System and method capable of automatically detecting input voltage and adjusting output mode

Abstract

The invention relates to a system and method capable of automatically detecting an input voltage and adjusting an output mode, and the system comprises a power supply standby board and a power supply mainboard, and comprises a DC power supply, a fuse, a detection resistor, a voltage sensor, a controller, a dual-mode switch, a BUCK module, and a temperature sensor. Accurate monitoring of the input voltage and selection of multiple output modes are realized. Specifically, the controller controls the states of the dual-mode switch and the BUCK module according to input voltage and temperature information, so that 12V or 16V-28V voltage output is realized, and the working state is displayed through the indication module. In addition, the method further comprises the steps of obtaining the input voltage, the input current and the temperature, judging the working state of the power supply standby board, selecting a proper output mode, monitoring the operation condition of the system in real time, and ensuring the stability and the safety of the system. According to the invention, the effects of improving the energy utilization efficiency and meeting the power supply demand of the PLCe are achieved.

Description

Technical Field

[0001] This application relates to the technical field of power electronics, and in particular, to a system and method capable of automatically detecting input voltage and adjusting output mode. Background Art

[0002] PCIe (Peripheral Component Interconnect Express), as a high-speed serial computer expansion bus standard, occupies an important position in the field of computer communication. With its high-speed data transmission ability, it provides a solid guarantee for the efficient operation of various high-performance hardware devices.

[0003] Taking the 4090 graphics card as an example, as a currently powerful graphics processing hardware, it has relatively high requirements for power supply. When PCIe is applied to the 4090 graphics card, it usually requires 450W of power to maintain its stable and efficient working state. However, there are certain limitations in the power supply design of existing motherboards. The power supply modules equipped on most motherboards cannot directly provide such high power and are difficult to meet the power requirements of the 4090 graphics card.

[0004] To solve this problem, the currently common practices are either to use an external power supply to provide the required power for the graphics card additionally, but this will increase the complexity of hardware connection and may also bring potential stability hazards; or to replace the power supply with a higher power to overall improve the power supply capacity of the system, but this will undoubtedly increase the user's hardware cost investment. Summary of the Invention

[0005] In order to more energy-efficiently meet the power supply requirements for PCIe, this application provides a system and method capable of automatically detecting input voltage and adjusting output mode.

[0006] On the one hand, a system and method capable of automatically detecting input voltage and adjusting output mode provided by this application adopt the following technical solutions: A system capable of automatically detecting input voltage and adjusting output mode includes a power supply motherboard and a power supply backup board, and the output ends of the power supply motherboard and the power supply backup board are both electrically connected to the power supply end of PLCe; The backup power supply board includes a DC power supply, a controller, a dual-mode switch and a BUCK module electrically connected to the controller; the input ends of the dual-mode switch and the BUCK module are electrically connected to the output end of the DC power supply, and both the dual-mode switch and the BUCK module are controllably connected to the controller, and the output ends of the dual-mode switch and the BUCK module are electrically connected to the power supply end of the PLCe through a Power Conn module; the backup power supply board further includes a BP Conn 1 module electrically connected to the controller, the main power supply board includes a BP Conn 2 module, the BP Conn 1 module and the BP Conn 2 module are signal-connected, the BP Conn 2 module is used to output an MG-PG signal to the BP Conn 1 module, and the BP Conn 1 module feeds it back to the controller after receiving the MG-PG signal.

[0007] By adopting the above technical solution, by monitoring the state of the main power supply board, it is possible to judge whether the main power supply board is in the working state or the off state according to the MG-PG signal, and further ensure that the backup power supply board is timely turned off when the main power supply board is working, avoiding unnecessary energy waste and achieving the purpose of energy saving. Moreover, when the controller MCU judges that the backup power supply board is in the on state, it can control the dual-mode switch to open or the BUCK module to open, and can make the backup power supply board output an appropriate voltage that can meet the power supply requirements of the PLCe according to the needs.

[0008] Preferably, the voltage output end of the dual-mode switch is electrically connected to pin 1 of the BP Conn 1 module for receiving voltage, and pin 4 of the BP Conn 1 module is electrically connected to pin 4 of the BP Conn 2 module for transmitting voltage.

