Charging circuit and electronic equipment

Abstract

The present disclosure relates to a charging circuit and an electronic device. The charging circuit includes: an input power supply; a battery; a charging coil; a switching circuit, the switching circuit is coupled to the input power supply and the charging coil; a gating circuit, the gating circuit is coupled between the switching circuit and the battery; wherein, in a first working mode of the charging circuit, the switching circuit converts the DC voltage input by the input power supply, and the gating circuit outputs the converted DC voltage to the battery; in a second working mode of the charging circuit, the switching circuit rectifies the AC voltage received by the charging coil, and the gating circuit outputs the rectified AC voltage to the battery. By multiplexing the switching circuit and the charging coil to realize wired charging and wireless charging of the electronic device, the number of devices in the charging circuit is reduced, thereby reducing the complexity of the charging circuit structure.

Description

Technical Field

[0001] The present disclosure relates to the field of charging technology, and in particular to a charging circuit and an electronic device. Background Art

[0002] At present, with the development of charging technology, electronic devices can support multiple charging methods to meet the needs of different users. However, in order to enable electronic devices to support multiple charging methods, the number of charging circuits in the electronic devices is large, resulting in a complex structure of the charging circuit. Utility Model Content

[0003] In order to overcome the problems existing in the related art, the present disclosure provides a charging circuit and an electronic device.

[0004] According to a first aspect of the present disclosure, a charging circuit is provided, the charging circuit comprising:

[0005] Input power;

[0006] Battery;

[0007] Charging coil;

[0008] a switch circuit, the switch circuit being coupled to both the input power source and the charging coil;

[0009] a gating circuit, the gating circuit being coupled between the switch circuit and the battery;

[0010] Among them, in the first working mode of the charging circuit, the switching circuit converts the DC voltage input by the input power supply, and the gating circuit outputs the converted DC voltage to the battery; in the second working mode of the charging circuit, the switching circuit rectifies the AC voltage received by the charging coil, and the gating circuit outputs the rectified AC voltage to the battery.

[0011] In some embodiments of the present disclosure, the first end of the switch circuit is coupled to the first end of the charging coil, the second end of the switch circuit is coupled to the second end of the charging coil, the third end of the switch circuit is used to couple to the input power supply, and the fourth end of the switch circuit is used to couple to the ground end;

[0012] The first end of the gating circuit is coupled to the third end of the switch circuit, the second end of the gating circuit is coupled to the second end of the charging coil, and the third end of the gating circuit is used to couple to the battery.

[0013] In some embodiments of the present disclosure, the switch circuit includes:

[0014] A first switch unit, wherein a first end of the first switch unit is coupled to a first end of the gating circuit, and a second end of the first switch unit is coupled to a first end of the charging coil;

[0015] a second switch unit, wherein a first end of the second switch unit is coupled to a first end of the first switch unit, and a second end of the second switch unit is coupled to a second end of the charging coil;

[0016] a third switch unit, wherein a first end of the third switch unit is coupled to a second end of the first switch unit, and a second end of the third switch unit is used to couple to the ground end;

[0017] a fourth switch unit, wherein a first end of the fourth switch unit is coupled to a second end of the second switch unit, and a second end of the fourth switch unit is coupled to a second end of the third switch unit;

[0018] Among them, in the first working mode, the first switch unit and the third switch unit switch between the on state and the off state respectively, the second switch unit is in the off state, and the fourth switch unit is in the on state; in the second working mode, the first switch unit, the second switch unit, the third switch unit and the fourth switch unit switch between the on state and the off state respectively.

[0019] In some embodiments of the present disclosure, the gating circuit includes:

[0020] a fifth switch unit, wherein a first end of the fifth switch unit is coupled to a third end of the switch circuit, and a second end of the fifth switch unit is used to couple to the battery;

[0021] a sixth switch unit, wherein a first end of the sixth switch unit is coupled to the second end of the charging coil, and a second end of the sixth switch unit is coupled to the second end of the fifth switch unit;

[0022] Among them, in the first working mode, the fifth switch unit is in the off state, and the sixth switch unit is in the on state; in the second working mode, the fifth switch unit is in the on state, and the sixth switch unit is in the off state.

