Dual DC power supply circuit

Abstract

The present invention discloses a dual DC power supply circuit, including: a first power interface, a second power interface and a power channel controller, wherein the first power interface is used to connect to a first power supply; the second power interface is used to connect to a second power supply; and the power channel controller is connected to the first power interface and the second power interface respectively to control the output of the first power supply and the second power supply. In this way, when the power consumption of the computer main board and the auxiliary board is large, the second power supply can be provided by connecting the second power interface. In this way, the first power supply and the second power supply are turned on and output by the power channel controller, thereby providing sufficient current for the auxiliary board. This avoids the occurrence of abnormal operation due to insufficient power supply to the auxiliary board.

Description

Technical Field

[0001] The invention relates to the technical field of computer power supply, and in particular to a dual direct current power supply circuit. Background Art

[0002] In the modular design of computers, in order to meet different market demands, computers can usually be divided into mainboards and sub-boards. The mainboard usually integrates the controller CPU and the modules necessary for the operation of the computer. The sub-board can choose different modules according to the needs of users. For example, SATA, serial port interface, parallel port interface, 4G module, 5G module, wifi / BT module, etc. are placed on another sub-board. When powering, the power supply on the mainboard can be used to power the sub-board. However, when there are many external devices on the sub-board, or the connected devices are relatively power-consuming, it may affect the power supply of the mainboard, resulting in abnormal overall power supply. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, one object of the present invention is to provide a dual DC power supply circuit.

[0004] To achieve the above object, a dual DC power supply circuit according to an embodiment of the present invention includes:

[0005] A first power interface, the first power interface is used to connect to a first power supply;

[0006] A second power interface, the second power interface is used to connect to a second power supply;

[0007] A power channel controller is connected to the first power interface and the second power interface respectively to control the output of the first power supply and the second power supply.

[0008] Further, according to an embodiment of the present invention, the power channel controller includes:

[0009] A first conductive switch, wherein an input end of the first conductive switch is connected to the first power interface, and an output end of the first conductive switch is connected to an output end of a power supply;

[0010] A second conductive switch, wherein an input end of the second conductive switch is connected to the second power interface, and an output end of the second conductive switch is connected to an output end of a power supply;

[0011] A channel control circuit is connected to the control ends of the first conductive switch and the second conductive switch respectively to control the conduction of the channel switches.

[0012] Further, according to an embodiment of the present invention, the first conduction switch includes a first MOS transistor Q2, the drain of the first MOS transistor Q2 is connected to the first power interface, the source of the first MOS transistor Q2 is connected to the power supply output end, and the gate of the first MOS transistor Q2 is connected to the control end of the channel control circuit.

[0013] Further, according to an embodiment of the present invention, the second conduction switch is a second MOS transistor Q3, the drain of the second MOS transistor Q3 is connected to the second power interface, the source of the second MOS transistor Q3 is connected to the power supply output end, and the gate of the second MOS transistor Q3 is connected to the control end of the channel control circuit.

[0014] Further, according to an embodiment of the present invention, the channel control circuit includes:

[0015] A third MOS transistor Q5, wherein the source of the third MOS transistor Q5 is connected to the reference ground, the drain of the third MOS transistor Q5 is respectively connected to the gates of the first MOS transistor Q2 and the second MOS transistor Q3, and the gate of the third MOS transistor Q5 is connected to the second power supply interface via a second resistor R5017.

[0016] Further, according to an embodiment of the present invention, the channel control circuit further includes: a voltage divider circuit, and the gate of the third MOS transistor Q5 is connected to the second power supply interface through the second resistor R5017 and the voltage divider circuit.

[0017] Further, according to an embodiment of the present invention, the voltage divider circuit includes:

[0018] a first resistor R5018, one end of the first resistor R5018 is connected to the second power interface, and the other end of the first resistor R5018 is connected to the gate of the third MOS transistor Q5 through the second resistor R5017;

[0019] A third resistor R5019, one end of the third resistor R5019 is connected to the other end of the first resistor R5018, and the other end of the third resistor R5019 is connected to the reference ground.

[0020] Further, according to an embodiment of the present invention, the first power supply and the second power supply are DC power supplies respectively.

