A dimming system based on direct current PLC constant current decoding driver

Abstract

The utility model belongs to the technical field of light regulation, specifically relates to a dimming system based on DC PLC constant current decoding driver, the dimming system includes RS485, signal loader, DC PLC constant current decoding driver and light load, RS485 is connected with signal loader, signal loader is connected with a plurality of DC PLC constant current decoding driver in parallel, address dial code is added in DC PLC constant current decoding driver, and each DC PLC constant current decoding driver is connected with one light load, the utility model discloses a light regulation of existing use RS485 is all full -automatic control, when the light load of one group is damaged, needs the professional person to carry out reprogramming completely, and the maintenance cost is high, and the problem of long working hours.

Description

Technical Field

[0001] This utility model belongs to the field of lighting adjustment technology, specifically relating to a dimming system based on a DC PLC constant current decoding driver. Background Technology

[0002] In the current field of lighting control, RS485-based lighting control systems are widely used. However, these systems have significant limitations. In small indoor areas such as 100-300 square meters, if lighting adjustment relies entirely on fully automatic control, while this provides convenient centralized management during normal operation, problems arise once one group of lighting loads fails. Due to the high integration and automation of the system, a local failure affects the control logic of the entire system. This necessitates professional intervention to reprogram the entire system. This process requires not only deep technical knowledge and extensive experience from professionals, but also involves complex and tedious reprogramming, leading to significantly increased maintenance costs and extended repair time. This situation, to some extent, limits the further promotion and application of RS485 lighting control systems, urgently requiring a new dimming system to solve these problems. Utility Model Content

[0003] This invention provides a dimming system based on a DC PLC constant current decoder driver, which solves the problem that existing lighting adjustment systems using RS485 are all fully automatic controls, and when one group of lighting loads fails, all of them need to be reprogrammed by professionals, resulting in high maintenance costs and long working hours.

[0004] This utility model is achieved through the following technical solution:

[0005] A dimming system based on a DC PLC constant current decoder driver is disclosed. The dimming system includes an RS485, a signal loader, a DC PLC constant current decoder driver, and a lighting load. The RS485 is connected to the signal loader, and the signal loader is connected in parallel with multiple DC PLC constant current decoder drivers. Address DIP switches are added to the DC PLC constant current decoder drivers, and each DC PLC constant current decoder driver is connected to a lighting load.

[0006] Furthermore, the DC PLC constant current decoder driver includes an LED constant current drive circuit, an MCU power supply circuit, an asynchronous serial digital signal detection circuit, an address DIP switch circuit, and an MCU unit;

[0007] The MCU unit is connected to the MCU power supply circuit, the address dialing circuit, the LED constant current drive circuit and the asynchronous serial digital signal detection circuit, respectively. The DC PLC constant current decoder driver is connected to the constant current loader and multiple lamps or multiple lamp groups or multiple lamp strips, respectively.

[0008] Furthermore, the LED constant current driving circuit includes a VIN+ terminal and a VIN- terminal connected to the asynchronous serial digital signal detection circuit. The VIN- terminal is connected to the anode of diode D200 and the cathode of diode D400, respectively. The VIN+ terminal is connected to the anode of diode D100 and the cathode of diode D300, respectively. The cathode of diode D200 is connected to the cathode of diode D100 and one end of inductor L1, respectively. The other end of inductor L1 is connected to the + terminal of inductor CE1, the LED + terminal, one end of inductor L2, the + terminal of inductor CE2, and one end of inductor L4, respectively. The other end of inductor L4 is connected to the LED + terminal.

[0009] The negative terminals of diode D400 and diode D300 are respectively connected to one end of inductor CE1, one end of capacitor C1, one end of resistor R2, one end of capacitor C2, terminals 1-3 of switch SW1, one end of resistor RS2, one end of capacitor C3, one end of capacitor C5, terminal 8 of chip U1, and terminal 7 of chip U1.

[0010] The other end of capacitor C1 is connected to one end of resistor R1, one end of resistor R3, and terminal 3 of chip U1; the other end of resistor R1 is connected to 5V; the other end of resistor R3 is connected to terminal 1 of chip U1; the other end of resistor R2 is connected to the other end of capacitor C2, the DIM terminal, and terminal 2 of chip U1; the other end of resistor RS2 is connected to one end of resistor RS3, one end of resistor RS4, one end of resistor RS5, and terminal 4 of chip U1; the other ends of resistor RS3, resistor RS4, and... The other end of resistor RS5 is connected to terminals 6-4 of switch SW1. Terminal 6 of chip U1 is connected to terminal 5 of chip U1, the other end of capacitor C3, the positive terminal of diode D2, one end of resistor R4, and one end of inductor L3. The other end of resistor R4 is connected to one end of capacitor C4. The other end of capacitor C4 is connected to the other end of inductor L2 and the negative terminal of diode D2. The other end of inductor L1 is connected to the negative terminal of inductor CE2, the other end of capacitor C5, the positive terminal of Zener diode ZD1, and one end of capacitor C6.