[0023] In some embodiments of the present disclosure, the charging circuit further includes:

[0024] A first capacitor, wherein a first end of the first capacitor is coupled to the second end of the charging coil and the second end of the gating circuit, and a second end of the first capacitor is coupled to the second end of the switch circuit.

[0025] In some embodiments of the present disclosure, the charging circuit further includes:

[0026] a seventh switch unit, the seventh switch unit being coupled between the input power source and the switch circuit;

[0027] Wherein, in the first working mode, the seventh switch unit is in an on state; in the second working mode, the seventh switch unit is in an off state.

[0028] In some embodiments of the present disclosure, the charging circuit further includes:

[0029] A diode, wherein an anode of the diode is used to be coupled to the input power supply, and a cathode of the diode is coupled to the switch circuit.

[0030] In some embodiments of the present disclosure, the charging circuit further includes:

[0031] A second capacitor, wherein a first end of the second capacitor is coupled to both the switch circuit and the input power supply, and a second end of the second capacitor is used to couple to a ground terminal.

[0032] In some embodiments of the present disclosure, the charging circuit further includes:

[0033] A third capacitor, wherein a first end of the third capacitor is coupled to both the gating circuit and the battery, and a second end of the third capacitor is used to couple to a ground terminal.

[0034] According to a second aspect of the present disclosure, an electronic device is provided, comprising the charging circuit as described above.

[0035] The technical solution provided by the embodiments of the present disclosure may have the following beneficial effects:

[0036] The charging circuit includes an input power supply, a battery, a charging coil, a switching circuit, and a gating circuit. The switching circuit is coupled to the charging coil and coupled to the battery through the gating circuit to rectify the AC voltage received by the charging coil to charge the battery, thereby realizing wireless charging of the electronic device. The switching circuit is coupled to both the input power supply and the charging coil and coupled to the battery through the gating circuit to convert the DC voltage input by the input power supply to charge the battery, thereby realizing wired charging of the electronic device. By multiplexing the switching circuit and the charging coil to realize wired charging and wireless charging of the electronic device, the number of devices in the charging circuit is reduced, thereby reducing the complexity of the charging circuit structure.

[0037] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The accompanying drawings herein are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present utility model, and together with the description, are used to explain the principles of the present utility model.

[0039] Figure 1 is a structural schematic diagram of a charging circuit provided by an exemplary embodiment of the present disclosure;

[0040] Figure 2 is a structural schematic diagram of a charging circuit provided by another exemplary embodiment of the present disclosure;

[0041] Figure 3 is a structural schematic diagram of a charging circuit provided by another exemplary embodiment of the present disclosure;

[0042] Figure 4 is a structural schematic diagram of a charging circuit provided by another exemplary embodiment of the present disclosure;

[0043] Figure 5-1 is a structural schematic diagram of a charging circuit provided by another exemplary embodiment of the present disclosure;

[0044] Figure 5-2 is a structural schematic diagram of a charging circuit provided by another exemplary embodiment of the present disclosure;

[0045] Figure 6 is a structural schematic diagram of a charging circuit provided by another exemplary embodiment of the present disclosure;

[0046] Figure 7 is a system block diagram of an electronic device provided by an exemplary embodiment of the present disclosure.

[0047] In the figure:

[0048] 10-battery; 20-switching circuit; 30-enabling circuit; 400-electronic device; 402-processing component; 404-memory; 406-power component; 408-multimedia component; 410-audio component; 412-input and output interface; 414-sensor component; 416-communication component; 420-processor; L-charging coil; C1-first capacitor; C2-second capacitor; C3-third capacitor; T1-first switch unit; T2-second switch unit; T3-third switch unit; T4-fourth switch unit; T5-fifth switch unit; T6-sixth switch unit; T7-seventh switch unit; D-diode; Vin-input power supply; GND-ground terminal. DETAILED DESCRIPTION

