Circuit supporting multi-path charging and multi-path peripheral equipment and electronic equipment

Abstract

The invention relates to the technical field of electronic circuits, in particular to a circuit supporting multi-path charging and multi-path peripheral equipment and electronic equipment. The circuit comprises a first interface unit, a second interface unit, a third interface unit, a first overcurrent protection chip, a second overcurrent protection chip, a third overcurrent protection chip, a first bidirectional power switch, a second bidirectional power switch, a third bidirectional power switch, a boost chip, an overvoltage protection chip and a power management chip. The first bidirectional power switch, the second bidirectional power switch and the third bidirectional power switch are respectively used for adjusting own on-off states according to the charging and discharging states of the first interface unit, the second interface unit and the third interface unit; and the power management chip is used for controlling the energy storage battery to charge or discharge according to the working state of each interface unit, so that a plurality of external devices can be connected at the same time, and the switching between charging and discharging can be realized according to the requirements so as to meet the requirements of different scenes.

Description

Technical Field

[0001] This application relates to the field of electronic circuit technologies, and in particular, to a circuit and an electronic device supporting multiple-channel charging and multiple-channel peripherals. Background Art

[0002] In the related art, the functions of common terminal devices are relatively single and cannot meet the requirements in some complex scenarios. Moreover, the types of peripheral interfaces on the terminal devices are relatively single and the number of peripheral interfaces is small, which cannot meet the expansion of some peripheral devices. For example, some terminal devices need to connect an input device and at the same time need to connect an electronic device to supply power to the electronic device. Even in some application scenarios, it is also necessary to connect a power adapter or a power supply device at the same time to charge the terminal device. However, the terminal devices in the related art usually only have one of the functions of discharging or charging and cannot meet the requirements of some scenarios. Summary of the Invention

[0003] This application provides a circuit and an electronic device supporting multiple-channel charging and multiple-channel peripherals to solve the technical problem that the peripheral interfaces of terminal devices in the related art are single and cannot meet the requirements of complex scenarios.

[0004] In a first aspect, this application provides a circuit supporting multiple-channel charging and multiple-channel peripherals, including: a first interface unit, a second interface unit, a third interface unit, a first overcurrent protection chip, a second overcurrent protection chip, a third overcurrent protection chip, a first bidirectional power switch, a second bidirectional power switch, a third bidirectional power switch, a boost chip, an overvoltage protection chip, and a power management chip;

[0005] The first interface unit is electrically connected to the first bidirectional power switch and the first overcurrent protection chip respectively. The first bidirectional power switch is electrically connected to the overvoltage protection chip, the second bidirectional power switch, and the third bidirectional power switch respectively. The overvoltage protection chip is electrically connected to the power management chip. The second interface unit is electrically connected to the second bidirectional power switch and the second overcurrent protection chip respectively. The third overcurrent protection chip is electrically connected to the first overcurrent protection chip, the boost chip, the second overcurrent protection chip, and the first interface unit respectively;

[0006] The enable terminals of the first overcurrent protection chip, the second overcurrent protection chip, the third overcurrent protection chip, and the boost chip are all electrically connected to the power management chip. The power management chip is configured to output corresponding enable signals to control the corresponding chips to work;

[0007] The first interface unit, the second interface unit, and the third interface unit are all used to connect to external devices; the first bidirectional power switch, the second bidirectional power switch, and the third bidirectional power switch are respectively used to adjust their own switch states according to the charge and discharge states of the first interface unit, the second interface unit, and the third interface unit.

[0008] The power management chip is also used to connect to the energy storage battery and control the charging or discharging of the energy storage battery according to the working states of the first interface unit, the second interface unit, and the third interface unit.

[0009] In a possible design, any one of the first interface unit, the second interface unit, and the third interface unit is used to connect to an external charging device to charge the energy storage battery.

[0010] The priorities of the first interface unit, the second interface unit, and the third interface unit for charging the energy storage battery are: the priority of the first interface unit is higher than that of the second interface unit, and the priority of the second interface unit is higher than that of the third interface unit.

[0011] In a possible design, when the first interface unit is in the state of charging the energy storage battery, the first bidirectional power switch is in the on state; at the same time, the first bidirectional power switch is used to generate a first interrupt signal and send the first interrupt signal to the second bidirectional power switch and the third bidirectional power switch respectively.

[0012] The second bidirectional power switch and the third bidirectional power switch are both used to switch from the on state to the off state under the control of the first interrupt signal.

[0013] In a possible design, when the second interface unit is in the state of charging the energy storage battery, the second bidirectional power switch is in the on state; at the same time, the second bidirectional power switch is used to generate a second interrupt signal and send the second interrupt signal to the first bidirectional power switch and the third bidirectional power switch; the first bidirectional power switch and the third bidirectional power switch are both used to switch from the on state to the off state under the control of the second interrupt signal.

[0014] When the third interface unit is in the state of charging the energy storage battery, the third bidirectional power switch is in the on state; at the same time, the third bidirectional power switch is used to generate a third interrupt signal and send the third interrupt signal to the first bidirectional power switch and the third bidirectional power switch; the first bidirectional power switch and the third bidirectional power switch are used to switch from the on state to the off state under the control of the third interrupt signal.

[0015] In a possible design, it further includes a charging detection circuit. The input end of the charging detection circuit is electrically connected to the output ends of the second bidirectional power switch and the third bidirectional power switch respectively, and the output end of the charging detection circuit is electrically connected to the power management chip;

[0016] The charging detection circuit is used to detect a first voltage at the output ends of the second bidirectional power switch and the third bidirectional power switch, and determine whether it is in a state of charging the energy storage battery according to the first voltage. If so, a first detection signal is generated;

[0017] The power management chip is further used to control the first bidirectional power switch to switch to the off state according to the first detection signal.

