Matrix lamp with power input controlled by ideal diode

Abstract

According to the matrix lamp with the power supply input controlled by the ideal diode, the power supply input is controlled by the ideal diode power supply control module, the power supply is controlled to supply power to the SBC module, the SBC module directly receives a wake-up signal to realize power supply management, the main control module does not need to be powered on at the moment, and compared with the prior art, the matrix lamp has the advantages that quiescent current is smaller, and the service life is prolonged. The overall consumption of the system is reduced; and the ideal diode power supply control module can realize overvoltage protection and power supply reverse connection protection, and is high in integration.

Description

Technical Field

[0001] The utility model relates to the field of matrix lamp control, in particular to a matrix lamp whose power input is controlled by an ideal diode. Background Art

[0002] Matrix headlights are developing rapidly, and their application rate is constantly increasing. Their effect design can greatly improve the appearance of vehicles and attract attention. At present, matrix headlights use a buck-boost structure to power LEDs, and control the LED on and off through matrix chips; considering that the lighting effect can be updated, communication is generally used to control the lamps; in order to reduce overall power consumption, some OEMs require static current management, use a single-chip microcomputer to collect wake-up signals, and then the single-chip microcomputer controls the SBC chip to wake up, complete communication control and start normal operation.

[0003] Existing static current management and power input protection technology: when the wake-up signal of the body KL15 is detected, TVS and diodes are added to the power input end for high voltage input and anti-reverse protection, and then the switch is controlled to power the SBC and the single-chip microcomputer; the single-chip microcomputer collects whether there is a message signal input from the body end KL15, and then wakes up the SBC to achieve communication and start normal work. This control method has many circuit components and poor integration.

[0004] The above problems need to be solved urgently. Utility Model Content

[0005] The utility model aims to provide a matrix lamp whose power input is controlled by an ideal diode.

[0006] In order to solve the above technical problems, the utility model provides a matrix lamp whose power input is controlled by an ideal diode, comprising:

[0007] Wake-up module, ideal diode power supply control module, SBC module, main control module and LED module;

[0008] The ideal diode power supply control module is electrically connected to the SBC module and the LED module respectively;

[0009] The SBC module is electrically connected to the main control module;

[0010] The wake-up module is electrically connected to the SBC module and the main control module respectively, and;

[0011] The wake-up module is adapted to wake up the SBC module and then work after receiving the wake-up signal, the SBC module supplies power to the main control module, and after the main control module is powered, the wake-up module sends the wake-up signal to the main control module;

[0012] The main control module is electrically connected to the LED module, and is suitable for controlling the operation of the LED module after receiving a wake-up signal. The main control module is communicatively connected to the ideal diode power supply control module, and is suitable for controlling the ideal diode power supply control module to supply power to the LED module.

[0013] Further, the wake-up module includes a first wake-up unit, a second wake-up unit and a wake-up signal receiving end;

[0014] The first wake-up unit is electrically connected to the SBC module;

[0015] The second wake-up unit is electrically connected to the main control module;

[0016] The wake-up signal receiving end is electrically connected to the first wake-up unit and the second wake-up unit respectively.

[0017] Furthermore, the ideal diode power supply control module includes: an anti-reverse MOS tube Q1, a switch MOS tube Q2 and an ideal diode controller;

[0018] The control terminal DGATE pin of the ideal diode controller is electrically connected to the gate of the anti-reverse MOS tube Q1;

[0019] The control terminal HGATE pin of the ideal diode controller is electrically connected to the gate of the switch MOS tube Q2;

[0020] The enable terminal EN_UVLO pin of the ideal diode controller is electrically connected to the main control module;

[0021] The power input end outputs the normally-on power supply end SBC_POWER through the anti-reverse MOS tube Q1 and then outputs the controllable power supply end POWER_IN after passing through the switch MOS tube Q2;

[0022] The main control module is suitable for sending a control signal to the enable terminal EN_UVLO of the ideal diode controller, so as to control the on-off of the switch MOS tube Q2, and further control the on-off of the controllable power supply terminal POWER_IN.