[0011] Furthermore, the positive terminal of the Zener diode ZD1 is connected to the other end of capacitor C6, one end of resistor R5, terminal 1, terminal 2, terminal 5 of chip U2, one end of resistor R6, terminal 1 and terminal 3 of chip O1, respectively. The other end of resistor R5 is connected to the LED+ terminal, and the other end of resistor R6 is connected to terminal 7, terminal 8 and C- of chip O1, respectively. The positive terminal of chip U2... Terminal 4 is connected to terminal 2 of chip O1. Terminal 5 of chip O1 is connected to terminal 6 and W- of chip O1 respectively. Terminal 4 of chip O1 is connected to terminal 3 of chip U2. Terminal 6 of chip U2 is connected to one end of resistor R7 and the CCT terminal respectively. Terminal 7 of chip U2 is connected to one end of resistor R9 and one end of capacitor C7 respectively. Terminal 8 of chip U2 is connected to the other end of resistor R7 and the ground terminal respectively.

[0012] The other end of the resistor R9 is connected to terminal 3 of the transistor Q2. Terminal 1 of the transistor Q2 is connected to the negative terminal of the Zener diode ZD2 and one end of the resistor R8. The other end of the resistor R8 is connected to terminal 2 of the transistor Q2 and LED+.

[0013] The positive terminal of the Zener diode ZD2 is grounded, and the other end of the capacitor C7 is grounded.

[0014] Furthermore, the VIN+ terminal of the asynchronous serial digital signal detection circuit is connected to the positive terminal of diode D5, the negative terminal of diode D5 is connected to one end of resistor R12, the other end of resistor R12 is connected to the negative terminal of Zener diode ZD3, and the positive terminal of Zener diode ZD3 is connected to terminal 1 of PC1.

[0015] The VIN- terminal of the asynchronous serial digital signal detection circuit is connected to terminal 3 of PC1 and then grounded.

[0016] Terminal 6 of PC1 is connected to the 5V terminal, one end of capacitor C12, one end of resistor R13, and one end of resistor R15. Terminal 6 of PC1 is connected to the other end of resistor R15, one end of capacitor C13, one end of resistor R16, and one end of resistor R14. The other end of resistor R14 is connected to the base (B) terminal of transistor Q3. The other end of resistor R15 is connected to the collector (C) terminal of transistor Q3 and terminal 3 of chip U4. The emitter (E) terminal of transistor Q3 is connected to the other ends of capacitor C12, capacitor C13, and resistor R16, and then grounded.

[0017] Furthermore, the MCU is chip U4. Terminal 1 of chip U4 is connected to resistor R21 and then to the CCT terminal. Terminal 7 of chip U4 is grounded. Terminal 9 of chip U4 is connected to the 5V terminal and one end of capacitor C15, and the other end of capacitor C15 is grounded. Terminal 17 of chip U4 is connected to resistor R22 and then to the DIM terminal. Terminal 18 of chip U4 is connected to terminal 2 of interface J1. Terminal 4 of chip U4 is connected to terminal 4 of interface J1, one end of resistor R20, and one end of capacitor C14. Terminal 8 of chip U4 is connected to terminal 5 of interface J1.

[0018] The other end of the resistor R20 is connected to the 5V terminal, and the other end of the capacitor C14 is grounded.

[0019] Furthermore, the MCU power supply circuit includes chip U3. Terminal 4 of chip U3 is connected to one end of capacitor C8 and the LED+ terminal, respectively. The other end of capacitor C8 is grounded. Terminal 5 of chip U3 is connected to one end of resistor R10. The other end of resistor R10 is connected to one end of capacitor C9, the cathode of diode D3, one end of inductor L5, terminal 2 of chip U3, and terminal 1 of chip U3.

[0020] The other end of capacitor C9 is connected to terminal 3 of chip U3 and the negative terminal of diode D4. The other end of inductor L5 is connected to the positive terminal of diode D4, one end of capacitor C10, one end of capacitor C11, one end of resistor R11 and the 5V terminal. The positive terminal of diode D3 is connected to the other end of capacitor C10, the other end of capacitor C11, the other end of resistor R11 and the ground terminal.

[0021] Furthermore, the address switching circuit includes a DIP switch SW2. Terminals 4, 5, and 6 of the DIP switch SW2 are all connected to a 5V terminal. Terminal 1 of the DIP switch SW2 is connected to terminal 13 of the chip U3 via the ADD1 terminal. Terminal 2 of the DIP switch SW2 is connected to terminal 12 of the chip U3 via the ADD2 terminal. Terminal 3 of the DIP switch SW2 is connected to terminal 11 of the chip U3 via the ADD3 terminal.

[0022] Terminal 1 of the DIP switch SW2 is also connected to one end of resistor R19, terminal 2 of the DIP switch SW2 is also connected to one end of resistor R18, terminal 3 of the DIP switch SW2 is also connected to one end of resistor R17, and the other end of resistor R19 is connected to the other ends of resistor R18 and resistor R17 respectively and then grounded.

[0023] The beneficial effects of this utility model are:

[0024] This invention provides a fast and low-cost replacement method that allows users to use lights in different scenarios and quickly replace damaged components without disrupting the original lighting usage or influencing user habits, enabling them to control the lights according to the original control method.

[0025] This invention breaks away from the traditional RS485 system's complete reliance on fully automatic control, offering greater flexibility. When a group of lights fails, there's no need for professionals to reprogram the entire system. The system itself can quickly locate the fault, requiring only targeted repair or replacement of the faulty component, significantly reducing the technical threshold and difficulty of maintenance. Secondly, this convenient fault handling method greatly reduces maintenance costs, eliminating the need for expensive professional fees and the additional costs associated with lengthy reprogramming. Furthermore, maintenance time is significantly shortened, reducing lighting interruptions caused by light failures, improving the availability and stability of the lighting system, bringing great convenience to users, and possessing wider application value in practical applications. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of this utility model.

