Communication circuit, PCB and iron shell power supply

Abstract

The utility model discloses a communication circuit, a PCB and an iron casing power supply, a communication unit comprises a near field communication unit and a control unit, the near field communication unit comprises a second control chip U2, and the control unit comprises a first control chip U1; a pin AC0 and a pin AC1 of the second control chip U2 are used for acquiring a wireless input signal, a pin RF, a pin SCL and a pin SDA of the second control chip U2 are correspondingly connected with a pin PA11, a pin PA9 and a pin PA10 of the first control chip U1 respectively, and a pin PB6 and a pin PB7 of the first control chip U1 are used for outputting a control signal to a drive board of an iron shell power supply; the communication circuit disclosed by the utility model comprises the near field communication unit, and when a client needs to adapt the iron shell power supply to scenes with different lamp currents, the client only needs to use a mobile phone or a specific inductor to execute one-time NFC function scanning on the iron shell power supply, so that the input or modification of the required load current can be realized; therefore, the requirement of matching with lamps with different loads is met.

Description

Technical Field

[0001] This utility model relates to the field of driving power supply technology, and in particular to a communication circuit, PCB board and iron shell power supply. Background Technology

[0002] In the existing technology, to address the adaptability of user-end load lighting fixtures under different power and current application scenarios, users usually need to manually operate the DIP switch on the driver power supply to adjust it to the corresponding position in order to achieve precise control of the output current of the driver power supply, thereby ensuring the stable operation of the lighting fixtures.

[0003] However, this manual adjustment method has several potential drawbacks. Specifically, users may encounter a series of risks and inconveniences during the operation, including but not limited to the risk of operational errors, inconvenience in the adjustment process, potential wear and tear on the DIP switches, low level of automation, and potential safety hazards. All of the aforementioned factors may negatively impact the user experience and the safety of the device.

[0004] It is evident that existing technologies still need improvement and enhancement. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a communication circuit with the advantages of convenient current adjustment and high adjustment flexibility.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A communication circuit includes a near-field communication unit and a control unit. The near-field communication unit includes a second control chip U2, and the control unit includes a first control chip U1. Pins AC0 and AC1 of the second control chip U2 are used to acquire wireless input signals. Pins RF, SCL, and SDA of the second control chip U2 are respectively connected to pins PA11, PA9, and PA10 of the first control chip U1. Pins PB6 and PB7 of the first control chip U1 are used to output control signals to the driver board of the metal-cased power supply.

[0008] In the communication circuit, the near-field communication unit further includes a first filter section and a second filter section. The first filter section is connected to pin AC0 and pin AC1 of the second control chip U2, respectively. One end of the second filter section is used to connect to an external power supply device, and the other end of the second filter section is connected to pin VCC of the second control chip U2.

[0009] In the communication circuit described, the near-field communication unit further includes a pull-up section. One end of the pull-up section is used to connect to an external power supply device, and the other end of the pull-up section is connected to pins RF, SCL, and SDA of the second control chip U2, respectively.

[0010] In the communication circuit, the control unit further includes a reset unit. One end of the reset unit and pin VDD of the first control chip U1 are respectively used to connect to an external power supply device, and the other end of the reset unit is connected to pin NRST of the first control chip U1.

[0011] The communication circuit further includes a bidirectional communication unit, the input of which is used to acquire DALI signals, and the output of which is connected to the input of the control unit.

[0012] In the communication circuit described above, the bidirectional communication unit includes an input processing unit, a third control chip U3, and an isolation unit. The input terminal of the input processing unit is used to acquire the DALI signal. The output terminal of the input processing unit is connected to the DRAIN, HV, and VS pins of the third control chip U3 and the second transmitting terminal of the isolation unit, respectively. The RX and TX pins of the third control chip U3 are connected to the second transmitting terminal and the first receiving terminal of the isolation unit, respectively. The first transmitting terminal of the isolation unit is connected to the PA4 and PA3 pins of the first control chip U1, and the second receiving terminal of the isolation unit is connected to the PA8 pin of the first control chip U1.

[0013] In the communication circuit described, the input processing unit includes a protection group, a rectification group, a power control group, and a voltage divider group. The input terminal of the protection group is used to acquire the DALI signal, and the output terminal of the protection group is connected to the input terminal of the rectification group. The output terminal of the rectification group is connected to one end of the voltage divider group, the drain terminal of the power control group, and the DRAIN and HV pins of the third control chip U3, respectively. The other end of the voltage divider group is connected to the VS pin of the third control chip U3, and the other end of the power control group is connected to the second transmitter terminal of the isolation unit.

