A DALI-2 constant current LED power supply supporting data storage interaction

Abstract

This utility model discloses a DALI-2 constant current LED power supply supporting data storage interaction, overcoming the problems of complex circuitry and high cost in existing DALI-2 constant current LED power supplies supporting data storage interaction when implementing various DALI data interactions. It includes: an MCU system circuit and an AC-CDC isolated constant voltage circuit connected to the MCU circuit. The AC-CDC isolated constant voltage circuit is connected to an input voltage detection circuit and a DC-DC constant current circuit. Both the input voltage detection circuit and the DC-DC constant current circuit are connected to the MCU system circuit, which is connected to a DALI interface circuit. The AC-CDC isolated constant voltage circuit includes a flyback constant voltage circuit, which is connected to the DC-DC constant current circuit. Input and output isolation is achieved through a single-stage flyback, and constant current output is achieved through the DC-DC constant current circuit. The data acquisition section collects the output voltage, output current, and input voltage to calculate the corresponding input power and input current information, thereby supporting DALI standard Part data interaction. The circuit structure is simple and the cost is low.

Description

Technical Field

[0001] This utility model relates to the field of LED power supply technology, and in particular to a DALI-2 constant current LED power supply that supports data storage interaction. Background Technology

[0002] DALI dimming solutions are widely used in the LED driver power supply field. DALI Parts 251-253 now standardize data access to the DALI memory block of DALI-2 drivers. Part 251 describes the storage of information related to the luminaire that does not affect the functional operation of the DALI driver. For example, manufacturers can encode material codes or rated light output parameters at the factory and store them in the driver within the luminaire. Once the luminaire is installed in the application, this data can be used by the lighting control network. Owners or contractors can also use this to achieve more efficient and precise management of luminaire assets. Part 252 specifies the data storage and reporting of driver energy consumption and power consumption. Part 253 focuses on various diagnostic and maintenance data related to drivers, light sources, and luminaires.

[0003] Currently, to achieve DALI dimming while supporting DALI Part 251, 252, and 253 data interaction functions, it is usually necessary to add complex detection circuits, such as using a built-in AC power metering module for detection. For example, the Chinese Patent Office published a patent on February 28, 2023, CN218550241U, a smart lighting control device based on the DALI protocol, which includes a communication module, a circuit breaker control module, a dual-color temperature dimming module, an energy metering module, and a main control module. The energy metering module measures power consumption and power parameters to meet the needs of multi-functional control of smart lighting. Its circuit structure is relatively complex and the circuit cost is high. Summary of the Invention

[0004] The purpose of this invention is to overcome the problems of complex circuits and high costs in the existing DALI-2 constant current LED power supply that supports data storage interaction when realizing various DALI data interactions. This invention provides a DALI-2 constant current LED power supply that supports data storage interaction, with simple circuitry and low cost, and supports DALI Part 251, 252, and 253 data interactions.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A DALI-2 constant current LED power supply supporting data storage interaction includes: an MCU system circuit and an AC-CDC isolated constant voltage circuit connected to the MCU circuit. The AC-CDC isolated constant voltage circuit is connected to an input voltage detection circuit and a DC-CDC constant current circuit. Both the input voltage detection circuit and the DC-CDC constant current circuit are connected to the MCU system circuit. The MCU system circuit is connected to a DALI interface circuit. The AC-CDC isolated constant voltage circuit includes a flyback constant voltage circuit, which is connected to the DC-CDC constant current circuit.

[0007] The constant current LED power supply in this application achieves input and output isolation through a single-stage flyback converter, and then achieves constant current output through a DC-DC constant current circuit. The data acquisition section collects the output voltage, output current, and input voltage to calculate the corresponding input power and input current information, thereby supporting DALI standards Part 251, 252, and 253. The circuit structure is simple and the cost is low.

