Dimmable power supply compatible with multiple dimming modes

Abstract

The application relates to the technical field of dimming power supplies, and discloses a dimming power supply compatible with multiple dimming modes, which comprises an MCU control circuit, a dimming power supply main circuit, a DALI dimming circuit, a DMX dimming circuit, a 0-10V dimming circuit and a public interface network circuit. The public interface network circuit comprises a D+ input pin, a D- input pin, a GND pin, a D+ access voltage detection circuit, a D- access signal detection circuit and a D- access voltage detection circuit. The public interface network circuit can detect the access conditions of the three pins and the signal characteristics of the access, and feed back the detection results to the MCU control circuit, so that the MCU control circuit can judge the type of the accessed dimming signal according to the feedback results, and adjust the connection conditions of the three pins and the dimming circuit by controlling controllable switching devices in the public interface network circuit. The dimming signal can be input into the corresponding dimming circuit, and adaptive switching of the dimming mode is realized. The dimming power supply can avoid wiring errors leading to failure to dim or damage to the power supply.

Description

Technical Field

[0001] This invention relates to the field of dimming power supply technology, and specifically to a dimming power supply compatible with multiple dimming methods. Background Technology

[0002] With the continuous development of the LED power supply lighting industry, LED dimming drivers are now installed in almost every household and for outdoor lighting. This has led to the rapid growth of the LED power supply market, and customers are demanding increasingly higher performance from LED power supplies. Currently, in practical applications, the requirements for dimming methods are also becoming more stringent. Most dimming power supplies only support a single dimming method. While some can support multiple dimming signals, they either require module switching or the use of multiple dimming lines to differentiate them. Users often damage the power supply or become unable to dim due to forgetting to switch modules or connecting signal cables incorrectly. Therefore, a new type of dimming power supply needs to be designed to solve these technical problems. Summary of the Invention

[0003] To overcome the shortcomings of the prior art, the present invention aims to provide a dimming power supply that is compatible with multiple dimming modes. It can be compatible with three dimming modes, namely DALI, 0-10V and DMX, through only one set of pin connectors. It can automatically determine the dimming mode used according to the wiring and send the dimming signal to the corresponding dimming circuit. Users can switch dimming modes without replacing the signal line group or module, and incorrect signal line connection will not cause damage to the dimming power supply.

[0004] To solve the above problems, the technical solution adopted by the present invention is as follows: a dimming power supply compatible with multiple dimming methods, comprising: an MCU control circuit; a dimming power supply main circuit, with its input terminal connected to AC mains power and its output terminal connected to a lamp load, used to convert AC mains power into power that can drive the lamp load to emit the lighting effect required by the user under the control of the MCU control circuit; a DALI dimming circuit, with its output terminal connected to the MCU control circuit, used to process DALI dimming signals; and a DMX dimming circuit, with its output terminal connected to the MCU control circuit, used to process DMX dimming signals; 0-10V The dimming circuit, with its output connected to the MCU control circuit, is used to process 0-10V dimming signals. The common interface network circuit includes a D+ input pin, a D- input pin, a GND pin, a D+ access voltage detection circuit, a D- access signal detection circuit, and a D- access voltage detection circuit. The D+ input pin is connected to the first input pin of the DALI dimming circuit via a first controllable switch. The D+ input pin is also connected to the DATA+ pin of the DMX dimming circuit via a second controllable switch. The D- input pin is connected to the DATA- pin of the DMX dimming circuit. The D-input pin is also connected to the positive input pin of the 0-10V dimming circuit via a third controllable switch. The GND pin is connected to the second input pin of the DALI dimming circuit, the ground pin of the DMX dimming circuit, and the negative input pin of the 0-10V dimming circuit. The D+ input voltage detection circuit is used to detect whether the voltage connected to the D+ input pin conforms to the DALI signal voltage and feeds back the detection result to the MCU control circuit. The D- input signal detection circuit is used to detect whether the D-input pin is connected to a high or low level and feeds back the detection result. Feedback is provided to the MCU control circuit; the D- input voltage detection circuit is used to detect whether the D- input pin is connected to a 10V voltage, and feeds back the detection result to the MCU control circuit. The MCU control circuit determines the signal type connected to the common interface network circuit based on the feedback results of the D+ input voltage detection circuit, the D- input signal detection circuit, and the D- input voltage detection circuit, and controls the first controllable switch, the second controllable switch, or the third controllable switch to be turned on according to the signal type, so as to input the input dimming signal to the corresponding dimming circuit.

