On-load expansion lamp networking circuit and electronic equipment

Abstract

The utility model relates to the technical field of lamp control, in particular to a lamp networking circuit with on-load expansion and electronic equipment. The circuit comprises a mode switching module, an IC control module, a signal amplification module, an on-load expansion module and a power supply driving module, the input end of the mode switching module is connected with the first end of the signal input terminal, and the first end of the signal input terminal is further connected with the input end of the IC control module. The output end of the mode switching module is connected with the joint of the signal input terminal and the IC control module, and the output end of the IC control module is connected with the input end of the signal amplification module; the output end of the signal amplification module is connected with the input end of the on-load expansion module, and the first output end of the on-load expansion module is connected with the input end of the power supply driving module; and the second output end of the on-load expansion module is connected with an external signal output terminal. According to the invention, the load capacity of each dimmer is improved and output, so that the limitation of the number of the lamps which can be driven at the same time is broken through, and the convenience of the intelligent dimmer is improved.

Description

Technical Field

[0001] The present application relates to the technical field of lamp control, and in particular to a lamp networking circuit and electronic equipment with load expansion. Background Art

[0002] In networked lighting control, multiple lamps can be controlled through signal transmission via intelligent dimmer modules. Conventional technology allows one dimmer module to control and drive one lamp, while another dimmer module controls and drives another. Furthermore, a dedicated driver circuit can be incorporated into the first dimmer module, enabling it to control and drive not only the next dimmer module but also a lamp directly. This signal transmission method allows a single control signal to be transmitted to two lamps, theoretically allowing for unlimited expansion of dimmer modules to drive more lamps.

[0003] However, this design has load capacity limitations. Due to the limited load capacity of the PWM signal output, it can currently only drive two lamps. Therefore, even if more dimmer modules are added, the number of lamps driven cannot be effectively increased, which greatly limits the system's scalability and practical application value.

[0004] Based on this, how to expand the load capacity of signal output to drive more lamps simultaneously is a technical problem that needs to be solved urgently. Utility Model Content

[0005] In order to overcome the shortcomings of the existing technology, the present application provides a load-extended lamp networking circuit and electronic equipment. By improving the output signal load capacity of each dimmer part, it breaks through the limitation of the load capacity on the number of lamps that can be driven simultaneously in the control of multiple lamps, thereby improving the convenience of the smart dimmer.

[0006] The technical solution adopted by this application to solve its technical problems is:

[0007] In a first aspect, the present application provides a lamp networking circuit with load expansion, the circuit comprising: a mode switching module, an IC control module, a signal amplification module, a load expansion module and a power driver module;

[0008] The input end of the mode switching module is connected to the first end of the external signal input terminal, and the first end of the signal input terminal is also connected to the input end of the IC control module;

[0009] The output end of the mode switching module is connected to the connection between the signal input terminal and the IC control module, and the output end of the IC control module is connected to the input end of the signal amplification module, so as to input the first PWM signal to the signal amplification module through the IC control module;

[0010] The output end of the signal amplification module is connected to the input end of the load expansion module, and the first output end of the load expansion module is connected to the input end of the power drive module, so as to output the second PWM signal obtained after the PWM signal amplified by the signal amplification module is processed by the load expansion module to the power drive module.

[0011] The second output end of the load expansion module is connected to the external signal output terminal.

[0012] Optionally, the load expansion module comprises an integrated follower.

[0013] The first input end of the integrated follower is connected to the output end of the signal amplification module, and the first output end of the integrated follower is connected to the input end of the power drive module.

[0014] The second input end of the integrated follower is connected to the output end of the signal amplification module, and the second output end of the integrated follower is connected to the input end of the output signal terminal.

[0015] Optionally, the integrated follower adopts the model SGM8418-2.

[0016] The 2-pin of the integrated follower is connected to the 1-pin of the integrated follower, and the 1-pin of the integrated follower is connected to the input end of the output signal terminal, so as to constitute the second output end of the integrated follower.

[0017] The 3-pin and 5-pin of the integrated follower are connected to the output end of the signal amplification module.

[0018] The 6-pin of the integrated follower is connected to the 7-pin of the integrated follower, and the 7-pin of the integrated follower is connected to the input end of the power drive module.