[0008] Preferably, the flyback constant voltage circuit includes a high-voltage start-up circuit, which is connected to a drive circuit. The drive circuit is connected to an RCD snubber circuit, which is connected to a rectifier output circuit. The rectifier output circuit is connected to a DC-DC constant current circuit. The RCD snubber circuit is connected to the high-voltage start-up circuit, and the drive circuit is connected to a peak current sampling circuit.

[0009] Preferably, the ACDC isolation constant voltage circuit includes an input filter rectifier circuit, which is connected to the flyback constant voltage circuit.

[0010] Preferably, a DC-DC auxiliary power supply circuit is also included, which is connected to the MCU system circuit and the rectifier output circuit respectively.

[0011] Preferably, the DALI interface circuit includes a DALI receiving circuit and a DALI transmitting circuit, wherein the DALI receiving circuit is connected to the DALI transmitting circuit, and the DALI transmitting circuit is connected to the MCU system circuit.

[0012] Preferably, the input filter rectifier circuit includes a first common-mode inductor and a second common-mode inductor. The input terminal of the first common-mode inductor is connected to a power supply. A safety capacitor is provided between the output terminal of the first common-mode inductor and the input terminal of the second common-mode inductor. The output terminal of the second common-mode inductor is connected to a rectifier bridge, and the rectifier bridge is connected to a flyback constant voltage circuit.

[0013] Preferably, the input voltage detection circuit includes a winding T1-1A. One end of the winding T1-1A is connected to the positive terminal of a rectifier diode and one end of a filter resistor. The other end of the filter resistor is connected to a filter capacitor. The negative terminal of the rectifier diode is connected to one end of a first voltage divider detection resistor. The other end of the first voltage divider detection resistor is connected to the MCU system circuit and one end of a second voltage divider detection resistor. The other end of the second voltage divider detection circuit is connected to the other end of the winding T1-1A and grounded.

[0014] Preferably, the DALI interface circuit includes a chip. The RX terminal of the chip is connected to the negative terminal of the light-emitting diode in the first optocoupler. The positive terminal of the light-emitting diode in the first optocoupler is connected to a second rectifier bridge and one end of a third voltage divider detection resistor. The other end of the third voltage divider detection resistor is connected to the VS terminal of the chip and grounded. The collector of the phototransistor in the first optocoupler is connected to the positive terminal of the light-emitting diode in the second optocoupler and the collector of the isolation transistor, respectively. The emitter of the isolation transistor is the DALI receiver, and the negative terminal of the light-emitting diode in the second optocoupler is the DALI transmitter. The VCC terminal of the chip is connected to an energy storage capacitor, the TX terminal of the chip is connected to the collector of the light-emitting diode in the second optocoupler, and the CS terminal of the chip is connected to a sampling resistor.

[0015] Therefore, this invention has the following advantages: It utilizes a flyback constant voltage circuit to achieve input and output isolation through a single-stage flyback, and then achieves constant current output through a DC-DC constant current circuit. The data acquisition section adds a forward winding to the transformer to reflect changes in the input voltage and its frequency in real time. With known output current, output voltage, and input voltage, the corresponding input power and other parameters can be calculated, enabling data exchange supporting DALI standards Part 251, 252, and 253. It eliminates the need for a built-in AC power metering module, resulting in a simple circuit structure and low cost. Attached Figure Description

[0016] Figure 1 This is an architecture diagram of the DALI-2 constant current LED power supply that supports data storage interaction in this utility model.

[0017] Figure 2 This is a circuit diagram of the AC-CDC isolation constant voltage circuit in this utility model.

[0018] Figure 3 This is a circuit diagram of the MCU system circuit in this utility model.

[0019] Figure 4 This is a circuit diagram of the DC-DC constant current circuit in this utility model.

[0020] Figure 5 This is a circuit diagram of the DALI interface circuit in this utility model.

[0021] Figure 6 This is a circuit diagram of the input voltage detection circuit in this utility model.

[0022] Figure 7 This is a circuit diagram of the DC-DC auxiliary power supply circuit in this utility model.