[0023] Furthermore, the LED module includes an LDO module, an LED module and an LED matrix control module;

[0024] The ideal diode power supply control module supplies power to the LDO module, the LED module and the LED matrix control module respectively;

[0025] The LDO module is electrically connected to the LED matrix control module and is suitable for supplying power to the LED matrix control module.

[0026] Furthermore, the matrix lamp whose power input is controlled by an ideal diode also includes a high-side output control module, a BOOST step-up module and a BUCK step-down module;

[0027] The controllable power supply terminal POWER_IN of the ideal diode power supply control module is electrically connected to the high-side output control module and the BOOST boost module respectively;

[0028] The BOOST voltage-boosting module and the BUCK voltage-bucking module are electrically connected to the LED module and the LED matrix control module respectively;

[0029] The high-side output module is electrically connected to the LDO module.

[0030] Furthermore, the ideal diode power supply control module further includes a filtering unit;

[0031] The voltage outputted from the controllable power supply terminal POWER_IN of the ideal diode power supply control module is filtered by a filtering unit and then supplied to the high-side output control module and the BOOST boost module respectively.

[0032] Furthermore, the wake-up module, the ideal diode power supply control module, the SBC module, and the main control module are arranged on a driving PCB board;

[0033] The LED module is arranged on a light board PCB;

[0034] The driving PCB board and the light board PCB board are separately arranged.

[0035] Furthermore, the driving PCB board and the light board PCB board are respectively provided with a first CAN transceiver and a second CAN transceiver;

[0036] The main control module is communicatively connected with the first CAN transceiver;

[0037] The LED matrix control module is communicatively connected with the second CAN transceiver;

[0038] The first CAN transceiver is communicatively connected with the second CAN transceiver.

[0039] Furthermore, the LDO module is electrically connected to the second CAN transceiver and is suitable for supplying power to the second CAN transceiver.

[0040] Furthermore, the MCU microcontroller memory partition of the main control module is set.

[0041] The beneficial effect of the utility model is that the power input provided by the utility model is controlled by an ideal diode. The power input is controlled by an ideal diode power supply control module, and the control power supplies power to the SBC module. The SBC module directly receives the wake-up signal to realize power management. At this time, the main control module does not need to be powered on first. Compared with the previous technology, the static current is smaller, reducing the overall consumption of the system; and the ideal diode power supply control module can realize overvoltage protection and power reverse connection protection, and has high integration. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0043] Figure 1 This is a principle block diagram of a matrix lamp controlled by an ideal diode provided in an embodiment of the utility model.

[0044] Figure 2 It is a circuit diagram of the wake-up module provided in an embodiment of the utility model.

[0045] Figure 3 It is a circuit diagram of an ideal diode power supply control module provided in an embodiment of the utility model.

[0046] Figure 4 It is a circuit diagram of the SBC module provided by the embodiment of the utility model.

[0047] Figure 5 It is a circuit diagram of a high-side output control module provided in an embodiment of the utility model.

[0048] Figure 6 It is a circuit diagram of the BOOST boost module provided in the embodiment of the utility model.

[0049] Figure 7 It is a circuit diagram of the BUCK step-down module provided in the embodiment of the utility model.

[0050] Figure 8 It is a circuit diagram of the LED matrix control module provided by the embodiment of the utility model.