[0049] Here, exemplary embodiments will be described in detail, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the utility model. On the contrary, they are only examples of devices and methods consistent with some aspects of the utility model as detailed in the attached claims. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0050] At present, with the development of charging technology, electronic devices can support multiple charging methods to meet the needs of different users. For example, charging electronic devices through wired charging can improve the charging speed of electronic devices. Charging electronic devices through wireless charging can reduce the complexity of charging electronic devices. Among them, the wireless charging method refers to the process of charging, in which the wireless charging device converts electrical energy into AC energy and transmits it through the transmitting coil, the electronic device couples the AC energy through the receiving coil, and then converts the AC voltage in the AC energy into DC voltage through the rectifier circuit to charge the electronic device. The wired charging method can be divided into a fast charging method and a normal charging method. The fast charging method means that during the charging process, the input voltage provided by the wired charging device to the electronic device is variable, and the wired charging device can dynamically adjust the input voltage according to the battery power to adjust the battery charging voltage to achieve the purpose of increasing the charging speed. The normal charging method means that during the charging process, the input voltage provided by the wired charging device to the electronic device is fixed, and the input voltage is stepped down by the step-down circuit so that the charging voltage meets the charging requirements of the battery.

[0051] In the related art, a charging circuit is provided, and the charging circuit includes a wireless charging circuit and a common charging circuit. The wireless charging circuit includes a switching circuit for rectification and a charging coil. The common charging circuit includes a switching circuit for voltage conversion and an inductor. Therefore, the charging circuit has a problem of complex structure.

[0052] Based on this, the present disclosure provides a charging circuit, which is composed of an input power supply, a battery, a charging coil, a switching circuit and a gating circuit. It can realize both wired charging of electronic devices and wireless charging of electronic devices to reduce the complexity of the charging circuit structure.

[0053] An exemplary embodiment of the present disclosure provides a charging circuit, such as Figure 1As shown, the charging circuit includes an input power supply Vin, a charging coil L, a battery 10, a switch circuit 20 and a gating circuit 30. The switch circuit 20 is coupled to both the input power supply Vin and the charging coil L, and the gating circuit 30 is coupled between the switch circuit 20 and the battery 10. In the first working mode of the charging circuit, the switch circuit 20 converts the DC voltage input by the input power supply Vin, and the gating circuit 30 outputs the converted DC voltage to the battery 10. In the second working mode of the charging circuit, the switch circuit 20 rectifies the AC voltage received by the charging coil L, and the gating circuit 30 outputs the rectified AC voltage to the battery 10.

[0054] In this embodiment, the charging circuit includes an input power supply, a battery, a charging coil, and a switching circuit. The switching circuit is coupled to the charging coil, and is coupled to the battery through a gating circuit to rectify the AC voltage received by the charging coil to charge the battery, thereby realizing wireless charging of the electronic device. The switching circuit is coupled to both the input power supply and the charging coil, and is coupled to the battery through a gating circuit to convert the DC voltage input by the input power supply to charge the battery, thereby realizing wired charging of the electronic device. By multiplexing the switching circuit and the charging coil to realize wired charging and wireless charging of the electronic device, the number of devices in the charging circuit is reduced, thereby reducing the complexity of the charging circuit structure.

[0055] In one embodiment, if Figure 2 As shown, the first end of the switch circuit 20 is coupled to the first end of the charging coil L, the second end of the switch circuit 20 is coupled to the second end of the charging coil L, the third end of the switch circuit 20 is used to couple to the input power supply Vin, and the fourth end of the switch circuit 20 is used to couple to the ground terminal GND. The first end of the gating circuit 30 is coupled to the third end of the switch circuit 20, the second end of the gating circuit 30 is coupled to the second end of the charging coil L, and the third end of the gating circuit 30 is used to couple to the battery 10.

[0056] In this embodiment, the DC voltage is converted and the AC voltage is rectified by the switch circuit, and the switch circuit is reused in the process of wired charging and wireless charging of the electronic device, thereby reducing the complexity of the charging circuit structure. The switch circuit and the battery are coupled by the gating circuit, and the gating circuit can control whether to output the converted DC voltage or the rectified AC voltage to the battery, thereby avoiding short circuit of the switch circuit and improving the reliability of the charging circuit.

[0057] Exemplarily, the negative electrode of the battery 10 is used to be coupled to the ground terminal GND, and the third terminal of the gating circuit 30 is used to be coupled to the positive electrode of the battery 10 .