[0023] In the diagram: 1. AC / DC isolation constant voltage circuit; 2. MCU system circuit; 3. Input voltage detection circuit; 4. DC / DC constant current circuit; 5. DALI interface circuit. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments:

[0025] Example 1:

[0026] This embodiment is a DALI-2 constant current LED power supply that supports data storage interaction, such as... Figure 1 As shown, it includes an ACCDC isolation constant voltage circuit 1, an MCU system circuit 2, an input voltage detection circuit 3, a DCCDC constant current circuit 4, and a DALI interface circuit 5. The ACCDC isolation constant voltage circuit is connected to the DCCDC constant current circuit, the input voltage detection circuit, and the MCU system circuit, respectively. The DCCDC constant current circuit is connected to the MCU system circuit, the input voltage detection circuit is connected to the MCU system circuit, and the MCU system circuit is connected to the DALI interface circuit.

[0027] The AC-CDC isolated constant voltage module supplies power to both the DC-DC constant current circuit and the MCU system circuit. The MCU system circuit can interact with the DALI port, perform dimming and output voltage / current sampling with the DC-DC constant current circuit, and detect the input voltage. The input voltage detection circuit transmits voltage information to the MCU system circuit; the DALI interface circuit transmits DALI control signals to the MCU system circuit.

[0028] Based on the above structure, the DALI-2 constant current LED power supply supporting data storage interaction provided in this embodiment has the following beneficial effects: The DALI-2 constant current LED power supply supporting data storage interaction provided in this embodiment is a DALI-2 constant current LED power supply that supports Part 251, 252, and 253 data interaction functions. This power supply achieves input and output isolation through a single-stage flyback converter, and then achieves constant current output through a DC-DC converter. The data acquisition section collects the output voltage, output current, and input voltage to calculate the corresponding input power and input current information, thereby supporting DALI standards Part 251, 252, and 253. It supports the EnergyData function, supports energy report reading (DALI Part 252), supports lighting data query function (DALI Part 251), and supports diagnostic and maintenance data reading (DALI Part 253).

[0029] Specifically:

[0030] The ACDC isolation constant voltage circuit includes an input filter rectifier circuit and a flyback constant voltage circuit. The input filter rectifier circuit is connected to the flyback constant voltage circuit, and the flyback constant voltage circuit is connected to the DCDC constant current circuit.

[0031] The flyback constant voltage circuit includes a high-voltage start-up circuit, a drive circuit, an RCD snubber circuit, a rectifier output circuit, and a peak current sampling circuit. The high-voltage start-up circuit is connected to the RCD snubber circuit and the drive circuit. The drive circuit is connected to the peak current sampling circuit and the RCD snubber circuit. The RCD snubber circuit is connected to the rectifier output circuit. The rectifier output circuit is connected to the DC-DC constant current circuit.

[0032] The DALI interface circuit includes a DALI receiving circuit and a DALI transmitting circuit. The DALI receiving circuit is connected to the DALI transmitting circuit, and the DALI transmitting circuit is connected to the MCU system circuit.

[0033] In this embodiment, a DC-DC auxiliary power supply circuit is also included, which is connected to the MCU system circuit and the rectifier output circuit respectively.

[0034] The input filter rectifier circuit includes a first common-mode inductor and a second common-mode inductor. The input terminal of the first common-mode inductor is connected to the power supply. A safety capacitor is provided between the output terminal of the first common-mode inductor and the input terminal of the second common-mode inductor. The output terminal of the second common-mode inductor is connected to the first rectifier bridge, and the rectifier bridge is connected to the flyback constant voltage circuit.

[0035] The input voltage detection circuit includes a winding T1-1A. One end of the winding T1-1A is connected to the positive terminal of the rectifier diode and one end of the filter resistor. The other end of the filter resistor is connected to the filter capacitor. The negative terminal of the rectifier diode is connected to one end of the first voltage divider detection resistor. The other end of the first voltage divider detection resistor is connected to the MCU system circuit and one end of the second voltage divider detection resistor. The other end of the second voltage divider detection circuit is connected to the other end of the winding T1-1A and grounded.