[0027] Figure 2 This is a schematic diagram of the LED constant current drive circuit of this utility model.

[0028] Figure 3 This is a schematic diagram of the asynchronous serial digital signal detection circuit of this utility model.

[0029] Figure 4 This is a schematic diagram of the MCU power supply circuit of this utility model.

[0030] Figure 5 This is a schematic diagram of the address dialing circuit of this utility model.

[0031] Figure 6 This is a schematic diagram of the MCU unit of this utility model.

[0032] Figure 7 This is a schematic diagram of the signal loader of this utility model.

[0033] Figure 8 This is a schematic diagram A of the DC-to-AC drive circuit of the signal loader of this utility model.

[0034] Figure 9 This is a schematic diagram (B) of the DC-to-AC drive circuit for the signal loader of this utility model.

[0035] Figure 10This is a schematic diagram (C) of the DC-to-AC drive circuit for the signal loader of this utility model.

[0036] Figure 11 This is a schematic diagram of the MCU circuit for the signal loader of this utility model.

[0037] Figure 12 This is a schematic diagram of the MCU power supply circuit for the signal loader of this utility model.

[0038] Figure 13 This is a schematic diagram of the 12V power supply circuit for the signal loader of this utility model.

[0039] Figure 14 This is a schematic diagram of the address dial switch circuit of the signal loader of this utility model.

[0040] Figure 15 This is a schematic diagram of the communication interface circuit of the signal loader of this utility model.

[0041] Figure 16 This is a schematic diagram of the 0-10V adjustment circuit of the signal loader of this utility model. Detailed Implementation

[0042] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted so as not to obscure the description of this application with unnecessary detail.

[0043] It should be understood that, when used in this specification and the appended claims, the term "comprising" indicates the presence of the described features, integrals, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0044] It should also be understood that the terminology used in this application specification is for the purpose of describing particular embodiments only and is not intended to limit the application. As used in this application specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0045] The following is in conjunction with the appendix to this application specification. Figure 1-15The technical solutions in the embodiments of this application are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0046] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0047] A dimming system based on a DC PLC constant current decoder driver is disclosed. The dimming system includes an RS485, a signal loader, a DC PLC constant current decoder driver, and a lighting load. The RS485 is connected to the signal loader, and the signal loader is connected in parallel with multiple DC PLC constant current decoder drivers. Address DIP switches are added to the DC PLC constant current decoder drivers, and each DC PLC constant current decoder driver is connected to a lighting load.

[0048] Furthermore, the DC PLC constant current decoder driver includes an LED constant current drive circuit, an MCU power supply circuit, an asynchronous serial digital signal detection circuit, an address DIP switch circuit, and an MCU unit;

[0049] The MCU unit is connected to the MCU power supply circuit, the address dialing circuit, the LED constant current drive circuit and the asynchronous serial digital signal detection circuit, respectively. The DC PLC constant current decoder driver is connected to the constant current loader and multiple lamps or multiple lamp groups or multiple lamp strips, respectively.

[0050] Furthermore, the LED constant current driving circuit includes a VIN+ terminal and a VIN- terminal connected to the asynchronous serial digital signal detection circuit. The VIN- terminal is connected to the anode of diode D200 and the cathode of diode D400, respectively. The VIN+ terminal is connected to the anode of diode D100 and the cathode of diode D300, respectively. The cathode of diode D200 is connected to the cathode of diode D100 and one end of inductor L1, respectively. The other end of inductor L1 is connected to the + terminal of inductor CE1, the LED + terminal, one end of inductor L2, the + terminal of inductor CE2, and one end of inductor L4, respectively. The other end of inductor L4 is connected to the LED + terminal.

[0051] The negative terminals of diode D400 and diode D300 are respectively connected to one end of inductor CE1, one end of capacitor C1, one end of resistor R2, one end of capacitor C2, terminals 1-3 of switch SW1, one end of resistor RS2, one end of capacitor C3, one end of capacitor C5, terminal 8 of chip U1, and terminal 7 of chip U1.

[0052] The other end of capacitor C1 is connected to one end of resistor R1, one end of resistor R3, and terminal 3 of chip U1; the other end of resistor R1 is connected to 5V; the other end of resistor R3 is connected to terminal 1 of chip U1; the other end of resistor R2 is connected to the other end of capacitor C2, the DIM terminal, and terminal 2 of chip U1; the other end of resistor RS2 is connected to one end of resistor RS3, one end of resistor RS4, one end of resistor RS5, and terminal 4 of chip U1; the other ends of resistor RS3, resistor RS4, and... The other end of resistor RS5 is connected to terminals 6-4 of switch SW1. Terminal 6 of chip U1 is connected to terminal 5 of chip U1, the other end of capacitor C3, the positive terminal of diode D2, one end of resistor R4, and one end of inductor L3. The other end of resistor R4 is connected to one end of capacitor C4. The other end of capacitor C4 is connected to the other end of inductor L2 and the negative terminal of diode D2. The other end of inductor L1 is connected to the negative terminal of inductor CE2, the other end of capacitor C5, the positive terminal of Zener diode ZD1, and one end of capacitor C6.