[0058] In one embodiment, if Figure 3As shown, the switch circuit 20 includes a first switch unit T1, a second switch unit T2, a third switch unit T3 and a fourth switch unit T4. The first end of the first switch unit T1 is coupled to the first end of the gating circuit 30, and the second end of the first switch unit T1 is coupled to the first end of the charging coil L. The first end of the second switch unit T2 is coupled to the first end of the first switch unit T1, and the second end of the second switch unit T2 is coupled to the second end of the charging coil L. The first end of the third switch unit T3 is coupled to the second end of the first switch unit T1, and the second end of the third switch unit T3 is used to couple to the ground terminal GND. The first end of the fourth switch unit T4 is coupled to the second end of the second switch unit T2, and the second end of the fourth switch unit T4 is coupled to the second end of the third switch unit T3. In the first working mode, the first switch unit T1 and the third switch unit T3 are switched between the on state and the off state respectively, the second switch unit T2 is in the off state, and the fourth switch unit T4 is in the on state. In the second working mode, the first switch unit T1 , the second switch unit T2 , the third switch unit T3 and the fourth switch unit T4 are switched between an on state and an off state respectively.

[0059] In this embodiment, during the wireless charging of the electronic device, the AC voltage received by the charging coil can be rectified by turning on and off the first switch unit, the second switch unit, the third switch unit, and the fourth switch unit. During the wired charging of the electronic device, the DC voltage input by the input power supply can be converted by turning on and off the first switch unit and the third switch unit. By reusing the switch circuit during wired charging and wireless charging, the number of switch units in the charging circuit is reduced, thereby reducing the complexity of the charging circuit structure.

[0060] Exemplarily, the first switch unit T1, the second switch unit T2, the third switch unit T3 and the fourth switch unit T4 may be transistors. Wherein, when the first switch unit T1, the second switch unit T2, the third switch unit T3 and the fourth switch unit T4 are N-type field effect transistors, the first end of the first switch unit T1, the first end of the second switch unit T2, the first end of the third switch unit T3 and the first end of the fourth switch unit T4 are drains, and the second end of the first switch unit T1, the second end of the second switch unit T2, the second end of the third switch unit T3 and the second end of the fourth switch unit T4 are sources.

[0061] In one embodiment, the gating circuit 30 includes a fifth switch unit T5 and a sixth switch unit T6. The first end of the fifth switch unit T5 is coupled to the third end of the switch circuit 20, and the second end of the fifth switch unit T5 is used to couple to the battery 10. The first end of the sixth switch unit T6 is coupled to the second end of the charging coil L, and the second end of the sixth switch unit T6 is coupled to the second end of the fifth switch unit T5. In the first working mode, the fifth switch unit T5 is in an off state, and the sixth switch unit T6 is in an on state. In the second working mode, the fifth switch unit T5 is in an on state, and the sixth switch unit T6 is in an off state.

[0062] In this embodiment, by coupling the fifth switch unit between the third end of the switch circuit and the positive electrode of the battery, the fifth switch unit can control whether to charge in a wireless charging manner and stabilize the rectified AC voltage, thereby improving the reliability of the charging circuit. Moreover, after the battery is fully charged, the switch circuit and the battery are disconnected by the fifth switch unit to avoid overcharging of the battery, thereby further improving the reliability of the charging circuit. By coupling the sixth switch unit between the second end of the charging coil and the positive electrode of the battery, the sixth switch unit can control whether to charge in a wired charging manner and stabilize the converted DC voltage, thereby improving the reliability of the charging circuit. Moreover, after the battery is fully charged, the switch circuit and the battery are disconnected by the sixth switch unit to avoid overcharging of the battery, thereby further improving the reliability of the charging circuit.

[0063] Exemplarily, the fifth switch unit T5 and the sixth switch unit T6 may be transistors. Wherein, when the fifth switch unit T5 and the sixth switch unit T6 are N-type field effect transistors, the first end of the fifth switch unit T5 and the first end of the sixth switch unit T6 are drains, and the second end of the fifth switch unit T5 and the second end of the sixth switch unit T6 are sources.

[0064] Exemplarily, the second end of the fifth switch unit T5 is used to be coupled to the positive electrode of the battery 10 .