[0051] Fig. 9 It is a circuit diagram of the first CAN transceiver provided by an embodiment of the utility model. DETAILED DESCRIPTION

[0052] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0053] Example

[0054] See also Figure 1 The present embodiment provides a matrix lamp whose power input is controlled by an ideal diode, comprising: a wake-up module, an ideal diode power supply control module, an SBC module, a main control module and an LED module; the ideal diode power supply control module is electrically connected to the SBC module and the LED module respectively; the SBC module is electrically connected to the main control module; the wake-up module is electrically connected to the SBC module and the main control module respectively, and; the wake-up module is suitable for waking up the SBC module and working after receiving a wake-up signal, the SBC module supplies power to the main control module, and after the main control module is powered, the wake-up module sends a wake-up signal to the main control module; the main control module is electrically connected to the LED module, and the main control module is suitable for controlling the LED module to work after receiving the wake-up signal, the main control module is communicatively connected to the ideal diode power supply control module, and is suitable for controlling the ideal diode power supply control module to supply power to the LED module. The power input is controlled by an ideal diode power supply control module, which controls the power supply to the SBC module. The SBC module directly receives the wake-up signal to implement power management. At this time, the main control module does not need to be powered on first. Compared with previous technologies, the static current is smaller, reducing the overall consumption of the system. In addition, the ideal diode power supply control module can implement overvoltage protection and power reverse connection protection, with high integration.

[0055] See also Figure 2 In this embodiment, the wake-up module includes a first wake-up unit, a second wake-up unit and a wake-up signal receiving end; the first wake-up unit is electrically connected to the SBC module; the second wake-up unit is electrically connected to the main control module; the wake-up signal receiving end is electrically connected to the first wake-up unit and the second wake-up unit respectively. Specifically, the first wake-up unit and the second wake-up unit are both provided with anti-reverse diodes and voltage-dividing resistors. The vehicle body KL15 input signal is sent to the SBC module and the main control module after TVS protection, anti-reverse current limiting and voltage division.

[0056] See also Figure 3The ideal diode power supply control module includes: an anti-reverse MOS tube Q1, a switch MOS tube Q2 and an ideal diode controller; the control end DGATE pin of the ideal diode controller is electrically connected to the gate of the anti-reverse MOS tube Q1; the control end HGATE pin of the ideal diode controller is electrically connected to the gate of the switch MOS tube Q2; the enable end EN_UVLO pin of the ideal diode controller is electrically connected to the main control module; the power input end outputs the normally-on power supply end SBC_POWER through the anti-reverse MOS tube Q1 and then outputs the controllable power supply end POWER_IN after passing through the switch MOS tube Q2; the main control module is suitable for sending a control signal to the enable end EN_UVLO of the ideal diode controller, thereby controlling the on and off of the switch MOS tube Q2, and further controlling the on and off of the controllable power supply end POWER_IN.

[0057] It should be noted that the ideal diode controller can drive two external MOS tube switches. The first switch is mainly used for anti-reverse function, and the second MOS tube acts as a switch. The ideal diode controller controls the two MOS tubes to realize the opening and closing of the power path, realize power management, and prevent reverse connection and overvoltage protection, with higher integration. The ideal diode controller can use chips such as LM7480, and other chips with the same function are also applicable.

[0058] See also Figure 4 The SBC module implements CAN communication processing, supports sleep and wake-up, and realizes static current management. The chip can output stable V1 to power the main control module.

[0059] In this embodiment, the LED module includes an LDO module, an LED module and an LED matrix control module; the ideal diode power supply control module supplies power to the LDO module, the LED module and the LED matrix control module respectively; the LDO module is electrically connected to the LED matrix control module and is suitable for supplying power to the LED matrix control module.

[0060] In this embodiment, the matrix lamp whose power input is controlled by an ideal diode also includes a high-side output control module, a BOOST boost module and a BUCK buck module; the controllable power supply end POWER_IN of the ideal diode power supply control module is electrically connected to the high-side output control module and the BOOST boost module, respectively; after the BOOST boost module is electrically connected to the BUCK buck module, it is electrically connected to the LED module and the LED matrix control module, respectively; the high-side output module is electrically connected to the LDO module.

