Multi-module board card power supply system

Abstract

The invention provides a multi-module board card power supply system, and belongs to the technical field of power supply. The multi-module board card power supply system comprises a mainboard module and a daughter board module, the mainboard module comprises a power supply switching unit and a buck-boost power supply conversion unit, and the daughter board module comprises a configuration unit; the daughter board module sets a configuration signal corresponding to the daughter board module through a configuration unit, wherein the configuration signal comprises an enable signal and a power supply configuration signal; the mainboard module obtains a configuration signal corresponding to the daughter board module through a configuration unit of the daughter board module, the power supply switching unit switches an output circuit under the action of an enable signal, and the buck-boost power supply conversion unit generates a target output voltage under the action of the enable signal and a power configuration signal. And the corresponding target output voltage is output to the daughter board module through the power supply switching unit. According to the invention, the circuit of the daughter board module can be simplified, so that the production cost of the daughter board module is reduced, and the self-adaptability of the multi-module board card power supply system can be improved.

Description

Technical Field

[0001] The present application relates to the field of power supply technology, and in particular to a multi-module board power supply system. Background Art

[0002] In recent years, with the rapid development of electronic technology, users have higher and higher performance requirements for electronic equipment. At present, a large number of electronic products rely on functional modular design and development. Although electronic products in the same series have a variety of different specifications, the functions of these models are basically the same. Therefore, electronic products in the same series often use the same functional baseboard to be compatible with multiple optional power-differentiated daughter board modules to quickly realize the innovation of electronic products.

[0003] In the related art, the highest power supply voltage is generally selected from multiple sub-board modules of different powers compatible with the same functional baseboard as the compatible power supply voltage. A corresponding DC-DC conversion circuit and a linear voltage regulator circuit are built in each sub-board module. Each sub-board module obtains the power supply voltage required by each sub-board module from the functional baseboard via the internal DC-DC conversion circuit and linear voltage regulator circuit.

[0004] However, when the power supply compatibility of multiple module boards is achieved based on the relevant technology, there is a problem of complex circuits of the daughter board modules, which will further lead to excessively high production costs of the daughter board modules. Summary of the invention

[0005] The purpose of the present application is to provide a multi-module board power supply system, which can simplify the circuit of the daughter board module to reduce the production cost of the daughter board module, and can also improve the adaptability of the multi-module board power supply system.

[0006] The embodiment of the present application is implemented as follows:

[0007] In a first aspect of an embodiment of the present application, a multi-module board power supply system is provided, the multi-module board power supply system comprising: a main board module and a daughter board module, the main board module comprising: a power supply switching unit and a buck-boost power conversion unit, the daughter board module comprising: a configuration unit;

[0008] The daughter board module is detachably plugged into the main board module, so that the configuration unit in the daughter board module is connected to the control end of the power supply switching unit in the main board module and the enable end and feedback end of the buck-boost power conversion unit;

[0009] The output end of the step-up / step-down power conversion unit is connected to the second input end of the power supply switching unit, and the first input end of the power supply switching unit is used to access the system voltage;

[0010] The sub-board module sets the configuration signal corresponding to the sub-board module via the configuration unit, and the configuration signal includes: an enable signal and a power configuration signal;

[0011] The main board module obtains the configuration signal corresponding to the daughter board module through the configuration unit of the daughter board module. The power supply switching unit switches the output circuit under the action of the enable signal. The buck-boost power conversion unit generates a target output voltage under the action of the enable signal and the power configuration signal, and outputs the corresponding target output voltage to the daughter board module through the power supply switching unit.

[0012] As a possible implementation, the power supply switching unit includes: a first resistor, a first transistor, a diode and a relay;

[0013] One end of the first resistor is connected to the configuration unit in the sub-board module, the other end of the first resistor is connected to the base of the first transistor, the collector of the first transistor is respectively connected to the fourth end of the relay and the input end of the diode, the output end of the diode, the fifth end of the relay and the second end of the relay are all used to access the system voltage, the first end of the single-pole double-throw switch is connected to the output end of the buck-boost power conversion unit to access the target output voltage generated by the buck-boost power conversion unit, the third end of the relay is connected to the input end of the sub-board module, and the emitter of the first transistor is grounded.

[0014] As a possible implementation, the power supply switching unit further includes: a first capacitor, a second capacitor, a third capacitor, a second resistor and an electronic switch chip;

[0015] The enable end of the electronic switch chip is connected to the configuration unit of the daughter board module, the communication port of the electronic switch chip is grounded via the third capacitor, the input end of the electronic switch chip is used to access the system voltage, the input end of the electronic switch chip is grounded via the first capacitor, the output end of the electronic switch chip is connected to the input end of the daughter board module, the output end of the electronic switch chip is grounded via the second capacitor, and the local management interface of the electronic switch chip is grounded via the second resistor.

[0016] As a possible implementation, the electronic switch chip includes: a third resistor, a fourth resistor, and an N-type metal oxide semiconductor transistor;

[0017] The input end of the electronic switch chip is connected to the enable end of the electronic switch chip via the third resistor, the enable end of the electronic switch chip is grounded via the fourth resistor, the input end of the electronic switch chip is also connected to the drain of the N-type metal oxide semiconductor transistor, the output end of the electronic switch chip is respectively connected to the source of the N-type metal oxide semiconductor transistor and the input end of the sub-board module, and the gate of the N-type metal oxide semiconductor transistor is connected to the configuration unit of the sub-board module via the enable end of the electronic switch chip.

[0018] As a possible implementation, the buck-boost power conversion unit includes: an enabling driving circuit, a power chip, and a feedback circuit;

[0019] The enable terminal of the power chip is connected to the configuration unit of the daughter board module via the enable drive circuit to obtain an enable signal;

[0020] The feedback end of the power chip is connected to the configuration unit of the daughter board module to obtain a power configuration signal;

[0021] The output end of the power chip is connected to the feedback end of the power chip via the feedback circuit, and the output end of the power chip is also connected to the input end of the power supply switching unit. The power chip is used to generate a target output voltage under the action of an enable signal and a power configuration signal, and output the target output voltage to the power supply switching unit.

[0022] As a possible implementation, the enabling driving circuit includes: a fifth resistor, a sixth resistor, a seventh resistor, a second triode and an eighth resistor;

[0023] One end of the fifth resistor is connected to the configuration unit of the sub-board module, and one end of the fifth resistor is also connected to one end of the sixth resistor and one end of the seventh resistor. The other end of the sixth resistor is used to access the system voltage. The other end of the fifth resistor is connected to the base of the second transistor, and the collector of the second transistor is connected to the enable end of the power chip via the eighth resistor. The emitter of the second transistor and the other end of the seventh resistor are both grounded.

[0024] As a possible implementation, the feedback circuit includes: a ninth resistor, a tenth resistor, and a fourth capacitor;

[0025] One end of the ninth resistor is connected to the output end of the power supply chip, the other end of the ninth resistor is respectively connected to the feedback end of the power supply chip and one end of the tenth resistor, one end of the ninth resistor is also connected to one end of the fourth capacitor, the other end of the ninth resistor and the other end of the fourth capacitor are both connected to the configuration unit of the sub-board module, and the other end of the tenth resistor is grounded.

