Type A-Type C cable and its cable chip

Abstract

The present invention provides a Type A-Type C cable and a cable chip thereof, wherein the cable chip comprises a processing module, a first pull-up resistor, a first switch device, a chip CC1 pin and a chip VBUS pin; the chip CC1 pin is externally connected to the CC line, the chip VBUS pin is connected to the A head VBUS pin, and the chip CC1 pin is connected to the processing module; the processing module can be powered by the chip VBUS pin, the first end of the first pull-up resistor and the first switch device connected in series is connected to the chip VBUS pin, and the second end is connected to the chip CC1 pin, and the first switch device is controlled by the processing module. The present invention is compatible with the circuit structure of a standard Type A-Type C cable and the circuit structure of a Type A-Type C cable for USB PD fast charging.

Description

Technical Field

[0001] The present invention relates to the field of cables, and in particular to a Type A-Type C cable and a cable chip thereof. Background Art

[0002] USB PD, specifically: USB Power Delivery, can be understood as a power transmission protocol. It is a fast charging specification developed by the USB-IF organization, which can support high-power fast charging.

[0003] Due to various considerations (such as cost and compatibility with old products), most existing charging devices still use Type A female socket. As a result, cables with different connectors can be used between devices with Type C interface and charging devices. One end of the cable uses Type A male connector and the other end uses Type C male connector. Therefore, it can also be understood as a Type A-Type C cable.

[0004] In the existing related technologies, in some Type A-Type C cables for USB PD fast charging, the CC pin of the Type C male connector can be connected to the CC pin of the Type A male connector through a CC line, and the CC line can be connected to the electronic tag circuit; in other Type A-Type C cables not for USB PD (such as the common standard Type A-Type C cables), the CC line is not required, and the corresponding CC pin needs to be processed separately. It can be seen that the existing cables cannot take into account both the cable structure for USB PD fast charging and the cable structure of standard cables. Summary of the invention

[0005] The present invention provides a Type A-Type C cable and a cable chip thereof to solve the problem that the cable structure for realizing USB PD fast charging and the cable structure for standard cables cannot be taken into account at the same time.

[0006] According to a first aspect of the present invention, a cable chip of a Type A-Type C cable is provided, wherein the Type A-Type C cable is provided with a Type A male connector, a Type C male connector, and a CC wire, wherein the Type A male connector has an A-connected CC pin and an A-connected VBUS pin, and the Type C male connector has a C-connected CC pin and a C-connected VBUS pin; the CC wire connects the A-connected CC pin and the C-connected CC pin, the A-connected VBUS pin is used to access a power supply voltage, and the A-connected VBUS pin is connected to the C-connected VBUS pin;

[0007] The cable chip includes a processing module, a first pull-up resistor, a first switch device, a chip CC1 pin and a chip VBUS pin; the chip CC1 pin is externally connected to the CC line, the chip VBUS pin is connected to the A head VBUS pin, and the chip CC1 pin is connected to the processing module; the processing module can be powered by the chip VBUS pin 0;

[0008] A first end of the first pull-up resistor and the first switch device connected in series is connected to the VBUS pin of the chip, and a second end is connected to the CC1 pin of the chip. The first switch device is controlled by the processing module.

[0009] Optionally, the processing module includes a single-line and electronic tag digital unit and a level conversion unit; the chip CC1 pin is connected to the input and output pins of the single-line and electronic tag digital unit;

[0010] The single-line and electronic tag digital unit is connected to the first switch device through the level conversion unit to control the on and off of the first switch device.

[0011] Optionally, the power supply pin of the single-line and electronic tag digital unit is connected to the chip VBUS pin through a step-down unit.

[0012] Optionally, the first switching device is configured to be in an on state by default.

[0013] Optionally, the first switching device includes a first PMOS, a gate of the first PMOS is connected to the processing module, and the gate of the first PMOS is grounded via a pull-down resistor, a source of the first PMOS is connected to the VBUS pin of the chip, and a drain of the first PMOS is connected to the CC1 pin of the chip via the first pull-up resistor.