[0019] The 8-pin of the integrated follower is connected to the external DC signal source, and the 4-pin of the integrated follower is grounded.

[0020] Optionally, the signal amplification module comprises a first amplification unit; the first amplification unit comprises a first MOS tube, a first resistor, a second resistor, a voltage stabilizing tube and a first capacitor.

[0021] The gate of the first MOS tube is connected to the output end of the IC control module, the source of the first MOS tube is grounded, and the drain of the first MOS tube is connected to the first input end of the integrated follower and one end of the first resistor.

[0022] The other end of the first resistor is connected to one end of the second resistor, and the other end of the second resistor is connected to the DC output end of the power drive module.

[0023] The negative electrode of the voltage stabilizing tube is connected to the connection between the first resistor and the second resistor, and the positive electrode of the voltage stabilizing tube is grounded.

[0024] One end of the first capacitor is connected to the connection between the second resistor and the power supply driving module, and the other end of the first capacitor is grounded.

[0025] Optionally, the signal amplification module further comprises a second amplification unit; the second amplification unit comprises a second MOS tube, a third resistor, a fourth resistor and a second capacitor;

[0026] The gate of the second MOS tube is connected to the output end of the IC control module, one end of the second capacitor and one end of the third resistor, and the other end of the second capacitor and the other end of the third resistor are grounded.

[0027] The source of the second MOS tube is grounded, the drain of the second MOS tube is connected to one end of the fourth resistor and the second input end of the integrated follower, and the other end of the fourth resistor is connected to the connection between the first resistor and the second resistor.

[0028] Optionally, the IC control module comprises a signal processing chip and a fifth resistor;

[0029] The input end of the signal processing chip is connected to the connection between the input end of the signal input terminal and the output end of the mode switching module;

[0030] The output end of the signal processing chip is connected to one end of the fifth resistor, and the other end of the fifth resistor is connected to the gate of the first MOS tube and the gate of the second MOS tube.

[0031] Optionally, the mode switching module comprises a variable resistor and a control switch;

[0032] One end of the control switch is connected to the input end of the input signal terminal, and the other end is connected to the adjustment end of the variable resistor;

[0033] The output end of the variable resistor and the ground end of the input signal terminal are connected to the ground electrode;

[0034] The connection between the input signal terminal and the control switch is connected to the input end of the signal processing chip.

[0035] Optionally, the first amplification unit further comprises a diode;

[0036] The negative electrode of the diode is connected to the connection between the second resistor and the first capacitor, and the positive electrode of the diode is connected to the DC output end of the power supply driving module.

[0037] Optionally, the model of the signal processing chip is RX-8025T.

[0038] In a second aspect, the application provides an electronic device loaded with the lamp networking circuit with load expansion.

[0039] The application has the following beneficial effects: in the application, the circuit design including the mode switching module, the IC control module, the signal amplification module, the load expansion module and the power supply driving module is adopted, the effect that from the single load capacity driving only two lamps to driving more lamps through improving the output load capacity and with the help of the follower technology is realized. Specifically, the mode switching module receives an external input signal, and then transmits the signal to the IC control module, the IC control module generates a first PWM signal, the signal is amplified by the signal amplification module to obtain a second PWM signal, the signal amplification module transmits the signal to the load expansion module, the signal is processed by the integrated two followers to enhance the load capacity, part of the PWM signal is used to drive the current lamp, and the other part is transmitted to the next dimmer module through the signal output terminal as the input signal of the next dimmer, so that more lamps can be driven, the problem of limited output PWM signal load capacity is solved, and the circuit load capacity is significantly improved. BRIEF DESCRIPTION OF DRAWINGS

[0040] Figure 1 The module connection diagram of the lamp networking circuit with load expansion provided by the embodiment of the application is provided.

[0041] Figure 2 The circuit principle diagram of the lamp networking circuit with load expansion provided by the embodiment of the application is provided.

[0042] Figure 3 The internal structure diagram of the integrated follower used in the lamp networking circuit with load expansion provided by the embodiment of the application is provided. DETAILED DESCRIPTION

[0043] The application will be further described below in combination with the drawings and embodiments.