[0005] The dimming power supply described above, which is compatible with multiple dimming modes, includes a D+ input voltage detection circuit comprising resistors R14 and R16 connected in series. The two ends of the series structure formed by resistors R14 and R16 are respectively connected to the D+ input pin and the GND pin. The connection node between resistors R14 and R16 is connected to the MCU control circuit.

[0006] The aforementioned dimming power supply compatible with multiple dimming modes includes a D-input signal detection circuit comprising a resistor R15, an optocoupler U4, and a resistor R17. The positive terminal of the input of the optocoupler U4 is connected to the D-input pin via resistor R15, and the negative terminal of the input of the optocoupler U4 is connected to the GND pin. The first output of the optocoupler U4 is connected to a reference voltage via resistor R17, and the second output of the optocoupler U4 is connected to signal ground. The first output of the optocoupler U4 is also connected to the MCU control circuit.

[0007] The aforementioned dimming power supply, which is compatible with multiple dimming methods, includes a D-input voltage detection circuit comprising resistors R25 and R26 connected in series. The two ends of the series structure formed by resistors R25 and R26 are respectively connected to the D-input pin and the GND pin. The connection node between resistors R25 and R26 is connected to the MCU control circuit.

[0008] In the aforementioned dimming power supply compatible with multiple dimming modes, the first controllable switching device, the second controllable switching device, and the third controllable switching device are all transistors.

[0009] In the aforementioned dimming power supply compatible with multiple dimming modes, the bases of the first controllable switching device, the second controllable switching device, and the third controllable switching device are all connected to the MCU control circuit through a first signal isolation circuit.

[0010] In the aforementioned dimming power supply compatible with multiple dimming modes, the output terminals of the D+ access voltage detection circuit and the D- access voltage detection circuit are connected to the MCU control circuit through a second isolation circuit.

[0011] The aforementioned dimming power supply compatible with multiple dimming methods also includes a low-power standby circuit. When the MCU control circuit outputs a signal corresponding to the minimum voltage through the DALI dimming circuit, the DMX dimming circuit, or the 0-10V dimming circuit, it sends a standby signal to the main circuit of the dimming power supply through the low-power standby circuit.

[0012] The aforementioned dimming power supply compatible with multiple dimming modes also includes a wireless communication setting circuit. The wireless communication setting circuit is connected to the MCU control circuit and is used to communicate wirelessly with external devices. When the wireless communication setting circuit receives a dimming mode configured by an external device via wireless communication, the MCU control circuit controls the corresponding controllable switch among the first, second, and third controllable switches to turn on according to the dimming mode type received by the wireless communication setting circuit.

[0013] The aforementioned dimming power supply, which is compatible with multiple dimming methods, has an NFC communication circuit for its wireless communication settings.

[0014] Compared to existing technologies, the advantages of this invention are as follows: The dimming power supply of this invention, compatible with multiple dimming methods, can be adapted to DALI dimming circuits, DMX dimming circuits, and 0-10V dimming circuits through a set of input pins of the common interface network circuit. This avoids confusion caused by numerous different dimming method pin groups on the power supply, preventing users from connecting cables incorrectly and resulting in power supply damage or dimming failure. The common interface network circuit detects the input voltage and signal type and feeds the detection results back to the MCU control circuit. The MCU control circuit can then determine the specific dimming signal type based on the feedback and control the corresponding controllable switching device in the common interface network circuit to conduct, allowing the dimming signal to be input to the matching dimming circuit. Even if the user wires the signal incorrectly, the incorrect wiring will not cause the voltage or signal type input to the three input pins to match any dimming method supported by the power supply. The MCU control circuit will not conduct any controllable switching device, preventing the input voltage from connecting to the dimming circuit and avoiding damage to the power supply due to abnormal input voltage caused by incorrect wiring. This dimming power supply, with fewer input pins, eliminates the need for different wiring harnesses and signal access circuits for different dimming modes, which helps reduce the power supply size and further lower manufacturing costs.

