Circuit board and electronic equipment

Abstract

The utility model relates to the technical field of circuit boards, in particular to a circuit board and electronic equipment. The circuit board comprises a connector, the connector comprises a low-voltage pin and a high-voltage pin, a first voltage provided by the low-voltage pin is a normal working voltage of a load device, and a second voltage provided by the high-voltage pin is higher than the voltage provided by the low-voltage pin; the load device is electrically connected with the low-voltage pin; the switch module is connected between the load device and the low-voltage pin, and the controlled end of the switch module is connected with the high-voltage pin; wherein under the condition that the input of the controlled end is a second voltage, the load device and the low-voltage pin are conducted by the switch module; and under the condition that the input of the controlled end is not the second voltage, the switch module is switched off.

Description

Technical Field

[0001] The present disclosure relates to the technical field of circuit boards, and particularly to a circuit board and an electronic device. Background Art

[0002] When installing a circuit board, a power-off operation should be performed. Without power, the connector is snapped together to complete the assembly of the circuit board.

[0003] However, in order to speed up the operation, some technicians may perform illegal live operations, that is, snap the connector together when the battery has already been snapped together. The spacing between the pins of some connectors is short. If the pins of the male and female connectors are displaced when the connector is snapped together, a relatively high voltage may be applied to a load device with a relatively low withstand voltage, resulting in damage to the load device. The existing circuit boards do not provide protection against live operations and rely on regulating the operations of technicians to avoid related problems.

[0004] Figure 1 FIG. is a schematic structural diagram of a circuit board shown according to an exemplary embodiment of the present disclosure. As Figure 1 shown, the load device on the circuit board is connected to the low-voltage pins for providing a first voltage of the normal operating voltage, and high-voltage pins for providing a relatively high second voltage are present near the low-voltage pins. If a technician performs an illegal live operation and there is a snapping error when the male and female connectors of the connector are snapped together, causing the pin 2 corresponding to the high-voltage pin at the other end of the connector to be connected to the low-voltage pin 1 of the connector, it will cause the voltage output from the low-voltage pin to the load device to be the relatively high second voltage, thereby burning out the load device with a relatively low withstand voltage. Summary of the Utility Model

[0005] To overcome the problems in the related art, the present disclosure provides a circuit board and an electronic device, which can solve the above problems.

[0006] According to a first aspect of an embodiment of the present disclosure, there is provided a circuit board, the circuit board including:

[0007] A connector, on which there are low-voltage pins and high-voltage pins, the first voltage provided by the low-voltage pins being the normal operating voltage of the load device, and the second voltage provided by the high-voltage pins being higher than the first voltage;

[0008] The load device, electrically connected to the low-voltage pins;

[0009] A switch module is connected between the load device and the low-voltage pin, and its control end is connected to the high-voltage pin. Wherein, when the input of the control end is the second voltage, the switch module conducts the load device and the low-voltage pin; when the input of the control end is not the second voltage, the switch module disconnects.

[0010] According to a second aspect of the embodiments of the present disclosure, an electronic device is provided, including the circuit board as described in the first aspect.

[0011] The technical solutions provided by the embodiments of the present disclosure may include the following beneficial effects:

[0012] The present disclosure provides a switch module between the load device and the low-voltage pin. The control end of the switch module is connected to the high-voltage pin. When the voltage input at the control end is equal to the second voltage of the high-voltage pin, the switch module conducts the load device and the low-voltage pin. When the voltage input at the control end is not equal to the second voltage, the switch module disconnects the load device and the low-voltage pin. Through the switch module, it is possible to avoid the problem that a relatively high second voltage is input to the load device through the low-voltage pin due to the misalignment of the high-voltage pin and the low-voltage pin during the buckling process of the connector, resulting in damage to the load device. In the solution of the present disclosure, even if the connector is misaligned and buckled, the switch module is in an off state due to the voltage input at the control end, so as to avoid a large voltage being input to the load device.