[0044] The concept, specific structure and generated technical effects of the present application will be described clearly and completely in combination with the embodiments and drawings, so as to fully understand the purpose, features and effects of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments, and other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative labor are within the scope of protection of the present application. In addition, all the coupling / connection relationships involved in the patent do not mean that the components are directly connected, but that a better coupling structure can be composed by adding or reducing coupling accessories according to the specific implementation. The technical features in the creation of the present application can be combined interactively without conflict.

[0045] Reference Figure 1 , Figure 1 The module connection diagram of the lamp networking circuit with load expansion provided by the embodiments of the present application is combined with Figure 1 It can be seen that the lamp networking circuit with load expansion provided by the present application includes a mode switching module, an IC control module, a signal amplification module, a load expansion module and a power supply driving module, and their connection relationship is as follows:

[0046] The input end of the mode switching module is connected with the first end of the external signal input terminal, and the first end of the signal input terminal is also connected with the input end of the IC control module.

[0047] Regarding the signal input terminal: the signal input terminal is connected with the external signal generator, which can be the output signal terminal of the connected previous product, and the dimmer is connected with the dimmer through the terminal. Taking one product as an example, the signal input terminal can be connected with the master control in addition to the signal output terminal of the previous dimmer, and the master control is a PWM signal generator or a 0-10V direct current signal.

[0048] Regarding the mode switching module: the mode switching module includes a control switch for controlling the mode, which includes two control modes in the embodiments of the present application. In the first control mode, the control switch is closed, and the resistance value is adjusted by the potentiometer in the mode switching module, which will be inducted by the subsequent IC control module, so that the adjustable signal is input to the IC control module through the resistance value; in the second control mode, the control switch is opened, and the master control connected externally controls all the dimmers in series, and the signal of the controller is directly input to the input end of the IC control module.

[0049] The output end of the mode switching module is connected with the connection place of the signal input terminal and the IC control module, and the output end of the IC control module is connected with the input end of the signal amplification module, for inputting the first PWM signal to the signal amplification module through the IC control module.

[0050] Regarding the IC control module: the IC control module includes a signal processing chip, in the embodiment of the application, the model of the signal processing chip is RX-8025T, which is a new type of real-time clock chip with I2C interface and temperature compensation function, and internally integrated 32.768KHz temperature compensation crystal oscillator. When the input signal is transmitted to the signal processing chip, it automatically identifies the input signal category, selects different adjustment modes according to the input type of the signal and converts the signal into a PWM signal. The output PWM signal is input to the input end of the signal amplification module for amplification processing.

[0051] The output end of the signal amplification module is connected to the input end of the load expansion module, and the first output end of the load expansion module is connected to the input end of the power supply driving module, for outputting the second PWM signal obtained by processing the PWM signal amplified by the signal amplification module through the load expansion module to the power supply driving module.

[0052] Regarding the signal amplification module: the signal amplification module includes a first amplification unit and a second amplification unit, wherein the first amplification unit is used to amplify the PWM signal and send it to the power supply driving module through the first output end of the load expansion module to drive the corresponding lamp to light up; the second amplification unit is used to amplify the PWM signal and send it to the output signal terminal through the second output end of the load expansion module, thereby providing the PWM signal for the next connected dimmer to realize network control.

[0053] The second output end of the load expansion module is connected to the external signal output terminal.

[0054] Regarding the load expansion module: the load expansion module is composed of at least two followers, in the embodiment of the application, an integrated follower is used, the model of which is SGM8418-2. The first input end of the integrated follower receives the amplified PWM signal and outputs it from the first output end to the input end of the power supply driving module, thereby driving the lamp; the second input end of the integrated follower receives the amplified PWM signal and outputs it from the second output end to the signal output terminal, thereby providing the PWM signal for the signal input terminal of the dimmer connected behind to control the driving of the corresponding lamp of the next dimmer.

[0055] Further, with reference to Figure 2 , Figure 2 The circuit principle diagram of the load expansion lamp network circuit provided in the embodiment of the application includes the specific circuit design of the mode switching module, the IC control module, the signal amplification module, the load expansion module and the power supply driving module, which will be described below:

[0056] The load expansion module includes an integrated follower U3;

[0057] The first input end (5-pin) of the integrated follower U3 is connected with the output end of the signal amplification module, and the first output end (7-pin) of the integrated follower U3 is connected with the input end of the power supply driving module.

