Power supply circuit and mainboard

Abstract

The embodiment of the utility model provides a power supply circuit and a mainboard. The power supply circuit comprises a voltage conversion module, a switch module, a control module, a working power supply input end, a standby power supply input end, a working power supply output end and a standby power supply output end, the input end of the voltage conversion module is electrically connected with the input end of the working power supply, the first output end of the voltage conversion module is electrically connected with the first input end of the switch module, and the second output end of the voltage conversion module is also electrically connected with the output end of the working power supply; the second input end of the switch module is electrically connected with the input end of the standby power supply, the output end of the switch module is electrically connected with the output end of the standby power supply, the control end of the control module is electrically connected with the input end of the standby power supply, and the output end of the control module is electrically connected with the control end of the switch module. The mainboard can be powered by multiple modes of power supplies, and device damage caused by multiple welding can be avoided.

Description

Technical Field

[0001] The present application relates to the field of computer technology, and in particular to a power supply circuit and a mainboard. Background Art

[0002] Some existing motherboards are compatible with multiple power supply modes. For example, the first mode power supply includes working power supply and standby power supply, and the working power supply can support software control to realize power on and off. The second mode power supply has only one set of working power supply, does not include standby power supply, does not support software control, and will be powered on after connecting to AC input power.

[0003] In the related art, a motherboard compatible with multiple power supply modes usually switches the power supply by re-welding components, but the re-welding component method is prone to multiple welding, which may damage the components and reduce the service life of the motherboard. Utility Model Content

[0004] The embodiments of the present application provide a power supply circuit and a mainboard, which can solve the problem that switching of power supply by welding components can easily cause damage to components and reduce the service life of the mainboard.

[0005] In a first aspect, an embodiment of the present application provides a power supply circuit, including: a voltage conversion module, a switch module, a control module, a working power input terminal, a standby power input terminal, a working power output terminal, and a standby power output terminal;

[0006] The input end of the voltage conversion module is electrically connected to the working power input end, the first output end of the voltage conversion module is electrically connected to the first input end of the switch module, and the second output end of the voltage conversion module is also electrically connected to the working power output end;

[0007] The second input terminal of the switch module is electrically connected to the standby power input terminal, and the output terminal of the switch module is electrically connected to the standby power output terminal;

[0008] The control end of the control module is electrically connected to the standby power input end, and the output end of the control module is electrically connected to the control end of the switch module.

[0009] Optionally, the switch module includes a first transistor and a second transistor;

[0010] The control electrode of the first transistor is electrically connected to the output end of the control module, the first electrode of the first transistor is electrically connected to the first input end of the switch module, and the second electrode of the first transistor is electrically connected to the standby power supply output end;

[0011] The control electrode of the second transistor is electrically connected to the output end of the control module, the first electrode of the second transistor is electrically connected to the second input end of the switch module, and the second electrode of the second transistor is electrically connected to the standby power supply output end.

[0012] Optionally, the first transistor is an N-channel MOS transistor, the control electrode of the first transistor is the gate of the N-channel MOS transistor, the first electrode of the first transistor is the source of the N-channel MOS transistor, and the second electrode of the first transistor is the drain of the N-channel MOS transistor.

[0013] Optionally, the second transistor is a P-channel MOS tube, the control electrode of the second transistor is the gate of the P-channel MOS tube, the first electrode of the second transistor is the drain of the P-channel MOS tube, and the second electrode of the second transistor is the source of the P-channel MOS tube.

[0014] Optionally, the first transistor and / or the second transistor is a power MOS transistor.

[0015] Optionally, the control module includes a third transistor;

[0016] The control electrode of the third transistor is electrically connected to the standby power input terminal and the ground terminal respectively, the first electrode of the third transistor is electrically connected to the working power input terminal and the control terminal of the switch module respectively, and the second electrode of the third transistor is grounded.

[0017] Optionally, the third transistor is an N-channel MOS tube, the control electrode of the third transistor is the gate of the N-channel MOS tube, the first electrode of the third transistor is the source of the N-channel MOS tube, and the second electrode of the third transistor is the drain of the N-channel MOS tube.

[0018] Optionally, the power supply circuit further includes a first filtering module and a second filtering module;

[0019] The first filtering module is electrically connected to the first output end of the voltage conversion module and the first input end of the switch module respectively;

[0020] The second filter module is electrically connected to the standby power input terminal and the second input terminal of the switch module respectively.

[0021] Optionally, the power supply circuit further includes a third filtering module;

[0022] The third filter module is electrically connected to the output end of the switch module and the standby power output end respectively.

[0023] Optionally, the voltage conversion module further includes: a first voltage conversion unit, an input filtering unit and an output filtering unit;

[0024] The input end of the first voltage conversion unit is electrically connected to the working power input end and the input filter unit respectively, and the output end of the first voltage conversion unit is electrically connected to the first output end and the output filter unit respectively.

[0025] In a second aspect, an embodiment of the present application provides a mainboard, comprising: a connector, and a power supply circuit as described in the first aspect; the power supply circuit is electrically connected to the connector.

[0026] Optionally, the connector includes a working power pin and a standby power pin;

[0027] In the case where the mainboard has a suspend function, the working power input terminal of the power supply circuit is electrically connected to the working power pin of the connector, and the standby power input terminal of the power supply circuit is electrically connected to the standby power pin of the connector;

[0028] In the case that the mainboard does not have the suspend function, the working power input terminal is electrically connected to the working power pin, and the standby power input terminal and the standby power pin are suspended.