[0013] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings herein are incorporated into the specification and constitute a part of the present disclosure, showing embodiments consistent with the present disclosure and used together with the specification to explain the principles of the present disclosure.

[0015] Figure 1 FIG. is a schematic structural diagram of a circuit board shown according to an exemplary embodiment of the present disclosure.

[0016] Figure 2 FIG. is a schematic structural diagram of a circuit board shown according to an exemplary embodiment of the present disclosure.

[0017] Figure 3 FIG. is a schematic structural diagram of a circuit board shown according to an exemplary embodiment of the present disclosure.

[0018] Figure 4 FIG. is a schematic structural diagram of a circuit board shown according to an exemplary embodiment of the present disclosure.

[0019] Figure 5 FIG. is a schematic structural diagram of a circuit board shown according to an exemplary embodiment of the present disclosure.

[0020] Figure 6 This is a schematic structural diagram of a circuit board shown according to an exemplary embodiment of the present disclosure.

[0021] Figure 7 This is a schematic structural diagram of an electronic device shown according to an exemplary embodiment of the present disclosure. Detailed implementation manners

[0022] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present disclosure. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0023] The terms used in the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. The singular forms "a", "the", and "said" used in the present disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0024] It should be understood that although the terms first, second, third, etc. may be used in the present disclosure to describe various information, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present disclosure, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "when" or "while" or "in response to determining".

[0025] In the related art, in addition to strengthening the specifications and emphasizing not to fasten the connector under live conditions, during the pre-stack stage, the sorting of the live pins of the connector on the circuit board can be modified, and the high-voltage live pins can be separated from the low-voltage live pins by a relatively large distance, so as to avoid accidentally inputting high voltage to the load device through the low-voltage pins when the fastening is incorrect.

[0026] However, this method also has certain drawbacks. First, increasing the spacing between the high-voltage pins and the low-voltage pins can only reduce the probability of a relatively high voltage output through the low-voltage pins after incorrect buckling, but there is still a possibility that a relatively high voltage is input into the load device through the low-voltage pins, and this possibility will still lead to the result of damage to the load device. Second, changing the pin sorting will affect the wiring on the circuit board. There may be a situation where the wiring that meets the requirements cannot be completed on the circuit board or it interferes with the wiring design on the circuit board, and new requirements are also put forward for the connector.

[0027] To solve the above technical problems, the present disclosure proposes a circuit board.

[0028] Figure 2 FIG. is a schematic structural diagram of a circuit board shown according to an embodiment of the present disclosure. A circuit board, also known as a Printed Circuit Board (PCB), can be widely used in various electronic devices. Electronic devices include but are not limited to communication devices such as mobile phones, tablet computers, wearable devices, sensors, and Internet of Things devices.

[0029] As Figure 2 shown, the circuit board 200 includes:

[0030] A connector 210, on which there are a low-voltage pin 2101 and a high-voltage pin 2102. The first voltage 1 provided by the low-voltage pin 2101 is the normal operating voltage of the load device 220, and the second voltage 2 provided by the high-voltage pin 2102 is higher than the first voltage 1;

[0031] The load device 220 is electrically connected to the low-voltage pin 2101;

[0032] A switch module 230, connected between the load device 220 and the low-voltage pin 2101, and the control end is connected to the high-voltage pin 2102; wherein, when the input of the control end is the second voltage, the switch module 230 conducts the load device 220 and the low-voltage pin 2101; when the input of the control end is not the second voltage, the switch module 230 disconnects.

[0033] In some embodiments, the power supply module supplies power to the circuit board 200 through the connector 210.

[0034] The connector 210 includes a male seat and a female seat, which are respectively arranged on the circuit board 200 and the power supply module. The pins on the male seat and the female seat of the connector 210 correspond to each other. When the connector is correctly buckled, the power supply module supplies power to the load device 220 on the circuit board 200 through the low-voltage pin 2101 on the connector, and the first voltage provided by the low-voltage pin 2101 can make the load device 220 work normally.

