Power supply control circuit based on Type-C and Type-C switcher

Abstract

The utility model relates to the technical field of Type-C interfaces, and discloses a Type-C-based power supply control circuit and a Type-C switcher, the circuit comprises a control circuit, a charging and discharging circuit and a Type-C circuit, and the Type-C circuit comprises a Type-C input circuit and a Type-C output circuit. The control circuit controls the signal input device to charge the charging and discharging circuit through the Type-C input circuit, and / or controls the signal output device to charge the charging and discharging circuit through the Type-C output circuit. And the charging and discharging circuit is controlled to supply power to the control circuit. Visibly, by providing the power supply control circuit of the Type-C, when input / output equipment is connected, the equipment is directly controlled to supply power to the control circuit, so that the starting time of the Type-C can be shortened, the normal work of the Type-C switcher can be automatically realized, and the signal transmission efficiency can be improved.

Description

Technical Field

[0001] This utility model relates to the field of Type-C interface technology, and in particular to a power supply control circuit and a Type-C switch based on Type-C. Background Technology

[0002] Currently, Type-C switches can select between multiple data sources, allowing devices to connect to different USB devices or hosts. For example, on a laptop, data transfer objects can be switched between different external displays or storage devices.

[0003] However, in practice, it has been found that traditional Type-C switches typically require a power supply port. An external power source is connected to this port, and the Type-C switch is started and begins normal operation, such as signal transmission, under the influence of this power supply. This process is relatively inefficient. Therefore, proposing a new power supply scheme for Type-C switches is of paramount importance. Utility Model Content

[0004] This invention provides a power supply control circuit and a Type-C switch based on Type-C, which can shorten the startup time of the Type-C switch, automatically realize the normal operation of the Type-C switch, and help improve signal transmission efficiency.

[0005] To address the aforementioned technical problems, the first aspect of this utility model discloses a power supply control circuit based on Type-C. The circuit includes a control circuit, a charging / discharging circuit, and a Type-C circuit. The Type-C circuit includes a Type-C input circuit and a Type-C output circuit. The control circuit includes a signal control circuit, wherein:

[0006] The voltage input terminal of the charging / discharging circuit is electrically connected to the first voltage output terminal of the Type-C input circuit and the first voltage output terminal of the Type-C output circuit. The voltage input terminal of the signal control circuit is electrically connected to the second voltage output terminal of the Type-C input circuit and the second voltage output terminal of the Type-C output circuit. The signal input terminal of the signal control circuit is electrically connected to the signal output terminal of the Type-C input circuit. The signal output terminal of the signal control circuit is electrically connected to the signal input terminal of the Type-C output circuit. Both the signal input terminal and the voltage input terminal of the Type-C input circuit are used to electrically connect to a signal input device. The signal output terminal of the Type-C output circuit is used to electrically connect to a signal output device.

[0007] The signal control circuit is used to detect whether the target circuit is connected to the target device, and when the target circuit is detected to be connected to the target device, it triggers the control circuit to perform an operation to control the target device to charge the charging and discharging circuit, so that the charging and discharging circuit can supply power to the control circuit; wherein, when the target circuit is the Type-C input circuit, the target device is the signal input device, and when the target circuit is the Type-C output circuit, the target device is the signal output device.

[0008] As an optional implementation, in the first aspect of this utility model, the control circuit further includes a control chip, wherein:

[0009] The first voltage input terminal of the control chip is electrically connected to the voltage output terminal of the charging and discharging circuit; the second voltage input terminal of the control chip is electrically connected to the first voltage output terminal of the Type-C input circuit and the first voltage output terminal of the Type-C output circuit; the control terminal of the control chip is electrically connected to the enable terminal of the signal control circuit, the enable terminal of the Type-C input circuit, and the enable terminal of the Type-C output circuit; and the signal input terminal of the control chip is electrically connected to the signal output terminal of the signal control circuit.

[0010] The control chip is used to control the signal control circuit to perform the operation of detecting whether the target circuit is connected to the target device, and when it receives the detection result sent by the signal control circuit that the target circuit is connected to the target device, it controls the target device to charge the charging and discharging circuit; it is also used to control the charging and discharging circuit to supply power to the control chip.

[0011] As an optional implementation, in the first aspect of this utility model, the signal control circuit includes a CC signal switching circuit and a device access detection circuit, wherein:

[0012] The enable terminal of the CC signal switching circuit and the enable terminal of the device access detection circuit are both electrically connected to the control terminal of the control chip. The voltage input terminal of the CC signal switching circuit is electrically connected to the voltage output terminal of the Type-C input circuit and the second voltage output terminal of the Type-C output circuit. The signal input terminal of the CC signal switching circuit is electrically connected to the signal output terminal of the Type-C input circuit. The first signal output terminal of the CC signal switching circuit is electrically connected to the signal input terminal of the Type-C output circuit. The second signal output terminal of the CC signal switching circuit is electrically connected to the signal input terminal of the device access detection circuit. The signal output terminal of the device access detection circuit is electrically connected to the signal input terminal of the control chip.

[0013] The CC signal switching circuit is used, under the control of the control chip, to switch the first CC signal output by the signal input device through the Type-C input circuit to obtain a second CC signal, and to transmit the second CC signal to the signal output device through the Type-C output circuit.

[0014] The device access detection circuit is used to output a corresponding voltage signal to the control chip based on the pulse signal received from the control chip, so as to trigger the control chip to detect whether the Type-C input circuit is connected to the signal input device and / or whether the Type-C output circuit is connected to the signal output device based on the voltage signal.

[0015] As an optional implementation, in the first aspect of this utility model, the Type-C input circuit includes a Type-C input interface and a first charging control circuit, wherein:

[0016] The first voltage output terminal of the Type-C input interface is electrically connected to the voltage input terminal of the first charging control circuit and the voltage input terminal of the CC signal switching circuit of the control circuit. The second voltage output terminal of the Type-C input interface is electrically connected to the voltage input terminal of the charging and discharging circuit and the voltage input terminal of the Type-C output circuit. The voltage output terminal of the first charging control circuit is electrically connected to the second voltage input terminal of the control chip of the control circuit. The enable terminal of the Type-C input interface and the enable terminal of the first charging control circuit are both electrically connected to the control terminal of the control circuit. The signal output terminal of the Type-C input interface is electrically connected to the signal input terminal of the first charging control circuit and the signal input terminal of the signal control circuit. The signal input terminal and the voltage input terminal of the Type-C input interface are both used to electrically connect to the signal input device.

