Control circuit and data line

Abstract

The application discloses a control circuit and a data line. The control circuit is connected between a first interface and n second interfaces. When one second interface is connected with a first power device, the connection between a channel configuration pin of the first interface and a first target interface is established, the connection between a current source branch and the channel configuration pin of the first target interface is disconnected, and the connection between a bus power supply pin of the first interface and the first target interface is established. When one second interface is connected with a first power device and another second interface is connected with a second power device, the connection between the channel configuration pins of the first interface and the first target interface and the second target interface is disconnected, the connection between the current source branch and the channel configuration pins in the first target interface and the second target interface is established, and the connection between the bus power supply pin of the first interface and the first target interface and the second target interface is established. Through the above mode, a charger of a USB Type-C interface can be converted into a multi-port charger, and the practicability is high.

Description

Technical Field

[0001] This application relates to the field of data communication technology, and in particular to a control circuit and data line. Background Technology

[0002] A data cable is a type of cable used to connect electronic devices for data transmission. It can transmit various types of data, including digital signals, audio signals, and video signals. The function of a data cable is to transfer data from one device to another, such as transferring data from a computer to a printer or mobile device.

[0003] Common data cables include Lightning cables, USB Micro-USB cables, and USB Type-C cables.

[0004] Currently, the common solution for one-to-multi-port data cables is to convert one USB Type-A port to three other ports: USB Type-C, Lightning, and USB Micro-B. However, this type of cable is not compatible with USB Type-C chargers, making it less practical. Summary of the Invention

[0005] This application aims to provide a control circuit and data cable that can convert a USB Type-C interface charger to multiple ports, making it highly practical.

[0006] To achieve the above objectives, in a first aspect, this application provides a control circuit connected between a first interface and n second interfaces. The first interface is used to connect to a charging device, and each of the n second interfaces is used to connect to a power-consuming device, where n is an integer ≥ 2. The control circuit includes:

[0007] First switch branch, second switch branch, third switch branch, current source branch and control unit;

[0008] The second switch branch is connected to the third switch branch, the channel configuration pin in the first interface, and the channel configuration pin in the second interface, respectively. The third switch branch is also connected to the current source branch and the channel configuration pin in the second interface, respectively. The first switch branch is connected to the bus power pin in the first interface and the bus power pin in the second interface, respectively. The first switch branch, the second switch branch, and the third switch branch are also connected to the control unit.

[0009] When one of the n second interfaces is connected to the first electrical device, the control unit controls the second switch branch to establish a connection between the channel configuration pin in the first interface and the channel configuration pin in the first target interface, controls the third switch branch to disconnect the current source branch from the channel configuration pin in the first target interface, and controls the first switch branch to establish a connection between the bus power pin in the first interface and the bus power pin in the first target interface, wherein the first target interface is the second interface connected to the first electrical device, and the current source branch is used to output the first current;

[0010] When one of the n second interfaces is connected to the first electrical device, and another of the n second interfaces is connected to the second electrical device, the control unit controls the second switch branch to disconnect the channel configuration pin in the first interface from the channel configuration pin in the first target interface and the channel configuration pin in the second target interface, controls the third switch branch to establish the connection between the current source branch and the channel configuration pin in the first target interface and the second target interface, and controls the first switch branch to establish the connection between the bus power pin in the first interface and the bus power pin in the first target interface and the second target interface, wherein the second target interface is the second interface connected to the second electrical device.

[0011] In one alternative approach, the second switch branch includes n first switches;

[0012] One of the n first switches is connected between the channel configuration pin of the first interface and the channel configuration pin of one of the n second interfaces, and the first switch and the second interface are connected in a one-to-one correspondence.

[0013] In one alternative approach, the third switch branch includes n second switches;

[0014] One of the n second switches is connected between the current source branch and the channel configuration pin of one of the n second interfaces, and the second switch and the second interface are connected in a one-to-one correspondence.

[0015] In one alternative approach, the current source branch includes n current sources;

[0016] The current source is connected to the second switch in a one-to-one correspondence.

[0017] In one alternative approach, the first switching branch includes n switching transistors;

[0018] One of the n switching transistors is connected between the bus power pin of the first interface and the bus power pin of one of the n second interfaces, and the second switch is connected to the second interface in a one-to-one correspondence.

[0019] In one alternative embodiment, the control circuit further includes a fourth switch branch, which is connected to the differential signal positive pin and differential signal negative pin of the first interface and the differential signal positive pin and differential signal negative pin of the second interface, respectively.

[0020] When the first target interface is connected to the first electrical device, the control unit is used to control the fourth switch branch to establish a connection between the differential signal positive pin of the first interface and the differential signal positive pin of the first target interface, and to establish a connection between the differential signal negative pin of the first interface and the differential signal negative pin of the first target interface.

[0021] In one alternative configuration, the fourth switch branch includes n third switches, n fourth switches, and n fifth switches;

[0022] One of the n third switches is connected between the differential signal positive pin of the first interface and the differential signal positive pin of one of the n second interfaces, and the third switch is connected to the second interface in a one-to-one correspondence.