[0015] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0016] Figure 1 This is a block diagram illustrating the principle of a dimming power supply according to an embodiment of the present invention.

[0017] Figure 2 This is a schematic diagram of the DC-DC circuit according to an embodiment of the present invention.

[0018] Figure 3 This is a schematic diagram of the common interface network circuit according to an embodiment of the present invention.

[0019] Figure 4 This is a schematic diagram of the first isolation circuit according to an embodiment of the present invention.

[0020] Figure 5 This is a schematic diagram of the second isolation circuit according to an embodiment of the present invention. Detailed Implementation

[0021] The embodiments of the present invention are described in detail below, with reference to... Figure 1This invention provides a dimming power supply compatible with multiple dimming methods, including an MCU control circuit, a dimming power supply main circuit, a DALI dimming circuit, a DMX dimming circuit, a 0-10V dimming circuit, and a common interface network circuit. The MCU control circuit controls the entire dimming power supply. The dimming power supply main circuit, under the control of the MCU control circuit, converts AC mains power into a power supply capable of driving the lighting load to produce the desired lighting effect. It typically includes a rectifier bridge, a main power supply circuit, a DC-DC circuit, and a power MOSFET. The input of the rectifier bridge is connected to the AC mains, and its output is connected to the main power supply circuit. The main power supply circuit converts the AC mains power into a stable DC voltage, serving as the supply voltage or reference voltage for the internal components of the power supply. The output of the main power supply circuit is connected to the input of the DC-DC circuit. The DC-DC circuit converts the DC voltage output by the main power supply circuit into the DC voltage required by the lighting load. The power MOSFET is connected in series between the negative terminal of the DC-DC circuit output and the negative terminal of the lighting load. The MCU control circuit sends a PWM signal to the gate of the power MOSFET, adjusting the switching frequency of the MOSFET to regulate the brightness or color temperature of the LED lighting load. The DALI dimming circuit, DMX dimming circuit, and 0-10V dimming circuit are used to process the DALI dimming signal, DMX dimming signal, and 0-10V dimming signal, respectively, and convert these dimming signals into electrical signals that can be recognized by the MCU control circuit.

[0022] The common interface network circuit includes a D+ input pin, a D- input pin, a GND pin, a D+ access voltage detection circuit, a D- access signal detection circuit, and a D- access voltage detection circuit. The D+ input pin is connected to the first input pin of the DALI dimming circuit via a first controllable switch Q5, and also to the DATA+ pin of the DMX dimming circuit via a second controllable switch Q6. The D- input pin is connected to the DATA- pin of the DMX dimming circuit, and also to the positive input pin of the 0-10V dimming circuit via a third controllable switch Q7. The GND pin is connected to the second input pin of the DALI dimming circuit, the ground pin of the DMX dimming circuit, and the negative input pin of the 0-10V dimming circuit. The D+ input voltage detection circuit detects whether the voltage connected to the D+ input pin matches the DALI signal voltage and feeds the result back to the MCU control circuit. The D- input signal detection circuit detects whether the D- input pin is connected to a high or low level and feeds the result back to the MCU control circuit. The D- input voltage detection circuit detects whether the D- input pin is connected to 10V and feeds the result back to the MCU control circuit. Based on the feedback from the D+, D-, and D- input voltage detection circuits, the MCU control circuit determines the signal type connected to the common interface network circuit and controls the first controllable switch Q5, the second controllable switch Q6, or the third controllable switch Q7 to conduct, thus inputting the dimming signal to the corresponding dimming circuit. It is understood that the GND pin should be grounded.

[0023] Because DMX dimming signals transmit dimming information by sending differential square wave signals via DATA+ and DATA-, the highest voltage of the square wave signal is around 5V; DALI dimming signals, on the other hand, transmit dimming information via digital signals, and DALI dimming signals carry approximately 16V DC voltage, which can directly drive low-power devices, and will also send a high-level voltage of 9.5V-22.5V when no command is sent; 0-10V dimming signals transmit dimming information via high-level voltage values, with 10V corresponding to 100% brightness and 0V to 0% brightness, therefore, based on these three types of dimming signals... Regarding the signal characteristics, the specific usage method of the dimming power supply in this embodiment of the invention is as follows: First, the wiring methods for the three dimming modes are as follows: When using DALI dimming mode, the two signal lines of DALI dimming are connected to the D+ input pin and the GND pin respectively; when using DMX dimming mode, the DATA+ signal, DATA- signal, and GND of DMX dimming are connected to the D+ input pin, the D- input pin, and the GND pin respectively; when using 0-10V dimming mode, the positive and negative terminals of the 0-10V dimming signal are connected to the D- input pin and the GND pin respectively.