[0018] In a possible design, the charging detection circuit includes a transistor and a first resistor. The control electrode of the transistor is electrically connected to the output ends of the second bidirectional power switch and the third bidirectional power switch respectively. The first electrode of the transistor is grounded, and the second electrode of the transistor is electrically connected to the power management chip.

[0019] In a possible design, when it is detected that a load device is connected to the first interface unit, and there is no load connected to the second interface unit and the third interface unit, the power management chip controls the energy storage battery and the overvoltage protection chip to work, and at the same time controls the first bidirectional power switch to be in the on state to supply power to the load device on the first interface unit;

[0020] When it is detected that a load device is connected to the second interface unit, the power management chip controls the energy storage battery, the boost chip and the second overcurrent protection core to work to supply power to the load device on the second interface unit;

[0021] When it is detected that a load device is connected to the third interface unit, the power management chip controls the energy storage battery, the boost chip and the third overcurrent protection core to work to supply power to the load device on the third interface unit.

[0022] In a possible design, when a load device is connected to the first interface unit and a charging device is connected to the second interface unit, the second bidirectional power switch conducts to charge the energy storage battery through the overvoltage protection chip and the power management chip; the power management chip is used to control the first bidirectional power switch to turn off, and at the same time control the energy storage battery, the boost chip and the first overcurrent protection chip to work to supply power to the load device on the first interface unit;

[0023] Alternatively, when a load device is connected to the first interface unit and a charging device is connected to the third interface unit, the third bidirectional power switch is turned on to charge the energy storage battery through the overvoltage protection chip and the power management chip; the power management chip is configured to turn off the first bidirectional power switch and simultaneously control the operation of the energy storage battery, the boost chip, and the first overcurrent protection chip to supply power to the load device on the first interface unit;

[0024] Alternatively, when a charging device is connected to the second interface unit and load devices are connected to the first interface unit and the third interface unit, the second bidirectional power switch is turned on to charge the energy storage battery through the overvoltage protection chip and the power management chip; the power management chip is configured to turn off the first bidirectional power switch and the third bidirectional power switch and simultaneously control the operation of the energy storage battery, the boost chip, the first overcurrent protection chip, and the third overcurrent protection chip to supply power to the load devices on the first interface unit and the third interface unit;

[0025] Alternatively, when a charging device is connected to the third interface unit and load devices are connected to the first interface unit and the second interface unit, the third bidirectional power switch is turned on to charge the energy storage battery through the overvoltage protection chip and the power management chip; the power management chip is configured to turn off the first bidirectional power switch and the second bidirectional power switch and simultaneously control the operation of the energy storage battery, the boost chip, the first overcurrent protection chip, and the second overcurrent protection chip to supply power to the load devices on the first interface unit and the second interface unit.

[0026] In a possible design, both the second interface unit and the third interface unit include a plurality of different device interfaces for connecting load devices and / or charging devices;

[0027] When a charging device and a load device are simultaneously connected to different device interfaces in the second interface unit, the second bidirectional power switch is turned on. Meanwhile, the power management chip is configured to control the operation of the energy storage battery, the boost chip, and the second overcurrent protection chip to supply power to the load device on the second interface unit;

[0028] Alternatively, when a charging device and a load device are simultaneously connected to different device interfaces in the third interface unit, the third bidirectional power switch is turned on. Meanwhile, the power management chip is configured to control the operation of the energy storage battery, the boost chip, and the third overcurrent protection chip to supply power to the load device on the third interface unit.

[0029] In a second aspect, the present application provides an electronic device, including a circuit for supporting multi-channel charging and multi-channel peripherals as described in any one of the above.

[0030] Through the circuit for supporting multi-channel charging and multi-channel peripherals provided in the first aspect above, the circuit includes: a first interface unit, a second interface unit, a third interface unit, a first overcurrent protection chip, a second overcurrent protection chip, a third overcurrent protection chip, a first bidirectional power switch, a second bidirectional power switch, a third bidirectional power switch, a boost chip, an overvoltage protection chip, and a power management chip; the first interface unit is electrically connected to the first bidirectional power switch and the first overcurrent protection chip respectively, the first bidirectional power switch is electrically connected to the overvoltage protection chip, the second bidirectional power switch, and the third bidirectional power switch respectively, and the overvoltage protection chip is electrically connected to the power management chip; the second interface unit is electrically connected to the second bidirectional power switch and the second overcurrent protection chip respectively, the third overcurrent protection chip is electrically connected to the first overcurrent protection chip, the boost chip, the second overcurrent protection chip, and the first interface unit respectively; the enable terminals of the first overcurrent protection chip, the second overcurrent protection chip, the third overcurrent protection chip, and the boost chip are all electrically connected to the power management chip; the power management chip is used to output corresponding enable signals to control the corresponding chips to work; the first interface unit, the second interface unit, and the third interface unit are all used to connect external devices; the first bidirectional power switch, the second bidirectional power switch, and the third bidirectional power switch are respectively used to adjust their own switch states according to the charging and discharging states of the first interface unit, the second interface unit, and the third interface unit; the power management chip is also used to connect to the energy storage battery and control the charging or discharging of the energy storage battery according to the working states of the first interface unit, the second interface unit, and the third interface unit. It can be seen that according to the circuit provided by the present application, it includes multiple interface units, can connect multiple external devices simultaneously, and can switch between charging and discharging according to needs to meet different scenario requirements.