[0035] In some embodiments, the connector 210 on the circuit board 200 can be a male socket or a female socket.

[0036] In some embodiments, the high-voltage pin 2102 can be adjacent to the low-voltage pin 2101.

[0037] In the adjacent case, it is easier for the male socket of the high-voltage pin to be connected to the female socket of the low-voltage pin due to incorrect connection of the connector, so that the voltage output from the low-voltage pin to the load device 220 is a higher second voltage.

[0038] It should be noted that the circuit board proposed in the present disclosure can be applied to the above adjacent application scenarios, or can be applied to application scenarios where the high-voltage pin 2102 is not adjacent to the low-voltage pin 2101. The former is a more common general scenario.

[0039] In some embodiments, the second voltage is higher than the first voltage.

[0040] When the second voltage is higher than the first voltage, incorrect connection of the connector may cause damage to the load device 220 with a smaller withstand voltage value. However, according to different technical requirements, for example, if it is required that the load device is only powered on when the connector is correctly connected, the second voltage in the circuit board proposed in the present disclosure can also be less than the first voltage.

[0041] When the second voltage is less than the first voltage, even if incorrect connection occurs, it will not cause damage to the load device 220 due to too high input voltage, but the load device 220 will also not work properly because the input voltage is not the first voltage.

[0042] In some embodiments, one end of the load device 220 is electrically connected to the low-voltage pin 2101, and the other end is grounded.

[0043] In some embodiments, the switch module 230 is connected between the load device 220 and the low-voltage pin 2101, and the control end is connected to the high-voltage pin 2102; wherein, when the input of the control end is the second voltage, the switch module 230 conducts the load device 220 and the low-voltage pin 2101; when the input of the control end is not the second voltage, the switch module 230 disconnects.

[0044] When the connector 210 is correctly connected, the low-voltage pin 2101 can provide the first voltage, and the high-voltage pin 2102 can provide the second voltage. The control end of the switch module 230 is connected to the high-voltage pin 2102.

[0045] When the input at the controlled terminal of the switch module 230 is the second voltage, it means that the voltage provided by the high-voltage pin 2102 is the second voltage at this time, the connector is in the correct latched state, and no mis-latching has occurred. In this case, it can be considered that the low-voltage pin 2101 is also correctly latched, and the low-voltage pin 2101 can correctly provide the first voltage. In this case, the switch module 230 can conduct the load device 220 and the low-voltage pin 2101, so that the load device 220 can operate normally under the action of the first voltage provided by the low-voltage pin 2101.

[0046] When the input at the controlled terminal of the switch module 230 is not the second voltage, since the controlled terminal is connected to the high-voltage pin 2102, the input at the controlled terminal not being the second voltage means that the high-voltage pin 2102 has been mis-latched. Since the connector is a rigid structural component, it can be considered that the low-voltage pin 2101 has also been mis-latched synchronously. The voltage output by the low-voltage pin 2101 may not be the first voltage. In this case, the switch module 230 can be disconnected to prevent the low-voltage pin 2101 from outputting an unknown voltage to the load device 220 and to prevent the load device 220 from being in an abnormal operating state or being damaged.

[0047] In fact, the controlled terminal of the switch module 230 is used to determine whether the connected high-voltage pin 2102 is correctly latched. And in the case where the connector is a rigid structural component, it can be determined that when the high-voltage pin 2102 is correctly latched, the low-voltage pin 2101 is also correctly latched, and when the high-voltage pin 2102 is mis-latched, the low-voltage pin 2101 is also mis-latched.

[0048] In some embodiments, there is no limitation on whether the pin connected to the controlled terminal of the switch module is the pin adjacent to the low-voltage pin 2101, nor is there a limitation on whether the voltage provided by the pin connected to the controlled terminal of the switch module is greater than the first voltage.

