CN115622198A

CN115622198A - Electronic equipment with wireless charging function

Info

Publication number: CN115622198A
Application number: CN202211414000.7A
Authority: CN
Inventors: 程海龙; 张佳; 黄祖庆; 荆伟
Original assignee: Shanghai Qinyun Electronic Technology Co ltd
Current assignee: Shanghai Qinyun Electronic Technology Co ltd
Priority date: 2022-11-11
Filing date: 2022-11-11
Publication date: 2023-01-17

Abstract

The application discloses electronic equipment with wireless function of charging relates to circuit technical field. The electronic device includes: the wireless charging system comprises a wireless charging receiving module, a first switch module, a second switch module, a charging chip, a battery and a main chip; the charging chip is used for controlling the first switch module to be in a conducting state when the wireless charging mode is confirmed, so that a charging channel from the wireless charging receiving module to the battery is formed; when the OTG mode is confirmed to be in the data exchange OTG mode, controlling the first switch module to be in a cut-off state; the main chip is used for controlling the working state of the second switch module, and controlling the second switch module to be in a conducting state when the main chip is in a data exchange OTG mode, so that a power supply channel from the battery to the wireless charging receiving module is formed; when the wireless charging mode is in, the second switch module is in a cut-off state. Thus, the problem of power supply circulation in a wireless charging mode or an OTG mode can be solved.

Description

Electronic equipment with wireless charging function

Technical Field

The present application relates to the field of circuit technology, and in particular, to an electronic device with a wireless charging function.

Background

At present, electronic devices generally have a wireless charging function. The wireless charging function is that the receiving module of wireless charging inputs power to the electronic equipment to supply power to the battery in the electronic equipment. However, in order for the wireless charging and receiving module to match the battery voltage of the electronic device, the wireless charging and receiving module needs to upgrade Firmware (FW). When upgrading FW, particularly in an on-the-go (OTG) mode, a battery in the electronic equipment supplies power to the wireless charging receiving module, and then upgrading FW is realized. When the battery in the electronic equipment supplies power to the wireless charging receiving module, the wireless charging receiving module receives the power and then leaks the power to the battery of the electronic equipment, so that the problem of power supply circulation is solved. However, in the wireless charging mode, when the wireless charging receiving module supplies power to the battery, the battery may leak power to the wireless charging receiving module after receiving the power, and a problem of power supply circulation is also caused.

Therefore, how to avoid power supply circulation in the wireless charging mode or the OTG mode is an urgent problem to be solved.

Disclosure of Invention

The application provides an electronic equipment with wireless function of charging for solve and fill the mode at wireless, or the power supply cycle problem that appears in the OTG mode.

In a first aspect, the present application provides an electronic device comprising: the wireless charging system comprises a wireless charging receiving module, a first switch module, a second switch module, a charging chip, a battery and a main chip; the wireless charging receiving module is respectively and electrically connected with the first end of the first switch module and the first end of the second switch module; the charging chip is electrically connected with the second end of the first switch module and the second end of the second switch module respectively; the charging chip is also electrically connected with the battery; the charging chip is used for controlling the first switch module to be in a conducting state when the wireless charging mode is confirmed, so that a charging channel from the wireless charging receiving module to the battery is formed; when the OTG mode is confirmed to be in the data exchange OTG mode, controlling the first switch module to be in a cut-off state; the main chip is used for controlling the working state of the second switch module, and controlling the second switch module to be in a conducting state when the main chip is in a data exchange OTG mode, so that a power supply channel from the battery to the wireless charging receiving module is formed; when the wireless charging mode is in, the second switch module is in a cut-off state.

In the technical scheme, when the wireless charging mode is adopted, the first switch module is in a conducting state, and the second switch module is in a stopping state, so that a charging channel from the wireless charging receiving module to the battery is formed. The second switch module is in a cut-off state, so that the phenomenon that the battery leaks to the wireless charging receiving module in the charging channel can not occur; and when the OTG mode, the second switch module is in the on-state, and first switch module is in the off-state, forms the power supply passageway from battery to wireless receiving module that fills. Because the first switch module is in a cut-off state, the phenomenon that the electricity leaks from the wireless charging receiving module to the battery cannot occur in the power supply channel. Thus, the problem of power supply circulation in a wireless charging mode or in an OTG mode is solved.