[0031] For what is provided in the second aspect above and each possible design of the second aspect, the beneficial effects can refer to the beneficial effects brought by the first aspect and each possible implementation manner of the first aspect, which will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 FIG. 1 is one of the schematic structural diagrams of the circuit for supporting multi-channel charging and multi-channel peripherals provided by the embodiment of the present application;

[0033] Figure 2 FIG. 2 is another schematic structural diagram of the circuit for supporting multi-channel charging and multi-channel peripherals provided by the embodiment of the present application;

[0034] Figure 3It is the third structural schematic diagram of the circuit supporting multi-channel charging and multi-channel peripherals provided by the embodiments of the present application;

[0035] Figure 4 It is the fourth structural schematic diagram of the circuit supporting multi-channel charging and multi-channel peripherals provided by the embodiments of the present application. Detailed implementation manners

[0036] In the present application, "at least one" means one or more, and "a plurality" means two or more. "And / or" describes the association relationship of associated objects and indicates that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone, where A and B can be singular or plural. The character " / " generally represents an "or" relationship between the associated objects before and after. "At least one (item)" or its similar expression refers to any combination of these items, including any combination of single item (item) or plural items (items). For example, at least one (item) of a alone, b alone, or c alone can represent: a alone, b alone, c alone, the combination of a and b, the combination of a and c, the combination of b and c, or the combination of a, b, and c, where a, b, and c can be single or multiple. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0037] The orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "left", "right", "front", "rear", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present application.

[0038] The terms "connected" and "coupled" should be understood in a broad sense. For example, the "connection" or "coupling" of a circuit structure can refer not only to a physical connection but also to an electrical connection or a signal connection. For example, it can be a direct connection, that is, a physical connection, or it can be indirectly connected through at least one intermediate element, as long as the circuit is connected. It can also be the internal connection of two elements; the signal connection can refer not only to the signal connection through a circuit but also to the signal connection through a media medium. For example, radio waves. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0039] The transistor in this application is a three-terminal transistor, and its three terminals are the control electrode, the first electrode, and the second electrode. The transistor can be a bipolar transistor or a field-effect transistor, etc. For example, when the transistor is a bipolar transistor, its control electrode refers to the base of the bipolar transistor, the first electrode can be the collector or emitter of the bipolar transistor, and the corresponding second electrode can be the emitter or collector of the bipolar transistor; when the transistor is a field-effect transistor, its control electrode refers to the gate of the field-effect transistor, the first electrode can be the drain or source of the field-effect transistor, and the corresponding second electrode can be the source or drain of the field-effect transistor.

[0040] In the related art, the functions of common terminal devices are relatively single and cannot meet the requirements in some complex scenarios. Moreover, the types of peripheral interfaces on the terminal device are relatively single and there are few peripheral interfaces, which cannot meet the expansion of some peripheral devices. For example, most common POS terminals on the market currently only have one charging interface for charging the POS terminal. However, in some complex application scenarios, the POS terminal needs to expand devices such as a barcode scanner, a cash box, a printer, a keyboard, or a mouse through the peripheral interface to implement an integrated payment system with multiple interfaces, multiple scenarios, and multiple applications, so as to meet the payment requirements in complex scenarios such as current retail and catering. In addition, in some application scenarios, the POS terminal needs to connect multiple peripheral devices at the same time. For example, the POS terminal needs to connect a printer to supply power to the printer, and at the same time needs to charge the built-in battery in the POS terminal through an external interface. However, the POS terminal in the related art can only achieve one of discharging to an external device or charging the POS terminal at the same time, and cannot achieve discharging to an external device and charging the POS terminal at the same time. Therefore, the terminal device in the related art is not applicable in the working scenarios with some complex requirements and has certain limitations.

[0041] In order to overcome the above deficiencies in the related art, this application provides a circuit that supports multi-channel charging and multi-channel peripherals. The circuit includes multiple interface units, multiple bidirectional power switches, multiple over-current protection chips, a power management chip, and an over-voltage protection chip. Multiple charging and discharging paths are formed by multiple interface units, multiple bidirectional power switches, and the power management chip, so that multiple external devices can be connected at the same time, and the switching between charging and discharging can be realized according to needs, or the functions of discharging to the outside and reverse charging can be carried out at the same time to meet the requirements of different scenarios.

[0042] Specifically, the circuit supporting multi-channel charging and multi-channel peripherals provided by the present application includes: a first interface unit, a second interface unit, a third interface unit, a first overcurrent protection chip, a second overcurrent protection chip, a third overcurrent protection chip, a first bidirectional power switch, a second bidirectional power switch, a third bidirectional power switch, a boost chip, an overvoltage protection chip, and a power management chip; the first interface unit is electrically connected to the first bidirectional power switch and the first overcurrent protection chip respectively, the first bidirectional power switch is electrically connected to the overvoltage protection chip, the second bidirectional power switch, and the third bidirectional power switch respectively, and the overvoltage protection chip is electrically connected to the power management chip; the second interface unit is electrically connected to the second bidirectional power switch and the second overcurrent protection chip respectively, the third overcurrent protection chip is electrically connected to the first overcurrent protection chip, the boost chip, the second overcurrent protection chip, and the first interface unit respectively; the enable terminals of the first overcurrent protection chip, the second overcurrent protection chip, the third overcurrent protection chip, and the boost chip are all electrically connected to the power management chip; the power management chip is used to output corresponding enable signals to control the corresponding chips to work; the first interface unit, the second interface unit, and the third interface unit are all used to connect external devices; the first bidirectional power switch, the second bidirectional power switch, and the third bidirectional power switch are respectively used to adjust their own switch states according to the charging and discharging states of the first interface unit, the second interface unit, and the third interface unit; the power management chip is also used to be connected to the energy storage battery and control the charging or discharging of the energy storage battery according to the working states of the first interface unit, the second interface unit, and the third interface unit. According to the circuit provided by the present application, it can be connected to multiple external devices at the same time, and can switch between charging and discharging according to needs, or can perform the functions of external discharging and reverse charging at the same time to meet the requirements of different scenarios.