[0029] The embodiments of the present application include the following advantages:

[0030] The power supply circuit of the embodiment of the present application, when the mainboard adopts the first mode power supply, the working power input end of the power supply circuit can be connected to the working power supply, and the standby power input end can be connected to the standby power supply. When the mainboard adopts the second mode power supply, the working power input end can be connected to the working power supply, and the standby power input end can be suspended. Since the control end of the control module is electrically connected to the standby power input end, the output end of the control module is electrically connected to the control end of the switch module. In practical applications, when the standby power input end is connected to the standby power supply, the control module can send a control signal to the switch module to control the switch module to conduct the standby power input end and the standby power output end. Since the first input end of the switch module is electrically connected to the first output end of the voltage conversion module, the second input end of the switch module is electrically connected to the standby power input end, and the output end of the switch module is electrically connected to the standby power output end, the switch module can respond to the control signal sent by the control module to switch the power supply connected to the standby power output end. The mainboard can be powered by the standby power supply voltage obtained by converting the working power supply voltage by the voltage conversion module, or by the standby power supply connected to the standby power supply input terminal, so as to be compatible with the first mode power supply and the second mode power supply, and the working power supply output terminal can be powered by the working power of the two mode power supplies through the voltage conversion module. The power supply circuit provided in the embodiment of the present application can be compatible with supporting multiple mode power supplies to power the mainboard. Compared with the existing method of modifying the welding device, the problem of device damage caused by multiple welding can be avoided, and the service life of the mainboard can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0032] Figure 1 is a circuit structure diagram of a power supply circuit provided in an embodiment of the present application;

[0033] Figure 2 is a circuit structure schematic diagram of another power supply circuit provided in an embodiment of the present application;

[0034] Figure 3 is a circuit connection diagram of a first voltage conversion unit provided in an embodiment of the present application;

[0035] Figure 4 is a circuit connection diagram of a second voltage conversion unit provided in an embodiment of the present application;

[0036] Figure 5This is one of the connection diagrams between the power supply circuit and the connector provided in the embodiment of the present application;

[0037] Figure 6 This is the second connection diagram between the power supply circuit and the connector provided in the embodiment of the present application;

[0038] Figure 7 It is a circuit diagram of a method of modifying soldering devices in the related art.

[0039] Reference numerals:

[0040] Power supply circuit 10; voltage conversion module 101; first output terminal 1011; second output terminal 1012; first voltage conversion unit 1013; input filter unit 1014; output filter unit 1015; first voltage conversion unit 1016; switch module 102; first input terminal 1021; second input terminal 1022; first transistor 1023; second transistor 1024; control module 103; third transistor 1031; working power input terminal 104; standby power input terminal 105; working power output terminal 106; standby power output terminal 107; first filter module 108; second filter module 109; third filter module 110; connector 20; working power pin 201; standby power pin 202. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0042] First, the related technologies involved in the embodiments of the present application are described.

[0043] The computer module extension standard (COM Express, COM-E) is a modular computer specification. The COM Express specification was developed by the International Industrial Computer Manufacturers Group (PICMG). Motherboards that comply with the COM-E specification are also called COMe modules. Some existing COMe modules must be connected to both the 12V working power supply and the 5V standby power supply, and only support ATX power supply. Some COMe modules only support a single 12V working power supply and can only be powered by an AT power supply. Although some COMe modules are compatible with ATX power supply and AT power supply, they need to switch the power supply of the COMe baseboard by re-welding the device. The single power supply mode limits the application scenarios of the COMe module and also increases the cost of secondary development. The re-welding device method is likely to cause confusion in materials and welding status, and multiple welding is likely to damage the device, reducing the service life of the COMe module.

[0044] The COMe module is electrically connected to the COMe baseboard through the COMe connector. The COMe baseboard can be powered by an ATX power supply or an AT power supply. The plane size of the COMe module has various specifications, and one or more connectors can be used, and the relative position of the connectors remains unchanged. There are many definition specifications for connectors, and the requirements for power supply in various specifications are unified. The COMe connector has two power pins, VCC_12V and VCC_5V_SBY. VCC_12V is the normal working power supply, and VCC_5V_SBY is the 5V standby power supply. The power required for the COMe module to work can be generated by VCC_12V and VCC_5V_SBY through the COMe module's own power chip.

[0045] The ATX power supply includes two sets of power supplies: one is the working power supply, such as 12V, 5V, 3.3V and -12V, and the other is the standby power supply, such as 5V standby power supply. As long as the ATX power supply is connected to the AC input power supply, its standby power supply can be output normally. However, it is necessary to satisfy both that the ATX power supply has an AC input power supply and that the control signal PS_ON# of the ATX power supply remains at a low level, so that the working power supply of the ATX power supply can be output normally, that is, the working power supply of the ATX power supply can support software control to realize power on and off. The AT power supply only has a working power supply, does not include a standby power supply, and does not support software control. The AT power supply will be powered on after it is connected to the AC input power supply.

[0046] Secondly, refer to Figure 1, shows a circuit structure diagram of a power supply circuit 10 provided in an embodiment of the present application, the power supply circuit 10 includes: a voltage conversion module 101, a switch module 102, a control module 103, a working power input terminal 104, a standby power input terminal 105, a working power output terminal 106, and a standby power output terminal 107;

[0047] The input end of the voltage conversion module 101 is electrically connected to the working power input end 104, the first output end 1011 of the voltage conversion module 101 is electrically connected to the first input end 1021 of the switch module 102, and the second output end 1012 of the voltage conversion module 101 is also electrically connected to the working power output end 106;

[0048] The second input terminal 1022 of the switch module 102 is electrically connected to the standby power input terminal 105, and the output terminal of the switch module 102 is electrically connected to the standby power output terminal 107;

[0049] The control end of the control module 103 is electrically connected to the standby power input end 105 , and the output end of the control module 103 is electrically connected to the control end of the switch module 102 .

[0050] In the embodiment of the present application, the power supply circuit 10 can be applied to a COMe module, and can be compatible with ATX power supply and AT power supply. The COMe module is powered by a COMe baseboard through a COMe connector, and the ATX power supply and AT power supply are arranged on the COMe baseboard. Although some existing COMe modules can also be compatible with ATX power supply and AT power supply, they usually adopt the method of changing the welding device to realize the power supply switching. Multiple welding can easily damage the device and reduce the service life of the COMe module. The power supply circuit 10 provided in the embodiment of the present application does not need to change the hardware state, can be adaptively compatible with ATX power supply and AT power supply, can avoid the problem of device damage caused by multiple welding, and can improve the service life of the COMe module.

[0051] In the embodiment of the present application, the working power input terminal 104 and the standby power input terminal 105 are used to connect an external power supply. For example, the working power input terminal 104 can be electrically connected to the working power supply of the mainboard, and the standby power input terminal 105 can be electrically connected to the standby power supply of the mainboard. The working power output terminal 106 and the standby power output terminal 107 are used to connect the power modules of the mainboard, and can supply power to each module in the working power domain and the standby power domain. Among them, the working power output terminal 106 and the standby power output terminal 107 can be electrically connected to the power chip respectively, and various power supply voltages required by the mainboard are output through the power chip.