[0058] The second input end (3-pin) of the integrated follower U3 is connected with the output end of the signal amplification module, and the second output end (1-pin) of the integrated follower U3 is connected with the input end of the output signal terminal.

[0059] Specifically, in the embodiment of the present application, the integrated follower adopted is SGM8418-2, and the internal structure of the integrated follower is shown in the following figure. Figure 3 , Figure 3 The internal structure of the integrated follower adopted in the lamp networking circuit with load expansion provided by the embodiment of the present application is shown in the following figure. Figure 3 As can be seen, the 1-pin of the integrated follower is connected with the 2-pin of the integrated follower, the 1-pin of the integrated follower is connected with the input end of the output signal terminal, and the 3-pin of the integrated follower is connected with the output end of the signal amplification module, so that the inverting input end and the output end of one amplifier are connected, and the 1 / 2 / 3-pin forms a first group of followers.

[0060] Similarly, the 7-pin of the integrated follower is connected with the 6-pin of the integrated follower, the 7-pin of the integrated follower is connected with the input end of the power supply driving module, and the 5-pin of the integrated follower is connected with the output end of the signal amplification module, so that the inverting input end and the output end of another amplifier are connected, and the 5 / 6 / 7-pin forms a second group of followers.

[0061] Further, the signal amplification module comprises a first amplification unit; the first amplification unit comprises a first MOS tube Q2, a first resistor R22, a second resistor R17, a voltage stabilizing tube Z1 and a first capacitor C2, and the specific connection mode is as follows:

[0062] The gate of the first MOS tube is connected with the output end of the IC control module, the source of the first MOS tube is grounded, and the drain of the first MOS tube is connected with the first input end of the integrated follower and one end of the first resistor;

[0063] The other end of the first resistor R22 is connected with one end of the second resistor R17, and the other end of the second resistor R17 is connected with the direct current output end (12V) of the power supply driving module CN1.

[0064] The negative electrode of the voltage stabilizing tube Z1 is connected with the connection position of the first resistor R22 and the second resistor R17, and the positive electrode of the voltage stabilizing tube Z1 is grounded.

[0065] One end of the first capacitor C2 is connected to the connection between the second resistor R17 and the power supply driving module CN1, and the other end of the first capacitor C2 is grounded.

[0066] Specifically, when the output end of the IC control module sends a PWM signal to the gate of the first MOS tube, when the PWM signal is high, the DC output end of the power supply driving module sends a 12V DC signal, which is filtered by the first capacitor C2, limited by the second resistor R17, stabilized by the stabilizing tube Z1, and output to the ground after being limited by the first resistor R22, so as to change the level of the DIM2 potential point. Conversely, the amplified PWM signal is output to the 5th pin of U3 through the DIM2 potential point, and then output to the DIM+ pin of the power supply driving module from the 7th pin of U3 for corresponding lamp driving.

[0067] More specifically, a diode D2 can also be added between the power supply driving module CN1 and the second resistor R17 for anti-backflow protection. Specifically, the negative electrode of the diode D2 is connected to the connection between the second resistor R17 and the first capacitor C2, and the positive electrode of the diode D2 is connected to the DC output end of the power supply driving module.

[0068] Further, the signal amplification module further comprises a second amplification unit; the second amplification unit comprises a second MOS tube Q1, a third resistor R18, a fourth resistor R21 and a second capacitor C9, and the specific connection mode is as follows:

[0069] The gate of the second MOS tube Q1 is connected to the output end of the IC control module, one end of the second capacitor C9 and one end of the third resistor R18, and the other end of the second capacitor C9 and the other end of the third resistor R18 are grounded.

[0070] The source of the second MOS tube Q1 is grounded, the drain of the second MOS tube Q1 is connected to one end of the fourth resistor R21 and the second input end of the integrated follower, and the other end of the fourth resistor R21 is connected to the connection between the first resistor R22 and the second resistor R17.

