TWI754941B - Electronic equipment and operation method thereof - Google Patents

Abstract

An electronic equipment and an operation method thereof are provided. The electronic equipment includes a power supply circuit and a first connector. The power supply circuit supplies power to the main power bus of the electronic equipment. The first connector is suitable for connecting another electronic equipment. The control circuit detects the power supply of the power supply circuit. When the power supply of the power supply circuit is normal, the control circuit couples the power supply circuit to the first connector, so that the power supply circuit supplies power to the another electronic equipment via the first connector. When the power supply of the power supply circuit is abnormal, the control circuit couples the first connector to the main power bus of the electronic equipment, so that the another electronic equipment supplies power to the main power bus of the electronic equipment via the first connector.

Description

Electronic device and method of operation

The present invention relates to an electronic device and an operating method thereof.

Multiple servers arranged in the computer room can provide services through the communication network. To ensure uninterrupted service, the power supply to these servers is one of the important technical issues. Typically, each of these servers is equipped with a dedicated power supply circuit. However, if there is a problem with the power supply circuit inside a server, the server cannot keep functioning properly.

The Power Distribution Unit (PDU) configured in the computer room can transmit power to these servers, and monitor the power consumption of these servers, such as monitoring the amount of current, power, etc. consumed by these servers. The central control room can receive the power monitoring data returned by the power distribution unit, and then execute relevant procedures according to the power monitoring data. However, if there is a problem with the power supply (such as power failure, ... etc.), the power distribution unit cannot transmit the power monitoring data to the central control room, and the monitoring effect will be lost.

Generally speaking, the Uninterruptible Power System (UPS) configured in the computer room can provide power to these servers in the event of a power outage. In any case, the power supply time of the UPS is limited. Therefore, in the event of a problem with the power supply (or power failure), the UPS can make the power distribution unit turn off the equipment that consumes a lot of power, so as to prolong the power supply time of the UPS. However, the power distribution unit is also equipped with a dedicated power supply circuit. If there is a problem with the power supply circuit inside the power distribution unit, the power distribution unit cannot maintain normal operation.

It should be noted that the content of the "prior art" paragraph is used to help understand the present invention. Some (or all) of the content (or all of the content) disclosed in the "prior art" paragraph may not be known by those of ordinary skill in the art. The content disclosed in the "Prior Art" paragraph does not mean that the content has been known to those with ordinary knowledge in the technical field before the application of the present invention.

The present invention provides an electronic device and an operating method thereof for supplying power to a main power bus of the electronic device.

In an embodiment of the present invention, the above-mentioned electronic device includes a power supply circuit and a first connector. The power supply circuit is configured to supply power to the main power bus of the electronic device. The first connector is adapted to connect to another electronic device. The control circuit is coupled to the power supply circuit and the first connector. The control circuit is configured to detect the power supply of the power supply circuit. When the power supply of the power supply circuit is normal, the control circuit couples the power supply circuit to the first connector, so that the power supply circuit further supplies power to the other electronic device through the first connector. When the power supply of the power supply circuit is abnormal, the control circuit couples the first connector to the main power bus bar of the electronic device, so that the other electronic device can supply power to the main power bus bar of the electronic device through the first connector .

In an embodiment of the present invention, the above-mentioned operation method includes: detecting the power supply of the power supply circuit of the electronic device by the control circuit of the electronic device; when the power supply of the power supply circuit is normal, supplying power to the electronic device from the power supply circuit The main power busbar, and the control circuit couples the power supply circuit to the first connector of the electronic device, so that the power supply circuit of the electronic device can supply power to another electronic device through the first connector; and when the power supply When the power supply of the circuit is abnormal, the first connector is coupled to the main power bus bar of the electronic device by the control circuit, so that another electronic device can supply power to the main power bus bar of the electronic device through the first connector.