[0061] Among them, the circuit diagram of the high-side output control module is as follows Figure 5As shown in the figure, the chip model is TPS2HB35B. The circuit diagram of the BOOST boost module is as follows Figure 6 As shown, the circuit diagram of the BUCK step-down module is as follows Figure 7 shown.

[0062] The matrix lighting effect control of the LED module is realized by the LED matrix control module, which has a high operating frequency and uses the BOOST boost + BUCK buck structure control. The front-end capacitor of the matrix control chip is small, which can reduce the impact on the power supply end of the matrix control chip and prevent the chip from being damaged. The BOOST boost chip can be TPS92682, and the BUCK buck chip can be TPS92520. Other functional chips are also applicable. Both chips have single-chip microcomputers controlled by SPI.

[0063] The circuit diagram of the LED matrix control module is as follows Figure 8 As shown, the matrix chip can meet the needs of high-current and high-brightness LED control. The chip control method is simple and easy to implement. The LED is turned on and off by controlling the internal switch of the chip, thereby realizing the lighting effect control. Chips such as TPS92662A can be selected. The chip control method can adopt time-sharing multiplexing to increase the number of channel-driven LEDs.

[0064] In this embodiment, the ideal diode power supply control module also includes a filtering unit; the voltage output by the controllable power supply terminal POWER_IN of the ideal diode power supply control module is filtered by the filtering unit and then supplied to the high-side output control module and the BOOST boost module respectively.

[0065] In this embodiment, the wake-up module, the ideal diode power supply control module, the SBC module, and the main control module are arranged on the driver PCB board; the LED module is arranged on the light board PCB board; the driver PCB board and the light board PCB board are arranged separately. The PCB board is arranged separately to solve the problem of limited area of ​​the light board PCB board.

[0066] The driver PCB and the light board PCB are respectively provided with a first CAN transceiver and a second CAN transceiver; the main control module is connected to the first CAN transceiver for communication; the LED matrix control module is connected to the second CAN transceiver for communication; the first CAN transceiver is connected to the second CAN transceiver for communication. By respectively providing CAN transceivers on the driver PCB and the light board PCB, EMI electromagnetic interference resistance is improved.

[0067] The circuit diagram of the first CAN transceiver is as follows Fig. 9 shown.

[0068] The LDO module is electrically connected to the second CAN transceiver and is suitable for supplying power to the second CAN transceiver.

[0069] In this embodiment, the MCU single-chip memory of the main control module is partitioned. When the software program of the main control module is upgraded, the LED module can light up normally, and the reliability is higher.

[0070] In summary, the utility model provides a matrix light whose power input is controlled by an ideal diode. The power input is controlled by an ideal diode power supply control module. The control power supplies power to the SBC module, and the SBC module directly receives the wake-up signal to realize power management. At this time, the main control module does not need to be powered on first. Compared with the previous technology, the static current is smaller, reducing the overall consumption of the system; and the ideal diode power supply control module can realize overvoltage protection and power reverse connection protection, and has high integration.

[0071] All devices (parts without specific structure) selected in this application are universal standard parts or parts known to those skilled in the art, and their structures and principles can be known by those skilled in the art through technical manuals or conventional experimental methods. In addition, the software programs involved in this application are all prior art, and this application does not involve any improvement to the software programs.

[0072] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0073] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0074] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, and the indirect coupling or communication connection of devices or units can be electrical, mechanical or other forms.

[0075] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0076] In addition, each functional unit in each embodiment of the present utility model may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0077] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A matrix lamp whose power input is controlled by an ideal diode, characterized in that: include: Wake-up module, ideal diode power supply control module, SBC module, main control module and LED module; The ideal diode power supply control module is electrically connected to the SBC module and the LED module respectively; The SBC module is electrically connected to the main control module; The wake-up module is electrically connected to the SBC module and the main control module respectively, and; The wake-up module is adapted to wake up the SBC module and then work after receiving the wake-up signal, the SBC module supplies power to the main control module, and after the main control module is powered, the wake-up module sends the wake-up signal to the main control module; The main control module is electrically connected to the LED module, and is suitable for controlling the operation of the LED module after receiving a wake-up signal; the main control module is communicatively connected to the ideal diode power supply control module, and is suitable for controlling the ideal diode power supply control module to supply power to the LED module.