[0009] By adopting the above technical solution, the voltage transmission between the backup power supply board and the main power supply board is more stable and reliable. Specifically, the voltage output end of the dual-mode switch is electrically connected to pin 1 of the BP Conn 1 module, ensuring that the backup power supply board can accurately transmit the voltage to the BP Conn 1 module when needed. Pin 4 of the BP Conn 1 module is connected to pin 4 of the BP Conn 2 module, realizing the voltage transmission path from the backup power supply board to the main power supply board, and ensuring that the main power supply board can receive a stable voltage signal in a timely manner under different working modes.

[0010] Preferably, the signal output terminal of the controller MCU is electrically connected to pin 3 of the BP Conn 1 module, and pin 7 of the BP Conn 1 module is electrically connected to pin 6 of the BP Conn 2 module. The controller MCU is used to transmit the MCU_Switch signal to the BP Conn 1 module, and after receiving the MCU_Switch signal, the BP Conn 1 module outputs it to the power supply main board.

[0011] By adopting the above technical solution, the signal transmission function between the controller MCU and the BP Conn 1 module is realized. Specifically, the controller MCU can send the MCU_Switch signal through pin 3 of the BP Conn 1 module. After being processed by the BP Conn 1 module, this signal is transmitted to the power supply main board through pin 6 of the BP Conn 2 module. This design ensures that the controller MCU can effectively control the state of the power supply main board, thereby achieving precise voltage management and switching under different working conditions, and improving the stability and reliability of the system.

[0012] Preferably, pin 5 of the BP Conn 2 module is electrically connected to pin 6 of the BP Conn 1 module for transmitting the MCU_Logic signal. Pin 4 of the BP Conn 2 module is electrically connected to pin 5 of the BP Conn 1 module, and pin 2 of the BP Conn 1 module is electrically connected to the signal input terminal of the controller MCU. The power supply main board can transmit the MB-PG signal to the BP Conn 1 module, and after receiving the MB-PG signal, the BP Conn 1 module outputs it to the controller MCU.

[0013] By adopting the above technical solution, it is possible to efficiently transmit control signals between the power supply main board and the power supply backup board. Specifically, the connection between pin 5 of the BP Conn 2 module and pin 6 of the BP Conn 1 module ensures the effective transmission of the MCU_Logic signal, enabling the controller MCU to monitor and control the state of the power supply main board in real time. The connection between pin 4 of the BP Conn 2 module and pin 5 of the BP Conn 1 module, as well as the connection between pin 2 of the BP Conn 1 module and the signal input terminal of the controller MCU, realizes a closed-loop feedback mechanism for the MB-PG signal. This not only improves the response speed of the system but also enhances the reliability of the system, enabling the controller MCU to be notified in a timely manner when the state of the power supply main board changes, and thus making corresponding adjustment measures.

[0014] Preferably, a fuse is further included. The output terminal of the DC power supply DC is electrically connected to one end of the fuse, and the other end of the fuse is electrically connected to the input terminal of the dual-mode switch and the input terminal of the BUCK module.

[0015] By adopting the above technical solution, the fuse plays a role in overcurrent protection, avoiding damage to key components in the system due to excessive current, and improving the safety and reliability of the system.

[0016] On the other hand, a method for automatically detecting the input voltage and adjusting the output mode provided by the present application adopts the following technical solution: A method for automatically detecting the input voltage and adjusting the output mode, based on a system for automatically detecting the input voltage and adjusting the output mode, includes the following steps: Obtain the input state of the power supply backup board; According to the input state, determine whether the power supply backup board is turned on. If the power supply backup board is turned on, control the dual-mode switch or the BUCK module to turn on, so that the power supply backup board can output voltage to achieve output turn-on. If the power supply backup board is turned off, obtain the level of the MB-PG signal output by the main power supply board; When the MB-PG signal is at a high level, control the main power supply board to turn off, and continue to obtain the working state of the power supply backup board. When the MB-PG signal is at a low level, control the power supply backup board to output voltage and select an output mode.