[0014] In the communication circuit, the isolation section includes a first isolation group and a second isolation group. The pins TX and RX of the third control chip U3 are respectively connected to the receiving end of the first isolation group and the transmitting end of the second isolation group. The transmitting end of the second isolation group is also connected to the source end of the power control group. The transmitting end of the first isolation group is connected to the pins PA4 and PA3 of the first control chip U1, and the receiving end of the second isolation group is connected to the pin PA8 of the first control chip U1.

[0015] This utility model also provides a PCB board on which the communication circuits described above are printed.

[0016] This utility model also provides a metal-cased power supply, which uses any of the communication circuits described above to achieve information exchange with external devices.

[0017] Beneficial effects:

[0018] This invention provides a communication circuit, including a near-field communication unit. When a customer needs to adapt a metal-cased power supply to different lighting currents, they only need to use a mobile phone or a specific sensor to perform an NFC scan on the metal-cased power supply once to input or modify the required load current, thereby meeting the needs of matching different load lighting fixtures. This not only simplifies the power supply adaptation process but also improves the flexibility and convenience of use, reduces the risk of lighting fixture damage due to current mismatch, extends the service life of the lighting fixtures, and ensures the efficient operation of the lighting system. Attached Figure Description

[0019] Figure 1 A circuit block diagram of the communication circuit provided by this utility model;

[0020] Figure 2 The circuit schematic diagram of the control unit provided by this utility model;

[0021] Figure 3 Circuit schematic diagram of the near-field communication unit provided by this utility model;

[0022] Figure 4 The circuit diagram of the bidirectional communication unit provided by this utility model.

[0023] Explanation of key component symbols: 1-Near field communication unit, 11-First filter section, 12-Second filter section, 13-Pull-up section, 2-Control unit, 21-Reset section, 3-Bidirectional communication unit, 31-Input processing section, 32-Isolation section. Detailed Implementation

[0024] This utility model provides a communication circuit, a PCB board, and a metal-cased power supply. To make the purpose, technical solution, and effects of this utility model clearer and more explicit, the following describes this utility model in further detail with reference to the accompanying drawings and examples.

[0025] In the description of this utility model, it should be understood that the terms "installation" and "connection" should be interpreted broadly, and those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] Please see Figures 1 to 4This utility model provides a communication circuit, including a near-field communication unit 1 and a control unit 2. The near-field communication unit 1 includes a second control chip U2, and the control unit 2 includes a first control chip U1. The pins AC0 and AC1 of the second control chip U2 are used to acquire wireless input signals. The pins RF, SCL, and SDA of the second control chip U2 are respectively connected to the pins PA11, PA9, and PA10 of the first control chip U1. The pins PB6 and PB7 of the first control chip U1 are used to output control signals to the driver board of the iron-shell power supply.

[0027] This application provides a communication circuit, including a near-field communication unit 1. When a customer needs to adapt a metal-cased power supply to different lighting fixture currents, they only need to use a mobile phone or a specific sensor to perform an NFC scan on the metal-cased power supply once to input or modify the required load current, thereby meeting the needs of matching different load lighting fixtures. This not only simplifies the power supply adaptation process but also improves the flexibility and convenience of use, reduces the risk of lighting fixture damage due to current mismatch, thereby extending the service life of the lighting fixtures and ensuring the efficient operation of the lighting system composed of the metal-cased power supply and the lighting fixtures.

[0028] In this embodiment, the first control chip U1 is model CS32F031K8U6H, and the second control chip U2 is model ST25DV04K-IER6S3.

[0029] Further, please refer to Figure 1 and Figure 3 The near-field communication unit 1 further includes a first filter section 11 and a second filter section 12. The first filter section 11 is connected to pin AC0 and pin AC1 of the second control chip U2, respectively. One end of the second filter section 12 is used to connect to an external power supply device, and the other end of the second filter section 12 is connected to pin VCC of the second control chip U2.

