Charging control circuit, chip, charging circuit, equipment and charging control method

Abstract

The invention relates to the technical field of power supplies, in particular to a charging control circuit, a chip, a charging circuit, equipment and a charging control method, and the charging control circuit comprises a charging management unit connected with a first interface, and the charging management unit is used for obtaining charging parameters according to at least one preset charging protocol; the charging control unit is connected with the charging management unit, and the charging control unit is used for outputting electric power according to the charging parameters and obtaining current charging information of the external equipment through the charging management unit so as to control a display unit to display the current charging information; the current charging information is obtained through the preset charging protocol, the current charging information of the external device can be displayed in the charging process, when the screen of the mobile terminal is turned off, a user can directly know the current charging information through display, the screen of the mobile terminal does not need to be turned on again, tedious operation is avoided, and user experience is improved.

Description

Technical Field

[0001] The present application relates to the field of power supply technology, and in particular to a charging control circuit, a chip, a charging circuit, a device and a charging control method. Background Art

[0002] With the development of mobile communication technology, the use of mobile terminals has become more extensive and popular. There are more and more types of mobile terminals for individual users, such as mobile phones, laptops, tablets, smart watches and wireless headphones. Users often need to use the same charging power supply to charge multiple mobile terminals of different brands or different product types. At present, users can only know the current charging information through the mobile terminal. When the screen of the mobile terminal goes out, the user has to light up the screen of the mobile terminal again and then check the current charging information. The operation is cumbersome and not conducive to improving the user experience. Summary of the invention

[0003] In view of the above problems, the embodiments of the present application provide a charging control circuit, chip, charging circuit, device and charging control method to solve the technical problem that the current charging information of the mobile terminal cannot be displayed according to the charging protocol with the best matching degree.

[0004] In a first aspect, an embodiment of the present application provides a charging control circuit, including:

[0005] a charging management unit connected to the first interface, the charging management unit being configured to obtain charging parameters according to at least one preset charging protocol;

[0006] A charging control unit, wherein the charging control unit is connected to the charging management unit, and the charging control unit is used to output power according to the charging parameters, and obtain current charging information of an external device through the charging management unit to control a display unit to display the current charging information.

[0007] In a second aspect, an embodiment of the present application provides a charging control chip, comprising the above-mentioned charging control circuit.

[0008] In a third aspect, an embodiment of the present application provides a charging circuit, including:

[0009] A first interface, the first interface comprising a first pin, a second pin and a third pin;

[0010] The above-mentioned charging control chip;

[0011] A load switch unit, the load switch unit is connected between the third pin and the battery unit, the load switch unit is connected to the charging control chip, and the load switch unit is used to control the connection or disconnection of the charging path according to the first control signal sent by the charging control chip;

[0012] a DC-DC conversion unit, the DC-DC conversion unit being connected between the load switch unit and the battery unit, the DC-DC conversion unit being connected to the charging control chip, and the DC-DC conversion unit being used to control the output voltage of the battery unit according to a second control signal sent by the charging control chip;

[0013] A display unit is connected to the charging control chip, and is used to display current charging information of an external device according to a third control signal sent by the charging control chip.

[0014] In a fourth aspect, an embodiment of the present application provides an electronic device, wherein the electronic device includes the above-mentioned charging circuit.

[0015] In a fifth aspect, an embodiment of the present application provides a charging control method, including:

[0016] Obtain charging parameters according to the preset charging protocol;

[0017] Power is output according to the charging parameters, and current charging information of the external device is acquired according to the preset charging protocol, so as to control a display unit to display the current charging information.

[0018] The embodiments of the present application provide a charging control circuit, a chip, a charging circuit, a device and a charging control method, wherein the charging control circuit comprises: a charging management unit connected to a first interface, wherein the charging management unit is used to obtain charging parameters according to at least one preset charging protocol; a charging control unit, wherein the charging control unit is connected to the charging management unit, wherein the charging control unit is used to output power according to the charging parameters, and obtain current charging information of an external device through the charging management unit to control a display unit to display the current charging information; the current charging information is obtained through a preset charging protocol, and the current charging information of the external device can be displayed during the charging process. When the screen of the mobile terminal is off, the user can directly understand the current charging information through the display without having to relight the screen of the mobile terminal, thereby avoiding cumbersome operations and improving the user experience.

[0019] These and other aspects of the present application will become more clearly understood in the description of the following embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 An application scenario diagram of the charging control circuit provided in an embodiment of the present application is shown.

[0021] Figure 2 A schematic diagram of the structure of a charging control circuit provided in an embodiment of the present application is shown.

[0022] Figure 3 A schematic diagram of the structure of a charging control circuit provided in an embodiment of the present application is shown.

[0023] Figure 4 A schematic diagram of the structure of a charging control circuit provided in an embodiment of the present application is shown.

[0024] Figure 5 A schematic diagram of the structure of a charging control chip provided in an embodiment of the present application is shown.

[0025] Figure 6 A schematic diagram of the structure of a charging circuit provided in an embodiment of the present application is shown.

[0026] Figure 7 A schematic diagram of the structure of a first interface and a load switch unit in a charging circuit provided in an embodiment of the present application is shown.

[0027] Figure 8 A schematic diagram of the structure of a DC-DC conversion unit in a charging circuit provided in an embodiment of the present application is shown.