In one possible design, the electronic device further includes: the third switch module is electrically connected with the charging chip; the main chip is also used for controlling the third switch module to be conducted when the wireless charging mode is adopted; the third switch module is used for outputting a trigger signal to the charging chip when the charging chip is conducted; and the charging chip is used for confirming that the charging chip is in a wireless charging mode after receiving the trigger signal, and confirming that the charging chip is in an OTG mode when not receiving the trigger signal.

In the technical scheme, when the third switch module is turned on, the third switch module outputs a trigger signal to the charging chip, and the charging chip confirms that the charging chip is in a wireless charging mode after receiving the trigger signal; if the charging chip does not receive the trigger signal, the charging chip confirms that the charging chip is in the OTG mode, so that the charging chip can effectively confirm whether the charging chip is in the wireless charging mode or the OTG mode according to whether the trigger signal is received.

In one possible design, the third switch module includes a first switch; two ends of the first switch are respectively and electrically connected with the wireless charging receiving module and the charging chip; the first switch is used for being in a conducting state or a cut-off state according to a first control signal output by the main chip; the first switch is also used for outputting a power input detection signal to the charging chip as a trigger signal when the charging chip is conducted.

In the above technical scheme, if the first switch is in a conducting state, the power input detection signal is output to the charging chip as a trigger signal; if the first switch is in the off state, the power input detection signal is not output to the charging chip, so that the charging chip confirms whether the charging chip is in the wireless charging mode or the OTG mode through the state of the first switch.

In one possible design, the third switch module further includes a second switch; two ends of the second switch are respectively and electrically connected with the first switch module and the charging chip; the second switch is used for being in a conducting state or a cut-off state according to the first control signal output by the main chip; and the second switch is also used for outputting a current upper limit signal to the charging chip as a trigger signal when the charging chip is conducted.

In the above technical solution, if the second switch is in the on state, the current upper limit signal is output to the charging chip as the trigger signal; if the second switch is in a cut-off state, the current upper limit signal is not output to the charging chip, and therefore the charging chip confirms whether the charging chip is in a wireless charging mode or an OTG mode through the state of the second switch.

In one possible design, the charging chip is specifically configured to control the first switch module to be in a conducting state when the charging requirement is determined to be met according to the power input detection signal and the output current upper limit signal.

In the above technical scheme, if the charging chip determines that the charging requirement is met according to the power input detection signal and the output current upper limit signal, the first switch module is controlled to be in a conducting state, otherwise, the first switch module is controlled to be in a cut-off state. Under the condition that the charging requirement is not met, the charging chip controls the first switch module to be in a cut-off state, and therefore the battery is protected from being damaged.

In one possible design, the electronic device further includes a fourth switch module and a universal serial bus USB interface; two ends of the fourth switch module are respectively and electrically connected with the USB interface and the charging chip; and the fourth switching module is used for being in a conducting state or a cut-off state according to the second control signal output by the main chip.

In the above technical solution, if the fourth switch module is in a conducting state, a charging channel from the USB interface to the battery is formed, so that the electronic device further has a wired charging function.

In one possible design, the charging chip has a single general purpose input/output port GPIO; the GPIO is used for outputting a control signal indicating on or off to the first switch module.

Among the above-mentioned technical scheme, the state of charging chip through single GPIO control first switch module for when the OTG mode, can not appear by the wireless problem of charging receiving module electric leakage and giving the battery, and then can avoid appearing the power supply circulation problem.

In one possible design, the first switch module and the second switch module are electrically connected with the wireless charging receiving module based on the same PIN PIN.