[0030] In this embodiment, please refer to Figure 3The first filter section 11 includes a thirty-sixth capacitor C36 and a thirty-seventh capacitor C37, and the second filter section 12 includes a sixth capacitor C6 and a tenth capacitor C10. One end of the thirty-sixth capacitor C36 and one end of the thirty-seventh capacitor C37 are respectively connected to pin AC0 of the second control chip U2, and the other end of the thirty-sixth capacitor C36 and the other end of the thirty-seventh capacitor C37 are respectively connected to pin AC1 of the second control chip U2. One end of the sixth capacitor C6, one end of the tenth capacitor C10, and pin VCC of the second control chip U2 are respectively connected to an external power supply device, which provides a 3.3V DC voltage. The other end of the sixth capacitor C6 and the other end of the tenth capacitor C10 are respectively grounded.

[0031] In this embodiment, the first filter unit 11 effectively filters out high-frequency noise from external communication devices, ensuring the signal quality of the near-field communication unit 1 and thus improving the stability and reliability of communication. Secondly, the second filter unit 12 filters out power supply noise that may be caused by external power supply devices, providing a clean and stable 3.3V DC voltage for the second control chip U2, thereby ensuring the normal operation of the near-field communication unit 1. Through the combined action of the first filter unit 11 and the second filter unit 12, not only is the communication quality and stability of the near-field communication unit 1 improved, but its resistance to external interference is also enhanced, enabling the near-field communication unit 1 to maintain good working performance in various environments.

[0032] Further, please refer to Figure 1 and Figure 3 The near-field communication unit 1 further includes a pull-up section 13. One end of the pull-up section 13 is used to connect to an external power supply device, and the other end of the pull-up section 13 is connected to pins RF, SCL and SDA of the second control chip U2, respectively.

[0033] In this embodiment, please refer to Figure 3 The pull-up portion 13 includes a 33rd resistor R33, a 43rd resistor R43, and an 82nd resistor R82. One end of the 33rd resistor R33, one end of the 43rd resistor R43, and one end of the 82nd resistor R82 are respectively used to connect to an external 3.3V power supply device. The other ends of the 33rd resistor R33, the 43rd resistor R43, and the 82nd resistor R82 are respectively connected to pin SDA, pin SCL, and pin RF of the second control chip U2.

[0034] In this embodiment, the pull-up portion 13 is used to determine the voltage level of the NFC module pins, ensuring that the signal remains stable and reliable during communication. Specifically, the pull-up portion 13 prevents signal drift and noise interference by providing an appropriate voltage level, thereby ensuring data integrity and security during communication.

[0035] Further, please refer to Figure 1 and Figure 2 The control unit 2 further includes a reset unit 21. One end of the reset unit 21 and the pin VDD of the first control chip U1 are respectively used to connect to an external power supply device. The other end of the reset unit 21 is connected to the pin NRST of the first control chip U1.

[0036] In this embodiment, please refer to Figure 2 The reset unit 21 includes an eighty-seventh resistor R87 and a twenty-seventh capacitor C27. One end of the eighty-seventh resistor R87 is used to connect to an external 3.3V power supply device. The other end of the eighty-seventh resistor R87 and one end of the twenty-seventh capacitor C27 are respectively connected to the NRST pin of the first control chip U1. The other end of the twenty-seventh capacitor C27 is grounded.

[0037] In this embodiment, the reset unit 21 is used to perform a reset operation on the first control chip U1 when the power is turned on or when certain specific situations are encountered, so as to ensure that the first control chip U1 can successfully perform the initialization process and thus ensure its normal operation.

[0038] Further, please refer to Figure 1 The communication circuit further includes a bidirectional communication unit 3, the input of which is used to acquire DALI signals, and the output of which is connected to the input of the control unit 2.

[0039] In this embodiment, the communication circuit further includes a bidirectional communication unit 3. The input terminal of the bidirectional communication unit 3 is used to acquire DALI signals, while its output terminal is connected to the input terminal of the control unit 2. With this configuration, the communication circuit can not only efficiently receive and process instructions and data from the DALI bus to achieve precise control of the lighting equipment, but also enhance the flexibility and scalability of the lighting system, providing users with a more intelligent and efficient lighting solution.

[0040] Further, please refer to Figure 1 and Figure 4The bidirectional communication unit 3 includes an input processing unit 31, a third control chip U3, and an isolation unit 32. The input terminal of the input processing unit 31 is used to acquire DALI signals. The output terminal of the input processing unit 31 is connected to the DRAIN, HV, and VS pins of the third control chip U3 and the second transmitting terminal of the isolation unit 32, respectively. The RX and TX pins of the third control chip U3 are connected to the second transmitting terminal and the first receiving terminal of the isolation unit 32, respectively. The first transmitting terminal of the isolation unit 32 is connected to the PA4 and PA3 pins of the first control chip U1, and the second receiving terminal of the isolation unit 32 is connected to the PA8 pin of the first control chip U1.