[0028] Fig. 9 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application is shown.

[0029] Fig.10 A flow chart of a charging control method provided in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0030] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0031] In order to enable those skilled in the art to better understand the solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present application.

[0032] In the embodiments of the present application, it should be noted that, in this article, relational terms such as first and second, etc. are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0033] Moreover, the terms "comprises," "comprising," or any other variation thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0034] In the description of the embodiments of the present application, words such as "example" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "example" or "for example" in the embodiments of the present application is not to be interpreted as being more preferred or having more advantages than another embodiment or design. The use of words such as "example" or "for example" is intended to present relative concepts in a clear manner.

[0035] In addition, the "plurality" in the embodiments of the present application refers to two or more than two. In view of this, in the embodiments of the present application, "plurality" can also be understood as "at least two". "At least one" can be understood as one or more, for example, one, two or more. For example, including at least one means including one, two or more, and there is no limit on which ones are included. For example, including at least one of A, B and C, then A, B, C, A and B, A and C, B and C, or A, B and C can be included.

[0036] It should be noted that, in the embodiments of the present application, "and / or" describes the association relationship of the associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / ", unless otherwise specified, generally indicates that the associated objects before and after are in an "or" relationship.

[0037] It should be noted that in the embodiments of the present application, "connection" can be understood as electrical connection, and the connection between two electrical components can be a direct or indirect connection between the two electrical components. For example, the connection between A and B can be either a direct connection between A and B or an indirect connection between A and B through one or more other electrical components.

[0038] The first pole / first end of each transistor used in the embodiments of the present application is one of the source and the drain, and the second pole / second end of each transistor is the other of the source and the drain. Since the source and drain of the transistor can be symmetrical in structure, the source and drain thereof can be structurally indistinguishable, that is, the first pole / first end and the second pole / second end of the transistor in the embodiments of the present application can be structurally indistinguishable. Exemplarily, in the case where the transistor is a P-type transistor, the first pole / first end of the transistor is the source, and the second pole / second end is the drain; exemplarily, in the case where the transistor is an N-type transistor, the first pole / first end of the transistor is the drain, and the second pole / second end is the source.

[0039] The charging control circuit 100 provided in the present application can be applied to Figure 1 In the portable power supply device 200 shown, the portable power supply device 200 includes a Type-C interface 201, and a charging control circuit 100 is connected to the Type-C interface 201, and the charging control circuit 100 is used to control the charging of an external device 300 connected to the Type-C interface 201.

[0040] An embodiment of the present application provides a charging control circuit 100, see Figure 2 As shown, the charging control circuit 100 of this embodiment includes: at least one charging management unit 10 and a charging control unit 13 .

[0041] The charging management unit 10 is connected to the first interface 20. The charging management unit 10 is configured with one or more preset charging protocols. Before charging and during charging, the charging management unit 10 communicates with the external device 300 based on at least one preset charging protocol to obtain charging-related information from the external device 300. The charging management unit 10 can be used to obtain charging parameters according to at least one preset charging protocol. Exemplarily, the charging parameters may include at least one of a charging voltage range, a charging current range, a charging power range, and a charging temperature range.

[0042] The charging control unit 13 is used to output power according to the charging parameters acquired by the charging management unit 10. Exemplarily, the charging control unit 13 can control the output voltage, output current or output power according to the charging parameters.

[0043] During the charging process, the charging control unit 13 obtains the real-time charging parameters of the external device 300 through the charging management unit 10 to output power according to the real-time charging parameters. For example, the charging control unit 13 can adjust the output voltage, output current or output power in real time according to the real-time charging parameters.

[0044] The charging control unit 13 is also used to obtain the current charging information of the external device 300 through the charging management unit 10 during the charging process, so as to control the display unit to display the current charging information. Exemplarily, the current charging information includes the current battery capacity. When the screen of the external device 300 is off, the user can understand the charging progress through the current battery capacity displayed on the display unit without charging and lighting up the screen of the external device 300. Exemplarily, the current charging information includes at least multiple of the current battery capacity, the manufacturer information of the external device, the number of battery strings, the battery design capacity, the last saturated capacity of the battery, the current charging and discharging status of the battery, the battery temperature information, the effective status of the battery, the minimum power, the maximum power, the working power, and the mode of the external device. The user can fully understand the status of the battery of the external device 300 through the above information.

[0045] In this embodiment, the current charging information is obtained through a preset charging protocol, and the current charging information of the external device can be displayed during the charging process. When the screen of the mobile terminal is off, the user can directly understand the current charging information through the display without relighting the screen of the mobile terminal, thereby avoiding cumbersome operations and improving the user experience.

[0046] As an implementation method, due to the large number of mobile terminal manufacturers and the rapid update speed of mobile terminal products, the fast charging protocols that can be adapted in the charging power supply are usually limited, and it is difficult for the charging power supply to be compatible with the charging protocols of mobile terminals of different brands, models or product types.

[0047] See also Figure 3 As shown, two charging management units are provided, and the two charging management units are respectively a first charging management unit 11 and a second charging management unit 12 .

