Charging circuit, charging chip and electronic equipment

Abstract

The utility model relates to a charging circuit, a charging chip and electronic equipment, the charging circuit comprises a current input end, a first charging circuit, a second charging circuit and a first inductor, and the first charging circuit comprises a first output end; the second charging circuit comprises a second output end; the first charging circuit and the second charging circuit are connected in parallel to the current input end, and the first output end and the second output end are respectively connected with the first inductor. The first charging circuit and the second charging circuit which are connected in parallel are arranged in the charging circuit, the first charging circuit and the second charging circuit can alternately output large current, then the large current is continuously output, and the charging speed is increased; the first inductor has the characteristic of resisting current change when the current changes, so that the current and voltage output by the first charging circuit and the second charging circuit are more stable, and the charging speed is further improved.

Description

Technical Field

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

[0002] As the functions of electronic devices (such as mobile phones) become increasingly powerful, their power consumption is also gradually increasing, and their requirements for battery capacity and power are also gradually increasing, which in turn puts higher requirements on the charging performance of electronic devices. The core component of electronic device charging is the charging chip, which is responsible for converting the input power into a voltage and current suitable for battery charging, and realizing the control and protection of the charging process. The charging circuit of the charging chip directly affects the charging efficiency and charging stability. Utility Model Content

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

[0004] According to a first aspect of an embodiment of the present disclosure, a charging circuit is provided, comprising a current input terminal, a first charging circuit, a second charging circuit, and a first inductor. The first charging circuit comprises a first output terminal; the second charging circuit comprises a second output terminal. The first charging circuit and the second charging circuit are connected in parallel to the current input terminal, and the first output terminal and the second output terminal are respectively connected to the first inductor.

[0005] In some embodiments, the first charging circuit includes a first switch circuit and a first capacitor connected in series between the current input terminal and the first output terminal; one end of the first capacitor is connected to the first output terminal, and the other end is connected to the first output terminal through a third switch circuit; and / or, the second charging circuit includes a second switch circuit and a second capacitor connected in series between the current input terminal and the second output terminal; one end of the second capacitor is connected to the second output terminal, and the other end is connected to the second output terminal through a fourth switch circuit.

[0006] In some embodiments, the first output terminal is grounded through a sixth switch circuit, and the second output terminal is grounded through a fifth switch circuit.

[0007] In some embodiments, the charging circuit further includes a second inductor, one end of the second inductor is connected to the first output end, the other end of the second inductor is connected to the second output end, and a portion between the two ends of the second inductor is connected to the first inductor.

[0008] In some embodiments, the inductive reactance of the second inductor distributed on both sides of the connection point between the first inductor and the second inductor is the same.

[0009] In some embodiments, the inductive reactance of the first inductor is half the inductive reactance of the second inductor.

[0010] In some embodiments, the first switch circuit includes a first MOS transistor, the second switch circuit includes a second MOS transistor, the third switch circuit includes a third MOS transistor, the fourth switch circuit includes a fourth MOS transistor, the fifth switch circuit includes a fifth MOS transistor, and the sixth switch circuit includes a sixth MOS transistor.

[0011] In some embodiments, the first MOS transistor, the second MOS transistor, the third MOS transistor, the fourth MOS transistor, the fifth MOS transistor, and the sixth MOS transistor are all N-channel MOS transistors.

[0012] According to a second aspect of an embodiment of the present disclosure, a charging chip is provided, comprising the charging circuit of the present disclosure.

[0013] According to a third aspect of an embodiment of the present disclosure, an electronic device is provided, comprising the charging chip of the present disclosure.

[0014] The technical solution provided by the embodiments of the present disclosure may include the following beneficial effects: by setting a first inductor connected in series with the first charging circuit and the second charging circuit at the same time, utilizing the characteristic of the inductor resisting current changes, when the first charging circuit and the second charging circuit output a large current after voltage reduction, it plays a role in stabilizing the current, thereby improving the stability of the charging current and improving the charging efficiency.

[0015] 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

[0016] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0017] Figure 1 is a circuit diagram of a charging circuit according to an exemplary embodiment.

[0018] Figure 2 FIG. 1 is a circuit diagram of a charging circuit according to an exemplary embodiment.

[0019] Figure 3 is a circuit diagram of a charging circuit according to an exemplary embodiment.

[0020] Figure 4 The figure is a circuit status diagram of a charging circuit according to an exemplary embodiment.

[0021] Figure 5The figure is a circuit status diagram of a charging circuit according to an exemplary embodiment.