[0036] The DALI interface circuit includes a chip. The RX terminal of the chip is connected to the negative terminal of the LED in the first optocoupler. The positive terminal of the LED in the first optocoupler is connected to the second rectifier bridge and one end of the third voltage divider detection resistor. The other end of the third voltage divider detection resistor is connected to the VS terminal of the chip and grounded. The collector of the phototransistor in the first optocoupler is connected to the positive terminal of the LED in the second optocoupler and the collector of the isolation transistor. The emitter of the isolation transistor is the DALI receiver, and the negative terminal of the LED in the second optocoupler is the DALI transmitter. The VCC terminal of the chip is connected to an energy storage capacitor, the TX terminal of the chip is connected to the collector of the LED in the second optocoupler, and the CS terminal of the chip is connected to a sampling resistor.

[0037] Example 2:

[0038] This embodiment, based on Embodiment 1, adds specific circuit structures to each circuit, providing a DALI-2 constant current LED power supply that supports data storage interaction, such as... Figure 1 As shown, it includes an ACCDC isolation constant voltage circuit 1, an MCU system circuit 2, an input voltage detection circuit 3, a DCCDC constant current circuit 4, and a DALI interface circuit 5. The ACCDC isolation constant voltage circuit is connected to the DCCDC constant current circuit, the input voltage detection circuit, and the MCU system circuit, respectively. The DCCDC constant current circuit is connected to the MCU system circuit, the input voltage detection circuit is connected to the MCU system circuit, and the MCU system circuit is connected to the DALI interface circuit.

[0039] The AC-CDC isolated constant voltage module supplies power to both the DC-DC constant current circuit and the MCU system circuit. The MCU system circuit can interact with the DALI port, perform dimming and output voltage / current sampling with the DC-DC constant current circuit, and detect the input voltage. The input voltage detection circuit transmits voltage information to the MCU system circuit; the DALI interface circuit transmits DALI control signals to the MCU system circuit.

[0040] Based on the above structure, the DALI-2 constant current LED power supply supporting data storage interaction provided in this embodiment has the following beneficial effects: The DALI-2 constant current LED power supply supporting data storage interaction provided in this embodiment is a DALI-2 constant current LED power supply that supports Part 251, 252, and 253 data interaction functions. This power supply achieves input and output isolation through a single-stage flyback converter, and then achieves constant current output through a DC-DC converter. The data acquisition section collects the output voltage, output current, and input voltage to calculate the corresponding input power and input current information, thereby supporting DALI standards Part 251, 252, and 253. It supports the EnergyData function, supports energy report reading (DALI Part 252), supports lighting data query function (DALI Part 251), and supports diagnostic and maintenance data reading (DALI Part 253).

[0041] The ACDC isolation constant voltage circuit includes an input filter rectifier circuit and a flyback constant voltage circuit. The input filter rectifier circuit is connected to the flyback constant voltage circuit, and the flyback constant voltage circuit is connected to the DCDC constant current circuit.

[0042] The flyback constant voltage circuit includes a high-voltage start-up circuit, a drive circuit, an RCD snubber circuit, a rectifier output circuit, and a peak current sampling circuit. The high-voltage start-up circuit is connected to the RCD snubber circuit and the drive circuit. The drive circuit is connected to the peak current sampling circuit and the RCD snubber circuit. The RCD snubber circuit is connected to the rectifier output circuit. The rectifier output circuit is connected to the DC-DC constant current circuit.

[0043] The DALI interface circuit includes a DALI receiving circuit and a DALI transmitting circuit. The DALI receiving circuit is connected to the DALI transmitting circuit, and the DALI transmitting circuit is connected to the MCU system circuit.

[0044] In this embodiment, a DC-DC auxiliary power supply circuit is also included, which is connected to the MCU system circuit and the rectifier output circuit respectively.