[0014] Optionally, the cable chip further includes a second switch device and a second pull-up resistor, and the cable chip further includes a chip CC2 pin, and the chip CC2 pin is connected to the C head VCONN pin in the Type C male connector;

[0015] The first end of the second switch device connected in series with the second pull-up resistor is connected to the VBUS pin of the chip, and the second end is connected to the CC2 pin of the chip. The second switch device is controlled by the processing module.

[0016] Optionally, the chip CC2 pin is also connected to the processing module.

[0017] Optionally, the second switching device is configured to be in an off state by default.

[0018] Optionally, the second switching device includes a second PMOS, the gate of the second PMOS is connected to the processing module, the source of the second PMOS is connected to the VBUS pin of the chip, the drain of the second PMOS is connected to the C-head VCONN pin via the second pull-up resistor, and a third pull-up resistor is connected between the gate and source of the second PMOS.

[0019] According to a second aspect of the present invention, there is provided a Type A-Type C cable, comprising the cable chip involved in the first aspect and its optional solutions.

[0020] The Type A-Type C cable and its cable chip provided by the present invention are connected to the chip VBUS pin through the first end after the first pull-up resistor and the first switch device are connected in series, and the second end is connected to the chip CC1 pin. The first switch device can be turned on so that the chip CC1 pin can be connected to the chip VBUS through the first pull-up resistor, which can meet the needs when the chip CC1 pin is not used for USB PD fast charging, and thus the present invention is compatible with the circuit structure of the standard Type A-Type C cable; at the same time, the first switch device can be turned off so that the processing module can interact and communicate with the connected electronic device through the chip CC1 pin. Based on the interactive communication, for example, the functions of electronic tag and single-line communication can be realized, and thus the present invention is compatible with the circuit structure of the Type A-Type C cable for USB PD fast charging. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0022] Figure 1 Schematic diagram of the structure of the cable chip of the Type A-Type C cable in one embodiment of the present invention Figure 1 ;

[0023] Figure 2 Schematic diagram of the structure of the cable chip of the Type A-Type C cable in one embodiment of the present invention Figure 2 ;

[0024] Figure 3 Schematic diagram of the structure of the cable chip of the Type A-Type C cable in one embodiment of the present invention Figure 3 ;

[0025] Figure 4Schematic diagram of the structure of the cable chip of the Type A-Type C cable in one embodiment of the present invention Figure 4 ;

[0026] Figure 5 Schematic diagram of the structure of the cable chip of the Type A-Type C cable in one embodiment of the present invention Figure 5 ;

[0027] Figure 6 Schematic diagram of the structure of the cable chip of the Type A-Type C cable in one embodiment of the present invention Figure 6 .

[0028] Description of reference numerals:

[0029] 1-Type A male connector;

[0030] 11-A head CC foot;

[0031] 12-A VBUS pin;

[0032] 2-Type C male connector;

[0033] 21-C head CC foot;

[0034] 22-C connector VBUS pin;

[0035] 23-C header VCONN pin;

[0036] 3- Cable chip;

[0037] 31-Chip CC1 pin;

[0038] 32- first pull-up resistor;

[0039] 33-processing module;

[0040] 331-single line and electronic label digital unit;

[0041] 332-level conversion unit;

[0042] 333- step-down unit;

[0043] 34-a first switching device;

[0044] 35- a second switching device;

[0045] 36-Chip CC2 pin;

[0046] 37- second pull-up resistor;

[0047] 38-input buffer;

[0048] 4-CC line. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0051] The technical solution of the present invention is described in detail with specific embodiments below. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0052] Figure 1 Schematic diagram of the structure of the cable chip of the Type A-Type C cable in one embodiment of the present invention Figure 1 .

[0053] The Type A-Type C cable involved in this embodiment can be connected between a charging device and a device to be charged.

[0054] The device to be charged can be understood as any electronic device with a Type C socket, for example, it can be a computer, tablet computer, mobile phone, car-mounted equipment or any other electronic device with a Type C socket.