[0026] As a possible implementation, the buck-boost power conversion unit further includes: an output circuit, the output circuit including: an inductor, a fifth capacitor, a sixth capacitor, and a seventh capacitor;

[0027] The output end of the power chip is connected to one end of the inductor, the other end of the inductor is connected to one end of the fifth capacitor, one end of the sixth capacitor, one end of the seventh capacitor and the input end of the sub-board module, and the other end of the fifth capacitor, the other end of the sixth capacitor and the other end of the seventh capacitor are all grounded.

[0028] As a possible implementation, the configuration unit includes: a first configuration circuit and a second configuration circuit;

[0029] The daughter board module sets an enable signal of the daughter board module via the first configuration circuit, and the daughter board module sets a power configuration signal of the daughter board module via the second configuration circuit.

[0030] As a possible implementation, the first configuration circuit includes: an eleventh resistor, and the second configuration circuit includes: a twelfth resistor;

[0031] When the twelfth resistor is grounded, the enable signal of the daughter board module is at a low level, the buck-boost power conversion unit generates a target output voltage corresponding to the daughter board module according to the resistance value of the eleventh resistor under the action of the low level, the power supply switching unit switches to the output circuit with the second input terminal turned on under the action of the low level, and the power supply switching unit outputs the target output voltage to the daughter board module;

[0032] When the twelfth resistor is unconnected, the enable level of the daughter board module is high, the buck-boost power conversion unit stops running under the action of the high level, the power supply switching unit switches to the output circuit with the first input terminal turned on under the action of the high level, and the power supply switching unit outputs the system voltage to the daughter board module.

[0033] The beneficial effects of the embodiments of the present application include:

[0034] A multi-module board power supply system provided in an embodiment of the present application sets a configuration signal corresponding to a daughter board module through a configuration unit of the daughter board module, and plugs the daughter board module into the main board module through a common interface between each daughter board module and the main board module. The control end of the power supply switching unit in the main board module and the enable end and feedback end of the buck-boost power conversion unit are connected to the configuration unit of the daughter board module via the common interface. Among them, the mainboard module reads the configuration signal of the daughter board module from the configuration unit in the daughter board module currently plugged into the mainboard module via a common interface, and the configuration signal of the daughter board module includes: an enable signal and a power configuration signal; the power supply switching unit in the mainboard module switches the output circuit under the action of the enable signal of the daughter board module; the buck-boost power conversion unit in the mainboard module enables driving or disables standby under the action of the enable signal of the daughter board module, and when the buck-boost power conversion unit enables driving, the corresponding target output voltage of the daughter board module is automatically obtained according to the power configuration signal of the daughter board module, and the target output voltage is transmitted to the power supply input end of the daughter board module via the power supply switching unit; on the contrary, when the buck-boost power conversion unit is disabled and in standby, the power supply switching unit transmits the system voltage provided by the multi-module board power supply system to the power supply input end of the daughter board module. In addition, the buck-boost power conversion unit is deployed in the mainboard module, so that the mainboard module can be compatible with the power supply of a variety of daughter board modules with different powers, and the internal circuit structure of the daughter board module can also be simplified, thereby reducing the production cost of each daughter board module. In this way, the circuit of the daughter board module can be simplified to reduce the production cost of the daughter board module, and the adaptability of the power supply system of the multi-module board can also be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 A system block diagram of a multi-module board power supply system provided in an embodiment of the present application;

[0037] Figure 2 A schematic diagram of the structure of a first multi-module board power supply system provided in an embodiment of the present application;

[0038] Figure 3 A schematic diagram of the structure of a power supply switching unit provided in an embodiment of the present application;

[0039] Figure 4 A schematic diagram of the structure of another power supply switching unit provided in an embodiment of the present application;

[0040] Figure 5 An equivalent schematic diagram of the internal circuit of an electronic switch chip semiconductor provided in an embodiment of the present application;

[0041] Figure 6 A structural block diagram of a buck-boost power conversion unit provided in an embodiment of the present application;

[0042] Figure 7 A schematic diagram of the structure of a buck-boost power conversion unit provided in an embodiment of the present application;

[0043] Figure 8 A schematic diagram of internal function conversion of a power chip semiconductor provided in an embodiment of the present application;

[0044] Fig. 9 A schematic diagram of the structure of a sub-board module provided in an embodiment of the present application.

[0045] Description of the drawings: 10: multi-module board power supply system; 101: mainboard module; 1011: power supply switching unit; 1111: first resistor; 1112: first triode; 1113: diode; 1114: relay; 1121: first capacitor; 1122: second capacitor; 1123: third capacitor; 1124: second resistor; 1125: electronic switch chip; 1251: third resistor; 1252: fourth resistor; 1253: N-type metal oxide semiconductor transistor; 1012: buck-boost power conversion unit; 121: enable drive circuit; 211 : fifth resistor; 212: sixth resistor; 213: seventh resistor; 214: second triode; 215: eighth resistor; 122: power chip; 123: feedback circuit; 231: ninth resistor; 232: tenth resistor; 233: fourth capacitor; 124: output circuit; 241: inductor; 242: fifth capacitor; 243: sixth capacitor; 244: seventh capacitor; 102: daughter board module; 1021: configuration unit; 10211: first configuration circuit; 2111: eleventh resistor; 10212: second configuration circuit; 2121: twelfth resistor. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0047] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0048] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0049] In the description of the present application, it should be noted that the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance. It should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, and it can be the internal connection of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0050] At present, the highest power supply voltage is often selected from multiple sub-board modules of different powers compatible with the same functional baseboard as the compatible power supply voltage of the functional baseboard, and the compatible power supply voltage provided by the functional baseboard is converted into the power supply voltage required by each sub-board module through the DC-DC conversion circuit and linear voltage stabilization circuit built in each sub-board module. However, this solution requires the construction of a DC-DC conversion circuit and a linear voltage stabilization circuit that meet the requirements of each sub-board module in each sub-board module, which makes the circuit of the sub-board module complicated, and further leads to excessively high production costs of the sub-board modules. In addition, the working voltage of some sub-board modules can be directly powered by a voltage of equal potential on the common baseboard, and the common baseboard cannot automatically switch the power supply voltage based on the connected sub-board module, resulting in poor adaptability of the multi-module board power supply system.

[0051] To this end, the embodiment of the present application provides a multi-module board power supply system, by building a power supply switching unit and a buck-boost power conversion unit in the main board module, only the corresponding configuration unit needs to be built in the sub-board module, and the sub-board module sets the configuration signal corresponding to the sub-board module via the built-in configuration unit, and the configuration signal corresponding to the sub-board module includes: an enable signal and a power configuration signal. Among them, the main board module obtains the configuration signal of the sub-board module via the built-in configuration unit in the sub-board module, the power supply switching unit switches the power output circuit under the action of the enable signal of the sub-board module, and the buck-boost power conversion unit generates a target output voltage under the action of the power configuration signal and the enable signal of the sub-board module, and transmits the target output voltage to the sub-board module via the power supply switching unit. In this way, the circuit of the sub-board module can be simplified to reduce the production cost of the sub-board module, and the adaptability of the multi-module board power supply system can also be improved.