[0071] Specifically, similar to the first amplification unit described above, when the IC control module sends a PWM signal, when the PWM signal is high, the PWM signal is filtered by the second capacitor C9 and the third resistor R18, the second MOS tube Q1 is turned on, and the signal is transmitted from the DC output end of the power supply driving module CN1 to the ground through the second resistor R17 and the fourth resistor R21. At this time, the potential of DIM1 point is low, and when the PWM signal is low, the potential of DIM1 point is high. The potential of this point is collected by the 3rd pin of the integrated follower U3, and output to the output signal terminal through the 1st pin.

[0072] More specifically, since the voltage follower has the characteristics of high input impedance, low output impedance, isolation and buffering, the influence of the load on the previous stage circuit is avoided, thereby improving the load capacity. Specifically, if U3 is removed, MOS tubes Q1 / Q2 and current limiting resistors R21 / R22 work together. When the MOS drive is at a low level, MOS tubes Q1 / Q are not conductive, and the output is at a high level. The output current is 12V / R21. In this embodiment, R21 has a resistance of 2K, so the maximum output current is only 6mA. If U3 is added for load expansion, the output current can be increased to about 400mA. Based on this, the original 6mA current can drive two lamps at the same time, and the improved current can drive 50 lamps at the same time, which is significantly improved.

[0073] Further, the IC control module comprises a signal processing chip IC1 and a fifth resistor R11;

[0074] The input end of the signal processing chip is connected to the connection between the input end of the signal input terminal CN4 and the output end of the mode switching module;

[0075] The output end of the signal processing chip IC1 is connected to one end of the fifth resistor R11, and the other end of the fifth resistor R11 is connected to the gate of the first MOS tube and the gate of the second MOS tube.

[0076] Specifically, the signal processing chip IC1 is a new type of real-time clock chip with I2C interface and temperature compensation function, and the chip model is RX-8025T. The chip integrates a 32.768KHz temperature compensated crystal oscillator. When the input signal is transmitted to the chip IC1, the input signal category is automatically recognized, different adjustment modes are selected according to the input type of the signal, and the signal is converted into a PWM signal. Among them, the PWM signal or 0-10V DC signal from the signal input terminal is received from the 5th pin of IC1, and the 6th pin of IC1 is output to the gate of the first MOS tube Q2 and the gate of the second MOS tube Q1 through the fifth resistor R11.

[0077] Further, the mode switching module comprises a variable resistor and a control switch;

[0078] One end of the control switch S1 is connected to the input end of the input signal terminal CN4, and the other end is connected to the adjustment end of the variable resistor RS1;

[0079] The output end of the variable resistor RS1 and the ground end of the input signal terminal CN4 are connected to the ground.

[0080] The connection between the input signal terminal CN4 and the control switch S1 is connected to the input end of the signal processing chip IC1.

[0081] Specifically, when the networked lamp control needs to be implemented by multiple circuits provided by the present application, two modes are included. In the first mode, all subsequent dimmers are controlled by the first dimmer in series. At this time, the variable resistor RS1 is closed, and the size of the adjustable resistor of the variable resistor RS1 is identified through the 5th pin of the signal processing chip IC1. The IC1 outputs a PWM signal to the gate of the first MOS tube Q2 and the second MOS tube Q1 through the 6th pin.

[0082] The switching frequency of the first MOS tube Q2 and the second MOS tube Q1 is the same as the signal waveform of the 6th pin of the signal processing chip IC1.

[0083] In the second aspect, the present application provides an electronic device loaded with the above-mentioned networked lamp circuit with load expansion.

[0084] The above is a specific description of the preferred implementation of the present application, but the present application is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or replacements without departing from the spirit of the present application. These equivalent modifications or replacements are all included in the scope defined by the claims of the present application.