[0023] One of the n fourth switches is connected between the differential signal negative pin of the first interface and the differential signal negative pin of one of the n second interfaces, and the fourth switch is connected to the second interface in a one-to-one correspondence.

[0024] One of the n fifth switches is connected between the positive and negative differential signal pins of one of the n second interfaces, and the fifth switch and the second interface are connected in a one-to-one correspondence.

[0025] In one alternative approach, the third target interface among the n second interfaces is a USB Type-C interface;

[0026] The control unit is also used to acquire the voltage of the first node and determine that the third target interface has been connected to the electrical equipment when the voltage of the first node is less than a first voltage threshold. The first node is the connection point between the channel configuration pins of the second switch branch, the third switch branch and the third target interface.

[0027] In one alternative approach, the fourth target interface among the n second interfaces is either a USB Micro-B interface or a Lightning interface;

[0028] The control circuit also includes a power supply unit, which is used to output a second current to the bus power pin in the fourth target interface;

[0029] The control unit is also used to acquire the voltage of the bus power pin in the fourth target interface, and determine that the fourth target interface is connected to the power supply device when the voltage of the bus power pin in the fourth target interface is less than the second voltage threshold.

[0030] In one alternative embodiment, the control circuit also includes a sixth switch and a first resistor;

[0031] The first end of the first resistor is connected to the channel configuration pins of the second switch branch and the first interface, respectively. The second end of the first resistor is connected to the first end of the sixth switch, and the second end of the sixth switch is grounded.

[0032] Secondly, this application provides a control circuit connected between a first interface and n second interfaces. The first interface is used to connect to a charging device, and each of the n second interfaces is used to connect to a power-consuming device, where n is an integer ≥ 2. The control circuit includes:

[0033] The chip includes a first switch branch, wherein the chip comprises a second switch branch, a third switch branch, a current source branch, and a control unit;

[0034] The second switch branch is connected to the third switch branch, the channel configuration pin in the first interface, and the channel configuration pin in the second interface, respectively. The third switch branch is also connected to the current source branch and the channel configuration pin in the second interface, respectively. The first switch branch is connected to the bus power pin in the first interface and the bus power pin in the second interface, respectively.

[0035] When one of the n second interfaces is connected to the first electrical device, the control unit controls the second switch branch to establish a connection between the channel configuration pin in the first interface and the channel configuration pin in the first target interface, controls the third switch branch to disconnect the current source branch from the channel configuration pin in the first target interface, and controls the first switch branch to establish a connection between the bus power pin in the first interface and the bus power pin in the first target interface, wherein the first target interface is the second interface connected to the first electrical device, and the current source branch is used to output the first current;

[0036] When one of the n second interfaces is connected to the first electrical device, and another of the n second interfaces is connected to the second electrical device, the control unit controls the second switch branch to disconnect the channel configuration pin in the first interface from the channel configuration pin in the first target interface and the channel configuration pin in the second target interface, controls the third switch branch to establish the connection between the current source branch and the channel configuration pin in the first target interface and the second target interface, and controls the first switch branch to establish the connection between the bus power pin in the first interface and the bus power pin in the first target interface and the second target interface, wherein the second target interface is the second interface connected to the second electrical device.

[0037] Thirdly, this application provides a data cable including a first interface, n second interfaces, and a control circuit as described above, wherein the control circuit is connected between the first interface and the n second interfaces, and n is an integer ≥ 2.

[0038] The beneficial effects of this application are as follows: The control circuit provided in this application is connected between a first interface and n second interfaces. The first interface is used to connect to a charging device, and each of the n second interfaces is used to connect to a power-consuming device. Here, n is an integer ≥ 2. The control circuit includes a first switch branch, a second switch branch, a third switch branch, a current source branch, and a control unit. When one of the n second interfaces is connected to the first power-consuming device, the control unit controls the second switch branch to establish a connection between the channel configuration pins in the first interface and the channel configuration pins in the first target interface, controls the third switch branch to disconnect the connection between the current source branch and the channel configuration pins in the first target interface, and controls the first switch branch to establish a connection between the bus power pins in the first interface and the bus power pins in the first target interface. The first target interface is the second interface connected to the first power-consuming device, and the current source branch is used to output a first current. Therefore, charging of the power-consuming device can be achieved when one of the second interfaces is connected to the power-consuming device. When one of the n second interfaces is connected to the first power-consuming device, and another of the n second interfaces is connected to the second power-consuming device, the control unit controls the second switch branch to disconnect the channel configuration pins in the first interface from the channel configuration pins in the first and second target interfaces, controls the third switch branch to establish the connection between the current source branch and the channel configuration pins in the first and second target interfaces, and controls the first switch branch to establish the connection between the bus power pins in the first interface and the bus power pins in the first and second target interfaces, where the second target interface is the second interface connected to the second power-consuming device. This enables charging of the power-consuming device when two second interfaces are connected to it. Similarly, this allows charging of the power-consuming device when one or more second interfaces are connected to it, achieving a one-to-many port conversion process. It is applicable to USB Type-C interface chargers and has strong practicality. Attached Figure Description

[0039] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0040] Figure 1 A schematic diagram illustrating the pin definitions of the male connector in a TYPE-C data cable in related technologies;

[0041] Figure 2 This is a schematic diagram of a one-to-many data cable in related technologies.