[0055] The charging device can be any power supply device suitable for USB PD charging and using a Type A socket. It can be dedicated to charging, such as a travel adapter, a mobile power supply, a power socket, a car cigarette lighter, a charger, etc. It can also be an electronic device that is not dedicated to charging but can be used for charging, such as a computer, a tablet computer, a mobile phone, a car device or any other electronic device that can charge other devices.

[0056] The travel adapter can be understood as a power supply product that converts AC to DC, which can be a standard accessory in the mobile phone packaging box. The charger can be understood as various power supply products that can power mobile phones and other electronic devices.

[0057] Please refer to Figure 1 The Type A-Type C cable is provided with a Type A male connector 1, a Type C male connector 2, and a CC line 4. The Type A male connector 1 has an A-head CC pin 11 and an A-head VBUS pin 12, and the Type C male connector 2 has a C-head CC pin 21 and a C-head VBUS pin 22; the CC line 4 connects the A-head CC pin 11 and the C-head CC pin 21, and the A-head VBUS pin 12 is used to access the power supply voltage, which can be represented by VBUS, for example. The A-head VBUS pin is connected to the C-head VBUS pin, and further, the voltage of the A-head VBU pin and the C-head VBUS pin can be the same.

[0058] At the same time, the Type A male connector 1 may also have Figure 1 The A-pin D+ and A-pin shown in the figure, the Type C male connector 2 may also have Figure 1 The C head D+ pin and the C head D- pin shown in the figure, the A head D+ pin can be connected to the C head D+ pin, and the A head D- pin can be connected to the C head D- pin.

[0059] Please refer to Figure 1 In this embodiment, the cable chip 3 of the Type A-Type C cable includes: a processing module 33, a first pull-up resistor 32, a first switch device 34, a chip CC1 pin 31 and a chip VBUS pin.

[0060] The chip CC1 pin 31 is externally connected to the CC line 4, the chip VBUS pin is connected to the A head VBUS pin 12, and the chip CC1 pin 31 is connected to the processing module 33; the processing module 33 can be powered by the chip VBUS pin. At the same time, this embodiment does not exclude the implementation method in which the processing module 33 is also powered by other pins.

[0061] A first end of the first pull-up resistor 32 and the first switch device 34 connected in series is connected to the chip VBUS pin, and a second end is connected to the chip CC1 pin 31 . The first switch device 34 is controlled by the processing module 33 .

[0062] In the above implementation, when the first switch device 34 is turned on, the chip VBUS pin and the chip CC1 pin 31 can be connected via the first pull-up resistor 32 , so that the chip CC1 pin can be connected to the chip VBUS pin via the first pull-up resistor 32 .

[0063] In this regard, it should be pointed out that the standard Type A-Type C cables provided by some companies do not have the USB PD fast charging function, wherein the Type A male connector does not have a CC pin, and thus does not have a CC line, and the CC pin of the Type C male connector and the VBUS pin of the Type C connector can be connected together via a pull-up resistor. In this embodiment, the implementation of this function is configured in the cable chip 3. It can be seen that when the first switch device 34 is turned on, this embodiment can realize the requirement when the CC1 pin of the chip is not used for USB PD fast charging, and thus the above implementation method can be compatible with the circuit structure of this type of standard Type A-Type C cable.

[0064] In the above implementation, when the first switch device 34 is turned off, the chip VBUS pin and the chip CC1 pin 31 can be disconnected. At this time, the processing module can interact and communicate with the connected electronic device through the chip CC1 pin and the A head CC pin. Based on the interactive communication, for example, the function of electronic tag and single-line communication can be realized.

[0065] In a specific example, the resistance of the first pull-up resistor 32 may be, for example, 56K ohms.

[0066] In this regard, it should be pointed out that in the Type A-Type C cables for USB PD fast charging provided by some companies, the VBUS pin of the A head can power the electronic tag chip when receiving power, and the CC line can communicate with the electronic tag chip to support USB PD communication and realize cable identification and other functions. Therefore, the above implementation method is compatible with the circuit structure of the Type A-Type C cable for realizing such USB PD fast charging.