[0017] The first charging control circuit is used to control the signal input device to charge the charging and discharging circuit through the Type-C input interface.

[0018] As an optional implementation, in the first aspect of this utility model, the first charging control circuit includes a VBUS voltage detection module and a CC deception module, wherein:

[0019] The voltage output terminal of the VBUS voltage detection module and the voltage output terminal of the CC decoy module are electrically connected to the second voltage input terminal of the control chip. The voltage input terminal of the VBUS voltage detection module is electrically connected to the first voltage output terminal of the Type-C input interface. The enable terminals of the VBUS voltage detection module and the CC decoy module are both electrically connected to the control terminal of the control circuit. The signal input terminal of the CC decoy module is electrically connected to the signal output terminal of the Type-C input interface.

[0020] The CC decoy module is used to control the signal input device to output VBUS voltage through the Type-C input interface and provide the VBUS voltage to the charging and discharging circuit;

[0021] The VBUS voltage detection module is used to power the control chip when the Type-C input interface is connected to the signal input device, so as to start the control chip; and to send the voltage information detected by the VBUS voltage detection circuit to the control chip.

[0022] As an optional implementation, in the first aspect of this utility model, the Type-C output circuit includes a Type-C output interface and a second charging control circuit, wherein:

[0023] The voltage input terminal of the Type-C output interface is electrically connected to the second voltage output terminal of the Type-C input interface. The first voltage output terminal of the Type-C output interface is electrically connected to the voltage input terminal of the second charging control circuit and the voltage input terminal of the CC signal switching circuit of the control circuit. The second voltage output terminal of the Type-C output interface is electrically connected to the voltage input terminal of the charging and discharging circuit. The voltage output terminal of the second charging control circuit is electrically connected to the second voltage input terminal of the control chip. The enable terminal of the Type-C output interface and the enable terminal of the second charging control circuit are both electrically connected to the control terminal of the control chip of the control circuit. The signal input terminal of the Type-C output interface and the signal input terminal of the second charging control circuit are electrically connected to the signal output terminal of the signal control circuit. The signal output terminal of the Type-C output interface is used to electrically connect to the signal output device.

[0024] The second charging control circuit is used to control the signal output device to charge the charging and discharging circuit through the Type-C output interface.

[0025] As an optional implementation, in the first aspect of this invention, the Type-C circuit further includes a voltage switching circuit, wherein:

[0026] The enable terminal of the voltage switching circuit is electrically connected to the control terminal of the control chip, the voltage input terminal of the voltage switching circuit is electrically connected to the second voltage output terminal of the Type-C input interface, and the voltage output terminal of the voltage switching circuit is electrically connected to the voltage input terminal of the Type-C output interface.

[0027] The voltage switching circuit is used to switch the first VBUS voltage provided by the Type-C input circuit to a second VBUS voltage for supplying to the Type-C output circuit; or, to switch the second VBUS voltage provided by the Type-C output circuit to a first VBUS voltage for supplying to the Type-C input circuit.

[0028] As an optional implementation, in the first aspect of this invention, the number of Type-C input circuits is greater than a certain value, and each of the Type-C input circuits is connected in parallel with each other; and / or,

[0029] The number of Type-C output circuits is greater than 1, and each of the Type-C output circuits is connected in parallel with each other.

[0030] As an optional implementation, in the first aspect of this utility model, the charging and discharging circuit includes a voltage control module and a supercapacitor module, wherein:

[0031] The voltage input terminal of the voltage control module is electrically connected to the second voltage output terminal of the Type-C input interface in the Type-C input circuit and the second voltage output terminal of the Type-C output interface in the Type-C output circuit. The voltage output terminal of the voltage control module is electrically connected to the first voltage input terminal of the supercapacitor module and the control chip of the control circuit.

[0032] The voltage control module is used to process the VBUS voltage received from the Type-C input circuit and / or the Type-C output circuit to obtain a power supply voltage, and to provide the power supply voltage to the supercapacitor module and the control circuit.

[0033] The second aspect of this utility model discloses an electronic device, which includes a Type-C-based power supply control circuit as described in the first aspect of this utility model.

[0034] Implementing this utility model has the following beneficial effects:

[0035] This invention provides a Type-C-based power supply control circuit. The circuit includes a control circuit, a charging / discharging circuit, and a Type-C circuit. The Type-C circuit includes a Type-C input circuit and a Type-C output circuit. The voltage input terminal of the charging / discharging circuit is electrically connected to the voltage output terminals of the Type-C input circuit and the Type-C output circuit. The voltage output terminal of the charging / discharging circuit is electrically connected to the voltage input terminal of the control circuit. The enable terminals of both the Type-C input circuit and the Type-C output circuit are electrically connected to the control terminal of the control circuit. The signal output of the Type-C input circuit... The signal input terminal of the control circuit is electrically connected to the signal input terminal of the Type-C output circuit, and the signal output terminal of the control circuit is electrically connected to the signal input terminal of the Type-C output circuit. Both the signal input terminal and voltage input terminal of the Type-C input circuit are used to electrically connect to signal input devices, and the signal output terminal of the Type-C output circuit is used to electrically connect to signal output devices. The control circuit is used to control the signal input device to charge the charging / discharging circuit through the Type-C input circuit, and / or to control the signal output device to charge the charging / discharging circuit through the Type-C output circuit; it is also used to control the charging / discharging circuit to supply power to the control circuit. Therefore, this invention, by providing a Type-C power supply control circuit, directly controls the device to supply power to the control circuit when an input / output device is connected, which can shorten the Type-C startup time, automatically achieve normal operation of the Type-C switch, and improve signal transmission efficiency. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a schematic diagram of a power supply control circuit based on Type-C disclosed in an embodiment of this utility model;

[0038] Figure 2 This is a schematic diagram of the structure of a control circuit disclosed in an embodiment of this utility model;

[0039] Figure 3 This is a schematic diagram of the structure of a control chip disclosed in an embodiment of this utility model;

[0040] Figure 4This is a schematic diagram of the structure of a CC signal switching circuit disclosed in an embodiment of the present invention;

[0041] Figure 5 This is a schematic diagram of the structure of a device access detection circuit disclosed in an embodiment of this utility model;