[0052] In the embodiment of the present application, the standby power supply voltage outputted by the standby power supply output terminal 107 may be provided by the standby power supply connected to the standby power supply input terminal 105, or may be obtained by converting the working power supply voltage inputted by the working power supply input terminal 104 through the voltage conversion module 101. In this way, the power supply circuit 10 can support the first mode power supply and the second mode power supply to supply power to the mainboard.

[0053] In the embodiment of the present application, the connection path corresponding to the standby power output terminal 107 includes a first path and a second path, and the path switching is realized by the switch module 102. Specifically, the first path includes the working power input terminal 104 to the voltage conversion module 101, from the voltage conversion module 101 through the first input terminal 1021 of the switch module 102 and the output terminal of the switch module 102, and finally to the standby power output terminal 107. The second path includes the standby power input terminal 105 to the second input terminal 1022 of the switch module 102, through the output terminal of the switch module 102 and finally to the standby power output terminal 107.

[0054] In the embodiment of the present application, the control module 103 is used to perform switch gating control on the connection path corresponding to the standby power output terminal 107. When the standby power input terminal 105 is connected to the standby power, the control module 103 can control the switch module 102 to conduct the second path corresponding to the standby power output terminal 107, that is, to conduct the standby power input terminal 105, the second input terminal 1022 of the switch module 102 and the standby power output terminal 107, and the standby power provides the standby power voltage to the mainboard. When the standby power input terminal 105 is not connected to the standby power and the working power is powered on, the control module 103 can control the switch module 102 to conduct the first path corresponding to the standby power output terminal 107, that is, to conduct the working power input terminal 104, the voltage conversion module 101, the first input terminal 1021 of the switch module 102 and the standby power output terminal 107. It should be noted that even if the motherboard does not have a suspend function, the motherboard's memory particles, bridge chips and other devices also need power supply. When the standby power input terminal 105 is not connected to the standby power supply and the working power supply is powered on, the voltage conversion module 101 converts the working power supply voltage to obtain the standby power supply voltage, and sends the standby power supply voltage to the standby power supply output terminal 107 through the switch module 102. The standby power supply voltage output by the standby power supply output terminal 107 can power memory particles, bridge chips, etc.

[0055] In the power supply circuit 10 of the embodiment of the present application, when the mainboard adopts the first mode power supply, the working power input terminal 104 of the power supply circuit 10 can be connected to the working power supply, and the standby power input terminal 105 can be connected to the standby power supply. When the mainboard adopts the second mode power supply, the working power input terminal 104 can be connected to the working power supply, and the standby power input terminal 105 can be suspended. Since the control end of the control module 103 is electrically connected to the standby power input terminal 105, and the output end of the control module 103 is electrically connected to the control end of the switch module 102, in actual application, when the standby power input terminal 105 is connected to the standby power supply, the control module 103 can send a control signal to the switch module 102 to control the switch module 102 to conduct the standby power input terminal 105 and the standby power output terminal 107. Since the first input terminal 1021 of the switch module 102 is electrically connected to the first output terminal 1011 of the voltage conversion module 101, the second input terminal 1022 of the switch module 102 is electrically connected to the standby power input terminal 105, and the output terminal of the switch module 102 is electrically connected to the standby power output terminal 107, the switch module 102 can switch the power supply connected to the standby power output terminal 107 in response to the control signal sent by the control module 103. The standby power supply voltage obtained by the voltage conversion module 101 to convert the working power supply voltage can be powered, or the standby power supply connected to the standby power input terminal 105 can be powered, so as to be compatible with the first mode power supply and the second mode power supply, and the working power supply output terminal 106 can be powered by the working power supply of the two mode power supplies through the voltage conversion module 101. The power supply circuit 10 provided in the embodiment of the present application can be compatible with supporting multiple mode power supplies to power the mainboard without changing the hardware state. Compared with the existing method of changing the welding device, the problem of device damage caused by multiple welding can be avoided, and the service life of the mainboard can be improved.

[0056] Optionally, the switch module 102 includes a first transistor 1023 and a second transistor 1024;

[0057] The control electrode of the first transistor 1023 is electrically connected to the output end of the control module 103, the first electrode of the first transistor 1023 is electrically connected to the first input end 1021 of the switch module 102, and the second electrode of the first transistor 1023 is electrically connected to the standby power output end 107;

[0058] The control electrode of the second transistor 1024 is electrically connected to the output end of the control module 103 , the first electrode of the second transistor 1024 is electrically connected to the second input end 1022 of the switch module 102 , and the second electrode of the second transistor 1024 is electrically connected to the standby power output end 107 .

[0059] In the embodiment of the present application, the control terminals of the first transistor 1023 and the second transistor 1024 are connected in common and electrically connected to the output terminal of the control module 103, so that the control module 103 can control the first transistor 1023 and the second transistor 1024 at the same time. The first transistor 1023 can receive the standby power supply voltage transmitted by the first output terminal 1011 of the voltage conversion module 101, and the second transistor 1024 can receive the standby power supply voltage input by the standby power supply connected to the power supply circuit 10. In the case where the standby power supply input terminal 105 is connected to the standby power supply, the control module 103 can control the second transistor 1024 to be turned on, so that the standby power supply voltage input by the standby power supply is transmitted to the standby power supply output terminal 107 through the second transistor 1024. In the case where the standby power supply input terminal 105 is not connected to the standby power supply and the working power supply is powered on, the control module 103 can control the first transistor 1023 to be turned on, so that the standby power supply voltage obtained by the voltage conversion module 101 from the working power supply voltage conversion can be transmitted to the standby power supply output terminal 107 through the first transistor 1023.