[0043] Figure 1 One of the structural schematic diagrams of the circuit supporting multi-channel charging and multi-channel peripherals provided by the embodiments of the present application, please refer to Figure 1 As shown, the circuit supporting multi-channel charging and multi-channel peripherals provided by this embodiment includes: a first interface unit 11, a second interface unit 12, a third interface unit 13, a first overcurrent protection chip 14, a second overcurrent protection chip 15, a third overcurrent protection chip 16, a first bidirectional power switch 17, a second bidirectional power switch 18, a third bidirectional power switch 19, a boost chip 20, an overvoltage protection chip 23, and a power management chip 21.

[0044] Among them, the first interface unit 11 is electrically connected to the first bidirectional power switch 17 and the first overcurrent protection chip 14 respectively. The first bidirectional power switch 17 is electrically connected to the overvoltage protection chip 23, the second bidirectional power switch 18, and the third bidirectional power switch 19 respectively. The overvoltage protection chip 23 is electrically connected to the power management chip 21. The second interface unit 12 is electrically connected to the second bidirectional power switch 18 and the second overcurrent protection chip 15 respectively. The third overcurrent protection chip 16 is electrically connected to the first overcurrent protection chip 14, the boost chip 20, the second overcurrent protection chip 15, and the first interface unit 11 respectively. The enable terminals of the first overcurrent protection chip 14, the second overcurrent protection chip 15, the third overcurrent protection chip 16, and the boost chip 20 are all electrically connected to the power management chip 21. The power management chip 21 is used to output corresponding enable signals to control the corresponding chips to work. The first interface unit 11, the second interface unit 12, and the third interface unit 13 are all used to connect external devices. The first bidirectional power switch 17, the second bidirectional power switch 18, and the third bidirectional power switch 18 are respectively used to adjust their own switch states according to the charge and discharge states of the first interface unit 11, the second interface unit 12, and the third interface unit 13. The power management chip 21 is also used to be electrically connected to the energy storage battery 22 and control the charging of the energy storage battery 22 or control the energy storage battery 22 to discharge externally according to the working states of the first interface unit 11, the second interface unit 12, and the third interface unit 13.

[0045] Among them, the main functions of the first bidirectional power switch 17, the second bidirectional power switch 18, and the third bidirectional power switch 19 in this embodiment are to allow current to flow freely in two directions and prevent bidirectional voltage flow when powered off. It is usually constructed by active devices such as MOSFET or IGBT, and can allow bidirectional current flow when powered on, while preventing bidirectional voltage flow when powered off.

[0046] Among them, the main functions of the first overcurrent protection chip 14, the second overcurrent protection chip 15, and the third overcurrent protection chip 16 in this embodiment are to protect the circuit and equipment from the influence of large current or short circuit, so as to ensure the stable operation of the system and extend the service life of the equipment. The overcurrent protection chip monitors the current in the circuit. When the detected current exceeds the set threshold, it will automatically cut off the circuit to prevent the large current or short circuit from damaging the circuit and equipment. This protection mechanism is crucial for various electronic devices, especially when facing external circuit short circuit or voltage abnormality, it can effectively protect the internal circuit from being affected.

[0047] Among them, the boost chip 20 in this embodiment is mainly used to boost the voltage output by the energy storage battery 22 or the power management chip 21, so that the voltage value after being processed by the boost chip 20 meets the requirements of the peripheral devices connected to each interface unit. Among them, the main function of the overvoltage protection chip 23 in this embodiment is to protect the circuit and devices from damage caused by excessive voltage. When the input voltage exceeds the set threshold, the overvoltage protection chip will automatically cut off the circuit to prevent the high voltage from damaging the subsequent circuit or devices. This protection mechanism is crucial for ensuring the stable operation of the system and extending the service life of the devices. When the overvoltage protection chip (OVP, Over-Voltage Protection) 23 detects that the input voltage exceeds the preset threshold, it will quickly respond and cut off the circuit output, thereby protecting the subsequent circuit from damage by high voltage. For example, when the input voltage rises from 5V to 9V, the overvoltage protection chip 23 will turn off the output within the microsecond level to prevent the voltage from continuing to rise.

[0048] Among them, the core function of the power management chip 21 is to ensure the efficient and stable operation of the electronic device and extend the battery life by intelligently regulating the power distribution and conversion. Specifically, it includes voltage conversion and regulation, dynamic current regulation, power distribution and energy consumption optimization, and multiple protection mechanisms.

[0049] It can be understood that the first interface unit 11, the second interface unit 12, and the third interface unit 13 in this embodiment are a general term for multiple different or the same type of interfaces. Each interface unit may include one or more peripheral interfaces, and when the interface unit includes multiple peripheral interfaces, the interface types of each peripheral interface may be the same or different.

[0050] In one embodiment, the above-mentioned certain interface unit may include one or more of a USB Type-C interface, a USB Type-A interface, and a USB Type-B interface. Among them, the USB Type-A interface is the most common USB interface, usually used for devices such as mice, keyboards, and USB flash drives on computers, and can be used for charging or data transmission; the USB Type-C interface is the most popular USB interface at present, supports plugging in either way, and is widely used in modern electronic devices. The Type-C interface not only supports charging and data transmission, but also supports video output and high-speed data transmission protocols; the USB Type-B interface is common in devices such as printers and scanners, and it also has miniaturized versions, such as Mini Type-B and Micro Type-B. The latter was once the standard interface for early Android phones. In addition, USB interfaces are also divided into different versions according to transmission speed and protocol, such as USB 2.0, USB 3.0, USB 3.1, USB4, etc., but these belong to technical standards rather than interface types. Generally speaking, the physical types of USB interfaces are mainly Type-A, Type-B, and Type-C, and each type may support different technical standards and functions.