Based on the above, the electronic device and the operating method thereof according to the embodiments of the present invention can detect the power supply of its own power supply circuit. When the power supply of its own power supply circuit is normal (the own power supply circuit can supply power to its own main power bus), the control circuit can couple the power supply circuit to the first connector (that is, its own power supply circuit Power can be supplied to other electronic devices via the first connector). When the power supply of the power supply circuit is abnormal, the control circuit can couple the first connector to the main power bus (ie other electronic devices can supply power to the main power bus via the first connector). Therefore, the main power busbar of the electronic device is supplied with power regardless of whether the own power supply circuit is abnormal or not.

In order to make the above-mentioned features and advantages of the present invention more obvious and easy to understand, the following embodiments are given and described in detail with the accompanying drawings as follows.

The term "coupled (or connected)" as used throughout this specification (including the scope of the application) may refer to any direct or indirect means of connection. For example, if it is described in the text that a first device is coupled (or connected) to a second device, it should be interpreted that the first device can be directly connected to the second device, or the first device can be connected to the second device through another device or some other device. indirectly connected to the second device by a connecting means. Terms such as "first" and "second" mentioned in the full text of the description (including the scope of the patent application) in this case are used to designate the names of elements or to distinguish different embodiments or scopes, rather than to limit the number of elements The upper or lower limit of , nor is it intended to limit the order of the elements. Also, where possible, elements/components/steps using the same reference numerals in the drawings and embodiments represent the same or similar parts. Elements/components/steps that use the same reference numerals or use the same terminology in different embodiments may refer to relative descriptions of each other.

FIG. 1 is a schematic diagram of a circuit block of an electronic device 100 according to an embodiment of the present invention. According to design requirements, the electronic device 100 may be a power distribution unit (Power Distribution Unit, PDU) or other electronic devices. The electronic device 100 includes a power supply circuit 110 , a control circuit 120 and a connector 130 . The connector 130 is adapted to connect to the connector 13 of another electronic device 10 . According to design requirements, the electronic device 10 may be a power distribution unit or other electronic devices. The connection interface between the connector 13 and the connector 130 can be set according to design requirements. For example, in some embodiments, connector 130 may be connected to connector 13 via a power cable. In other embodiments, the connector 130 may be connected to the connector 13 via a network cable, that is, the connector 13 and the connector 130 may provide a Power Over the Net (PON) function. The electronic device 10 further includes a power supply circuit 11 and a control circuit 12 . The electronic device 10 , the power supply circuit 11 , the control circuit 12 and the connector 13 can be deduced with reference to the related descriptions of the electronic device 100 , the power supply circuit 110 , the control circuit 120 and the connector 130 , and will not be repeated.

The power supply circuit 110 can supply power to the main power bus Vbus of the electronic device 100 . The stabilizing capacitor C1 coupled between the main power bus Vbus and the reference voltage GND can filter out noise. The main power bus Vbus can transmit power to a load circuit (not shown, such as a controller, a communication circuit and/or other circuits or components) of the electronic device 100 to maintain the normal operation of the electronic device 100 . The control circuit 120 is coupled to the power supply circuit 110 and the connector 130 . The control circuit 120 can detect the power supply of the power supply circuit 110 .

FIG. 2 is a schematic flowchart of an operating method of an electronic device according to an embodiment of the present invention. Please refer to FIG. 1 and FIG. 2 . In step S210 , the power supply circuit 110 may supply power to the main power bus Vbus of the electronic device 100 . In step S220 , the control circuit 120 of the electronic device 100 may detect the power supply of the power supply circuit 110 of the electronic device 100 . When the power supply of the power supply circuit 110 is normal (the determination result of step S230 is "Yes"), the control circuit 120 may proceed to step S240.

In step S240, the control circuit 120 may couple the power supply circuit 110 to the connector 130 of the electronic device 100, so that the power supply circuit 110 of the electronic device 100 can further supply power to another electronic device (eg, electronic device 100) via the connector 130 device 10). When the power supply of the power supply circuit 11 of the electronic device 10 is abnormal, the control circuit 12 can couple the connector 13 to the main power bus bar Vbus10 of the electronic device 10 . Therefore, the power supply circuit 110 of the electronic device 100 can supply power to the main power bus Vbus10 of the electronic device 10 through the connector 130 and the connector 13 to maintain the normal operation of the electronic device 10 .