[0048] The first charging management unit 11 is connected to the first pin 21 of the first interface 20. The first charging management unit 11 is configured with at least one first charging protocol. The at least one first charging protocol is a protocol for communication via the first pin 21. Different first charging protocols may correspond to different versions of the first type of charging communication protocol. Exemplarily, the first charging protocol may be a PD (Power Delivery, charging management) protocol, that is, the first type of charging communication protocol may be a PD protocol, and the multiple first charging protocols may be PD2.0, PD3.0, and PD3.1, respectively.

[0049] The first charging management unit 11 communicates with the external device 300 based on at least one first charging protocol before charging and during charging to obtain charging-related information from the external device 300. The first charging management unit 11 can be used to obtain a first charging parameter according to at least one first charging protocol. Exemplarily, the first charging parameter may include at least one of a charging voltage range, a charging current range, a charging power range, and a charging temperature range.

[0050] The second charging management unit 12 is connected to the second pin 22 of the first interface 20. The second charging management unit 12 is configured with at least one second charging protocol. The at least one second charging protocol is a protocol for communicating via the second pin 22. Different second charging protocols may correspond to different types of charging communication protocols and different versions of the same type of charging communication protocol. For example, different second charging protocols may include a second type of charging communication protocol or different versions of a second type of charging communication protocol, a third type of charging communication protocol or different versions of a third type of charging communication protocol, ..., an Nth type of charging communication protocol or different versions of an Nth type of charging communication protocol. The second charging protocol can be one of Qualcomm QC (Quick Charge) protocol, Huawei FCP (Fast Charge Protocol), Huawei SCP (Super Charge Protocol), and Samsung AFC (Adaptive Fast Charging) protocol, that is, the second type of charging communication protocol can be Qualcomm QC protocol (QC2.0, QC3.0, QC4.0 or QC5.0), the third type of charging communication protocol can be Huawei FCP, the fourth type of charging communication protocol can be Huawei SCP, and the fifth type of charging communication protocol can be Samsung AFC protocol.

[0051] The second charging management unit 12 communicates with the external device 300 based on at least one second charging protocol before charging and during charging to obtain charging-related information from the external device 300. The second charging management unit 12 can be used to obtain a second charging parameter according to at least one second charging protocol. Exemplarily, the second charging parameter may include at least one of a charging voltage range, a charging current range, a charging power range, and a charging temperature range.

[0052] The charging control unit 13 is connected to the first charging management unit 11 and the second charging management unit 12. After obtaining the first charging parameter, the first charging management unit 11 sends the first charging parameter to the charging control unit 13, or after obtaining the second charging parameter, the second charging management unit 12 sends the second charging parameter to the charging control unit 13.

[0053] The charging control unit 13 is used to output power according to the first charging parameter obtained by the first charging management unit 11 or the second charging parameter obtained by the second charging management unit 12. That is, the charging control unit 13 is used to output power according to the first charging parameter when charging is performed using the first charging protocol, and to output power according to the second charging parameter when charging is performed using the second charging protocol. Exemplarily, the charging control unit 13 can control the output voltage, output current or output power according to the first charging parameter or the second charging parameter.

[0054] During the charging process, the charging control unit 13 obtains the real-time first charging parameter of the external device 300 through the first charging management unit 11 or obtains the real-time second charging parameter of the external device 300 through the second charging management unit 12, so as to output power according to the real-time first charging parameter or the real-time second charging parameter. Exemplarily, the charging control unit 13 can adjust the output voltage, output current or output power in real time according to the real-time first charging parameter or the real-time second charging parameter.

[0055] The charging control unit 13 is also used to obtain the current charging information of the external device 300 through the first charging management unit 11 or the second charging management unit 12 during the charging process, and control the display unit to display the current charging information when the current charging information is successfully obtained. Exemplarily, the current charging information includes the current battery capacity. When the screen of the external device 300 is off, the user can understand the charging progress through the current battery capacity displayed on the display unit without charging and lighting up the screen of the external device 300. Exemplarily, the current charging information includes at least multiple of the current battery capacity, the manufacturer information of the external device, the number of battery strings, the battery design capacity, the battery's last saturated capacity, the battery's current charge and discharge status, the battery temperature information, the battery's effective status, the minimum power, the maximum power, the working power, and the mode of the external device. The user can fully understand the status of the battery of the external device 300 through the above information.

[0056] In this embodiment, the compatibility of different charging protocols is improved by adapting at least one first charging protocol communicated via the first pin through the first charging management unit, and adapting at least one second charging protocol communicated via the second pin through the second charging management unit. During the charging process, the current charging information of the external device can be displayed according to the charging protocol with the best match.

[0057] As an implementation method, the first interface 20 can be a Type-C interface; the first pin 21 can be a CC (Connection Configuration) pin, for example, the first pin 21 is a CC1 pin or a CC2 pin; the second pin 22 can be a data transmission pin, for example, the second pin 22 is a DM (Data Minus) pin or a DP (Data Plus) pin.

[0058] As an implementation manner, the first charging management unit 11 is used to send a first charging parameter acquisition instruction to the external device 300 via the first pin 21 according to the first charging protocol when it is detected that the external device 300 is connected to the charging control circuit 100 via the first pin 21.

[0059] Among them, if the external device 300 supports the first charging protocol, when the external device 300 is connected to the first interface 20, it is connected to the first pin 21, and the first charging management unit 11 communicates with the external device 300 through the first pin 21 to negotiate and determine the first charging protocol to be used currently, and sends a first charging parameter acquisition instruction to the external device 300 via the first pin 21 according to the negotiated first charging protocol. The external device 300 receives the first charging parameter acquisition instruction, obtains the corresponding first charging parameter according to the first charging parameter acquisition instruction, and sends the first charging parameter to the first charging management unit 11 according to the negotiated first charging protocol.

