Mode switching circuit and mobile charging equipment

Abstract

The invention discloses a mode switching circuit and mobile charging equipment. The mode switching circuit comprises a step-down conversion module, a switch module and an interface module, wherein the switch module is connected between the step-down conversion module and the interface module; the auxiliary power supply module is connected with the interface module; the control module is connected with the concentrator and is used for generating a mode switching signal and an enable signal according to user requirements; when the mode switching signal is a power mode, the enable signal is used for controlling the switch module to conduct and connect the step-down conversion module and the interface module, and the step-down conversion module transmits electric energy to the interface module; when the mode switching signal is a data mode, the enable signal is used for controlling the switch module to conduct and connect the concentrator and the interface module and controlling the auxiliary power supply module to supply power to the interface module, and data signal transmission is carried out between the concentrator and the interface module. According to the technical scheme provided by the invention, dual-mode switching of data and power is realized, the circuit structure is simple, and use by a user is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of battery interface circuits, and in particular to a mode switching circuit and a mobile charging device. Background Art

[0002] With the development of intelligence, users not only need to perform data transmission but also meet the charging power requirements of different devices, and the requirements for mobile terminals are getting higher and higher.

[0003] Existing technical solutions have the problem of lacking mode conversion ability. Most existing adapters only support the power output mode and cannot achieve data transmission. Existing technical solutions generally require replacing a dedicated data transmission device for data transmission, and the operation is cumbersome. Traditional power supply devices usually adopt independent modules to separately process the power output and data transmission functions, resulting in a complex internal circuit structure, increased production costs and space occupation, low resource utilization rate, and poor user experience.

[0004] Existing power adapters have a single function and a complex circuit structure for mode conversion, which affects the user experience. Summary of the Invention

[0005] The present invention provides a mode switching circuit and a mobile charging device to solve the problem that existing power adapters have a single function and cannot conveniently perform mode conversion.

[0006] According to one aspect of the present invention, a mode switching circuit is provided, including:

[0007] A buck conversion module, a switch module, and an interface module. The buck conversion module is used to connect to the battery pack of the mobile power supply, and the switch module is connected between the buck conversion module and the interface module;

[0008] An auxiliary power supply module, which is connected to the interface module;

[0009] A control module and a hub. The control module is connected to the hub. The control module is used to generate a mode switching signal and an enable signal according to user needs; the hub is connected to the switch module and the auxiliary power supply module;

[0010] When the mode switching signal is in the power mode, the enable signal is used to control the switch module to conduct and connect the buck conversion module and the interface module, and the buck conversion module is used to transmit electrical energy to the interface module;

[0011] When the mode switching signal is in the data mode, the control module is used to control the buck conversion module to turn off; the enable signal is used to control the switch module to conduct and connect the hub and the interface module, and control the auxiliary power supply module to supply power to the interface module. The hub is used to perform data signal transmission with the interface module.

[0012] Optionally, the interface module includes a first interface;

[0013] The switch module includes a first electronic switch;

[0014] The first end of the first electronic switch is connected to the first interface, the second end of the first electronic switch is connected to the first end of the hub, the third end of the first electronic switch is connected to the first communication end of the buck conversion module, and the control end of the first electronic switch is used to input an enable signal;

[0015] The first electronic switch is used to connect the first communication end of the buck conversion module to the third end of the first electronic switch according to the enable signal, and control the buck conversion module to output electric energy to the first interface; alternatively, the first electronic switch is used to connect the first end of the hub to the first interface according to the enable signal, and control the transmission of data signals between the hub and the first interface.

[0016] Optionally, when the mode switching signal is in the power mode, the enable signal is a first-level signal; the first electronic switch is used to disconnect the first end of the hub from the first interface according to the first-level signal, and connect the first communication end of the buck conversion module to the first interface according to the first-level signal, and control the buck conversion module to output electric energy to the first interface;

[0017] When the mode switching signal is in the data mode, the enable signal is a second-level signal; the first electronic switch is used to connect the first end of the hub to the first interface according to the second-level signal, and control the transmission of data signals between the hub and the first interface.

[0018] Optionally, the interface module further includes a second interface, and the types of the first interface and the second interface are different;

[0019] The switch module further includes a second electronic switch and a third electronic switch;

[0020] The first end of the second electronic switch is connected to the first end of the second interface, the second end of the second electronic switch is connected to the second end of the hub, the third end of the second electronic switch is connected to the second communication end of the buck conversion module, and the control end of the second electronic switch is used to input an enable signal; the second electronic switch is used to connect the second end of the hub to the first end of the second interface according to the enable signal;

[0021] The first end of the third electronic switch is connected to the second end of the second interface, the second end of the third electronic switch is connected to the third end of the hub, the third end of the third electronic switch is connected to the third communication end of the buck conversion module, and the control end of the third electronic switch is used to input an enable signal; the third electronic switch is used to connect the third end of the hub to the second end of the second interface according to the enable signal to transmit data signals.