Returning to step S210 after step S240, the control circuit 120 can couple the power supply circuit 110 to the main power bus Vbus so that the power supply circuit 110 can supply power to the main power bus Vbus of the electronic device 100. After step S210, it returns to steps S220 and S230. When the power supply of the power supply circuit 110 is abnormal (the determination result of step S230 is "No"), the control circuit 120 may perform step S250.

The electronic device 10 can also perform the process shown in FIG. 2 . When the power supply of the power supply circuit 11 of the electronic device 10 is normal, the control circuit 12 of the electronic device 10 can couple the power supply circuit 11 to the connector 13 of the electronic device 10 so that the power supply circuit 11 of the electronic device 10 can Further power is supplied to the electronic device 100 via the connector 13 .

In step S250 , the control circuit 120 of the electronic device 100 can couple the connector 130 to the main power bus Vbus of the electronic device 100 , so that another electronic device (eg, the electronic device 10 ) can supply power to the electronic device via the connector 130 The main power bus Vbus of the device 100 . Therefore, regardless of whether the power supply circuit 110 of the electronic device 100 is abnormal, the main power bus Vbus of the electronic device 100 is supplied with power, thereby maintaining the normal operation of the electronic device 100 .

FIG. 3 is a circuit block diagram illustrating the control circuit 120 shown in FIG. 1 according to an embodiment of the present invention. In the embodiment shown in FIG. 3 , the connector 130 is coupled to the main power bus Vbus. The control circuit 120 shown in FIG. 3 includes a diode D1. The anode of the diode D1 is coupled to the output terminal of the power supply circuit 110 . The cathode of the diode D1 is coupled to the main power bus Vbus. Based on the characteristics of the diodes, the control circuit 120 can detect the power supply of the power supply circuit 110 . When the power supply of the power supply circuit 110 is normal, the output power of the power supply circuit 110 can be transmitted to the main power bus Vbus and the connector 130 through the diode D1 . When the power supply of the power supply circuit 110 is abnormal, the electronic device 10 can supply power to the main power bus Vbus of the electronic device 100 via the connector 130 . Based on the characteristics of the diodes, the power provided by the electronic device 10 will not flow back to the power supply circuit 110 .

FIG. 4 is a circuit block diagram illustrating the control circuit 120 shown in FIG. 1 according to another embodiment of the present invention. In the embodiment shown in FIG. 4 , the control circuit 120 includes a diode D1 and a fuse F1 . For the diode D1 shown in FIG. 4 , reference may be made to the related description of the diode D1 shown in FIG. 3 , and thus will not be repeated here. The first end and the second end of the fuse F1 shown in FIG. 4 are respectively coupled to the main power bus Vbus and the connector 130 . Fuse F1 can provide overcurrent protection.

FIG. 5 is a circuit block diagram illustrating the control circuit 120 shown in FIG. 1 according to still another embodiment of the present invention. In the embodiment shown in FIG. 5 , the control circuit 120 includes a diode D1 , a diode D2 , a switch SW1 and a detection circuit 121 . For the diode D1 shown in FIG. 5 , reference may be made to the related description of the diode D1 shown in FIG. 3 , and thus will not be repeated here. The anode of the diode D2 shown in FIG. 5 and the first terminal of the switch SW1 are coupled to the connector 130 . The cathode of the diode D2 and the second terminal of the switch SW1 are coupled to the main power bus Vbus. The detection circuit 121 is coupled to the power supply circuit 110 .

The detection circuit 121 can detect the power supply of the power supply circuit 110 and output the control signal Sc1 to the control terminal of the switch SW1 according to the detection result. When the power supply of the power supply circuit 110 is normal, the detection circuit 121 can turn on the switch SW1 . At this time, the output power of the power supply circuit 110 can be transmitted to the connector 130 through the diode D1 and the switch SW1. When the power supply of the power supply circuit 110 is abnormal, the detection circuit 121 can turn off the switch SW1 . At this time, the electronic device 10 can supply power to the main power bus Vbus of the electronic device 100 through the connector 130 and the diode D2.