[0060] In some embodiments, the first charging management unit 11 is further configured to send a current charging information acquisition instruction to the external device 300 via the first pin 21 according to the first charging protocol when charging is performed using the first charging protocol.

[0061] The first charging management unit 11 communicates with the external device 300 through the first pin 21 to obtain the current charging information in real time. The first charging management unit 11 can send a current charging information acquisition instruction every first preset time so that the charging control unit 13 can continuously update the current charging information. The external device 300 receives the current charging information acquisition instruction, obtains the corresponding current charging information according to the current charging information acquisition instruction, and sends the current charging information to the first charging management unit 11 according to the negotiated first charging protocol.

[0062] As an embodiment, the second charging management unit 12 is also used to obtain a second charging protocol matching the external device 300 from at least one preset second charging protocol when it is detected that the external device 300 is connected to the charging control circuit 100 via the second pin 22, and send a second charging parameter acquisition instruction to the external device 300 via the second pin 22 according to the second charging protocol matching the external device 300.

[0063] Among them, if the external device 300 does not support the first charging protocol, when the external device 300 is connected to the first interface 20, it is connected to the second pin 22, and the second charging management unit 12 communicates with the external device 300 through the second pin 22 to negotiate and determine the second charging protocol to be used currently, and sends a second charging parameter acquisition instruction to the external device 300 via the second pin 22 according to the negotiated second charging protocol. The external device 300 receives the second charging parameter acquisition instruction, obtains the corresponding second charging parameters according to the second charging parameter acquisition instruction, and sends the second charging parameters to the second charging management unit 12 according to the negotiated second charging protocol.

[0064] Among them, the second charging protocol can be matched according to the device production information of the external device 300. The device production information may include the manufacturer information or the manufacturer information and the product type of the external device. For example, if the external device 300 is a Huawei mobile phone, Huawei SCP or Huawei FCP is matched first. For another example, if the external device 300 is a Xiaomi mobile phone, Qualcomm QC protocol is matched first.

[0065] In some embodiments, the second charging management unit 12 is further configured to send a current charging information acquisition instruction to the external device 300 via the second pin 22 according to the second charging protocol when charging is performed using the second charging protocol.

[0066] The second charging management unit 12 communicates with the external device 300 through the second pin 22 to obtain the current charging information in real time. The second charging management unit 12 can send a current charging information acquisition instruction every first preset time period so that the charging control unit 13 can continuously update the current charging information. The external device 300 receives the current charging information acquisition instruction, obtains the corresponding current charging information according to the current charging information acquisition instruction, and sends the current charging information to the second charging management unit 12 according to the negotiated second charging protocol.

[0067] As an implementation, see Figure 4 As shown, the charging control circuit 100 further includes a data transmission management unit 14 connected to the second pin 22 , and the data transmission management unit 14 is used to perform data transmission according to the first data transmission protocol.

[0068] The data transmission management unit 14 may be configured with at least one first data transmission protocol. The first switching switch 15 may be configured to switch the path. The first switching switch 15 is connected to the second pin 22, the second charging management unit 12 and the data transmission management 14 respectively. The second pin 22 and the second charging management unit 12 form a first communication path, and the second pin 22 and the data transmission management 14 form a second communication path. The first switching switch 15 is used to switch between the first communication path and the second communication path. When switching to the first communication path, the first communication path is connected and the second communication path is disconnected; when switching to the second communication path, the first communication path is disconnected and the second communication path is connected.

[0069] An embodiment of the present application provides a charging control chip 30, see Figure 5 As shown, the charging control chip 30 includes the charging control circuit 100 mentioned above.

[0070] The chip may be, but is not limited to, a SOC (System on Chip) chip or a SIP (system in package) chip.

[0071] An embodiment of the present application provides a charging circuit 40, see Figure 6 As shown, the charging circuit 40 includes: a first interface 20 , a charging control chip 30 , a load switch unit 41 , a DC-DC conversion unit 42 and a display unit 43 .

[0072] The first interface 20 includes a first pin 21, a second pin 22 and a third pin 23. The third pin 23 is used to output power. The description of the first pin 21 and the second pin 22 refers to the above embodiments and implementation methods.

[0073] The load switch unit 41 is connected between the third pin 23 and the battery unit 50. The load switch unit 41 is connected to the charging control chip 30. The load switch unit 41 is used to control the connection or disconnection of the charging path according to the first control signal sent by the charging control chip 30. When the load switch unit 41 is turned on, the charging path is connected; when the load switch unit 41 is turned off, the charging path is disconnected. Specifically, the load switch unit 41 is connected to the charging control unit 13 of the charging control chip 30, and the charging control unit 13 sends the first control signal.

[0074] The DC-DC conversion unit 42 is connected between the load switch unit 41 and the battery unit 50, and is connected to the charging control chip 30. The DC-DC conversion unit 42 is used to control the output voltage of the battery unit 50 according to the second control signal sent by the charging control chip 30. Specifically, the DC-DC conversion unit 42 is connected to the charging control unit 13 of the charging control chip 30, and the charging control unit 13 sends the second control signal, which is generated by the charging control unit 13 according to the first charging parameter or the second charging parameter.