[0067] It can be seen that regarding the CC pin involved above, CC specifically stands for: Configuration Channel, and then the CC pin can be specifically understood as: configuration channel pin. Through the CC pin, it is convenient to support USB PD communication and realize cable identification and other functions. Correspondingly, the processing module involved above can be understood as any circuit module that can cooperate with the CC pin to realize the corresponding function, so it can correspond to the corresponding function of the electronic tag chip in the prior art.

[0068] Figure 2 Schematic diagram of the structure of the cable chip of the Type A-Type C cable in one embodiment of the present invention Figure 2 .

[0069] Please refer to Figure 2In one embodiment, the processing module 33 includes a single-line and electronic tag digital unit 331 and a level conversion unit 332; the chip CC1 pin 31 is connected to the input and output pins of the single-line and electronic tag digital unit 331; the single-line and electronic tag digital unit 331 is connected to the first switching device 34 through the level conversion unit 332 to control the on and off of the first switching device 34.

[0070] The single wire and electronic tag digital unit 331 is specifically One Wire&eMarker Digital Block.

[0071] The One Wire here can be understood as a single-wire communication function, which can be understood as a communication method that can be completed using a single signal line according to the pre-agreed communication rate, signal specifications, master-slave mode, etc. when digital signals are communicated between devices.

[0072] The eMarker can be understood as an electronic tag, which can be understood by referring to the function of the electronic tag chip in the existing related technology.

[0073] It can be seen that it can realize the functions of single-line communication and electronic tags. Any circuit unit that realizes the above functions through software and / or hardware does not deviate from the description of this embodiment, and is thus compatible with the circuit structure of most Type A-Type C cables.

[0074] For example: the single-line communication function and the electronic tag function can both be implemented through hardware. For another example: if the single-line and electronic tag digital unit 331 subtracts the single-line communication function part in the digital unit, the main functional part of the present invention can be implemented only through the electronic tag digital unit with the software; for another example: if the single-line and electronic tag digital unit 331 subtracts the electronic tag function part in the digital unit, the main functional part of the present invention can be implemented only through the single-line communication unit with the software.

[0075] In addition, the optional solution of this embodiment can also realize part of the functions of the HV LDO through a single line and the electronic label digital unit 331 .

[0076] Meanwhile, in the above implementation, the single-line and electronic tag digital unit 331 may also have the function of controlling the on and off of the first switch device 34 through the level conversion unit 332. Specifically, the first switch device 34 may be controlled to be on and off in response to the triggering of the corresponding button or switch in the cable, or the first switch device 34 may be automatically controlled to be on and off; for example, when a specific continuous logic level is received on the chip CC1 pin 31 of the cable chip 3, the pull-up resistor (i.e., the first pull-up resistor 32) from the chip CC1 pin 31 to VBUS may be automatically configured to be connected or disconnected after being interpreted by the internal single-line and electronic tag digital unit 331.

[0077] The level conversion unit 332 may specifically refer to a Level Translator, which may be understood as a circuit unit that can convert the level so that the signal output by the digital unit can be converted to be suitable for controlling the first switch device 34. Specifically, since the level of the output signal of the single-line and electronic tag digital unit does not match the level of the signal controlling the first switch device, it is necessary to convert it. For example, when the signal of a 3.3V digital circuit (such as the output signal of the single-line and electronic tag digital unit 331) communicates with the signal of an analog circuit operating at 20V (such as the controlled signal of the first switch device), the level conversion unit 332 mentioned above may be used for level conversion.

[0078] The level conversion unit 332 may also be connected to the VBUS pin of the chip to receive power.

[0079] Figure 3 Schematic diagram of the structure of the cable chip of the Type A-Type C cable in one embodiment of the present invention Figure 3 .