[0053] Furthermore, the positive terminal of the Zener diode ZD1 is connected to the other end of capacitor C6, one end of resistor R5, terminal 1, terminal 2, terminal 5 of chip U2, one end of resistor R6, terminal 1 and terminal 3 of chip O1, respectively. The other end of resistor R5 is connected to the LED+ terminal, and the other end of resistor R6 is connected to terminal 7, terminal 8 and C- of chip O1, respectively. The positive terminal of chip U2... Terminal 4 is connected to terminal 2 of chip O1. Terminal 5 of chip O1 is connected to terminal 6 and W- of chip O1 respectively. Terminal 4 of chip O1 is connected to terminal 3 of chip U2. Terminal 6 of chip U2 is connected to one end of resistor R7 and the CCT terminal respectively. Terminal 7 of chip U2 is connected to one end of resistor R9 and one end of capacitor C7 respectively. Terminal 8 of chip U2 is connected to the other end of resistor R7 and the ground terminal respectively.

[0054] The other end of the resistor R9 is connected to terminal 3 of the transistor Q2. Terminal 1 of the transistor Q2 is connected to the negative terminal of the Zener diode ZD2 and one end of the resistor R8. The other end of the resistor R8 is connected to terminal 2 of the transistor Q2 and LED+.

[0055] The positive terminal of the Zener diode ZD2 is grounded, and the other end of the capacitor C7 is grounded.

[0056] Furthermore, the VIN+ terminal of the asynchronous serial digital signal detection circuit is connected to the positive terminal of diode D5, the negative terminal of diode D5 is connected to one end of resistor R12, the other end of resistor R12 is connected to the negative terminal of Zener diode ZD3, and the positive terminal of Zener diode ZD3 is connected to terminal 1 of PC1.

[0057] The VIN- terminal of the asynchronous serial digital signal detection circuit is connected to terminal 3 of PC1 and then grounded.

[0058] Terminal 6 of PC1 is connected to the 5V terminal, one end of capacitor C12, one end of resistor R13, and one end of resistor R15. Terminal 6 of PC1 is connected to the other end of resistor R15, one end of capacitor C13, one end of resistor R16, and one end of resistor R14. The other end of resistor R14 is connected to the base (B) terminal of transistor Q3. The other end of resistor R15 is connected to the collector (C) terminal of transistor Q3 and terminal 3 of chip U4. The emitter (E) terminal of transistor Q3 is connected to the other ends of capacitor C12, capacitor C13, and resistor R16, and then grounded.

[0059] Furthermore, the MCU is chip U4. Terminal 1 of chip U4 is connected to resistor R21 and then to the CCT terminal. Terminal 7 of chip U4 is grounded. Terminal 9 of chip U4 is connected to the 5V terminal and one end of capacitor C15, and the other end of capacitor C15 is grounded. Terminal 17 of chip U4 is connected to resistor R22 and then to the DIM terminal. Terminal 18 of chip U4 is connected to terminal 2 of interface J1. Terminal 4 of chip U4 is connected to terminal 4 of interface J1, one end of resistor R20, and one end of capacitor C14. Terminal 8 of chip U4 is connected to terminal 5 of interface J1.

[0060] The other end of the resistor R20 is connected to the 5V terminal, and the other end of the capacitor C14 is grounded.

[0061] Furthermore, the MCU power supply circuit includes chip U3. Terminal 4 of chip U3 is connected to one end of capacitor C8 and the LED+ terminal, respectively. The other end of capacitor C8 is grounded. Terminal 5 of chip U3 is connected to one end of resistor R10. The other end of resistor R10 is connected to one end of capacitor C9, the cathode of diode D3, one end of inductor L5, terminal 2 of chip U3, and terminal 1 of chip U3.

[0062] The other end of capacitor C9 is connected to terminal 3 of chip U3 and the negative terminal of diode D4. The other end of inductor L5 is connected to the positive terminal of diode D4, one end of capacitor C10, one end of capacitor C11, one end of resistor R11 and the 5V terminal. The positive terminal of diode D3 is connected to the other end of capacitor C10, the other end of capacitor C11, the other end of resistor R11 and the ground terminal.

[0063] Furthermore, the address switching circuit includes a DIP switch SW2. Terminals 4, 5, and 6 of the DIP switch SW2 are all connected to a 5V terminal. Terminal 1 of the DIP switch SW2 is connected to terminal 13 of the chip U3 via the ADD1 terminal. Terminal 2 of the DIP switch SW2 is connected to terminal 12 of the chip U3 via the ADD2 terminal. Terminal 3 of the DIP switch SW2 is connected to terminal 11 of the chip U3 via the ADD3 terminal.

[0064] Terminal 1 of the DIP switch SW2 is also connected to one end of resistor R19, terminal 2 of the DIP switch SW2 is also connected to one end of resistor R18, terminal 3 of the DIP switch SW2 is also connected to one end of resistor R17, and the other end of resistor R19 is connected to the other ends of resistor R18 and resistor R17 respectively and then grounded.

[0065] like Figure 7 As shown, the DC PLC constant current decoder driver includes a 12V power supply circuit, an MCU power supply circuit, an MCU, an address DIP switch circuit, a communication interface circuit, and a DC-to-AC drive circuit.

[0066] The MCU is connected to the MCU power supply circuit, the address dialing circuit, the communication interface circuit, and the DC-to-AC drive circuit. The MCU power supply circuit is also connected to the 12V power supply circuit, the 12V power supply circuit is also connected to the 0-10V adjustment circuit, and the communication interface circuit is connected to the 0-10V adjustment circuit.