[0022] Optionally, when the mode switching signal is in the power mode, the enabling signal is a first level signal; the second electronic switch is used to disconnect the second end of the hub from the second interface according to the first level signal, and conductively connect the second communication end of the buck conversion module to the second interface according to the first level signal, and disconnect the third end of the hub from the second interface according to the first level signal, and conductively connect the third communication end of the buck conversion module to the second interface according to the first level signal, and control the buck conversion module to output electric energy to the second interface;

[0023] When the mode switching signal is in the data mode, the enabling signal is a second level signal; the second electronic switch is used to conductively connect the second end of the hub to the second interface according to the second level signal, and the third electronic switch is used to conductively connect the third end of the hub to the second interface according to the second level signal, and control the transmission of data signals between the hub and the second interface.

[0024] Optionally, the mode switching circuit further includes: a multiplexing module;

[0025] The switch module further includes a third interface;

[0026] The multiplexing module is connected between the hub and the third interface, and the multiplexing module is used to conductively connect or disconnect the hub from the third interface according to the enabling signal;

[0027] When the mode switching signal is in the power mode, the enabling signal is a first level signal, and the multiplexing module is used to stop working according to the first level signal;

[0028] When the mode switching signal is in the data mode, the enabling signal is a second level signal, and the multiplexing module is used to work according to the second level signal to enable data transmission between the third interface and the hub.

[0029] Optionally, the mode switching circuit further includes:

[0030] A bidirectional voltage conversion module, which is used to connect the battery pack of the mobile power supply, and the bidirectional voltage conversion module is connected to the third interface and the hub; the bidirectional voltage conversion module is used to supply power to the third interface.

[0031] Optionally, the auxiliary power supply module includes:

[0032] A power supply, a synchronous buck converter and a power switch, the synchronous buck converter is connected between the power supply and the first end of the power switch, and the second end of the power switch is connected to the first interface and the second interface; the control end of the power switch is used to input an enabling signal, and the power switch is used to conduct or turn off according to the enabling signal;

[0033] When the mode switching signal is in the power mode, the enabling signal is a first level signal, and the power switch is used to disconnect according to the first level signal;

[0034] When the mode switching signal is in the data mode, the enabling signal is a second level signal, and the power switch is used to conduct according to the second level signal so that the synchronous buck converter supplies power to the first interface and the second interface;

[0035] Optionally, the auxiliary power supply module further includes: a buck unit connected to the synchronous buck converter, and the buck unit is used to step down the first voltage output by the synchronous buck converter to a second voltage and a third voltage; a hub and a multiplexing module are connected to the buck unit, and the buck unit is used to supply the second voltage to the multiplexing module and supply the third voltage to the hub.

[0036] Optionally, the mode switching circuit further includes:

[0037] a display module connected to the control module, and the display module is used to display a first interface according to the control signal of the control module when the mode switching signal is in the data mode; and display a second interface when the mode switching signal is in the power mode.

[0038] According to another aspect of the present invention, this embodiment provides a mobile charging device including the mode switching circuit provided in the first aspect.

[0039] The technical solution of the embodiment of the present invention realizes the switching between the data mode and the power mode. The buck conversion module is controlled by the control module to be turned off in the data mode, and the auxiliary power supply module is controlled by the hub to supply power to the hub and the interface module. The switch module provided in this embodiment can, according to the enabling signal, in the data mode, perform interactive transmission of data signals between the interface module and the hub; in the power mode, conduct the interface module and the buck conversion module, so that the buck conversion module outputs electric energy to the interface module. The technical solution provided in this embodiment solves the problem that the existing power adapter has a single function and cannot conveniently perform mode conversion, realizes the switching between the data mode and the power mode, shares the hub as a data channel for data or power control, has a simple circuit structure, and improves the convenience of user use.

[0040] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present invention, nor is it used to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. Description of the Drawings

[0041] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0042] Figure 1 FIG. is a schematic structural diagram of a mode switching circuit provided according to an embodiment of the present invention;

[0043] Figure 2 FIG. is a schematic structural diagram of another mode switching circuit provided according to an embodiment of the present invention;

[0044] Figure 3 FIG. is a schematic structural diagram of yet another mode switching circuit provided according to an embodiment of the present invention;

[0045] Figure 4 FIG. is a schematic structural diagram of yet another mode switching circuit provided according to an embodiment of the present invention;

[0046] Figure 5 FIG. is a schematic diagram of the first interface in the power mode of a mode switching circuit provided according to an embodiment of the present invention;

[0047] Figure 6 FIG. is a schematic diagram of the second interface in the data mode of a mode switching circuit provided according to an embodiment of the present invention. Detailed Embodiments

[0048] To enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, rather than all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments of the present invention shall fall within the scope of protection of the present invention.