[0052] The multi-module board power supply system provided in the embodiment of the present application is explained in detail below with reference to the accompanying drawings.

[0053] Figure 1 A system block diagram of a multi-module board power supply system provided in this application, see Figure 1 The multi-module board power supply system provided in the embodiment of the present application is composed of a mainboard module 101 and multiple daughterboard modules 102, wherein the mainboard module 101 and each daughterboard module 102 share an interface. When the daughterboard module 102 is plugged into the mainboard module 101, the mainboard module 101 obtains the configuration information of the daughterboard module 102, and provides the daughterboard module 102 with a corresponding power supply voltage according to the configuration information of the daughterboard module 102. It is worth noting that the interface shared by the mainboard module 101 and the daughterboard module 102 can be a USB interface or other forms of interfaces, and this application does not make specific restrictions on this.

[0054] It is worth noting that the mainboard module 101 only supplies power to the daughter board module 102 plugged into the mainboard module 101 at a time, but the mainboard module 101 can be compatible with the power supply voltage of each daughter board module 102 in the multi-module board power supply system 10. The mainboard module 101 provides the corresponding power supply voltage to the daughter board module 102 based on the configuration signal corresponding to the daughter board module 102 plugged into the mainboard module 101 at the current moment.

[0055] Optionally, VDD_POWER is used to indicate the system voltage of the mainboard module 101, Vout_Module is used to indicate the voltage output by the mainboard module 101 to the daughterboard module 102, DCDC is used to indicate the buck-boost power conversion unit 1012, VDD_Out is used to indicate the voltage adapted to the daughterboard module 102 calculated by the buck-boost power conversion unit 1012 according to the configuration information of the daughterboard module 102, R1 is used to indicate the sampling resistor, R2 is used to indicate the negative feedback voltage divider resistor, VFB is used to indicate the feedback end of the buck-boost power conversion unit 1012, and SW is used to indicate the power supply. The control element SW in the switching unit 1011 is mainly used to control the conduction and shutdown of the output circuit to control the flow of current and the on-off of the circuit. SW can be implemented by a single-pole double-throw switch, an electronic switch chip, etc., and the present application does not make specific limitations on this; Module_ID is used to indicate the power configuration signal of the sub-board module 102, Module_EN is used to indicate the enable signal of the sub-board module 102, Vin_Module is used to indicate the power input signal of the sub-board module 102, R3 is used to indicate the configuration resistor of the sub-board module 102, and R4 is used to indicate the enable resistor of the sub-board module 102.

[0056] Figure 2 A schematic diagram of a multi-module board power supply system provided in this application, see Figure 2 The embodiment of the present application provides a multi-module board power supply system 10 including: a mainboard module 101 and a daughterboard module 102, the mainboard module 101 includes: a power supply switching unit 1011 and a step-up / step-down power conversion unit 1012, and the daughterboard module 102 includes: a configuration unit 1021.

[0057] Optionally, the mainboard module 101 is used to indicate a common functional baseboard that provides power supply voltage to each daughter board module 102 in the multi-module board power supply system 10, and the daughter board module 102 is used to indicate a module used to perform various functions in an electronic product. The multi-module board power supply system 10 is composed of a mainboard module 101 and multiple daughter board modules 102. The mainboard module 101 can provide a power supply voltage that is adapted to each daughter board module 102, but the mainboard module 101 can only provide a power supply voltage that is adapted to one daughter board module 102 at a time at the current moment.

[0058] Optionally, the power supply switching unit 1011 in the mainboard module 101 is used to switch the output circuit of the mainboard module 101. The power supply switching unit 1011 can be equivalent to a controllable high-power electronic switch. The power supply switching unit 1011 switches the output circuit under the action of the enable signal Module_EN of the daughter board module 102. For example, the power supply switching unit 1011 can be implemented by a single-pole double-throw electronic switch controlled by the Module_EN signal. This application does not make any specific limitations on this.

[0059] Optionally, the step-up / step-down power conversion unit 1012 in the mainboard module 101 is used to output a power supply voltage adapted to the daughterboard module 102 under the action of a configuration signal of the daughterboard module 102 .

[0060] Optionally, the user pre-sets the configuration parameters of the configuration unit 1021 of the daughter board module 102, and the configuration unit 1021 of the daughter board module 102 generates a corresponding configuration signal based on the pre-set configuration parameters. The configuration parameters of the configuration unit 1021 of each daughter board module 102 are determined by the factory configuration of each daughter board module 102, and this application does not make specific restrictions on this. It is worth noting that once the daughter board module 102 is completed after leaving the factory, the configuration parameters of the configuration unit 1021 of the daughter board module 102 will no longer change.

[0061] The daughter board module 102 is detachably plugged into the mother board module 101 so that the configuration unit 1021 in the daughter board module 102 is connected to the control end of the power supply switching unit 1011 in the mother board module 101 and the enable end and feedback end of the buck-boost power conversion unit 1012.

[0062] Optionally, the daughter board module 102 is plugged into the main board module 101 through the shared interface between the daughter board module 102 and the main board module 101, and the main board module 101 obtains the configuration signal of the daughter board module 102 through the shared interface. When the daughter board module 102 is plugged into the main board module 101 through the shared interface, the configuration unit 1021 in the daughter board module 102 is connected to the control end of the power supply switching unit 1011 in the main board module 101 and the enable end and feedback end of the buck-boost power conversion unit 1012.

[0063] It is worth noting that the control end of the power supply switching unit 1011 is used to indicate the control end of the electronic switch in the power supply switching unit 1011, the enable end of the buck-boost power conversion unit 1012 is used to indicate the enable drive port of the buck-boost power conversion unit 1012, and the feedback end of the buck-boost power conversion unit 1012 is used to indicate the negative feedback pin of the buck-boost power conversion unit 1012, which is mainly used to feedback and adjust the voltage output by the buck-boost power conversion unit 1012.

[0064] Optionally, the power supply switching unit 1011 in the mainboard module 101 switches the output circuit under the action of the configuration signal of the daughter board module 102, and the buck-boost power conversion unit 1012 in the mainboard module 101 is enabled to drive and generate a voltage compatible with the daughter board module 102 under the action of the configuration signal of the daughter board module 102.

[0065] The output end of the buck-boost power conversion unit 1012 is connected to the second input end of the power switching unit 1011 , and the first input end of the power switching unit 1011 is used to access the system voltage.

[0066] Optionally, the system voltage is used to indicate the power supply voltage provided by the multi-module board power supply system 10 to the main board module 101, the first input end of the power supply switching unit 1011 is used to access the system voltage, the second input end of the power supply switching unit 1011 is connected to the output end of the buck-boost power conversion unit 1012, and the output end of the power supply switching unit 1011 is connected to the input end of the daughter board module 102. When the output circuit formed between the first input end and the output end of the power supply switching unit 1011 is turned on, the power supply voltage input to the daughter board module 102 by the power supply switching unit 1011 is the system voltage; when the output circuit formed between the second input end and the output end of the power supply switching unit 1011 is turned on, the power supply voltage input to the daughter board module 102 by the power supply switching unit 1011 is the voltage output by the buck-boost power conversion unit 1012.