[0080] Please refer to Figure 3 In one embodiment, the power supply pin of the single-wire and electronic tag digital unit 331 is connected to the chip VBUS pin through the step-down unit 333.

[0081] Furthermore, the buck unit 333 can buck the power supply from the chip VBUS pin and supply it to the single-line and electronic tag digital unit 331. The buck unit 333 can be specifically a HV LDO, that is, a high-voltage-resistant linear buck unit, where LDO specifically refers to low drop output.

[0082] At the same time, in other implementations, since the single-line communication technology has the ability to draw power from the data line, for scenarios where only single-line communication is required for identification and authentication, the cable chip may not use a high-voltage resistant linear step-down unit, so as to reduce the cost of this integrated solution and product power consumption.

[0083] In this regard, specific explanation is required: since conventional electronic tag devices (i.e., eMarker) can handshake with the USB source device (i.e., power supply device or host device) through the CC pin and VCONN pin of the Type C female connector, and then the VCONN pin of the USB source device powers the electronic tag device; however, since the customized Type A male connector only supports one CC pin for CC communication, the Type A male connector does not have VCONN to power the single-line and electronic tag digital circuit 331 similar to the electronic tag device, so VBUS is required to power the single-line and electronic tag digital circuit 331 in the cable chip. Considering that VBUS can reach up to 20V, the high-voltage-resistant linear step-down unit (i.e., HV LDO) mentioned above is required to be used additionally.

[0084] Figure 4 Schematic diagram of the structure of the cable chip of the Type A-Type C cable in one embodiment of the present invention Figure 4 .

[0085] Please refer to Figure 4 In one embodiment, the cable chip 3 further includes a second switch device 35 and a second pull-up resistor 37. The cable chip 3 further includes a chip CC2 pin 36. The chip CC2 pin 36 is connected to the C head VCONN pin 23 in the Type C male connector 2.

[0086] A first end of the second switch device 35 connected in series with the second pull-up resistor 37 is connected to the chip VBUS pin, and a second end is connected to the chip CC2 pin 36 . The second switch device 35 is controlled by the processing module 33 .

[0087] When the second switch device 35 is turned on, the chip VBUS pin and the chip CC2 pin 36 can be connected via the second pull-up resistor 37 , so that the chip CC2 pin can be connected to the chip VBUS pin via the second pull-up resistor 37 .

[0088] In this regard, it should be pointed out that in another non-standard Type A-Type C cable without USB PD fast charging function provided by some companies, the Type A male connector is not equipped with a CC pin, and thus no CC line is configured. The C-head VCONN pin and the C-head VBUS pin of the Type C male connector can be connected together through a pull-up resistor. In this embodiment, the implementation of its function can also be configured in the cable chip 3. It can be seen that when the second switch device 34 is turned on, the above implementation method is compatible with the circuit structure of this type of non-standard Type A-Type C cable.

[0089] In the above implementation, when the second switch device 35 is turned off, the chip VBUS pin and the chip CC2 pin 36 may be disconnected.

[0090] In this regard, it should be pointed out that in the USB PD fast-charging Type A-Type C cables and non-fast-charging Type A-Type C cables provided by some companies, the C-head VCONN pin may not be pulled up to the C-head VBUS pin, and thus the above implementation method is compatible with the circuit structure of these Type A-Type C cables.

[0091] Figure 5 Schematic diagram of the structure of the cable chip of the Type A-Type C cable in one embodiment of the present invention Figure 5 .

[0092] Please refer to Figure 5 In this embodiment, the second switch device 35 can be controlled by the single-line and electronic tag digital unit 331 via the level conversion unit 332.

[0093] In the above implementation, the single-line and electronic tag digital unit 331 may also have the function of controlling the on and off of the second switch device 35 through the level conversion unit 332. Specifically, the second switch device 35 may be controlled to be on and off in response to the triggering of the corresponding button or switch in the cable, or the second switch device 35 may be automatically controlled to be on and off; for example, after the specific continuous logic level received on the chip CC1 pin 31 of the cable chip 3 is interpreted by the internal single-line and electronic tag digital unit 331, the pull-up resistor (i.e., the second pull-up resistor 37) from the chip CC2 pin 36 to VBUS may be automatically configured to be connected or not connected.