[0049] It should be noted that the terms "first", "second", etc. in the description, claims and above-mentioned drawings of the present invention are used to distinguish similar objects, and do not necessarily need to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present invention described here can be implemented in an order other than those illustrated or described here. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0050] Figure 1 is a schematic structural diagram of a mode switching circuit provided according to an embodiment of the present invention. Refer to Figure 1 As shown in the figure, the mode switching circuit 100 provided in this embodiment includes: a buck conversion module 1, a switch module 2, and an interface module 3. The buck conversion module 1 is used to connect to the battery pack of the mobile power supply. The switch module 2 is connected between the buck conversion module 1 and the interface module 3; an auxiliary power supply module 4, and the auxiliary power supply module 4 is connected to the interface module 3; a control module 5 and a hub 6, the control module 5 is connected to the hub 6, and the control module 5 is used to generate a mode switching signal and an enable signal HUB_EN according to user needs; the hub 6 is connected to the switch module 2 and the auxiliary power supply module 4; when the mode switching signal is in the power mode, the enable signal HUB_EN is used to control the switch module 2 to conductively connect the buck conversion module 1 and the interface module 3, and the buck conversion module 1 is used to transmit electrical energy to the interface module 3; when the mode switching signal is in the data mode, the control module 5 is used to control the buck conversion module 1 to turn off; the enable signal HUB_EN is used to control the switch module 2 to conductively connect the hub 6 and the interface module 3, and control the auxiliary power supply module 4 to supply power to the interface module 3, and the hub 6 is used to transmit data signals between the hub 6 and the interface module 3.

[0051] Specifically, the battery pack of the mobile power supply can output a DC voltage. The buck conversion module is used to connect to the battery pack of the mobile power supply. When the user demand is in the power mode, the buck conversion module can step down and output electrical energy to the interface module 3. The buck conversion module can also communicate with the control module 5. When the user demand is in the data mode, the control module 5 can control the buck conversion module to turn off.

[0052] The hub 6, also known as a Hub, mainly functions to connect multiple devices in a network to form a network segment, enabling all devices to communicate directly with each other on this network segment. The hub 6 operates at the physical layer of the OSI model. It regenerates, reshapes, and amplifies the received signals to extend the transmission distance of the network and centralizes all nodes around it. The hub 6 is commonly used in local area networks (LANs).

[0053] The control module 5 generates a mode switching signal and an enable signal HUB_EN according to user needs. The mode switching signal includes a power mode and a data mode.

[0054] When the mode switching signal is in the power mode, the enable signal HUB_EN controls the switch module 2 to conductively connect the buck conversion module to the interface module 3, and the buck conversion module transmits electrical energy to the interface module 3 for power output.

[0055] When the mode switching signal is in the data mode, the control module 5 controls the buck conversion module to turn off. The enable signal HUB_EN controls the switch module 2 to conductively connect the hub 6 to the interface module 3, and data signal transmission occurs between the hub 6 and the interface module 3 to achieve data interaction. The interface module 3 can interact with the hub 6. When there are at least two interface modules 3, data interaction can also occur between different interface modules 3.

[0056] When the mode switching signal is in the data mode, the control module 5 controls the buck conversion module to turn off. The enable signal HUB_EN controls the auxiliary power supply module 4 to supply power to the interface module 3 to ensure the smooth realization of data interaction.

[0057] The mode switching circuit provided in this embodiment realizes the switching between the data mode and the power mode. The control module 5 controls the buck conversion module to turn off in the data mode, and the auxiliary power supply module 4 is controlled by the hub 6 to supply power to the hub 6 and the interface module 3. The switch module 2 provided in this embodiment can, according to the enable signal HUB_EN, in the data mode, perform data signal interaction transmission between the interface module 3 and the hub 6; in the power mode, conductively connect the interface module 3 to the buck conversion module, enabling the buck conversion module to output electrical energy to the interface module 3. The technical solution provided in this embodiment solves the problem that existing power adapters have a single function and cannot conveniently perform mode conversion, realizes the switching between the data mode and the power mode, shares the hub 6 as a data channel for data or power control, has a simple circuit structure, and improves the convenience of user use.