FIG. 6 is a circuit block diagram illustrating the control circuit 120 shown in FIG. 1 according to still another embodiment of the present invention. In the embodiment shown in FIG. 6 , the control circuit 120 includes a diode D1 , a diode D2 , a switch SW1 , a fuse F1 and a detection circuit 121 . The diode D1 shown in FIG. 6 can refer to the related description of the diode D1 shown in FIG. 3 , and the diode D2, the switch SW1 and the detection circuit 121 shown in FIG. 6 can be referred to the diode D2, the switch shown in FIG. The related descriptions of SW1 and the detection circuit 121 are not repeated here. The first end of the fuse F1 shown in FIG. 6 is coupled to the main power bus bar Vbus. The second terminal of the fuse F1 is coupled to the cathode of the diode D2 and the second terminal of the switch SW1. Fuse F1 can provide overcurrent protection.

FIG. 7 is a circuit block diagram illustrating the detection circuit 121 shown in FIG. 6 according to an embodiment of the present invention. In the embodiment shown in FIG. 7 , the detection circuit 121 includes a voltage comparator CMP, a switch SW2 and a resistor R2. The first end of the resistor R2 is coupled to the second end of the fuse F1. The second terminal of the resistor R2 and the first terminal of the switch SW2 are coupled to the control terminal of the switch SW1. The second terminal of the switch SW2 is coupled to the reference voltage GND. The control terminal of the switch SW2 is coupled to the output terminal of the voltage comparator CMP. The first input terminal (eg, the non-inverting input terminal) of the voltage comparator CMP is coupled to the output terminal of the power supply circuit 110 . The second input terminal (eg, the inverting input terminal) of the voltage comparator CMP is coupled to the reference voltage Vref. The level of the reference voltage Vref can be determined according to design requirements. When the output voltage of the power supply circuit 110 is greater than the reference voltage Vref (the power supply of the power supply circuit 110 is normal), the voltage comparator CMP can turn on the switch SW2 . When the output voltage of the power supply circuit 110 is lower than the reference voltage Vref (the power supply of the power supply circuit 110 is abnormal), the voltage comparator CMP can turn off the switch SW2.

In the embodiment shown in FIG. 7 , the switch SW2 includes a resistor R1 and a transistor T1. The first terminal of the resistor R1 is coupled to the output terminal of the voltage comparator CMP. The control terminal (eg, the base) of the transistor T1 is coupled to the second terminal of the resistor R1 . The first terminal (eg, the collector) of the transistor T1 is coupled to the control terminal of the switch SW1 . The second end (eg, the emitter) of the transistor T1 is coupled to the reference voltage GND.

FIG. 8 is a schematic circuit block diagram of an electronic device 800 according to another embodiment of the present invention. According to design requirements, the electronic device 800 may be a power distribution unit (PDU) or other electronic devices. The electronic device 800 includes a power supply circuit 810 , a control circuit 820 , a connector 830 and a connector 840 . The connector 830 is adapted to connect to the connector 24 of another electronic device 20 . According to design requirements, the electronic device 20 may be a power distribution unit or other electronic devices. The connection interface between the connector 24 and the connector 830 can be set according to design requirements. For example, in some embodiments, connector 830 may be connected to connector 24 via a power cable. In other embodiments, the connector 830 can be connected to the connector 24 via a network cable, that is, the connector 24 and the connector 830 can provide a power-on-network (PON) function. The electronic device 20 further includes a power supply circuit 21 , a control circuit 22 and a connector 23 . The electronic device 20, the power supply circuit 21, the control circuit 22, the connector 23 and the connector 24 can be deduced by referring to the related descriptions of the electronic device 800, the power supply circuit 810, the control circuit 820, the connector 830 and the connector 840, so it is not necessary to To repeat.