[0042] Figure 3 This is a schematic diagram of the control circuit provided in one embodiment of this application;

[0043] Figure 4 A schematic diagram of the circuit structure of a control circuit provided in an embodiment of this application;

[0044] Figure 5 A schematic diagram of the circuit structure of a control circuit provided in another embodiment of this application;

[0045] Figure 6 A schematic diagram of the circuit structure of the control circuit provided in another embodiment of this application. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0047] A data cable is a cable used to connect electronic devices for data transmission. It can transmit various types of data, including digital signals, audio signals, and video signals. The function of a data cable is to transfer data from one device to another, such as transferring data from a computer to a printer or mobile device. Common data cables include Lightning cables, USB Micro-USB cables, and USB Type-C cables.

[0048] Please refer to Figure 1 , Figure 1 The diagram illustrates, exemplarily, the pin definitions of the male connector in a USB-TYPE-C data cable according to related technologies. As is well known, a USB-TYPE-C data cable has two identical male connectors. For example... Figure 1 As shown, pin A5 (CC pin) of any male connector is the channel configuration pin; pins A4, A9, B4, and B9 (VBUS) are all bus power pins; pin A6 (D+) is the differential signal positive pin, and pin A7 (D-) is the differential signal negative pin.

[0049] Please refer to Figure 2 , Figure 2The diagram illustrates a schematic of a one-to-many data cable in the related art. This data cable includes a USB interface JA1, a Type-C interface JB1, a Micro-USB interface JB2, and a Lightning interface JB3. The USB interface JA1 is typically used to connect to a charger, while the Type-C interface JB1, Micro-USB interface JB2, and Lightning interface JB3 are typically used to connect to mobile phones, tablets, and other electronic devices. This data cable can charge three devices simultaneously. The term "one-to-many" refers to one charging input interface and multiple charging output interfaces.

[0050] However, Figure 2 The data cable shown is not compatible with USB Type-C chargers, making it impractical. Therefore, this application provides a control circuit to achieve a one-to-many port conversion for USB Type-C chargers, which is highly practical.

[0051] Please refer to Figure 3 , Figure 3 This is a schematic diagram of the control circuit provided in an embodiment of this application. Figure 3 As shown, the control circuit 100 is connected between the first interface JC1 and n second interfaces. The first interface JC1 is used to connect to a charging device, and each of the n second interfaces is used to connect to a power-consuming device. Here, n is an integer ≥ 2. The n second interfaces include the first second interface JD1, the second second interface JD2, ..., the nth second interface JDn.

[0052] The control circuit 100 includes a first switch branch 10, a second switch branch 20, a third switch branch 30, a current source branch 40, and a control unit 50. The second switch branch 20 is connected to the third switch branch 30, the channel configuration pin (CC pin) in the first interface JC1, and the channel configuration pins in the second interfaces (including the first second interface JD1, the second second interface JD2…the nth second interface JDn). The third switch branch 30 is also connected to the current source branch 40 and the channel configuration pins in the second interfaces. The first switch branch 10 is connected to the bus power pin (VBUS pin) in the first interface JC1 and the bus power pins in the second interfaces.

[0053] Specifically, when one of the n second interfaces is connected to the first electrical device, the control unit 50 controls the second switch branch 20 to establish a connection between the channel configuration pin in the first interface JC1 and the channel configuration pin in the first target interface, controls the third switch branch 30 to disconnect the current source branch 40 from the channel configuration pin in the first target interface, and controls the first switch branch 10 to establish a connection between the bus power pin in the first interface JC1 and the bus power pin in the first target interface. The first target interface is the second interface connected to the first electrical device, and the current source branch 40 is used to output a first current. This enables charging of the electrical device when one second interface is connected to it.

[0054] Taking the first target interface as the first second interface JD1 as an example, the first second interface JD1 is connected to the first device. Control unit 50 controls the second switch branch 20 to establish a connection between the channel configuration pins in the first interface JC1 and the channel configuration pins in the first second interface JD1. Simultaneously, control unit 50 controls the first switch branch 10 to establish a connection between the bus power pins in the first interface JC1 and the bus power pins in the first second interface JD1. Furthermore, control unit 50 controls the third switch branch 30 to disconnect the current source branch 40 from the channel configuration pins in the first second interface JD1. When the connection between the current source branch 40 and the channel configuration pins in the first second interface JD1 is disconnected, the current output by the current source branch 40 is not input to the channel configuration pins in the first second interface JD1. At this time, based on the PD protocol (Power Delivery Protocol, a communication protocol for USB interfaces), it can be determined that the charging device can quickly charge the device. Subsequently, when the connection between the channel configuration pin in the first interface JC1 and the channel configuration pin in the first second interface JD1 is established, and the connection between the bus power pin in the first interface JC1 and the bus power pin in the first second interface JD1 is established, the charging device can quickly charge the device, and the maximum charging speed can reach 240W.