[0067] It is worth noting that the first input terminal and the second input terminal of the power supply switching unit 1011 cannot be turned on at the same time. In a single power supply between the main board module 101 and the daughter board module 102, only one output circuit is turned on.

[0068] The daughter board module 102 sets the configuration signal corresponding to the daughter board module 102 via the configuration unit 1021 , and the configuration signal includes: an enable signal and a power configuration signal.

[0069] Optionally, the configuration signal is used to indicate the configuration parameter information pre-set during the production process of the sub-board module 102. The user pre-sets the configuration signal of each sub-board module 102 in the configuration unit 1021 in each sub-board module 102. The configuration signal of each sub-board module 102 is used to indicate the power supply requirement of each sub-board module 102.

[0070] Optionally, the configuration signal of each sub-board module 102 includes: an enable signal and a power configuration signal, the enable signal is used to indicate an output circuit corresponding to the sub-board module 102, and the power configuration signal is used to indicate a power supply requirement corresponding to the sub-board module 102.

[0071] The main board module 101 obtains the configuration signal corresponding to the daughter board module 102 through the configuration unit 1021 of the daughter board module 102, the power supply switching unit 1011 switches the output circuit under the action of the enable signal, the buck-boost power conversion unit 1012 enables the drive to generate the target output voltage under the action of the enable signal and the power configuration signal, and outputs the corresponding target output voltage to the daughter board module 102 through the power supply switching unit 1011.

[0072] Optionally, the main board module 101 reads the configuration signal corresponding to each sub-board module via the configuration unit of the sub-board module 102, and the power supply switching unit 1011 switches the corresponding output circuit under the control of the enable signal of the sub-board module 102; the step-up / step-down power conversion unit 1012 enables driving or disables standby under the action of the enable signal of the sub-board module 102, and calculates the configuration voltage corresponding to the sub-board module 102 under the action of the power configuration signal of the sub-board module 102.

[0073] It is worth noting that when the buck-boost power conversion unit 1012 is enabled to drive under the action of the enable signal of the daughter board module 102, the buck-boost power conversion unit 1012 calculates the configuration voltage corresponding to the daughter board module 102 based on the power configuration signal of the daughter board module 102; on the contrary, if the buck-boost power conversion unit 1012 is disabled and in standby under the action of the enable signal of the daughter board module 102, the buck-boost power conversion unit 1012 stops running, and the buck-boost power conversion unit 1012 has no output voltage. Among them, the enable signal that causes the buck-boost power conversion unit 1012 to enable driving will also cause the power supply switching unit 1011 to switch to the output circuit between the second input terminal and the output terminal to be turned on; the enable signal that causes the buck-boost power conversion unit 1012 to disable and standby will also cause the power supply switching unit 1011 to switch to the output circuit between the first input terminal and the output terminal to be turned on.

[0074] Optionally, the target output voltage is used to indicate the power supply voltage calculated according to the power configuration signal of the daughter board module 102 when the buck-boost power conversion unit 1012 is enabled to drive under the action of the enable signal of the daughter board module 102. The buck-boost power conversion unit 1012 transmits the calculated target output voltage to the input end of the daughter board module 102 via the power supply switching unit 1011 to complete the power supply to the daughter board module 102.

[0075] In an embodiment of the present application, the configuration signal corresponding to the sub-board module is set through the configuration unit of the sub-board module, and the sub-board module is plugged into the main board module through the common interface between each sub-board module and the main board module. The control end of the power supply switching unit in the main board module and the enable end and feedback end of the buck-boost power conversion unit are all connected to the configuration unit of the sub-board module via the common interface. Among them, the mainboard module reads the configuration signal of the daughter board module from the configuration unit in the daughter board module currently plugged into the mainboard module via a common interface, and the configuration signal of the daughter board module includes: an enable signal and a power configuration signal; the power supply switching unit in the mainboard module switches the output circuit under the action of the enable signal of the daughter board module; the buck-boost power conversion unit in the mainboard module enables driving or disables standby under the action of the enable signal of the daughter board module, and when the buck-boost power conversion unit enables driving, the corresponding target output voltage of the daughter board module is automatically obtained according to the power configuration signal of the daughter board module, and the target output voltage is transmitted to the power supply input end of the daughter board module via the power supply switching unit; on the contrary, when the buck-boost power conversion unit is disabled and in standby, the power supply switching unit transmits the system voltage provided by the multi-module board power supply system to the power supply input end of the daughter board module. In addition, the buck-boost power conversion unit is deployed in the mainboard module, so that the mainboard module can be compatible with the power supply of a variety of daughter board modules with different powers, and the internal circuit structure of the daughter board module can also be simplified, thereby reducing the production cost of each daughter board module. In this way, the circuit of the daughter board module can be simplified to reduce the production cost of the daughter board module, and the adaptability of the power supply system of the multi-module board can also be improved.

[0076] In an optional embodiment, see Figure 3 A power supply switching unit 1011 in a mainboard module 101 in a multi-module board power supply system 10 provided in an embodiment of the present application includes: a first resistor 1111, a first transistor 1112, a diode 1113 and a relay 1114.

[0077] One end of the first resistor 1111 is connected to the configuration unit 1021 in the sub-board module 102, the other end of the first resistor 1111 is connected to the base of the first transistor 1112, the collector of the first transistor 1112 is respectively connected to the fourth end of the relay 1114 and the input end of the diode 1113, the output end of the diode 1113, the fifth end of the relay 1114 and the second end of the relay 1114 are all used to access the system voltage, the first end of the relay 1114 is connected to the output end of the buck-boost power conversion unit 1012 to access the target output voltage generated by the buck-boost power conversion unit 1012, the third end of the relay 1114 is connected to the input end of the sub-board module 102, and the emitter of the first transistor 1112 is grounded.

[0078] Optionally, the first resistor 1111 is used to sample an enable signal in the configuration unit 1021 in the sub-board module 102. The first resistor 1111 enables and drives the first transistor 1112 to turn on or off based on the sampled enable signal, and is rectified and filtered by the diode 1113. The relay 1114 switches the output circuit under the action of the output signal of the first transistor 1112.

[0079] Optionally, relay 1114 is composed of an electromagnetic coil and a single-pole double-throw switch, wherein the first end of relay 1114 is a normally closed end, the second end of relay 1114 is a normally open end, and the third end of relay 1114 is a common end. When the electromagnetic coil in relay 1114 is energized, the electromagnetic coil generates an electromagnetic field to attract the single-pole double-throw switch, so that the single-pole double-throw switch switches the relay from the normally closed end to the normally open end, thereby realizing the switching of the power supply output circuit.