[0094] During the specific implementation process, the chip CC2 pin 36 is also connected to the processing module 33, specifically connected to the single-line and electronic tag digital unit 331 therein, and then, the chip CC2 pin 36 can be reserved to support logic level input when used alone.

[0095] Furthermore, the chip CC2 pin 36 can be connected to the processing module 33 through the input buffer 38, specifically connected to the single-line and electronic tag digital unit 331, and the input buffer 38 can have a comparison function. Furthermore, the input buffer with a comparator function can be used to reserve the chip CC2 pin for single use and can also support logic level input and analog level comparison judgment input.

[0096] Meanwhile, the input buffer 38 may not be used in this embodiment, and the input buffer may be configured as a buffer without a comparison function, or the input buffer may be replaced by other devices. Regardless of any changes, they do not deviate from the description of this embodiment.

[0097] Figure 6Schematic diagram of the structure of the cable chip of the Type A-Type C cable in one embodiment of the present invention Figure 6 .

[0098] Please refer to Figure 6 , Buffer&Comp can be used to characterize the input buffer with comparator function.

[0099] In one implementation manner, the first switch device 34 may be configured to be in an on state by default.

[0100] Please refer to Figure 6 , wherein Rp1 can be used to represent the first pull-up resistor 32; in a specific example, the first switch device 34 can include a first PMOS, which can be as follows Figure 6 As shown in P1 in FIG. 1 , the gate of the first PMOS is connected to the processing module, and the gate of the first PMOS is grounded via a pull-down resistor R1, the source of the first PMOS is connected to the VBUS pin of the chip, and the drain of the first PMOS is connected to the CC1 pin of the chip via the first pull-up resistor Rp1. The gate of the first PMOS can be specifically connected to the single-line and electronic tag digital unit 331 via a level conversion unit 332.

[0101] It can be seen that the grounding of the pull-down resistor R1 can be used to make the first switch device in the on state by default. Furthermore, the pull-down resistor R1 ensures that the first PMOS is kept in the on state by default when the single-line and electronic tag digital unit 331 does not receive a specific command from a charging device such as a charger or a mobile phone or a to-be-charged device, so that the CC pin of the Type C male connector can keep the first pull-up resistor Rp1 hanging on VBUS.

[0102] In one implementation manner, the second switch device 35 may be configured to be in an off state by default.

[0103] Please refer to Figure 6 , wherein Rp2 can be used to represent the second pull-up resistor 37; in a specific example, the second switch device 35 may include a second PMOS, which may be as follows Figure 6 As shown in P2 in FIG; the gate of the second PMOS is connected to the processing module, the source of the second PMOS is connected to the VBUS pin of the chip, the drain of the second PMOS is connected to the VCONN pin of the C head via the second pull-up resistor Rp2, and a third pull-up resistor R2 is connected between the gate and source of the second PMOS. Specifically, the gate of the first PMOS can be connected to the single-line and electronic tag digital unit 331 via the level conversion unit 332.

[0104] It can be seen that the third pull-up resistor R2 can be used to ensure that the second switch device is in the off state by default, and ensure that when the cable involved in this embodiment is used to implement the circuit structure of the standard Type A-Type C cable, the second pull-up resistor Rp2 of the C head VCONN pin is not pulled to VBUS at this time, thereby ensuring that when the chip CC1 pin in the chip is not connected to a specific digital signal operation, the Type A-Type C cable is configured as a standard Type A-Type C cable by default.

[0105] In the above implementation, the default conduction of the first PMOS and the default disconnection of the second PMOS are achieved through two PMOSs, a pull-down resistor and a third pull-up resistor.

