Circuit board assembly and electronic equipment

Abstract

The invention provides a circuit board assembly and electronic equipment. The circuit board assembly comprises a circuit board, a first switch and an RTC module. The first switch and the RTC module are both arranged on the circuit board, and the circuit board is provided with a battery power input end, a power output end, a first electric connecting piece and a second electric connecting piece. The first switch comprises a first end and a second end, the battery power supply input end is electrically connected with the first end through a first electric connecting piece, the second end is electrically connected with the power supply output end, and the battery power supply input end is electrically connected with the input end of the RTC module through a second electric connecting piece. According to the circuit board assembly, when the electronic equipment is in the transportation mode, the battery can supply power to the RTC module through the second electric connecting piece, the running time of the RTC module is long, and the user experience is good.

Description

Technical Field

[0001] This application relates to the field of electronic devices, and more particularly to a circuit board assembly and an electronic device. Background Technology

[0002] Currently, mobile electronic devices primarily use lithium batteries for power. As the electronic device remains idle for longer periods, the battery's internal energy is gradually released, and the voltage slowly decreases. Discharge should cease when the voltage drops to a certain value, as continuing to discharge below this threshold constitutes over-discharge, which can easily cause chemical reactions in the battery, leading to swelling and bulging, posing a safety hazard. To avoid battery swelling and bulging due to over-discharge and to improve battery life, electronic devices are designed with a transport mode. When the electronic device detects that the user has not used it for a period of time, it enters transport mode. In this mode, the battery disconnects power to the PMU and other functional components.

[0003] However, current PMUs typically include a Real-Time Clock (RTC) module. The primary function of the RTC module in electronic devices is to provide time and time-related information. When the electronic device is in transport mode, the battery disconnects power to the PMU, causing the RTC to also lose power. This results in the RTC being unable to maintain its operational state, and the time information cannot be retained. Consequently, the electronic device's clock reverts to its default value, causing inconvenience to the user. Summary of the Invention

[0004] This application provides a circuit board assembly designed to enable an electronic device to maintain the operation of an RTC module even in transport mode, and an electronic device including the circuit board assembly.

[0005] In a first aspect, a circuit board assembly is provided. The circuit board assembly includes a circuit board, a first switch, and an RTC module. Both the first switch and the RTC module are disposed on the circuit board, which has a battery power input terminal, a power output terminal, a first electrical connector, and a second electrical connector. The first switch includes a first terminal and a second terminal. The battery power input terminal is electrically connected to the first terminal via the first electrical connector, and the second terminal is electrically connected to the power output terminal. The battery power input terminal is electrically connected to the input terminal of the RTC module via the second electrical connector.

[0006] Understandably, typical electronic devices connect the input terminals of the RTC module and other functional devices / modules to the power output terminal so that the battery can power these devices, modules, and the RTC module. A first switch connects the power output terminal and the battery power input terminal. When the electronic device detects that the user has not used the phone for a period of time, to prevent the battery from over-discharging and causing problems such as swelling or bulging, the device will actively switch to transport mode. When the electronic device is in transport mode, the first switch will open, creating an open circuit between the battery power input terminal and the power output terminal. At this time, the RTC module and other functional devices / modules will be powered down, preventing them from maintaining normal operation. Power loss from the RTC module will cause the electronic device's clock to revert to its default value, affecting normal user operation. The circuit board assembly in this embodiment also includes a second electrical connector. This second electrical connector can be electrically connected between the battery power input terminal and the RTC module's input terminal. Thus, whether the electronic device is in transport mode or not, the battery can power the RTC module through the second electrical connector. In other words, by setting a second electrical connector to electrically connect the battery power input terminal and the RTC input terminal, this application enables the battery to continue supplying power to the RTC module even when the electronic device is in transit, thereby effectively extending the operating time of the RTC module and improving the user experience.

[0007] In one possible implementation, the circuit board assembly also includes an LDO (Light Detector and Distributor), which is mounted on the circuit board. The output of the LDO is electrically connected to the input of the RTC module. This allows the second electrical connector to be electrically connected between the battery power input and the LDO output, enabling the battery to directly power the RTC module without modifying the circuitry between the LDO and other components, thus reducing the manufacturing cost of the circuit board assembly. Alternatively, the second electrical connector can also be electrically connected between the battery power input and the LDO input, allowing the battery's power to pass through the LDO before being transmitted to the RTC module. This results in a more stable power supply to the RTC module, improving the time stability of the RTC module. Furthermore, the electrical connection between the LDO's input and the battery power input via the second electrical connector effectively prevents current loss when the first switch is off, as some battery current would flow through the LDO to other components besides the RTC module. This extends battery life and consequently, the operating time of the RTC module.