The connector 840 is adapted to connect to the connector 33 of another electronic device 30 . According to design requirements, the electronic device 30 may be a power distribution unit or other electronic devices. The connection interface between the connector 33 and the connector 840 can be set according to design requirements. For example, in some embodiments, connector 840 may be connected to connector 33 via a power cable. In other embodiments, the connector 840 can be connected to the connector 33 via a network cable, that is, the connector 33 and the connector 840 can provide a power-on-network (PON) function. The electronic device 30 further includes a power supply circuit 31 , a control circuit 32 and a connector 34 . The electronic device 30, the power supply circuit 31, the control circuit 32, the connector 33 and the connector 34 can be deduced by referring to the related descriptions of the electronic device 800, the power supply circuit 810, the control circuit 820, the connector 830 and the connector 840, so no To repeat.

For the electronic device 800 shown in FIG. 8 , reference may be made to the related description of the flowchart shown in FIG. 2 . The power supply circuit 810 , the control circuit 820 , the connector 840 , the main power bus bar Vbus and the stabilizing capacitor C2 shown in FIG. 8 can refer to the power supply circuit 110 , the control circuit 120 , the connector 130 , and the main power bus bar shown in FIG. 1 The related descriptions of Vbus and the voltage-stabilizing capacitor C1 are analogous, so they will not be repeated.

In the embodiment shown in FIG. 8 , the control circuit 820 of the electronic device 800 can detect the power supply of the power supply circuit 810 of the electronic device 800 . When the power supply of the power supply circuit 810 of the electronic device 800 is normal, the control circuit 820 can couple the power supply circuit 810 to the connectors 830 and 840 of the electronic device 800 . Therefore, the power supply circuit 810 of the electronic device 800 can further supply power to another electronic device (eg, the electronic device 20 ) via the connector 830 , and the power supply circuit 810 of the electronic device 800 can further supply power to the further electronic device via the connector 840 . (eg electronic device 30). When the power supply of the power supply circuit 21 of the electronic device 20 is abnormal, the control circuit 22 can couple the connector 24 to the main power bus bar Vbus20 of the electronic device 20 . Therefore, the power supply circuit 810 of the electronic device 800 can supply power to the main power bus Vbus20 of the electronic device 20 through the connector 830 and the connector 24 to maintain the normal operation of the electronic device 20 . When the power supply of the power supply circuit 31 of the electronic device 30 is abnormal, the control circuit 32 can couple the connector 33 to the main power bus bar Vbus30 of the electronic device 30 . Therefore, the power supply circuit 810 of the electronic device 800 can supply power to the main power bus Vbus30 of the electronic device 30 through the connector 840 and the connector 3 to maintain the normal operation of the electronic device 30 .

The electronic device 20 and the electronic device 30 can also perform the process shown in FIG. 2 . When the power supply of the power supply circuit 21 of the electronic device 20 is normal, the control circuit 22 of the electronic device 20 can couple the power supply circuit 21 to the connectors 23 and 24 of the electronic device 20 . Therefore, the power supply circuit 21 of the electronic device 20 can further supply power to the electronic device 800 via the connector 24 . When the power supply of the power supply circuit 31 of the electronic device 30 is normal, the control circuit 32 of the electronic device 30 can couple the power supply circuit 31 to the connectors 33 and 34 of the electronic device 30 . Therefore, the power supply circuit 31 of the electronic device 30 can further supply power to the electronic device 800 via the connector 33 .

When the power supply of the power supply circuit 810 of the electronic device 800 is abnormal, the control circuit 820 can couple the connectors 830 and 840 to the main power bus Vbus of the electronic device 800 . Thus, the electronic device 20 can supply power to the main power bus Vbus of the electronic device 800 via the connector 830 , and/or the electronic device 30 can supply the main power bus Vbus of the electronic device 800 via the connector 840 . Regardless of whether the power supply circuit 810 of the electronic device 800 is abnormal, the main power bus Vbus of the electronic device 800 is supplied with power, thereby maintaining the normal operation of the electronic device 800 .

FIG. 9 is a circuit block diagram illustrating the control circuit 820 shown in FIG. 8 according to an embodiment of the present invention. In the embodiment shown in FIG. 9 , the control circuit 120 includes a diode D1 , a diode D2 , a diode D3 , a switch SW1 , a switch SW3 , a fuse F1 and a detection circuit 821 . The detection circuit 821 shown in FIG. 9 can be deduced by referring to the related descriptions of the detection circuit 121 shown in FIG. 5 , FIG. 6 and/or FIG. 7 , and thus will not be repeated.