[0080] It is worth noting that the normally closed end of relay 1114 refers to the end that is closed and conductive by default when relay 1114 is not energized; conversely, when relay 1114 is energized, the electromagnetic coil in relay 1114 generates a magnetic field to attract the contacts of the single-pole double-throw switch, so that relay 1114 switches from the normally closed end to the normally open end, and the normally open end of relay 1114 is conductive to the common end.

[0081] Optionally, when the enable signal Module_EN sampled by the first resistor 1111 is 0, that is, the enable signal of the sub-board module 102 at the current moment is at a low level, the first resistor 1111 controls the first transistor 1112 to be turned on, and the relay 1114 makes VDD_Out and Vout_Module normally closed and turned on under the action of the output signal of the first transistor 1112, and the power supply voltage Vin_Module input by the power supply switching unit 1011 to the sub-board module 102 is VDD_Out, that is, the power supply voltage input by the power supply switching unit 1011 to the sub-board module 102 is the target output voltage VDD_Out output by the buck-boost power conversion unit 1012.

[0082] Optionally, when the enable signal Module_EN=1 sampled by the first resistor 1111, that is, the enable signal of the sub-board module 102 at the current moment is at a high level, the first resistor 1111 controls the first transistor 1112 to turn off, and the relay 1114 makes VDD_POWER and Vout_Module normally open and conductive under the action of the output signal of the first transistor 1112, and the power supply voltage Vin_Module=VDD_POWER input by the power supply switching unit 1011 to the sub-board module 102, that is, the power supply voltage input by the power supply switching unit 1011 to the sub-board module 102 is the system voltage VDD_POWER of the multi-module board power supply system 10.

[0083] Optionally, the relay 1114 is implemented by a high-power single-pole double-throw relay, wherein the high-power single-pole double-throw relay is a high-power electronic fuse protection switch, which can ensure the safety and reliability of the power supply switching unit 1011.

[0084] Optionally, the first resistor 1111 can be implemented by a 150KΩ high-power resistor, but the 150KΩ first resistor 1111 is only used as an example. It does not mean that the first resistor 1111 in the power supply switching unit 1011 can only be 150KΩ, and this application does not make any specific limitation on this.

[0085] In an optional embodiment, see Figure 4 Another power supply switching unit 1011 in the mainboard module 101 in the multi-module board power supply system 10 provided in an embodiment of the present application also includes: a first capacitor 1121, a second capacitor 1122, a third capacitor 1123, a second resistor 1124 and an electronic switch chip 1125.

[0086] Optionally, U1 is used to represent the electronic switch chip 1125, IN is used to represent the input end of the electronic switch chip 1125, EN / UVLO is used to represent the enable end of the electronic switch chip 1125, OUT is used to represent the output end of the electronic switch chip 1125, and ILIM is used to represent the local management interface of the electronic switch chip 1125.

[0087] The enable end of the electronic switch chip 1125 is connected to the configuration unit 1021 of the daughter board module 102, the communication port of the electronic switch chip 1125 is grounded via the third capacitor 1123, the input end of the electronic switch chip 1125 is used to access the system voltage, the input end of the electronic switch chip 1125 is grounded via the first capacitor 1121, the output end of the electronic switch chip 1125 is connected to the input end of the daughter board module 102, the output end of the electronic switch chip 1125 is grounded via the second capacitor 1122, and the local management interface of the electronic switch chip 1125 is grounded via the second resistor 1124.

[0088] Optionally, the enable end of the electronic switch chip 1125 is used to read the enable signal of the sub-board module 102 from the configuration unit 1021 in the sub-board module 102. When the enable signal Module_EN loaded on the enable end of the electronic switch chip 1125 is 0, that is, the enable signal of the sub-board module 102 at the current moment is at a low level, the electronic switch chip 1125 disconnects the output circuit between VDD_POWER and Vout_Module under the drive of the enable signal, and Vout_Module is connected to the output circuit between the buck-boost power conversion unit 1012 by default, and the electronic switch chip 1125 is used to output the target output voltage VDD_Out generated by the buck-boost power conversion unit 1012 to the sub-board module 102, that is, the power supply switching unit 1011 inputs the power supply voltage Vin_Module=VDD_Out to the daughter board module 102; when the enable signal Module_EN=1 loaded on the enable end of the electronic switch chip 1125, that is, when the enable signal of the daughter board module 102 at the current moment is high, the electronic switch chip 1125 turns on the output circuit between VDD_POWER and Vout_Module under the drive of the enable signal, and the electronic switch chip 1125 outputs the system voltage VDD_POWER of the multi-module board power supply system 10 to the daughter board module 102, that is, the power supply switching unit 1011 outputs the system voltage VDD_POWER of the multi-module board power supply system 10 to the daughter board module

[0089] 102 inputs a power supply voltage Vin_Module=VDD_POWER.

[0090] In an optional embodiment, see Figure 5 The electronic switch chip 1125 in the power supply switching unit 1011 in the mainboard module 101 in the multi-module board power supply system 10 provided in the embodiment of the present application includes: a third resistor 1251, a fourth resistor 1252 and an N-type metal oxide semiconductor transistor 1253.

[0091] Optionally, the electronic switch chip 1125 can implement the function of a single-pole double-throw relay via the N-type metal oxide semiconductor transistor 1253 to achieve automatic switching of the output circuit of the power supply switching unit 1011 .

[0092] The input end of the electronic switch chip 1125 is connected to the enable end of the electronic switch chip 1125 via the third resistor 1251, and the enable end of the electronic switch chip 1125 is grounded via the fourth resistor 1252. The input end of the electronic switch chip 1125 is also connected to the drain of the N-type metal oxide semiconductor transistor 1253. The output end of the electronic switch chip 1125 is respectively connected to the source of the N-type metal oxide semiconductor transistor 1253 and the input end of the sub-board module 102, and the gate of the N-type metal oxide semiconductor transistor 1253 is connected to the configuration unit of the sub-board module 102 via the enable end of the electronic switch chip 1125.

[0093] Optionally, the N-type metal oxide semiconductor transistor 1253 is turned on or off under the action of an enable signal sampled by an enable terminal of the electronic switch chip 1125 .

[0094] In an optional implementation, when the enable signal of the daughter board module 102 plugged into the main board module 101 is grounded via a 0Ω resistor, the enable signal of the daughter board module 102 is at a low level, and after being reversed, the control driving step-up / step-down power conversion unit 1012 is enabled to drive, the step-up / step-down power conversion unit 1012 generates a power supply voltage adapted to the daughter board module 102, the output circuit between the second input terminal and the output terminal of the power supply switching unit 1011 is turned on, and the power supply switching unit 1011 transmits the target output voltage generated by the step-up / step-down power conversion unit 1012 to the daughter board module 102; when the enable signal of the daughter board module 102 plugged into the main board module 101 is passed through a 0Ω resistor, the enable signal of the daughter board module 102 is high level, and the enable end of the main board module 101 is connected to the pull-up resistor by default. After reversing, the buck-boost power conversion unit 1012 is controlled to be disabled and standby, the buck-boost power conversion unit 1012 does not work and has no output, and the output circuit between the first input end and the output end of the power supply switching unit 1011 is turned on, and the power supply switching unit 1011 transmits the system voltage provided by the multi-module board power supply system 10 to the daughter board module 102.