[0041] In this embodiment, the third control chip U3 is model BP5016.

[0042] Further, please refer to Figure 4 The input processing unit 31 includes a protection group, a rectification group, a power control group, and a voltage divider group. The input terminal of the protection group is used to acquire the DALI signal. The output terminal of the protection group is connected to the input terminal of the rectification group. The output terminal of the rectification group is connected to one end of the voltage divider group, the drain terminal of the power control group, and the DRAIN and HV pins of the third control chip U3, respectively. The other end of the voltage divider group is connected to the VS pin of the third control chip U3, and the other end of the power control group is connected to the second transmitter terminal of the isolation unit 32.

[0043] In this embodiment, please refer to Figure 4The protection group includes a first fusible resistor FR1, a first varistor VAR1, and a first excitation coil LF1; the rectifier group includes a rectifier bridge BD1; the power control group includes a first power transistor Q1; and the voltage divider group includes a thirty-seventh resistor R37, a thirty-sixth resistor R36, and a first resistor R1. One end of the first fusible resistor FR1 is used to acquire the DALI signal, and the other end of the first fusible resistor FR1 is connected to one end of the first varistor VAR1 and one end of the first excitation coil LF1, respectively. The other end of the first varistor VAR1 and the other end of the first excitation coil LF1 are respectively connected to... The input terminal of the rectifier bridge BD1 is connected to the ground, and the output terminal of the rectifier bridge BD1 is connected to one end of the thirty-seventh resistor R37, the DRAIN pin of the first power transistor Q1, and the DRAIN and HV pins of the third control chip U3, respectively. The other end of the thirty-seventh resistor R37 is connected to one end of the thirty-sixth resistor R36, and the other end of the thirty-sixth resistor R36 and one end of the first resistor R1 are connected to the VS pin of the third control chip U3, respectively. The CS pin of the first power transistor Q1 is connected to the emitter terminal of the second isolation group, and the other end of the first resistor R1 is grounded.

[0044] In this embodiment, firstly, the protection group design effectively protects the input DALI signal. The first fusible resistor FR1 can melt when the current is too high, preventing circuit damage; the first varistor VAR1 can limit overvoltage, protecting subsequent circuits from damage; the first excitation coil LF1 is used to further stabilize the input signal and improve the signal's anti-interference capability. Secondly, the rectifier group uses a rectifier bridge BD1, which can convert the input AC signal into a stable DC signal, providing a stable operating voltage for subsequent circuits. Furthermore, the power control group uses the first power transistor Q1 to effectively control the circuit power. The drain of the first power transistor Q1 is connected to the rectifier bridge BD1. The output of D1 is connected to the DRAIN and HV pins of the third control chip U3, enabling precise power adjustment to meet different operating requirements. Furthermore, the voltage divider group, through the combination of resistors R37 (37), R36 (36), and R1 (1), divides the input voltage, providing a suitable reference voltage for the third control chip U3. This voltage divider design not only improves the circuit's flexibility but also enhances its stability and reliability. Finally, by connecting the CS pin of the first power transistor Q1 in the power control group to the emitter of the second isolation group, effective isolation and protection of the circuit are achieved, further improving its safety and reliability.

[0045] Further, please refer to Figure 4The isolation unit 32 includes a first isolation group and a second isolation group. The pins TX and RX of the third control chip U3 are respectively connected to the receiving end of the first isolation group and the transmitting end of the second isolation group. The transmitting end of the second isolation group is also connected to the source end of the power control group. The transmitting end of the first isolation group is connected to the pins PA4 and PA3 of the first control chip U1, and the receiving end of the second isolation group is connected to the pin PA8 of the first control chip U1.

[0046] In this embodiment, please refer to Figure 4 The first isolation group includes a first optocoupler B1, and the second isolation group includes a second optocoupler B2. The TX and RX pins of the third control chip U3 are respectively connected to the receiving end of the first optocoupler B1 and the transmitting end of the second optocoupler B2. The transmitting end of the second optocoupler B2 is also connected to the CS pin of the first power transistor Q1. The transmitting end of the first optocoupler B1 is connected to the PA4 and PA3 pins of the first control chip U1, and the receiving end of the second optocoupler B2 is connected to the PA8 pin of the first control chip U1.