In the technical scheme, the first switch module and the second switch module are electrically connected with the wireless charging receiving module based on the same PIN PIN, so that the circuit simplification effect of the wireless charging connector is achieved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic diagram of an internal architecture of an electronic device with a wireless charging function according to an embodiment of the present disclosure;

fig. 2 is a schematic diagram of an internal architecture of another electronic device with a wireless charging function according to an embodiment of the present application;

fig. 3 is a schematic diagram of an internal architecture of another electronic device with a wireless charging function according to an embodiment of the present disclosure;

fig. 4 is an operation diagram of a first switch according to an embodiment of the present disclosure;

fig. 5 is an operation diagram of a second switch according to an embodiment of the present disclosure;

fig. 6 is a schematic diagram of a charging chip according to an embodiment of the present disclosure;

fig. 7 is an operation diagram of a second switch module according to an embodiment of the present disclosure;

fig. 8 is a schematic diagram of an internal architecture of another electronic device with a wireless charging function according to an embodiment of the present application;

fig. 9 is a schematic diagram of a wired charging operation according to an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be described in further detail with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Fig. 1 schematically illustrates an internal architecture diagram of an electronic device with a wireless charging function according to an embodiment of the present application, where as shown in fig. 1, the electronic device includes: the wireless charging system comprises a wireless charging receiving module 100, a first switch module 200, a second switch module 300, a charging chip 400, a battery 500 and a main chip 600, wherein the wireless charging receiving module 100 is respectively electrically connected with a first end of the first switch module 200 and a first end of the second switch module 300, the charging chip 400 is respectively electrically connected with a second end of the first switch module 200 and a second end of the second switch module 300, the charging chip 400 is further electrically connected with the battery 500, and the main chip 600 is electrically connected with the second switch module 300.

The charging chip 400 is configured to control the first switch module 200 to be in a conducting state when the wireless charging mode is determined, so as to form a charging channel from the wireless charging receiving module 100 to the battery 500; when the OTG mode is confirmed, the first switch module 200 is controlled to be in a cut-off state;

the main chip 600 is configured to control a working state of the second switch module 300, and when the second switch module 300 is in the data exchange OTG mode, the second switch module 300 is in a conducting state, so as to form a power supply channel from the battery 500 to the wireless charging and receiving module 100; when in the wireless charging mode, the second switch module 300 is in an off state.

It should be understood that the electronic device may be a mobile phone, a tablet, or the like, and the embodiment of the present application is not particularly limited thereto.

In one example, when the charging chip 400 confirms that the wireless charging mode is performed, the charging chip 400 controls the first switch module 200 to be in a conducting state, so that a charging channel from the wireless charging receiving module 100, the first switch module 200, the charging chip 400 to the battery 500 is formed. In the wireless charging mode, the second switch module 300 may be in an off state, specifically, the main chip 600 may control the second switch module 300 to be in the off state, or the initial state of the second switch module 300 may be in the off state. The initial state is then controlled by the main chip 600. In a feasible manner, in the charging channel, the wireless charging receiving module outputs a voltage of 9V, and the voltage of 9V is input to the battery 500 through the first switch module 200 and the charging chip 400, so that the wireless charging receiving module 100 charges the battery 500.

In another example, when the charging chip 400 confirms that the charging chip is in the OTG mode, the charging chip 400 controls the first switch module 200 to be in the off state, and at this time, the second switch module 300 is in the on state, so that a power supply channel from the battery 500, the charging chip 400, the second switch module 300 to the wireless charging and receiving module 100 is formed. Specifically, the second switch module 300 may be in a conducting state, the second switch module 300 may be controlled to be in the conducting state by the main chip 600, or the initial state of the second switch module 300 may be in the conducting state. The initial state is then controlled by the main chip 600. In a feasible manner, in the power supply channel, the battery 500 outputs a voltage of 5V, and the voltage of 5V is input to the wireless charging and receiving module 100 through the charging chip 400 and the second switch module 300, so that the battery 500 supplies power to the wireless charging and receiving module 100.