[0045] Specifically:

[0046] The input filter and rectifier circuit includes fuse FS3, common-mode inductor LF1 (i.e., the first common-mode inductor), safety capacitor CX1, common-mode inductor LF2 (i.e., the second common-mode inductor), and rectifier bridge DBS1 (i.e., the first rectifier bridge). For example... Figure 2As shown, the two input terminals of common mode inductor LF1 are connected to the L line and N line respectively. A fuse FS3 is installed between the input terminal of common mode inductor LF1 and the L line. A safety capacitor CX1 is placed between the two output terminals of common mode inductor LF1. The two input terminals of common mode inductor LF2 are connected to one end of safety capacitor CX1 respectively. The two output terminals of common mode inductor LF2 are connected to one AC input terminal of rectifier bridge DBS1 respectively. The negative terminal of the DC output of rectifier bridge DBS1 is grounded. The positive terminal of the DC output of rectifier bridge DBS1 is connected to one end of resistor RS3, one end of inductor L3, and one end of capacitor CC1. The other ends of capacitors CC1 and CC2 are grounded. The other end of inductor L3 is grounded to one end of capacitor CC2.

[0047] The high-voltage startup circuit includes resistors RS3 and RS4, and capacitor CS4; the drive circuit includes chip US1, drive resistor RS11, diode DS7, resistor RS12, and MOSFET QS2; the RCD snubber circuit includes diode DS6, resistor RS20, resistor RS21, and capacitor CS7; the peak current sampling circuit includes resistors RS15, RS16, and RS14; and the rectifier output circuit includes diode DS2, capacitor EC2, capacitor EC3, and resistor RS25.

[0048] like Figure 2As shown, the VCC terminal of chip US1 is connected to one end of resistor RS4, one end of capacitor CS4, one end (positive terminal) of electrolytic capacitor EC1, and one end of resistor RS8. The other end of resistor RS4 is connected to the other end of resistor RS3. The other end of capacitor CS4 and the other end of electrolytic capacitor EC1 are grounded. The other end of resistor RS8 is connected to the negative terminal of diode DS8. The positive terminal of diode DS8 is connected to one end of winding T1C and one end of resistor RS27. The other end of winding T1C is grounded. The other end of resistor RS27 is connected to the negative terminal of diode DS10 and one end of resistor RS9. The negative terminal of diode DS10 is grounded. The other end of resistor RS9 is connected to one end of resistor RS10, one end of capacitor CS5, one end of resistor RS26, and the FB / OTP terminal of chip US1. The other ends of resistor RS10, capacitor CS5, and resistor RS26 are grounded. The OUTPUT terminal of chip US1 is connected to... The negative terminal of diode DS7 is connected to one end of resistor RS11. The positive terminal of diode DS and the other end of resistor RS11 are both connected to one end of resistor RS12. The other end of resistor RS12 is connected to one end of resistor RS13 and the gate of MOSFET QS2. The other end of resistor RS13 is connected to one end of resistors RS15 and RS16 and grounded. The source of MOSFET QS2 is connected to the other end of resistor RS15, the other end of resistor R16, and the GS / PF terminal of chip US1. The drain of MOSFET QS2 is connected to the positive terminal of diode DS6 and one end of winding T1B. The negative terminal of diode DS6 is connected to one end of resistor RS18. The other end of resistor RS18 is connected to one end of resistor RS21, one end of resistor RS20, and one end of capacitor CS7. The other ends of resistor RS21, resistor RS20, and capacitor CS7 are respectively connected to the other end of inductor L3 and the other end of winding T1B.

[0049] One end of winding T1A is grounded, and the other end of winding T1A is connected to the positive terminal of diode DS2. The negative terminal of diode DS2 is connected to one end of capacitor EC2, one end of capacitor EC3, and one end of resistor RS25. The other ends of capacitor EC2, capacitor EC3, and resistor RS25 are grounded.