2. The matrix lamp controlled by an ideal diode according to claim 1, characterized in that: The wake-up module includes a first wake-up unit, a second wake-up unit and a wake-up signal receiving end; The first wake-up unit is electrically connected to the SBC module; The second wake-up unit is electrically connected to the main control module; The wake-up signal receiving end is electrically connected to the first wake-up unit and the second wake-up unit respectively.

3. The matrix lamp controlled by an ideal diode according to claim 1, characterized in that: The ideal diode power supply control module includes: an anti-reverse MOS tube Q1, a switch MOS tube Q2 and an ideal diode controller; The control terminal DGATE pin of the ideal diode controller is electrically connected to the gate of the anti-reverse MOS tube Q1; The control terminal HGATE pin of the ideal diode controller is electrically connected to the gate of the switch MOS tube Q2; The enable terminal EN_UVLO pin of the ideal diode controller is electrically connected to the main control module; The power input end outputs the normally-on power supply end SBC_POWER through the anti-reverse MOS tube Q1 and then outputs the controllable power supply end POWER_IN after passing through the switch MOS tube Q2; The main control module is suitable for sending a control signal to the enable terminal EN_UVLO of the ideal diode controller, so as to control the on-off of the switch MOS tube Q2, and further control the on-off of the controllable power supply terminal POWER_IN.

4. The matrix lamp controlled by an ideal diode at power input as claimed in claim 3, characterized in that: The LED module includes an LDO module, an LED module and an LED matrix control module; The ideal diode power supply control module supplies power to the LDO module, the LED module and the LED matrix control module respectively; The LDO module is electrically connected to the LED matrix control module and is suitable for supplying power to the LED matrix control module.

5. The matrix lamp controlled by an ideal diode at the power input as claimed in claim 4, characterized in that: The matrix lamp whose power input is controlled by an ideal diode also includes a high-side output control module, a BOOST step-up module and a BUCK step-down module; The controllable power supply terminal POWER_IN of the ideal diode power supply control module is electrically connected to the high-side output control module and the BOOST boost module respectively; The BOOST voltage-boosting module and the BUCK voltage-bucking module are electrically connected to the LED module and the LED matrix control module respectively; The high-side output module is electrically connected to the LDO module.

6. The matrix lamp controlled by an ideal diode at power input as claimed in claim 5, characterized in that: The ideal diode power supply control module also includes a filtering unit; The voltage outputted from the controllable power supply terminal POWER_IN of the ideal diode power supply control module is filtered by a filtering unit and then supplied to the high-side output control module and the BOOST boost module respectively.

7. The matrix lamp controlled by an ideal diode at power input as claimed in claim 4, characterized in that: The wake-up module, the ideal diode power supply control module, the SBC module, and the main control module are arranged on a driving PCB board; The LED module is arranged on a light board PCB; The driving PCB board and the light board PCB board are separately arranged.

8. The matrix lamp controlled by an ideal diode at the power input as claimed in claim 7, characterized in that: The driving PCB board and the light board PCB board are respectively provided with a first CAN transceiver and a second CAN transceiver; The main control module is communicatively connected with the first CAN transceiver; The LED matrix control module is communicatively connected with the second CAN transceiver; The first CAN transceiver is communicatively connected with the second CAN transceiver.

9. The matrix lamp controlled by an ideal diode at the power input as claimed in claim 8, characterized in that: The LDO module is electrically connected to the second CAN transceiver and is suitable for supplying power to the second CAN transceiver.

10. The matrix lamp controlled by an ideal diode at power input as claimed in claim 1, characterized in that: The MCU single-chip memory partition setting of the main control module.

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