[0055] When one of the n second interfaces is connected to the first electrical device, and another of the n second interfaces is connected to the second electrical device, the control unit 50 controls the second switch branch 20 to disconnect the channel configuration pins in the first interface JC1 from the channel configuration pins in the first target interface and the second target interface (i.e., disconnect the channel configuration pins in the first interface JC1 from the channel configuration pins in the first target interface, and disconnect the channel configuration pins in the first interface JC1 from the channel configuration pins in the second target interface), and controls the third switch branch 30 to establish the current source branch 40 with the first target interface. The connection between the channel configuration pins in the interface and the second target interface (i.e., establishing the connection between the current source branch 40 and the channel configuration pins of the first target interface, and establishing the connection between the current source branch 40 and the channel configuration pins of the second target interface), and controlling the first switch branch 10 to establish the connection between the bus power pins in the first interface JC1 and the bus power pins in the first and second target interfaces (i.e., establishing the connection between the bus power pins in the first interface JC1 and the bus power pins of the first target interface, and establishing the connection between the bus power pins in the first interface JC1 and the bus power pins of the second target interface). The second target interface is the second interface connected to the second electrical device. Thus, charging of the electrical device can be achieved when two second interfaces (including the first target interface and the second target interface) are connected to the electrical device. Furthermore, based on the same method, charging of the electrical device can be achieved when three or more second interfaces are connected to the electrical device.

[0056] Taking the first target interface as the first second interface JD1 and the second target interface as the second second interface JD2 as an example. At this time, the first second interface JD1 is connected to the first electrical device, and the second second interface JD2 is connected to the second electrical device. The control unit 50 controls the second switch branch 20 to disconnect the connection between the channel configuration pins of the first interface JC1 and the channel configuration pins of the first second interface JD1, and also disconnect the connection between the channel configuration pins of the first interface JC1 and the channel configuration pins of the second second interface JD2. Simultaneously, the control unit 50 controls the first switch branch 10 to establish the connection between the bus power pins of the first interface JC1 and the bus power pins of the first second interface JD1, and also establish the connection between the bus power pins of the first interface JC1 and the bus power pins of the second second interface JD2. Furthermore, the control unit 50 controls the third switch branch 30 to establish a connection between the current source branch 40 and the channel configuration pin of the first second interface JD1, and to establish a connection between the current source branch 40 and the channel configuration pin of the second second interface JD2. When the connection between the current source branch 40 and the channel configuration pin of the first second interface JD1 is established, the current output from the current source branch 40 is input to the channel configuration pin of the first second interface JD1. At this time, based on the PD protocol, it can be determined that the charging device cannot perform fast charging for the first device, but only normal charging (i.e., non-fast charging). Similarly, it can be concluded that the charging device can perform normal charging for the second device. Subsequently, when the connection between the bus power pin of the first interface JC1 and the bus power pin of the first second interface JD1 is established, and when the connection between the bus power pin of the first interface JC1 and the bus power pin of the second second interface JD2 is established, the charging device can simultaneously perform normal charging for both the first and second devices, typically at 5V.

[0057] In summary, this device enables charging of devices when connected to one or more second interfaces, achieving a one-to-many conversion process. It is also compatible with USB Type-C chargers, making it highly practical.

[0058] Please refer to Figure 4 , Figure 4 The diagram illustrates one circuit structure of the control circuit 100.

[0059] In one embodiment, such as Figure 4 As shown, the first switch branch 10 includes n switching transistors. The n switching transistors include the first switching transistor Q1, the second switching transistor Q2, ... the nth switching transistor Qn.

[0060] In this configuration, one of the n switching transistors is connected between the bus power pin of the first interface JC1 and the bus power pin of one of the n second interfaces, with each second switch corresponding to a different second interface. Specifically, the first switching transistor Q1 is connected between the bus power pin of the first interface JC1 and the bus power pin of the first second interface JD1, the second switching transistor Q2 is connected between the bus power pin of the first interface JC1 and the bus power pin of the second second interface JD2, and so on, with the nth switching transistor Qn connected between the bus power pin of the first interface JC1 and the bus power pin of the nth second interface JDn.

[0061] In one embodiment, the second switch branch 20 includes n first switches. The n first switches include a first first switch S21, a second first switch S22, ..., an nth first switch S2n.

[0062] In this configuration, one of the n first switches is connected between a channel configuration pin in the first interface JC1 and a channel configuration pin in one of the n second interfaces, with each first switch corresponding to a different second interface. Specifically, the first first switch S21 is connected between a channel configuration pin in the first interface JC1 and a channel configuration pin in the first second interface JD1, the second first switch S22 is connected between a channel configuration pin in the first interface JC1 and a channel configuration pin in the second second interface JD2, and so on, with the nth first switch S2n connected between a channel configuration pin in the first interface JC1 and a channel configuration pin in the nth second interface JDn.