[0065] In one embodiment, if Figure 4 As shown, the charging circuit further includes a first capacitor C1 . A first end of the first capacitor C1 is coupled to a second end of the charging coil L and a second end of the gating circuit 30 , and a second end of the first capacitor C1 is coupled to a second end of the switch circuit 20 .

[0066] In this embodiment, by coupling the first capacitor with the charging coil and the switch circuit, the resonant frequency of the charging circuit can be adjusted during wireless charging, thereby improving the charging efficiency of the charging circuit. At the same time, during wired charging, when the fourth switch unit of the switch circuit is turned on, the first capacitor can be reused for voltage stabilization and filtering, thereby reducing the complexity of the charging circuit structure.

[0067] In one embodiment, if Figure 5-1 As shown, the charging circuit further includes a seventh switch unit T7. The seventh switch unit T7 is coupled between the input power supply Vin and the switch circuit 20. In the first working mode, the seventh switch unit T7 is in the on state. In the second working mode, the seventh switch unit T7 is in the off state.

[0068] In this embodiment, when the electronic device is not charged or is wirelessly charged, the voltage of the battery may be input to the power supply terminal connected to the input power source, so that the power supply terminal is charged. The battery is isolated from the power supply terminal by the seventh switch unit to prevent the power supply terminal from being charged, thereby improving the reliability of the charging circuit.

[0069] Exemplarily, the seventh switch unit T7 may be a transistor. A first end of the seventh switch unit T7 is used to couple with the input power supply Vin, and a second end of the seventh switch unit is coupled with the switch circuit 20. Wherein, in the case where the seventh switch unit T7 is an N-type field effect transistor, the first end of the seventh switch unit T7 may be a source, and the second end of the seventh switch unit T7 may be a drain.

[0070] Exemplarily, the seventh switch unit T7 is coupled between the input power supply Vin and the gating circuit 30, the first end of the seventh switch unit T7 is used to be coupled to the input power supply Vin, and the second end of the seventh switch unit is coupled to the gating circuit 30. Wherein, in the case where the seventh switch unit T7 is an N-type field effect transistor, the first end of the seventh switch unit T7 may be a source, and the second end of the seventh switch unit T7 may be a drain.

[0071] In one embodiment, if Figure 5-2 As shown, the charging circuit further includes a diode D. An anode of the diode D is used to be coupled to the input power source Vin, and a cathode of the diode D is coupled to the switch circuit 20 .

[0072] In this embodiment, by coupling a diode between the input power source and the switch circuit, the battery voltage can be prevented from flowing back when the input power source is not charging the battery, thereby improving the reliability of the charging circuit.

[0073] Exemplarily, the diode D may be a body diode of the seventh switch unit T7 or may be a separate diode.

[0074] In one embodiment, if Figure 6 As shown, the charging circuit further includes a second capacitor C2. A first end of the second capacitor C2 is coupled to the switch circuit 20 and the input power source Vin, and a second end of the second capacitor C2 is coupled to the ground terminal GND.

[0075] In this embodiment, since the DC voltage of the input power source may fluctuate and affect the charging of the battery, the second capacitor can play a role of voltage stabilization and filtering, thereby improving the reliability of the charging circuit.

[0076] Exemplarily, a first end of the second capacitor C2 is coupled to both the gating circuit 30 and the input power supply Vin, and a second end of the second capacitor C2 is coupled to the ground terminal GND.

[0077] In one embodiment, the charging circuit further includes a third capacitor C3. A first end of the third capacitor C3 is coupled to both the gating circuit 30 and the battery 10, and a second end of the third capacitor C3 is coupled to the ground terminal GND.

[0078] In this embodiment, by coupling the third capacitor in parallel with the battery, the third capacitor can play a role of voltage stabilization and filtering during the process of charging the battery, thereby improving the reliability of the charging circuit.

[0079] Exemplarily, a first end of the third capacitor C3 is used to be coupled to the positive electrode of the battery 10 .

[0080] In one embodiment, the charging circuit further includes a control circuit, which is coupled to both the switch circuit 20 and the gate circuit 30 .