[0022] Figure 6 The figure is a circuit status diagram of a charging circuit according to an exemplary embodiment.

[0023] Figure 7 The figure is a circuit status diagram of a charging circuit according to an exemplary embodiment.

[0024] Figure 8 The figure is a circuit status diagram of a charging circuit according to an exemplary embodiment. DETAILED DESCRIPTION

[0025] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0026] In an embodiment of the present disclosure, the charging circuit includes a current input terminal, a first charging circuit, a second charging circuit and a first inductor, the first charging circuit includes a first output terminal; the second charging circuit includes a second output terminal; the first charging circuit and the second charging circuit are connected in parallel to the current input terminal, and the first output terminal and the second output terminal are respectively connected to the first inductor.

[0027] A first charging circuit and a second charging circuit connected in parallel are arranged in the charging circuit. During charging, the first charging circuit and the second charging circuit can output a large current alternately, and then continuously output a large current, thereby increasing the charging speed.

[0028] In an embodiment of the present disclosure, a first inductor is provided which is connected in series with the first charging circuit and the second charging circuit. The first inductor has the characteristic of resisting current changes when the current changes, so that the current and voltage output by the first charging circuit and the second charging circuit are more stable, thereby improving the charging speed.

[0029] In the embodiments of the present disclosure, the charging circuit is defined as a circuit connection method rather than a specific implementation form of the connection method. Those skilled in the art may implement the charging circuit in the present disclosure in a variety of forms.

[0030] Figure 1 is a circuit diagram of a charging circuit according to an exemplary embodiment. Figure 1As shown, the charging circuit includes a current input terminal Vin, a first charging circuit, a second charging circuit and a first inductor L1. The first charging circuit includes a first output terminal V1; the second charging circuit includes a second output terminal V2; the first charging circuit and the second charging circuit are connected in parallel to the current input terminal Vin, and the first output terminal V1 and the second output terminal V2 are respectively connected to the first inductor L1.

[0031] In the embodiment of the present disclosure, by providing a first inductor L1 connected in series with both the first charging circuit and the second charging circuit, the characteristic of the inductor resisting current changes is utilized to stabilize the current when the first charging circuit and the second charging circuit output a large current after voltage reduction.

[0032] In some embodiments, the current is output from the current input terminal Vin through the first charging circuit and the second charging circuit connected in parallel, and then through the first inductor L1 and the charging output terminal Vout to charge the battery.

[0033] Figure 2 is a circuit diagram of a charging circuit according to an exemplary embodiment of 1, such as Figure 2 As shown, in some embodiments, the first charging circuit includes a first switch circuit Q1 and a first capacitor C1 which are connected in series between the current input terminal Vin and the first output terminal V1; one end of the first capacitor C1 is connected to the first output terminal V1, and the other end is connected to the first output terminal V1 through a third switch circuit Q3.

[0034] like Figure 2 As shown, in some embodiments, the second charging circuit includes a second switch circuit Q2 and a second capacitor C2 connected in series between the current input terminal Vin and the second output terminal V2; one end of the second capacitor C2 is connected to the second output terminal V2, and the other end is connected to the second output terminal V2 through a fourth switch circuit Q4.

[0035] Among them, the scheme of setting the first charging circuit with the first switch circuit Q1 and the first capacitor C1 and the scheme of setting the second charging circuit with the second switch circuit Q2 and the second capacitor C2 can be adopted at the same time or one of them can be adopted selectively, and technicians in this field can flexibly choose according to needs.

[0036] In the embodiment of the present disclosure, a charging circuit is formed from the current input terminal Vin through the first switch circuit Q1, the first capacitor C1, and the first inductor L1; another charging circuit is formed from the current input terminal Vin through the second switch circuit Q2, the second capacitor C2, and the second inductor L2.

[0037] In the embodiment of the present disclosure, a discharge circuit is formed from the first capacitor C1 through the third switch circuit Q3 and the first inductor L1; and a discharge circuit is formed from the second capacitor C2 through the fourth switch circuit Q4 and the first inductor L1.

[0038] In some embodiments, Figure 2 As shown, the first output terminal V1 is grounded through the sixth switch circuit Q6, and the second output terminal V2 is grounded through the fifth switch circuit Q5.