[0049] The switch module is configured to conduct when the input at the controlled terminal is the voltage value provided when the pin connected to the controlled terminal is correctly latched, and to disconnect when the input at the controlled terminal is not the voltage value provided when the pin connected to the controlled terminal is correctly latched.

[0050] For the circuit board proposed by the present disclosure, by adding a switch module between the load device and the low-voltage pin, it is possible to avoid the mis-latching of the connector by technicians during live operation, resulting in the misalignment of the power supply pins, causing the live high-voltage pin to be latched to the low-voltage pin and damaging the load device connected to the low-voltage pin. By adopting the technical solution proposed by the present disclosure, without affecting the circuit board routing, even if the connector is mis-latched while live, the load device will not be damaged.

[0051] In some embodiments, the connector 210 includes a Board-to-Board (BTB) connector.

[0052] The BTB connector has a relatively large number of pins and a small spacing between the pins. When the BTB connector is engaged, the pins of the male and female connectors are more likely to shift, causing the above-mentioned technical problems proposed in the present disclosure.

[0053] In some embodiments, the low-voltage pin 2101 includes the ELVSS pin in the BTB connector, and the high-voltage pin 2102 includes the VSYS pin in the BTB connector.

[0054] As an example, the low-voltage pin and the high-voltage pin can be the ELVSS pin and the VSYS pin, respectively. Among them, the voltage provided by the ELVSS pin is relatively small, and the voltage provided by the VSYS pin is relatively large.

[0055] In some embodiments, after the power supply module is powered by a power source or a dummy power source, the VSYS pin on the corresponding connector will be energized and in a high-voltage state, while the ELVSS pin can have a relatively small voltage or be unpowered.

[0056] When the male and female seats of the BTB connector are engaged, due to the relatively close pins of the BTB connector and the adjacent ELVSS pin and VSYS pin, it is easy to have an engagement shift, that is, the energized VSYS pin on the BTB connector on the power supply module side is mis-engaged with the unpowered ELVSS pin on the BTB connector on the circuit board side.

[0057] Figure 3 It is a schematic structural diagram of a circuit board shown according to an embodiment of the present disclosure.

[0058] As Figure 3 shown, in some embodiments, the switching module includes:

[0059] A field effect transistor ((Metal Oxide Semiconductor Field Effect Transistor), abbreviated as MOS transistor) Q1, the gate of the field effect transistor is connected to the high-voltage pin 2102, and the source and drain are respectively connected to the load device 220 and the low-voltage pin 2101.

[0060] Specifically, the gate of the MOS transistor Q1 is connected to the high-voltage pin 2102, the drain is connected to the low-voltage pin 2101, and the source is connected to the load device 220.

[0061] When the connector 210 is correctly latched, since the high-voltage pin 2102 is energized, the MOS transistor Q1 can be turned on through the gate first. After the MOS transistor Q1 is turned on, the low-voltage pin 2101 supplies power to the load device 220 through the drain and source of the MOS transistor Q1.

[0062] When the connector 210 is incorrectly latched and the latching is displaced, since the high-voltage pin 2102 is not correctly latched at this time and the provided voltage is not the second voltage, there is no high voltage at the base of the MOS transistor Q1, so the MOS transistor Q1 is in the off state. In this case, regardless of the voltage value on the low-voltage pin 2101, even if it is the second voltage, it can only reach the drain of the MOS transistor Q1 and cannot pass through the source, and has no effect on the device.

[0063] Figure 4 It is a schematic structural diagram of a circuit board shown according to an embodiment of the present disclosure.

[0064] As Figure 4 shown, in some embodiments, the switch module includes an analog switch, and the controlled end includes the power supply pin of the analog switch.

[0065] One end of the analog switch is connected to the load device 220, the other end is connected to the low-voltage pin 2101, and the power supply pin of the analog switch is connected to the high-voltage pin 2102.

