Power management circuit for shared switcher and shared switcher

Abstract

The utility model discloses a power supply management circuit for a shared switcher and the shared switcher. The power supply management circuit comprises a plurality of uplink connection interfaces, at least one downlink connection interface, an uplink power supply management and control circuit, an external power supply connection interface, an external power supply management and control circuit, a driving power supply concentrator and a charging switch control circuit. And the sharing switcher is used for establishing data communication connection between each downlink connection interface and one intelligent system host connected with the uplink connection interface, so that the intelligent system host connected with the uplink connection interface identifies and loads the computer input equipment and / or the computer peripheral equipment connected with the downlink connection interface. The driving power supply concentrator provides the working power supply for the shared switcher by using the power supply obtained from the intelligent system host and the external power supply, so that the situation that peripheral equipment cannot be used due to insufficient electric quantity of the equipment of the shared switcher is avoided, and the situation that the switching work is interrupted when the intelligent system host is removed from connection is also avoided; and the user experience is improved.

Description

Technical Field

[0001] The present application relates to the technical field of computer peripherals, and in particular to a power management circuit for a shared switch and a shared switch. Background Art

[0002] The shared switch is a multi-interface expansion device based on the USB interface. It only requires a small number of input peripherals (such as a keyboard and mouse) to switch freely between multiple smart terminals (personal computers, mobile phones and / or tablets) to achieve time-sharing management of multiple smart terminal devices at the same time, greatly improving management efficiency and reliability. Since multiple smart terminal devices can be connected at the same time, the shared switch will involve the input of multiple power supplies (power input from the USB interface of the smart terminal device and the external power supply of the shared switch itself), so it is necessary to reasonably manage the multiple power supplies input to the shared switch. Utility Model Content

[0003] The technical problem that this application intends to solve is how to reasonably control the input power of the shared switch.

[0004] In a first aspect, an embodiment discloses a power management circuit for a shared switch, comprising at least two uplink connection interfaces, at least one downlink connection interface, uplink power management circuits having the same number as the uplink connection interfaces, an external power connection interface, an external power management circuit, a driving power hub, and a charging switch control circuit;

[0005] Each of the uplink connection interfaces is used to connect to an intelligent system host having an independent operating system and outputting power to the uplink connection interface;

[0006] Each of the uplink power management and control circuits is connected between one of the uplink connection interfaces and the driving power hub, and the uplink power management and control circuit is used to output the power input from the intelligent system host connected to the uplink connection interface to the driving power hub;

[0007] The external power connection interface is used as an input interface of an external power supply;

[0008] The external power supply control circuit is connected between the driving power supply hub and the external power supply connection interface, and is used to output the power input by the external power supply to the driving power supply hub;

[0009] The charging switch control circuit is respectively connected to the external power supply control circuit and each of the uplink power supply control circuits; the external power supply control circuit is also used to output the power input from the external power supply to the charging switch control circuit, and the charging switch control circuit is also used to output the power input from the external power supply to the uplink connection interface through the uplink power supply control circuit, so as to reversely charge the intelligent system host connected to the uplink connection interface;

[0010] The driving power hub is used to obtain power from the intelligent system host and the external power supply to provide working power for the shared switch;

[0011] Each of the downstream connection interfaces is used to connect to a computer input device and / or a computer peripheral device;

[0012] The shared switch is used to establish a data communication connection between each of the downstream connection interfaces and one of the intelligent system hosts connected to the upstream connection interface, so as to enable the intelligent system host connected to the upstream connection interface to identify and load the computer input device and / or computer peripheral device connected to the downstream connection interface.

[0013] In one embodiment, the power management circuit also includes the same number of uplink electrical connection indication circuits as the uplink power control circuits, and each of the uplink electrical connection indication circuits is connected to one of the uplink power control circuits, and is used to identify the working status of the uplink power control circuit providing power to the driving power hub or reverse charging the intelligent system host.

[0014] In one embodiment, the power management circuit further includes an external electrical connection indication circuit connected to the external power control circuit and used to identify the working state of the external power control circuit.