[0039] In an embodiment of the present disclosure, when the first switch circuit Q1 is turned on, the second switch circuit Q2 is turned off, the third switch circuit Q3 is turned off, the fourth switch circuit Q4 is turned on, the fifth switch circuit Q5 is turned on, and the sixth switch circuit Q6 is turned off, the first capacitor C1 is in a charging state, the second capacitor C2 is disconnected from the current input terminal Vin, and the second capacitor C2 temporarily acts as a power source to release the electric energy stored in the second capacitor C2 in the previous cycle and releases current to the outside. When the electric charge of the second capacitor C2 gradually decreases with the release time, the first inductor L1 releases current to maintain the stability of the output current.

[0040] When the first switch circuit Q1 is turned off, the second switch circuit Q2 is turned on, the third switch circuit Q3 is turned on, the fourth switch circuit Q4 is turned off, the fifth switch circuit Q5 is turned off, and the sixth switch circuit Q6 is turned on, the second capacitor C2 is in a charging state, the first capacitor C1 is disconnected from the current input terminal Vin, and the first capacitor C1 temporarily acts as a power source to release the electric energy stored in the first capacitor C1 in the previous cycle and release current to the outside. When the electric charge of the first capacitor C1 gradually decreases with the release time, the first inductor L1 releases current to maintain the stability of the output current.

[0041] In some embodiments, the fifth switch circuit Q5 is grounded through the second ground G2 , and the sixth switch circuit Q6 is grounded through the first ground G1 .

[0042] In some embodiments, the charging circuit of the embodiment of the present disclosure can be implemented in a variety of ways, which is not limited by the present disclosure. Accordingly, various components in the embodiment of the present disclosure can also have a variety of implementations. For example, the first capacitor C1 and the second capacitor C2 in the embodiment can be set as flying capacitors or other forms, and those skilled in the art can choose by themselves.

[0043] In some embodiments, the charging circuit may further include a third capacitor C3, one end of the third capacitor C3 is connected to the first inductor L1, and the other end is grounded. When the first capacitor C1 and the second capacitor C2 are charged, the third capacitor C3 will also be charged. When the first capacitor C1 and the second capacitor C2 are switched between the charging state and the discharging state, there is also a state in which the first switch circuit Q1, the second switch circuit Q2, the third switch circuit Q3, the fourth switch circuit Q4, the fifth switch circuit Q5, and the sixth switch circuit Q6 are all turned off. At this time, the electricity in the first capacitor C1 and the second capacitor C2 has been released and is not charged, and the third capacitor C3 releases the electricity stored in the previous cycle to maintain the continuity of the output current.

[0044] When charging using the charging circuit disclosed in the present invention, the number of capacitors and switch circuits in the circuit is relatively small, which can effectively reduce the loss of current in the circuit and improve the charging efficiency.

[0045] In some embodiments, the third capacitor C3 is grounded via the third ground G3.

[0046] Figure 3 is a circuit diagram of a charging circuit according to an exemplary embodiment. Figure 3 As shown, the charging circuit further includes a second inductor L2, one end of the second inductor L2 is connected to the first output terminal V1, the other end is connected to the second output terminal V2, and the portion between the two ends of the second inductor L2 is connected to the first inductor L1.

[0047] In the embodiments of the present disclosure, by providing a second inductor L2 connected in parallel in the first charging circuit and the second charging circuit, the output voltage can be adjusted. For example, by changing the connection point of the first inductor L1 on the second inductor L2, the inductive reactance of the second inductor L2 on both sides of the connection point between the first inductor L1 and the second inductor L2 can be changed, thereby changing the output voltage and current of the charging output terminal Vout.

[0048] In some embodiments, the second inductor L2 has the same inductance distributed on both sides of the connection point between the first inductor L1 and the second inductor L2.

[0049] In the embodiment of the present disclosure, the inductive reactances on both sides of the connection point between the first inductor L1 and the second inductor L2 are the same, which ensures that the current and voltage output by the first charging circuit and the second charging circuit are the same, thereby ensuring the stability of the output current of the entire charging circuit.

[0050] In some embodiments, the inductive reactance of the first inductor L1 is half of the inductive reactance of the second inductor L2 .