[0066] Replacing the MOS transistor with an analog switch can achieve more complex functions to meet more technical requirements.

[0067] In some embodiments, the number of the load devices is multiple, and the multiple load devices are respectively connected to the corresponding pins on the connector through the switch module.

[0068] The number of load devices on the circuit board can be multiple, and they are respectively powered by the corresponding pins on the connector.

[0069] In some embodiments, each load device can correspond to a switch module.

[0070] Each switch module is respectively used to control the conduction and disconnection of the circuit of the corresponding load device to protect each load device from being damaged due to the incorrect latching of the energized connector.

[0071] In some other embodiments, the multiple load devices can be connected to the corresponding multiple pins on the connector through one switch module.

[0072] The switch module can be an analog switch. The input ends of the switch module are respectively connected to multiple pins, and the output ends are respectively connected to multiple load devices, where each load device corresponds to a pin one by one and is electrically connected through the switch module.

[0073] When the input at the controlled end of the switch module meets the conditions, each load device conducts with the corresponding pin one by one. When the input at the controlled end of the switch module does not meet the conditions, all load devices are disconnected from the corresponding pins.

[0074] All load devices can be protected through a switch module, which can reduce the number of switch modules used when there are multiple load devices on the circuit board and thus reduce costs.

[0075] In some embodiments, the controlled end of the switch module in the above embodiments is connected to the high-voltage pin 2102, and the above conditions include: the input at the controlled end is the second voltage.

[0076] Since the connector is a rigid structural part, if the high-voltage pin 2102 is correctly latched, it can be considered that all pins are correctly latched. Thus, the controlled end can be connected only to the high-voltage pin 2102 to confirm whether the switch module is conducting.

[0077] Figure 5 It is a schematic structural diagram of a circuit board shown according to an embodiment of the present disclosure.

[0078] In some embodiments, the number of high-voltage pins on the connector is multiple, and the controlled end of the switch module is connected to the multiple high-voltage pins; wherein, when the controlled end receives that the outputs of all the multiple high-voltage pins are the second voltage, the switch module conducts the load device with the low-voltage pin; when the controlled end receives that the output of any one of the high-voltage pins is not the second voltage, the switch module disconnects.

[0079] As Figure 5 shown, when there are many pins on the connector, the following scenario may occur: The connector further includes a third pin 2103 and a fourth pin 2104. The voltage provided by the fourth pin 2104 is also the second voltage when correctly latched, while the third voltage provided by the third pin 2103 when correctly latched is greater than the first voltage. In this scenario, if the connector is shifted a lot during latching, such that the fourth pin 2104 is latched onto the high-voltage pin 2102, the voltage received by the controlled end of the switch module is also the second voltage, meeting the conduction condition. However, at this time, the voltage provided on the low-voltage pin 2101 is the third voltage provided by the incorrectly latched third pin 2103, so it will still cause damage to the load device 220.

[0080] Therefore, in order to avoid the power supply voltage of multiple pins on the connector being the second voltage, when there is a wrong mating, other pins may be mated with the high-voltage pin 2102 to provide the second voltage to the controlled end of the switch module, causing the switch module to close. As a result, when there is a wrong mating, the voltage output on the low-voltage pin 2101 is greater than the first voltage, leading to an excessively high power supply voltage for the load device and damaging the load device. The present disclosure proposes an improved embodiment.

[0081] When the number of high-voltage pins on the connector is multiple, the controlled end of the switch module is connected to the multiple high-voltage pins. These multiple high-voltage pins are connected in parallel with each other and are connected to the controlled end of the switch module. Then, in the case of correct mating, the voltage received by the controlled end of the switch module should still be the second voltage. However, if the connector is wrongly mated and the voltage output by any one of the high-voltage pins is not the second voltage, the voltage received by the controlled end will also change and will not be the second voltage.