[0042] Figure 6 This is a schematic diagram of the structure of a Type-C input circuit disclosed in an embodiment of this utility model;

[0043] Figure 7 This is a schematic diagram of another Type-C input circuit disclosed in an embodiment of this utility model;

[0044] Figure 8 This is a schematic diagram of the structure of a TMDS signal switching circuit disclosed in an embodiment of the present invention;

[0045] Figure 9 This is a schematic diagram of the structure of a USBHP signal switching circuit disclosed in an embodiment of this utility model;

[0046] Figure 10 This is a schematic diagram of the structure of a signal enhancement circuit disclosed in an embodiment of this utility model;

[0047] Figure 11 This is a schematic diagram of the structure of a Type-C output interface disclosed in an embodiment of this utility model;

[0048] Figure 12 This is a schematic diagram of the structure of a second charging control circuit disclosed in an embodiment of the present utility model;

[0049] Figure 13 This is a schematic diagram of the structure of a voltage switching circuit disclosed in an embodiment of this utility model;

[0050] Figure 14 This is a schematic diagram of the structure of a charging and discharging circuit disclosed in an embodiment of this utility model;

[0051] Figure 15 This is a schematic diagram of the overall circuit framework of a Type-C-based power supply control circuit disclosed in an embodiment of this utility model;

[0052] Figure 16 This is a schematic diagram of the structure of a Type-C switch disclosed in an embodiment of this utility model. Detailed Implementation

[0053] To better understand and implement this invention, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0054] It should be noted that, unless otherwise expressly specified and limited, the term "electrical connection" in the specification, claims, and accompanying drawings of this utility model should be interpreted broadly. For example, it can be a fixed electrical connection, a detachable electrical connection, or an integral electrical connection; it can be a mechanical electrical connection, an electrical-electrical connection, or a connection that allows for communication; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two elements or an interaction between two elements. Furthermore, the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish different objects, not to describe a specific order. The terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0055] Example 1

[0056] Please see Figure 1 , Figure 1 This is a schematic diagram of a power supply control circuit based on Type-C disclosed in an embodiment of this utility model. Wherein, Figure 1 The described Type-C-based power supply control circuit can be applied to Type-C switches, and this embodiment of the invention is not limited thereto. Figure 1 As shown, the Type-C-based power supply control circuit includes a control circuit 101, a charging / discharging circuit 102, and a Type-C circuit 103. The Type-C circuit 103 includes a Type-C input circuit 1031 and a Type-C output circuit 1032. The control circuit 101 includes a signal control circuit 1011.

[0057] The voltage input terminal of the charging / discharging circuit 102 is electrically connected to the first voltage output terminal of the Type-C input circuit 1031 and the first voltage output terminal of the Type-C output circuit 1032. The voltage input terminal of the signal control circuit 1011 is electrically connected to the second voltage output terminal of the Type-C input circuit 1031 and the second voltage output terminal of the Type-C output circuit 1032. The signal input terminal of the signal control circuit 1011 is electrically connected to the signal output terminal of the Type-C input circuit 1031. The signal output terminal of the signal control circuit 1011 is electrically connected to the signal input terminal of the Type-C output circuit 1032. Both the signal input terminal and the voltage input terminal of the Type-C input circuit 1031 are used to electrically connect to signal input devices. The signal output terminal of the Type-C output circuit 1032 is used to electrically connect to signal output devices. The signal control circuit 1011 is used to detect whether the target circuit is connected to the target device; and when the target circuit is detected to be connected to the target device, it triggers the control circuit 101 to perform the operation of controlling the target device to charge the charging and discharging circuit, so that the charging and discharging circuit 102 can supply power to the control circuit 101. Specifically, when the target circuit is a Type-C input circuit 1031, the target device is a signal input device; when the target circuit is a Type-C output circuit 1032, the target device is a signal output device.

[0058] Specifically, when the Type-C input circuit 1031 is connected to a signal input device, the control circuit 101 controls the Type-C input circuit 1031 to induce the voltage output by the signal input device to flow to the charging and discharging circuit 102, thereby enabling the signal input device to charge the charging and discharging circuit 102. When the Type-C output circuit 1032 is connected to a signal output device, the control circuit 101 controls the Type-C output circuit 1032 to induce the voltage output by the signal output device to flow to the charging and discharging circuit 102, thereby enabling the signal output device to charge the charging and discharging circuit 102. When both the Type-C input circuit 1031 and the Type-C output circuit 1032 are connected to the signal output device, the control circuit 101 controls the charging and discharging circuit 102 to supply power to the control circuit 101, thereby enabling the control circuit 101 to operate normally, such as transmitting signals between the signal input device and the signal output device, switching the signals of the signal input device and / or the signal output device, switching the signal input device to the signal output device, and switching the signal output device to the signal input device. For example, the signal input device can be a computer, tablet, or other computer device, and the signal output device can be a printer, monitor, or other device. Optionally, the number of Type-C input circuits 1031 is greater than one, and each Type-C input circuit 1031 is connected in parallel with each other; and / or, the number of Type-C output circuits 1032 is greater than one, and each Type-C output circuit 1032 is connected in parallel with each other. By providing a circuit capable of selecting multiple Type-C input circuits 1031 and / or multiple Type-C output circuits 1032, it is advantageous to select an appropriate number of Type-C circuits 103 according to the actual situation of the signal transmission device, thereby improving the applicability of the circuit.

[0059] It is evident that implementation Figure 1 The described Type-C-based power supply control circuit uses a signal control circuit 1011 to detect whether the target circuit is connected to the target device. When the target circuit is detected to be connected to the target device, the control circuit 101 is triggered to control the target device to charge the charging and discharging circuit, so that the charging and discharging circuit 102 can supply power to the control circuit 101. When the target circuit is a Type-C input circuit 1031, the target device is a signal input device; when the target circuit is a Type-C output circuit 1032, the target device is a signal output device. That is, this solution provides a simple and easy-to-implement circuit that can directly control the input / output device to charge the charging and discharging circuit 102 when the input / output device is connected, so that the charging and discharging circuit 102 can directly supply power to the control circuit 101. This can shorten the startup time of the Type-C switch, automatically realize the normal operation of the Type-C switch, and improve signal transmission efficiency.