[0095] In an optional embodiment, see Figure 6 The step-up / step-down power conversion unit 1012 in the mainboard module 101 in the multi-module board power supply system 10 provided in the embodiment of the present application includes: an enabling driving circuit 121, a power chip 122 and a feedback circuit 123.

[0096] Optionally, the enable drive circuit 121 is used to enable the drive buck-boost power conversion unit 1012, the power chip 122 is used to adjust the output voltage of the buck-boost power conversion unit 1012, and the feedback circuit 123 is used to obtain the power configuration signal of the daughter board module 102 and the actual output voltage of the power chip 122. The power chip 122 adjusts the target output voltage output by the buck-boost power conversion unit 1012 under the action of the feedback signal.

[0097] The enable terminal of the power chip 122 is connected to the configuration unit 1021 of the daughter board module 102 via the enable driving circuit 121 to obtain an enable signal.

[0098] Optionally, the enable end of the power chip 122 obtains the enable signal of the daughter board module 102 from the configuration unit 1021 in the daughter board module 102 via the enable drive circuit 121, so that the power chip 122 starts running or standing by under the action of the enable signal of the daughter board module 102.

[0099] The feedback end of the power chip 122 is connected to the configuration unit 1021 of the daughter board module 102 to obtain a power configuration signal.

[0100] Optionally, the power chip 122 reads a power configuration signal of the daughter board module 102 from the configuration unit 1021 in the daughter board module 102 via a feedback terminal.

[0101] The output end of the power chip 122 is connected to the feedback end of the power chip 122 via the feedback circuit 123. The output end of the power chip 122 is also connected to the input end of the power supply switching unit 1011. The power chip 122 is used to generate a target output voltage under the action of an enable signal and a power configuration signal, and output the target output voltage to the power supply switching unit 1011.

[0102] Optionally, the power chip 122 adjusts the target output voltage of the buck-boost power conversion unit 1012 based on the signal fed back by the feedback circuit 123 , and transmits the target output voltage to the input end of the daughter board module 102 via the power supply switching unit 1011 .

[0103] Optionally, the output voltage of the step-up / step-down power conversion unit 1012 can be calculated according to the following formula (1), which is as follows:

[0104] Vout = Vref × (1 + R1 / R2) (1)

[0105] It is worth mentioning that Vout is used to indicate the initial output voltage of the buck-boost power conversion unit 1012, Vref is used to indicate the voltage set value of the buck-boost power conversion unit 1012, R1 is used to indicate the resistance value of the sampling resistor in the feedback circuit 123 in the buck-boost power conversion unit 1012, and R2 is used to indicate the resistance value of the negative feedback voltage divider resistor in the feedback circuit 123 in the buck-boost power conversion unit 1012.

[0106] In an optional embodiment, see Figure 7 The enabling driving circuit 121 in the buck-boost power conversion unit 1012 in the mainboard module 101 in the multi-module board power supply system 10 provided in the embodiment of the present application includes: a fifth resistor 211, a sixth resistor 212, a seventh resistor 213, a second transistor 214 and an eighth resistor 215.

[0107] One end of the fifth resistor 211 is connected to the configuration unit 1021 of the sub-board module 102, and one end of the fifth resistor 211 is also connected to one end of the sixth resistor 212 and one end of the seventh resistor 213. The other end of the sixth resistor 212 is used to access the system voltage. The other end of the fifth resistor 211 is connected to the base of the second transistor 214, and the collector of the second transistor 214 is connected to the enable end of the power chip 122 via the eighth resistor 215. The emitter of the second transistor 214 and the other end of the seventh resistor 213 are both grounded.

[0108] Optionally, the buck-boost power conversion unit 1012 controls the operating state of the power chip 122 by enabling the driving circuit 121 , and the buck-boost power conversion unit 1012 works or is prohibited from working under the action of the enable signal of the daughter board module 102 .

[0109] In an optional embodiment, see Figure 7 The feedback circuit 123 in the buck-boost power conversion unit 1012 in the mainboard module 101 in the multi-module board power supply system 10 provided in the embodiment of the present application includes: a ninth resistor 231, a tenth resistor 232 and a fourth capacitor 233.

[0110] Optionally, R1 is used to represent the ninth resistor 231, R2 is used to represent the tenth resistor 232, VFB is used to represent the feedback end of the power chip, R1 is used to sample the output voltage VDD_Out of the buck-boost power conversion unit 1012 in real time, R1 transmits the sampled output voltage VDD_Out to R2, R2 transmits the output voltage to the feedback end VFB of the power chip 122, and the power chip 122 feedbacks and regulates the output voltage VDD_Out of the buck-boost power conversion unit 1012 in real time.

[0111] Optionally, the initial setting values ​​of the ninth resistor 231 and the tenth resistor 232 in the general feedback circuit are feedback voltage-dividing resistance values ​​of the minimum conversion output voltage VDD_Out of the buck-boost power conversion unit 1012 .

[0112] Exemplarily, if the minimum conversion output voltage VDD_Out of the buck-boost power conversion unit 1012 is 1V, and the voltage reference Vref of the buck-boost power conversion unit 1012 is 0.6V, then the initial resistance value R1 of the ninth resistor R1 in the buck-boost power conversion unit 1012 is 33.2KΩ, and the initial resistance value R2 of the tenth resistor R2 is 49.9KΩ, then the initial output voltage Vout of the buck-boost power conversion unit 1012 is 0.6×(1+33.2 / 49.9)=1V.

[0113] It is worth noting that the buck-boost power conversion unit 1012 in the mainboard module 101 is enabled and controlled and configured for voltage output by the enable signal of the daughterboard module 102 and the power configuration signal.

[0114] One end of the ninth resistor 231 is connected to the output end of the power chip 122, the other end of the ninth resistor 231 is respectively connected to the feedback end of the power chip 122 and one end of the tenth resistor 232, one end of the ninth resistor 231 is also connected to one end of the fourth capacitor 233, the other end of the ninth resistor 231 and the other end of the fourth capacitor 233 are both connected to the configuration unit 1021 of the sub-board module 102, and the other end of the tenth resistor 232 is grounded.

[0115] Optionally, the power chip 122 is connected to the power configuration signal of the daughter board module 102 via the feedback terminal VFB, which is equivalent to the eleventh resistor 2111 in the first configuration circuit 10211 in the daughter board module 102 and the tenth resistor 232 in the buck-boost power conversion unit 1012 being connected in parallel.

[0116] In an optional embodiment, see Figure 7 The buck-boost power conversion unit 1012 in the mainboard module 101 in the multi-module board power supply system 10 provided in the embodiment of the present application also includes: an output circuit 124, and the output circuit 124 includes: an inductor 241, a fifth capacitor 242, a sixth capacitor 243 and a seventh capacitor 244.

[0117] The output end of the power chip 122 is connected to one end of the inductor 241, the other end of the inductor 241 is connected to one end of the fifth capacitor 242, one end of the sixth capacitor 243, one end of the seventh capacitor 244 and the input end of the sub-board module 102, and the other end of the fifth capacitor 242, the other end of the sixth capacitor 243 and the other end of the seventh capacitor 244 are all grounded.