In the technical scheme, when the wireless charging mode is adopted, the first switch module is in a conducting state, and the second switch module is in a stopping state, so that a charging channel from the wireless charging receiving module to the battery is formed. The second switch module is in a cut-off state, so that the phenomenon that the battery leaks to the wireless charging receiving module in the charging channel can not occur; and when the OTG mode, the second switch module is in the on-state, and first switch module is in the off-state, forms the power supply passageway from battery to wireless receiving module that fills. Because the first switch module is in a cut-off state, the phenomenon that the electricity leaks from the wireless charging receiving module to the battery cannot occur in the power supply channel. Thus, the problem of power supply circulation in a wireless charging mode or an OTG mode is solved.

One way to implement how the charging chip 400 confirms whether it is in the wireless charging mode or the OTG mode is based on the control of the main chip 600. If the main chip 600 can determine the current state of the electronic device through the operation of the user on the electronic device, if the user needs to use the wireless charging function, the wireless charging function is turned on the electronic device, so that the main chip 600 can know that the electronic device is in the wireless charging mode and send a notification signal for turning on the wireless charging mode to the charging chip 400; if the user needs to upgrade the firmware of the wireless charging receiving module 100, the firmware upgrading function is started on the electronic device, so that the main chip 600 can know that the electronic device should be in the OTG mode, and then sends a notification signal of starting the OTG mode to the charging chip 400.

The embodiment of the present application further provides another implementation mechanism, for example, in the electronic device shown in fig. 2, a third switch module 700 is added on the basis of fig. 1, two ends of the third switch module 700 are respectively electrically connected to the charging chip 400 and the main chip 600, where the main chip 600 is further configured to control the third switch module 700 to be turned on when the electronic device is in a wireless charging mode; the third switching module 700 is configured to output a trigger signal to the charging chip 400 when turned on; the charging chip 400 is configured to confirm that the charging chip is in the wireless charging mode after receiving the trigger signal, and confirm that the charging chip is in the OTG mode when not receiving the trigger signal.

In the above implementation mechanism, by introducing the third switch module 700, the main chip 600 controls the working state of the third switch module 700 to output the trigger signal. Specifically, the third switching module 700 may be connected to a channel or a signal source, and when the third switching module 700 is turned on, a signal of the channel or the signal source is sent to the charging chip 400 as a trigger signal. In one example, in the wireless charging mode, the main chip 600 outputs a control signal to the third switch module 700, and after the third switch module 700 receives the control signal output by the main chip 600, the third switch module 700 is in a conducting state. When the third switching module 700 is in a conducting state, the third switching module 700 outputs a trigger signal to the charging chip 400, and after the charging chip 400 receives the trigger signal output by the third switching module 700, the charging chip 400 confirms that the charging chip is in a wireless charging mode. If the charging chip 400 does not receive the trigger signal output by the third switch module 700, the charging chip 400 confirms that the charging chip is in the non-OTG mode.

For a trigger signal generation mechanism, the embodiments of the present application provide the following several implementation manners:

first, as shown in fig. 3, the third switch module 700 includes a first switch 701, two ends of the first switch 701 are respectively electrically connected to the wireless charging receiving module 100, the charging chip 400 and the main chip 600, wherein the first switch 701 is configured to be in an on state or an off state according to a first control signal output by the main chip 600; the first switch 701 is further configured to output a power input detection signal as a trigger signal to the charging chip when turned on.

Fig. 4 exemplarily shows an operation diagram of a first switch provided in the embodiment of the present application, as shown in fig. 4, the first switch 701 receives a first control signal output by the main chip output 600, if the first control signal is at a low level, the first switch 701 is in a conducting state, the first switch 701 receives a 9V voltage signal output by the wireless charging receiving module 100, and the first switch 701 outputs a power input detection signal as a trigger signal to the charging chip 400 according to the received 9V voltage signal; if the first control signal is at a high level, the first switch 701 is in an off state.

Secondly, as shown in fig. 3, the third switch module 700 includes a second switch 702, and the second switch 702 is electrically connected to the first switch module 200, the charging chip 400, and the main chip 600, wherein the second switch 702 is configured to be in an on state or an off state according to the first control signal output by the main chip 600; the second switch 702 is further configured to output the current upper limit signal to the charging chip as a trigger signal when turned on.