[0067] Furthermore, the DC-to-AC drive circuit includes chip U6 and chip U7. Terminal 1 of chip U6 is connected to the 15V input terminal, one end of capacitor C10, and the positive terminal of diode D4. The other end of capacitor C10 is connected to terminal 4 of chip U6 and then grounded. The negative terminal of diode D4 is connected to terminal 8 of chip U6 and one end of capacitor CE3. The other end of capacitor CE3 is connected to terminal 6 of chip U6, terminal 3 of transistor Q3, the source terminal of transistor Q2, the drain terminal of transistor Q7, the A- terminal of LED, and one diode group. The transistor Q3 is connected to the following terminals: terminal 1 of the transistor Q3 is connected to terminal 7 of the chip U6 and one end of the resistor R15; the other end of the resistor R15 is connected to terminal 2 of the transistor Q3 and the gate terminal of the transistor Q2; the drain terminal of the transistor Q2 is connected to the VIN terminal; terminal 5 of the chip U6 is connected to one end of the resistor R20 and terminal 1 of the transistor Q8; the other end of the resistor R20 is connected to terminal 2 of the transistor Q8 and the gate terminal of the transistor Q7; and terminal 3 of the transistor Q8 is connected to the CS terminal and the source terminal of the transistor Q7.

[0068] Terminal 1 of chip U7 is connected to the 15V input terminal, one end of capacitor C12, and the positive terminal of diode D5. The other end of capacitor C12 is connected to terminal 4 of chip U7 and then grounded. The negative terminal of diode D5 is connected to terminal 8 of chip U7 and one end of capacitor CE4. The other end of capacitor CE4 is connected to terminal 6 of chip U7, terminal 3 of transistor Q10, the source terminal of transistor Q9, the drain terminal of transistor Q11, the LEDB- terminal, and the other end of the diode group. Terminal 1 of transistor Q10 is connected to terminal 7 of chip U7 and one end of resistor R15. The other end of resistor R15 is connected to terminal 2 of transistor Q10 and terminal G of transistor Q9. Terminal D of transistor Q9 is connected to terminal VIN. Terminal 5 of chip U7 is connected to one end of resistor R20 and terminal 1 of transistor Q12. The other end of resistor R20 is connected to terminal 2 of transistor Q12 and terminal G of transistor Q11. Terminal 3 of transistor Q12 is connected to terminal CS, one end of resistor R30, one end of resistor R31, and terminal S of transistor Q11. The other end of resistor R30 is connected to the other end of resistor R31 and then grounded.

[0069] The diode group includes two parallel diode series groups. Each diode series group includes 6 diodes, with the cathode of the left diode connected to the drain terminal of transistor Q7 and the anode of the right diode connected to the drain terminal of transistor Q7; or the anode of the left diode connected to the drain terminal of transistor Q7 and the cathode of the right diode connected to the drain terminal of transistor Q7.

[0070] Furthermore, the HIN terminal is connected to terminal 3 of transistor Q1, terminal 2 of transistor Q1 is grounded, and terminal 1 of transistor Q1 is connected to one end of resistor R14.

[0071] The LIN terminal is connected to terminal 3 of transistor Q5, terminal 2 of transistor Q5 is grounded, and terminal 1 of transistor Q55 is connected to one end of resistor R18.

[0072] The other end of resistor R14 is connected to the other end of resistor R18, terminal 3 of transistor Q4, and one end of resistor R19. Terminal 2 of transistor Q4 is connected to one end of resistor R16 and the 3V3 terminal. Terminal 1 of transistor Q4 is connected to one end of resistor R17. The other end of resistor R17 is connected to the SP terminal and the other end of resistor R16 and terminal 3 of transistor Q6. The other end of resistor R19 is connected to one end of resistor R21, one end of capacitor C11, one end of resistor R23, terminal 1 of transistor Q6, and the unlock terminal. The other end of resistor R23 is connected to the other end of capacitor C11 and terminal 2 of transistor Q6, and then grounded.

[0073] The LIN terminal is connected to the D terminal of transistor Q13 and one end of resistor R25. The other end of resistor R25 is connected to the 5V voltage terminal. The G terminal of transistor Q13 is connected to one end of resistor R27. The other end of resistor R27 is connected to the UART_TX terminal and one end of resistor R29. The other end of resistor R27 is connected to the HIN terminal. The S terminal of transistor Q13 is grounded.

[0074] Furthermore, the MCU is chip U3, the unlock terminal of the DC-to-AC drive circuit is connected to terminal 11 of chip U3, the UART_TX terminal of the DC-to-AC drive circuit is connected to terminal 2 of chip U3, and the SP terminal of the DC-to-AC drive circuit is connected to terminal 14 of chip U3.

[0075] Furthermore, the MCU power supply circuit includes a chip U2. Terminal 3 of the chip U2 is connected to one end of resistor R7 and one end of capacitor C2. The other end of resistor R7 is connected to a voltage of 12V. The other end of capacitor C2 is connected to terminal 2 of the chip U2 and one end of capacitor C3 and then grounded. The other end of capacitor C3 is connected to terminal 1 of the chip U2 and a voltage of 5V.

[0076] Terminal 3 of chip U2 is connected to terminal 1 of chip U5, terminal 2 of chip U2 is connected to terminal 1 of chip U5, and terminal 20 of chip U2 is connected to terminals 2 and 3 of chip U5.