[0058] Optionally, Figure 2 is a schematic structural diagram of another mode switching circuit provided according to an embodiment of the present invention. On the basis of the above embodiment, refer to Figure 2, the interface module 3 includes a first interface A1; the switch module 2 includes a first electronic switch 21; the first end of the first electronic switch 21 is connected to the first interface A1, the second end of the first electronic switch 21 is connected to the first end of the hub 6, the third end of the first electronic switch 21 is connected to the first communication end of the buck conversion module, and the control end of the first electronic switch 21 is used to input an enable signal HUB_EN; the first electronic switch 21 is used to conductively connect the first communication end of the buck conversion module to the third end of the first electronic switch 21 according to the enable signal HUB_EN, and control the buck conversion module 1 to output electric energy to the first interface A1; alternatively, the first electronic switch 21 is used to conductively connect the first end of the hub 6 to the first interface A1 according to the enable signal HUB_EN, and control the transmission of data signals between the hub 6 and the first interface A1.

[0059] Specifically, the first interface A1 may include a USB-A interface. The first end of the first electronic switch 21 is connected to the D+ / D- pins of the first interface A1, which is mainly used for data transmission and works in a differential signal mode. D+ and D- are the core parts of USB signal transmission, and data is represented by the voltage difference between them. This differential signal technology improves the noise immunity and data integrity of data transmission. The second end of the first electronic switch 21 is connected to the D+ / D- pins of the hub 6 for data transmission. The third end of the first electronic switch 21 is connected to the D+ / D- pins of the buck conversion module for protocol communication.

[0060] Optionally, based on the above embodiments, continue to refer to Figure 2 , when the mode switching signal is the power mode, the enable signal HUB_EN is a first level signal; the first electronic switch 21 is used to control the disconnection of the first end of the hub 6 from the first interface A1 according to the first level signal, and conductively connect the first communication end of the buck conversion module to the first interface A1 according to the first level signal, and control the buck conversion module to output electric energy to the first interface A1.

[0061] When the mode switching signal is the data mode, the enable signal HUB_EN is a second level signal; the first electronic switch 21 is used to conductively connect the first end of the hub 6 to the first interface A1 according to the second level signal, and control the transmission of data signals between the hub 6 and the first interface A1.

[0062] Specifically, the first level signal may be a low level signal. In the power mode, the enable signal HUB_EN is a low level signal, and the first electronic switch 21 is used to control the disconnection of the first end of the hub 6 from the first interface A1 according to the low level signal, and conductively connect the first communication end of the buck conversion module to the first interface A1 according to the low level signal, and control the buck conversion module to output electric energy to the first interface A1. Refer to Figure 2, A1_VBUS refers to the path through which the buck conversion module outputs electrical energy to the first interface A1.

[0063] In the data mode, the enable signal HUB_EN is a second-level signal, such as a high-level signal. Exemplarily, the first electronic switch 21 connects the first end of the hub 6 to the first interface A1 according to the high-level signal, controlling the transmission of data signals between the hub 6 and the first interface A1. Figure 2 Data in it represents data signals.

[0064] Optionally, based on the above embodiments, continue to refer to Figure 2 , the interface module 3 further includes a second interface C2, and the types of the first interface A1 and the second interface C2 are different; the switch module 2 further includes a second electronic switch 22 and a third electronic switch 23; the first end of the second electronic switch 22 is connected to the first end of the second interface C2, the second end of the second electronic switch 22 is connected to the second end of the hub 6, the third end of the second electronic switch 22 is connected to the second communication end of the buck conversion module, and the control end of the second electronic switch 22 is used to input the enable signal HUB_EN; the second electronic switch 22 is used to connect the second end of the hub 6 to the first end of the second interface C2 according to the enable signal HUB_EN; the first end of the third electronic switch 23 is connected to the second end of the second interface C2, the second end of the third electronic switch 23 is connected to the third end of the hub 6, the third end of the third electronic switch 23 is connected to the third communication end of the buck conversion module, and the control end of the third electronic switch 23 is used to input the enable signal HUB_EN; the third electronic switch 23 is used to connect the third end of the hub 6 to the second end of the second interface C2 according to the enable signal HUB_EN to transmit data signals.

[0065] Specifically, the second interface C2 may include a USB-C interface. Figure 2 HUB_EN in it refers to the enable signal HUB_EN. The first end of the second electronic switch 22 is connected to the D+ / D- pins of the second interface C2, mainly for data transmission and working in a differential signal mode. D+ and D- are the core parts of USB signal transmission. The second end of the second electronic switch 22 is connected to the D+ / D- pins of the hub 6 for data transmission. The third end of the second electronic switch 22 is connected to the D+ / D- pins of the buck conversion module for protocol communication.