Claims

1. A lighting networking circuit with load expansion, characterized in that: The circuit includes: a mode switching module, an IC control module, a signal amplification module, a load extension module and a power drive module; The input end of the mode switching module is connected to the first end of the external signal input terminal, and the first end of the signal input terminal is also connected to the input end of the IC control module; The output end of the mode switching module is connected to the connection between the signal input terminal and the IC control module, and the output end of the IC control module is connected to the input end of the signal amplification module, so as to input the first PWM signal to the signal amplification module through the IC control module; The output end of the signal amplification module is connected to the input end of the load extension module, and the first output end of the load extension module is connected to the input end of the power driver module, so as to output the obtained second PWM signal to the power driver module after the PWM signal amplified by the signal amplification module is processed by the load extension module; The second output end of the load extension module is connected to an external signal output terminal.

2. The lamp networking circuit with load expansion according to claim 1, characterized in that: The load extension module includes an integrated follower; The first input end of the integrated follower is connected to the output end of the signal amplification module, and the first output end of the integrated follower is connected to the input end of the power driving module; The second input end of the integrated follower is connected to the output end of the signal amplification module, and the second output end of the integrated follower is connected to the input end of the signal output terminal.

3. The lamp networking circuit with load expansion according to claim 2, characterized in that: The model of the integrated follower is SGM8418-2; Pin 2 of the integrated follower is connected to pin 1 of the integrated follower, and pin 1 of the integrated follower is connected to the input end of the signal output terminal; Pins 3 and 5 of the integrated follower are connected to the output end of the signal amplification module; Pin 6 of the integrated follower is connected to pin 7 of the integrated follower, and pin 7 of the integrated follower is connected to the input end of the power drive module; Pin 8 of the integrated follower is connected to an external DC signal source, and pin 4 of the integrated follower is grounded.

4. The lamp networking circuit with load expansion according to claim 2, characterized in that: The signal amplification module includes a first amplification unit; the first amplification unit includes a first MOS tube, a first resistor, a second resistor, a voltage regulator tube and a first capacitor; The gate of the first MOS transistor is connected to the output end of the IC control module, the source of the first MOS transistor is grounded, and the drain of the first MOS transistor is connected to the first input end of the integrated follower and one end of the first resistor; The other end of the first resistor is connected to one end of the second resistor, and the other end of the second resistor is connected to the DC output end of the power driving module; The negative electrode of the voltage-stabilizing tube is connected to the connection point of the first resistor and the second resistor, and the positive electrode of the voltage-stabilizing tube is grounded; One end of the first capacitor is connected to a connection point between the second resistor and the power driving module, and the other end of the first capacitor is grounded.

5. The lamp networking circuit with load expansion according to claim 4, characterized in that: The signal amplification module further includes a second amplification unit; the second amplification unit includes a second MOS tube, a third resistor, a fourth resistor and a second capacitor; The gate of the second MOS transistor is connected to the output end of the IC control module, one end of the second capacitor and one end of the third resistor, and the other end of the second capacitor and the other end of the third resistor are grounded; The source of the second MOS transistor is grounded, the drain of the second MOS transistor is connected to one end of the fourth resistor and the second input end of the integrated follower, and the other end of the fourth resistor is connected to the connection point between the first resistor and the second resistor.

6. The lamp networking circuit with load expansion according to claim 5, characterized in that: The IC control module includes a signal processing chip and a fifth resistor; The input end of the signal processing chip is connected to the connection between the input end of the signal input terminal and the output end of the mode switching module; The output end of the signal processing chip is connected to one end of the fifth resistor, and the other end of the fifth resistor is connected to the gate of the first MOS transistor and the gate of the second MOS transistor.

7. The lamp networking circuit with load extension according to claim 6, characterized in that: The mode switching module includes a variable resistor and a control switch; One end of the control switch is connected to the input end of the signal input terminal, and the other end is connected to the adjustment end of the variable resistor; The output end of the variable resistor and the ground end of the signal input terminal are connected to the ground; The connection between the signal input terminal and the control switch is connected to the input end of the signal processing chip.

8. The lamp networking circuit with load extension according to claim 4, characterized in that: The first amplifying unit further includes a diode; The cathode of the diode is connected to the connection point of the second resistor and the first capacitor, and the anode of the diode is connected to the DC output end of the power driving module.

9. The lamp networking circuit with load expansion according to claim 6, characterized in that: The model of the signal processing chip is RX-8025T.

10. An electronic device, characterized in that: A lighting networking circuit equipped with a load extension as claimed in any one of claims 1 to 9.

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