[0051] In the embodiment of the present disclosure, when the first switch circuit Q1 is turned on, the second switch circuit Q2 is turned off, the third switch circuit Q3 is turned off, the fourth switch circuit Q4 is turned on, the fifth switch circuit Q5 is turned on, and the sixth switch circuit Q6 is turned off, the first capacitor C1 is in a charging state, and the voltage at the first capacitor C1 is half of the voltage at the current input terminal Vin; when the first switch circuit Q1 is turned off, the second switch circuit Q2 is turned on, the third switch circuit Q3 is turned on, the fourth switch circuit Q4 is turned off, the fifth switch circuit Q5 is turned off, and the sixth switch circuit Q6 is turned on, the first capacitor C1 is in a discharging state, and its discharge voltage is half of the voltage at the current input terminal Vin. The inductive reactance of the first inductor L1 is half of the inductive reactance of the second inductor L2, that is, the inductive reactance of the second inductor L2 connected to the discharge circuit of the first capacitor C1 is half of the second inductor L2, and the inductance of the second inductor L2 connected to the discharge circuit of the first capacitor C1 is the same as the inductive reactance of the first circuit, so the voltage output by the charging output terminal Vout is one quarter of the voltage of the current input terminal Vin.

[0052] Figure 4 is a circuit state diagram of a charging circuit according to an exemplary embodiment. Figure 5 is a circuit state diagram of a charging circuit according to an exemplary embodiment. Figure 6 is a circuit state diagram of a charging circuit according to an exemplary embodiment. Figure 4 As shown, the first switch circuit Q1 is turned on, the second switch circuit Q2 is turned off, the third switch circuit Q3 is turned off, the fourth switch circuit Q4 is turned on, the fifth switch circuit Q5 is turned on, and the sixth switch circuit Q6 is turned off. The first capacitor C1 is connected to the current input terminal Vin, and the first capacitor C1 is in a charging state. At this time, the voltage of the first capacitor C1 is 1 / 2Vin. The second capacitor C2 is disconnected from the current input terminal Vin and is in a discharging state, releasing the amount of electricity charged in the previous cycle. Its discharge voltage is 1 / 2Vin, and the voltage output by the charging output terminal Vout is 1 / 4Vin. At this time, Figure 4 The charging circuit of the first capacitor C1 is shown as N1: the current input terminal Vin, the first switch circuit Q1, the first capacitor C1, the second inductor L2, and the first inductor L1 constitute the charging circuit; the discharging circuit of the second capacitor C2 is shown as N2: the current flows from the second capacitor C2 through the second switch circuit Q4, the second inductor L2, and the first inductor L1 to the charging output terminal Vout. Figure 4 N1 represents the direction of the circuit being charged, but does not represent the actual current flowing, and N2 represents the direction of the current output when the second capacitor C2 is discharged.

[0053] like Figure 5As shown, the first switch circuit Q1, the second switch circuit Q2, the third switch circuit Q3, the fourth switch circuit Q4, the fifth switch circuit Q5, and the sixth switch circuit Q6 are all turned off. At this time, the first capacitor C1 is charged, the second capacitor C2 is discharged, and the third capacitor C3 starts to discharge, avoiding interruption of the current output by the charging output terminal Vout. Figure 5 N3 represents the current direction when the third capacitor C3 is discharged.

[0054] In some embodiments, the process in which the first switch circuit Q1, the second switch circuit Q2, the third switch circuit Q3, the fourth switch circuit Q4, the fifth switch circuit Q5, and the sixth switch circuit Q6 are all turned off and discharged by the third capacitor C3 is extremely short, so it may be omitted in some descriptions.

[0055] like Figure 6 As shown, the first switch circuit Q1 is turned off, the second switch circuit Q2 is turned on, the third switch circuit Q3 is turned on, the fourth switch circuit Q4 is turned off, the fifth switch circuit Q5 is turned off, and the sixth switch circuit Q6 is turned on. The second capacitor C2 is connected to the current input terminal Vin, and the second capacitor C2 is in a charging state. At this time, the voltage of the second capacitor C2 is 1 / 2Vin. The first capacitor C1 is disconnected from the current input terminal Vin and is in a discharging state, releasing the amount of electricity charged in the previous cycle. Its discharge voltage is 1 / 2Vin, and the voltage output by the charging output terminal Vout is 1 / 4Vin. At this time, Figure 6 The charging circuit of the second capacitor C2 is shown as N4: the current input terminal Vin, the second switch circuit Q2, the second capacitor C2, the second inductor L2, and the first inductor L1 constitute the charging circuit; the discharging circuit of the first capacitor C1 is shown as N5: the current flows from the first capacitor C1 through the third switch circuit Q3, the second inductor L2, and the first inductor L1 to the charging output terminal Vout. Figure 6 N4 represents the direction of the circuit being charged, but does not represent the actual current flowing, and N5 represents the direction of the current output when the first capacitor C1 is discharged.