[0008] In one possible implementation, the circuit board assembly also includes a power management chip, which is mounted on the circuit board. The RTC module and LDO are both integrated into the power management chip. This integration of the RTC module and LDO into the power management chip results in a more compact circuit board assembly structure, which helps save internal space in the electronic device.

[0009] In one possible implementation, the input terminal of the LDO is electrically connected to the power output terminal, and both the output terminal of the LDO and the input terminal of the RTC module are electrically connected to a second electrical connector. This allows for direct electrical connection between the LDO's output terminal, the RTC module's input terminal, and the battery power input terminal via the second electrical connector. Consequently, without any modification to the power management chip's own circuitry, the operating time of the RTC module can be extended, effectively reducing the manufacturing cost of the circuit board assembly.

[0010] In one possible implementation, the power management chip further includes a first pin, one end of which is electrically connected to the output of the LDO and the input of the RTC module. The end of the first pin furthest from the LDO is electrically connected to a second electrical connector. Thus, by directly connecting the second electrical connector between the battery power input and the first pin, the operating time of the RTC module can be extended by adding only the second electrical connector without any modification to the power management chip's own circuitry, effectively reducing the manufacturing cost of the circuit board assembly.

[0011] In one possible implementation, the input terminal of the LDO is electrically connected to the battery power input terminal via a second electrical connector. This allows the voltage input from the battery to the RTC module to be stepped down by the LDO. The LDO reduces the battery's output voltage while ensuring output voltage stability, thus improving the operational stability of the RTC module.

[0012] In one possible implementation, the power management chip also includes a second pin. The inputs of the LDO and the RTC module are both electrically connected to the second electrical connector via this second pin.

[0013] It is understood that the power management chip in this embodiment also includes a second pin. The second pin can be electrically connected to the input terminal of the LDO. A second electrical connector can be electrically connected between the battery power input terminal and the second pin. Thus, by adding a second pin to the power management chip, the battery's power can be directly transmitted to the RTC module sequentially through the second electrical connector, the second pin, and the LDO. The power supply to the RTC module is not affected by the first switch, allowing the RTC module to operate normally even when the electronic device is in transport mode, which improves the user experience. Secondly, compared to the LDO's input terminal, which is also electrically connected to other devices such as the power module, in this embodiment, the LDO's input terminal is only electrically connected to the second pin, without any other electrical connections. This effectively prevents a portion of the battery current from flowing to other devices through the LDO when the first switch is open, thus avoiding current loss and extending the RTC module's operating time. For example, by electrically connecting only the second pin and the RTC module's input terminal, the leakage current can be reduced by 70%-80%.

[0014] In one possible implementation, the circuit board assembly also includes an energy storage module, with both the LDO's output and the RTC module's input electrically connected to it. This allows the energy storage module to store electrical energy when the battery powers the RTC module. When the electronic device experiences a momentary power outage (e.g., a power outage lasting a few seconds) due to a drop, collision, or other event causing the second electrical connection or other electrical connections to temporarily disconnect, the capacitor can discharge, thus maintaining the RTC module's continuous operation and improving the user experience.

[0015] In one possible implementation, the circuit board further includes a USB interface and a buck charging chip. The USB interface is used for electrical connection to an external power source, and the first switch is integrated into the buck charging chip. It is understood that the circuit board assembly in this embodiment may also include a buck charging chip. The first switch can be integrated into the buck charging chip. In this way, the first switch can be used both for charging the battery with an external power source and for switching between transport and non-transport modes of the electronic device, achieving "multi-purpose functionality." This helps reduce the cost of the circuit board assembly.

[0016] In one possible implementation, the buck charging chip further includes a second switch and a control module. The second switch includes a third terminal and a fourth terminal; the third terminal is electrically connected to a USB interface, and the fourth terminal is electrically connected to a power output terminal. The control module is electrically connected to the first and second switches and is used to control both switches. Thus, on the one hand, the control module of the buck charging chip can be used to control the first and second switches to control the external power supply to charge the battery; on the other hand, the control module can also be used to control the first switch, enabling the electronic device to switch between transport and non-transport modes. Both the first switch and the control module can achieve "multi-purpose functionality," which helps reduce the cost of circuit board components.

[0017] Secondly, an electronic device is provided. The electronic device includes a battery, functional components, and the aforementioned circuit board assembly. The battery is electrically connected to the battery power input terminal, and the functional components are electrically connected to the power output terminal. The RTC module of the electronic device of this application can maintain its working state even in transport mode, resulting in a longer operating time and a better user experience.

[0018] In one possible implementation, the electronic device has a transport mode and a non-transport mode. When the electronic device is in transport mode, the first switch is open, and the battery supplies power to the RTC module through the second electrical connector. When the electronic device is in non-transport mode, the first switch is closed, and the battery supplies power to the functional devices through the first electrical connector. The battery also supplies power to the RTC module through the second electrical connector.