[0021] The dual DC power supply circuit provided by the embodiment of the present invention is used to connect to the first power supply through the first power supply interface; the second power supply interface is used to connect to the second power supply; the power channel controller is connected to the first power supply interface and the second power supply interface respectively to control the output of the first power supply and the second power supply. In this way, when the power consumption of the computer main board and the sub-board is large, the second power supply can be provided by connecting the second power supply interface. In this way, the first power supply and the second power supply are turned on and output by the power channel controller, so that sufficient current can be provided for the sub-board. Avoid the occurrence of abnormal operation caused by insufficient power supply to the sub-board. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the structure of a dual DC power supply circuit provided in an embodiment of the present invention;

[0023] Figure 2 A schematic diagram of the structure of a first power interface circuit provided by an embodiment of the present invention;

[0024] Figure 3 A schematic diagram of the structure of a second power interface circuit provided by an embodiment of the present invention;

[0025] Figure 4 A schematic diagram of the structure of a power channel controller circuit provided by an embodiment of the present invention;

[0026] Figure 5 A schematic diagram of the structure of a power-consuming circuit board / peripheral circuit provided in an embodiment of the present invention.

[0027] Reference numerals:

[0028] A first power interface 101;

[0029] A second power interface 102;

[0030] Power channel controller 103;

[0031] Channel control circuit 1031;

[0032] Sub-board peripherals 104 .

[0033] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings in conjunction with the embodiments. DETAILED DESCRIPTION

[0034] In order to make those skilled in the art better understand the scheme of the present invention, the technical scheme in the embodiment of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the present invention. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0035] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0036] See also Figures 1 to 3 The embodiment of the present invention provides a dual DC power supply circuit, including: a first power interface 101, a second power interface 102 and a power channel controller 103, wherein the first power interface 101 is used to connect to a first power supply; the second power interface 102 is used to connect to a second power supply; Figure 1 As shown in the figure, through the first power interface 101 and the second power interface 102, two output power supplies can be connected respectively. In one embodiment of the present invention, the first power supply introduced by the first power interface 101 can be used as the power supply of the main circuit board. In general, in order to reduce the number of users inserting two power supplies, this power supply can also provide power for some peripherals. The first power supply and the second power supply are DC power supplies.

[0037] The power channel controller 103 is connected to the first power interface 101 and the second power interface 102 respectively to control the output of the first power supply and the second power supply. When there are many external devices on the sub-board, or the connected devices are relatively power-consuming, the first power supply introduced only through the first power interface 101 may affect the power supply of the main board due to insufficient current, resulting in abnormal overall power supply. At this time, the second power supply can be introduced through the second power interface 102, and the first power supply introduced by the first power interface 101 and the second power supply introduced by the second power interface 102 can be controlled to be turned on and output through the power channel controller 103 to meet the power supply requirements of the sub-board. Thereby ensuring the normal power supply of the main board and the sub-board.

[0038] The dual DC power supply circuit provided by the embodiment of the present invention is used to connect to the first power supply through the first power supply interface 101; the second power supply interface 102 is used to connect to the second power supply; the power channel controller 103 is connected to the first power supply interface 101 and the second power supply interface 102 respectively to control the output of the first power supply and the second power supply. In this way, when the power consumption of the computer main board and the sub-board is large, the second power supply can be provided by connecting the second power supply interface 102. In this way, the first power supply and the second power supply are turned on and output through the power channel controller 103, so that sufficient current can be provided for the sub-board. Avoid the occurrence of abnormal operation due to insufficient power supply to the sub-board.

[0039] See also Figure 1 and Figure 4 The power channel controller 103 includes: a first conductive switch, a second conductive switch and a channel control circuit 1031, the input end of the first conductive switch is connected to the first power interface 101, and the output end of the first conductive switch is connected to the power supply output end; Figure 4 As shown in , the first conduction switch includes a first MOS transistor Q2, the drain of the first MOS transistor Q2 is connected to the first power interface 101, the source of the first MOS transistor Q2 is connected to the power supply output terminal, and the gate of the first MOS transistor Q2 is connected to the control terminal of the channel control circuit 1031. By controlling the conduction of the first MOS transistor Q2, the output control of the first power supply introduced by the first power interface 101 can be realized.

[0040] The input end of the second conductive switch is connected to the second power interface 102, and the output end of the second conductive switch is connected to the power supply output end; Figure 4 As shown in , the second conduction switch is a second MOS transistor Q3, the drain of the second MOS transistor Q3 is connected to the second power interface 102, the source of the second MOS transistor Q3 is connected to the power supply output terminal, and the gate of the second MOS transistor Q3 is connected to the control terminal of the channel control circuit 1031. By controlling the conduction of the second MOS transistor Q3, the output control of the second power supply introduced by the second power interface 102 can be achieved. The switch control of the power supply is achieved by two MOS transistors. In this way, the volume is relatively small and the switching speed is fast.