[0060] In an optional embodiment, such as Figure 2 As shown, Figure 2 This is a schematic diagram of a control circuit disclosed in an embodiment of the present invention, wherein the control circuit 101 includes a signal control circuit 1011, such as... Figure 2 As shown, where:

[0061] The control circuit 101 also includes a control chip 1012. The first voltage input terminal of the control chip 1012 is electrically connected to the voltage output terminal of the charging / discharging circuit 102. The second voltage input terminal of the control chip 1012 is electrically connected to the first voltage output terminals of the Type-C input circuit 1031 and the Type-C output circuit 1032. The control terminal of the control chip 1012 is electrically connected to the enable terminals of the signal control circuit 1011, the Type-C input circuit 1031, and the Type-C output circuit 1032. The signal input terminal of the control chip 1012 is electrically connected to the signal output terminal of the signal control circuit 1011. The control chip 1012 is used to control the signal control circuit 1011 to perform the aforementioned operation of detecting whether the target circuit is connected to the target device. When it receives the detection result from the signal control circuit 1011 indicating that the target circuit is connected to the target device, it controls the target device to charge the charging / discharging circuit 102. It is also used to control the charging / discharging circuit 102 to supply power to the control chip. Specifically, for the Type-C input circuit 1031 and the signal input device, the control chip 1012 controls the signal control circuit 1011 to detect whether the Type-C input circuit 1031 is connected to the signal input device. When the Type-C input circuit 1031 is detected to be connected to the signal input device, the control signal control circuit 1011 charges the charging and discharging circuit 102 through the Type-C input circuit 1031. For the Type-C output circuit 1032 and the signal output device, the control chip 1012 controls the signal control circuit 1011 to detect whether the Type-C output circuit 1032 is connected to the signal output device. When the Type-C output circuit 1032 is detected to be connected to the signal output device, the control signal control circuit 1011 charges the charging and discharging circuit 102 through the Type-C output circuit 1032. Figure 3 As shown, Figure 3 This is a schematic diagram of the structure of a control chip disclosed in an embodiment of this utility model. Figure 3 Taking the 1012 control chip as an example, this is an example of an MCU.

[0062] In this optional embodiment, such as Figure 2 As shown, the signal control circuit 1011 includes a CC signal switching circuit 10111 and a device access detection circuit 10112, such as... Figure 4 As shown, Figure 4This is a schematic diagram of the structure of a CC signal switching circuit disclosed in an embodiment of this utility model, as shown below. Figure 5 As shown, Figure 5 This is a schematic diagram of a device access detection circuit disclosed in an embodiment of the present utility model, wherein:

[0063] The enable pin of the CC signal switching circuit 10111 (e.g.) Figure 4 The enable pins of the SEL1, BL_OE, and BLSW_OE shown in the diagram and the device access detection circuit 10112 (as shown in the diagram) are also included. Figure 5 The CC_PWM signals shown are all electrically connected to the control terminal of the control chip 1012 and the voltage input terminal of the CC signal switching circuit 10111 (as shown). Figure 4 The BUS_5V signal is electrically connected to the voltage output terminal of the Type-C input circuit 1031 and the second voltage output terminal of the Type-C output circuit 1032, and the signal input terminal of the CC signal switching circuit 10111 (as shown). Figure 4 CC1_A, CC_1B, CC2_A, and CC_2B shown are electrically connected to the signal output terminal of the Type-C input circuit 1031, and the first signal output terminal of the CC signal switching circuit 10111 (as shown). Figure 4 CC1 and CC2 (shown) are electrically connected to the signal input terminals of the Type-C output circuit 1032 and the second signal output terminal of the CC signal switching circuit 10111 (as shown). Figure 4 The CC1_N and CC2_N shown are electrically connected to the signal input terminals of the detection circuit 10112, and the device is connected to the signal output terminals of the detection circuit 10112 (as shown). Figure 5 The CC1_MCU and CC2_MCU shown are electrically connected to the signal input terminals of the control chip 1012. The CC signal switching circuit 10111, under the control of the control chip 1012, switches the first CC signal output by the signal input device through the Type-C input circuit 1031 to obtain a second CC signal, and transmits the second CC signal to the signal output device through the Type-C output circuit 1032. The device access detection circuit 10112, based on the received pulse signal output by the control chip 1012, outputs a corresponding voltage signal to the control chip 1012 to trigger the control chip 1012 to detect whether the Type-C input circuit 1031 is connected to the signal input device and / or whether the Type-C output circuit 1032 is connected to the signal output device. The CC signal switching circuit 10111 enables independent CC signals for each port by switching and turning off U19 and U20, and then... Figure 5 The PWM output is given to CC. Figure 5The device access detection circuit 10112 in the middle is used as the interface opposite to Type-C to determine whether a device is connected to the circuit, such as whether a signal input device is connected to the Type-C input circuit 1031, and / or whether a signal output device is connected to the Type-C output circuit 1032. The CC_PWM circuit outputs a PWM waveform and distributes it to CC1 and CC2. When a device is connected, according to the USB 3.0 protocol, the output PWM waveform will be interfered with. The MCU detects the voltage change through the ADC and will turn on the PWM signal. Figure 4 The CC signal switching circuit 10111 shown enables communication between the uplink and downlink devices via CC signal switching. Once successful, the charging / discharging circuit 102 supplies power to the entire control circuit 101. Thus, under the control of the control chip 1012 (such as an MCU), the CC signal switching circuit 10111 switches the first CC signal output from the Type-C input circuit 1031 of the signal input device to obtain a second CC signal. This second CC signal is then transmitted to the signal output device via the Type-C output circuit 1032. The CC signal switching circuit 10111 enables independent control of each port of the input / output circuit. Furthermore, under the control of the control chip 1012, the device access detection circuit 10112 outputs a corresponding voltage signal to the control chip based on the received pulse signal (PWM signal) output by the control chip 1012. Chip 1012 triggers the control chip 1012 to detect whether the Type-C input circuit 1031 is connected to a signal input device and / or whether the Type-C output circuit 1032 is connected to a signal output device based on the voltage signal. The device connection detection circuit 10112 can improve the detection accuracy of whether the corresponding Type-C circuit 103 is connected to the target device. Only when the target device is detected is the target device controlled to charge the charging and discharging circuit 102. This can improve the charging control accuracy of the charging and discharging circuit 102 by the signal input device / signal output device, thereby improving the accuracy of subsequent power supply to the control chip 1012 through the charging and discharging circuit 102.