[0019] Understandably, typical electronic devices connect the input terminals of the RTC module and other functional devices / modules to the power output terminal so that the battery can power these devices, modules, and the RTC module. A first switch connects the power output terminal and the battery power input terminal. When the electronic device detects that the user has not used the phone for a period of time, to prevent the battery from over-discharging and causing problems such as swelling or bulging, the device will actively switch to transport mode. When the electronic device is in transport mode, the first switch will open, creating an open circuit between the battery power input terminal and the power output terminal. At this time, the RTC module and other functional devices / modules will be powered down, preventing them from maintaining normal operation. Power loss from the RTC module will cause the electronic device's clock to revert to its default value, affecting normal user operation. The circuit board assembly in this embodiment also includes a second electrical connector. This second electrical connector can be electrically connected between the battery power input terminal and the RTC module's input terminal. Thus, whether the electronic device is in transport mode or not, the battery can power the RTC module through the second electrical connector. In other words, by setting a second electrical connector to electrically connect the battery power input terminal and the RTC input terminal, this application enables the battery to continue supplying power to the RTC module even when the electronic device is in transit, thereby effectively extending the operating time of the RTC module and improving the user experience. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the background art, the accompanying drawings used in the embodiments of this application or the background art will be described below.

[0021] Figure 1 This is a schematic diagram of the structure of the electronic device provided in some embodiments of this application;

[0022] Figure 2 yes Figure 1 The diagram shows a partially exploded view of the electronic device in some embodiments.

[0023] Figure 3 yes Figure 2 The circuit diagrams of the circuit board assembly, battery, and functional devices of the electronic device shown are illustrated in some embodiments.

[0024] Figure 4 yes Figure 3 The circuit shown is an equivalent circuit diagram of the electronic device when it is in transport mode.

[0025] Figure 5 yes Figure 3 The circuit diagram shown is a circuit diagram in another embodiment.

[0026] Figure 6 yes Figure 5 The circuit shown is the equivalent circuit diagram of the electronic device when it is in transport mode. Detailed Implementation

[0027] The embodiments of this application are described below with reference to the accompanying drawings.

[0028] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. "Fixed connection" refers to a connection where the relative positional relationship remains unchanged after connection. The directional terms mentioned in the embodiments of this application, such as "upper," "lower," "inner," and "outer," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this application, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application. "Multiple" refers to at least two.

[0029] In the embodiments of this application, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," "third," and "fourth" may explicitly or implicitly include one or more of that feature.

[0030] In the embodiments of this application, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0031] References to "one embodiment" or "some embodiments" as used in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, phrases such as "in one embodiment," "in some embodiments," "in other embodiments," and "in another embodiment" appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0032] It is understood that the specific embodiments described herein are merely for explaining the relevant invention and not for limiting the invention. It should also be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0033] Figure 1 This is a schematic diagram of the structure of the electronic device 1000 provided in some embodiments of this application. Figure 2 yes Figure 1 The diagram shows a partially exploded view of the electronic device 1000 in some embodiments.

[0034] like Figure 1 and Figure 2 As shown, the electronic device 1000 can be a mobile phone, tablet computer, headphones, wearable device, augmented reality (AR) glasses, AR helmet, virtual reality (VR) glasses, or VR helmet, etc. Figure 1 The electronic device 1000 shown is illustrated using a mobile phone as an example. It should be noted that... Figure 1 and Figure 2 The electronic device 1000 is shown only schematically, and the actual shape, size, and construction of these components are not subject to change. Figure 1 and Figure 2 limited.

[0035] For example, electronic device 1000 may include housing 100 and display screen 200. Display screen 200 may be mounted on housing 100. For ease of description, the width direction of electronic device 1000 is defined as the X-axis. The length direction of electronic device 1000 is defined as the Y-axis. The thickness direction of electronic device 1000 is defined as the Z-axis. It is understood that the coordinate system of electronic device 1000 can be flexibly set according to specific actual needs. In other embodiments, when electronic device 1000 is a device of other forms, electronic device 1000 may not include display screen 200.

[0036] Exemplarily, the housing 100 may include a middle frame 101 and a rear cover 102. The rear cover 102 may be fixedly connected to the periphery of the middle frame 101 and enclose the internal space of the housing 100 together with the middle frame 101. The display screen 200 may be fixed to the side of the middle frame 101 facing away from the rear cover 102. The display screen 200 may integrate display function and touch sensing function. The display function of the display screen 200 is used to display images, videos, etc., and the touch sensing function of the display screen 200 is used to sense the user's touch actions to realize human-computer interaction. Exemplarily, the display screen 200 includes a flexible display screen that can be bent. Flexible displays can be made of liquid crystal display (LCD), organic light-emitting diode (OLED) displays, active-matrix organic light-emitting diode (AMOLED) displays, flexible light-emitting diode (FLED) displays, Mini LED displays, MicroLED displays, Micro-OLED displays, quantum dot light-emitting diode (QLED) displays, etc.