[0050] The MCU system circuit includes chip US6, filter capacitor CS20, capacitor CS22, and capacitor CS24, such as... Figure 3As shown, the BOOT0 terminal of chip US6 is connected to one end of resistor RS45, and the other end of resistor RS45 is grounded; the PA5 terminal of chip US6 is the DALI transmit interface, connected to the other end of resistor RS42; the PA6 terminal of chip US6 is the DALI receive interface, connected to the emitter of isolation transistor QS3; the PA1 terminal of chip US6 is connected to one end of capacitor CS22, and the other end of capacitor CS22 is grounded; the VDDA terminal of chip US6 is connected to the VCC terminal and one end of filter capacitor CS20, and the other end of filter capacitor CS20 is grounded; the VDD terminal of chip US6 is connected to the VCC terminal and one end of capacitor CS24, and the other end of capacitor CS24 is grounded; the VSS terminal of chip US6 is grounded.

[0051] The DC-DC constant current circuit includes resistor RS1, chip US2, freewheeling diode DS1, inductor L5, output capacitor EC4, capacitor CS16, sampling resistor RS2, and sampling resistor RS6.

[0052] like Figure 4 As shown, the VCC terminal of chip US2 is connected to one end of capacitor CS2, and the other end of capacitor CS2 is grounded; the VIN terminal of chip US2 is connected to one end of resistor RS1, and the other end of resistor RS1 is the output terminal and is connected to the DRAIN terminal of chip US5. The other end of resistor RS1 is connected to one end of resistor RS25, the positive terminal of electrolytic capacitor EC3, the positive terminal of electrolytic capacitor EC2, and the negative terminal of diode DS2. The Drain terminal of chip US2 is connected to the positive terminal of freewheeling diode DS1 and one end of inductor L5. The negative terminal of freewheeling diode DS1 is connected to the other end of resistor RS1, the positive terminal of output capacitor EC4, one end of resistor RS28, and one end of capacitor CS16. The other ends of resistor RS28 and capacitor CS16 are both connected to the other end of inductor L5. The two ends of capacitor CS16 are connected to a 2-pin connector; the ISN terminal of chip US2 is connected to one end of sampling resistor RS2 and one end of sampling resistor RS6. The other end of sampling resistor RS2 and sampling resistor RS5 are connected to the other end of sampling resistor RS6. 6. The other end is connected to one end of resistor RS17 and grounded, and the other end of resistor RS17 is connected to the CFG terminal of chip US2.

[0053] The DALI receiving circuit includes a rectifier bridge BDS1 (the second rectifier bridge), an optocoupler US8 (the first optocoupler), an energy storage capacitor CS25, a voltage divider detection resistor RS51 (the third voltage divider detection resistor), resistors RS55 and RS56, and an isolation transistor QS3, resistors RS47, RS48, and RS44, along with capacitor CS32 for shaping and filtering. The DALI transmitting circuit includes a second optocoupler US4, resistor RS3, chip US9, and sampling resistor RS54.