[0064] In another alternative embodiment, such as Figure 6 As shown, Figure 6 This is a schematic diagram of the structure of a Type-C input circuit disclosed in an embodiment of this utility model. Figure 6 The Type-C input circuit 1031 shown is an example of at least one Type-C input circuit 1031 labeled as Type-C A, such as... Figure 6 As shown, where:

[0065] The Type-C input circuit 1031 includes a Type-C input interface 10311 and a first charging control circuit 10312, wherein the first voltage output terminal of the Type-C input interface 10311 is electrically connected to the voltage input terminal of the first charging control circuit 10312 (e.g., ...). Figure 6 The voltage input terminals of the BUS_5V and the CC signal switching circuit 10111 of the control circuit 101 (as shown) Figure 4 The second voltage output terminal of the Type-C input interface 10311 (as shown in BUS_5V) is... Figure 6 The VBUS_C_A shown is electrically connected to the voltage input terminal of the charging / discharging circuit 102 and the voltage input terminal of the Type-C output circuit 1032, and the voltage output terminal of the first charging control circuit 10312 (as shown). Figure 6 The VBUS_C_A) shown is electrically connected to the second voltage input terminal of the control chip 1012 of the control circuit 101, and the enable terminal of the Type-C input interface 10311 (as shown). Figure 6 The DOWN_POWERA and A_CHARGE shown) and the enable terminal of the first charging control circuit 10312 (as shown) Figure 6 The UP_VBUS_DTA and CCA_YP shown are both electrically connected to the control terminal of the control circuit 101 and the signal output terminal of the Type-C input interface 10311 (e.g., UP_VBUS_DTA and CCA_YP). Figure 6 CC1_A and CC1_B shown are electrically connected to the signal input terminals of the first charging control circuit 10312 and the signal input terminal of the signal control circuit 1011. The signal input terminal and voltage input terminal of the Type-C input interface 10311 are both used to electrically connect to the signal input device. The first charging control circuit 10312 is used to control the signal input device to charge the charging and discharging circuit 102 through the Type-C input interface 10311.

[0066] In this optional embodiment, as an optional implementation method, such as Figure 6 As shown, where:

[0067] The first charging control circuit 10312 includes a VBUS voltage detection module 103121 and a CC decoy module 103122, wherein the voltage output terminal of the VBUS voltage detection module 103121 (e.g., Figure 6 The voltage output terminals of the UP_3V3 and CC decoy module 103122 shown (as shown) Figure 6 The BUS_5V terminal shown is electrically connected to the second voltage input terminal of the control chip 1012, and the voltage input terminal of the VBUS voltage detection module 103121 (as shown). Figure 6The VBUS_C_A shown is electrically connected to the first voltage output terminal of the Type-C input interface 10311, and the enable terminal of the VBUS voltage detection module 103121 (as shown). Figure 6 The enable pins of the UP_VBUS_DTA and CC decoy module 103122 shown (e.g., UP_VBUS_DTA) and CC decoy module 103122 are shown. Figure 6 The CCA_YP shown is electrically connected to the control terminal of the control circuit 101 and the signal input terminal of the CC decoy module 103122 (e.g., ...). Figure 6 CC1_A and CC1_B shown are electrically connected to the signal output terminals of the Type-C input interface 10311. The CC decoy module 103122 is used to control the signal input device to output VBUS voltage through the Type-C input interface 10311 and provide the VBUS voltage to the charging and discharging circuit 102; the VBUS voltage detection module 103121 is used to power the control chip 1012 to start the control chip 1012 when the Type-C input interface 10311 is connected to the signal input device; and to send the voltage information detected by the VBUS voltage detection circuit to the control chip 1012. In this configuration, the first switching device Q36 of the CC decoy module 103122 is in the default on state upon power-up, so the second switching device Q11 is in the off state upon power-up. The off state of the second switching device Q11 causes CC1 and CC2 to be pulled low to R420 upon power-up. For example, the resistance value of R420 can be 5.1kΩ. According to the protocol, pulling CC down to 5.1KΩ will cause the uplink or downlink device to output a 5V VBUS voltage. That is, at this time, the signal input device connected to the Type-C A input circuit will output a VBUS_C_A voltage, which is provided to the charging / discharging circuit 102 to charge it. Subsequently, the VBUS voltage detection module 103121 is activated. When VBUS... Once the voltage input terminal of the voltage detection module is powered, the VBUS voltage of the voltage input terminal is provided to the control chip 1012 to enable normal power supply to the control chip 1012 and start the control chip 1012. After the control chip 1012 starts, it can know through the VBUS voltage detection module 103121 that the Type-C interface has a corresponding device connected.

[0068] In this optional embodiment, optionally, such as Figure 7 As shown, Figure 7 This is a schematic diagram of another Type-C input circuit disclosed in an embodiment of this utility model. Figure 7The Type-C input circuit 1031 shown is an example of at least one Type-C input circuit 1031 labeled as Type-C B. For a detailed description of the Type-C B input circuit, please refer to the detailed description of the Type-C A input circuit. This embodiment of the present invention will not repeat the details.

[0069] In this optional embodiment, a signal transmission circuit may be provided in the Type-C input circuit 1031 and the Type-C output circuit 1032. The signal transmission circuit may include a TMDS signal switching circuit, a USBHP signal switching circuit, and a signal enhancement circuit. Specifically, the TMDS signal switching circuit is used to switch the TMDS signal transmitted between the Type-C input circuit 1031 and the Type-C output circuit 1032; the USBHP signal switching circuit is used to switch the USBHP signal transmitted between the Type-C input circuit 1031 and the Type-C output circuit 1032; and the signal enhancement circuit is used to enhance the signal strength of the signal transmitted between the Type-C input circuit 1031 and the Type-C output circuit 1032. Figure 8 As shown, Figure 8 This is a schematic diagram of the structure of a TMDS signal switching circuit disclosed in an embodiment of this utility model, as shown below. Figure 9 As shown, Figure 9 This is a schematic diagram of the structure of a USBHP signal switching circuit disclosed in an embodiment of this utility model, as shown below. Figure 10 As shown, Figure 10 This is a schematic diagram of the structure of a signal enhancement circuit disclosed in an embodiment of this utility model.