[0075] The display unit 43 is connected to the charging control chip 30, and the display unit 43 is used to display the current charging information of the external device 300 according to the third control signal sent by the charging control chip 30. Specifically, the display unit 43 is connected to the charging control unit 13 of the charging control chip 30, and the charging control unit 13 sends the third control signal, which is generated by the charging control unit 13 according to the current charging information.

[0076] In this embodiment, the current charging information is obtained through a preset charging protocol, and the current charging information of the external device can be displayed during the charging process. When the screen of the mobile terminal is off, the user can directly understand the current charging information through the display without relighting the screen of the mobile terminal, thereby avoiding cumbersome operations and improving the user experience.

[0077] As an implementation manner, the charging control chip 30 includes a first charging management unit 11 and a second charging management unit 12 .

[0078] In this embodiment, the compatibility of different charging protocols is improved by adapting at least one first charging protocol communicated via the first pin through the first charging management unit, and adapting at least one second charging protocol communicated via the second pin through the second charging management unit. During the charging process, the power output to the external device can be controlled according to the charging protocol with the best match, and the current charging information of the external device can also be displayed according to the charging protocol with the best match.

[0079] As an implementation, see Figure 7 As shown, the load switch unit 41 includes a first switch unit Q1, a first end of the first switch unit Q1 is connected to the third pin 23, a second end of the first switch unit Q1 is connected to the DC-DC conversion unit 42, and a control end of the first switch unit Q1 is connected to the charging control chip 30. The charging control unit 13 of the charging control chip 30 sends a first control signal to the control end of the first switch unit Q1, and the first switch unit Q1 is turned on or off according to the first control signal.

[0080] In some embodiments, the first switch unit Q1 may be a transistor unit. For example, the first switch unit Q1 may be a PMOS transistor.

[0081] In some embodiments, the load switch unit 41 further includes a first resistor unit 411, the first resistor unit 411 includes at least two resistors connected in series, the first end of the first resistor unit 411 is connected to the second end of the first switch unit Q1, the second end of the first resistor unit 411 is connected to the charging control chip 30, the first connection node 412 of the first resistor unit 411 is connected to the control end of the first switch unit Q1, and the first connection node 412 is a connection node between any two adjacent resistors. For example, in Figure 7 As shown, the first resistor unit 411 includes a first resistor R6 and a second resistor R11 connected in series, and the first connection node 412 is a connection node between the first resistor R6 and the second resistor R11.

[0082] In some embodiments, please refer to Figure 7 As shown, the charging circuit 40 further includes a second resistor unit 44 connected to the third pin 23, the second resistor unit 44 includes at least two resistors connected in series, a first end of the second resistor unit 44 is connected to the third pin 23, a second end of the second resistor unit 44 is grounded, a second connection node 441 of the second resistor unit 44 is connected to the charging control chip 30, and the second connection node 441 is a connection node between any two adjacent resistors. For example, Figure 7 As shown, the second resistance unit 44 includes a third resistor R7 and a fourth resistor R12 connected in series in sequence, the second connection node 441 is the connection node between the third resistor R7 and the fourth resistor R12, and the second resistance unit 44 sends a voltage feedback signal to the charging control chip 30 through the second connection node 441.

[0083] As an implementation, see Figure 8As shown, the DC-DC conversion unit 42 includes a voltage output terminal 42a connected to the third pin 23, a first controller 421, a second switch unit Q2, a third switch unit Q3, a fourth switch unit Q4, a fifth switch unit Q5 and a first inductor unit L1, a first end of the second switch unit Q2 is connected to the voltage output terminal 42a through a first regulating resistor unit 422, a second end of the second switch unit Q2 is connected to a first end of the third switch unit Q3, a second end of the third switch unit Q3 is grounded, a first end of the fourth switch unit Q4 is connected to the battery unit 50 through a second regulating resistor unit 423, and a first end of the fourth switch unit Q4 is connected to the battery unit 50 through a second regulating resistor unit 424. The two ends are connected to the first end of the fifth switch unit Q5, the second end of the fifth switch unit Q5 is grounded, the first end of the first inductor unit L1 is connected to the connection node of the second switch unit Q2 and the third switch unit Q3, the second end of the first inductor unit L1 is connected to the connection node of the fourth switch unit Q4 and the fifth switch unit Q5, and the control end of the second switch unit Q2, the control end of the third switch unit Q3, the control end of the fourth switch unit Q4 and the control end of the fifth switch unit Q5 are respectively connected to the first control pin HD1, the second control pin LD1, the third control pin HD2 and the fourth control pin LD2 of the first controller 421.

[0084] The second switch unit Q2 , the third switch unit Q3 , the fourth switch unit Q4 , the fifth switch unit Q5 and the first inductor unit L1 realize synchronous voltage boost and synchronous voltage drop.

[0085] In some embodiments, the second switch unit Q2 is turned on, the third switch unit Q3 is turned off, the fourth switch unit Q4 and the fifth switch unit Q5 can be transistor units respectively. For example, the second switch unit Q2 is turned on, the third switch unit Q3 is turned off, the fourth switch unit Q4 and the fifth switch unit Q5 can be NMOS tubes respectively, and a parasitic diode is arranged between the first end and the second end of each NMOS tube to protect the NMOS tube from overvoltage.