[0024] Secondly, based on the above wiring method, the MCU control circuit determines the type of the input dimming signal as follows: Since the DMX dimming signal has a square wave signal, the voltages of both the D+ and D- input pins will change between high and low levels when a DMX dimming signal is input. Furthermore, since the DALI dimming signal is not connected to the D- input pin, the D-input signal detection circuit directly isolates the voltage signal from the D-input pin and feeds it back to the MCU control circuit. Therefore, when the signal output by the D-input signal detection circuit has a rising edge, the MCU control circuit determines that the common interface network circuit is connected to a DMX dimming signal and controls the second... When the control switch Q6 is turned on, the DMX dimming signal is input to the DMX dimming circuit. When the input dimming signal is a DALI dimming signal, since the D- input pin is not used, there is no voltage input to the D- input pin, so the D- input signal detection circuit will not output. Furthermore, since the DALI dimming signal also sends a high-level voltage of 9.5V-22.5V even when not dimming, the D+ input voltage detection circuit detects the voltage at the D+ input pin, scales it proportionally, and directly feeds it back to the MCU control circuit. Alternatively, it can detect whether the voltage at the D+ input pin meets the aforementioned standard and, if so, feed back a compliance level signal to the MCU control circuit. The MCU control circuit determines whether a DALI dimming signal is connected to the D+ input pin based on whether the voltage fed back by the D+ input voltage detection circuit meets the preset standard. When the MCU control circuit receives feedback from the D+ input voltage detection circuit indicating that the D+ input pin voltage meets the DALI dimming signal voltage standard, and the D- input signal detection circuit has no output, it determines that the input is a DALI dimming signal. The MCU control circuit then controls the first controllable switch Q5 to conduct, inputting the DALI dimming signal to the DALI dimming circuit. When the input dimming signal is a 0-10V dimming signal, the D- input pin will either remain high or remain low (0V), so there will be no level change, and the D- input signal detection circuit will not output a rising edge. By default, 0-10V dimming signals are typically input to the common interface network circuit at maximum brightness (10V). Therefore, the D- input voltage detection circuit can either scale the D- input pin voltage and directly feed it back to the MCU control circuit, or it can determine whether the D- input pin voltage reaches 10V and, if so, feed back the corresponding compliance level signal to the MCU control circuit. When the MCU control circuit receives a signal from the D-input voltage detection circuit indicating that the D-input pin has a voltage of 10V and the D-input signal detection circuit does not output a detection feedback indicating that a rising edge has been detected, the MCU control circuit determines that the input dimming signal is a 0-10V dimming signal and controls the third controllable switch Q7 to turn on, so that the input 0-10V dimming signal is input into the 0-10V dimming circuit.

[0025] In this embodiment, refer to Figure 1 To further improve the safety of the dimming power supply and avoid malfunctions of the controllable switching devices and false feedback of the detection circuits caused by external interference, the MCU control circuit sends control signals to the three controllable switching devices through three first isolation circuits. At the same time, the D+ access voltage detection circuit and the D- access voltage detection circuit respectively feed back the detection results to the MCU control circuit through two second isolation circuits.

[0026] In this embodiment, refer to Figure 3 Specifically, both the D+ and D- input voltage detection circuits employ voltage divider circuits composed of multiple voltage-dividing resistors. The D+ input voltage detection circuit includes resistors R14 and R16, connected in series. The two ends of the series structure formed by resistors R14 and R16 are connected to the D+ input pin and the GND pin, respectively. The connection point between resistors R14 and R16 is connected to the MCU control circuit via a second isolation circuit. The D- input voltage detection circuit includes resistors R25 and R26, connected in series. The two ends of the series structure formed by resistors R25 and R26 are connected to the D- input pin and the GND pin, respectively. When a DALI dimming signal is received at the D+ input pin and the GND pin, the voltage transmitted by the DALI dimming signal is divided by resistors R14 and R16 and then outputs a drive voltage of 0.7V or higher to the corresponding second isolation circuit through the connection point between resistors R14 and R16. This drive second isolation circuit then provides feedback to the MCU control circuit regarding the DALI dimming signal input. When a 0-10V dimming signal is connected to the D-input pin, the 10V dimming signal, after being divided by resistors R25 and R26, will output a driving voltage of more than 0.7V to the corresponding second isolation circuit 2 through the connection node between resistors R25 and R26, driving the corresponding second isolation circuit 2 to provide feedback to the MCU control circuit for the 0-10V dimming signal input.