[0056] In some embodiments, Figure 4 , Figure 5 , Figure 6 The three circuit states are as follows Figure 4 —— Figure 5 —— Figure 6 —— Figure 5 —— Figure 4The output of 1:4 is stably achieved, that is, the voltage input at the current input terminal Vin is reduced to one-fourth of Vin, the current is increased to four times of Vin, and the current is output from the charging output terminal Vout to charge the battery.

[0057] Figure 7 is a circuit state diagram of a charging circuit according to an exemplary embodiment. Figure 8 is a circuit state diagram of a charging circuit according to an exemplary embodiment. Figure 7 As shown, the first switch circuit Q1 is turned on, the second switch circuit Q2 is turned on, the third switch circuit Q3 is turned off, the fourth switch circuit Q4 is turned off, the fifth switch circuit Q5 is turned off, and the sixth switch circuit Q6 is turned off. The first capacitor C1 and the second capacitor C2 are both connected to the current input terminal Vin and are in a charging state. At this time, Figure 7 The charging circuit of the first capacitor C1 is shown as N7: the current input terminal Vin, the first switch circuit Q1, the first capacitor C1, the second inductor L2, and the first inductor L1 constitute a charging circuit; the charging circuit of the second capacitor C2 is shown as N6: the current input terminal Vin, the second switch circuit Q2, the second capacitor C2, the second inductor L2, and the first inductor L1 constitute another charging circuit. Figure 7 N6 and N7 represent the direction of the charging circuit, but do not represent the actual current flow.

[0058] In some embodiments, when the first capacitor C1 and the second capacitor C2 are charged, the third capacitor C3 is discharged to maintain the stability of the output current.

[0059] like Figure 8 As shown, the first switch circuit Q1 is turned off, the second switch circuit Q2 is turned off, the third switch circuit Q3 is turned on, the fourth switch circuit Q4 is turned on, the fifth switch circuit Q5 is turned off, and the sixth switch circuit Q6 is turned off. The first capacitor C1 and the second capacitor C2 are both disconnected from the current input terminal Vin and are in a discharge state. At this time, Figure 8 The discharge circuit of the first capacitor C1 is shown as N9: the current flows from the first capacitor C1 through the third switch circuit Q3, the second inductor L2, and the first inductor L1 to the charging output terminal Vout; the discharge circuit of the second capacitor C2 is shown as N8: the current flows from the second capacitor C2 through the second switch circuit Q4, the second inductor L2, and the first inductor L1 to the charging output terminal Vout. Figure 8 Among them, N8 and N9 represent the direction of the current when the first capacitor C1 and the second capacitor C2 are discharged.

[0060] In some embodiments, Figure 7 , Figure 8 The two circuit states in the circuit alternately cycle, that is, they cycle in the order of "charging the first capacitor C1 and the second capacitor C2" - "discharging the first capacitor C1 and the second capacitor C2" - "charging the first capacitor C1 and the second capacitor C2", and stably achieve a 1:2 output, that is, the voltage input at the current input terminal Vin is reduced to half of Vin, and the current is increased to twice of Vin, and is output from the charging output terminal Vout to charge the battery.

[0061] In some embodiments, the charging circuit includes a control module, and the control module is used to control the on and off of the first switch circuit Q1, the second switch circuit Q2, the third switch circuit Q3, the fourth switch circuit Q4, the fifth switch circuit Q5, and the sixth switch circuit Q6.

[0062] In the embodiments of the present disclosure, two charging modes, 1:4 and 1:2, are provided, which can be applied to different charging situations to obtain high charging power and excellent charging efficiency and reduce charging time.

[0063] In some embodiments, the second inductor may be replaced by a first sub-inductor connected in series at the first output terminal and a second sub-inductor connected in series at the second output terminal, and the first sub-inductor, the second sub-inductor and the second inductor have the same inductive reactance.

[0064] In the embodiments of the present disclosure, by replacing the second inductor with a first sub-inductor and a second sub-inductor having the same inductive reactance as the second inductor, the design of the charging circuit can be more flexible, providing an alternative solution for the arrangement of components of the charging circuit.

[0065] In some embodiments, Figures 2 to 8 As shown, the first switch circuit Q1 includes a first MOS transistor. The second switch circuit Q2 includes a second MOS transistor. The third switch circuit Q3 includes a third MOS transistor. The fourth switch circuit Q4 includes a fourth MOS transistor. The fifth switch circuit Q5 includes a fifth MOS transistor. The sixth switch circuit Q6 includes a sixth MOS transistor. The on-off of the MOS transistor controls the on-off of the switch circuit.