[0086] In some embodiments, please refer to Figure 8As shown, the connection nodes of the second switch unit Q2 and the third switch unit Q3 are respectively connected to the pin BT1 and the pin SW1 of the first controller 421, and a capacitor C16 is provided between the pin BT1 and the pin SW1. The connection nodes of the fourth switch unit Q4 and the fifth switch unit Q5 are respectively connected to the pin BT2 and the pin SW2 of the first controller 421, and a capacitor C25 is provided between the pin BT2 and the pin SW2. The first end of the first regulating resistor unit 422 is connected to the pin SNS1P of the first controller 421 through the resistor R13, and the second end of the first regulating resistor unit 422 is connected to the pin SNS1N of the first controller 421 through the resistor R14, and a capacitor C17 is provided between the pin SNS1P and the pin SNS1N, and the pin SNS1P and the pin SNS1N are used to collect the voltage signal on one side of the voltage output terminal 42a. The first end of the second regulating resistor unit 423 is connected to the pin SNS2P of the first controller 421 through the resistor R28, and the second end of the second regulating resistor unit 423 is connected to the pin SNS2N of the first controller 421 through the resistor R31. A capacitor C26 is provided between the pin SNS2P and the pin SNS2N. The pin SNS2P and the pin SNS2N are used to collect the voltage signal on one side of the battery unit 50. For example, Figure 8 As shown, the first adjusting resistor unit 422 includes a resistor R1 , and the second adjusting resistor unit 423 includes a resistor R2 and a resistor R5 connected in parallel.

[0087] In some embodiments, the DC-DC conversion unit 42 further includes a first capacitor C1 connected in series between a first end of the second switch unit Q2 and a ground end, a second capacitor C2 connected in series between a first end of the fourth switch unit Q4 and a ground end, a first resistor and capacitor unit 424 connected in series between a second end of the second switch unit Q2 and a ground end, and a second resistor and capacitor unit 425 connected in series between a second end of the fourth switch unit Q4 and a ground end. Exemplarily, the first resistor and capacitor unit 424 includes a resistor R15 and a capacitor C18 connected in series, and the second resistor and capacitor unit 425 includes a resistor R16 and a capacitor C19 connected in series.

[0088] In this embodiment, the operation of the DC-DC conversion unit can be made more stable by providing the first capacitor, the second capacitor, the first resistor-capacitor unit, and the second resistor-capacitor unit.

[0089] When the first interface 20 may be a Type-C interface, the third pin 23 may be a VBUS pin.

[0090] In some embodiments, please refer to Figure 8As shown, the DC-DC conversion unit 42 further includes a third resistor unit 426 connected to the voltage output terminal 42a of the DC-DC conversion unit 42 and a sixth switch unit Q6 connected in series between the third resistor unit 426 and the ground terminal. Figure 8 As shown, the third resistor unit 426 includes a resistor R3 and a resistor R4 connected in parallel.

[0091] In some embodiments, please refer to Figure 7 As shown, the first interface 20 also includes a fourth pin 24, and the charging circuit 40 also includes a fourth resistor unit 45 and a fifth resistor unit 46 connected to the fourth pin 24. The fourth resistor unit 45 includes at least two resistors connected in series. The first end of the fourth resistor unit 45 is connected to the fourth pin 24, and the second end of the fourth resistor unit 45 is used to receive the first voltage stabilization signal. The third connection node 451 of the fourth resistor unit 45 is connected to the control end of the sixth switch unit Q6, and the third connection node 451 is a connection node between any two adjacent resistors. The fifth resistor unit 46 is connected in series between the fourth pin 24 and the ground terminal. For example, Figure 7 As shown, the fourth resistor unit 45 includes a resistor R21 and a resistor R22 connected in series in sequence, the third connection node 451 is a connection node between the resistor R21 and the resistor R22, and the fifth resistor unit 46 includes a resistor R25.

[0092] When the first interface 20 may be a Type-C interface, the fourth pin 24 may be a GND (ground) pin.

[0093] In some embodiments, please refer to Figure 8 As shown, the charging circuit 40 further includes a temperature feedback unit 47, which includes a sixth resistor unit 471 and a thermistor unit 472. The first end of the sixth resistor unit 471 is used to receive the second voltage stabilization signal, the second end of the sixth resistor unit 471 is connected to the first end of the thermistor unit 472, the second end of the thermistor unit 472 is grounded, and the connection node 473 between the sixth resistor unit 471 and the thermistor unit 472 is connected to the DC-DC conversion unit 42. The thermistor unit 472 may include a negative temperature coefficient thermistor NTC1, and the connection node 473 may be connected to the pin ADIN of the first controller 421 in the DC-DC conversion unit 42 to output a temperature signal to the first controller 421.

[0094] In addition, the first controller 421 and the charging control chip 30 can communicate with each other via an I2C (Inter-Integrated Circuit) bus.