[0081] In this embodiment, the control circuit controls the switch circuit and the gating circuit, so that the charging mode of the electronic device can be changed to correspond to the type of the charging device, thereby improving the reliability of the charging circuit. In addition, the control circuit can also control the on and off of the switch circuit and the gating circuit to prevent the charging circuit from overcharging the battery and causing damage to the battery, thereby further improving the reliability of the charging circuit.

[0082] For example, when the charging circuit includes a first switch unit T1, a second switch unit T2, a third switch unit T3, a fourth switch unit T4, a fifth switch unit T5, a sixth switch unit T6, and a seventh switch unit T7, a plurality of control terminals of the control circuit may be coupled to the control terminal of the first switch unit T1, the control terminal of the second switch unit T2, the control terminal of the third switch unit T3, the control terminal of the fourth switch unit T4, the control terminal of the fifth switch unit T5, the control terminal of the sixth switch unit T6, and the control terminal of the seventh switch unit T7, respectively. As the number of switch units in the switch circuit is reduced, the number of control terminals occupied by the control circuit is reduced, thereby reducing the complexity of the charging circuit structure.

[0083] An exemplary embodiment of the present disclosure provides a charging circuit, which includes a charging coil L, a first switch unit T1, a second switch unit T2, a third switch unit T3, a fourth switch unit T4, a fifth switch unit T5, a sixth switch unit T6, a seventh switch unit T7, a first capacitor C1, a second capacitor C2, a third capacitor C3 and a diode D. The first end of the first switch unit T1 is coupled to the first end of the second switch unit T2, the first end of the second capacitor C2, the first end of the fifth switch unit T5 and the second end of the seventh switch unit T7, and the second end of the first switch unit T1 is coupled to the first end of the charging coil L and the first end of the third switch unit T3. The second end of the second switch unit T2 is coupled to the first end of the fourth switch unit T4 and the second end of the first capacitor C1. The second end of the third switch unit T3 is coupled to the second end of the fourth switch unit T4, the second end of the second capacitor C2, the second end of the third capacitor C3, the negative electrode of the battery 10 and the ground terminal GND. The second end of the fifth switch unit T5 is coupled to the first end of the third capacitor C3, the second end of the sixth switch unit T6, and the positive electrode of the battery 10. The first end of the sixth switch unit T6 is coupled to the second end of the charging coil L and the first end of the first capacitor C1. The first end of the seventh switch unit T7 is used to couple with the input power supply Vin. The anode of the diode D is coupled to the first end of the seventh switch unit T7, and the cathode of the diode D is coupled to the second end of the seventh switch unit T7.

[0084] By way of example, the working principle of the charging circuit is described as follows:

[0085] When the electronic device charges the battery 10 in a wired charging mode, the first switch unit T1 and the third switch unit T3 in the charging circuit are switched on alternately, the fourth switch unit T4, the sixth switch unit T6 and the seventh switch unit T7 are switched on, and the second switch unit T2 and the fifth switch unit T5 are switched off. When the charging circuit operates in the first state, the first switch unit T1 is switched on and the third switch unit T3 is switched off, and the current in the charging circuit flows to: input power Vin, the seventh switch unit T7, the first switch unit T1, the charging coil L, the sixth switch unit T6, the positive electrode of the battery 10, the negative electrode of the battery 10, and the ground terminal GND. When the charging circuit operates in the second state, the first switch unit T1 is switched off and the third switch unit T3 is switched on, and the current in the charging circuit flows to: the second end of the charging coil L, the sixth switch unit T6, the positive electrode of the battery 10, the negative electrode of the battery 10, the third switch unit T3, and the first end of the charging coil L.

[0086] When the electronic device charges the battery 10 in a wireless charging manner, the first switch unit T1 and the fourth switch unit T4 in the charging circuit are turned on at the same time, the second switch unit T2 and the third switch unit T3 are turned on at the same time, and the first switch unit T1 and the fourth switch unit T4 are turned on alternately with the second switch unit T2 and the third switch unit T3, the fifth switch unit T5 is turned on, and the sixth switch unit T6 and the seventh switch unit T7 are turned off. When the voltage at the first end of the charging coil L is positive and the voltage at the second end is negative, the first switch unit T1 and the fourth switch unit T4 are turned on, and the current in the charging circuit flows as follows: the first end of the charging coil L, the first switch unit T1, the fifth switch unit T5, the positive electrode of the battery 10, the negative electrode of the battery 10, the fourth switch unit T4, the first capacitor C1, and the second end of the charging coil L. When the voltage at the first end of the charging coil L is negative and the voltage at the second end is positive, the second switch unit T2 and the third switch unit T3 are turned on, and the current in the charging circuit flows to: the second end of the charging coil L, the first capacitor C1, the second switch unit T2, the fifth switch unit T5, the positive electrode of the battery 10, the negative electrode of the battery 10, the third switch unit T3, and the first end of the charging coil L.