[0015] In one embodiment, the upstream connection interface, the downstream connection interface and / or the external power connection interface are USB-C interfaces.

[0016] In one embodiment, the uplink power management circuit and the external power management circuit each include a PD power fast charging control chip, and the PD power fast charging control chip supports the PD fast charging protocol.

[0017] In one embodiment, when the driving power hub obtains the power through the external power management circuit, the driving power hub is used to use only the power input by the external power supply to supply power to the shared switch.

[0018] In one embodiment, when the external power connection interface is not connected to the external power supply, the driving power hub is used to use the electric energy input by each of the upstream power management circuits as the power supply for the shared switch to ensure that the shared switch operates normally when the intelligent system host stops supplying power.

[0019] In a second aspect, an embodiment discloses a shared switch, including the power management circuit as described in the first aspect, wherein the intelligent system host includes a computer, a mobile phone, an intelligent mobile terminal and / or a tablet computer.

[0020] In one embodiment, the shared switch further includes a shell and a display module disposed on the shell, and the display module is used to identify the connection status of each of the uplink connection interfaces and / or each of the downlink connection interfaces.

[0021] In one embodiment, the display module is further used to identify the charging and discharging status information connected to the uplink connection interface; the charging and discharging status information includes charging power information.

[0022] According to the shared switch of the above embodiment, the power obtained by the intelligent system host and the external power supply are used together to provide working power for the shared switch, so that the shared switch will not cause the peripherals to be unusable due to insufficient power of the device, and the switching work will not be interrupted when the intelligent system host removes the connection, thereby improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a structural block diagram of a power management circuit in implementation;

[0024] Figure 2 It is a structural block diagram of a power management circuit of a three-PD controller architecture in an embodiment. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below by specific embodiments in conjunction with the accompanying drawings. Wherein similar elements in different embodiments adopt associated similar element numbers. In the following embodiments, many detailed descriptions are for making the present application better understood. However, those skilled in the art can easily recognize that some features can be omitted in different situations, or can be replaced by other elements, materials, methods. In some cases, some operations related to the present application are not shown or described in the specification, this is to avoid the core part of the present application being overwhelmed by too much description, and for those skilled in the art, it is not necessary to describe these related operations in detail, and they can fully understand the related operations according to the description in the specification and the general technical knowledge in the art.

[0026] In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various implementations. At the same time, the steps or actions in the method description can also be interchanged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the various sequences in the specification and the drawings are only for the purpose of clearly describing a certain embodiment and are not meant to be a required sequence, unless otherwise specified that a certain sequence must be followed.

[0027] The serial numbers of the components in this document, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings).

[0028] The shared switch based on the USB-C interface is an interface expansion device for the intelligent system host (computer or tablet), and is responsible for the functions of device switching, interface conversion, signal conversion, and power distribution processing. When processing device switching and PD charging, each PD controller needs to process the connection status of the current interface, and also needs to process the dynamic conversion between charging and discharging and power supply switching to the device. Taking the dual PD controller architecture as an example, when there is no power input to the upstream connection interface, the USB-Host interface needs to be charged with a PD adapter (the power supply of the shared switch itself). When the battery of the USB-Host interface has a certain amount of power and can power the shared switch, the shared switch is connected to the USB-Host interface. At this time, the shared switch is powered normally to ensure that the shared switch can work and switch normally. The above dual PD controller architecture will have the following problems in actual application. One is that when there is no power input to the upstream connection interface, after connecting the shared switch, the shared switch cannot work, and cannot charge the intelligent system host connected to the upstream. The intelligent system host connected to the upstream needs to be directly connected to the PD adapter so that the battery of the intelligent system host can be charged to a certain amount of power before it can work normally. If there is no I2C communication between the intelligent system host and the shared switch, the dual PD controller architecture will cause the upstream connected intelligent system host that is powered first to start working normally, while the upstream connected intelligent system host that is connected later will have power without communication, violating the logic of CC communication before power supply, and there is a probability that it will not work normally; another is that when the shared switch performs charge and discharge conversion or plugs in and out the interface, the shared switch will not respond in time, causing work interruption during the switching process.