[0106] In other optional implementations, in the absence of a level conversion unit, other circuits can also be used to achieve the default configuration and on-off state control. Specifically, for each PMOS, the default configuration can be achieved in combination with the corresponding NMOS and resistor, that is: for the first pull-up resistor Rp1 and the chip CC1 pin, two NMOS, one PMOS and two resistors can be used to achieve the default configuration and on-off control, wherein the PMOS can be similar to the first PMOS mentioned above, and can be connected in series with the first pull-up resistor; for the second pull-up resistor Rp2 and the chip CC2 pin, one NMOS, one PMOS and one resistor can be used to achieve the default configuration and on-off control, wherein the PMOS can be similar to the second PMOS mentioned above, and can be connected in series with the second pull-up resistor.

[0107] For the default conduction of the first switching device, for example: the drains of the two NMOS are respectively connected to VBUS through resistors, the sources of the two NMOS can be directly connected to the ground, the drain of the first NMOS can be connected to the gate of the second NMOS, the drain of the second NMOS can be connected to the gate of the first PMOS, and the gate of the first NMOS is connected to the single line and the logic output of the electronic tag digital unit, thereby achieving default conduction; for the default disconnection of the second switching device, the source of the NMOS is grounded, the gate of the NMOS is connected to the single line and the logic output of the electronic tag digital unit, the drain of the NMOS is connected to VBUS through a resistor and the drain is also connected to the gate of the second PMOS, thereby achieving default disconnection.

[0108] At the same time, Figure 6 In the illustrated implementation, the cable chip 3 can be implemented by an integrated circuit with four pins (ie, using the chip VBUS pin, the chip CC1 pin, the chip CC2 pin and the GND pin) to implement the cable chip involved in this embodiment, thereby minimizing the cost.

[0109] During the specific implementation process, the maximum operating voltage of VBUS in the USB Type C specification can reach 20V, so the chip VBUS pin, chip CC1 pin, and chip CC2 pin of the cable chip 3 can withstand a voltage above 20V, and the expected voltage is 30V.

[0110] It can be seen that the above specific implementations are compatible with the following circuit structures of various Type A-Type C cables:

[0111] For the first type of cable, it can be regarded as a standard Type A-Type C cable that does not implement fast charging, wherein the Type A male connector does not have a CC pin, and the CC pin of the Type C male connector is pulled up to the VBUS pin via a pull-up resistor. The optional implementation of this embodiment can be compatible with the first type of cable by controlling the first switch device 34 to be turned on and the second switch device 35 to be turned off;

[0112] For the second type of cable, it can be regarded as another Type A-Type C cable that does not achieve fast charging, in which the Type A male connector does not have a CC pin, the CC pin of the Type C male connector is pulled up to the VBUS pin via a pull-up resistor, and the VCONN pin of the Type C male connector is pulled up to the VBUS pin via a pull-up resistor. The VCONN pin corresponds to another CC pin (i.e., CC1 or CC2 pin) in a device with a Type C female connector (i.e., a device to be charged, such as a smartphone). An optional method of this embodiment can achieve compatibility with the second type of cable by controlling both the first switch device 34 and the second switch device 35 to be turned on.

[0113] For the third type of cable, the Type A male connector is provided with an ID pin (or CC pin), and the ID pin (or CC pin) can be connected to the single-wire communication identity authentication chip (One Wire Authenticator) in the cable, wherein the CC pin of the Type C male connector is pulled up to the VBUS pin via a pull-up resistor. The optional method of this embodiment can realize the compatibility of the third type of cable by controlling the conduction of the first switch device 34 and the corresponding configuration in the processing module.

[0114] For the fourth type of cable, it can be regarded as a Type A-Type C cable that can achieve fast charging, in which the Type A male connector is provided with a CC pin, and the CC pin can be connected to the electronic tag chip in the cable. An optional method of this embodiment can achieve compatibility with the fourth type of cable by controlling both the first switch device 34 and the second switch device 35 to be turned off.