[0017] By adopting the above technical solution, the system can automatically adjust the power supply state according to different situations, realizing the automatic operation of the system, improving the flexibility and adaptability of the system, enabling the system to automatically adjust its own power supply output mode according to the state of the power supply backup board and the signal of the main power supply board, and improving the power supply stability and reliability of the system.

[0018] Preferably, the power supply backup board includes a detection resistor, a voltage sensor, and a temperature sensor electrically connected to the controller. The detection resistor and the voltage sensor are both electrically connected to the DC power supply. The detection resistor is used to detect the input current, the voltage sensor is used to detect the input voltage, the temperature sensor is used to detect the temperature of the power supply backup board, and the controller determines whether the power supply backup board is turned on according to the input current, input voltage, and the temperature.

[0019] By adopting the above technical solution, a detection resistor, a voltage sensor and a temperature sensor connected to the controller are added to the power supply backup board, which are respectively used to detect the input current, the input voltage and the temperature of the power supply backup board. The controller determines whether the power supply backup board is turned on according to this information, making the controller's judgment on the state of the power supply backup board more accurate and comprehensive. Through the monitoring of multiple physical quantities, the intelligence level of the system is improved, enabling the system to determine whether the power supply backup board is in a normal working state based on richer information, and avoiding affecting the system performance due to inaccurate judgment of a single factor.

[0020] Preferably, the output modes include a first output mode, a second output mode and an others output mode. Among them, in the first output mode, the controller MCU drives the dual-mode switch to open and the BUCK module to close; in the second output mode, the controller MCU drives the dual-mode switch to close and the BUCK module to open; in the others output mode, it returns to obtain the input state of the power supply backup board.

[0021] By adopting the above technical solution, the output modes are defined, including the first output mode, the second output mode and the others output mode, and the driving control methods of the controller MCU for the dual-mode switch and the BUCK module in different modes are clarified, enabling the system to have a clear output mode selection in different situations, further refining the output adjustment method of the system, providing multiple options for the output adjustment of the system, selecting different output modes according to different situations, improving the adaptability of the system, and ensuring that the system can adjust the output specifically under different working conditions to meet different application requirements.

[0022] Preferably, it also includes detecting the input state of the power supply backup board. If the detection result is normal, continue to obtain the input state of the power supply backup board; if the detection result is abnormal, turn off the voltage output of the power supply backup board.

[0023] By adopting the above technical solution, subsequent operations are determined according to the detection result. If it is normal, continue to obtain the input state; if it is abnormal, turn off the voltage output of the power supply backup board, realizing continuous monitoring and abnormal handling of the input state of the power supply backup board, and ensuring the stability and safety of the system.

[0024] In summary, the present application includes at least one of the following beneficial technical effects: 1. By automatically detecting the input voltage and adjusting the output mode, the intelligent switching of the power supply mode under different load conditions is realized, improving the flexibility and adaptability of power management; 2. When the main power supply board is turned on, the backup board can be turned off in time, avoiding unnecessary power consumption and thus reducing the overall energy consumption. Description of the Drawings

[0025] Figure 1 is the principle block diagram of Embodiment 1 of the present application; Figure 2 is the step flowchart of Embodiment 2 of the present application; Figure 3 is the overall flowchart of Embodiment 2 of the present application. Detailed implementation manners

[0026] The following further elaborates on the present application in conjunction with the attached Figures 1-3 drawings.

[0027] Embodiment 1 of the present application discloses a system that can automatically detect the input voltage and adjust the output mode.

[0028] Referring to Figure 1 , a system and method for automatically detecting the input voltage and adjusting the output mode includes a power supply backup board and a power supply main board that are electrically connected. Both the power supply backup board and the power supply main board can be used to supply power to PCIe. Among them, the output power of the power supply main board is relatively low and cannot meet the power usage requirements of PCIe; while the output power of the power supply backup board is relatively high and can meet the power usage requirements of PCIe. By controlling the power supply backup board, the output mode can be automatically adjusted according to actual needs, improving the energy utilization efficiency and system stability.