[0082] Therefore, when the input of the controlled end is the second voltage, the switch module conducts the load device to the low-voltage pin; when the input of the controlled end is not the second voltage, the switch module disconnects.

[0083] Multiple high-voltage pins are used to accurately position the connector to determine whether the connector is correctly mated and whether the pins are displaced.

[0084] Figure 6 It is a schematic structural diagram of a circuit board shown according to an embodiment of the present disclosure.

[0085] In some embodiments, the pins on the connector are arranged in a rectangular shape, and the controlled end of the switch module is connected to the pins at the four corners of the connector; wherein, when the switch module receives the voltages of the pins at the four corners, it conducts the load device to the low-voltage pin; when the switch module does not receive the voltage of any one of the pins at the four corners, the switch module disconnects.

[0086] As Figure 6 shown, the load device 220 is connected to the low-voltage pin 2101 through the switch module. The controlled end of the switch module is connected to the pins at the four corners of the pins arranged in a rectangular shape on the connector. As Figure 6 shown, the pin A, pin B, pin C, and pin D are respectively connected to the controlled end of the switch module 230. If the four voltages received by the controlled end of the switch module 230 are respectively the voltages generated by the pins A, B, C, and D when the connector is correctly mated, it indicates that the connector is not wrongly mated; while if the controlled end does not receive the voltage of any one of the pins, it indicates that the connector has been displaced.

[0087] For the circuit board proposed by the present disclosure, whether the voltage received by the control terminal of the switch module is a preset voltage can be used to determine whether the pin connected to the control terminal is correctly engaged, thereby determining whether the low-voltage pin connected to the load device is correctly engaged. When correctly engaged, it conducts, and when incorrectly engaged, it disconnects, so as to avoid pin displacement caused by incorrect engagement and high voltage output to the load device, resulting in damage to the load device.

[0088] Corresponding to the embodiment of the circuit board proposed by the present disclosure, the present disclosure also provides an embodiment of a corresponding electronic device.

[0089] Figure 7 It is a schematic structural diagram of an electronic device shown according to an embodiment of the present disclosure.

[0090] An embodiment of the present disclosure also proposes an electronic device 700, including the circuit board 730 of any of the above embodiments.

[0091] As Figure 7 shown, in some embodiments, the electronic device 700 further includes: a main board 710 and a flexible printed circuit board 720 (Flexible Printed Circuit, FPC); wherein,

[0092] The main board 710 is connected to the circuit board 730 through the flexible printed circuit board 720, and the flexible printed circuit board 720 is connected to the circuit board 730 through the connector; when the switch module 230 conducts, the main board 710 supplies power to the load device 220.

[0093] The main board 710 is used to supply power to the connector on the FPC 720. When the connector on the circuit board 730 is correctly engaged, the main board 710 can supply power to the load device 220 through the low-voltage pin on the connector.

[0094] In some embodiments, the main board and the flexible printed circuit board are connected through another set of connectors.

[0095] The main board 710 and the FPC 720 are also connected through another set of connectors. For ease of description, as Figure 7 shown, the four connectors are divided into connector A, connector B, connector C, and connector D. Among them, the connector on the main board 710 is connector A, the connector on the FPC 720 that engages with the main board 710 is connector B, the connector that engages with the circuit board 730 is connector C, and the connector on the circuit board 730 is connector D.

[0096] If another set of connectors (connector A and connector B) are incorrectly snapped together, the voltage output by the high-voltage pin on connector C is not the second voltage either. In this case, even if connector C and connector D are correctly snapped together, the voltage received by the controlled end of switch module 230 is not the second voltage, and switch module 230 does not conduct, preventing the load device from being damaged due to excessive voltage caused by the incorrect snapping together of the other set of connectors.

[0097] Therefore, in an electronic device, in fact, no matter where the incorrect snapping occurs, as long as the voltage output by the high-voltage pin is not the second voltage, switch module 230 disconnects to prevent the load device from being damaged due to excessive voltage output by the low-voltage pin.