[0037] For example, the electronic device 1000 may further include a battery 300 and a circuit board assembly 400. Both the battery 300 and the circuit board assembly 400 may be installed within the interior space of the housing 100. The battery 300 may be electrically connected to the circuit board assembly 400. The battery 300 may serve as a power source for the electronic device, supplying power to the devices in the circuit board assembly 400 and other devices in the electronic device 1000.

[0038] Figure 3 yes Figure 2 The circuit diagram of the circuit board assembly 400, battery 300, and functional device 500 of the electronic device 1000 shown in some embodiments is illustrated. Figure 4 yes Figure 3 The circuit shown is an equivalent circuit diagram of the electronic device 1000 when it is in transport mode.

[0039] like Figures 2 to 4As shown, the circuit board assembly 400 may include a circuit board 10, a first switch 20, and a power management unit (PMU) chip 30. Both the first switch 20 and the power management chip 30 may be disposed on the circuit board 10. Both the first switch 20 and the power management chip 30 may be electrically connected to the circuit board 10. The circuit board 10 may have a battery power input terminal 11, a power output terminal 12, a first electrical connector 13, and a second electrical connector 14. The battery power input terminal 11 may be used to electrically connect to a battery 300. The first electrical connector 13 and the second electrical connector 14 may both be traces on the circuit board 10. In other embodiments, the first electrical connector 13 and / or the second electrical connector 14 may also be wires or other conductive structural components.

[0040] Exemplarily, the first switch 20 may include a first end 21 and a second end 22. A battery power input terminal 11 may be electrically connected to the first end 21. Exemplarily, the battery power input terminal 11 may be electrically connected to a first electrical connector 13, and the first end 21 of the first switch 20 may be electrically connected to the first electrical connector 13. The battery power input terminal 11 and the first end 21 of the first switch 20 can be electrically connected via the first electrical connector 13; that is, the first electrical connector 13 can be electrically connected between the battery power input terminal 11 and the first end 21 of the first switch 20. The second end 22 of the first switch 20 may be electrically connected to a power output terminal 12.

[0041] In this embodiment, the power management chip 30 may integrate a power module 32, a low-dropout regulator 33 (LDO), and a real-time clock module 34 (RTC). For simplicity, the low-dropout regulator 33 will be referred to as LDO 33, and the real-time clock module 34 will be referred to as RTC module 34. Exemplarily, the power output terminal 12 can be electrically connected to the input terminal 321 of the power module 32, and the power output terminal 12 can also be electrically connected to the input terminal 331 of the LDO 33.

[0042] For example, the power management chip 30 may include multiple pins. These pins can be soldered one-to-one to multiple solder points on the circuit board 10. Thus, by soldering the multiple pins of the power management chip 30 to the multiple solder points on the circuit board 10, the power management chip 30 can be mounted on the circuit board 10. At least some of the multiple pins of the power management chip 30 can also be electrically connected to traces on the circuit board 10 via solder points, thereby achieving electrical connection with other components. For example, the multiple pins of the power management chip 30 may include input pins 31. The input terminals 321 of the power module 32 and 331 of the LDO 33 can both be electrically connected to the input pins 31, and the input pins 31 can be electrically connected to the power output terminal 12. That is, the input terminals 321 of the power module 32 and 331 of the LDO 33 can both be electrically connected to the power output terminal 12 via the input pins 31.

[0043] In this embodiment, the battery power input terminal 11 can be electrically connected to the input terminal 341 of the RTC module 34, and the output terminal 332 of the LDO 33 can also be electrically connected to the input terminal 341 of the RTC module 34. Exemplarily, the power management chip 30 may also include a first pin 35 among its multiple pins. One end of the first pin 35 can be electrically connected to the output terminal 332 of the LDO 33 and the input terminal 341 of the RTC module 34, respectively. The end of the first pin 35 away from the LDO 33 can be electrically connected to the battery power input terminal 11. Exemplarily, the battery power input terminal 11 and the first pin 35 can be electrically connected via a second electrical connector 14. That is, the second electrical connector 14 can be electrically connected between the battery power input terminal 11 and the input terminal 341 of the RTC module 34. Thus, the battery 300 can supply power to the RTC module 34 via the second electrical connector 14 and the first pin 35.