[0063] In one embodiment, the third switch branch 30 includes n second switches. The n second switches include a first second switch S31, a second second switch S32, ..., an nth second switch S3n.

[0064] Among them, one of the n second switches is connected between the current source branch 40 and the channel configuration pin of one of the n second interfaces, and the second switch and the second interface are connected in a one-to-one correspondence. Specifically, the first second switch S31 is connected between the current source branch 40 and the channel configuration pin of the first second interface JD1, the second second switch S32 is connected between the current source branch 40 and the channel configuration pin of the second second interface JD2, and so on, the nth second switch S3n is connected between the current source branch 40 and the channel configuration pin of the nth second interface JDn.

[0065] In one embodiment, the current source branch 40 includes n current sources. The n current sources include a first current source Ip1, a second current source Ip2, ..., an nth current source Ipn.

[0066] Specifically, each current source is connected to a second switch in a one-to-one correspondence. The first current source Ip1 is connected to the first second switch S31, the second current source Ip2 is connected to the second second switch S32, and so on, with the nth current source Ipn connected to the nth second switch S3n.

[0067] In one embodiment, the control circuit 100 further includes a power supply unit 60.

[0068] The power supply unit 60 is connected to the current source branch 40, that is, the power supply unit 60 is connected to the first current source Ip1, the second current source Ip2, ... the nth current source Ipn respectively. The power supply unit 60 is used to provide the power supply voltage VCC to the first current source Ip1, the second current source Ip2, ... the nth current source Ipn.

[0069] In one embodiment, the control circuit 100 further includes a sixth switch S1 and a first resistor R1.

[0070] The first end of the first resistor R1 is connected to the channel configuration pins of the second switch branch 20 and the first interface JC1, respectively. The second end of the first resistor R1 is connected to the first end of the sixth switch S1, and the second end of the sixth switch S1 is grounded to GND.

[0071] In one embodiment, the third target interface among the n second interfaces is a USB Type-C interface. The third target interface is one of the n second interfaces.

[0072] The control unit 50 is further configured to acquire the voltage of the first node and determine that the third target interface is connected to the electrical equipment when the voltage of the first node is less than a first voltage threshold. The first node is the connection point between the channel configuration pins of the second switch branch 20, the third switch branch 30, and the third target interface. The first voltage threshold is a preset voltage threshold, which can be set according to actual application conditions; this embodiment does not impose specific limitations on it.

[0073] For example, suppose Figure 4 The first second interface JD1 is a USB Type-C interface. Therefore, the connection point between the channel configuration pins of the second switch branch 20, the third switch branch 30, and the third target interface is the first node CC_SNK1. The control unit 50 obtains the voltage of the first node CC_SNK1 and determines that the first second interface JD1 is connected to the power supply when the voltage of the first node CC_SNK1 is less than a first voltage threshold.

[0074] The following is based on Table 1. Figure 4The principle of the circuit structure shown will be explained, taking n=2 as an example. Furthermore, the first second interface JD1, the second second interface JD2, ..., the nth second interface JDn are all USB Type-C interfaces.

[0075] Table 1

[0076]

[0077] As shown in Table 1, when the control unit 50 is not powered, the sixth switch S1 is closed and all other switches are open.

[0078] When the first interface JC1 is connected to a charging device, and neither the first second interface JD1 nor the second second interface JD2 is connected to a device, a USB Type-C handshake can be established because the charging device is connected in series with the Rd resistor through the first interface JC1. A 5V power supply is established on the bus power pin of the first interface JC1, and the control unit 50 begins operation. By default (i.e., when neither the first second interface JD1 nor the second second interface JD2 is connected to a device), the sixth switch S1 is closed, the first first switch S21, the second first switch S22...the nth first switch S2n are all open, and the first second switch S31, the second second second switch S32...the nth second second switch S3n are all closed. At this time, the signals of the first first node CC_SNK1, the second first node CC_SNK2...the nth first node CC_SNKn are pulled high to the internal reference power supply VCC. The first first node CC_SNK1 is the connection point between the first first switch S21 and the channel configuration pin of the first second interface JD1, the second first node CC_SNK2 is the connection point between the second first switch S22 and the channel configuration pin of the second second interface JD2, and so on. The nth first node CC_SNKn is the connection point between the nth first switch S2n and the channel configuration pin of the nth second interface JDn.

[0079] Subsequently, when one of the first second interface JD1 and the second second interface JD2 is connected to the power-consuming device, for example, when the first second interface JD1 is connected to the power-consuming device, the control unit 50 can detect that the level of the first first node CC_SNK1 is pulled down to a certain level (corresponding to the voltage of the first first node CC_SNK1 in the above embodiment being less than the first voltage threshold). At this time, the control unit 50 controls the sixth switch S1 and the first second switch S31 to open, while controlling the first first switch S21 to close, and then controlling the first switch Q1 to close. At this time, the charging device can achieve fast charging for the power-consuming device, with a maximum charging speed of up to 240W.