[0029] In the embodiment of the present application, a multi-PD controller architecture (more than three PD adapters) is used to draw power from the intelligent system host and the power adapter that can obtain power, so as to ensure that the shared switch can be connected and used at any time and switch freely.

[0030] Embodiment 1

[0031] Please refer to Figure 1 , is a structural block diagram of a power management circuit in implementation, the power management circuit includes at least two upstream connection interfaces 10, at least one downstream connection interface 20, upstream power management circuits 70 with the same number as the upstream connection interfaces 10, external power connection interfaces 40, external power management circuits 50, driving power hubs 30 and charging switch control circuits 60. Each upstream connection interface 10 is used to connect an intelligent system host with an independent operating system and output power to the upstream connection interface 10. Each upstream power management circuit 70 is connected between an upstream connection interface 10 and the driving power hub 30, and the upstream power management circuit 70 is used to output the power input by the intelligent system host connected to the upstream connection interface 10 to the driving power hub 30. The external power connection interface 40 is used as an input interface of the external power supply. The external power management circuit 50 is connected between the driving power hub 30 and the external power connection interface 40, and is used to output the power input by the external power supply to the driving power hub 30. The charging switch control circuit 60 is respectively connected to the external power supply control circuit 50 and each upstream power supply control circuit 70. The external power supply control circuit 50 is also used to output the power input by the external power supply to the charging switch control circuit 60. The charging switch control circuit 60 is also used to output the power input by the external power supply to the upstream connection interface 10 through the upstream power supply control circuit 70, so as to reversely charge the intelligent system host connected to the upstream connection interface 10. The driving power hub 30 is used to provide working power to the shared switch with the power obtained from the intelligent system host and the external power supply. Each downstream connection interface 20 is used to connect a computer input device and / or a computer peripheral device. The shared switch is used to establish a data communication connection between each downstream connection interface 20 and an intelligent system host connected to the upstream connection interface 10, so as to enable the intelligent system host connected to the upstream connection interface 10 to identify and load the computer input device and / or computer peripheral device connected to the downstream connection interface 20.

[0032] In one embodiment, the power management circuit further includes an upstream electrical connection indication circuit 80 having the same number as the upstream power control circuit 70, each upstream electrical connection indication circuit 80 being connected to an upstream power control circuit 70, and being used to identify the working state of the upstream power control circuit 70 providing power to the driving power hub 30 or performing reverse charging to the intelligent system host. In one embodiment, the power management circuit further includes an external electrical connection indication circuit 90, which is connected to the external power control circuit 50, and is used to identify the working state of the external power control circuit 50. In one embodiment, the power management circuit further includes a downstream electrical connection indication circuit, which is used to identify the connection state of the downstream connection interface 20.

[0033] In one embodiment, the upstream connection interface, the downstream connection interface and the external power connection interface are USB-C interfaces. In one embodiment, the upstream power management circuit and the external power management circuit each include a PD power fast charging control chip, and the PD power fast charging control chip supports the PD fast charging protocol.

[0034] In one embodiment, when the driving power hub 30 obtains power through the external power management circuit 50, the driving power hub 30 is used to use only the power input from the external power supply to supply power to the shared switch. In one embodiment, when the external power connection interface 40 is not connected to the external power supply, the driving power hub 30 is used to use the power input from each uplink power management circuit 70 as the power supply for the shared switch to ensure that the shared switch works normally when the intelligent system host stops supplying power.

[0035] In one embodiment of the present application, a shared switch is also disclosed, including the power management circuit as described above, wherein the intelligent system host includes a computer, a mobile phone, an intelligent mobile terminal and / or a tablet computer. In one embodiment, the shared switch also includes a housing and a display module disposed on the housing, and the display module is used to identify the connection status of each upstream connection interface and each downstream connection interface. In one embodiment, the display module is also used to identify the charge and discharge status information of the upstream connection interface, wherein the charge and discharge status information includes the charge power information.