Please refer to Figure 9. The anode of the diode D1 is coupled to the output terminal of the power supply circuit 810 . The cathode of the diode D1 and the first end of the fuse F1 are coupled to the main power bus Vbus. The anode of diode D2 and the first end of switch SW1 are coupled to connector 840 . The cathode of the diode D2 and the second terminal of the switch SW1 are coupled to the second terminal of the fuse F1. The anode of diode D3 and the first end of switch SW3 are coupled to connector 830 . The cathode of the diode D3 and the second terminal of the switch SW3 are coupled to the second terminal of the fuse F1. The detection circuit 821 is coupled to the power supply circuit 810 . The detection circuit 821 can detect the power supply of the power supply circuit 810 and output the control signal Sc1 to the control terminal of the switch SW1 and the control terminal of the switch SW3 according to the detection result. When the power supply of the power supply circuit 810 is normal, the detection circuit 821 can turn on the switch SW1 and the switch SW3. At this time, the output power of the power supply circuit 810 can be transmitted to the connector 840 through the diode D1 and the switch SW1, and the output power of the power supply circuit 810 can be transmitted to the connector 830 through the diode D1 and the switch SW3. When the power supply of the power supply circuit 810 is abnormal, the detection circuit 821 can turn off the switch SW1 and the switch SW3. At this time, the electronic device 20 can supply power to the main power bus Vbus of the electronic device 800 through the connector 830 and the diode D3, and/or the electronic device 30 can supply power through the connector 840 and the diode D2 The main power bus Vbus of the electronic device 800 .

According to different design requirements, the implementation of the blocks of the control circuit 120 , the detection circuit 121 , the control circuit 820 and/or the detection circuit 821 may be hardware, firmware, or software. , that is, program) or a combination of more than one of the above three.

In terms of hardware, the blocks of the control circuit 120 , the detection circuit 121 , the control circuit 820 and/or the detection circuit 821 can be implemented as logic circuits on an integrated circuit. The above-mentioned control circuit 120 , detection circuit 121 , control circuit 820 and/or related functions of the detection circuit 821 can be implemented using hardware description languages (such as Verilog HDL or VHDL) or other suitable programming languages for hardware. For example, the above-mentioned control circuit 120, detection circuit 121, control circuit 820, and/or related functions of detection circuit 821 can be implemented in one or more controllers, microcontrollers, microprocessors, special applications Various logic areas in an integrated circuit (Application-specific integrated circuit, ASIC), digital signal processor (digital signal processor, DSP), Field Programmable Gate Array (Field Programmable Gate Array, FPGA) and/or other processing units Blocks, modules and circuits.

In the form of software and/or firmware, the control circuit 120 , the detection circuit 121 , the control circuit 820 and/or the related functions of the detection circuit 821 can be implemented as programming codes. For example, the control circuit 120 , the detection circuit 121 , the control circuit 820 and/or the detection circuit 821 can be implemented using common programming languages (eg, C, C++ or assembly language) or other suitable programming languages. The programming code may be recorded/stored in a recording medium, for example, the recording medium includes a read only memory (Read Only Memory, ROM), a storage device and/or a random access memory (Random Access Memory, RAM) . A computer, a central processing unit (CPU), a controller, a microcontroller or a microprocessor can read and execute the programming code from the recording medium, thereby achieving related functions. As the recording medium, a "non-transitory computer readable medium" can be used, and for example, a tape, a disk, a card, a semiconductor memory, a Programming logic circuits, etc. Furthermore, the program may be provided to the computer (or CPU) via any transmission medium (communication network, broadcast waves, or the like). The communication network is, for example, the Internet, wired communication, wireless communication, or other communication media.