[0118] Optionally, the output circuit 124 is used to rectify and filter the output voltage of the step-up / step-down power conversion unit 1012 to ensure that the power supply voltage provided by the mainboard module 101 to the sub-board module 102 is stable and reliable.

[0119] Figure 8 A schematic diagram of the structure of a power chip provided in this application, see Figure 8 An embodiment of the present application provides an internal circuit structure of a power chip 122 , in which the power chip 122 operates through an internal circuit to output a configuration voltage that is compatible with a daughter board module 102 plugged into a motherboard module 101 .

[0120] In an optional embodiment, see Fig. 9 The configuration unit 1021 in the daughter board module 102 in the multi-module board power supply system 10 provided in the embodiment of the present application includes: a first configuration circuit 10211 and a second configuration circuit 10212 .

[0121] The daughter board module 102 sets an enable signal of the daughter board module 102 via the first configuration circuit 10211 , and the daughter board module 102 sets a power configuration signal of the daughter board module 102 via the second configuration circuit 10212 .

[0122] In an optional embodiment, see Fig. 9 The first configuration circuit 10211 in the daughter board module 102 in the multi-module board power supply system 10 provided in the embodiment of the present application includes: an eleventh resistor 2111, and the second configuration circuit 10212 includes: a twelfth resistor 2121.

[0123] Optionally, R3 is used to represent the eleventh resistor 2111, R4 is used to represent the twelfth resistor 2121, the enable signal Module_EN of the daughter board module 102 is generated via the selected 0Ω resistor R4 connected to the ground, and the power configuration signal Module_ID of the daughter board module 102 is generated via the resistor R3 connected to the ground.

[0124] Optionally, when the daughter board module 102 is plugged into the main board module 101 via the common interface, the enable signal of the daughter board module 102 automatically controls the working state of the power supply switching unit 1011 and the buck-boost power conversion unit 1012 in the main board module 101. The enable signal of the daughter board module 102 is directly loaded to the enable end of the buck-boost power conversion unit 1012 in the main board module 101, enabling the buck-boost power conversion unit 1012 to enable driving or disable standby; when the enable signal of the daughter board module 102 controls the buck-boost power conversion unit 1012 to enable driving, the feedback voltage divider resistor R2 of the buck-boost power conversion unit 1012 is connected in parallel with the configuration resistor R3 in the daughter board module 102.

[0125] Optionally, the resistance value of the parallel resistor at the feedback end of the buck-boost power conversion unit 1012 when the buck-boost power conversion unit 1012 is running can be calculated according to the following formula (2), and the formula (2) is as follows:

[0126] R23=(R2×R3) / (R2+R3)(2)

[0127] It is worth noting that R23 is used to represent the resistance value of the tenth resistor 232 and the eleventh resistor 2111 in parallel, R2 is used to represent the resistance value of the tenth resistor 232 , and R3 is used to represent the resistance value of the eleventh resistor 2111 .

[0128] Optionally, the configuration voltage of the daughter board module 102 calculated by the buck-boost power conversion unit 1012 when the buck-boost power conversion unit 1012 is enabled to drive can be calculated according to the following formula (3), and the formula (3) is as follows:

[0129] VDD_Out=Vref×(1+R1 / R23)(3)

[0130] It is worth noting that VDD_Out is used to represent the target output voltage calculated by the buck-boost power conversion unit 1012, R23 is used to represent the resistance value of the tenth resistor 232 and the eleventh resistor 2111 in parallel, and Vref is used to represent the voltage of the buck-boost power conversion unit 1012.

[0131] When the twelfth resistor 2121 is grounded, the enable signal of the daughter board module 102 is at a low level, and the buck-boost power conversion unit 1012 generates a target output voltage corresponding to the daughter board module 102 according to the resistance value of the eleventh resistor 2111 under the action of the low level, and the power supply switching unit 1011 switches to the output circuit that is turned on at the second input end under the action of the low level, and the power supply switching unit 1011 outputs the target output voltage to the daughter board module 102.

[0132] When the twelfth resistor 2121 is unconnected, the enable level of the daughter board module 102 is high, the buck-boost power conversion unit 1012 is disabled and in standby mode under the action of the high level, the power supply switching unit 1011 is switched to the output circuit with the first input terminal turned on under the action of the high level, and the power supply switching unit 1011 outputs the system voltage to the daughter board module 102.

[0133] Exemplarily, if the power supply voltage required by the daughter board module 102 is the same as the system voltage provided by the multi-module board power supply system 10 to the main board module 101, the twelfth resistor R4 of the daughter board module 102 is left unconnected, the eleventh resistor R3 of the daughter board module 102 is left unconnected, the enable signal of the daughter board module 102 is at a high level, and the power supply switching unit 1011 switches to the output circuit between the first input terminal and the output terminal under the action of the high level to be turned on. The power supply switching unit 1011 outputs the system voltage VDD_POWER provided by the multi-module board power supply system 10 to the input terminal of the daughter board module 102. At the same time, the step-up / step-down power conversion unit 1012 is disabled and in standby state under the action of the high level.

[0134] Exemplarily, if the power supply voltage required by the daughter board module 102 is different from the system voltage provided by the multi-module board power supply system 10 to the main board module 101, the power supply voltage Vin_Module required by the daughter board module 102 is 6.5V, then the twelfth resistor R4 of the daughter board module 102 is grounded, the eleventh resistor R3 of the daughter board module 102 is grounded, the enable signal of the daughter board module 102 is low level, and the power supply switching unit 1011 switches to the output circuit between the second input terminal and the output terminal under the action of the low level, and the buck-boost power conversion unit 1012 enables the drive under the action of the low level, and calculates the target output voltage VDD_Out corresponding to the daughter board module 102 based on the resistance value of the configuration resistor R3 of the daughter board module 102, and outputs VDD_Out to the input terminal of the daughter board module 102 via the power supply switching unit 1011.

[0135] Optionally, the resistance of the eleventh resistor 2111 in the daughter board module 102 can be calculated according to the following formula (4), and the formula (4) is as follows:

[0136] R3=(R1×R2×Vref) / [(Vout-Vref)×R2-Vref×R1](4)

[0137] It is worth noting that R3 is used to indicate the resistance value of the eleventh resistor 2111 in the daughter board module 102, R1 is used to indicate the resistance value of the ninth resistor 231 in the buck-boost power conversion unit 1012 in the main board module 101, R2 is used to indicate the resistance value of the tenth resistor 232 in the buck-boost power conversion unit 1012 in the main board module 101, Vref is used to indicate the voltage set value of the buck-boost power conversion unit 1012, and Vout is used to indicate the initial output voltage of the buck-boost power conversion unit 1012.