[0098] In some embodiments, to determine whether a connector is incorrectly snapped together, an indicator light can be added to the circuit of the load device.

[0099] The indicator light is connected in series in the circuit of the load device. When switch module 230 conducts and the load device operates normally, the indicator light is on. When the connector is incorrectly snapped together and switch module 230 disconnects, the indicator light is off.

[0100] In some embodiments, the indicator light can also be provided on the FPC.

[0101] To determine the location of the incorrect snapping, an indicator light can be added to the circuit on the FPC. If the connector between the main board and the FPC is correctly snapped together, the indicator light is on. If the connector between the main board and the FPC is incorrectly snapped together, the indicator light is off.

[0102] Regarding the connection method of the above-mentioned indicator light, the present disclosure does not make any restrictions, and any connection that can meet the requirements is acceptable.

[0103] After considering the specification and practicing the disclosure herein, those skilled in the art will readily think of other embodiments of the present disclosure. The present disclosure aims to cover any variations, uses, or adaptations of the present disclosure, which follow the general principles of the present disclosure and include the common general knowledge or conventional technical means in the technical field not disclosed by the present disclosure. The specification and embodiments are only regarded as exemplary, and the true scope and spirit of the present disclosure are pointed out by the following claims.

[0104] It should be understood that the present disclosure is not limited to the exact structures already described and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present disclosure is only limited by the appended claims.

[0105] It should be noted that in this article, relational terms such as first and second are only 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. The term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the said element.

Claims

1. A circuit board, characterized in that: The circuit board comprises: A connector, wherein the connector comprises a low voltage pin and a high voltage pin, wherein a first voltage provided by the low voltage pin is an operating voltage of a load device, and a second voltage provided by the high voltage pin is higher than the first voltage; The load device is electrically connected to the low voltage pin; The switch module is connected between the load device and the low-voltage pin, and the controlled end is connected to the high-voltage pin.

2. The circuit board according to claim 1, characterized in that: The connector includes a board-to-board connector BTB.

3. The circuit board according to claim 1, characterized in that: The switch module comprises: A field effect transistor, wherein the gate of the field effect transistor is connected to the high voltage pin, and the source and the drain are connected to the load device and the low voltage pin respectively.

4. The circuit board according to claim 1, characterized in that: The switch module includes an analog switch, and the controlled end includes a power supply pin of the analog switch.

5. The circuit board according to claim 1, characterized in that: There are multiple load devices, and the multiple load devices are respectively connected to corresponding pins on the connector through the switch module.

6. The circuit board according to claim 1, characterized in that: There are multiple high-voltage pins on the connector, and the controlled end of the switch module is connected to the multiple high-voltage pins; wherein, When the outputs of the plurality of high-voltage pins received by the controlled end are all the second voltage, the switch module conducts the load device and the low-voltage pin; When the output of any high-voltage pin received by the controlled end is not the second voltage, the switch module is disconnected.

7. The circuit board according to claim 1, characterized in that: The pins on the connector are arranged in a rectangular shape, and the controlled end of the switch module is connected to the pins on the four corners of the connector; wherein, when the switch module receives the voltage of the pins on the four corners, the load device is connected to the low-voltage pin; and when the switch module does not receive the voltage of any pin on the four corners, the switch module is disconnected.

8. An electronic device, characterized in that: Comprising a circuit board as described in any one of claims 1-7.

9. The electronic device according to claim 8, characterized in that: The electronic device further comprises: a main board and a flexible circuit board; wherein, The main board is connected to the circuit board via the flexible circuit board, and the flexible circuit board is connected to the circuit board via the connector; when the switch module is turned on, the main board supplies power to the load device.

10. The electronic device according to claim 9, characterized in that: The main board is connected to the flexible circuit board via another group of connectors.

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