[0029] The power supply backup board includes a DC power supply DC, a fuse FUSE, a detection resistor SenseR, a voltage sensor Vsensor, a controller MCU, a LOGIC P BUCK module, a Logic module, a dual-mode switch, a BUCK module, etc. The output end of the power supply DC is electrically connected to one end of the fuse FUSE. The other end of the fuse is electrically connected to the input end of the detection resistor SenseR and is also electrically connected to the first input end of the LOGIC P BUCK module through a diode. By setting the fuse FUSE, it can ensure that the circuit can be cut off in time when the current is overloaded.

[0030] The power supply of the power supply main board MB-DC is electrically connected to the second input end of the LOGIC P BUCK module through a diode. And the output end of the LOGIC P BUCK module is electrically connected to the power supply end of the voltage sensor Vsensor and the power supply end of the controller MCU respectively to ensure the normal operation of the voltage sensor Vsensor and the controller MCU. And even in the case of a power failure of one power supply, the other power supply can continue to supply power to key components, increasing the reliability of the system.

[0031] One end of the fuse FUSE away from the power supply DC is also electrically connected to the first input terminal of the voltage sensor Vsensor, and the output terminal of the detection resistor SenseR is electrically connected to the second input terminal of the voltage sensor Vsensor, so as to realize the detection of the input current and input voltage of the power supply backup board.

[0032] The output terminal of the controller MCU is electrically connected to the input terminal of the Logic module, and the first output terminal of the Logic module is electrically connected to the enable terminal of the dual-mode switch. One end of the detection resistor SenseR away from the fuse FUSE is electrically connected to the input terminal of the dual-mode switch and is also electrically connected to the input terminal of the BUCK module. The second output terminal of the Logic module is electrically connected to the enable terminal of the BUCK module. Moreover, the input terminals of the dual-mode switch and the BUCK module are both electrically connected to the Power Conn module of the PLCe through the Power Conn module of the power supply backup board. The controller MCU is responsible for the logical control of the entire system. By sending signals to the Logic module, the controller MCU then controls the opening or closing of the dual-mode switch and the BUCK module through the Logic module. In this embodiment, when the controller MCU controls the dual-mode switch to close and the BUCK module to open through the Logic module, the output voltage of the power supply backup board is 16 - 28V at this time; conversely, when the dual-mode switch is controlled to open and the BUCK module is closed, the output voltage of the power supply backup board is 12V.

[0033] The power supply backup board further includes a BP Conn 1 module, and the power supply main board includes a BP Conn 2 module. The voltage output terminal of the dual-mode switch is electrically connected to pin 1 of the BP Conn 1 module for receiving voltage. Pin 4 of the BP Conn 1 module is electrically connected to pin 4 of the BPConn 2 module for transmitting voltage. The signal output terminal of the controller MCU is electrically connected to pin 3 of the BP Conn 1 module, and pin 7 of the BP Conn 1 module is electrically connected to pin 6 of the BP Conn 2 module. The controller MCU is used to transmit the MCU_Switch signal to the BP Conn 1 module, and after receiving the MCU_Switch signal, the BP Conn 1 module outputs it to the power supply main board. Pin 5 of the BP Conn 2 module is electrically connected to pin 6 of the BP Conn 1 module for transmitting the MCU_Logic signal. Pin 4 of the BP Conn 2 module is electrically connected to pin 5 of the BP Conn 1 module, and pin 2 of the BP Conn 1 module is electrically connected to the signal input terminal of the controller MCU. The power supply main board can transmit the MB-PG signal to the BP Conn 1 module, and after receiving the MB-PG signal, the BP Conn 1 module outputs it to the controller MCU.

[0034] The power supply main board further includes a first PMOS transistor, a second PMOS transistor, and a switch. The first output terminal of the Power Conn module of the power supply main board is electrically connected to the input terminal of the first PMOS transistor, and the output terminal of the first PMOS transistor is set as the first voltage output terminal of the power supply main board. The second output terminal of the Power Conn module of the power supply main board is electrically connected to the input terminal of the switch, and the output terminal of the switch is set as the second voltage output terminal of the power supply main board. The pin 2 of the BP Conn 2 module is electrically connected to the enable terminals of the first PMOS transistor and the second PMOS transistor, the pin 1 of the BP Conn 2 module is electrically connected to the input terminal of the second PMOS transistor, and the output terminal of the second PMOS transistor is electrically connected to the output terminal of the first PMOS transistor. Moreover, both the first voltage output terminal and the second voltage output terminal of the power supply main board are electrically connected to the power supply terminal of the PLCe.