[0044] In some embodiments, the circuit board assembly 400 may further include an energy storage module 50. The energy storage module 50 can be electrically connected to the output terminal 332 of the LDO 33 and the input terminal 341 of the RTC module 34, respectively. For example, the end of the first pin 35 furthest from the LDO 33 can be electrically connected to the energy storage module 50, thus allowing the energy storage module 50 to be electrically connected to both the output terminal 332 of the LDO 33 and the input terminal 341 of the RTC module 34 via the first pin 35. The energy storage module 50 can be used to store electrical energy. For example, the energy storage module 50 may include a capacitor 51. One end of the capacitor 51 can be electrically connected to the first pin 35, and the other end of the capacitor 51 can be grounded. When the battery 300 supplies power to the RTC module 34 through the second electrical connector 14 and the first pin 35, the energy storage module 50 can store a portion of the electrical energy. In this way, when the electronic device 1000 experiences a drop, collision, or other event that causes the second electrical connector 14 or other electrical connectors to temporarily loosen, resulting in a momentary power outage of the RTC module 34 (e.g., a power outage lasting a second), the energy storage module 50 can discharge, thereby maintaining the continuous operation of the RTC module 34 and improving the user experience.

[0045] In other embodiments, the energy storage module 50 may also include a resistor (not shown). The resistor may be connected in series with the capacitor 51. In some other embodiments, the energy storage module 50 may also take other forms, consisting of one or more electronic components. This application does not limit the specific form of the energy storage module 50.

[0046] Please refer to it again. Figures 2 to 4 The electronic device 1000 may also include several functional devices 500. The functional devices 500 may be installed inside the housing 100 and electrically connected to the power output terminal 12 of the circuit board 10. The functional devices 500 may include, but are not limited to, motors (e.g., vibration motors, camera motors, etc.), buttons, speakers, sensors, etc. The circuit board 10 may also have multiple output interfaces (not shown). All output interfaces can be electrically connected to the power output terminal 12. Multiple functional devices 500 can be electrically connected to the power output terminal 12 through the multiple output interfaces in a one-to-one correspondence. The display screen 200 may also be used as a functional device 500, electrically connected to the power output terminal 12 of the circuit board 10 through a corresponding output interface. In this case, the functional device 500 can be electrically connected to the second terminal 22 of the first switch 20 through the power output terminal 12 of the circuit board 10. It should be understood that... Figure 3 Only some of the functional components 500 are shown in the diagram.

[0047] For example, the circuit board assembly 400 may also include other functional modules 40 besides the power management chip 30. Figure 2Only a portion of the functional module 40 is shown in the figure. Functional module 40 can be mounted on circuit board 10. Functional module 40 can be electrically connected to power output terminal 12. Exemplarily, functional module 40 may include a secondary power management chip, an amplifier, a controller, etc. The amplifier may include a smart power amplifier (Smart PA), an average power tracking RF amplifier (AET), an envelope tracking RF amplifier (ET), etc. Circuit board assembly 400 may also include a controller (not shown). The controller can be mounted on circuit board 10. The controller can be electrically connected to the first switch 20. The controller can be used to control the first switch 20 to open or close.

[0048] like Figures 2 to 4 As shown, the electronic device 1000 may include a transport mode and a non-transport mode. When the electronic device 1000 is in transport mode, the controller can control the first switch 20 to open. At this time, the power of the battery 300 cannot be transmitted sequentially through the first electrical connector 13, the first switch 20, and the power output terminal 12 to the power management chip 30, the functional device 500, and other functional modules 40. Some modules within the power management chip 30 of the electronic device 1000 (e.g., the power module 32 of the power management chip 30), the functional device 500, and other functional modules 40 are all in a power-off state. The power of the battery 300 can be transmitted to the RTC module 34. For example, the power of the battery 300 can be transmitted sequentially through the second electrical connector 14 and the first pin 35 to the RTC module 34. The RTC module 34 can be in an operating state. That is, when the electronic device 1000 is in transport mode, the battery 300 will not supply power to some modules of the power management chip 30, functional devices 500, and other functional modules 40 through the power output terminal 12 via the first electrical connector 13. The battery 300 will only supply power to the RTC module 34 through the second electrical connector 14. In some embodiments, when the electronic device 1000 is in transport mode, the battery 300 can also supply power to other devices / modules electrically connected to the LDO 33 via the second electrical connector 14.

[0049] For example, when the electronic device 1000 is in non-transportation mode (i.e., when the electronic device 1000 exits transportation mode), the controller can control the first switch 20 to open. At this time, the electrical energy of the battery 300 can be transmitted sequentially to the functional device 500 and the functional module 40 through the first electrical connector 13, the first switch 20, and the power output terminal 12. The functional device 500 and the functional module 40 can be in an active state. The electrical energy of the battery 300 can also be transmitted to the RTC module 34 through the second electrical connector 14. The RTC module 34 can be in an active state. That is, when the electronic device 1000 is in non-transportation mode, the battery 300 can simultaneously supply power to the functional device 500, the functional module 40, and the RTC module 34. When the electronic device 1000 is in non-transportation mode, the electronic device 1000 can be in an on or off state. Whether the electronic device 1000 is powered on or off, the battery 300 can supply power to at least some of the functional devices 500 and functional modules 40 to maintain the normal operation of those functional devices 500 and functional modules 40.