[0095] The present application embodiment also provides an electronic device 400, see Fig. 9As shown, the electronic device 400 includes a device body and a charging circuit 40 as described above, which is arranged in the device body. The electronic device can be, but is not limited to, a power supply device, a weight scale, a body fat scale, a nutrition scale, a pulse oximeter, a human body composition analyzer, a display, a USB (Universal Serial Bus) docking station, a car, a smart wearable device, a mobile terminal, and a smart home device. The power supply device can be, for example, a power bank. Smart wearable devices include, but are not limited to, smart watches, smart bracelets, and cervical massagers. Mobile terminals include, but are not limited to, smart phones, laptops, tablet computers, and POS (point of sales terminal). Smart home devices include, but are not limited to, smart sockets, smart rice cookers, smart sweepers, and smart lights.

[0096] The electronic device of this embodiment obtains the current charging information through a preset charging protocol, and can display the current charging information of the external device during the charging process. When the screen of the mobile terminal is off, the user can directly understand the current charging information through the display without having to relight the screen of the mobile terminal, thereby avoiding cumbersome operations and improving the user experience.

[0097] An embodiment of the present application provides a charging control method. Fig.10 As shown, the charging control method includes the following steps:

[0098] S10, obtaining charging parameters according to a preset charging protocol.

[0099] S20, outputting power according to the charging parameters, acquiring current charging information of the external device according to a preset charging protocol, and controlling the display unit to display the current charging information.

[0100] The charging control method of this embodiment obtains the current charging information through a preset charging protocol, and can display the current charging information of the external device during the charging process. When the screen of the mobile terminal is off, the user can directly understand the current charging information through the display without relighting the screen of the mobile terminal, thereby avoiding cumbersome operations and improving the user experience.

[0101] As an implementation method, the charging control method includes the following steps:

[0102] S11, when charging is performed using a first charging protocol, obtaining a first charging parameter according to the first charging protocol, and outputting power according to the first charging parameter; obtaining current charging information of an external device according to the first charging protocol, and controlling a display unit to display the current charging information when the current charging information is successfully obtained.

[0103] S12, when charging is performed using the second charging protocol, obtaining a second charging parameter according to the second charging protocol, and outputting power according to the second charging parameter; obtaining current charging information of the external device according to the second charging protocol, and controlling the display unit to display the current charging information when the current charging information is successfully obtained.

[0104] The charging control method of this embodiment can be implemented by the charging control circuit 100 of the above embodiment. For related descriptions, please refer to the embodiment and various implementations of the charging control circuit 100 .

[0105] As an implementation manner, before step S11, the method further includes:

[0106] S21, when it is detected that the external device is connected to the charging control circuit through the first pin, sending a first charging parameter acquisition instruction to the external device through the first pin according to the first charging protocol;

[0107] S22, receiving a first charging parameter sent by an external device in response to a first charging parameter acquisition instruction.

[0108] As an implementation manner, before step S12, the method further includes:

[0109] S31, when it is detected that the external device is connected to the charging control circuit through the second pin, obtaining a second charging protocol matching the external device from at least one preset second charging protocol;

[0110] S32, sending a second charging parameter acquisition instruction to the external device via the second pin according to a second charging protocol matching the external device;

[0111] S33, receiving a second charging parameter sent by the external device in response to the second charging parameter acquisition instruction.

[0112] In some implementations, step S31 specifically includes the following steps:

[0113] S41, sending a device production information acquisition instruction to the external device via the second pin;

[0114] S42, receiving device production information sent by the external device in response to the device production information acquisition instruction, and acquiring a second charging protocol matching the external device according to the device production information.

[0115] In some implementations, in step S11, obtaining current charging information of the external device according to the first charging protocol specifically includes the following steps:

[0116] S51, when charging is performed using a first charging protocol, sending a current charging information acquisition instruction to an external device via a first pin according to the first charging protocol;

[0117] S52, receiving current charging information sent by an external device in response to a current charging information acquisition instruction.

[0118] In some implementations, in step S12, obtaining current charging information of the external device according to the second charging protocol includes:

[0119] S61, when charging is performed using the second charging protocol, sending a current charging information acquisition instruction to the external device via the second pin according to the second charging protocol;

[0120] S62, receiving current charging information sent by an external device in response to a current charging information acquisition instruction.

[0121] The above is only an implementation method of the present application. It should be pointed out that a person skilled in the art can make improvements without departing from the inventive concept of the present application, but these improvements are within the scope of protection of the present application.

Claims

1. A charging control circuit, characterized in that: include: a charging management unit connected to the first interface, the charging management unit being configured to obtain charging parameters according to at least one preset charging protocol; A charging control unit, wherein the charging control unit is connected to the charging management unit, and the charging control unit is used to output power according to the charging parameters, and obtain current charging information of an external device through the charging management unit to control a display unit to display the current charging information.

2. The charging control circuit according to claim 1, characterized in that: The charging management units are provided with two, and the two charging management units are respectively: a first charging management unit connected to the first pin of the first interface, the first charging management unit being configured to obtain a first charging parameter according to at least one first charging protocol; a second charging management unit connected to the second pin of the first interface, the second charging management unit being configured to obtain a second charging parameter according to at least one second charging protocol; The charging control unit is connected to the first charging management unit and the second charging management unit respectively. The charging control unit is used to output power according to the first charging parameter when charging is performed using the first charging protocol, and to output power according to the second charging parameter when charging is performed using the second charging protocol. The charging control unit is also used to obtain current charging information of an external device through the first charging management unit or the second charging management unit to control the display unit to display the current charging information.