[0066] The main functions of the CC1 and CC2 pins of the second interface C2 include plug detection, cable direction identification, negotiation to establish DFP and UFP identities, discovery and configuration of VBUS, current mode or PD mode, configuration of VCONN, and discovery and configuration of other peripheral modes.

[0067] Optionally, based on the above embodiments, continue to refer toFigure 2 When the mode switching signal is in the power mode, the enable signal HUB_EN is a first level signal; the second electronic switch 22 is used to control the disconnection of the second end of the hub 6 from the second interface C2 according to the first level signal, and to connect the second communication end of the buck conversion module to the second interface C2 according to the first level signal, and to control the disconnection of the third end of the hub 6 from the second interface C2 according to the first level signal, and to connect the third communication end of the buck conversion module to the second interface C2 according to the first level signal, so as to control the buck conversion module to output electric energy to the second interface C2.

[0068] When the mode switching signal is in the data mode, the enable signal HUB_EN is a second level signal; the second electronic switch 22 is used to connect the second end of the hub 6 to the second interface C2 according to the second level signal, and the third electronic switch 23 is used to connect the third end of the hub 6 to the second interface C2 according to the second level signal, so as to control the transmission of data signals between the hub 6 and the second interface C2.

[0069] Specifically, in the power mode, the first level signal is a low level signal, and the second electronic switch 22 controls the disconnection of the second end of the hub 6 from the second interface C2 according to the low level signal. The second electronic switch 22 connects the second communication end of the buck conversion module to the second interface C2 according to the low level signal of the enable signal HUB_EN, and controls the disconnection of the third end of the hub 6 from the second interface C2 according to the low level signal of the enable signal HUB_EN. The second electronic switch 22 connects the third communication end of the buck conversion module to the second interface C2 according to the low level signal of the enable signal HUB_EN, and further controls the buck conversion module to output electric energy to the second interface C2, so as to achieve power output.

[0070] In the data mode, the enable signal HUB_EN is a second level signal, for example, a high level signal. The second electronic switch 22 connects the second end of the hub 6 to the second interface C2 according to the high level signal of the enable signal HUB_EN. The third electronic switch 23 connects the third end of the hub 6 to the second interface C2 according to the high level signal of the enable signal HUB_EN, and further controls the transmission of data signals between the hub 6 and the second interface C2, so as to achieve the interaction of data signals.

[0071] With such a setting, the switching between the data mode and the power mode is realized, which can not only perform data transmission according to the user's needs, but also perform power output according to the user's needs, meeting the different needs of users.

[0072] Optionally, Figure 3 is a schematic structural diagram of another mode switching circuit provided according to an embodiment of the present invention. On the basis of the above embodiments, see Figure 3, the mode switching circuit may further include: a multiplexing module 7; the switch module 2 further includes a third interface C1; the multiplexing module 7 is connected between the hub 6 and the third interface C1, and the control end of the multiplexing module 7 is used to input an enable signal HUB_EN. The multiplexing module 7 is used to conduct or close the connection between the hub 6 and the third interface C1 according to the enable signal HUB_EN; when the mode switching signal is in the power mode, the enable signal HUB_EN is a first-level signal, and the multiplexing module 7 is used to stop working according to the first-level signal; when the mode switching signal is in the data mode, the enable signal HUB_EN is a second-level signal, and the multiplexing module 7 is used to work according to the second-level signal to enable data transmission between the third interface C1 and the hub 6.

[0073] Specifically, the main functions of the multiplexing module 7 (MUX) include signal integration, signal switching, resource saving, and increasing channel capacity. Signal integration means that the multiplexer can receive multiple input signals simultaneously and combine them into one output signal to achieve centralized transmission and processing of signals. Signal switching means that the multiplexer can select different input channels according to the input of the control signal for signal switching, realizing random selection and fast switching of different signals. Resource saving means that by using the multiplexer, the number of transmission lines and devices required in the system can be reduced, thus saving resources and reducing costs. Increasing channel capacity means that the multiplexer can combine multiple low-speed signals into one high-speed signal for transmission, improving transmission efficiency and increasing channel capacity. Exemplarily, the multiplexing module 7 can adopt a functional chip with the model number PS8822. The third interface C1 can be a USB-C interface.

[0074] In the power mode, the enable signal HUB_EN is a first-level signal, exemplarily, a low-level signal. The multiplexing module 7 stops working according to the low-level signal of the enable signal HUB_EN, and the multiplexer is closed.