[0036] The following describes a power supply method of the shared switch disclosed in the present application through a specific embodiment, which specifically includes:

[0037] Please refer to Figure 2, is a block diagram of the power management circuit structure of the three PD controller architecture in an embodiment, USB-C interface 1 and USB-C interface 2 are used as upstream connection interfaces, USB-C interface 3 is used as downstream connection interface, PD chip 4 and PD chip 5 are used as upstream power control circuits, PD chip 6 is used as external power control circuits, PD / HUB7 is used as a driving power hub, and switch power supply 8 is used as a charging switch control circuit. In one embodiment, PD chip 4, PD chip 5 and PD chip 6 are three FL7102 control chips respectively, each FL7102 control chip controls the function switching and power supply management of the USB-C interface respectively, and the FL7102 control chip complies with PD3.0 and USB-C application specifications, and performs I2C communication with the control processor of the shared switch through the I2CCLK_7102_A / I2CDAT_7102_A pins. The shared switch is connected to the Host (upstream connection interface). When the power of the Host is used up or the power supply capacity is insufficient to support the operation of the shared switch, the PD adapter (external power connection interface) can be connected to the downstream PD input port. At this time, the USB-C3 interface is controlled by the PD chip 6, and the FL7102 chip is connected to the CC of the external PD adapter through the DFP-CC channel. After the PD adapter detects the CC, it reads the E-Marker information of the connected wire and outputs 5V power to the switch circuit. The wire E-Marker information includes wire type, load capacity, transmission speed and version information. After the PD adapter outputs 5V, the shared switch can work normally. After the control processor of the shared switch communicates with the I2C of the FL7102 control chip, the CC channel of the FL7102 control chip of the downstream interface is switched to the CC channel of the FL7102 control chip controlled by the upstream USB-C interface 1 and USB-C interface 2, and the upstream / downstream CC channels of the shared switch are connected. After the shared switch's upstream / downstream CC channels are connected, the FL7102 control chip controlled by the downstream interface passes the PD adapter's information through and begins to broadcast the charging capability (Source Cap) upstream. The FL7102 control chip controlled by the upstream interface then calculates the PD pre-withheld power and begins charging the Host and supplying power to PD / HUB7 (shared switch). When a switching event occurs in the shared switch's upstream channel (the working interface switches from USB-C port 1 to USB-C port 2 to USB-C port 2 to USB-C port 1), the shared switch's control processor communicates with the FL7102 control chip controlled by the upstream / downstream interface via I2C to switch data and power, and convert all working modes through interfaces.When the shared switch is working normally, the downstream PD adapter is removed and the power supply needs to be Power Swap. The downstream interface FL7102 control chip reports the PD adapter removal event to the shared switch control processor through I2C, and the control processor reports to the upstream interface FL7102 control chip, so that the shared switch power supply is converted from PD power supply to Vbus power supply of the intelligent system host, and the shared switch works uninterruptedly during the whole process, and vice versa. In addition, when the shared switch is working on USB-C interface 1 or USB-C interface 2 and an unplug event occurs (an intelligent system host is removed or connected), the FL7102 control chip controlled by the other USB-C interface will report the interface plug-in event to the control processor, so that the GPIO controlled by the FL7102 control chip of the USB-C interface that is not plugged in will not act on HUB / DP7, so that the operation of the shared switch is not affected.

[0038] The shared switch disclosed in the embodiment of the present application includes multiple upstream connection interfaces, at least one downstream connection interface, an upstream power supply control circuit, an external power supply connection interface, an external power supply control circuit, a driving power hub and a charging switch control circuit. The shared switch is used to establish a data communication connection between each downstream connection interface and an intelligent system host connected to the upstream connection interface, so as to enable the intelligent system host connected to the upstream connection interface to identify and load the computer input device and / or computer peripheral device connected to the downstream connection interface. Since the driving power hub obtains power from the intelligent system host and the external power supply to provide the shared switch with working power, the shared switch will not be unable to use peripherals due to insufficient power of the device, nor will the switching work be interrupted when the intelligent system host removes the connection, thereby improving the user experience.