[0047] In this embodiment, by designing an isolation structure including a first isolation group and a second isolation section 32, signal isolation between the third control chip U3 and the first control chip U1 is achieved, effectively avoiding signal interference and improving the stability and reliability of the system. Specifically, the first isolation group and the second isolation group respectively adopt a first optocoupler B1 and a second optocoupler B2. Optical couplers, as isolation elements, have advantages such as high isolation voltage, high transmission efficiency, and strong anti-interference ability, further enhancing the isolation effect and stability of the system. The connection method between the two optocouplers and the two control chips ensures accurate signal transmission and also facilitates the first control chip U1 to process the feedback signal of the third control chip U3 in a timely manner, improving the system's response speed and automation level.

[0048] This utility model also provides a PCB board on which the communication circuits described above are printed.

[0049] This utility model also provides a metal-cased power supply, which uses any of the communication circuits described above to achieve information exchange with external devices.

[0050] It is understood that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of this utility model, and all such substitutions or changes should fall within the protection scope of this utility model.

Claims

1. A communication circuit, characterized in that, The device includes a near-field communication unit and a control unit. The near-field communication unit includes a second control chip U2, and the control unit includes a first control chip U1. Pins AC0 and AC1 of the second control chip U2 are used to acquire wireless input signals. Pins RF, SCL, and SDA of the second control chip U2 are respectively connected to pins PA11, PA9, and PA10 of the first control chip U1. Pins PB6 and PB7 of the first control chip U1 are used to output control signals to the driver board of the metal-cased power supply.

2. The communication circuit according to claim 1, characterized in that, The near-field communication unit further includes a first filter section and a second filter section. The first filter section is connected to pin AC0 and pin AC1 of the second control chip U2, respectively. One end of the second filter section is used to connect to an external power supply device, and the other end of the second filter section is connected to pin VCC of the second control chip U2.

3. A communication circuit according to claim 2, characterized in that, The near-field communication unit also includes a pull-up section, one end of which is used to connect to an external power supply device, and the other end of which is connected to pins RF, SCL and SDA of the second control chip U2, respectively.

4. A communication circuit according to claim 2, characterized in that, The control unit also includes a reset unit, one end of which and pin VDD of the first control chip U1 are respectively used to connect to an external power supply device, and the other end of which is connected to pin NRST of the first control chip U1.

5. A communication circuit according to claim 1, characterized in that, It also includes a bidirectional communication unit, the input of which is used to acquire DALI signals, and the output of which is connected to the input of the control unit.

6. A communication circuit according to claim 5, characterized in that, The bidirectional communication unit includes an input processing unit, a third control chip U3, and an isolation unit. The input terminal of the input processing unit is used to acquire DALI signals. The output terminal of the input processing unit is connected to the DRAIN, HV, and VS pins of the third control chip U3 and the second transmitting terminal of the isolation unit, respectively. The RX and TX pins of the third control chip U3 are connected to the second transmitting terminal and the first receiving terminal of the isolation unit, respectively. The first transmitting terminal of the isolation unit is connected to the PA4 and PA3 pins of the first control chip U1, and the second receiving terminal of the isolation unit is connected to the PA8 pin of the first control chip U1.

7. A communication circuit according to claim 6, characterized in that, The input processing unit includes a protection group, a rectification group, a power control group, and a voltage divider group. The input terminal of the protection group is used to acquire the DALI signal. The output terminal of the protection group is connected to the input terminal of the rectification group. The output terminal of the rectification group is connected to one end of the voltage divider group, the drain terminal of the power control group, and the DRAIN and HV pins of the third control chip U3, respectively. The other end of the voltage divider group is connected to the VS pin of the third control chip U3, and the other end of the power control group is connected to the second transmitter terminal of the isolation unit.

8. A communication circuit according to claim 7, characterized in that, The isolation unit includes a first isolation group and a second isolation group. The pins TX and RX of the third control chip U3 are respectively connected to the receiving end of the first isolation group and the transmitting end of the second isolation group. The transmitting end of the second isolation group is also connected to the source end of the power control group. The transmitting end of the first isolation group is connected to the pins PA4 and PA3 of the first control chip U1, and the receiving end of the second isolation group is connected to the pin PA8 of the first control chip U1.

9. A PCB board, characterized in that, The PCB board is printed with the communication circuit as described in any one of claims 1-8.

10. A power supply with an iron casing, characterized in that, The iron-shell power supply uses the communication circuit described in any one of claims 1-8 to achieve information exchange with external devices.

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