[0027] Reference Figure 5The second isolation circuit consists of a transistor, an optocoupler, and several resistors. Taking the second isolation circuit 1 corresponding to the D+ access voltage detection circuit as an example, it includes a transistor Q8, resistors R24 and R10, an optocoupler U8, and resistor R11. The base of transistor Q8 is connected to resistor R14, and the base is also connected to the emitter through resistor R24. The emitter of transistor Q8 is grounded, and the collector is connected to the reference voltage VB through resistor R10. The positive terminal of the input of optocoupler U8 is connected to the collector of transistor Q8, and the negative terminal is grounded. One end of the output of optocoupler U8 is connected to a 3.3V reference voltage through resistor R11 and connected to the MCU control circuit, while the other end is connected to signal ground. When the D+ input pin is connected to the DALI dimming signal, transistor Q8 will conduct, optocoupler U8 will not conduct, and the MCU control circuit will receive a high level output from the second isolation circuit 1, indicating that the D+ input pin is connected to the DALI dimming signal. Similarly, when the D- input pin is connected to the 0-10V dimming signal, the second isolation circuit 2 will also output a high level to the MCU control circuit, indicating that the D- input pin is connected to the 0-10V dimming signal.

[0028] Reference Figure 3 In this embodiment, the D-access signal detection circuit includes resistor R15, optocoupler U4, and resistor R17. The positive terminal of the input of optocoupler U4 is connected to the D-input pin through resistor R15. The negative terminal of the input of optocoupler U4 is connected to the GND pin. The first output of optocoupler U4 is connected to a 3.3V reference voltage through resistor R17. The second output of optocoupler U4 is connected to signal ground. The first output of optocoupler U4 is connected to the MCU control circuit. When the D-input pin is high, optocoupler U4 is turned on, connecting its first output to signal ground and outputting a low level to the MCU control circuit; conversely, it is pulled high by the 3.3V reference voltage, outputting a high level to the MCU control circuit. Therefore, when a 0-10V dimming signal is connected to the D-input pin, the D-input signal detection circuit outputs a low level to the MCU control circuit. Thus, when the MCU control circuit receives a high level output from the second isolation circuit 2 and a low level output from the D-input signal detection circuit, it determines that a 0-10V dimming signal has been connected.

[0029] It is understandable that the first controllable switch Q5, the second controllable switch Q6, and the third controllable switch Q7 can be transistors or thyristors, etc. (Refer to...) Figure 3 and Figure 4 In this embodiment, all three controllable switching devices are transistors. The collectors of the transistors are connected to the corresponding D+ input pin, D- input pin, or GND pin, respectively; the emitters are connected to the corresponding dimming circuits; and the bases of the transistors are connected to the MCU control circuits through three first isolation circuits. (Refer to...) Figure 4 The first isolation circuit consists of an optocoupler and several resistors. Taking the first isolation circuit 1 corresponding to the first controllable switch Q5 as an example, it includes an optocoupler U5, resistors R18 and R20. The positive terminal of the input of the optocoupler U5 is connected to the MCU control circuit, and the negative terminal is connected to the signal ground. The first output terminal of the optocoupler U5 is connected to the reference voltage VB through resistor R18 and to the base of the first controllable switch Q5. The second output terminal of the optocoupler U5 is grounded. When the MCU control circuit determines the type of the dimming signal based on the feedback results of the D+ access voltage detection circuit, the D- access signal detection circuit, and the D- access voltage detection circuit, and needs to control the corresponding controllable switch to turn on, it outputs a high-level signal to the input terminal of the optocoupler of the corresponding first isolation circuit, turning on the optocoupler. This causes the base of the corresponding controllable switch to input a high level, thus turning on the controllable switch that needs to be turned on.