To sum up, the electronic device 100 (or 800 ) and the operation method thereof according to the above embodiments can detect the power supply of its own power supply circuit 110 (or 810 ). When the power supply of its own power supply circuit 110 (or 810 ) is normal (the own power supply circuit can supply power to its own main power bus Vbus), the control circuit 120 (or 820 ) can supply power to the power supply circuit 110 (or 810 ) ) is coupled to the connector (ie, its own power supply circuit 110 (or 810 ) can supply power to other electronic devices via the connector). When the power supply of the power supply circuit 110 (or 810 ) is abnormal, the control circuit 120 (or 820 ) can couple the connector to the main power bus Vbus (that is, other electronic devices can supply power to the main power bus through the connector) Vbus). Therefore, regardless of whether the own power supply circuit 110 (or 810 ) is abnormal, the main power bus Vbus of the electronic device 100 (or 800 ) is supplied with power.

Although the present invention has been disclosed above by the embodiments, it is not intended to limit the present invention. Anyone with ordinary knowledge in the technical field can make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, The protection scope of the present invention shall be determined by the scope of the appended patent application.

10, 20, 30, 100, 800: Electronic equipment 11, 21, 31, 110, 810: Power supply circuit 12, 22, 32, 120, 820: Control circuit 13, 23, 24, 33, 34, 130, 830, 840: Connectors 121, 821: detection circuit C1, C2: voltage regulator capacitors CMP: Voltage Comparator D1, D2, D3: Diodes F1: Fuse GND, Vref: reference voltage R1, R2: resistance S210～S250: Steps Sc1: Control signal SW1, SW2, SW3: switches T1: Transistor Vbus, Vbus10, Vbus2, Vbus30: Main power busbars

FIG. 1 is a schematic diagram of a circuit block of an electronic device according to an embodiment of the present invention. FIG. 2 is a schematic flowchart of an operating method of an electronic device according to an embodiment of the present invention. 3 is a circuit block diagram illustrating the control circuit shown in FIG. 1 according to an embodiment of the present invention. FIG. 4 is a circuit block diagram illustrating the control circuit shown in FIG. 1 according to another embodiment of the present invention. FIG. 5 is a circuit block diagram illustrating the control circuit shown in FIG. 1 according to still another embodiment of the present invention. FIG. 6 is a circuit block diagram illustrating the control circuit shown in FIG. 1 according to still another embodiment of the present invention. FIG. 7 is a circuit block diagram illustrating the detection circuit shown in FIG. 6 according to an embodiment of the present invention. FIG. 8 is a schematic circuit block diagram of an electronic device according to another embodiment of the present invention. FIG. 9 is a circuit block diagram illustrating the control circuit shown in FIG. 8 according to an embodiment of the present invention.

10, 100: Electronic equipment

11, 110: Power supply circuit

12, 120: Control circuit

13, 130: Connector

C1: voltage regulator capacitor

GND: reference voltage

Vbus, Vbus10: main power bus

Claims (11)