[0080] When the control unit 50 detects that both the first second interface JD1 and the second second interface JD2 are connected to the devices, the control unit 50 immediately resets the fast charging state. Simultaneously, the control unit 50 controls the sixth switch S1, the first second switch S31, and the second second switch S32 to be closed, and controls the first first switch S21 and the second first switch S22 to be open. At this time, the charging device can simultaneously charge two devices (the devices connected to the first second interface JD1 and the second second interface JD2).

[0081] In one embodiment, such as Figure 5 As shown, the control circuit 100 has a fourth switch branch 70. The fourth switch branch 70 is connected to the differential signal positive pin and differential signal negative pin of the first interface JC1, and the differential signal positive pin and differential signal negative pin of the second interface (including the first second interface JD1, the second second interface JD2... the nth second interface JDn).

[0082] Specifically, when the first target interface is connected to the first electrical device, the control unit 50 controls the fourth switch branch 40 to establish a connection between the differential signal positive pin of the first interface JC1 and the differential signal positive pin of the first target interface, and to establish a connection between the differential signal negative pin of the first interface JC1 and the differential signal negative pin of the first target interface.

[0083] Taking the first target interface as the first second interface JD1 as an example. When the first second interface JD1 is connected to the first electrical device, the control unit 50 controls the fourth switch branch 40 to establish a connection between the differential signal positive pin of the first interface JC1 and the differential signal positive pin of the first second interface JD1, and to establish a connection between the differential signal negative pin of the first interface JC1 and the differential signal negative pin of the first second interface JD1.

[0084] In some embodiments, the fourth switch branch 40 includes n third switches, n fourth switches, and n fifth switches. The n third switches include a first third switch S41, a second third switch S42, ..., an nth third switch S4n. The n fourth switches include a first fourth switch S51, a second fourth switch S52, ..., an nth fourth switch S5n. The n fifth switches include a first fifth switch S61, a second fifth switch S62, ..., an nth fifth switch S63.

[0085] Among them, one of the n third switches is connected between the differential signal positive pin of the first interface JC1 and the differential signal positive pin of one of the n second interfaces, and the third switch is connected to the second interface in a one-to-one correspondence. Specifically, the first third switch S41 is connected between the differential signal positive pin of the first interface JC1 and the differential signal positive pin of the first second interface JD1, the second third switch S42 is connected between the differential signal positive pin of the first interface JC1 and the differential signal positive pin of the second second interface JD2, and so on, the nth third switch S4n is connected between the differential signal positive pin of the first interface JC1 and the differential signal positive pin of the nth second interface JDn.

[0086] In this configuration, one of the n fourth switches is connected between the differential signal negative pin of the first interface JC1 and the differential signal negative pin of one of the n second interfaces, with each fourth switch corresponding to a different second interface. Specifically, the first fourth switch S51 is connected between the differential signal negative pin of the first interface JC1 and the differential signal negative pin of the first second interface JD1, the second fourth switch S52 is connected between the differential signal negative pin of the first interface JC1 and the differential signal negative pin of the second second interface JD2, and so on, with the nth fourth switch S5n connected between the differential signal negative pin of the first interface JC1 and the differential signal negative pin of the nth second interface JDn.

[0087] In this configuration, one of the n fifth switches is connected between the positive and negative differential signal pins of one of the n second interfaces, with each fifth switch corresponding to a different second interface. Specifically, the first fifth switch S61 is connected between the positive and negative differential signal pins of the first second interface JD1, the second fifth switch S62 is connected between the positive and negative differential signal pins of the second second interface JD2, and so on, with the nth fifth switch S6n connected between the positive and negative differential signal pins of the nth second interface JDn.

[0088] The principle of the fourth switch branch 40 will be explained below with reference to Table 2, taking n=2 as an example.

[0089] Table 2

[0090]

[0091] As shown in Table 2, when the control unit 50 is not powered, all switches in the fourth switch branch 40 are in the open state.

[0092] When the first interface JC1 is connected to a charging device and neither the first second interface JD1 nor the second second interface JD2 is connected to a power-consuming device, the first third switch S41, the second third switch S42... the nth third switch S4n are in the open state, the first fourth switch S51, the second fourth switch S52... the nth fourth switch S5n are all in the open state, and the first fifth switch S61, the second fifth switch S62... the nth fifth switch S6n are in the closed state.

[0093] When one of the first second interface JD1 or the second second interface JD2 is connected to the electrical device, for example, when the first second interface JD1 is connected to the electrical device, the first third switch S41 is closed, the first fourth switch S51 is closed, and the first fifth switch S61 is open. The other switches in the fourth switch branch 40 remain unchanged. At this time, since the first third switch S41 and the first fourth switch S51 are closed, data transmission can be achieved between the charging device and the electrical device.

[0094] When the control unit 50 detects that both the first second interface JD1 and the second second interface JD2 are connected to the electrical equipment, the first third switch S41, the second third switch S42...thenth third switch S4n are in the open state, the first fourth switch S51, the second fourth switch S52...thenth fourth switch S5n are all in the open state, and the first fifth switch S61, the second fifth switch S62...thenth fifth switch S6n are in the closed state. This stops data transmission.