[0060] In the embodiment of the present application, one of the first transistor 1023 and the second transistor 1024 can be an NMOS tube and the other can be a PMOS tube. The control terminal connected to the first transistor 1023 and the second transistor 1024 can be a gate connected to the NMOS tube and the PMOS tube. The control signal sent by the control module 103 to the first transistor 1023 and the second transistor 1024 can be a high-level signal or a low-level signal, so that only one MOS tube of the first transistor 1023 and the second transistor 1024 is turned on, and the other MOS tube is turned off, thereby switching the connection path corresponding to the standby power supply output terminal 107. The first transistor 1023 and / or the second transistor 1024 can be a power MOS tube, which has a larger current capacity and a smaller on-state resistance and can be used for a power switch. Among them, the MOS tube is a metal oxide semiconductor (Metal Oxide Semiconductor, MOS) field effect transistor, the NMOS tube is an N-channel MOS tube, and the PMOS tube is a P-channel MOS tube.

[0061] Optionally, the first transistor 1023 is an N-channel MOS tube, the control electrode of the first transistor 1023 is the gate of the N-channel MOS tube, the first electrode of the first transistor 1023 is the source of the N-channel MOS tube, and the second electrode of the first transistor 1023 is the drain of the N-channel MOS tube.

[0062] In the present application embodiment, Figure 2As shown, the first transistor 1023 may be an NMOS tube, the gate (G) of the NMOS tube is electrically connected to the output terminal of the control module 103, the source (S) of the NMOS tube is electrically connected to the first input terminal 1021 of the switch module 102, and the drain (D) of the NMOS tube is electrically connected to the standby power output terminal 107. When the control signal sent by the control module 103 to the NMOS tube is a high-level signal, the NMOS tube is turned on, so that the first path corresponding to the standby power output terminal 107 is turned on, that is, the working power input terminal 104, the first output terminal 1011 of the voltage conversion module 101, the NMOS tube and the standby power output terminal 107 are turned on.

[0063] In the embodiment of the present application, since the first transistor 1023 is an N-channel MOS tube, the control electrode of the first transistor 1023 is the gate of the N-channel MOS tube, the first electrode of the first transistor 1023 is the source of the N-channel MOS tube, the second electrode of the first transistor 1023 is the drain of the N-channel MOS tube, and the N-channel MOS tube is turned on at a high level, the control module 103 can control the N-channel MOS tube to be turned on by sending a high-level signal to the N-channel MOS tube, thereby turning on the first output terminal 1011 of the voltage conversion module 101 connected to the first electrode of the N-channel MOS tube and the standby power supply output terminal 107 connected to the second electrode of the N-channel MOS tube, thereby improving the practicality of the power supply circuit 10 in the embodiment of the present application.

[0064] Optionally, the second transistor 1024 is a P-channel MOS tube, the control electrode of the second transistor 1024 is the gate of the P-channel MOS tube, the first electrode of the second transistor 1024 is the drain of the P-channel MOS tube, and the second electrode of the second transistor 1024 is the source of the P-channel MOS tube.

[0065] In the present application embodiment, Figure 2 As shown, the second transistor 1024 can be a PMOS tube, the gate (G) of the PMOS tube is electrically connected to the output terminal of the control module 103, the source (S) of the PMOS tube is electrically connected to the standby power output terminal 107, and the drain (D) of the PMOS tube is electrically connected to the second input terminal 1022 of the switch module 102. When the control signal sent by the control module 103 to the PMOS tube is a low-level signal, the PMOS tube is turned on, so that the second path corresponding to the standby power output terminal 107 is turned on, that is, the standby power input terminal 105, the PMOS tube and the standby power output terminal 107 are turned on.

[0066] In the embodiment of the present application, since the second transistor 1024 is a P-channel MOS tube, the control electrode of the second transistor 1024 is the gate of the P-channel MOS tube, the first electrode of the second transistor 1024 is the drain of the P-channel MOS tube, and the second electrode of the second transistor 1024 is the source of the P-channel MOS tube. The P-channel MOS tube is turned on at a low level, so the control module 103 can control the P-channel MOS tube to be turned on by sending a low-level signal to the P-channel MOS tube, thereby turning on the standby power input terminal 105 connected to the first electrode of the P-channel MOS tube and the standby power output terminal 107 connected to the second electrode of the P-channel MOS tube, thereby improving the practicality of the power supply circuit 10 of the embodiment of the present application.

[0067] In the embodiment of the present application, since the control electrode of the first transistor 1023 is electrically connected to the output terminal of the control module 103, the first electrode of the first transistor 1023 is electrically connected to the first input terminal 1021 of the switch module 102, and the second electrode of the first transistor 1023 is electrically connected to the standby power output terminal 107, the control module 103 can control the first transistor 1023 to be turned on, thereby turning on the first output terminal 1011 of the voltage conversion module 101 and the standby power output terminal 107. Since the control electrode of the second transistor 1024 is electrically connected to the output terminal of the control module 103, the first electrode of the second transistor 1024 is electrically connected to the second input terminal 1022 of the switch module 102, and the second electrode of the second transistor 1024 is electrically connected to the standby power output terminal 107, the control module 103 can control the second transistor 1024 to be turned on, thereby turning on the standby power input terminal 105 and the standby power output terminal 107. In this way, the control module 103 can conveniently implement switch selection control through the first transistor 1023 and the second transistor 1024, flexibly adjust the connection path corresponding to the standby power output terminal 107, and can be compatible with supporting multiple mode power supplies to power the mainboard, thereby improving the practicality of the power supply circuit 10 of the embodiment of the present application.

[0068] Optionally, the control module 103 includes a third transistor 1031;

[0069] The control electrode of the third transistor 1031 is electrically connected to the standby power input terminal 105 and the ground terminal respectively, the first electrode of the third transistor 1031 is electrically connected to the working power input terminal 104 and the control terminal of the switch module 102 respectively, and the second electrode of the third transistor 1031 is grounded.

[0070] In the embodiment of the present application, the control electrode of the third transistor 1031 is electrically connected to the standby power input terminal 105. When the standby power input terminal 105 is connected to the standby power, the control electrode of the third transistor 1031 can receive a high-level signal input by the standby power. The control electrode of the third transistor 1031 is electrically connected to the ground terminal. When the standby power input terminal 105 is not connected to the standby power, for example, when the standby power input terminal 105 is suspended, the control electrode of the third transistor 1031 is pulled down to receive a low-level signal. When the third transistor 1031 is turned on, the control terminal of the switch module 102 is turned on to the ground terminal, and the control module 103 sends a low-level signal to the switch module 102. When the third transistor 1031 is not turned on, the control terminal of the switch module 102 is turned on to the working power input terminal 104, and the control module 103 sends a high-level signal to the switch module 102.