[0087] In an exemplary embodiment, an electronic device is provided, and the electronic device is, for example, a mobile phone, a laptop computer, a tablet computer, a wearable device, etc. The electronic device includes the charging circuit as described above.

[0088] refer to Figure 7 As shown, electronic device 400 may include one or more of the following components: a processing component 402 , a memory 404 , a power component 406 , a multimedia component 408 , an audio component 410 , an input / output (I / O) interface 412 , a sensor component 414 , and a communication component 416 .

[0089] The processing component 402 generally controls the overall operation of the electronic device 400, such as operations associated with display, phone calls, data communications, camera operations, and recording operations. The processing component 402 may include one or more processors 420 to execute instructions to complete all or part of the steps of the above-mentioned method. In addition, the processing component 402 may include one or more modules to facilitate the interaction between the processing component 402 and other components. For example, the processing component 402 may include a multimedia module to facilitate the interaction between the multimedia component 408 and the processing component 402.

[0090] The memory 404 is configured to store various types of data to support operations on the electronic device 400. Examples of such data include instructions for any application or method operating on the electronic device 400, contact data, phone book data, messages, pictures, videos, etc. The memory 404 can be implemented by any type of volatile or non-volatile storage terminal or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk.

[0091] The power supply component 406 provides power to the various components of the electronic device 400. The power supply component 406 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to the electronic device 400.

[0092] The multimedia component 408 includes a screen that provides an output interface between the electronic device 400 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundaries of the touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 408 includes a front camera module and / or a rear camera module. When the electronic device 400 is in an operating mode, such as a shooting mode or a video mode, the front camera module and / or the rear camera module may receive external multimedia data. Each front camera module and the rear camera module may be a fixed optical lens system or have a focal length and optical zoom capability.

[0093] The audio component 410 is configured to output and / or input audio signals. For example, the audio component 410 includes a microphone (MIC), and when the electronic device 400 is in an operating mode, such as a call mode, a recording mode, and a voice recognition mode, the microphone is configured to receive an external audio signal. The received audio signal can be further stored in the memory 404 or sent via the communication component 416. In some embodiments, the audio component 410 also includes a speaker for outputting audio signals.

[0094] I / O interface 412 provides an interface between processing component 402 and peripheral interface modules, such as keyboards, click wheels, buttons, etc. These buttons may include but are not limited to: a home button, a volume button, a start button, and a lock button.

[0095] The sensor assembly 414 includes one or more sensors for providing various aspects of status assessment for the electronic device 400. For example, the sensor assembly 414 can detect the open / closed state of the electronic device 400, the relative positioning of components, such as the display and keypad of the electronic device 400, and the sensor assembly 414 can also detect the position change of the electronic device 400 or a component of the electronic device 400, the presence or absence of user contact with the electronic device 400, the orientation or acceleration / deceleration of the electronic device 400, and the temperature change of the electronic device 400. The sensor assembly 414 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor assembly 414 may also include an optical sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 414 may also include an accelerometer, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

[0096] The communication component 416 is configured to facilitate wired or wireless communication between the electronic device 400 and other terminals. The electronic device 400 can access a wireless network based on a communication standard, such as WiFi, 2G, 3G, 4G, 5G, or a combination thereof. In an exemplary embodiment, the communication component 416 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 416 also includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology and other technologies.

[0097] In an exemplary embodiment, the electronic device 400 may be implemented by one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing terminals (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components.

[0098] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0099] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present disclosure, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0100] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the utility model disclosed herein. The present disclosure is intended to cover any variations, uses or adaptations of the present disclosure, which follow the general principles of the present disclosure and include common knowledge or customary technical means in the art that are not disclosed in the present disclosure. The specification and examples are to be regarded as exemplary only, and the true scope and spirit of the present disclosure are indicated by the claims.