[0095] In one embodiment, the fourth target interface among the n second interfaces is a USB Micro-B interface or a Lightning interface. The fourth target interface is one of the n second interfaces.

[0096] Specifically, the power supply unit 60 is used to output a second current to the bus power pin in the fourth target interface. The control unit 50 is also used to acquire the voltage of the bus power pin in the fourth target interface, and determine that the fourth target interface is connected to the power-consuming device when the voltage of the bus power pin in the fourth target interface is less than a second voltage threshold.

[0097] The second voltage threshold is a preset voltage threshold, which can be set according to the actual application. This application embodiment does not impose specific limitations on it. The second current is a preset current, which can be set according to the actual application. This application embodiment does not impose specific limitations on it.

[0098] Please refer to Figure 6 , Figure 6 The example illustrates yet another circuit structure for the control circuit. (Using...) Figure 6The first second interface JD1 in the example is used as the fourth target interface for illustration.

[0099] The power supply unit 60 outputs a second current to the bus power pin of the first second interface JD1. Then, when the first second interface JD1 is connected to a device, the second current acts on the device, causing the voltage of the bus power pin in the first second interface JD1 to be pulled low. Consequently, the voltage of the bus power pin in the first second interface JD1 falls below a second voltage threshold. When the control unit 50 detects that the voltage of the bus power pin in the first second interface JD1 is below the second voltage threshold, it can determine that the first second interface JD1 is connected to a device.

[0100] This application embodiment also provides another control circuit. The control circuit is connected between a first interface and n second interfaces. The first interface is used to connect to a charging device, and each of the n second interfaces is used to connect to a power-consuming device. Here, n is an integer ≥ 2.

[0101] The control circuit includes a chip and a first switch branch. The chip includes a second switch branch, a third switch branch, a current source branch, and a control unit. The first switch branch, second switch branch, third switch branch, current source branch, and control unit can be referred to the detailed description of the first switch branch 10, second switch branch 20, third switch branch 30, current source branch 40, and control unit 50 in the above embodiments, and will not be repeated here.

[0102] The difference between the control circuit in this embodiment and the control circuit 100 in the above embodiment is that the first switch branch 10, the second switch branch 20, the third switch branch 30, the current source branch 40, and the control unit 50 are combined into a chip. The various pins of the chip are connected to the first switch branch 10 and the fourth switch branch 40. Figure 4 Taking the circuit structure shown as an example, the chip's pins include VB1, GD1, GD2...GDn, CC_SRC, CC_SNK1, CC_SNK2...CC_SNKn, and GND. VB1 is used to supply power to power supply unit 60. GD2...GDn pins are used to control the first switch Q1, the second switch Q2...the nth switch Qn. CC_SNK1, CC_SNK2...CC_SNKn pins are used to detect whether the second interface is connected to the device. CC_SRC pin is used to connect to the channel configuration pin of the first interface JC1. GND pin is used for grounding.

[0103] This application also provides a data cable. The data cable includes a first interface, n second interfaces, and a control circuit as described in any embodiment of this application. The control circuit is connected between the first interface and the n second interfaces, where n is an integer ≥ 2. In some embodiments, the first interface is a USB Type-C interface.

[0104] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them; under the concept of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of this application as described above, which are not provided in detail for the sake of brevity; although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A control circuit, characterized in that, The control circuit is connected between a first interface and n second interfaces. The first interface is used to connect to a charging device, and each of the n second interfaces is used to connect to a power-consuming device, where n is an integer ≥ 2. The control circuit includes: First switch branch, second switch branch, third switch branch, current source branch and control unit; The second switch branch is connected to the third switch branch, the channel configuration pin in the first interface, and the channel configuration pin in the second interface, respectively. The third switch branch is also connected to the current source branch and the channel configuration pin in the second interface, respectively. The first switch branch is connected to the bus power pin in the first interface and the bus power pin in the second interface, respectively. Furthermore, the first switch branch, the second switch branch, and the third switch branch are all connected to the control unit. When one of the n second interfaces is connected to the first electrical device, the control unit controls the second switch branch to establish a connection between the channel configuration pin in the first interface and the channel configuration pin in the first target interface, controls the third switch branch to disconnect the current source branch from the channel configuration pin in the first target interface, and controls the first switch branch to establish a connection between the bus power pin in the first interface and the bus power pin in the first target interface, wherein the first target interface is the second interface connected to the first electrical device, and the current source branch is used to output a first current; When one of the n second interfaces is connected to the first electrical device, and another of the n second interfaces is connected to the second electrical device, the control unit controls the second switch branch to disconnect the channel configuration pin in the first interface from the channel configuration pin in the first target interface and the channel configuration pin in the second target interface, controls the third switch branch to establish the connection between the current source branch and the channel configuration pin in the first target interface and the second target interface, and controls the first switch branch to establish the connection between the bus power pin in the first interface and the bus power pin in the first target interface and the second target interface, wherein the second target interface is the second interface connected to the second electrical device.