[0030] Understandably, MCU control circuits typically consist of an MCU controller and its peripheral circuits, while DC-DC circuits typically consist of a DC-DC chip and its peripheral circuits. (Refer to...) Figure 2 and Figure 3 In this embodiment, to reduce the standby power consumption of the dimming power supply, when the MCU control circuit detects that the input dimming signal indicates a 0V output, the MCU control circuit sends a standby signal to the DC-DC chip through a low-power standby circuit, causing the DC-DC circuit to enter a low-power standby state, thereby reducing the standby power consumption of the dimming power supply. (Refer to...) Figure 3 In this embodiment, the low-power standby circuit includes a transistor Q4 and a resistor R4. The base of transistor Q4 is connected to the MCU control circuit, the emitter is connected to signal ground, and the collector is connected to a 3.3V reference voltage through resistor R4. The collector of transistor Q4 is connected to the enable pin of the DC-DC chip. When it is necessary to control the DC-DC circuit to standby, the MCU control circuit outputs a high level to transistor Q4 to turn on transistor Q4. The collector of transistor Q4 outputs a low level to the high-level enable pin of the DC-DC chip to turn on the DC-DC chip to standby.

[0031] Reference Figure 1 In some embodiments, the dimming power supply further includes a wireless communication setting circuit, which is connected to the MCU control circuit. The wireless communication setting circuit is used to wirelessly communicate with external devices, allowing users to actively configure the dimming mode used by the dimming power supply via devices with wireless communication capabilities, such as mobile phones. Based on the configuration information received by the wireless communication setting circuit, the MCU control circuit controls the corresponding controllable switching devices to turn on, thereby enabling the dimming power supply to operate in the corresponding dimming mode.

[0032] It is understandable that the wireless communication setup circuit can communicate with external devices via wireless communication methods such as Bluetooth, Wi-Fi, or NFC. (See reference...) Figure 3 In this embodiment, the wireless communication setting circuit adopts an NFC communication circuit. Users can modify the dimming power supply configuration via the NFC communication circuit using devices with NFC communication capabilities, such as mobile phones. The dimming power supply can be configured to DMX dimming mode, DALI dimming mode, 0-10V dimming mode, and OFF mode. When configured in DMX, DALI, or 0-10V dimming modes, the MCU control circuit locks the corresponding controllable switching devices in the ON state, ensuring the dimming power supply can only receive dimming signals for that mode. When configured in OFF mode, the MCU control circuit uses the detection results from the common interface network circuit to adaptively control the corresponding controllable switching devices to turn on, adaptively switching to the corresponding dimming mode based on the received dimming signal.

[0033] It should be noted that in the description of this invention, any descriptions of orientation, such as up, down, front, back, left, right, etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings. They are only for the purpose of facilitating the description of this 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 or operated in a specific orientation, and should not be construed as a limitation of this invention.