[0066] In some embodiments, the first MOS tube is an N-channel MOS tube. The second MOS tube is an N-channel MOS tube. The third MOS tube is an N-channel MOS tube. The fourth MOS tube is an N-channel MOS tube. The fifth MOS tube is an N-channel MOS tube. The sixth MOS tube is an N-channel MOS tube. The N-channel MOS tube is turned on at high voltage, which is conducive to accurate control.

[0067] The present disclosure also proposes a charging chip, comprising the charging circuit of the present disclosure.

[0068] The charging chip can charge the battery quickly and stably with high charging efficiency.

[0069] The present disclosure also provides an electronic device, comprising the charging chip of the present disclosure.

[0070] The electronic device in the embodiment of the present disclosure can achieve high-efficiency and stable charging.

[0071] In some embodiments, the electronic device may be a mobile terminal with a rechargeable battery, such as a mobile phone.

[0072] It is to be understood that in the present disclosure, "plurality" refers to two or more than two, and other quantifiers are similar. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship. The singular forms "a", "the" and "the" are also intended to include plural forms, unless the context clearly indicates other meanings.

[0073] It is further understood that the terms "first", "second", etc. are used to describe various information, but such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other, and do not indicate a specific order or degree of importance. In fact, the expressions "first", "second", etc. can be used interchangeably. For example, without departing from the scope of the present disclosure, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information.

[0074] It will be further understood that the terms “center”, “longitudinal”, “lateral”, “front”, “back”, “up”, “down”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present embodiment and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation.

[0075] It can be further understood that, unless otherwise specified, “connection” includes a direct connection without other components between the two, and also includes an indirect connection with other components between the two.

[0076] It is further understood that, although the operations are described in a specific order in the drawings in the embodiments of the present disclosure, it should not be understood as requiring the operations to be performed in the specific order shown or in a serial order, or requiring the execution of all the operations shown to obtain the desired results. In certain environments, multitasking and parallel processing may be advantageous.

[0077] 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. This application 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 following claims.

[0078] 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: include: Current input terminal; A first charging circuit includes a first output terminal; A second charging circuit includes a second output terminal; as well as First inductor; The first charging circuit and the second charging circuit are connected in parallel to the current input end, and the first output end and the second output end are connected to the first inductor respectively.

2. The charging circuit according to claim 1, characterized in that: The first charging circuit comprises a first switch circuit and a first capacitor connected in series between the current input terminal and the first output terminal; one end of the first capacitor is connected to the first output terminal, and the other end is connected to the first output terminal through a third switch circuit; and / or The second charging circuit includes a second switch circuit and a second capacitor connected in series between the current input terminal and the second output terminal; one end of the second capacitor is connected to the second output terminal, and the other end is connected to the second output terminal through a fourth switch circuit.

3. The charging circuit according to claim 1 or 2, characterized in that: The first output terminal is grounded through a sixth switch circuit, and the second output terminal is grounded through a fifth switch circuit.

4. The charging circuit according to claim 1, characterized in that: The charging circuit further includes a second inductor, one end of the second inductor is connected to the first output end, the other end of the second inductor is connected to the second output end, and a portion between the two ends of the second inductor is connected to the first inductor.

5. The charging circuit according to claim 4, characterized in that: The inductive reactance of the second inductor distributed on both sides of the connection point between the first inductor and the second inductor is the same.

6. The charging circuit according to claim 5, characterized in that: The inductive reactance of the first inductor is half of the inductive reactance of the second inductor.

7. The charging circuit according to claim 2, characterized in that: The first output terminal is grounded through a sixth switch circuit, and the second output terminal is grounded through a fifth switch circuit; The first switch circuit includes a first MOS transistor, the second switch circuit includes a second MOS transistor, the third switch circuit includes a third MOS transistor, the fourth switch circuit includes a fourth MOS transistor, the fifth switch circuit includes a fifth MOS transistor, and the sixth switch circuit includes a sixth MOS transistor.

8. The charging circuit according to claim 7, characterized in that: The first MOS tube, the second MOS tube, the third MOS tube, the fourth MOS tube, the fifth MOS tube, and the sixth MOS tube are all N-channel MOS tubes.

9. A charging chip, characterized in that: The charging circuit comprises the charging circuit according to any one of claims 1 to 8.

10. An electronic device, characterized in that: Including the charging chip as claimed in claim 9.

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