Fig. 5 exemplarily shows an operation diagram of a second switch provided by the embodiment of the present application, as shown in fig. 5, the second switch 702 receives a first control signal output by the main chip 600, if the first control signal is at a low level, the second switch 702 is in a conducting state, and when the second switch 702 is in the conducting state, the second switch 702 receives a 0.96V voltage signal output by the first switch module 200, where the 0.96V voltage signal output by the first switch module 200 is obtained by dividing a 9V voltage signal output by the wireless charging receiving module 100 through a resistor. Note that, in the voltage signal obtained by resistance division, the voltage signal is set at [0V:40mV:1.2V ], and then the voltage signal [0V:40mV:1.2v ] corresponding current signals are measured at [0A:50mA:1.5A ], for example, when a voltage signal obtained by resistance division is 40mV, a corresponding current signal is 50mA.

Further, the second switch 702 outputs a current upper limit signal to the charging chip 400 as a trigger signal according to the received 0.96V voltage signal, where the current upper limit signal includes a 1.2A current signal obtained according to the 0.96V voltage signal; if the first control signal received by the second switch 702 and output by the main chip 600 is at a high level, the second switch 702 is in an off state.

The third and fourth switch modules 700 include the first switch 701 and the second switch 702 of the first and second modes. Further, the charging chip 400 is specifically configured to control the first switch module 200 to be in a conducting state when it is determined that the charging requirement is met according to the power input detection signal output by the first switch 701 and the current upper limit signal output by the second switch 702.

The charging chip 400 has a power management function, and the charging chip 400 determines whether the power is within a preset power range according to the received signal, so as to determine whether the charging requirement for the battery 500 is met, so that the battery 500 is not damaged due to power overload, and the battery protection function is further performed. However, the more pins of the charging chip 400, the higher the cost, so the embodiment of the present application provides a charging chip 400 having a single general purpose input/output port GPIO, wherein the GPIO is used to output a control signal indicating on or off to the first switch module 200.

Fig. 6 exemplarily shows an operation diagram of a charging chip according to an embodiment of the present application, as shown IN fig. 6, the charging chip 400 receives a power input detection signal output by a first switch 701 and a current upper limit signal output by a second switch 702, and the charging chip 400 determines whether a charging requirement is met according to the received power input detection signal output by the first switch 701 and the current upper limit signal output by the second switch 702, and if the charging requirement is met, the charging chip 400 outputs a high-level signal DC _ IN _ EN to the first switch module 200, so as to control the first switch module 200 to be IN a conducting state; if the electric chip 400 determines that the charging requirement is not met, or the charging chip 400 does not receive the power input detection signal output by the first switch 701 and the current upper limit signal output by the second switch 702, the charging chip 400 outputs a low-level signal DC _ IN _ EN to the first switch module 200, thereby controlling the first switch module 200 to be IN a cut-off state. The charging chip 400 has a single general purpose input/output port GPIO, and the port GPIO is used to output a control signal indicating on or off to the first switch module 200.

In one example, when the charging requirement is set in the charging chip 400 to be about 10W, the charging chip 400 confirms the wireless charging mode. If the charging chip 400 recognizes a voltage signal of 9V according to the received power input detection signal output by the first switch 701 and the received current upper limit signal output by the second switch 702, the current signal is 1.2A, and the power is 10.8W, the charging chip 400 determines that the charging requirement is met, and determines that the charging mode is the wireless charging mode. After the charging chip 400 confirms that the charging requirement is met and confirms that the wireless charging mode is established, the charging chip 400 outputs a signal DC _ IN _ EN to the first switch module 200 through the port GPIO, wherein the signal DC _ IN _ EN is at a high level, and after the first switch module 200 receives the signal DC _ IN _ EN output by the charging chip 400, the first switch module 200 is IN a conducting state.

In another example, the main chip 600 outputs a first control signal to the first switch 701 and the second switch 702, wherein the first control signal is at a high level, and the first switch 701 and the second switch 702 are in an off state. The charging chip 400 determines that the charging chip is IN the OTG mode, the charging chip 400 outputs a signal DC _ IN _ EN to the first switch module 200 through the port GPIO, where the signal DC _ IN _ EN is at a low level, and after the first switch module 200 receives the low-level signal DC _ IN _ EN output by the charging chip 400, the first switch module 200 is IN an off state.