[0050] Understandably, typical electronic devices connect the input terminals of the RTC module and other functional devices / modules to the power output terminal so that the battery can power these devices / modules and the RTC module. A first switch connects the power output terminal and the battery power input terminal. When the electronic device detects that the user has not used the phone for a period of time, to prevent the battery from over-discharging and causing problems such as swelling or bulging, the electronic device will actively switch to transport mode. When the electronic device is in transport mode, the first switch will open, creating an open circuit between the battery power input terminal and the power output terminal. At this time, the RTC module and other functional devices / modules will be powered down, preventing them from maintaining normal operation. Power loss from the RTC module will cause the electronic device's clock to revert to its default value, affecting normal user operation. The circuit board assembly 400 in this embodiment also includes a second electrical connector 14. The second electrical connector 14 can be electrically connected between the battery power input terminal 11 and the output terminal of the RTC module 34. In this way, whether the electronic device 1000 is in transport mode or not, the battery 300 can supply power to the RTC module 34 through the second electrical connector 14. In other words, by setting the second electrical connector 14 to electrically connect between the battery power input terminal 11 and the RTC input terminal, this application enables the battery 300 to still supply power to the RTC module 34 even when the electronic device 1000 is in transport mode, thereby effectively extending the operating time of the RTC module 34 and improving the user experience.

[0051] Secondly, in this embodiment, the circuit board assembly 400 may further include a power management chip 30. The power management chip 30 may include an LDO 33, an input pin 31, and a first pin 35. The RTC module 34 may be integrated into the power management chip 30. The input terminal 331 of the LDO 33 may be electrically connected to the input pin 31, and the input pin 31 may be electrically connected to the power output terminal 12. The output terminal 332 of the LDO 33 may be electrically connected to the input terminal 341 of the RTC module 34. The output terminal 332 of the LDO 33 may also be electrically connected to the first pin 35. The first pin 35 may be used to ground the LDO 33 and the RTC module 34. Based on this, in this embodiment, one end of the second electrical connector 14 is electrically connected to the battery power input terminal 11, and the other end of the second electrical connector 14 is electrically connected to the first pin 35. In this way, by directly connecting the second electrical connector 14 between the battery power input terminal 11 and the first pin 35, the operating time of the RTC module 34 can be extended by simply adding a second electrical connector 14 without making any modifications to the circuitry of the power management chip 30 itself, thus effectively reducing the manufacturing cost of the circuit board assembly 400.

[0052] It should be noted that in this embodiment, when discussing the power supply of other devices / modules by the battery 300 when the electronic device 1000 is in a transport state or a non-transport state, the battery 300 is always in a state where it has electrical energy and is capable of providing normal power supply. It should be understood that... Figure 2 The circuit board assembly 400 shown has diverse structures and shapes. The power management chip 30, several functional devices 500 and several functional modules 40 disposed on the circuit board 10 of the circuit board assembly 400 also have diverse arrangements. This application does not make specific limitations on these arrangements.

[0053] It should be noted that, unless otherwise specified in this embodiment, the electrical connection between A and B can be a direct electrical connection between A and B, or an electrical connection between A and B can be achieved through conductive structural components such as metal layers on circuit board 10, traces on circuit board 10, additional wires, and solder joints on circuit board 10.

[0054] In some embodiments, the battery power input terminal 11 can be electrically connected to the input terminal 331 of the LDO 33. For example, the battery power input terminal 11 and the input terminal 331 of the LDO 33 can be electrically connected via a second electrical connector 14. In this way, the voltage input from the battery 300 to the RTC module 34 can be stepped down by the LDO 33. The LDO 33 can reduce the output voltage of the battery 300 while ensuring the stability of the output voltage, which is beneficial to improving the operational stability of the RTC module. For example, the power management chip 30 may also include a second pin 36. The input terminal 331 of the LDO 33 can be electrically connected to the second pin 36, and the battery power input terminal 11 can be electrically connected to the input terminal 331 of the LDO 33 via the second pin 36.

[0055] In some embodiments, the circuit board assembly 400 may not include the power management chip 30. In this case, the RTC module 34 can be independently mounted on the circuit board 10. The second electrical connector 14 can be electrically connected between the battery power input terminal 11 and the input terminal 341 of the RTC module 34.