[0070] As can be seen, this optional embodiment controls the signal input device to output VBUS voltage through the Type-C input interface 10311 via the CC decoy module 103122, and provides the VBUS voltage to the charging and discharging circuit 102; and when the Type-C input interface 10311 is connected to the signal input device, the VBUS voltage detection module 103121 supplies power to the control chip 1012 to start the control chip 1012, and sends the voltage information detected by the VBUS voltage detection circuit to the control chip 1012. This solution utilizes the Type-C switch's Type... The e-C interface is equipped with a CC decoy module 103122 and a VBUS voltage detection module 103121, which can decoy the voltage of signal transmission devices (such as signal input devices and signal output devices) into the charging and discharging circuit 102 of the Type-C switch. The Type-C switch can be powered without an external power supply, which helps to shorten the time required to power the Type-C switch, thereby improving the power-on efficiency of the Type-C switch and thus improving the signal processing efficiency such as signal switching and transmission achieved through the Type-C switch.

[0071] In another optional embodiment, the Type-C output circuit 1032 includes a Type-C output interface 10321 and a second charging control circuit 10322. The voltage input terminal of the Type-C output interface 10321 is electrically connected to the second voltage output terminal of the Type-C input interface 10311. The first voltage output terminal of the Type-C output interface 10321 is electrically connected to the voltage input terminal of the second charging control circuit 10322 and the voltage input terminal of the CC signal switching circuit 10111 of the control circuit 101. The second voltage output terminal of the Type-C output interface 10321 is electrically connected to... The voltage input terminal of the charging / discharging circuit 102 and the voltage output terminal of the second charging control circuit 10322 are electrically connected to the second voltage input terminal of the control chip 1012. The enable terminals of the Type-C output interface 10321 and the second charging control circuit 10322 are both electrically connected to the control terminals of the control chip 1012 in the control circuit 101. The signal input terminals of the Type-C output interface 10321 and the second charging control circuit 10322 are electrically connected to the signal output terminal of the signal control circuit 1011. The signal output terminal of the Type-C output interface 10321 is used to electrically connect to a signal output device. The second charging control circuit 10322 is used to control the signal output device to charge the charging / discharging circuit 102 through the Type-C output interface 10321. Figure 11 As shown, Figure 11 This is a schematic diagram of the structure of a Type-C output interface disclosed in an embodiment of this utility model. Figure 11The Type-C output circuit 1032 corresponding to the Type-C output interface 10321 shown is an example of at least one Type-C output circuit 1032 marked as Type-C C, such as... Figure 12 As shown, Figure 12 This is a schematic diagram of the structure of a second charging control circuit disclosed in an embodiment of the present invention. Figure 12 The Type-C output circuit 1032 corresponding to the second charging control circuit 1032 shown is also an example of at least one Type-C output circuit 1032 marked as Type-C C. For a detailed description of the Type-C output circuit 1032, please refer to the detailed description of the Type-C input circuit 1031 above; this embodiment of the invention will not repeat it here.

[0072] In this optional embodiment, as an optional implementation, the Type-C circuit 103 further includes a voltage switching circuit 1033, such as... Figure 13 As shown, Figure 13 This is a schematic diagram of a voltage switching circuit disclosed in an embodiment of the present invention, wherein:

[0073] The enable terminal of the voltage switching circuit 1033 is electrically connected to the control terminal of the control chip 1012, the voltage input terminal of the voltage switching circuit 1033 is electrically connected to the second voltage output terminal of the Type-C input interface 10311, and the voltage output terminal of the voltage switching circuit 1033 is electrically connected to the voltage input terminal of the Type-C output interface 10321. The voltage switching circuit 1033 is used to switch the first VBUS voltage provided by the Type-C input circuit 1031 to obtain a second VBUS voltage for supplying to the Type-C output circuit 1032; or, to switch the second VBUS voltage provided by the Type-C output circuit 1032 to obtain a first VBUS voltage for supplying to the Type-C input circuit 1031. By providing a Type-C input circuit 1031, a Type-C output circuit 1032, and a voltage switching circuit 1033 between the Type-C input interface 10311 and the Type-C output interface 10321, when the corresponding signal transmission device is tricked into outputting VBUS voltage through the CC decoy module 103122 corresponding to one of the interfaces, the VBUS voltage can be provided to the remaining interfaces through the voltage switching circuit 1033. The voltage switching circuit 1033 can accurately control the power supply of the two interfaces, which is beneficial to improving the power-on efficiency of the Type-C switch to a certain extent.

[0074] In yet another alternative embodiment, such as Figure 14 As shown, Figure 14This is a schematic diagram of a charging and discharging circuit disclosed in an embodiment of this utility model, as shown below. Figure 14 As shown, where:

[0075] The charging and discharging circuit 102 includes a voltage control module 1021 and a supercapacitor module 1022. The voltage input terminal of the voltage control module 1021 is electrically connected to the second voltage output terminal of the Type-C input interface 10311 in the Type-C input circuit 1031 and the second voltage output terminal of the Type-C output interface 10321 in the Type-C output circuit 1032. The voltage output terminal of the voltage control module 1021 is electrically connected to the first voltage input terminal of the control chip 1012 of the supercapacitor module 1022 and the control circuit 101. The voltage control module 1021 is used to control the VBUS voltage (e.g., VBUS voltage) received from the Type-C input circuit 1031 and / or the Type-C output circuit 1032. Figure 14 The VBUS_C_A, VBUS_C_B, and VBUS_C shown are processed to obtain the supply voltage (e.g., Figure 14 The voltage is VBUS_3.6V (as shown), and the supply voltage is provided to the supercapacitor module 1022 and the control circuit 101. In this way, by setting the voltage control module 1021 and the supercapacitor module 1022, the VBUS voltage induced by the input interface and / or output interface can be stored for use by the circuit, which helps to improve the charging efficiency of the circuit.

[0076] For example, such as Figure 15 As shown, Figure 15 This is a schematic diagram of the overall circuit framework of a Type-C-based power supply control circuit disclosed in an embodiment of this utility model. Figure 15 Therefore, a Type-C switch contains two Type-C input interfaces 10311 (e.g.) Figure 15 (as shown in Type-C A and Type-C B) and a Type-C output interface 10321 (e.g.) Figure 15 Taking the Type-C (C) shown as an example, Figure 15 SWITCH① in this context refers to Figure 4 The signal switching module containing U20 in the CC signal switching circuit 10111 shown is... Figure 15 SWITCH② in the text refers to Figure 4 The signal switching module containing U19 in the CC signal switching circuit 10111 shown is... Figure 15 SWITCH③ in the text refers to Figure 8 The TMDS signal switching circuit shown is... Figure 15 SWITCH④ in the text refers to Figure 9 The USBHP signal switching circuit shown is optional. Figure 15The overall circuit framework shown may also include a Type-C power supply port, which is used to supply the MCU with the power supply voltage output from the external power supply through the Type-C power supply port when the power in the supercapacitor module 1022 contained in the power supply control circuit is insufficient to provide the MCU with normal operation.