[0041] The channel control circuit 1031 is connected to the control terminals of the first conductive switch and the second conductive switch respectively to control the conduction of the channel switches. Figure 4As shown in , the channel control circuit 1031 includes: a third MOS transistor Q5, the source of the third MOS transistor Q5 is connected to the reference ground, the drain of the third MOS transistor Q5 is respectively connected to the gates of the first MOS transistor Q2 and the second MOS transistor Q3, and the gate of the third MOS transistor Q5 is connected to the second power interface 102 through the second resistor R5017. Its working process is that when there are many external devices on the secondary board, or the connected devices are relatively power-consuming, the second power supply DC_VIN2 can be introduced through the second power interface 102. Since the second power supply DC_VIN2 is a DC power supply, the high-level voltage of the second power supply DC_VIN2 acts on the gate of the third MOS transistor Q5, and the third MOS transistor Q5 is turned on. At this time, the first MOS transistor Q2 and the second MOS transistor Q3 are also turned on at the same time, so that the first power supply introduced by the first power interface 101 and the second power supply introduced by the second power interface 102 can be output, so that sufficient current can be provided for the secondary board. Avoid the occurrence of abnormal operation due to insufficient power supply to the secondary board.

[0042] See also Figure 4 , the channel control circuit 1031 further includes: a voltage divider circuit, the gate of the third MOS transistor Q5 is connected to the second power interface 102 through the second resistor R5017 and the voltage divider circuit. In some cases, the voltage range of the second power supply DC_VIN2 introduced by the second power interface 102 may be relatively large, and after being respectively compressed by the voltage divider circuit, it can adapt to the driving voltage range of the MOS transistor. Figure 4 As shown in , the voltage divider circuit includes: a first resistor R5018 and a third resistor R5019, one end of the first resistor R5018 is connected to the second power interface 102, and the other end of the first resistor R5018 is connected to the gate of the third MOS transistor Q5 through the second resistor R5017; one end of the third resistor R5019 is connected to the other end of the first resistor R5018, and the other end of the third resistor R5019 is connected to the reference ground. The voltage divider circuit is formed by the first resistor R5018 and the third resistor R5019, and after the second power supply DC_VIN2 is divided, it is output to the gate of the third MOS transistor Q5 through the second resistor R5017 to drive the gate of the third MOS transistor Q5.

[0043] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0044] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A dual DC power supply circuit, characterized in that: include: A first power interface, the first power interface is used to connect to a first power supply; A second power interface, the second power interface is used to connect to a second power supply; A power channel controller, the power channel controller is connected to the first power interface and the second power interface respectively to control the output of the first power supply and the second power supply; Wherein, the power channel controller comprises: A first conductive switch, wherein an input end of the first conductive switch is connected to the first power interface, and an output end of the first conductive switch is connected to an output end of a power supply; A second conductive switch, wherein an input end of the second conductive switch is connected to the second power interface, and an output end of the second conductive switch is connected to an output end of a power supply; a channel control circuit, wherein the channel control circuit is connected to the control ends of the first conductive switch and the second conductive switch respectively to control the conduction of the first conductive switch and the second conductive switch; The first conduction switch comprises a first MOS transistor (Q2), a drain of the first MOS transistor (Q2) is connected to the first power interface, a source of the first MOS transistor (Q2) is connected to the power supply output terminal, and a gate of the first MOS transistor (Q2) is connected to the control terminal of the channel control circuit; The second conduction switch is a second MOS transistor (Q3), the drain of the second MOS transistor (Q3) is connected to the second power interface, the source of the second MOS transistor (Q3) is connected to the power supply output end, and the gate of the second MOS transistor (Q3) is connected to the control end of the channel control circuit; Wherein, the channel control circuit comprises: a third MOS transistor (Q5), wherein a source of the third MOS transistor (Q5) is connected to a reference ground, a drain of the third MOS transistor (Q5) is connected to the gates of the first MOS transistor (Q2) and the second MOS transistor (Q3), respectively, and a gate of the third MOS transistor (Q5) is connected to the second power interface via a second resistor (R5017); The first power supply and the second power supply are DC power supplies respectively.

2. The dual DC power supply circuit according to claim 1, characterized in that: The channel control circuit further includes: a voltage divider circuit, and the gate of the third MOS transistor (Q5) is connected to the second power supply interface through the second resistor (R5017) and the voltage divider circuit.

3. The dual DC power supply circuit according to claim 2, characterized in that: The voltage divider circuit comprises: a first resistor (R5018), one end of the first resistor (R5018) being connected to the second power interface, and the other end of the first resistor (R5018) being connected to the gate of the third MOS transistor (Q5) through the second resistor (R5017); A third resistor (R5019), one end of the third resistor (R5019) is connected to the other end of the first resistor (R5018), and the other end of the third resistor (R5019) is connected to a reference ground.

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