[0056] Please refer to it again. Figures 2 to 4 In some embodiments, the circuit board assembly 400 may further include a buck charging chip 60. The buck charging chip 60 may include a second switch 61 and a control module 62. The first switch 20 may be integrated into the buck charging chip 60. The control module 62 may be electrically connected to the first switch 20 and the second switch 61. The control module 62 may be used to control the first switch 20 and the second switch 61. That is, the control module 62 may constitute a controller for controlling the first switch 20. Both the first switch 20 and the second switch 61 may be field-effect transistors.

[0057] For example, the circuit board 10 may also include a USB interface 15. The USB interface 15 can be used to electrically connect to an external power source. The second switch 61 may include a third terminal 611 and a fourth terminal 612. The third terminal 611 can be electrically connected to the USB interface 15. The fourth terminal 612 can be electrically connected to the power output terminal 12. When the USB interface 15 is connected to an external power source, the external power source can charge the battery 300 of the electronic device 1000 and / or the electrical energy of the external power source can supply power to the functional devices 500, functional modules 40, and other components of the electronic device 1000 through the power output terminal 12. Specifically, when both the first switch 20 and the second switch 61 are open, the electrical energy of the external power source can be sequentially transmitted to the battery 300 through the second switch 61, the first switch 20, the first electrical connector 13, and the battery power input terminal 11 to charge the battery 300.

[0058] It is understood that the circuit board assembly 400 in this embodiment may also include a step-down charging chip 60. The first switch 20 may be integrated into the step-down charging chip 60. In this way, the first switch 20 can be used both in scenarios where an external power source charges the battery 300 and in scenarios where the electronic device 1000 switches between transportation mode and non-transportation mode, thus achieving "multi-purpose functionality." This helps to reduce the cost of the circuit board assembly 400.

[0059] In some embodiments, the first switch 20 may not be integrated with the buck charging chip 60, meaning the first switch 20 can be independent of the buck charging chip 60. In this case, the first switch 20 can be disposed on the circuit board 10 to switch the electronic device 1000 between transport mode and non-transport mode. The buck charging chip 60 may also include a third switch (not shown). One end of the third switch can be electrically connected to the power output terminal 12, and the other end can be electrically connected to the battery power input terminal 11. The control module 62 of the buck charging chip 60 can be electrically connected to the third switch. The control module 62 can be used to control the second switch 61 and the third switch.

[0060] Figure 5 yes Figure 3 The circuit diagram shown is a circuit diagram of another embodiment. Figure 6 yes Figure 5 The circuit shown is the equivalent circuit diagram of the electronic device 1000 when it is in transport mode.

[0061] like Figure 5 and Figure 6 As shown, the circuitry between the circuit board assembly 400, the battery 300, and the functional device 500 in this embodiment is interconnected. Figure 3 The circuits shown are largely the same, and the identical parts will not be described again. The main differences between the two are described below. For example, the input terminal 331 of LDO 33 can be electrically connected to the battery power input terminal 11. For example, the battery power input terminal 11 can be electrically connected to the second electrical connector 14, and the input terminal 331 of LDO 33 can also be electrically connected to the second electrical connector 14. The battery power input terminal 11 and the input terminal 331 of LDO 33 can be electrically connected through the second electrical connector 14; that is, the battery power input terminal 11 and the input terminal 331 of LDO 33 can be electrically connected through the second electrical connector 14. There may be no electrical connection between the input terminal 331 of LDO 33 and the power module 32. Thus, regardless of whether the electronic device 1000 is in transport mode or non-transport mode, the battery 300 can be transmitted to the RTC module 34 sequentially through the battery power input terminal 11, the second electrical connector 14, and the LDO 33.

[0062] For example, the power management chip 30 may also include a second pin 36 among its pins. The input terminal 331 of the LDO 33 may be electrically connected to the second pin 36. The end of the second pin 36 away from the LDO 33 may be electrically connected to the second electrical connector 14, that is, the input terminal 331 of the LDO 33 and the second electrical connector 14 may be electrically connected through the second pin 36.

[0063] It is understood that the power management chip 30 in this embodiment also includes a second pin 36. The second pin 36 can be electrically connected to the input terminal 331 of the LDO 33. The second electrical connector 14 can be electrically connected between the battery power input terminal 11 and the second pin 36. In this way, by adding a second pin 36 to the power management chip 30, the power of the battery 300 can be directly transmitted to the RTC module 34 in sequence through the second electrical connector 14, the second pin 36, and the LDO 33. The power supply of the RTC module 34 is not affected by the first switch 20, so that the RTC module 34 can work normally even when the electronic device 1000 is in transport mode, which is beneficial to improving the user experience. Secondly, compared to the LDO 33, whose input terminal 331 is also electrically connected to other devices such as the power module 32, in this embodiment, the LDO 33's input terminal 331 is only electrically connected to the second pin 36 and not to any other devices. This effectively prevents a portion of the current from the battery 300 from flowing to other devices through the LDO 33 when the first switch 20 is turned off, thus avoiding current loss and extending the operating time of the RTC module 34. For example, by electrically connecting only the second pin 36 and the input terminal 341 of the RTC module 34, the LDO 33 can reduce leakage current by 70%-80%.