Optionally, when the first control signal output by the main chip 600 to the first switch 701 and the second switch 702 is at a high level, the first switch 701 and the second switch 702 are in an off state, the charging chip 400 confirms that the charging chip is in the OTG mode, and the main chip 600 controls the second switch module 300 to be in an on state, so that a power supply channel from the battery 500 to the wireless charging and receiving module 100 is formed, so that the battery 500 can supply power to the wireless charging and receiving module 100.

Fig. 7 exemplarily shows an operation schematic diagram of a second switch module provided by the embodiment of the present application, as shown in fig. 7, in an example, when the charging chip 400 confirms that the charging chip is in the OTG mode, the second switch module 300 receives a signal WIRELESSA _ FLAG output by the main chip 600, and after the second switch module 300 receives a signal WIRELESSA _ FLAG output by the main chip 600, the second switch module 300 is in a conducting state according to the received signal WIRELESSA _ FLAG. In this way, the battery 500 outputs a voltage of 5V to the wireless charging/receiving module 100 through the charging chip 400 and the second switching module 300, so that the battery 500 supplies power to the wireless charging/receiving module 100. Wherein the signal WIRELESSA _ FLAG is a transmitted power signal.

Optionally, as shown in fig. 8, the electronic device further includes a fourth switch module 800 and a universal serial bus USB interface 900, two ends of the fourth switch module 800 are electrically connected to the USB interface 900 and the charging chip 400, respectively, where the fourth switch module 800 is configured to be in an on state or an off state according to a second control signal output by the main chip 600.

Fig. 9 exemplarily shows a wired charging operation diagram provided by the embodiment of the present application, as shown IN fig. 9, the fourth switch module 800 receives the second control signal output by the host chip 600, the fourth switch module 800 outputs the second control signal according to the received second control signal output by the host chip 600, the fourth switch module 800 is IN a conducting state, the fourth switch module 800 receives the signal VBUS _ USB output by the USB interface 900, and the fourth switch module 800 outputs the signal MB _ USB _ VBUS _ IN to the charging chip 400 according to the received signal VBUS _ USB output by the USB interface 900, where the signal VBUS _ USB and the signal MB _ USB _ VBUS _ IN are power supply signals for transmission. Therefore, the electronic equipment achieves the effect of wired charging.

In one example, the main chip 600 outputs a second control signal to the fourth switch module 800, and after the fourth switch module 800 receives the second control signal output by the main chip 600, the fourth switch module 800 is in a conducting state according to the received second control signal. When the fourth switch module 800 is IN a conducting state, the USB interface 900 outputs a signal VBUS _ USB to the fourth switch module 800, and after the fourth switch module 800 receives the signal VBUS _ USB output by the UAB interface 900, the fourth switch module 800 outputs a signal MB _ USB _ VBUS _ IN to the charging chip 400, so that a charging channel from the UAB interface 900 to the battery 500 is formed, and thus, an effect of performing wired charging on the battery 400 through the USB interface 900 is achieved.

In another example, the fourth switch module 800 does not receive the second control signal output by the main chip 600, and then the fourth switch module 800 is in the off state.

Optionally, the first switch module 200 and the second switch module 300 are electrically connected to the wireless charging and receiving module 100 based on the same PIN. Because the first switch module 200 and the second switch module 300 are electrically connected with the wireless charging receiving module based on the same PIN PIN, the circuit simplification effect of the wireless charging connector is achieved.

It is also added that the battery 500 supplies power to the wireless charging receiving module 100 through the charging chip 400 and the second switch module 300, so that the wireless charging receiving module 100 can upgrade FW, thereby ensuring that the voltage provided by the wireless charging receiving module 100 matches the voltage received by the battery 500 in the wireless charging mode.