3. The charging control circuit according to claim 2, characterized in that: The first charging management unit is used to send a first charging parameter acquisition instruction to the external device via the first pin according to the first charging protocol when it is detected that the external device is connected to the charging control circuit via the first pin.

4. The charging control circuit according to claim 3, characterized in that: The first charging management unit is further configured to send a current charging information acquisition instruction to the external device via the first pin according to the first charging protocol when charging is performed using the first charging protocol.

5. The charging control circuit according to claim 2, characterized in that: The second charging management unit is also used to obtain the second charging protocol that matches the external device from at least one preset second charging protocol when it is detected that the external device is connected to the charging control circuit via the second pin, and send a second charging parameter acquisition instruction to the external device via the second pin according to the second charging protocol that matches the external device.

6. The charging control circuit according to claim 5, characterized in that: The second charging management unit is further configured to send a current charging information acquisition instruction to the external device via the second pin according to the second charging protocol when charging is performed using the second charging protocol.

7. The charging control circuit according to claim 2, characterized in that: The charging control circuit further includes a data transmission management unit connected to the second pin, and the data transmission management unit is used for performing data transmission according to a first data transmission protocol.

8. A charging control chip, characterized in that: The charging control circuit comprises the charging control circuit as claimed in any one of claims 1 to 7.

9. A charging circuit, characterized in that: include: A first interface, the first interface comprising a first pin, a second pin and a third pin; The charging control chip as claimed in claim 8; A load switch unit, the load switch unit is connected between the third pin and the battery unit, the load switch unit is connected to the charging control chip, and the load switch unit is used to control the connection or disconnection of the charging path according to the first control signal sent by the charging control chip; a DC-DC conversion unit, the DC-DC conversion unit being connected between the load switch unit and the battery unit, the DC-DC conversion unit being connected to the charging control chip, and the DC-DC conversion unit being used to control the output voltage of the battery unit according to a second control signal sent by the charging control chip; A display unit is connected to the charging control chip, and is used to display current charging information of an external device according to a third control signal sent by the charging control chip.

10. The charging circuit according to claim 9, characterized in that: The load switch unit includes a first switch unit, a first end of the first switch unit is connected to the third pin, a second end of the first switch unit is connected to the DC-DC conversion unit, and a control end of the first switch unit is connected to the charging control chip.

11. The charging circuit according to claim 9, characterized in that: The charging circuit also includes a temperature feedback unit, which includes a sixth resistor unit and a thermistor unit, wherein a first end of the sixth resistor unit is used to receive a second voltage stabilization signal, a second end of the sixth resistor unit is connected to a first end of the thermistor unit, a second end of the thermistor unit is grounded, and a connection node between the sixth resistor unit and the thermistor unit is connected to the DC-DC conversion unit.

12. An electronic device, characterized in that: The charging circuit comprises the charging circuit as claimed in any one of claims 9 to 11.

13. A charging control method, characterized in that: include: Obtain charging parameters according to the preset charging protocol; Power is output according to the charging parameters, and current charging information of the external device is acquired according to the preset charging protocol, so as to control the display unit to display the current charging information.

14. The charging control method according to claim 13, characterized in that: The charging control method comprises: When charging is performed using a first charging protocol, obtaining a first charging parameter according to the first charging protocol; outputting power according to the first charging parameter; acquiring current charging information of an external device according to the first charging protocol, so as to control a display unit to display the current charging information; When charging is performed using the second charging protocol, obtaining a second charging parameter according to the second charging protocol; Output power according to the second charging parameter; obtain current charging information of the external device according to the second charging protocol to control the display unit to display the current charging information.

15. The charging control method according to claim 14, characterized in that: When charging is performed using the first charging protocol, before acquiring the first charging parameter according to the first charging protocol, the method further includes: When it is detected that the external device is connected to the charging control circuit through the first pin, sending a first charging parameter acquisition instruction to the external device through the first pin according to the first charging protocol; A first charging parameter is received, which is sent by the external device in response to the first charging parameter acquisition instruction.

16. The charging control method according to claim 14, characterized in that: When charging is performed using the second charging protocol, before obtaining the second charging parameter according to the second charging protocol, the method further includes: When it is detected that the external device is connected to the charging control circuit via the second pin, the second charging protocol matching the external device is obtained from at least one preset second charging protocol, and a second charging parameter acquisition instruction is sent to the external device via the second pin according to the second charging protocol matching the external device; Receive a second charging parameter sent by the external device in response to the second charging parameter acquisition instruction.

17. The charging control method according to claim 14, characterized in that: The acquiring the second charging protocol matching the external device from at least one preset second charging protocol includes: Sending a device production information acquisition instruction to the external device via the second pin; Receive the device production information sent by the external device in response to the device production information acquisition instruction, and acquire the second charging protocol matching the external device according to the device production information.

18. The charging control method according to claim 14, characterized in that: The acquiring the current charging information of the external device according to the first charging protocol includes: When charging is performed using the first charging protocol, sending a current charging information acquisition instruction to the external device via the first pin according to the first charging protocol; The current charging information sent by the external device in response to the current charging information acquisition instruction is received.

19. The charging control method according to claim 14, characterized in that: The acquiring the current charging information of the external device according to the second charging protocol includes: When charging is performed using the second charging protocol, sending a current charging information acquisition instruction to the external device via the second pin according to the second charging protocol; The current charging information sent by the external device in response to the current charging information acquisition instruction is received.

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