[0075] In the data mode, the enable signal HUB_EN is a second-level signal, exemplarily, a high-level signal. The multiplexing module 7 is used to work according to the high-level signal to enable data transmission between the third interface C1 and the hub 6. Data is transmitted between the hub 6 and the multiplexing module 7 through I 2 C. Data signals Data are transmitted between the multiplexer module and the third interface C1. The CC1 / CC2 pins of the hub 6 and the third interface C1 are connected. The main functions of the CC1 / CC2 pins of the third interface C1 include plug detection, cable direction identification, negotiation to establish DFP and UFP identities, discovery and configuration of VBUS, current mode or PD mode, configuration of VCONN, and discovery and configuration of other peripheral modes, etc.

[0076] Optionally, based on the above embodiments, continue to refer toFigure 3 , the mode switching circuit may further include: a bidirectional voltage conversion module 8, which is used to connect the battery pack of the mobile power supply. The bidirectional voltage conversion module 8 is connected to the third interface C1 and the hub 6; the bidirectional voltage conversion module 8 is used to supply power to the third interface C1.

[0077] Specifically, the bidirectional voltage conversion module 8 may adopt a power chip with the model SC8815. The bidirectional voltage conversion module 8 is used to connect the battery pack of the mobile power supply. The bidirectional voltage conversion module 8 can automatically adapt to the change of the input voltage, achieve efficient conversion, adopt synchronous rectification technology, reduce power loss, and improve conversion efficiency. The bidirectional voltage conversion module 8 integrates an I 2 C interface, which is convenient to achieve high programmability and flexibility. The bidirectional voltage conversion module 8 also has a bidirectional charge and discharge function.

[0078] In the power mode, the multiplexer is turned off according to the low-level signal of the enable signal HUB_EN. In the power mode, the bidirectional voltage conversion module 8 is turned on according to the high-level signal of the enable signal HUB_EN to supply power to the third interface C1, realizing power transmission to the third interface C1. Figure 3 In C1-VBUS in, it is the power transmission path for the bidirectional voltage conversion module 8 to transmit electrical energy to the third interface C1.

[0079] In the data mode, the bidirectional voltage conversion module 8 is turned off according to the first control signal. The first control signal may be a control signal transmitted through the I / O port of the control module 5 between the bidirectional voltage conversion module 8 and the hub 6 through the I 2 C protocol. The multiplexing module 7 starts to work according to the high-level signal of the enable signal HUB_EN, enabling the transmission of data signals between the third interface C1 and the hub 6.

[0080] Optionally, Figure 4 is a schematic structural diagram of another mode switching circuit provided according to an embodiment of the present invention. On the basis of the above embodiments, refer to Figure 4 , the auxiliary power supply module 4 includes: a power supply 41, a synchronous buck converter 42, and a power switch 43. The synchronous buck converter 42 is connected between the power supply 41 and the first end of the power switch 43. The second end of the power switch 43 is connected to the first interface A1 and the second interface C2; the control end of the power switch 43 is used to input the enable signal HUB_EN, and the power switch 43 is used to conduct or turn off according to the enable signal HUB_EN.

[0081] When the mode switching signal is in the power mode, the enable signal HUB_EN is a first-level signal, and the power switch 43 is used to disconnect according to the first-level signal; when the mode switching signal is in the data mode, the enable signal HUB_EN is a second-level signal, and the power switch 43 is used to conduct according to the second-level signal, so that the synchronous buck converter 42 supplies power to the first interface A1 and the second interface C2.

[0082] Specifically, the power supply 41 can be an auxiliary battery, such as a battery or a power chip that outputs 5V DC. The synchronous buck converter 42 can use a power chip with the model SC8112. The synchronous buck converter 42 can have a wide voltage input range from 4.6V to 36V. The synchronous buck converter 42 provides two independent output channels, and the maximum output current of each channel is 6A. The control end of the power switch 43 is used to input the enable signal HUB_EN.

[0083] In the power mode, the enable signal HUB_EN is a first-level signal, and the power switch 43 disconnects according to the first-level signal. The first interface A1 and the second interface C2 are powered by the buck conversion module.

[0084] In the data mode, the buck conversion module is turned off. The enable signal HUB_EN is a second-level signal, and the power switch 43 conducts according to the second-level signal. The synchronous buck converter 42 supplies power to the first interface A1 and the second interface C2 through the conducting power switch 43, so that the first interface A1 and the second interface C2 are powered on, facilitating data interaction.

[0085] Optionally, based on the above embodiments, continue to refer to Figure 4 , the auxiliary power supply module 4 further includes: a buck unit (not shown in the figure), the buck unit is connected to the synchronous buck converter 42, and the buck unit is used to step down the first voltage output by the synchronous buck converter 42 to a second voltage and a third voltage; the hub 6 and the multiplexing module 7 are connected to the buck unit, and the buck unit is used to provide the second voltage to the multiplexing module 7 and provide the third voltage to the hub 6.