An electronic device comprising: a power supply circuit configured to supply power to a main power bus of the electronic device; a first connector adapted to connect to another electronic device; and A control circuit, coupled to the power supply circuit and the first connector, is configured to detect the power supply of the power supply circuit, wherein When the power supply of the power supply circuit is normal, the control circuit couples the power supply circuit to the first connector, so that the power supply circuit further supplies power to the other electronic device through the first connector, and When the power supply of the power supply circuit is abnormal, the control circuit couples the first connector to the main power bus of the electronic device, so that the other electronic device can supply power to the electronic device through the first connector This main power bus for the device. The electronic device of claim 1, wherein the control circuit comprises: a diode with an anode coupled to the output end of the power supply circuit, wherein a cathode of the diode is coupled to the main power bus; Wherein the first connector is coupled to the main power bus. The electronic device of claim 1, wherein the control circuit comprises: a diode having an anode coupled to the output end of the power supply circuit, wherein a cathode of the diode is coupled to the main power bus; and A fuse has a first end and a second end respectively coupled to the main power bus bar and the first connector. The electronic device of claim 1, wherein the control circuit comprises: a first diode having an anode coupled to the output end of the power supply circuit, wherein a cathode of the first diode is coupled to the main power bus; a second diode having an anode coupled to the first connector, wherein a cathode of the second diode is coupled to the main power bus; a switch having a first end coupled to the first connector, wherein a second end of the switch is coupled to the main power bus; and A detection circuit, coupled to the power supply circuit, is configured to detect the power supply of the power supply circuit, wherein when the power supply of the power supply circuit is normal, the detection circuit turns on the switch, and when the power supply When the power supply of the circuit is abnormal, the detection circuit turns off the switch. The electronic device of claim 1, wherein the control circuit comprises: a first diode having an anode coupled to the output end of the power supply circuit, wherein a cathode of the first diode is coupled to the main power bus; a fuse having a first end coupled to the main power bus; a second diode having an anode coupled to the first connector, wherein a cathode of the second diode is coupled to a second end of the fuse; a first switch having a first end coupled to the first connector, wherein a second end of the first switch is coupled to the second end of the fuse; and A detection circuit, coupled to the power supply circuit, is configured to detect the power supply of the power supply circuit, wherein when the power supply of the power supply circuit is normal, the detection circuit turns on the first switch, and when the power supply of the power supply circuit is normal, the detection circuit turns on the first switch, and when the power supply of the power supply circuit is normal When the power supply of the power supply circuit is abnormal, the detection circuit turns off the first switch. The electronic device of claim 5, wherein the detection circuit comprises: a voltage comparator having a first input terminal and a second input terminal respectively coupled to the output terminal of the power supply circuit and a first reference voltage; and a second switch having a control terminal coupled to an output terminal of the voltage comparator, wherein a first terminal of the second switch is coupled to a control terminal of the first switch, and a The second end is coupled to a second reference voltage. The electronic device of claim 6, wherein the second switch comprises: a first resistor having a first end coupled to the output end of the voltage comparator; and a transistor having a control end coupled to a second end of the first resistor, wherein a first end of the transistor is coupled to the control end of the first switch, and a second end of the transistor The terminal is coupled to the second reference voltage. The electronic device as claimed in claim 6, wherein the detection circuit further comprises: A second resistor has a first end coupled to the second end of the fuse, wherein a second end of the second resistor is coupled to the control end of the first switch. The electronic device according to claim 1, further comprising: a second connector, suitable for connecting another electronic device; Wherein when the power supply of the power supply circuit is normal, the control circuit also couples the power supply circuit to the second connector, so that the power supply circuit further supplies power to the further electronic device through the second connector; as well as Wherein when the power supply of the power supply circuit is abnormal, the control circuit also couples the second connector to the main power bus of the electronic device, so that the further electronic device can supply power to the electronic device through the second connector The main power bus of the electronic device. The electronic device of claim 9, wherein the control circuit comprises: a first diode having an anode coupled to the output end of the power supply circuit, wherein a cathode of the first diode is coupled to the main power bus; a fuse having a first end coupled to the main power bus; a second diode having an anode coupled to the first connector, wherein a cathode of the second diode is coupled to a second end of the fuse; a first switch having a first end coupled to the first connector, wherein a second end of the first switch is coupled to the second end of the fuse; a third diode having an anode coupled to the second connector, wherein a cathode of the third diode is coupled to the second end of the fuse; a second switch having a first end coupled to the second connector, wherein a second end of the second switch is coupled to the second end of the fuse; and a detection circuit, coupled to the power supply circuit, configured to detect the power supply of the power supply circuit, wherein when the power supply of the power supply circuit is normal, the detection circuit turns on the first switch and the second switch a switch, and when the power supply of the power supply circuit is abnormal, the detection circuit turns off the first switch and the second switch. An operating method of an electronic device, comprising: the power supply of a power supply circuit of the electronic equipment is detected by a control circuit of the electronic equipment; When the power supply of the power supply circuit is normal, the power supply circuit supplies power to a main power bus of the electronic device, and the control circuit couples the power supply circuit to a first connector of the electronic device , so that the power supply circuit of the electronic device can supply power to another electronic device through the first connector; and When the power supply of the power supply circuit is abnormal, the control circuit couples the first connector to the main power bus of the electronic device, so that the other electronic device can supply power to the electronic device through the first connector The main power bus for electronic equipment.

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