[0077] The working principle of the power supply control circuit based on Type-C in this embodiment of the invention is as follows:

[0078] In this embodiment of the present invention, when any Type-C circuit 103 is powered on, for example, when the Type-C A input circuit is powered on, the first switching device Q36 in its CC decoy module 103122 is in the default open state, so the second switching device Q11 is in the closed state. The closing of the second switching device Q11 will cause CC1 and CC2 to be pulled low to R420 when powered on, for example, pulled low to 5.1kΩ. According to the protocol, the CC being pulled down to 5.1KΩ will cause the uplink or downlink device to output a 5V VBUS voltage. That is, at this time, the signal input device connected to the Type-C A input circuit will output a VBUS_C_A voltage. At this time, the VBUS_C_A voltage is provided to the charging and discharging circuit 102 by the control chip 1012 (such as MCU) to charge the charging and discharging circuit 102. Then, the function of the VBUS voltage detection module 103121 is entered, wherein when VBUS After the voltage input terminal of the voltage detection module is powered, the VBUS voltage of the voltage input terminal is provided to the control chip 1012 to enable normal power supply to the control chip 1012 and start the control chip 1012. After the control chip 1012 starts, it knows through the VBUS voltage detection module 103121 that the Type-C interface has a corresponding device connected. In addition, the control chip 1012 controls the CC_PWM circuit to output a PWM waveform to the CC signal switching circuit 10111. When a device is connected, according to the USB 3.0 protocol, the output PWM waveform will be interfered with. The control chip 1012 detects the voltage change through the ADC and opens the CC signal switching circuit 10111. By switching U19 and U20 on and off, the CC of each interface can be transmitted independently, realizing the CC connection and communication between the uplink and downlink devices. Then the control chip 1012 controls the supercapacitor module 1022 to output the corresponding power supply voltage to power the entire control circuit 101. As can be seen, this solution uses the control circuit 101 to control the signal input device to charge the charging / discharging circuit 102 through the Type-C input circuit 1031, and / or the control signal output device to charge the charging / discharging circuit 102 through the Type-C output circuit 1032, and controls the charging / discharging circuit 102 to supply power to the control circuit 101. In other words, this solution provides a simple and easy-to-implement circuit that can directly control the input / output device to supply power to the control circuit 101 when the input / output device is connected, which can shorten the startup time of the Type-C switch, automatically realize the normal operation of the Type-C switch, and improve signal transmission efficiency.

[0079] Example 2

[0080] Please see Figure 16 , Figure 16 This is a schematic diagram of the structure of a Type-C switch disclosed in an embodiment of this utility model. Figure 2 The described Type-C switch includes any of the Type-C-based power supply control circuits as shown in Embodiment 1. It should be noted that for a detailed description of the Type-C-based power supply control circuit, please refer to the specific description in Embodiment 1; this embodiment will not repeat it.

[0081] It is evident that implementation Figure 16 The described Type-C switch can be controlled by a control circuit to charge the charging / discharging circuit through the Type-C input circuit, and / or to charge the charging / discharging circuit through the Type-C output circuit, and to supply power to the control circuit. In other words, this solution provides a simple and easy-to-implement circuit that can directly control the input / output device to supply power to the control circuit when an input / output device is connected. This shortens the startup time of the Type-C switch, automatically enables normal operation of the Type-C switch, and improves signal transmission efficiency.

[0082] The above provides a detailed description of a Type-C-based power supply control circuit and electronic device disclosed in the embodiments of this utility model. Specific embodiments have been used to illustrate the principles and implementation methods of this utility model. However, the above preferred embodiments are not intended to limit the present invention. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, based on the ideas of this utility model, there will be changes in the specific implementation methods and application scope without departing from the spirit and scope of this utility model. Therefore, the protection scope of this utility model is determined by the scope defined in the claims.

Claims

1. A Type-C based power supply control circuit, characterized by, The circuit comprises a control circuit, a charging and discharging circuit and a Type-C circuit, the Type-C circuit comprises a Type-C input circuit and a Type-C output circuit, the control circuit comprises a signal control circuit, and wherein: The voltage input end of the charging and discharging circuit is electrically connected to the first voltage output end of the Type-C input circuit and the first voltage output end of the Type-C output circuit, the voltage input end of the signal control circuit is electrically connected to the second voltage output end of the Type-C input circuit and the second voltage output end of the Type-C output circuit, the signal input end of the signal control circuit is electrically connected to the signal output end of the Type-C input circuit, the signal output end of the signal control circuit is electrically connected to the signal input end of the Type-C output circuit, the signal input end of the Type-C input circuit and the voltage input end of the Type-C input circuit are used for electrically connecting a signal input device, and the signal output end of the Type-C output circuit is used for electrically connecting a signal output device; The signal control circuit is configured to detect whether a target circuit is connected to a target device, and when it is detected that the target circuit is connected to the target device, trigger the control circuit to perform an operation of controlling the target device to charge the charging and discharging circuit, so that the charging and discharging circuit can supply power to the control circuit; when the target circuit is the Type-C input circuit, the target device is the signal input device, and when the target circuit is the Type-C output circuit, the target device is the signal output device.

2. The Type-C based power supply control circuit according to claim 1, wherein, The control circuit further comprises a control chip, and wherein: The first voltage input end of the control chip is electrically connected to the voltage output end of the charging and discharging circuit, the second voltage input end of the control chip is electrically connected to the first voltage output end of the Type-C input circuit and the first voltage output end of the Type-C output circuit, the control end of the control chip is electrically connected to the enable end of the signal control circuit, the enable end of the Type-C input circuit and the enable end of the Type-C output circuit, and the signal input end of the control chip is electrically connected to the signal output end of the signal control circuit; The control chip is configured to control the signal control circuit to perform the operation of detecting whether the target circuit is connected to the target device, and when receiving the detection result of the target circuit connected to the target device sent by the signal control circuit, control the operation of charging the charging and discharging circuit by the target device, and further configured to control the charging and discharging circuit to supply power to the control chip.