[0051] In addition, in one embodiment, in addition to the above-mentioned various common types of interfaces that can be provided on each interface unit, a magnetic charging interface that has emerged in recent years can also be provided. For example, in the prior art, some wearable devices, such as smart watches, smart bracelets, or wireless Bluetooth headsets, are electrically connected through two magnetic posts with positive and negative poles to two positive and negative contact points on the wearable device. At the same time, through the magnetic attraction effect, the charging base and the wearable device can be closely combined together to achieve charging of the wearable device. Or, in one embodiment, in addition to the above-mentioned various common types of interfaces that can be provided on each interface unit, a wireless charging interface can also be provided. The core principle of a wireless charger is based on the law of electromagnetic induction. An alternating magnetic field is generated by the transmitting coil, and the receiving coil senses the change of the magnetic field and converts it into an electric current to achieve power transmission; most mainstream electronic devices support wireless charging, which improves the user experience.

[0052] Specifically, in one embodiment, the first interface unit 11 specifically includes a USB Type-C interface, a USB 2.0 interface, and a USB 3.0 interface; the second interface unit 12 includes a USB Type-B interface and a magnetic charging base, and the third interface unit 13 also includes a USB Type-B interface and a magnetic charging base.

[0053] Based on the interface type settings on the first interface unit 11, the second interface unit 12, and the third interface unit 13 in this embodiment, each interface unit can achieve forward charging of the energy storage battery 22. At the same time, through the control of the power management chip 21, the energy storage battery 22 can discharge to each interface unit. For example, forward charging of the energy storage battery 22 is achieved through a USB Type-C interface on the first interface unit 11. At the same time, through the control of the power management chip 21, external devices can be charged through the USB Type-C interface.

[0054] In one embodiment, any one of the first interface unit 11, the second interface unit 12, and the third interface unit 13 is used to connect to an external charging device to charge the energy storage battery 22; and at the same time, only one of the first interface unit 11, the second interface unit 12, and the third interface unit 13 can achieve charging of the energy storage battery 22.

[0055] In this embodiment, the charging priorities of the first interface unit 11, the second interface unit 12, and the third interface unit 13 for the energy storage battery 22 are as follows: the priority of the first interface unit 11 is higher than that of the second interface unit 12, and the priority of the second interface unit 12 is higher than that of the third interface unit 13. In other words, when the first interface unit 11 is connected to an external power source to charge the energy storage battery 22, the second interface unit 12 and the third interface unit 13 cannot be connected to an external power source at the same time to charge the energy storage battery 22; when the second interface unit 12 is connected to an external power source to charge the energy storage battery 22, the third interface unit 13 cannot be connected to an external power source at the same time to charge the energy storage battery 22.

[0056] It should be noted that for the circuit supporting multi-channel charging and multi-channel peripherals in this embodiment, in the initial power-on state, the first bidirectional power switch 17, the second bidirectional power switch 18, and the third bidirectional power switch 19 are all in the on state.

[0057] In one embodiment, when an external power supply is connected to the first interface unit 11 and the energy storage battery 22 is in a charging state, the circuit for controlling the charging direction of the first bidirectional power switch 17 is in a conducting state. Then, the current charges the energy storage battery 22 through the first bidirectional power switch 17, the overvoltage protection chip 23, and the power management chip 21. At the same time, when the first bidirectional power switch 17 detects a charging current signal, it is used to generate a first interrupt signal Switch1_RXN and send the first interrupt signal Switch1_RXN to the second bidirectional power switch 18 and the third bidirectional power switch 19 respectively. The second bidirectional power switch 18 and the third bidirectional power switch 19 are both used to switch from a conducting state to a cutoff state under the control of the first interrupt signal Switch1_RXN, that is, the second bidirectional power switch 18 and the third bidirectional power switch 19 switch the circuit for the charging direction to the cutoff state, so that the energy storage battery 22 cannot be charged through the second interface unit 12 and the third interface unit 13.

[0058] Figure 2 This is the second structural schematic diagram of the circuit supporting multiple-channel charging and multiple-channel peripherals provided by the embodiment of the present application. Please refer to Figure 2 As shown, in one embodiment, when an external power supply is connected to the second interface unit 12 and the second interface unit 12 is in a charging state for the energy storage battery 22, the circuit for controlling the charging direction of the second bidirectional power switch 18 is in a conducting state. At the same time, the second bidirectional power switch 18 is used to generate a second interrupt signal Switch2_RXN and send the second interrupt signal Switch2_RXN to the first bidirectional power switch 17 and the third bidirectional power switch 19. The first bidirectional power switch 17 and the third bidirectional power switch 19 are both used to switch from a conducting state to a cutoff state under the control of the second interrupt signal Switch2_RXN, so that the energy storage battery 22 cannot be charged through the first interface unit 11 and the third interface unit 13.

[0059] In one embodiment, when an external power supply is connected to the third interface unit 13 and the third interface unit 13 is in a charging state for the energy storage battery 22, the third bidirectional power switch 19 is in a conducting state. At the same time, the third bidirectional power switch 19 is used to generate a third interrupt signal and send the third interrupt signal to the first bidirectional power switch 17 and the third bidirectional power switch 19. The first bidirectional power switch 17 and the third bidirectional power switch 19 are used to switch from a conducting state to a cutoff state under the control of the third interrupt signal.

[0060] Figure 3 This is the third structural schematic diagram of the circuit structure supporting multiple-channel charging and multiple-channel peripherals provided by the embodiment of the present application. Please refer to Figure 3As shown in the figure, the circuit supporting multi-channel charging and multi-channel peripherals provided in this embodiment further includes a charging detection circuit 24. The input end of the charging detection circuit 24 is electrically connected to the output ends of the second bidirectional power switch 18 and the third bidirectional power switch 19 respectively, and the output end of the charging detection circuit 24 is electrically connected to the power management chip 21. The charging detection circuit 24 is used to detect the first voltage at the output ends of the second bidirectional power switch 18 and the third bidirectional power switch 19, and determine whether the energy storage battery 22 is in a charging state according to the first voltage. If so, a first detection signal is generated. The power management chip 21 is further used to control the first bidirectional power 17 switch to switch to the off state according to the first detection signal.