[0071] Optionally, the third transistor 1031 is an N-channel MOS tube, the control electrode of the third transistor 1031 is the gate of the N-channel MOS tube, the first electrode of the third transistor 1031 is the source of the N-channel MOS tube, and the second electrode of the third transistor 1031 is the drain of the N-channel MOS tube.

[0072] In the present application embodiment, Figure 2 As shown, the third transistor 1031 can be an NMOS tube, the gate (G) of the NMOS tube is electrically connected to the standby power input terminal 105 and the ground terminal respectively, the source (S) of the NMOS tube is electrically connected to the working power input terminal 104 and the control terminal of the switch module 102, and the drain (D) of the NMOS tube is electrically connected to the ground terminal. When the standby power input terminal 105 is connected to the standby power, the NMOS tube is turned on, then the control terminal of the switch module 102 is pulled low, and the control terminal of the switch module 102 receives a low-level signal. When the standby power input terminal 105 is not connected to the standby power, for example, when the standby power input terminal 105 is suspended, the NMOS tube is turned off, and the control terminal of the switch module 102 receives a high-level signal sent by the working power input terminal 104.

[0073] In the embodiment of the present application, since the third transistor 1031 is an N-channel MOS tube, the control electrode of the third transistor 1031 is the gate of the N-channel MOS tube, the first electrode of the third transistor 1031 is the source of the N-channel MOS tube, and the second electrode of the third transistor 1031 is the drain of the N-channel MOS tube. When the standby power input terminal 105 is connected to the standby power supply, the gate of the N-channel MOS tube can receive a high-level signal, and the N-channel MOS tube is turned on, so that the control end of the switch module 102 is pulled down, and the switch module 102 receives a low-level signal. When the N-channel MOS tube is cut off, when the working power input terminal 104 is connected to the working power supply, a high-level signal can be sent to the control end of the switch module 102. In this way, the third transistor 1031 can adaptively switch the control signal sent to the switch module 102 according to whether the standby power input terminal 105 is connected to the standby power supply, which can improve the practicality of the power supply circuit 10 of the embodiment of the present application.

[0074] In the embodiment of the present application, since the control electrode of the third transistor 1031 is electrically connected to the standby power input terminal 105 and the ground terminal respectively, whether the standby power input terminal 105 is connected to the standby power can control whether the third transistor 1031 is turned on. Since the first electrode of the third transistor 1031 is electrically connected to the working power input terminal 104 and the control terminal of the switch module 102 respectively, and the second electrode of the third transistor 1031 is grounded, when the third transistor 1031 is turned on, the switch module 102 can receive a high-level signal sent by the working power input terminal 104, and when the third transistor 1031 is not turned on, the control terminal of the switch module 102 is pulled down, and the control terminal of the switch module 102 receives a low-level signal. In this way, for different mode power supplies, the third transistor 1031 can adaptively send different control signals to the control terminal of the switch module 102, thereby controlling the switch module 102 to perform switch gating control and switch the power supply connected to the standby power output terminal 107. Therefore, it can be compatible with supporting multiple mode power supplies to power the mainboard, avoiding the problem of device damage caused by multiple welding.

[0075] Optionally, the power supply circuit 10 further includes a first filtering module 108 and a second filtering module 109;

[0076] The first filter module 108 is electrically connected to the first output terminal 1011 of the voltage conversion module 101 and the first input terminal 1021 of the switch module 102 respectively;

[0077] The second filter module 109 is electrically connected to the standby power input terminal 105 and the second input terminal 1022 of the switch module 102 , respectively.

[0078] In the embodiment of the present application, input filter circuits can be respectively arranged between the working power input terminal 104 and the switch module 102, and between the standby power input terminal 105 and the switch module 102, so as to filter out interference signals introduced by the input power. Specifically, in the first path, the first filter module 108 can be arranged between the first output terminal 1011 of the voltage conversion module 101 and the first input terminal 1021 of the switch module 102 to filter the interference signals introduced by the working power. In the second path, the second filter module 109 can be arranged between the standby power input terminal 105 and the second input terminal 1022 of the switch module 102 to filter the interference signals introduced by the standby power.

[0079] In a specific embodiment, the first filter module 108 and / or the second filter module 109 can be composed of capacitors. The first filter module 108 can include a first capacitor component, the first end of the first capacitor component is electrically connected to the first output terminal 1011 of the voltage conversion module 101 and the first input terminal 1021 of the switch module 102, and the second end of the first capacitor component can be grounded. The second filter module 109 can include a second capacitor component, the first end of the second capacitor component is electrically connected to the standby power input terminal 105 and the second input terminal 1022 of the switch module 102, and the second end of the second capacitor component can be grounded. Among them, the capacitor can filter out interference signals and can also provide energy storage to reduce power supply fluctuations caused by current changes.

[0080] In the embodiment of the present application, since the first filter module 108 is electrically connected to the first output terminal 1011 of the voltage conversion module 101 and the first input terminal 1021 of the switch module 102, the first filter module 108 filters the standby power supply voltage obtained by the voltage conversion module 101, filters out interference signals and reduces power supply fluctuations. Since the second filter module 109 is electrically connected to the standby power supply input terminal 105 and the second input terminal 1022 of the switch module 102, the second filter module 109 filters the standby power supply voltage input from the standby power supply input terminal 105, filters out interference signals and reduces power supply fluctuations. Therefore, the quality of the power supply voltage output by the power supply circuit 10 can be improved by the first filter module 108 and the second filter module 109.

[0081] Optionally, the power supply circuit 10 further includes a third filtering module 110;

[0082] The third filter module 110 is electrically connected to the output end of the switch module 102 and the standby power output end 107 , respectively.

[0083] In the embodiment of the present application, an output filter circuit may be provided between the switch module 102 and the standby power supply output terminal 107. Specifically, the third filter module 110 may include a third capacitor component, a first end of the third capacitor component is electrically connected to the output terminal of the switch module 102 and the standby power supply output terminal 107, respectively, and a second end of the third capacitor component may be grounded. The third capacitor component may filter out interference signals and reduce power supply fluctuations.