2. The control circuit according to claim 1, characterized in that, The second switch branch includes n first switches; One of the n first switches is connected between the channel configuration pin of the first interface and the channel configuration pin of one of the n second interfaces, and the first switch and the second interface are connected in a one-to-one correspondence.

3. The control circuit according to claim 1, characterized in that, The third switch branch includes n second switches; One of the n second switches is connected between the current source branch and the channel configuration pin of one of the n second interfaces, and the second switch and the second interface are connected in a one-to-one correspondence.

4. The control circuit according to claim 3, characterized in that, The current source branch includes n current sources; The current source is connected to the second switch in a one-to-one correspondence.

5. The control circuit according to claim 1, characterized in that, The first switching branch includes n switching transistors; One of the n switching transistors is connected between the bus power pin of the first interface and the bus power pin of one of the n second interfaces, and the second switch is connected to the second interface in a one-to-one correspondence.

6. The control circuit according to claim 1, characterized in that, The control circuit further includes a fourth switch branch, which is connected to the differential signal positive pin and differential signal negative pin of the first interface and the differential signal positive pin and differential signal negative pin of the second interface, respectively. When the first target interface is connected to the first electrical device, the control unit is used to control the fourth switch branch to establish a connection between the differential signal positive pin of the first interface and the differential signal positive pin of the first target interface, and to establish a connection between the differential signal negative pin of the first interface and the differential signal negative pin of the first target interface.

7. The control circuit according to claim 6, characterized in that, The fourth switch branch includes n third switches, n fourth switches, and n fifth switches; One of the n third switches is connected between the differential signal positive pin of the first interface and the differential signal positive pin of one of the n second interfaces, and the third switch is connected to the second interface in a one-to-one correspondence. One of the n fourth switches is connected between the differential signal negative pin of the first interface and the differential signal negative pin of one of the n second interfaces, and the fourth switch is connected to the second interface in a one-to-one correspondence. One of the n fifth switches is connected between the differential signal positive pin and the differential signal negative pin of one of the n second interfaces, and the fifth switch is connected to the second interface in a one-to-one correspondence.

8. The control circuit according to claim 1, characterized in that, The third target interface among the n second interfaces is a USB Type-C interface; The control unit is also used to acquire the voltage of the first node and determine that the third target interface has been connected to the electrical equipment when the voltage of the first node is less than a first voltage threshold, wherein the first node is the connection point between the channel configuration pins of the second switch branch, the third switch branch and the third target interface.

9. The control circuit according to claim 1, characterized in that, The fourth target interface among the n second interfaces is either a USB Micro-B interface or a Lightning interface; The control circuit also includes a power supply unit, which is used to output a second current to the bus power pin in the fourth target interface. The control unit is also used to acquire the voltage of the bus power pin in the fourth target interface, and determine that the fourth target interface is connected to the power-consuming equipment when the voltage of the bus power pin in the fourth target interface is less than the second voltage threshold.

10. The control circuit according to any one of claims 1-9, characterized in that, The control circuit also includes a sixth switch and a first resistor; The first end of the first resistor is connected to the channel configuration pins of the second switch branch and the first interface, respectively. The second end of the first resistor is connected to the first end of the sixth switch, and the second end of the sixth switch is grounded.

11. A control circuit, characterized in that, The control circuit is connected between a first interface and n second interfaces. The first interface is used to connect to a charging device, and each of the n second interfaces is used to connect to a power-consuming device, where n is an integer ≥ 2. The control circuit includes: The chip includes a first switch branch, wherein the chip comprises a second switch branch, a third switch branch, a current source branch, and a control unit; The second switch branch is connected to the third switch branch, the channel configuration pin in the first interface, and the channel configuration pin in the second interface, respectively. The third switch branch is also connected to the current source branch and the channel configuration pin in the second interface, respectively. The first switch branch is connected to the bus power pin in the first interface and the bus power pin in the second interface, respectively. When one of the n second interfaces is connected to the first electrical device, the control unit controls the second switch branch to establish a connection between the channel configuration pin in the first interface and the channel configuration pin in the first target interface, controls the third switch branch to disconnect the current source branch from the channel configuration pin in the first target interface, and controls the first switch branch to establish a connection between the bus power pin in the first interface and the bus power pin in the first target interface, wherein the first target interface is the second interface connected to the first electrical device, and the current source branch is used to output a first current; When one of the n second interfaces is connected to the first electrical device, and another of the n second interfaces is connected to the second electrical device, the control unit controls the second switch branch to disconnect the channel configuration pin in the first interface from the channel configuration pin in the first target interface and the channel configuration pin in the second target interface, controls the third switch branch to establish the connection between the current source branch and the channel configuration pin in the first target interface and the second target interface, and controls the first switch branch to establish the connection between the bus power pin in the first interface and the bus power pin in the first target interface and the second target interface, wherein the second target interface is the second interface connected to the second electrical device.

12. A data cable, characterized in that, It includes a first interface, n second interfaces, and a control circuit as described in any one of claims 1-11, wherein the control circuit is connected between the first interface and the n second interfaces, where n is an integer ≥ 2.

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