[0035] Embodiment 2 of the present application discloses a system method that can automatically detect the input voltage and adjust the output mode.

[0036] Reference Figure 1 、 Figure 2 and Figure 3 , a system method that can automatically detect the input voltage and adjust the output mode includes the following steps: S1: Obtain the input status of the backup power supply board. By setting a detection resistor SenseR and a voltage sensor Vsensor, the acquisition of the input voltage and input current can be realized, and by setting a temperature sensor electrically connected to the controller MCU on the backup power supply board, the detection of the temperature of the backup power supply board is realized.

[0037] S2: According to the input status, determine whether the backup power supply board is turned on. The controller MCU determines whether the backup power supply board is turned on according to the acquired input voltage, input current, and temperature data. If the controller MCU determines that the backup power supply board is in the on state, the controller MCU controls the dual-mode switch or the BUCK module to turn on, so that the backup power supply board can output voltage to realize output turn-on, and then the backup power supply board can directly supply power to the PLCe. If the controller MCU determines that the backup power supply board is in the off state, jump to step S3.

[0038] S3: Read the level of the MB-PG signal output by the power supply main board. When the MB-PG signal is at a high level, the power supply main board is in the working state at this time, and the controller MCU controls the power supply main board to turn off, and at the same time returns to step S1; when the MB-PG signal is at a low level, the power supply main board is in the off state at this time, and jumps to step S4. This process ensures that the power supply main board and the backup power supply board do not work simultaneously, avoiding resource waste and potential safety hazards.

[0039] S4: The controller MCU controls the backup power supply board to output voltage and select the output mode.

[0040] The output module includes three types, namely the first output module, the second output module, and the others output module. In the embodiments of the present application, when the power supply standby board realizes the first output mode, the controller MCU drives the dual-mode switch to open, the BUCK module is closed, and the output voltage of the standby board is controlled to be 12V, and then it jumps to step S5. When the power supply standby board realizes the second output mode, the controller MCU drives the dual-mode switch to close, the BUCK module is opened, and the output voltage of the standby board is controlled to be 16V - 28V, and then it jumps to step S5; when the power supply standby board realizes the others output module, it returns to step S1. In this way, the system can flexibly select the appropriate output mode according to different load requirements to maximize the energy efficiency ratio.

[0041] S5: Detect the input state of the power supply standby board. If the detection result is normal, return to step 1 to enter the loop. If the detection result is abnormal, turn off the voltage output of the power supply backplane.

[0042] The implementation principle of a system and method for automatically detecting the input voltage and adjusting the output mode in the embodiments of the present application is as follows: During use, the main board cannot be powered before the standby board. Therefore, it is necessary to detect the power supply state of the main board through the MCU of the standby board. If the main board has been powered, the power supply of the standby board is turned off, and at the same time, a control signal is output through the MCU to make the main board stop power supply; if the main board is not powered, the standby board power supply is run, and when the high-power constant voltage requirement is achieved through the standby board power supply, the mode is automatically switched to reduce power loss; when the wide voltage input range is reached, it is switched to the conventional power step-down output.

[0043] The above are all the preferred embodiments of the present application. The protection scope of the present application is not limited hereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A system capable of automatically detecting the input voltage and adjusting the output mode, characterized in that: It includes a power supply main board and a power supply backup board, and the output ends of the power supply main board and the power supply backup board are electrically connected to the power supply end of the PLCe; The power supply backup board includes a DC power supply, a controller, a dual-mode switch and a BUCK module electrically connected to the controller; the input ends of the dual-mode switch and the BUCK module are electrically connected to the output end of the DC power supply, and both the dual-mode switch and the BUCK module are controlled and connected to the controller, and the output ends of the dual-mode switch and the BUCK module are electrically connected to the power supply end of the PLCe through a Power Conn module; the power supply backup board also includes a BP Conn 1 module electrically connected to the controller, the power supply main board includes a BP Conn 2 module, the BP Conn 1 module and the BP Conn 2 module are signal-connected, the BP Conn 2 module is used to output an MG-PG signal to the BP Conn 1 module, and the BP Conn 1 module feeds it back to the controller after receiving the MG-PG signal.