[0061] Figure 4 FIG. 4 is a schematic structural diagram of the circuit supporting multi-channel charging and multi-channel peripherals provided in an embodiment of the present application. Please refer to Figure 4 As shown in the figure, the charging detection circuit 24 provided in this embodiment includes a transistor M1 and a first resistor R1. The control electrode of the transistor M1 is electrically connected to the output ends of the second bidirectional power switch 18 and the third bidirectional power switch 19 respectively. The first electrode of the transistor M1 is grounded, and the second electrode of the transistor M1 is electrically connected to the power management chip 21. When an external power supply is connected to the second interface unit 12 and the third interface unit 13, the control electrode of the transistor M1 is at a high level, then the transistor M1 conducts. At this time, the state of the level signal DCIN_DET output by the second electrode of the transistor M1 is 0. When the power management chip 21 detects that the state of the level signal DCIN_DET is 0, it controls the first bidirectional power 17 switch to switch to the off state.

[0062] In one embodiment, when it is detected that a load device is connected to the first interface unit 11, and there is no load connected to the second interface unit 12 and the third interface unit 13, the power management chip 21 controls the energy storage battery 22 and the overvoltage protection chip 23 to work, and at the same time controls the discharge circuit of the first bidirectional switch 17 to be in a conducting state to supply power to the load device on the first interface unit 11.

[0063] In one embodiment, when it is detected that a load device is connected to the second interface unit 12, the power management chip 21 controls the energy storage battery 22, the boost chip 22, and the second overcurrent protection core 15 to work to supply power to the load device on the second interface unit 12. Specifically, the power management chip 21 outputs a voltage signal VPH_PWR to the boost chip 22. The voltage signal VPH_PWR is generally less than 5V. The boost chip 22 is used to boost the voltage signal VPH_PWR to 5V, and then after the overcurrent protection processing by the second overcurrent protection core 15, it is output to the load device on the second interface unit 12.

[0064] In one embodiment, when a load device is detected to be connected to the third interface unit 13, the power management chip 21 controls the energy storage battery 22, the boost chip 20, and the third overcurrent protection core 16 to work to supply power to the load device on the third interface unit 13.

[0065] In one embodiment, when load devices are detected to be connected to both the second interface unit 12 and the third interface unit 13, the boost chip 22 is used to boost the voltage signal VPH_PWR to 5V, and then after the overcurrent protection processing by the second overcurrent protection core 15 and the third overcurrent protection core 16 respectively, it is output to supply power to the load devices on the second interface unit 12 and the third interface unit 13.

[0066] In one embodiment, when load devices are detected to be connected to the first interface unit 11, the second interface unit 12, and the third interface unit 13, the boost chip 22 is used to boost the voltage signal VPH_PWR to 5V, and then after the overcurrent protection processing by the first overcurrent protection chip 14, the second overcurrent protection core 15, and the third overcurrent protection core 16 respectively, it is output to supply power to the load devices on the second interface unit 12 and the third interface unit 13.

[0067] In addition, according to the circuit provided in this embodiment that supports multi-channel charging and multi-channel peripherals, it can simultaneously achieve forward charging of the energy storage battery 22 and reverse discharging of the energy storage battery 22 to external devices under the control of the power management chip 21.

[0068] In one embodiment, when a load device is connected to the first interface unit 11 and a charging device is connected to the second interface unit 12, the second bidirectional power switch 18 is turned on to charge the energy storage battery 22 through the overvoltage protection chip 23 and the power management chip 21; at the same time, the power management chip 22 will detect that the state of the level signal DCIN_DET is 0, then control the first bidirectional power switch 17 to turn off, and at the same time control the energy storage battery 22, the boost chip 20, and the first overcurrent protection chip 14 to work to supply power to the load device on the first interface unit 11.

[0069] In one embodiment, when a load device is connected to the first interface unit 11 and a charging device is connected to the third interface unit 13, the third bidirectional power switch 19 is turned on to charge the energy storage battery 22 through the overvoltage protection chip 23 and the power management chip 21; the power management chip 21 is used to control the first bidirectional power switch 17 to turn off, and at the same time control the energy storage battery 22, the boost chip 20, and the first overcurrent protection chip 14 to work to supply power to the load device on the first interface unit 11.

[0070] In one embodiment, when a charging device is connected to the second interface unit 12 and load devices are connected to the first interface unit 11 and the third interface unit 13, the second bidirectional power switch 18 is turned on to charge the energy storage battery 22 through the overvoltage protection chip 23 and the power management chip 21; the power management chip 22 is configured to control the first bidirectional power switch 17 to turn off, and at the same time, the second bidirectional power switch 18 outputs a second interrupt signal Switch2_RXN to the third bidirectional power switch 19 to control the third bidirectional power switch 19 to turn off, and at the same time, control the energy storage battery 22, the boost chip 20, the first overcurrent protection chip 14, and the third overcurrent protection chip 16 to operate to supply power to the load devices on the first interface unit 11 and the third interface unit 13.

[0071] In one embodiment, when a charging device is connected to the third interface unit 13 and load devices are connected to the first interface unit 11 and the second interface unit 12, the third bidirectional power switch 19 is turned on to charge the energy storage battery 22 through the overvoltage protection chip 23 and the power management chip 21; the power management chip 21 is configured to control the first bidirectional power switch 17 and the second bidirectional power switch 18 to turn off, and at the same time, control the energy storage battery 22, the boost chip 20, the first overcurrent protection chip 14, and the second overcurrent protection chip 15 to operate to supply power to the load devices on the first interface unit 11 and the second interface unit 12.