[0084] In the embodiment of the present application, since the third filter module 110 is electrically connected to the output end of the switch module 102 and the standby power output end 107 respectively, the third filter module 110 filters the standby power voltage output by the standby power output end 107, filters out interference signals and reduces power fluctuations, thereby improving power quality.

[0085] Optionally, the voltage conversion module 101 further includes: a first voltage conversion unit 1013, an input filtering unit 1014 and an output filtering unit 1015;

[0086] The input end of the first voltage conversion unit 1013 is electrically connected to the working power input end 104 and the input filter unit 1014 respectively, and the output end of the first voltage conversion unit 1013 is electrically connected to the first output end 1011 and the output filter unit 1015 respectively.

[0087] In the embodiment of the present application, the working power voltage of the working power input connected to the working power input terminal 104 can be converted by the first voltage conversion unit 1013 to obtain the standby power voltage required by the mainboard. The input filter unit 1014 and the output filter unit 1015 can be composed of capacitors, which can filter out interference signals and reduce power fluctuations, thereby improving the quality of the standby power voltage output by the first voltage conversion unit 1013 to the switch module 102 through the first output terminal 1011.

[0088] Reference Figure 3, shows a circuit connection diagram of a first voltage conversion unit 1013 provided in an embodiment of the present application. The first voltage conversion unit 1013 may be a direct current-to-direct current (DC-DC) power supply chip. The input terminal VIN of the DC-DC power supply chip is electrically connected to the working power supply input terminal 104, and can receive the working power supply voltage VCC_12V. VCC_12V controls the enable pin (EN) of the DC-DC power supply chip after voltage division by resistors R5 and R6. When the VCC_12V power supply input is valid, the output terminal VOUT of the DC-DC power supply chip can output the standby power supply voltage P5V through the first output terminal 1011 of the voltage conversion module 101. An input filter unit 1014 is also connected between the working power supply input terminal 104 and the input terminal VIN of the DC-DC power supply chip. The input filter unit 1014 includes capacitors C13, C14, C15 and C16 connected in parallel. An output filter unit 1015 is also connected between the output terminal VOUT of the DC-DC power supply chip and the first output terminal 1011 of the voltage conversion module 101 . The output filter unit 1015 includes capacitors C9 , C10 , C11 and C12 connected in parallel.

[0089] In the embodiment of the present application, the voltage conversion module 101 may further include a second voltage conversion unit 1016. Figure 4 As shown, the second voltage conversion unit 1016 can be a DC-DC power supply chip. The input end of the second voltage conversion unit 1016 is electrically connected to the working power input end 104, and can receive the working power voltage VCC_12V input by the working power input end 104. The working power voltage input by the working power input end 104 can be converted by the second voltage conversion unit 1016 to obtain various power supply voltages required by the working power domain of the mainboard. The output end of the second voltage conversion unit 1016 is electrically connected to the second output end 1012 of the voltage conversion module 101, and the converted working power voltage can be output through the second output end 1012 to power each module in the working power domain of the mainboard. In addition, the input end and the output end of the second voltage conversion unit 1016 can be connected to a capacitor filter circuit respectively. For example Figure 4 The input end of the second voltage conversion unit 1016 is connected to capacitors C21, C22, C23 and C24 connected in parallel, and the output end of the second voltage conversion unit 1016 is connected to capacitors C17, C18, C19 and C20 connected in parallel. The input signal and output signal of the second voltage conversion unit 1016 can be filtered by the capacitor filtering circuit to improve the quality of the working power supply voltage.

[0090] like Figure 2As shown, the third transistor 1031 in the control module 103 is an NMOS tube Q2, and the control module 103 also includes resistors R1, R2 and R4. The standby power supply voltage VCC_5V_SBY inputted by the standby power supply input terminal 105 is transmitted to the gate (G) of the NMOS through the resistors R2 and R4. The drain (D) of the NMOS tube Q2 is grounded, and the source (S) of the NMOS tube Q2 is connected to the pull-up resistor R1 to the working power supply input terminal 104. The source (S) of the NMOS tube Q2 is also connected to the control end of the switch module 102 through the resistor R3. The control end of the switch module 102 is the gate (G) commonly connected to the NMOS tube Q1 and the PMOS tube Q3. The control module 103 realizes switch gating control by sending a high level signal or a low level signal to the switch module 102.

[0091] like Figure 2 As shown, the first transistor 1023 in the switch module 102 is an NMOS tube Q1, the second transistor 1024 is a PMOS tube Q3, and the switch module 102 also includes a resistor R3 and a capacitor C2, and the capacitor C2 plays a filtering role. The gates (G) of the two MOS tubes are connected in common and connected to the output end of the control module 103 through the resistor R3, and the control module 103 can control two MOS tubes at the same time. The source (S) of the NMOS tube Q1 is connected to the first output end 1011 of the voltage conversion module 101 and the first filter module 108 through the first input end 1021 of the switch module 102, and can receive the standby power supply voltage P5V output by the voltage conversion module 101. The drain (D) of the NMOS tube Q1 is connected to the standby power supply output end 107 through the third filter module 110, and can output a 5V standby power supply voltage P5V_STBY.

[0092] like Figure 2 As shown, the drain (D) of the PMOS tube Q3 is connected to the standby power input terminal 105 and the second filter module 109 through the second input terminal 1022 of the switch module 102, and can receive the standby power voltage VCC_5V_SBY input by the standby power supply. The source (S) of the PMOS tube Q3 is connected to the standby power output terminal 107 through the third filter module 110, and can output a 5V standby power voltage P5V_STBY. When the NMOS tube Q1 is turned on, P5V supplies power to P5V_STBY, and after the PMOS tube Q3 is turned on, VCC_5V_SBY supplies power to P5V_STBY. In addition, the standby power voltage P5V_STBY output by the power supply circuit 10 can supply power to the standby power domain after passing through the onboard power chip of the mainboard, and the P5V power output by the voltage conversion module can also supply power to other modules of the mainboard.