[0101] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A charging circuit, characterized in that: The charging circuit comprises: Input power; Battery; Charging coil; a switch circuit, the switch circuit being coupled to both the input power source and the charging coil; a gating circuit, the gating circuit being coupled between the switch circuit and the battery; Among them, in the first working mode of the charging circuit, the switching circuit converts the DC voltage input by the input power supply, and the gating circuit outputs the converted DC voltage to the battery; in the second working mode of the charging circuit, the switching circuit rectifies the AC voltage received by the charging coil, and the gating circuit outputs the rectified AC voltage to the battery.

2. The charging circuit according to claim 1, characterized in that: The first end of the switch circuit is coupled to the first end of the charging coil, the second end of the switch circuit is coupled to the second end of the charging coil, the third end of the switch circuit is used to couple to the input power supply, and the fourth end of the switch circuit is used to couple to the ground end; The first end of the gating circuit is coupled to the third end of the switch circuit, the second end of the gating circuit is coupled to the second end of the charging coil, and the third end of the gating circuit is used to couple to the battery.

3. The charging circuit according to claim 2, characterized in that: The switch circuit comprises: A first switch unit, wherein a first end of the first switch unit is coupled to a first end of the gating circuit, and a second end of the first switch unit is coupled to a first end of the charging coil; a second switch unit, wherein a first end of the second switch unit is coupled to a first end of the first switch unit, and a second end of the second switch unit is coupled to a second end of the charging coil; a third switch unit, wherein a first end of the third switch unit is coupled to a second end of the first switch unit, and a second end of the third switch unit is used to couple to the ground end; a fourth switch unit, wherein a first end of the fourth switch unit is coupled to a second end of the second switch unit, and a second end of the fourth switch unit is coupled to a second end of the third switch unit; Among them, in the first working mode, the first switch unit and the third switch unit switch between the on state and the off state respectively, the second switch unit is in the off state, and the fourth switch unit is in the on state; in the second working mode, the first switch unit, the second switch unit, the third switch unit and the fourth switch unit switch between the on state and the off state respectively.

4. The charging circuit according to claim 2, characterized in that: The gating circuit comprises: a fifth switch unit, wherein a first end of the fifth switch unit is coupled to a third end of the switch circuit, and a second end of the fifth switch unit is used to couple to the battery; a sixth switch unit, wherein a first end of the sixth switch unit is coupled to the second end of the charging coil, and a second end of the sixth switch unit is coupled to the second end of the fifth switch unit; Among them, in the first working mode, the fifth switch unit is in the off state, and the sixth switch unit is in the on state; in the second working mode, the fifth switch unit is in the on state, and the sixth switch unit is in the off state.

5. The charging circuit according to claim 2, characterized in that: The charging circuit further comprises: A first capacitor, wherein a first end of the first capacitor is coupled to the second end of the charging coil and the second end of the gating circuit, and a second end of the first capacitor is coupled to the second end of the switch circuit.

6. The charging circuit according to claim 1, characterized in that: The charging circuit further comprises: a seventh switch unit, the seventh switch unit being coupled between the input power source and the switch circuit; Wherein, in the first working mode, the seventh switch unit is in an on state; in the second working mode, the seventh switch unit is in an off state.

7. The charging circuit according to claim 6, characterized in that: The charging circuit further comprises: A diode, wherein an anode of the diode is used to be coupled to the input power supply, and a cathode of the diode is coupled to the switch circuit.

8. The charging circuit according to any one of claims 1 to 7, characterized in that: The charging circuit further comprises: A second capacitor, wherein a first end of the second capacitor is coupled to both the switch circuit and the input power supply, and a second end of the second capacitor is used to couple to a ground terminal.

9. The charging circuit according to any one of claims 1 to 7, characterized in that: The charging circuit further comprises: A third capacitor, wherein a first end of the third capacitor is coupled to both the gating circuit and the battery, and a second end of the third capacitor is used to couple to a ground terminal.

10. An electronic device, characterized in that: The electronic device comprises the charging circuit according to any one of claims 1 to 9.

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