[0072] It can be seen from the above description that both the second interface unit 12 and the third interface unit 13 provided in this embodiment include a plurality of different device interfaces, and the plurality of different device interfaces are used to connect load devices and / or charging devices; therefore, forward charging and reverse discharging can be simultaneously achieved through the second interface unit 12 or the third interface unit 13.

[0073] In one embodiment, when a charging device and a load device are simultaneously connected to different device interfaces in the second interface unit 12, the second bidirectional power switch 18 conducts bidirectionally. At the same time, the power management chip 21 is configured to control the energy storage battery 22, the boost chip 20, and the second overcurrent protection chip 15 to operate to supply power to the load devices on the second interface unit 12;

[0074] In one embodiment, when a charging device and a load device are simultaneously connected to different device interfaces in the third interface unit 13, the third bidirectional power switch 19 is turned on. At the same time, the power management chip 21 is configured to control the energy storage battery 22, the boost chip 20, and the third overcurrent protection chip 16 to operate to supply power to the load devices on the third interface unit 13.

[0075] Exemplarily, taking the second interface unit 12 as an example, the second interface unit 12 includes a USB Type-B interface and a magnetic charging dock. The USB Type-B interface can be connected to an external power device, such as a charger, so that the energy storage battery 22 can be charged through the USB Type-B interface. At the same time, the wearable device can be charged through the magnetic charging dock. In addition, the way of simultaneous charging and discharging on the third interface unit 13 is the same as that of the second interface unit 12, which will not be elaborated here.

[0076] Please continue to refer to Figure 4 As shown, in this embodiment, the power management chip 21 is electrically connected to the first overcurrent protection chip 14, the second overcurrent protection chip 15, the third overcurrent protection chip 16, and the boost chip 20 at the same time. The power management chip 21 outputs a first enable signal OCP1_EN to control the operation of the first overcurrent protection chip 14. The power management chip 21 outputs a second enable signal OCP2_EN to control the operation of the second overcurrent protection chip 15. The power management chip 21 outputs a third enable signal OCP3_EN to control the operation of the third overcurrent protection chip 16. The power management chip 21 outputs a boost enable signal Boost_EN to control the operation of the boost chip 20.

[0077] In one embodiment, the charging and discharging functions of the first interface unit 11, the second interface unit 12, and the third interface unit 13 in this embodiment can be any combination as shown in Table 1 below, where ● indicates that the function is available, and × indicates that the function is not available.

[0078] Table 1

[0079]

[0080] This application aims to design a charging and external device power supply system for an integrated payment terminal. The integrated payment terminal has multiple external interfaces, and each external interface can not only charge the payment terminal, but also supply power to external devices such as barcode scanners and cash boxes in reverse, realizing a multi-interface, multi-scenario, and multi-application integrated payment system. It is suitable for the payment requirements in complex scenarios such as retail and catering.

[0081] This application uses only one charging IC and one boost IC to realize that while the first interface unit 11, the second interface unit 12, and the third interface unit 13 charge the payment terminal, they can also supply power to external devices, which is applicable to a variety of complex application scenarios.

[0082] Based on the circuit for supporting multi-channel charging and multi-channel peripherals provided in the above embodiments, an embodiment of the present application further provides an electronic device, which includes the circuit for supporting multi-channel charging and multi-channel peripherals provided in any one of the above embodiments; the electronic device can be common electronic devices such as an expansion dock, an electronic terminal, a payment terminal, etc.

[0083] According to the electronic device provided by the present application, it can be connected to multiple external devices at the same time, and can switch between charging and discharging according to needs, or can perform the functions of external discharging and reverse charging at the same time to meet the requirements of different scenarios.

[0084] Finally, it should be noted that: the above embodiments are only specific implementation manners of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A circuit supporting multi-channel charging and multi-channel peripherals, characterized in that, Including: A first interface unit, a second interface unit, a third interface unit, a first overcurrent protection chip, a second overcurrent protection chip, a third overcurrent protection chip, a first bidirectional power switch, a second bidirectional power switch, a third bidirectional power switch, a boost chip, an overvoltage protection chip, and a power management chip; The first interface unit is electrically connected to the first bidirectional power switch and the first overcurrent protection chip respectively. The first bidirectional power switch is electrically connected to the overvoltage protection chip, the second bidirectional power switch, and the third bidirectional power switch respectively. The overvoltage protection chip is electrically connected to the power management chip. The second interface unit is electrically connected to the second bidirectional power switch and the second overcurrent protection chip respectively. The third overcurrent protection chip is electrically connected to the first overcurrent protection chip, the boost chip, the second overcurrent protection chip, and the first interface unit respectively; The enable terminals of the first overcurrent protection chip, the second overcurrent protection chip, the third overcurrent protection chip, and the boost chip are all electrically connected to the power management chip. The power management chip is used to output corresponding enable signals to control the corresponding chips to work; The first interface unit, the second interface unit, and the third interface unit are all used to connect external devices. The first bidirectional power switch, the second bidirectional power switch, and the third bidirectional power switch are respectively used to adjust their own switch states according to the charge and discharge states of the first interface unit, the second interface unit, and the third interface unit; The power management chip is also used to connect to the energy storage battery and control the charging or discharging of the energy storage battery according to the working states of the first interface unit, the second interface unit, and the third interface unit.

2. The circuit for supporting multi-channel charging and multi-channel peripherals according to claim 1, characterized in that Any one of the first interface unit, the second interface unit, and the third interface unit is used to connect an external charging device to charge the energy storage battery; The priorities of the first interface unit, the second interface unit, and the third interface unit for charging the energy storage battery are: the priority of the first interface unit is higher than that of the second interface unit, and the priority of the second interface unit is higher than that of the third interface unit.