[0039] The above specific examples are used to illustrate the present application, which is only used to help understand the present application and is not intended to limit the present application. For technicians in the technical field to which the present application belongs, they can also make some simple deductions, deformations or substitutions based on the ideas of the present application.

Claims

1. A power management circuit for a shared switch, characterized in that: It includes at least two uplink connection interfaces, at least one downlink connection interface, uplink power supply control circuits with the same number as the uplink connection interfaces, external power supply connection interfaces, external power supply control circuits, a driving power supply hub and a charging switch control circuit; Each of the uplink connection interfaces is used to connect to an intelligent system host having an independent operating system and outputting power to the uplink connection interface; Each of the uplink power management and control circuits is connected between one of the uplink connection interfaces and the driving power hub, and the uplink power management and control circuit is used to output the power input from the intelligent system host connected to the uplink connection interface to the driving power hub; The external power connection interface is used as an input interface of an external power supply; The external power supply control circuit is connected between the driving power supply hub and the external power supply connection interface, and is used to output the power input by the external power supply to the driving power supply hub; The charging switch control circuit is respectively connected to the external power supply control circuit and each of the uplink power supply control circuits; the external power supply control circuit is also used to output the power input from the external power supply to the charging switch control circuit, and the charging switch control circuit is also used to output the power input from the external power supply to the uplink connection interface through the uplink power supply control circuit, so as to reversely charge the intelligent system host connected to the uplink connection interface; The driving power hub is used to obtain power from the intelligent system host and the external power supply to provide working power for the shared switch; Each of the downstream connection interfaces is used to connect to a computer input device and / or a computer peripheral device; The shared switch is used to establish a data communication connection between each of the downstream connection interfaces and one of the intelligent system hosts connected to the upstream connection interface, so as to enable the intelligent system host connected to the upstream connection interface to identify and load the computer input device and / or computer peripheral device connected to the downstream connection interface.

2. The power management circuit according to claim 1, characterized in that: It also includes the same number of uplink electrical connection indication circuits as the uplink power supply control circuits, each of which is connected to an uplink power supply control circuit and is used to identify the working status of the uplink power supply control circuit providing power to the driving power hub or performing reverse charging on the intelligent system host.

3. The power management circuit according to claim 1, wherein: It also includes an external electrical connection indication circuit, which is connected to the external power supply control circuit and is used to identify the working state of the external power supply control circuit.

4. The power management circuit according to claim 1, wherein: The upstream connection interface, the downstream connection interface and / or the external power connection interface are USB-C interfaces.

5. The power management circuit according to claim 4, characterized in that: The uplink power supply control circuit and the external power supply control circuit respectively include a PD power supply fast charging control chip, and the PD power supply fast charging control chip supports the PD fast charging protocol.

6. The power management circuit according to claim 1, wherein: When the driving power hub obtains the power through the external power management and control circuit, the driving power hub is used to use only the power input by the external power supply to supply power to the shared switch.

7. The power management circuit according to claim 6, characterized in that: When the external power connection interface is not connected to the external power supply, the driving power hub is used to use the electric energy input by each upstream power control circuit as the power supply for the shared switch to ensure that the shared switch operates normally when the intelligent system host stops supplying power.

8. A shared switch, characterized in that: It comprises the power management circuit as described in any one of claims 1 to 7, wherein the intelligent system host comprises a computer, a mobile phone, an intelligent mobile terminal and / or a tablet computer.

9. The shared switch according to claim 8, wherein: It also includes a shell and a display module arranged on the shell, and the display module is used to identify the connection status of each of the uplink connection interfaces and / or each of the downlink connection interfaces.

10. The shared switch according to claim 9, wherein: The display module is also used to identify the charging and discharging status information of the upstream connection interface; the charging and discharging status information includes charging power information.

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