[0115] Therefore, currently different companies implement the USB PD protocol or its private fast charging protocol and related cable identification methods differently, resulting in Type A-Type C cables that look the same in appearance being incompatible when fast charging different devices, resulting in cable waste. However, this embodiment and its optional solutions provide an integrated solution that can be identified and configured within the cable, which can use the same cable to a greater extent to meet the fast charging and non-fast charging requirements of devices of different brands.

[0116] In summary, the Type A-Type C cable and its cable chip provided in this embodiment are connected to the chip VBUS pin through the first end after the first pull-up resistor and the first switch device are connected in series, and the second end is connected to the chip CC1 pin. The first switch device can be turned on so that the chip CC1 pin can be connected to the chip VBUS through the first pull-up resistor, which can meet the needs when the chip CC1 pin is not used for USB PD fast charging, and thus the present invention is compatible with the circuit structure of the standard Type A-Type C cable; at the same time, the first switch device can be turned off so that the processing module can interact and communicate with the connected electronic device through the chip CC1 pin. Based on the interactive communication, for example, the functions of electronic tag and single-line communication can be realized, and thus the present invention is compatible with the circuit structure of the Type A-Type C cable for USB PD fast charging.

[0117] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A cable chip for a Type A-Type C cable, wherein the Type A-Type C cable is provided with a Type A male connector, a Type C male connector, and a CC line, wherein the Type A male connector has an A-connected CC pin and an A-connected VBUS pin, and the Type C male connector has a C-connected CC pin and a C-connected VBUS pin; The CC line connects the CC pin of the A head and the CC pin of the C head, the VBUS pin of the A head is used to access the power supply voltage, and the VBUS pin of the A head is connected to the VBUS pin of the C head; it is characterized in that the cable chip includes a processing module, a first pull-up resistor, a first switch device, a chip CC1 pin and a chip VBUS pin; the chip CC1 pin is externally connected to the CC line, the chip VBUS pin is connected to the VBUS pin of the A head, and the chip CC1 pin is connected to the processing module; the processing module can be powered by the chip VBUS pin; A first end of the first pull-up resistor connected in series with the first switch device is connected to the VBUS pin of the chip, and a second end is connected to the CC1 pin of the chip, and the first switch device is controlled by the processing module; The processing module includes a single-line and electronic tag digital unit and a level conversion unit; the chip CC1 pin is connected to the input and output pins of the single-line and electronic tag digital unit; The single-line and electronic tag digital unit is connected to the first switch device through the level conversion unit to control the on and off of the first switch device; It also includes a second switch device and a second pull-up resistor, and the cable chip also includes a chip CC2 pin, and the chip CC2 pin is connected to the C head VCONN pin in the Type C male connector; The first end of the second switch device connected in series with the second pull-up resistor is connected to the VBUS pin of the chip, and the second end is connected to the CC2 pin of the chip. The second switch device is controlled by the processing module.

2. The cable chip according to claim 1, characterized in that: The power supply pins of the single-line and electronic tag digital units are connected to the VBUS pins of the chip through the step-down unit.

3. The cable chip according to claim 1, characterized in that: The first switching device is configured to be in an on state by default.

4. The cable chip according to claim 3, characterized in that: The first switching device includes a first PMOS, a gate of the first PMOS is connected to the processing module, and the gate of the first PMOS is grounded via a pull-down resistor, a source of the first PMOS is connected to the VBUS pin of the chip, and a drain of the first PMOS is connected to the CC1 pin of the chip via the first pull-up resistor.

5. The cable chip according to claim 1, characterized in that: The chip CC2 pin is also connected to the processing module.

6. The cable chip according to claim 1, characterized in that: The second switching device is configured to be in an off state by default.

7. The cable chip according to claim 6, characterized in that: The second switching device includes a second PMOS, the gate of the second PMOS is connected to the processing module, the source of the second PMOS is connected to the VBUS pin of the chip, the drain of the second PMOS is connected to the C-head VCONN pin via the second pull-up resistor, and a third pull-up resistor is connected between the gate and source of the second PMOS.

8. A Type A-Type C cable, characterized in that: Comprising the cable chip according to any one of claims 1 to 7.

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