3. The circuit for supporting multiple-channel charging and multiple-channel peripherals according to claim 2, characterized in that, When the first interface unit is in the state of charging the energy storage battery, the first bidirectional power switch is in the conducting state. At the same time, the first bidirectional power switch is used to generate a first interrupt signal and send the first interrupt signal to the second bidirectional power switch and the third bidirectional power switch respectively; The second bidirectional power switch and the third bidirectional power switch are both used to switch from the conducting state to the off state under the control of the first interrupt signal.

4. The circuit for supporting multi-channel charging and multi-channel peripherals according to claim 3, characterized in that, When the second interface unit is in the state of charging the energy storage battery, the second bidirectional power switch is in the conducting state. At the same time, the second bidirectional power switch is used to generate a second interrupt signal and send the second interrupt signal to the first bidirectional power switch and the third bidirectional power switch. The first bidirectional power switch and the third bidirectional power switch are both used to switch from the conducting state to the off state under the control of the second interrupt signal; When the third interface unit is in the state of charging the energy storage battery, the third bidirectional power switch is in the on state; meanwhile, the third bidirectional power switch is used to generate a third interrupt signal and send the third interrupt signal to the first bidirectional power switch and the third bidirectional power switch; the first bidirectional power switch and the third bidirectional power switch are used to switch from the on state to the off state under the control of the third interrupt signal.

5. The circuit for supporting multiple-channel charging and multiple-channel peripherals according to claim 3, wherein It further includes a charging detection circuit. The input end of the charging detection circuit is electrically connected to the output ends of the second bidirectional power switch and the third bidirectional power switch respectively, and the output end of the charging detection circuit is electrically connected to the power management chip; The charging detection circuit is used to detect a first voltage at the output ends of the second bidirectional power switch and the third bidirectional power switch, and determine whether it is in the state of charging the energy storage battery according to the first voltage. If so, a first detection signal is generated; The power management chip is further used to control the first bidirectional power switch to switch to the off state according to the first detection signal.

6. The circuit for supporting multiple-channel charging and multiple-channel peripherals according to claim 5, characterized in that The charging detection circuit includes a transistor and a first resistor. The control electrode of the transistor is electrically connected to the output ends of the second bidirectional power switch and the third bidirectional power switch respectively. The first electrode of the transistor is grounded, and the second electrode of the transistor is electrically connected to the power management chip.

7. The circuit supporting multi-channel charging and multi-channel peripherals according to any one of claims 1-6, characterized in that When it is detected that a load device is connected to the first interface unit, and there is no load connected to the second interface unit and the third interface unit, the power management chip controls the energy storage battery and the overvoltage protection chip to work, and at the same time controls the first bidirectional power switch to be in the on state to supply power to the load device on the first interface unit; When it is detected that a load device is connected to the second interface unit, the power management chip controls the energy storage battery, the boost chip and the second overcurrent protection core to work to supply power to the load device on the second interface unit; When it is detected that a load device is connected to the third interface unit, the power management chip controls the energy storage battery, the boost chip and the third overcurrent protection core to work to supply power to the load device on the third interface unit.

8. The circuit for supporting multiple-channel charging and multiple-channel peripherals according to claim 7, characterized in that When a load device is connected to the first interface unit and a charging device is connected to the second interface unit, the second bidirectional power switch conducts to charge the energy storage battery through the overvoltage protection chip and the power management chip; the power management chip is used to control the first bidirectional power switch to turn off, and at the same time control the energy storage battery, the boost chip and the first overcurrent protection chip to work to supply power to the load device on the first interface unit; Alternatively, when a load device is connected to the first interface unit and a charging device is connected to the third interface unit, the third bidirectional power switch is turned on to charge the energy storage battery through the overvoltage protection chip and the power management chip; the power management chip is configured to turn off the first bidirectional power switch and simultaneously control the operation of the energy storage battery, the boost chip, and the first overcurrent protection chip to supply power to the load device on the first interface unit; Alternatively, when a charging device is connected to the second interface unit and load devices are connected to the first interface unit and the third interface unit, the second bidirectional power switch is turned on to charge the energy storage battery through the overvoltage protection chip and the power management chip; the power management chip is configured to turn off the first bidirectional power switch and the third bidirectional power switch and simultaneously control the operation of the energy storage battery, the boost chip, the first overcurrent protection chip, and the third overcurrent protection chip to supply power to the load devices on the first interface unit and the third interface unit; Alternatively, when a charging device is connected to the third interface unit and load devices are connected to the first interface unit and the second interface unit, the third bidirectional power switch is turned on to charge the energy storage battery through the overvoltage protection chip and the power management chip; the power management chip is configured to turn off the first bidirectional power switch and the second bidirectional power switch and simultaneously control the operation of the energy storage battery, the boost chip, the first overcurrent protection chip, and the second overcurrent protection chip to supply power to the load devices on the first interface unit and the second interface unit.

9. The circuit for supporting multi-channel charging and multi-channel peripherals according to claim 8, wherein Both the second interface unit and the third interface unit include a plurality of different device interfaces, and the plurality of different device interfaces are used to connect load devices and / or charging devices; When a charging device and a load device are simultaneously connected to different device interfaces in the second interface unit, the second bidirectional power switch is turned on, and at the same time, the power management chip is configured to control the operation of the energy storage battery, the boost chip, and the second overcurrent protection chip to supply power to the load device on the second interface unit; Alternatively, when a charging device and a load device are simultaneously connected to different device interfaces in the third interface unit, the third bidirectional power switch is turned on, and at the same time, the power management chip is configured to control the operation of the energy storage battery, the boost chip, and the third overcurrent protection chip to supply power to the load device on the third interface unit.

10. An electronic device, characterized in that, Comprising the circuit for supporting multi-channel charging and multi-channel peripherals according to any one of claims 1-9.

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