[0077] Furthermore, the 12V power supply circuit includes a VIN terminal, which is connected to 48V, one end of capacitor C33, one end of capacitor C34, one end of capacitor C35, and the positive terminal of diode D1. The negative terminal of diode D1 is connected to one end of resistor R6. The other end of resistor R6 is connected to one end of capacitor CE1 and one end of inductor L2. The other end of inductor L2 is connected to one end of resistor R1, one end of capacitor CE1, and terminal 2 of chip U1. The other end of resistor R1 is connected to one end of capacitor C1 and the VDD terminal of chip U1. The other end of capacitor C33 is connected to the other ends of capacitor C34, capacitor C35, capacitor CE1, and capacitor CE2, and then grounded.

[0078] The other end of capacitor C1 is grounded. The CS terminal of chip U1 is connected to one end of resistor R2. The other end of resistor R2 is connected to terminal 4 of chip U1, the cathode of diode D2, and one end of inductor L3. The anode of diode D2 is grounded. The other end of inductor L3 is connected to one end of resistor R3, one end of inductor C4, one end of inductor C5, one end of resistor R5, and the 12V terminal.

[0079] The other end of resistor R3 is connected to one end of resistor R4 and VFB terminal respectively, and the other end of resistor R4 is grounded;

[0080] The other end of the inductor C4 is connected to the other end of the inductor C4 and the other end of the resistor R5, and then grounded.

[0081] Furthermore, the address dialing circuit includes a dialer SW1. Terminals 4, 5, and 6 of the dialer SW1 are all connected to a 5V terminal. Terminal 1 of the dialer SW1 is connected to terminal 17 of the chip U3 via the ADD1 terminal. Terminal 2 of the dialer SW1 is connected to terminal 16 of the chip U3 via the ADD2 terminal. Terminal 31 of the dialer SW1 is connected to terminal 15 of the chip U3 via the ADD3 terminal. Terminal 1 of the dialer SW1 is connected to one end of resistor R11. Terminal 2 of the dialer SW1 is connected to one end of resistor R12. Terminal 3 of the dialer SW1 is connected to one end of resistor R13. The other end of resistor R11 is connected to the other ends of resistors R12 and R13 respectively and then grounded.

[0082] Furthermore, the communication interface circuit includes a chip 5. Terminal 8 of the chip 5 is connected to one end of resistor R9 and a 5V voltage terminal, terminal 7 of the chip 5 is connected to the other end of resistor R9 and terminal 1 of interface J1, terminal 6 of the chip 5 is connected to one end of resistor R10 and terminal 2 of interface J1, and terminal 5 of the chip 5 is connected to the other end of resistor R10 and then grounded.

[0083] like Figure 8 As shown, when the LIN / LIN pin of chip U6 or U7 receives an input signal, the internal circuitry of the chip generates a corresponding output signal based on the input signal. When the input signal causes the chip's HO pin to output a high level and the LO pin to output a low level, the high-level signal drives the corresponding MOSFET to conduct (such as Q2 or Q9) through a resistor and transistor, while the low-level signal turns off another MOSFET (such as Q7 or Q11). In this way, current can flow to the load through the conducting MOSFET, achieving load control. By controlling the chip's input signal, functions such as switching and dimming of the load can be achieved.

[0084] like Figure 9 As shown, when an input signal is present in the circuit, the signal first acts on the base of transistor Q5, controlling the base current of Q1, which in turn affects the current between the collector and emitter of Q1. The emitter current of Q1 is transmitted to the base of Q4 through resistor R11. After being amplified or level-shifted by Q4, it is then transmitted to the base of Q3 through resistor R16, and finally the processed signal is output at the emitter of Q3. Capacitor C11 may perform filtering or other processing on the output signal to obtain a more stable and pure signal.

[0085] like Figure 10 As shown, when a high-level signal is input to the UART_TX terminal, current flows through resistor R27 to the gate of the MOSFET, causing the gate voltage to rise. When the gate voltage reaches the MOSFET's turn-on voltage (threshold voltage), the MOSFET turns on. At this time, the 5V power supply forms a loop through resistor R25, the turned-on MOSFET, and ground, and the LIN terminal outputs a low level.

[0086] When a low-level signal is input to the UART_TX terminal, the gate voltage of the MOSFET is insufficient to turn it on, and the MOSFET is in the off state. The 5V power supply outputs a high level at the LIN terminal through resistor R25.

[0087] like Figure 13As shown, the input power supply VIN+ passes through the input filter circuit (capacitors C1, C2, C3, C4 and diode D1) to obtain a relatively clean DC voltage. This voltage is then further filtered by an LC filter circuit composed of inductor L2 and capacitor C5 before being input to the power conversion chip U1. Chip U1 converts the input voltage to a 12V output based on the internal circuitry and the settings of the external feedback resistors (R1, R2). The output 12V voltage is then filtered by the output filter circuit composed of inductor L3 and capacitors C6 and C7, providing a stable 12V power supply to the load.

[0088] like Figure 14 As shown, by operating switch SW1, the voltage levels of nodes ADD1, ADD2, and ADD3 can be changed, thereby controlling the subsequent circuit or outputting signals. The presence of pull-down resistors ensures that the nodes remain stably in a low-level state when the switch is not connected to a high level (5V), avoiding uncertain voltage levels and improving the reliability and stability of the circuit.