The charging chip 400 determines whether the charging requirement is met according to the received power input detection signal output by the first switch 701 and the received current upper limit signal output by the second switch 702, and then controls the state of the first switch module 200. If the charging chip 400 only receives the power input detection signal output by the first switch 701 and does not receive the output current upper limit signal of the second switch 702, the charging chip 400 controls the first switch module 200 to be in the off state. This is because the charging chip 400 only receives the power input detection signal output by the first switch 701, and cannot determine whether the charging requirement is met, so that the first switch module 200 is controlled to be in the off state, thereby playing a role in protecting the electronic device.

To facilitate understanding of the present solution, the electronic device is described below with reference to a specific example. Referring to fig. 1 to 9, when the charging requirement is set in the charging chip 400 to be about 10W, the charging chip 400 confirms the wireless charging mode. In the wireless charging mode, the wireless charging and receiving module 100 provides a voltage of 9V to the battery 500, and in the OTG mode, the battery 500 provides a voltage of 5V to the wireless charging and receiving module 100.

After the first switch 701 and the second switch 702 receive the low-level first control signal output by the main chip 600, the first switch 701 and the second switch 702 are in a conducting state according to the received low-level first control signal. When the first switch 701 and the second switch 702 are in a conducting state, the wireless charging receiving module 100 outputs a 9V voltage signal to the first switch 701, and after the first switch 701 receives the 9V voltage signal output by the wireless charging receiving module 100, the first switch 701 outputs a power input detection signal to the charging chip 400 according to the received 9V voltage signal; the wireless charging receiving module 100 outputs a 9V voltage signal to the first switch module 200, after the first switch module 200 receives the 9V voltage signal output by the wireless charging receiving module 100, the first switch module 200 divides the voltage by a resistor according to the received 9V voltage signal to obtain a 0.96V voltage signal, then the first switch module 200 outputs a 0.96V voltage signal to the second switch 702, after the second switch 702 receives the 0.96V voltage signal output by the first switch module 200, the second switch 702 obtains a 1.2A current signal according to the received 0.96V voltage signal, and the second switch 702 outputs an upper current limit signal to the charging chip 400. The charging chip recognizes that the voltage signal is 9V, the current signal is 1.2A, the power is 10.8W according to the received power input detection signal and the current upper limit signal, and the charging chip 400 confirms that the wireless charging mode is satisfied.

IN the wireless charging mode, the charging chip 400 outputs a high-level signal DC _ IN _ EN to the first switch module 200 through the single port GPIO, and after the first switch module 200 receives the high-level signal DC _ IN _ EN output by the charging chip 400, the first switch module 200 is IN an on state according to the received high-level signal DC _ IN _ EN. Thus, a charging channel from the wireless charging and receiving module 100, the first switch module 200, and the charging chip 400 to the battery 500 is formed. The wireless charging and receiving module 100 inputs a voltage of 9V to the battery 500 through the first switch module 200 and the charging chip 400, so that the wireless charging and receiving module 100 supplies power to the battery 500.

When the main chip 600 outputs the first control signal of high level to the first switch 701 and the second switch 702, and after the first switch 701 and the second switch 702 receive the first control signal of high level output by the main chip 600, the first switch 701 and the second switch 702 are in an off state according to the received first control signal of high level by the first switch 701 and the second switch 702. At this time, the charging chip 400 does not receive the power input detection signal output by the first switch 701 and the current upper limit signal output by the second switch 702, and the charging chip 400 determines that the charging chip is in the OTG mode. The charging chip 400 outputs a low-level signal DC _ IN _ EN to the first switch module 200 through the single port GPIO, and after the first switch module 200 receives the low-level signal DC _ IN _ EN output by the charging chip 400, the first switch module 200 is IN an off state.

In the OTG mode, the main chip 600 outputs a signal WIRELESSA _ FLAG to the second switch module 300, and after the second switch module 300 receives a signal WIRELESSA _ FLAG output by the main chip 600, the second switch module 300 is in a conducting state according to the received signal WIRELESSA _ FLAG by the second switch module 300. Thus, a power supply path from the battery 500, the charging chip 400, the second switch module 300 to the wireless charging and receiving module 100 is formed. The battery 500 inputs a voltage of 5V to the wireless charging and receiving module 100 through the charging chip 400 and the second switch module 300, so that the battery 500 supplies power to the wireless charging and receiving module 100.