3. The Type-C based power supply control circuit of claim 2, wherein, The signal control circuit comprises a CC signal switching circuit and a device connection detection circuit, and wherein: The control end of the control chip is electrically connected to the enable end of the CC signal switching circuit and the enable end of the device access detection circuit, the voltage input end of the CC signal switching circuit is electrically connected to the voltage output end of the Type-C input circuit and the second voltage output end of the Type-C output circuit, the signal input end of the CC signal switching circuit is electrically connected to the signal output end of the Type-C input circuit, the first signal output end of the CC signal switching circuit is electrically connected to the signal input end of the Type-C output circuit, the second signal output end of the CC signal switching circuit is electrically connected to the signal input end of the device access detection circuit, and the signal output end of the device access detection circuit is electrically connected to the signal input end of the control chip; The CC signal switching circuit is configured to switch a first CC signal output by the signal input device through the Type-C input circuit to obtain a second CC signal under the control of the control chip, and transmit the second CC signal to the signal output device through the Type-C output circuit. The device access detection circuit is configured to output a corresponding voltage signal to the control chip according to the received pulse signal output by the control chip, so as to trigger the control chip to detect whether the Type-C input circuit is connected to the signal input device and / or whether the Type-C output circuit is connected to the signal output device according to the voltage signal.

4. The Type-C based power supply control circuit according to any one of claims 1-3, wherein, The Type-C input circuit includes a Type-C input interface and a first charging control circuit, and the Type-C input interface includes a first voltage output end, a second voltage output end, an enable end, a signal output end and a signal input end. The first voltage output end of the Type-C input interface is electrically connected to the voltage input end of the first charging control circuit and the voltage input end of the CC signal switching circuit of the control circuit, the second voltage output end of the Type-C input interface is electrically connected to the voltage input end of the charging and discharging circuit and the voltage input end of the Type-C output circuit, the voltage output end of the first charging control circuit is electrically connected to the second voltage input end of the control chip of the control circuit, the enable end of the Type-C input interface and the enable end of the first charging control circuit are electrically connected to the control end of the control circuit, the signal output end of the Type-C input interface is electrically connected to the signal input end of the first charging control circuit and the signal input end of the signal control circuit, and the signal input end of the Type-C input interface and the voltage input end of the Type-C input interface are used to be electrically connected to the signal input device. The first charging control circuit is configured to control the signal input device to charge the charging and discharging circuit through the Type-C input interface.

5. The Type-C based power supply control circuit according to claim 4, wherein, The first charging control circuit includes a VBUS voltage detection module and a CC spoofing module. The voltage output end of the VBUS voltage detection module and the voltage output end of the CC decoy module are electrically connected to the second voltage input end of the control chip, the voltage input end of the VBUS voltage detection module is electrically connected to the first voltage output end of the Type-C input interface, and the enable end of the VBUS voltage detection module and the enable end of the CC decoy module are both electrically connected to the control end of the control circuit, and the signal input end of the CC decoy module is electrically connected to the signal output end of the Type-C input interface. The CC decoy module is configured to control the signal input device to output a VBUS voltage through the Type-C input interface and provide the VBUS voltage to the charging and discharging circuit. The VBUS voltage detection module is configured to supply power to the control chip to start the control chip when the Type-C input interface accesses the signal input device, and send voltage information detected by the VBUS voltage detection circuit to the control chip.

6. The Type-C based power supply control circuit of claim 5, wherein, The Type-C output circuit includes a Type-C output interface and a second charging control circuit, wherein: The voltage input end of the Type-C output interface is electrically connected to the second voltage output end of the Type-C input interface, the first voltage output end of the Type-C output interface is electrically connected to the voltage input end of the second charging control circuit and the voltage input end of the CC signal switching circuit of the control circuit, the second voltage output end of the Type-C output interface is electrically connected to the voltage input end of the charging and discharging circuit, the voltage output end of the second charging control circuit is electrically connected to the second voltage input end of the control chip, the enable end of the Type-C output interface and the enable end of the second charging control circuit are both electrically connected to the control end of the control chip of the control circuit, the signal input end of the Type-C output interface and the signal input end of the second charging control circuit are electrically connected to the signal output end of the signal control circuit, and the signal output end of the Type-C output interface is configured to be electrically connected to the signal output device. The second charging control circuit is configured to control the signal output device to charge the charging and discharging circuit through the Type-C output interface.

7. The Type-C based power supply control circuit according to claim 6, wherein, The Type-C circuit further includes a voltage switching circuit, wherein: The enable end of the voltage switching circuit is electrically connected to the control end of the control chip, the voltage input end of the voltage switching circuit is electrically connected to the second voltage output end of the Type-C input interface, and the voltage output end of the voltage switching circuit is electrically connected to the voltage input end of the Type-C output interface. The voltage switching circuit is configured to switch the first VBUS voltage provided by the Type-C input circuit to obtain a second VBUS voltage provided to the Type-C output circuit, or switch the second VBUS voltage provided by the Type-C output circuit to obtain the first VBUS voltage provided to the Type-C input circuit.

8. The Type-C based power supply control circuit according to any one of claims 1, 2, 3, 5, 6 and 7, characterized by, The number of the Type-C input circuits is greater than one, and each of the Type-C input circuits is connected in parallel with each other; and / or, The number of the Type-C output circuits is greater than one, and each of the Type-C output circuits is connected in parallel with each other.

9. The Type-C based power supply control circuit of claim 8, wherein, The charging and discharging circuit comprises a voltage control module and a super capacitor module, wherein: The voltage input end of the voltage control module is electrically connected with the second voltage output end of the Type-C input interface in the Type-C input circuit and the second voltage output end of the Type-C output interface in the Type-C output circuit, and the voltage output end of the voltage control module is electrically connected with the super capacitor module and the first voltage input end of the control chip of the control circuit; The voltage control module is used for processing the VBUS voltage sent by the Type-C input circuit and / or the Type-C output circuit to obtain a supply voltage, and providing the supply voltage to the super capacitor module and the control circuit.

10. A Type-C switch, comprising: The Type-C switch comprises the Type-C-based power supply control circuit according to any one of claims 1-9.

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