[0093] For example, when the power supply of the mainboard is an ATX power supply, VCC_5V_SBY is powered on and controls the PMOS tube Q3 path of the switch module 102 to be turned on, and the standby power supply voltage P5V_STBY required by the mainboard is powered by the VCC_5V_SBY input of the standby power supply. When the power supply of the mainboard is an AT power supply, VCC_12V is powered on and controls the NMOS tube Q1 path of the switch module 102 to be turned on, and the standby power supply voltage P5V_STBY required by the mainboard is powered by P5V obtained by converting VCC_12V by the voltage conversion module 101.

[0094] The embodiment of the present application further provides a mainboard, comprising: a connector 20 , and the power supply circuit 10 as described in the above embodiment; the power supply circuit 10 is electrically connected to the connector 20 .

[0095] In the embodiment of the present application, the mainboard can be connected to the power supply on the baseboard through the connector 20, and the power supply circuit 10 can be compatible with the power supply of multiple modes of the baseboard. The connector 20 transmits the power supply voltage of the power supply on the baseboard to the power supply circuit 10, and the power supply circuit 10 can generate the working power supply voltage and standby power supply voltage required by the mainboard, and output the working power supply voltage and standby power supply voltage to each power-consuming module of the mainboard. For example, the COMe module is connected to the ATX power supply or AT power supply on the COMe baseboard through the COMe connector 20, and the power supply circuit 10 can be compatible with supporting the ATX power supply and the AT power supply to supply power to the COMe module.

[0096] Optionally, the connector 20 includes a working power pin 201 and a standby power pin 202;

[0097] In the case where the mainboard has a suspend function, the working power input terminal 104 of the power supply circuit 10 is electrically connected to the working power pin 201 of the connector 20, and the standby power input terminal 105 of the power supply circuit 10 is electrically connected to the standby power pin 202 of the connector 20;

[0098] In the case that the mainboard does not have the suspend function, the working power input terminal 104 is electrically connected to the working power pin 201, and the standby power input terminal 105 and the standby power pin 202 are suspended.

[0099] In the embodiment of the present application, the working power pin 201 of the connector 20 is used to connect to the working power input terminal 104 of the power supply circuit 10, and the connector 20 can input the working power voltage transmitted by the power supply on the bottom board into the power supply circuit 10. The standby power pin 202 of the connector 20 is used to connect to the standby power input terminal 105 of the power supply circuit 10, and the connector 20 can input the standby power voltage transmitted by the power supply on the bottom board into the power supply circuit 10.

[0100] For example, the COMe connector includes a working power pin VCC_12V and a standby power pin VCC_5V_SBY, VCC_12V is a normal working power pin, and VCC_5V_SBY is a 5V standby power pin. The power supply voltage required by the COMe module can be generated by VCC_12V and VCC_5V_SBY via a power chip.

[0101] In the embodiment of the present application, the suspend function may include standby to memory, standby to hard disk, key wake-up, Universal Serial Bus (USB) wake-up, network wake-up, etc. This is only an example, and the embodiment of the present application does not limit this. Figure 5 As shown, when the mainboard has a suspend function, the working power input terminal 104 of the power supply circuit 10 is electrically connected to the working power pin 201 of the connector 20, and the standby power input terminal 105 of the power supply circuit 10 is electrically connected to the standby power pin 202 of the connector 20. The baseboard can be powered by the first mode power supply. The working power pin 201 of the connector 20 is also electrically connected to the working power of the first mode power supply, and the standby power pin 202 of the connector 20 is also electrically connected to the standby power of the first mode power supply, that is, the connector 20 is connected to the working power supply and the standby power supply at the same time.

[0102] For example, when the COMe module supports the suspend function, the COMe baseboard can be powered by an ATX power supply. The VCC_12V pin of the COMe connector can be connected to the 12V working power supply of the ATX power supply, and the control signal PS_ON# of the ATX power supply can be controlled by the S3n (power status indication signal) of the COMe module. When the COMe module sets the control signal PS_ON# of the ATX power supply to low through the S3n signal, the 12V working power supply of the ATX power supply is powered on, that is, VCC_12V is powered on. The COMe connector can input the VCC_12V working power supply voltage into the working power supply input terminal 104 of the power supply circuit 10, so that the VCC_12V working power supply voltage passes through the voltage conversion module 101 and the working power supply output terminal 106 to supply power to the working power domain of the COMe module.

[0103] In addition, the VCC_5V_SBY pin of the COMe connector can be connected to the 5V standby power supply of the ATX power supply. When the ATX power supply is connected to the AC input power supply, the 5V standby power supply of the ATX power supply can be output normally, that is, VCC_5V_SBY is powered on. When the COMe module starts the suspend function and enters the standby state, the COMe module can set the control signal PS_ON# of the ATX power supply high through the S3n signal to turn off the VCC_12V working power supply of the ATX power supply. The COMe connector can input the VCC_5V_SBY standby power supply voltage to the standby power input terminal 105 of the power supply circuit 10, so that the VCC_5V_SBY standby power supply voltage passes through the switch module 102 and the standby power output terminal 107 to supply power to the standby power domain of the COMe module. The COMe module can be awakened from the standby state through the power button, USB, network, etc. The COMe module can set the control signal PS_ON# of the ATX power supply low through the S3n signal to restore the output of the VCC_12V working power supply of the ATX power supply.

[0104] In the present application embodiment, Figure 6 As shown, when the mainboard does not have a suspend function, the working power input terminal 104 is electrically connected to the working power pin 201, and the standby power input terminal 105 and the standby power pin 202 are suspended. The bottom board can be powered by the second mode power supply. The working power pin 201 of the connector 20 is also electrically connected to the working power of the second mode power supply, and the standby power pin 202 of the connector 20 is suspended, that is, the connector 20 is only connected to the working power supply.

[0105] For example, when the COMe module does not support the suspend function, the VCC_5V_SBY pin of the COMe connector should be left floating. At this time, only the VCC_12V pin of the COMe connector needs to be connected to the working power supply for single 12V power supply. The COMe baseboard can be powered by AT power supply, or ATX power supply, but the ATX power supply needs to be converted to AT power supply by keeping its control signal PS_ON# low.