In the wired charging mode, the main chip 600 outputs a second control signal to the fourth switch module 800, and after the fourth switch module 800 receives the second control signal output by the main chip 600, the fourth switch module 800 is in a conducting state according to the received second control signal. When the fourth switch module 800 is IN a conducting state, the USB interface 900 outputs a signal VBUS _ USB to the fourth switch module 800, and after the fourth switch module 800 receives the signal VBUS _ USB output by the UAB interface 900, the fourth switch module 800 outputs a signal MB _ USB _ VBUS _ IN to the charging chip 400. Thus, a charging channel from the USB interface 900, the fourth switch module 800, and the charging chip 400 to the battery 500 is formed, and the USB interface 900 inputs a voltage to the battery 500 through the fourth switch module 800 and the charging chip 400, thereby achieving an effect of the USB interface 900 performing wired charging to the battery 500.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims

1. An electronic device having a wireless charging function, comprising: the wireless charging system comprises a wireless charging receiving module, a first switch module, a second switch module, a charging chip, a battery and a main chip;

the wireless charging receiving module is electrically connected with the first end of the first switch module and the first end of the second switch module respectively;

the charging chip is electrically connected with the second end of the first switch module and the second end of the second switch module respectively; the charging chip is also electrically connected with the battery;

the charging chip is used for controlling the first switch module to be in a conducting state when the wireless charging mode is confirmed, so that a charging channel from the wireless charging receiving module to the battery is formed; when the OTG mode is confirmed to be in a data exchange OTG mode, controlling the first switch module to be in a cut-off state;

the main chip is configured to control a working state of the second switch module, and when the main chip is in the data exchange OTG mode, the second switch module is in a conducting state, so that a power supply channel from the battery to the wireless charging and receiving module is formed; when the wireless charging mode is in the wireless charging mode, the second switch module is in a cut-off state.

2. The electronic device of claim 1, further comprising: the third switch module is electrically connected with the charging chip;

the main chip is further used for controlling the third switch module to be conducted when the main chip is in a wireless charging mode;

the third switch module is used for outputting a trigger signal to the charging chip when the charging chip is conducted;

the charging chip is used for confirming that the charging chip is in a wireless charging mode after receiving the trigger signal, and confirming that the charging chip is in the OTG mode when not receiving the trigger signal.

3. The electronic device of claim 2, wherein the third switch module comprises a first switch; two ends of the first switch are respectively and electrically connected with the wireless charging receiving module and the charging chip;

the first switch is used for being in a conducting state or a cut-off state according to a first control signal output by the main chip;

the first switch is also used for outputting a power input detection signal to the charging chip as a trigger signal when the charging chip is conducted.

4. The electronic device of claim 3, wherein the third switch module further comprises a second switch; two ends of the second switch are respectively and electrically connected with the first switch module and the charging chip;

the second switch is used for being in a conducting state or a cut-off state according to the first control signal output by the main chip;

the second switch is also used for outputting a current upper limit signal to the charging chip as a trigger signal when the charging chip is conducted.

5. The electronic device of claim 4, wherein the charging chip is specifically configured to control the first switch module to be in a conducting state when it is determined that the charging requirement is met according to the power input detection signal and the output current upper limit signal.

6. The electronic device of claim 1, further comprising a fourth switch module and a Universal Serial Bus (USB) interface; two ends of the fourth switch module are respectively and electrically connected with the USB interface and the charging chip;

and the fourth switching module is used for being in a conducting state or a cut-off state according to a second control signal output by the main chip.

7. The electronic device of any one of claims 1 to 6, wherein the charging chip has a single general purpose input output port GPIO; the GPIO is used for outputting a control signal indicating on or off to the first switch module.

8. The electronic device of any of claims 1-6, wherein the first switch module and the second switch module are electrically connected to the wireless charging reception module based on a same PIN PIN.