[0086] Specifically, the buck unit can be a post-stage buck circuit of the synchronous buck converter 42. Exemplarily, the first voltage output by the synchronous buck converter 42 is, for example, 5V. The buck unit steps down the first voltage to obtain a second voltage and a third voltage. Exemplarily, the second voltage can be 3.3V and the third voltage can be 1.2V. The second voltage is used to drive the multiplexing module 7 to power on in the data mode. The third voltage can drive the hub 6 to power on in the data mode. Such a setting provides the power-on working conditions for the hub 6 and the multiplexing module 7 to perform data interaction.

[0087] Optionally, Figure 5It is a schematic diagram of the first interface in the power mode of a mode switching circuit provided according to an embodiment of the present invention. Figure 6 It is a schematic diagram of the second interface in the data mode of a mode switching circuit provided according to an embodiment of the present invention. On the basis of the above embodiments, in combination with Figures 4 to 6 , the mode switching circuit further includes: a display module (not shown in the figure), the display module is connected to the control module 5, and the display module is used to display the first interface according to the control signal of the control module 5 when the mode switching signal is in the data mode; and display the second interface when the mode switching signal is in the power mode.

[0088] Specifically, the mode switching circuit further includes an input module (not shown in the figure). The input module is connected to the control module 5. The input module may include a button, a touch screen, a touch key, etc. The input module is used to input the needs of the user. Refer to Figure 5 , Figure 5 Exemplarily shows a schematic diagram of the first interface in the power mode. Figure 5 As can be seen on the left in Figure 6 , Figure 6 Exemplarily shows a schematic diagram of the second interface in the data mode. Figure 6 As can be seen on the left in

[0089] It should be noted that Figure 5 and Figure 6 Exemplarily shows a red display interface, and the display interface can be displayed in green, blue, yellow or other colors, etc., and no limitation is made here.

[0090] An alternative implementation, the display interface of the display module can also display time, Figure 5 and Figure 6 The "TIME" in

[0091] Figure 5 and Figure 6 represents time, and 8:20 is only an example and no limitation is made. The time can be updated and displayed in real time. Figure 5 and Figure 6 The "100%" in

[0092] can represent the capacity in the power mode, or the progress of data transmission in the data mode, etc., and no limitation is made here. Figure 5 and Figure 6 The "INPUT 100W" in

[0092] means the input power is 100W. The "OUTPUT 250W" means the output power is 250W. The "USB-C 20V" means the voltage level of the second interface C2 is 20V. The "TEMP 83°F" represents the temperature of 83 degrees Fahrenheit, which is equivalent to 28 degrees Celsius.

[0092] This embodiment provides a mobile charging device. The mobile charging device provided in this embodiment includes the mode switching circuit provided in any of the above embodiments, and has the beneficial effects of the mode switching circuit provided in any of the above embodiments, which will not be elaborated here.

[0093] It should be understood that various forms of the processes shown above can be used, steps can be reordered, added or deleted. For example, the steps described in the present invention can be executed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of the present invention can be achieved, and no limitation is made herein.

[0094] The above specific embodiments do not constitute a limitation on the protection scope of the present invention. Those skilled in the art should understand that various modifications, combinations, sub - combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A mode switching circuit, characterized in that: include: A step-down conversion module, a switch module and an interface module, wherein the step-down conversion module is used to connect to a battery pack of a mobile power source, and the switch module is connected between the step-down conversion module and the interface module; An auxiliary power supply module, the auxiliary power supply module is connected to the interface module; A control module and a hub, wherein the control module is connected to the hub, and the control module is used to generate a mode switching signal and an enable signal according to user needs; the hub is connected to the switch module and the auxiliary power supply module; When the mode switching signal is the power mode, the enable signal is used to control the switch module to conduct the buck conversion module with the interface module, and the buck conversion module is used to transmit electric energy to the interface module; When the mode switching signal is in data mode, the control module is used to control the step-down conversion module to shut down; the enable signal is used to control the switch module to connect the hub and the interface module, and control the auxiliary power supply module to supply power to the interface module, and the hub is used to transmit data signals to the interface module.

2. The mode switching circuit according to claim 1, characterized in that: The interface module includes a first interface; The switch module includes a first electronic switch; The first end of the first electronic switch is connected to the first interface, the second end of the first electronic switch is connected to the first end of the hub, the third end of the first electronic switch is connected to the first communication end of the buck conversion module, and the control end of the first electronic switch is used to input an enable signal; The first electronic switch is used to connect the first communication end of the buck conversion module with the third end of the first electronic switch according to the enable signal, thereby controlling the buck conversion module to output electric energy to the first interface; or, the first electronic switch is used to connect the first end of the hub with the first interface according to the enable signal, thereby controlling the transmission of data signals between the hub and the first interface.