[0054] like Figure 5As shown, the RX terminal of chip US9 is connected to one end of resistor RS49, and the other end of resistor RS49 is connected to the negative terminal of LED US8B in optocoupler US8. The positive terminal of LED US8B in optocoupler US8 is connected to the positive terminal of the DC output of rectifier bridge BDS1, and the negative terminal of the DC output of rectifier bridge BDS1 is grounded. The DRAIN terminal of chip US9 is connected to the positive terminal of LED US8B in optocoupler US8, one end of resistor RS50, and one end of voltage divider detection resistor RS51. The other end of resistor RS50 is connected to the HV terminal of chip US9. The VS terminal of chip US9 is connected to one end of resistor RS55 and one end of resistor R56. The other end of resistor RS55 is connected to the other end of voltage divider detection resistor R51, and the other end of resistor R56 is grounded. The CS terminal of chip US9 is connected to one end of resistor RS54, and the other end of resistor RS54 is grounded. The GND terminal of chip US9 is grounded. The VCC terminal of chip US9 is connected to one end of energy storage capacitor CS25. The other end of capacitor CS25 is grounded; one end of the TX pin of chip US9 is connected to the collector of phototransistor US4A in optocoupler US4, and the emitter of phototransistor US4A in optocoupler US4 is grounded; the collector of phototransistor US8A in optocoupler US8 is connected to one end of resistor RS44, the 5V power supply, and the positive terminal of LED US4B in optocoupler US4; the negative terminal of LED US4B in optocoupler US4 is connected to one end of resistor RS42, and the other end of resistor RS42 is connected to the diode. The ALI transmitter is connected to the MCU system circuit; the emitter of the phototransistor US8A in optocoupler US8 is connected to the base of the isolation transistor QS3 and one end of resistor RS47, with the other end of resistor RS47 grounded; the collector of the isolation transistor QS3 is connected to the other end of resistor RS44; the emitter of the isolation transistor QS3 is connected to one end of resistor RS48 and one end of capacitor CS23 and serves as the DALI receiver, with the other ends of resistor RS48 and capacitor CS23 grounded.

[0055] The input voltage detection circuit includes winding T1-1A, resistor RS53, rectifier diode DS15, filter resistor RS52, filter capacitor CS11, voltage divider detection resistor RS61 (i.e., the first voltage divider detection resistor), voltage divider detection resistor R6S2 (i.e., the second voltage divider detection resistor), and capacitor CS13.

[0056] like Figure 6As shown, one end of winding T1-1A is grounded, and the other end of winding T1-1A is connected to one end of resistor RS53. The other end of resistor RS53 is connected to one end of filter resistor RS52 and the positive terminal of rectifier diode DS15. The other end of filter resistor RS52 is connected to one end of filter capacitor CS11, and the other end of filter capacitor CS11 is grounded. The negative terminal of rectifier diode DS15 is connected to one end of capacitor CS13 and one end of voltage divider detection resistor RS61, and the other end of capacitor CS13 is grounded. The other end of voltage divider detection resistor RS61 is connected to one end of voltage divider detection resistor RS62, one end of capacitor CS13, and the PA1 terminal of chip US6. The other end of voltage divider detection resistor RS62 is grounded, and the other end of capacitor CS13 is grounded.

[0057] The DC-DC auxiliary power supply circuit includes chip US5, freewheeling diode DS16, output electrolytic capacitor EC5, power supply diode DS17, and sampling resistor RS5. For example... Figure 7 As shown, the DRAIN terminal of chip US5 is the output terminal. The VCC terminal of chip US5 is connected to one end of capacitor CS14 and the negative terminal of power supply diode DS17. The positive terminal of power supply diode DS17 is connected to VCC terminal, one end of inductor L4 and the positive terminal of output electrolytic capacitor EC5. The negative terminal of output electrolytic capacitor EC5 is grounded. The other end of capacitor CS14 is connected to the SEL terminal and GND terminal of chip US5. The CS terminal of chip US5 is connected to one end of sampling resistor RS5. The other end of sampling resistor RS5 is connected to the other end of inductor L4 and the negative terminal of freewheeling diode DS16. The positive terminal of freewheeling diode DS16 is grounded.

[0058] This embodiment provides a DALI-2 constant current LED power supply that supports data storage interaction. It involves a simple modification to the circuit of a traditional DALI dimming power supply, resulting in a simple, low-cost DALI-2 constant current LED power supply that supports DALI Part 251, 252, and 253 data interaction functions. By adding a positive winding to the transformer, it can react in real-time to changes in the input voltage and its frequency. Given the output current, output voltage, and input voltage, the corresponding input power and other parameters can be calculated. The circuit structure is simple and the cost is low.

[0059] The embodiments described above are merely preferred solutions of this utility model and are not intended to limit this utility model in any way. Other variations and modifications are possible without departing from the technical solutions described in the claims.