2. The system according to claim 1, which can automatically detect the input voltage and adjust the output mode, is characterized in that: The voltage output end of the dual-mode switch is electrically connected to pin 1 of the BP Conn 1 module for receiving voltage, and pin 4 of the BP Conn 1 module is electrically connected to pin 4 of the BP Conn 2 module for transmitting voltage.

3. The system according to claim 1, which can automatically detect the input voltage and adjust the output mode, is characterized in that: The signal output end of the controller MCU is electrically connected to pin 3 of the BP Conn 1 module, and pin 7 of the BP Conn 1 module is electrically connected to pin 6 of the BP Conn 2 module. The controller MCU is used to transmit an MCU_Switch signal to the BP Conn 1 module, and the BP Conn 1 module outputs it to the power supply main board after receiving the MCU_Switch signal.

4. A system capable of automatically detecting the input voltage and adjusting the output mode according to claim 1, characterized in that: Pin 5 of the BP Conn 2 module is electrically connected to pin 6 of the BP Conn 1 module for transmitting an MCU_Logic signal, pin 4 of the BP Conn 2 module is electrically connected to pin 5 of the BP Conn 1 module, and pin 2 of the BP Conn 1 module is electrically connected to the signal input end of the controller MCU. The power supply main board can transmit the MB-PG signal to the BP Conn 1 module, and the BP Conn 1 module outputs it to the controller MCU after receiving the MB-PG signal.

5. A system capable of automatically detecting the input voltage and adjusting the output mode according to claim 1, characterized in that: It also includes a fuse. The output end of the DC power supply DC is electrically connected to one end of the fuse, and the other end of the fuse is electrically connected to the input end of the dual-mode switch and the input end of the BUCK module.

6. A method for automatically detecting an input voltage and adjusting an output mode, based on the system for automatically detecting an input voltage and adjusting an output mode according to claims 1-5, characterized in that: It includes the following steps: Obtain the input state of the power supply backup board; According to the input state, judge whether the power supply backup board is turned on; if the power supply backup board is turned on, control the dual-mode switch or the BUCK module to turn on, so that the power supply backup board can output voltage to achieve output turn-on; if the power supply backup board is turned off, obtain the level of the MB-PG signal output by the power supply main board; When the MB-PG signal is at a high level, control the power supply main board to shut down and continue to obtain the working state of the power supply backup board; when the MB-PG signal is at a low level, control the power supply backup board to output voltage and select the output mode.

7. A method for automatically detecting an input voltage and adjusting an output mode according to claim 6, characterized in that: The power supply backup board includes a detection resistor, a voltage sensor, and a temperature sensor electrically connected to the controller; both the detection resistor and the voltage sensor are electrically connected to the DC power supply. The detection resistor is used to detect the input current, the voltage sensor is used to detect the input voltage, and the temperature sensor is used to detect the temperature of the power supply backup board. The controller determines whether the power supply backup board is turned on based on the input current, input voltage, and the temperature.

8. A method for automatically detecting an input voltage and adjusting an output mode according to claim 6, characterized in that: The output modes include a first output mode, a second output mode, and an others output mode. Among them, in the first output mode, the controller MCU drives the dual-mode switch to open and the BUCK module to close; in the second output mode, the controller MCU drives the dual-mode switch to close and the BUCK module to open; in the others output mode, return to obtaining the input state of the power supply backup board.

9. A method for automatically detecting an input voltage and adjusting an output mode according to claim 6, characterized in that: It also includes detecting the input state of the power supply backup board. If the detection result is normal, continue to obtain the input state of the power supply backup board; if the detection result is abnormal, turn off the voltage output of the power supply backup board.

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