18. one end of the resistor R31, one end of the resistor R32 and one end of the resistor R34 are connected, the other end of the resistor R18 is connected to the other end of the capacitor C13, the other end of the resistor R31 is connected to the VOUT terminal, the other end of the resistor R32 is respectively connected to one end of the capacitor C17 and one end of the resistor R33, the other end of the resistor R33 is connected to the secondary side main control module (40), the other end of the resistor R34 is respectively connected to the other end of the capacitor C17 and the SGND terminal, the power supply terminal of the operational amplifier U3A is connected to the VOUT terminal and is connected to the SGND terminal via the capacitor C16, and the ground terminal of the operational amplifier U3A is connected to the SGND terminal; The cathode of diode D8 is connected to the output end of operational amplifier U3B and is respectively connected to the reverse input end of operational amplifier U3B and resistor R24 ​​via capacitor C8 and resistor R23. The other end of resistor R24 ​​is connected to the SGND end. The forward input end of operational amplifier U3B is respectively connected to one end of resistor R27, one end of resistor R30 and one end of capacitor C12. The other end of resistor R27 is connected to the CSGND end. The other end of resistor R30 is connected to the reference voltage VREF. The other end of capacitor C12 is connected to the SGND end. The other end of the optocoupler DU1 light receiver and the other end of capacitor C10 are connected to the PGND end.

6. The dual-master D4i dimming power supply according to claim 1, characterized in that: The output electrical parameter detection module (60) comprises a signal amplifying chip U2, a resistor R14, a capacitor C6, a capacitor C11, resistors R21-R22 and a resistor R28, one end of the resistor R14 is connected to the power conversion module (20), the other end of the resistor R14 is respectively connected to the load and the IN+ pin of the signal amplifying chip U2, the OUT pin of the signal amplifying chip U2 is respectively connected to one end of the capacitor C6 and the secondary side main control module (40) via the resistor R21, the VCC pin of the signal amplifying chip U2 is respectively connected to one end of the capacitor C11 and the power supply S3V3, the IN- pin of the signal amplifying chip U2 is respectively connected to the other end of the capacitor C11 and the SGND terminal, one end of the resistor R22 is connected to the VOUT terminal, the other end of the resistor R22 is respectively connected to one end of the resistor R28 and the secondary side main control module (40), and the other end of the resistor R28, the GND pin of the signal amplifying chip U2 and the other end of the capacitor C6 are connected to the SGND terminal.

7. The dual-master D4i dimming power supply according to claim 1, characterized in that: An isolation communication module (80) is provided between the primary side main control module (30) and the secondary side main control module (40).

8. The dual-master D4i dimming power supply according to claim 7, characterized in that: The isolated communication module (80) comprises optical couplers DU2-DU3 and resistors R36-R39, one end of the optical coupler DU2 light emitter is connected to the power supply P3V3 via the resistor R36, the other end of the optical coupler DU2 light emitter is connected to the primary side main control module (30), one end of the optical coupler DU2 light receiver is connected to the SGND end, the other end of the optical coupler DU2 light receiver is connected to the secondary side main control module (40) and connected to the power supply S3V3 via the resistor R37, one end of the optical coupler DU3 light receiver is connected to the PGND end, the other end of the optical coupler DU3 light receiver is connected to the primary side main control module (30) and connected to the power supply P3V3 via the resistor R39, one end of the optical coupler DU3 light emitter is connected to the secondary side main control module (40), and the other end of the optical coupler DU3 light receiver is connected to the power supply S3V3 via the resistor R38.

9. The dual-master D4i dimming power supply according to claim 1, characterized in that: It also comprises a first power supply module (91) connected to the input electrical parameter detection module (10), the power conversion module (20), the primary side main control module (30), and the DALI dimming module (70) respectively.

10. The dual-master D4i dimming power supply according to claim 1, characterized in that: It also includes a second power supply module (92) connected to the power conversion module (20) and the secondary side main control module (40) respectively.

11. The dual-master D4i dimming power supply according to claim 1, characterized in that: It also includes an NFC module (93) connected to the primary-side main control module (30).

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