[0138] Exemplarily, if the voltage reference value Vref of the buck-boost power conversion unit 1012 is 0.6V, the ninth resistor R1 in the buck-boost power conversion unit 1012 is 365KΩ and the tenth resistor R2 is 49.9KΩ, then the initial output voltage Vout of the buck-boost power conversion unit 1012 is 0.6×(1+365 / 49.9)=5V. At this time, if the power supply voltage Vin_Module required by the sub-board module 102 is 6.5V, then the eleventh resistor R3 in the sub-board module 102 is (365×49.9×0.6) / [(5-0.6)×49.9-0.6×365]=144.9KΩ.

[0139] It is worth noting that the enable signals and power configuration signals of different daughter board modules 102 are different. The enable signals and power configuration signals of each daughter board module 102 are determined according to the functions implemented by each daughter board module 102 and the factory configuration. This application does not make specific limitations on this.

[0140] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0141] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A multi-module board power supply system, characterized in that: The multi-module board power supply system comprises: a main board module and a sub-board module, the main board module comprises: a power supply switching unit and a step-up / step-down power supply conversion unit, the sub-board module comprises: a configuration unit; The daughter board module is detachably plugged into the main board module, so that the configuration unit in the daughter board module is connected to the control end of the power supply switching unit in the main board module and the enable end and feedback end of the buck-boost power conversion unit; The output end of the buck-boost power conversion unit is connected to the second input end of the power switching unit, and the first input end of the power switching unit is used to access the system voltage; The sub-board module sets a configuration signal corresponding to the sub-board module via the configuration unit, and the configuration signal includes: an enable signal and a power configuration signal; The mainboard module obtains the configuration signal corresponding to the daughter board module via the configuration unit of the daughter board module, the power supply switching unit switches the output circuit under the action of the enable signal, the buck-boost power conversion unit generates a target output voltage under the action of the enable signal and the power configuration signal, and outputs the corresponding target output voltage to the daughter board module via the power supply switching unit.

2. The multi-module board power supply system according to claim 1, characterized in that: The power supply switching unit includes: a first resistor, a first transistor, a diode and a relay; One end of the first resistor is connected to the configuration unit in the sub-board module, the other end of the first resistor is connected to the base of the first transistor, the collector of the first transistor is respectively connected to the fourth end of the relay and the input end of the diode, the output end of the diode, the fifth end of the relay and the second end of the relay are all used to access the system voltage, the first end of the relay is connected to the output end of the buck-boost power conversion unit to access the target output voltage generated by the buck-boost power conversion unit, the third end of the relay is connected to the input end of the sub-board module, and the emitter of the first transistor is grounded.

3. The multi-module board power supply system according to claim 1, characterized in that: The power supply switching unit further includes: a first capacitor, a second capacitor, a third capacitor, a second resistor and an electronic switch chip; The enable end of the electronic switch chip is connected to the configuration unit of the daughter board module, the communication port of the electronic switch chip is grounded via the third capacitor, the input end of the electronic switch chip is used to access the system voltage, the input end of the electronic switch chip is grounded via the first capacitor, the output end of the electronic switch chip is connected to the input end of the daughter board module, the output end of the electronic switch chip is grounded via the second capacitor, and the local management interface of the electronic switch chip is grounded via the second resistor.

4. The multi-module board power supply system according to claim 3, characterized in that: The electronic switch chip comprises: a third resistor, a fourth resistor and an N-type metal oxide semiconductor transistor; The input end of the electronic switch chip is connected to the enable end of the electronic switch chip via the third resistor, the enable end of the electronic switch chip is grounded via the fourth resistor, the input end of the electronic switch chip is also connected to the drain of the N-type metal oxide semiconductor transistor, the output end of the electronic switch chip is respectively connected to the source of the N-type metal oxide semiconductor transistor and the input end of the sub-board module, and the gate of the N-type metal oxide semiconductor transistor is connected to the configuration unit of the sub-board module via the enable end of the electronic switch chip.

5. The multi-module board power supply system according to claim 1, characterized in that: The buck-boost power conversion unit includes: an enabling driving circuit, a power chip and a feedback circuit; The enable terminal of the power chip is connected to the configuration unit of the daughter board module via the enable drive circuit to obtain the enable signal; The feedback end of the power chip is connected to the configuration unit of the daughter board module to obtain the power configuration signal; The output end of the power chip is connected to the feedback end of the power chip via a feedback circuit, and the output end of the power chip is also connected to the input end of the power switching unit. The power chip is used to generate the target output voltage under the action of the enable signal and the power configuration signal, and output the target output voltage to the power switching unit.

6. The multi-module board power supply system according to claim 5, characterized in that: The enabling driving circuit comprises: a fifth resistor, a sixth resistor, a seventh resistor, a second triode and an eighth resistor; One end of the fifth resistor is connected to the configuration unit of the sub-board module, and one end of the fifth resistor is also connected to one end of the sixth resistor and one end of the seventh resistor. The other end of the sixth resistor is used to access the system voltage. The other end of the fifth resistor is connected to the base of the second transistor, and the collector of the second transistor is connected to the enable end of the power chip via the eighth resistor. The emitter of the second transistor and the other end of the seventh resistor are both grounded.

7. The multi-module board power supply system according to claim 5, characterized in that: The feedback circuit comprises: a ninth resistor, a tenth resistor and a fourth capacitor; One end of the ninth resistor is connected to the output end of the power chip, the other end of the ninth resistor is respectively connected to the feedback end of the power chip and one end of the tenth resistor, one end of the ninth resistor is also connected to one end of the fourth capacitor, the other end of the ninth resistor and the other end of the fourth capacitor are both connected to the configuration unit of the sub-board module, and the other end of the tenth resistor is grounded.

8. The multi-module board power supply system according to claim 5, characterized in that: The step-up / step-down power conversion unit further includes: an output circuit, the output circuit including: an inductor, a fifth capacitor, a sixth capacitor and a seventh capacitor; The output end of the power chip is connected to one end of the inductor, the other end of the inductor is connected to one end of the fifth capacitor, one end of the sixth capacitor, one end of the seventh capacitor and the input end of the sub-board module, and the other end of the fifth capacitor, the other end of the sixth capacitor and the other end of the seventh capacitor are all grounded.

9. The multi-module board power supply system according to claim 1, characterized in that: The configuration unit includes: a first configuration circuit and a second configuration circuit; The daughter board module sets an enable signal of the daughter board module via the first configuration circuit, and the daughter board module sets a power configuration signal of the daughter board module via the second configuration circuit.

10. The multi-module board power supply system according to claim 9, characterized in that: The first configuration circuit includes: an eleventh resistor, and the second configuration circuit includes: a twelfth resistor; When the twelfth resistor is grounded, the enable signal of the sub-board module is at a low level, the buck-boost power conversion unit generates a target output voltage corresponding to the sub-board module according to the resistance value of the eleventh resistor under the action of the low level, the power supply switching unit switches to the output circuit with the second input terminal turned on under the action of the low level, and the power supply switching unit outputs the target output voltage to the sub-board module; When the twelfth resistor is unattached, the enable level of the daughter board module is high, the buck-boost power conversion unit stops running under the action of the high level, the power supply switching unit switches to the output circuit with the first input terminal turned on under the action of the high level, and the power supply switching unit outputs the system voltage to the daughter board module.

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