[0034] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," "exceeding," etc. are understood to exclude the stated number, while "above," "below," "within," etc. are understood to include the stated number. If "first" or "second" is mentioned, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0035] In the description of this invention, unless otherwise explicitly defined, terms such as "setting," "installing," and "connecting" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0036] The above embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A dimming power supply compatible with multiple dimming methods, characterized in that, include: MCU control circuit; The dimming power supply main circuit has its input end connected to AC mains power and its output end connected to the lamp load. It is used to convert AC mains power into power that can drive the lamp load to produce the lighting effect required by the user under the control of the MCU control circuit. The DALI dimming circuit has its output connected to the MCU control circuit and is used to process DALI dimming signals. The DMX dimming circuit has its output connected to the MCU control circuit and is used to process DMX dimming signals. A 0-10V dimming circuit, the output of which is connected to the MCU control circuit, is used to process 0-10V dimming signals; The common interface network circuit includes a D+ input pin, a D- input pin, a GND pin, a D+ access voltage detection circuit, a D- access signal detection circuit, and a D- access voltage detection circuit. The D+ input pin is connected to the first input pin of the DALI dimming circuit via a first controllable switch. The D+ input pin is also connected to the DATA+ pin of the DMX dimming circuit via a second controllable switch. The D- input pin is connected to the DATA- pin of the DMX dimming circuit and also to the positive input pin of the 0-10V dimming circuit via a third controllable switch. The GND pin is connected to the second input pin of the DALI dimming circuit, the ground pin of the DMX dimming circuit, and the negative input pin of the 0-10V dimming circuit. The D+ access voltage detection circuit detects whether the voltage connected to the D+ input pin matches the DALI signal voltage and feeds back the detection result to the MCU control circuit. The D-input signal detection circuit is used to detect whether the D-input pin is connected to a high or low level, and feeds back the detection result to the MCU control circuit. The D-input voltage detection circuit is used to detect whether the D-input pin is connected to a 10V voltage, and feeds back the detection result to the MCU control circuit. When the MCU control circuit detects that the signal output by the D-input signal detection circuit has a rising edge, the MCU control circuit controls the second controllable switch to turn on. When the MCU control circuit receives a signal from the D+input voltage detection circuit indicating that the D+ input pin voltage conforms to the DALI dimming signal voltage standard, and the D-input signal detection circuit has no output, the MCU control circuit controls the first controllable switch to turn on. When the MCU control circuit receives a signal from the D-input voltage detection circuit indicating that the D-input pin has a 10V voltage, and the D-input signal detection circuit does not have a rising edge, the MCU control circuit controls the third controllable switch to turn on.

2. The dimming power supply compatible with multiple dimming modes according to claim 1, characterized in that, The D+ input voltage detection circuit includes resistors R14 and R16, which are connected in series. The two ends of the series structure formed by resistors R14 and R16 are respectively connected to the D+ input pin and the GND pin. The connection node between resistors R14 and R16 is connected to the MCU control circuit.

3. The dimming power supply compatible with multiple dimming modes according to claim 1, characterized in that, The D-access signal detection circuit includes resistor R15, optocoupler U4, and resistor R17. The positive terminal of the input of optocoupler U4 is connected to the D-input pin through resistor R15, and the negative terminal of the input of optocoupler U4 is connected to the GND pin. The first output of optocoupler U4 is connected to the reference voltage through resistor R17, and the second output of optocoupler U4 is connected to signal ground. The first output of optocoupler U4 is also connected to the MCU control circuit.

4. The dimming power supply compatible with multiple dimming modes according to claim 1, characterized in that, The D-input voltage detection circuit includes resistors R25 and R26, which are connected in series. The two ends of the series structure formed by resistors R25 and R26 are respectively connected to the D-input pin and the GND pin. The connection node between resistors R25 and R26 is connected to the MCU control circuit.

5. The dimming power supply compatible with multiple dimming modes according to claim 1, characterized in that, The first controllable switching device, the second controllable switching device, and the third controllable switching device are all transistors.

6. The dimming power supply compatible with multiple dimming modes according to claim 5, characterized in that, The bases of the first controllable switching device, the second controllable switching device, and the third controllable switching device are all connected to the MCU control circuit through a first signal isolation circuit.

7. The dimming power supply compatible with multiple dimming modes according to claim 1, characterized in that, The output terminals of the D+ access voltage detection circuit and the D- access voltage detection circuit are connected to the MCU control circuit through a second isolation circuit.

8. The dimming power supply compatible with multiple dimming modes according to claim 1, characterized in that, It also includes a low-power standby circuit. When the MCU control circuit outputs a signal corresponding to the minimum voltage through the DALI dimming circuit, the DMX dimming circuit or the 0-10V dimming circuit, it sends a standby signal to the dimming power supply main circuit through the low-power standby circuit.

9. The dimming power supply compatible with multiple dimming modes according to claim 1, characterized in that, It also includes a wireless communication setting circuit, which is connected to the MCU control circuit. The wireless communication setting circuit is used to communicate wirelessly with external devices. When the wireless communication setting circuit receives a dimming mode configured by an external device through wireless communication, the MCU control circuit controls the corresponding controllable switch among the first controllable switch, the second controllable switch, and the third controllable switch to be turned on according to the dimming mode type received by the wireless communication setting circuit.

10. The dimming power supply compatible with multiple dimming modes according to claim 9, characterized in that, The wireless communication setup circuit is an NFC communication circuit.

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