3. The mode switching circuit according to claim 2, characterized in that: When the mode switching signal is the power mode, the enable signal is a first level signal; the first electronic switch is used to control the first end of the hub to be disconnected from the first interface according to the first level signal, and to connect the first communication end of the buck conversion module to the first interface according to the first level signal, so as to control the buck conversion module to output electric energy to the first interface; When the mode switching signal is a data mode, the enable signal is a second level signal; the first electronic switch is used to connect the first end of the hub to the first interface according to the second level signal, and control the transmission of data signals between the hub and the first interface.

4. The mode switching circuit according to claim 2, characterized in that: The interface module further includes a second interface, and the type of the first interface is different from the type of the second interface; The switch module also includes a second electronic switch and a third electronic switch; The first end of the second electronic switch is connected to the first end of the second interface, the second end of the second electronic switch is connected to the second end of the hub, the third end of the second electronic switch is connected to the second communication end of the buck conversion module, and the control end of the second electronic switch is used to input an enable signal; the second electronic switch is used to conduct the second end of the hub to the first end of the second interface according to the enable signal; The first end of the third electronic switch is connected to the second end of the second interface, the second end of the third electronic switch is connected to the third end of the hub, the third end of the third electronic switch is connected to the third communication end of the buck conversion module, and the control end of the third electronic switch is used to input an enable signal; the third electronic switch is used to conduct and connect the third end of the hub to the second end of the second interface according to the enable signal to transmit a data signal.

5. The mode switching circuit according to claim 4, characterized in that: When the mode switching signal is the power mode, the enable signal is a first level signal; the second electronic switch is used to control the second end of the hub to be disconnected from the second interface according to the first level signal, and to connect the second communication end of the buck conversion module to the second interface according to the first level signal, and to control the third end of the hub to be disconnected from the second interface according to the first level signal, and to connect the third communication end of the buck conversion module to the second interface according to the first level signal, so as to control the buck conversion module to output electric energy to the second interface; When the mode switching signal is a data mode, the enable signal is a second level signal; the second electronic switch is used to connect the second end of the hub to the second interface according to the second level signal, and the third electronic switch is used to connect the third end of the hub to the second interface according to the second level signal, so as to control the transmission of data signals between the hub and the second interface.

6. The mode switching circuit according to claim 5, characterized in that: The mode switching circuit further includes: a multiplexing module; The switch module also includes a third interface; The multiplexing module is connected between the hub and the third interface, and the multiplexing module is used to turn on or off the hub and the third interface according to the enable signal; When the mode switching signal is a power mode, the enable signal is a first level signal, and the multiplexing module is used to stop working according to the first level signal; When the mode switching signal is in data mode, the enable signal is a second level signal, and the multiplexing module is used to operate according to the second level signal to enable data to be transmitted between the third interface and the hub.

7. The mode switching circuit according to claim 6, characterized in that: The mode switching circuit further includes: A bidirectional voltage conversion module, the bidirectional voltage conversion module is used to connect the battery pack of the mobile power supply, the bidirectional voltage conversion module is connected to the third interface and the hub; the bidirectional voltage conversion module is used to supply power to the third interface.

8. The mode switching circuit according to claim 6, characterized in that: The auxiliary power supply module comprises: A power supply, a synchronous buck converter and a power switch, wherein the synchronous buck converter is connected between the power supply and a first end of the power switch, and a second end of the power switch is connected to the first interface and the second interface; a control end of the power switch is used to input an enable signal, and the power switch is used to be turned on or off according to the enable signal; When the mode switching signal is a power mode, the enable signal is a first level signal, and the power switch is used to be disconnected according to the first level signal; When the mode switching signal is in the data mode, the enable signal is a second level signal, and the power switch is used to be turned on according to the second level signal, so that the synchronous buck converter supplies power to the first interface and the second interface; The auxiliary power supply module also includes: a step-down unit, which is connected to the synchronous step-down converter, and is used to step down the first voltage output by the synchronous step-down converter into a second voltage and a third voltage; the hub and the multiplexing module are connected to the step-down unit, and the step-down unit is used to provide the second voltage to the multiplexing module and provide the third voltage to the hub.

9. The mode switching circuit according to claim 8, characterized in that: The mode switching circuit further includes: A display module is connected to the control module, and is used to display a first interface when the mode switching signal is a data mode according to a control signal of the control module; and to display a second interface when the mode switching signal is a power mode.

10. A mobile charging device, characterized in that: include: The mode switching circuit according to any one of claims 1 to 9.

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