[0106] Figure 7 It is a circuit diagram of a method of modifying a soldering device in a related art, such as Figure 7 As shown in the figure, FB1 and FB2 are ferrite beads (FB), which can play an anti-interference role, capacitors C3 and C4 can filter the power supply voltage, and circuit breaker CD1 has dual tripping protection functions of overload and short circuit. The existing circuit can be changed by welding the device to make FB2 suspended (NC), thereby switching the standby power input from P5V to VCC_5V_SBY. The welding device change method is easy to cause confusion in materials and welding status, and multiple welding is easy to damage the device, reducing the service life of the motherboard.

[0107] In summary, the embodiment of the present application provides a power supply circuit and a motherboard, which can support multiple modes of power supply to power the motherboard without changing the hardware state, for example, it can support ATX power supply and AT power supply to power the COMe module, which can be suitable for different application requirements and expand the application scenarios of the motherboard. Compared with the existing method of welding components, it does not require multiple welding, so it is more convenient for production management, can reduce costs, can avoid the problem of component damage due to multiple welding, and can increase the service life of the motherboard.

[0108] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0109] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the present application.

[0110] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0111] The above is a detailed introduction to the one provided by the present application. Specific examples are used in this article to illustrate the principle and implementation method of the present application. The description of the above embodiments is only used to help understand the core idea of ​​the present application. At the same time, for general technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A power supply circuit (10), characterized in that: include: A voltage conversion module (101), a switch module (102), a control module (103), a working power input terminal (104), a standby power input terminal (105), a working power output terminal (106), and a standby power output terminal (107); The input end of the voltage conversion module (101) is electrically connected to the working power input end (104), the first output end (1011) of the voltage conversion module (101) is electrically connected to the first input end (1021) of the switch module (102), and the second output end (1012) of the voltage conversion module (101) is also electrically connected to the working power output end (106); The second input end (1022) of the switch module (102) is electrically connected to the standby power input end (105), and the output end of the switch module (102) is electrically connected to the standby power output end (107); The control end of the control module (103) is electrically connected to the standby power input end (105), and the output end of the control module (103) is electrically connected to the control end of the switch module (102).

2. The power supply circuit (10) according to claim 1, characterized in that: The switch module (102) comprises a first transistor (1023) and a second transistor (1024); The control electrode of the first transistor (1023) is electrically connected to the output end of the control module (103), the first electrode of the first transistor (1023) is electrically connected to the first input end (1021) of the switch module (102), and the second electrode of the first transistor (1023) is electrically connected to the standby power supply output end (107); The control electrode of the second transistor (1024) is electrically connected to the output end of the control module (103), the first electrode of the second transistor (1024) is electrically connected to the second input end (1022) of the switch module (102), and the second electrode of the second transistor (1024) is electrically connected to the standby power supply output end (107).

3. The power supply circuit (10) according to claim 2, characterized in that: The first transistor (1023) is an N-channel MOS transistor, the control electrode of the first transistor (1023) is the gate of the N-channel MOS transistor, the first electrode of the first transistor (1023) is the source of the N-channel MOS transistor, and the second electrode of the first transistor (1023) is the drain of the N-channel MOS transistor.

4. The power supply circuit (10) according to claim 2, characterized in that: The second transistor (1024) is a P-channel MOS tube, the control electrode of the second transistor (1024) is the gate electrode of the P-channel MOS tube, the first electrode of the second transistor (1024) is the drain electrode of the P-channel MOS tube, and the second electrode of the second transistor (1024) is the source electrode of the P-channel MOS tube.

5. The power supply circuit (10) according to any one of claims 2 to 4, characterized in that: The first transistor (1023) and / or the second transistor (1024) is a power MOS transistor.

6. The power supply circuit (10) according to any one of claims 1 to 4, characterized in that: The control module (103) comprises a third transistor (1031); The control electrode of the third transistor (1031) is electrically connected to the standby power input terminal (105) and the ground terminal respectively, the first electrode of the third transistor (1031) is electrically connected to the working power input terminal (104) and the control terminal of the switch module (102) respectively, and the second electrode of the third transistor (1031) is grounded.

7. The power supply circuit (10) according to claim 6, characterized in that: The third transistor (1031) is an N-channel MOS transistor, the control electrode of the third transistor (1031) is the gate electrode of the N-channel MOS transistor, the first electrode of the third transistor (1031) is the source electrode of the N-channel MOS transistor, and the second electrode of the third transistor (1031) is the drain electrode of the N-channel MOS transistor.

8. The power supply circuit (10) according to any one of claims 1 to 4, characterized in that: The power supply circuit (10) further comprises a first filtering module (108) and a second filtering module (109); The first filter module (108) is electrically connected to the first output end (1011) of the voltage conversion module (101) and the first input end (1021) of the switch module (102), respectively; The second filter module (109) is electrically connected to the standby power input terminal (105) and the second input terminal (1022) of the switch module (102), respectively.

9. The power supply circuit (10) according to any one of claims 1 to 4, characterized in that: The power supply circuit (10) further comprises a third filtering module (110); The third filter module (110) is electrically connected to the output end of the switch module (102) and the standby power supply output end (107) respectively.

10. The power supply circuit (10) according to any one of claims 1 to 4, characterized in that: The voltage conversion module (101) further comprises: a first voltage conversion unit (1013), an input filtering unit (1014) and an output filtering unit (1015); The input end of the first voltage conversion unit (1013) is electrically connected to the working power input end (104) and the input filter unit (1014), respectively, and the output end of the first voltage conversion unit (1013) is electrically connected to the first output end (1011) and the output filter unit (1015), respectively.

11. A motherboard, characterized in that: include: A connector (20), and a power supply circuit (10) according to any one of claims 1 to 10; The power supply circuit (10) is electrically connected to the connector (20).

12. The mainboard according to claim 11, characterized in that: The connector (20) comprises a working power pin (201) and a standby power pin (202); When the mainboard has a suspend function, the working power input terminal (104) of the power supply circuit (10) is electrically connected to the working power pin (201) of the connector (20), and the standby power input terminal (105) of the power supply circuit (10) is electrically connected to the standby power pin (202) of the connector (20); When the mainboard does not have the suspend function, the working power input terminal (104) is electrically connected to the working power pin (201), and the standby power input terminal (105) and the standby power pin (202) are suspended.

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