Claims

1. A DALI-2 constant current LED power supply supporting data storage interaction, characterized in that, include: The MCU system circuit and the AC-CDC isolated constant voltage circuit connected to the MCU circuit are included. The AC-CDC isolated constant voltage circuit is connected to an input voltage detection circuit and a DC-CDC constant current circuit. Both the input voltage detection circuit and the DC-CDC constant current circuit are connected to the MCU system circuit. The MCU system circuit is connected to a DALI interface circuit. The AC-CDC isolated constant voltage circuit includes a flyback constant voltage circuit, which is connected to the DC-CDC constant current circuit.

2. The DALI-2 constant current LED power supply supporting data storage interaction according to claim 1, characterized in that, The flyback constant voltage circuit includes a high-voltage start-up circuit, which is connected to a drive circuit. The drive circuit is connected to an RCD snubber circuit, which is connected to a rectifier output circuit. The rectifier output circuit is connected to a DC-DC constant current circuit. The RCD snubber circuit is connected to the high-voltage start-up circuit. The drive circuit is connected to a peak current sampling circuit.

3. A DALI-2 constant current LED power supply supporting data storage interaction according to claim 1 or 2, characterized in that, The AC-CDC isolated constant voltage circuit includes an input filter rectifier circuit, which is connected to the flyback constant voltage circuit.

4. A DALI-2 constant current LED power supply supporting data storage interaction according to claim 1 or 2, characterized in that, It also includes a DC-DC auxiliary power supply circuit, which is connected to the MCU system circuit and the rectifier output circuit respectively.

5. The DALI-2 constant current LED power supply supporting data storage interaction according to claim 1, characterized in that, The DALI interface circuit includes a DALI receiving circuit and a DALI transmitting circuit. The DALI receiving circuit is connected to the DALI transmitting circuit, and the DALI transmitting circuit is connected to the MCU system circuit.

6. A DALI-2 constant current LED power supply supporting data storage interaction according to claim 3, wherein the input filtering and rectifier circuit includes a first common-mode inductor and a second common-mode inductor, the input terminal of the first common-mode inductor is connected to the power supply, a safety capacitor is provided between the output terminal of the first common-mode inductor and the input terminal of the second common-mode inductor, the output terminal of the second common-mode inductor is connected to a first rectifier bridge, and the first rectifier bridge is connected to a flyback constant voltage circuit.

7. A DALI-2 constant current LED power supply supporting data storage interaction according to claim 1, 2, or 5, characterized in that, The input voltage detection circuit includes a winding. One end of the winding is connected to the positive terminal of a rectifier diode and one end of a filter resistor. The other end of the filter resistor is connected to a filter capacitor. The negative terminal of the rectifier diode is connected to one end of a first voltage divider detection resistor. The other end of the first voltage divider detection resistor is connected to the MCU system circuit and one end of a second voltage divider detection resistor. The other end of the second voltage divider detection circuit is connected to the other end of the winding and grounded.

8. A DALI-2 constant current LED power supply supporting data storage interaction according to claim 1 or 5, characterized in that, The DALI interface circuit includes a chip. The RX terminal of the chip is connected to the negative terminal of the light-emitting diode in the first optocoupler. The positive terminal of the light-emitting diode in the first optocoupler is connected to a second rectifier bridge and one end of a third voltage divider detection resistor. The other end of the third voltage divider detection resistor is connected to the VS terminal of the chip and grounded. The collector of the phototransistor in the first optocoupler is connected to the positive terminal of the light-emitting diode in the second optocoupler and the collector of the isolation transistor. The emitter of the isolation transistor is the DALI receiver, and the negative terminal of the light-emitting diode in the second optocoupler is the DALI transmitter. The VCC terminal of the chip is connected to an energy storage capacitor, the TX terminal of the chip is connected to the collector of the light-emitting diode in the second optocoupler, and the CS terminal of the chip is connected to a sampling resistor.

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