[0089] like Figure 9 As shown, in RS-485 communication, multiple devices communicate via the RS-485 bus. When a device in this circuit needs to receive data, an external control signal sets DIRECTION low, and chip U5 enters receive mode. The differential signal on the RS-485 bus is input to the chip through pins A and B. The chip converts it into a single-ended signal and outputs it from pin RO for subsequent circuit processing. When a device needs to send data, an external control signal sets DIRECTION high, and chip U5 enters transmit mode. The data to be sent is input from pin DI, and the chip converts it into a differential signal and sends it to the RS-485 bus through pins A and B, enabling data communication with other devices.

[0090] like Figure 16 As shown, the circuit principle is that the 12V power supply is grounded through capacitor C21. The capacitor plays a filtering role here, which can stabilize the power supply voltage, reduce the impact of voltage fluctuations on the circuit, and provide the circuit with a relatively clean DC power supply.

[0091] The brightness signal input terminal is used to receive external brightness signals, which are 10V_1. The input signal first passes through a voltage divider circuit composed of resistors R31 and R38 to perform preliminary voltage division processing to adapt to the operating range and requirements of subsequent circuits;

[0092] Diodes D9 and D10 are connected in reverse parallel across the input terminals to provide amplitude limiting protection. When the input signal voltage is too high, the diodes conduct, clamping the excessive voltage within a certain range to prevent damage to subsequent circuit components.

[0093] Operational amplifier U4 is the core component of this circuit. Its pin 2 (inverting input) is connected to the node after the input signal is divided through resistor R46, and its pin 3 (non-inverting input) is grounded through resistor R51. At the same time, pin 2 and pin 6 (output) form a feedback network through resistors R52 and R53.

[0094] This connection method constitutes an inverting amplifier circuit. Based on the virtual short and virtual open characteristics of the operational amplifier, after the input signal is divided by resistors R31 and R38, a voltage difference is formed between the inverting and non-inverting input terminals of the operational amplifier. This voltage difference is amplified by the operational amplifier and output from the output terminal.

[0095] Capacitors C and C2 are used for high-frequency filtering to reduce the interference of high-frequency noise on the circuit, making the output signal more stable and pure.

[0096] After the external brightness signal is input into the circuit, it first passes through the limiting protection of the diode and the voltage division of the resistor, and then enters the operational amplifier for amplification and filtering. Finally, the processed signal is output from the output terminal of the operational amplifier. This output signal can be used in subsequent circuits or systems.

Claims

1. A dimming system based on a DC PLC constant current decoder driver, characterized in that, The dimming system includes an RS485, a signal loader, a DC PLC constant current decoder driver, and a lighting load. The RS485 is connected to the signal loader, and the signal loader is connected in parallel with multiple DC PLC constant current decoders drivers. Address DIP switches are added to the DC PLC constant current decoders drivers, and each DC PLC constant current decoder driver is connected to a lighting load.

2. The dimming system based on a DC PLC constant current decoder driver according to claim 1, characterized in that, The DC PLC constant current decoder driver includes an LED constant current drive circuit, an MCU power supply circuit, an asynchronous serial digital signal detection circuit, an address DIP switch circuit, and an MCU unit. The MCU unit is connected to the MCU power supply circuit, the address dialing circuit, the LED constant current drive circuit and the asynchronous serial digital signal detection circuit, respectively. The DC PLC constant current decoder driver is connected to the constant current loader and multiple lamps or multiple lamp groups or multiple lamp strips, respectively.

3. The dimming system based on a DC PLC constant current decoder driver according to claim 2, characterized in that, The LED constant current driving circuit includes a VIN+ terminal and a VIN- terminal connected to an asynchronous serial digital signal detection circuit. The VIN- terminal is connected to the positive terminal of diode D200 and the negative terminal of diode D400, respectively. The VIN+ terminal is connected to the positive terminal of diode D100 and the negative terminal of diode D300, respectively. The negative terminal of diode D200 is connected to the negative terminal of diode D100 and one end of inductor L1, respectively. The other end of inductor L1 is connected to the + terminal of inductor CE1, the LED + terminal, one end of inductor L2, the + terminal of inductor CE2, and one end of inductor L4, respectively. The other end of inductor L4 is connected to the LED + terminal. The negative terminals of diode D400 and diode D300 are respectively connected to one end of inductor CE1, one end of capacitor C1, one end of resistor R2, one end of capacitor C2, terminals 1-3 of switch SW1, one end of resistor RS2, one end of capacitor C3, one end of capacitor C5, terminal 8 of chip U1, and terminal 7 of chip U1. The other end of capacitor C1 is connected to one end of resistor R1, one end of resistor R3, and terminal 3 of chip U1; the other end of resistor R1 is connected to 5V; the other end of resistor R3 is connected to terminal 1 of chip U1; the other end of resistor R2 is connected to the other end of capacitor C2, the DIM terminal, and terminal 2 of chip U1; the other end of resistor RS2 is connected to one end of resistor RS3, one end of resistor RS4, one end of resistor RS5, and terminal 4 of chip U1; the other ends of resistor RS3, resistor RS4, and... The other end of resistor RS5 is connected to terminals 6-4 of switch SW1. Terminal 6 of chip U1 is connected to terminal 5 of chip U1, the other end of capacitor C3, the positive terminal of diode D2, one end of resistor R4, and one end of inductor L3. The other end of resistor R4 is connected to one end of capacitor C4. The other end of capacitor C4 is connected to the other end of inductor L2 and the negative terminal of diode D2. The other end of inductor L1 is connected to the negative terminal of inductor CE2, the other end of capacitor C5, the positive terminal of Zener diode ZD1, and one end of capacitor C6.