[0064] It should be noted that, in the absence of conflict, the features in the embodiments of this application can be combined with each other, and any combination of features in different embodiments is also within the protection scope of this application. That is to say, the multiple embodiments described above can also be arbitrarily combined according to actual needs.

[0065] It should be noted that all the above figures are exemplary illustrations of this application and do not represent the actual size of the product. Furthermore, the dimensional proportions between the components in the figures are not intended to limit the actual product of this application.

[0066] The above are merely some embodiments of this application, and the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A circuit board assembly (400), characterized in that, The device includes a circuit board (10), a first switch (20), and an RTC module (34). The first switch (20) and the RTC module (34) are both disposed on the circuit board (10). The circuit board (10) has a battery power input terminal (11), a power output terminal (12), a first electrical connector (13), and a second electrical connector (14). The first switch (20) includes a first end (21) and a second end (22). The battery power input end (11) is electrically connected to the first end (21) through the first electrical connector (13). The second end (22) is electrically connected to the power output end (12). The battery power input end (11) is electrically connected to the RTC module (34) through the second electrical connector (14).

2. The circuit board assembly (400) according to claim 1, characterized in that, The circuit board assembly (400) further includes an LDO (33), which is disposed on the circuit board (10), and the output terminal (332) of the LDO (33) is electrically connected to the input terminal (341) of the RTC module (34).

3. The circuit board assembly (400) according to claim 2, characterized in that, The circuit board assembly (400) also includes a power management chip (30), which is disposed on the circuit board (10). The RTC module (34) and the LDO (33) are both integrated into the power management chip (30).

4. The circuit board assembly (400) according to claim 3, characterized in that, The input terminal (331) of the LDO (33) is electrically connected to the power output terminal (12), and the output terminal (332) of the LDO (33) and the input terminal (341) of the RTC module (34) are both electrically connected to the second electrical connector (14).

5. The circuit board assembly (400) according to claim 4, characterized in that, The power management chip (30) further includes a first pin (35), one end of which is electrically connected to the output terminal (332) of the LDO (33) and the input terminal (341) of the RTC module (34), and the end of the first pin (35) away from the LDO (33) is electrically connected to the second electrical connector (14).

6. The circuit board assembly (400) according to claim 3, characterized in that, The input terminal (331) of the LDO (33) is electrically connected to the battery power input terminal (11) through the second electrical connector (14).

7. The circuit board assembly (400) according to claim 6, characterized in that, The power management chip (30) also includes a second pin (36), and the LDO (33) input terminal (331) is electrically connected to the second electrical connector (14) through the second pin (36).

8. The circuit board assembly (400) according to any one of claims 2 to 7, characterized in that, The circuit board assembly (400) also includes an energy storage module (50), and the output terminal (332) of the LDO (33) and the input terminal (341) of the RTC module (34) are both electrically connected to the energy storage module (50).

9. The circuit board assembly (400) according to any one of claims 1 to 8, characterized in that, The circuit board (10) also includes a USB interface (15) and a step-down charging chip (60). The USB interface (15) is used to electrically connect to an external power source, and the first switch (20) is integrated into the step-down charging chip (60).

10. The circuit board assembly (400) according to claim 9, characterized in that, The step-down charging chip (60) also includes a second switch (61) and a control module (62). The second switch (61) includes a third terminal (611) and a fourth terminal (612). The third terminal (611) is electrically connected to the USB interface (15), and the fourth terminal (612) is electrically connected to the power output terminal (12). The control module (62) is electrically connected to the first switch (20) and the second switch (61), and the control module (62) is used to control the first switch (20) and the second switch (61).

11. An electronic device (1000), characterized in that, It includes a battery (300), a functional device (500), and a circuit board assembly (400) according to any one of claims 1 to 10, wherein the battery (300) is electrically connected to the battery power input terminal (11), and the functional device (500) is electrically connected to the power output terminal (12).

12. The electronic device (1000) according to claim 11, characterized in that, The electronic device (1000) has a transport mode and a non-transport mode. When the electronic device (1000) is in the transport mode, the first switch (20) is turned off, and the battery (300) supplies power to the RTC module (34) through the second electrical connector (14). When the electronic device (1000) is in non-transportation mode, the first switch (20) is connected, the battery (300) supplies power to the functional device (500) through the first electrical connector (13), and the battery (300) also supplies power to the RTC module (34) through the second electrical connector (14).

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