4. The dimming system based on a DC PLC constant current decoder driver according to claim 3, characterized in that, The positive terminal of the Zener diode ZD1 is connected to the other end of capacitor C6, one end of resistor R5, terminal 1, terminal 2, terminal 5 of chip U2, one end of resistor R6, terminal 1 and terminal 3 of chip O1. The other end of resistor R5 is connected to the LED+ terminal. The other end of resistor R6 is connected to terminal 7, terminal 8 and C- of chip O1. Terminal 4 of chip U2 is connected to terminal 2 of chip O1. Terminal 5 of chip O1 is connected to terminal 6 and W- of chip O1. Terminal 4 of chip O1 is connected to terminal 3 of chip U2. Terminal 6 of chip U2 is connected to one end of resistor R7 and CCT terminal. Terminal 7 of chip U2 is connected to one end of resistor R9 and one end of capacitor C7. Terminal 8 of chip U2 is connected to the other end of resistor R7 and the ground terminal. The other end of the resistor R9 is connected to terminal 3 of the transistor Q2. Terminal 1 of the transistor Q2 is connected to the negative terminal of the Zener diode ZD2 and one end of the resistor R8. The other end of the resistor R8 is connected to terminal 2 of the transistor Q2 and LED+. The positive terminal of the Zener diode ZD2 is grounded, and the other end of the capacitor C7 is grounded.

5. A dimming system based on a DC PLC constant current decoder driver according to claim 2, characterized in that, The VIN+ terminal of the asynchronous serial digital signal detection circuit is connected to the positive terminal of diode D5, the negative terminal of diode D5 is connected to one end of resistor R12, the other end of resistor R12 is connected to the negative terminal of Zener diode ZD3, and the positive terminal of Zener diode ZD3 is connected to terminal 1 of PC1. The VIN- terminal of the asynchronous serial digital signal detection circuit is connected to terminal 3 of PC1 and then grounded. Terminal 6 of PC1 is connected to the 5V terminal, one end of capacitor C12, one end of resistor R13, and one end of resistor R15. Terminal 6 of PC1 is connected to the other end of resistor R15, one end of capacitor C13, one end of resistor R16, and one end of resistor R14. The other end of resistor R14 is connected to the base (B) terminal of transistor Q3. The other end of resistor R15 is connected to the collector (C) terminal of transistor Q3 and terminal 3 of chip U4. The emitter (E) terminal of transistor Q3 is connected to the other ends of capacitor C12, capacitor C13, and resistor R16, and then grounded.

6. A dimming system based on a DC PLC constant current decoder driver according to claim 2, characterized in that, The MCU is chip U4. Terminal 1 of chip U4 is connected to resistor R21 and then to the CCT terminal. Terminal 7 of chip U4 is grounded. Terminal 9 of chip U4 is connected to the 5V terminal and one end of capacitor C15. The other end of capacitor C15 is grounded. Terminal 17 of chip U4 is connected to resistor R22 and then to the DIM terminal. Terminal 18 of chip U4 is connected to terminal 2 of interface J1. Terminal 4 of chip U4 is connected to terminal 4 of interface J1, one end of resistor R20, and one end of capacitor C14. Terminal 8 of chip U4 is connected to terminal 5 of interface J1. The other end of the resistor R20 is connected to the 5V terminal, and the other end of the capacitor C14 is grounded.

7. A dimming system based on a DC PLC constant current decoder driver according to claim 2, characterized in that, The MCU power supply circuit includes chip U3. Terminal 4 of chip U3 is connected to one end of capacitor C8 and the LED+ terminal, respectively. The other end of capacitor C8 is grounded. Terminal 5 of chip U3 is connected to one end of resistor R10. The other end of resistor R10 is connected to one end of capacitor C9, the cathode of diode D3, one end of inductor L5, terminal 2 of chip U3, and terminal 1 of chip U3. The other end of capacitor C9 is connected to terminal 3 of chip U3 and the negative terminal of diode D4. The other end of inductor L5 is connected to the positive terminal of diode D4, one end of capacitor C10, one end of capacitor C11, one end of resistor R11 and the 5V terminal. The positive terminal of diode D3 is connected to the other end of capacitor C10, the other end of capacitor C11, the other end of resistor R11 and the ground terminal.

8. A dimming system based on a DC PLC constant current decoder driver according to claim 2, characterized in that, The address dialing circuit includes a dialer SW2. Terminals 4, 5, and 6 of the dialer SW2 are all connected to a 5V terminal. Terminal 1 of the dialer SW2 is connected to terminal 13 of the chip U3 via the ADD1 terminal. Terminal 2 of the dialer SW2 is connected to terminal 12 of the chip U3 via the ADD2 terminal. Terminal 3 of the dialer SW2 is connected to terminal 11 of the chip U3 via the ADD3 terminal. Terminal 1 of the DIP switch SW2 is also connected to one end of resistor R19, terminal 2 of the DIP switch SW2 is also connected to one end of resistor R18, terminal 3 of the DIP switch SW2 is also connected to one end of resistor R17, and the other end of resistor R19 is connected to the other ends of resistor R18 and resistor R17 respectively and then grounded.

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