CN215418876U

CN215418876U - Split type double-port rechargeable USB concentrator

Info

Publication number: CN215418876U
Application number: CN202121134923.8U
Authority: CN
Inventors: 王黎敏; 华敏; 张帅杰; 崔治学; 何伟
Original assignee: Keboda Technology Co ltd
Current assignee: Keboda Technology Co ltd
Priority date: 2021-05-25
Filing date: 2021-05-25
Publication date: 2022-01-04
Anticipated expiration: 2031-05-25

Abstract

A split type double-port rechargeable USB hub comprises a USB hub main body part, a first USB interface part and a second USB interface part, wherein the USB hub main body part, the first USB interface part and the second USB interface part are of split type structures; the USB concentrator main body part is connected with the first USB interface part through a first connecting line, and the USB concentrator main body part is connected with the second USB interface part through a second connecting line. The utility model can flexibly arrange the position of the output port of the USB hub, and is convenient for a user to use the USB hub in a long distance.

Description

Split type double-port rechargeable USB concentrator

Technical Field

The utility model relates to a USB hub technology.

Background

With the popularization of large screen car machines and the development of mobile internet, the demand for interconnection between mobile electronic devices and car machines is increasing, and the traditional dual-port vehicle-mounted rechargeable USB HUB is of an integrated structure, in which two USB interfaces are integrated on the same PCB and are installed in the interior of an automobile together, so that rear passengers cannot use some functions of the car machines (such as Carplay function and carrife function) due to too long distance. Fig. 1 shows a schematic connection diagram of an integrated dual-port rechargeable USB hub 100, a vehicle 200 and a mobile electronic device 300, as shown in fig. 1, the integrated dual-port rechargeable USB hub 100 has a first USB interface 101 and a second USB interface 102, the first USB interface 101 and the second USB interface 102 are respectively connected to the two mobile electronic devices 300 through connecting wires, and the USB hub 100 is connected to the vehicle 200 through HSD data lines.

With the popularization of large screen car machines and the development of mobile internet, the demand for interconnection between mobile devices and car machines is growing vigorously, and a single vehicle-mounted USB charging port (USB DCP) cannot transmit data and is gradually eliminated. However, most vehicle-mounted USB data interfaces (USB SDP) of mass-produced vehicles only have a maximum current output capacity of about 1A, and are gradually careless for the increasingly large battery capacity of smart phones. In view of this, a charging downlink interface (USB CDP) having both a large-current charging capability (equal to or greater than 1.5A) and a data transmission capability will become a standard for future vehicle models.

Fig. 2 shows a schematic circuit diagram of a conventional dual port rechargeable USB HUB (USB HUB). The technical scheme shown in fig. 2 is described in three aspects of power supply, data and temperature control.

Power supply: the voltage VBAT (DC 12V) introduced from the power connector becomes the main power VIN for supplying power to the whole PCB after being processed by the input protection and filter circuit. The two paths of outputs are independent, a 12V power supply is converted into VBUS of about 5V through a DC-DC converter, then overcurrent protection and line loss compensation of an output port (namely a USB interface, in the example of fig. 2, the output port is a Type-C interface) are executed through respective charging port controllers, and the outputs of the charging port controllers are connected with a Type-C protocol controller and used for achieving functions of port output, broadcast output current capability and the like. The 3.3V power supply rail required by the data and temperature control part is generated by one LDO from one 5V power supply rail.

Data: in the prior art, a USB Hub chip is used, and a vehicle machine is connected to an uplink port, and two output ports are connected to two downlink ports, so that USB2.0 bidirectional data communication between the vehicle machine and a mobile device can be realized.

Temperature control: the MCU judges the current temperature of the product by collecting the voltage of the external NTC voltage division network, and derates or shuts down the product according to an agreed strategy to prevent the shell temperature from exceeding a limit value. Derating is realized by controlling an external CC configuration resistor of the Type-C protocol controller, and turning off is realized by disabling the charging port controller through an enabling circuit.

The main disadvantages of the above design are:

1. two Type-C interfaces and concentrator main control circuit are located same PCB circuit board, consequently can only be arranged in same department, and the center console area is taken up to general. The width of the two Type-C interfaces is larger, so that the occupied area is larger when the two Type-C interfaces are intensively arranged on a central control panel, and the design flexibility and the attractiveness of a central control console are influenced;

2. when two Type-C mouths were all located the row of controlling in the front, the back row passenger was restricted to the front seat and sheltered from or USB cable length, was difficult to be connected to the car machine through the USB concentrator, leads to the back row passenger can't use the USB concentrator.

Disclosure of Invention

The technical problem to be solved by the utility model is to provide a split type dual-port rechargeable USB hub which can flexibly arrange the position of an output port and is convenient for a user to use remotely.

The split type dual-port rechargeable USB hub comprises a USB hub main body part, a first USB interface part and a second USB interface part, wherein the USB hub main body part, the first USB interface part and the second USB interface part are of split type structures; the USB concentrator main body part is connected with the first USB interface part through a first connecting line, and the USB concentrator main body part is connected with the second USB interface part through a second connecting line.

The split type dual-port rechargeable USB hub provided by the embodiment of the utility model is divided into a USB hub main body part, a first USB interface part and a second USB interface part, and the three parts can be respectively designed into PCBs and shells with different shapes and sizes according to requirements, so that the positions of output ports of the USB hub can be flexibly arranged, and a user can conveniently use the USB hub in a long distance.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 shows a connection schematic diagram of an integrated dual-port rechargeable USB hub and a car machine and a mobile electronic device.

Fig. 2 shows a schematic circuit diagram of a conventional integrated dual-port rechargeable USB hub.

Fig. 3 is a schematic diagram illustrating a split dual-port rechargeable USB hub and a vehicle and mobile electronic device according to an embodiment of the present invention.

Fig. 4 shows a circuit schematic diagram of a hub main control circuit of a split dual port rechargeable USB hub according to an embodiment of the present invention.

Fig. 5 is a circuit diagram of the first USB interface according to an embodiment of the present invention.

Fig. 6 is a schematic structural diagram of an HSD connector of the first USB interface according to an embodiment of the present invention.

Detailed Description

The utility model is further described below with reference to the accompanying drawings.

Fig. 3 is a schematic diagram illustrating a split dual-port rechargeable USB hub and a vehicle and mobile electronic device according to an embodiment of the present invention. Referring to fig. 3, a dual-port detachable rechargeable USB hub according to an embodiment of the present invention includes a USB hub main body 1, a first USB interface 21, and a second USB interface 22, wherein the USB hub main body 1, the first USB interface 21, and the second USB interface 22 are detachable to form three separate components, each of which has a housing and a PCB circuit board, so that the PCB circuit board and the housing can be designed to have different shapes and sizes according to their requirements.

The USB hub main body portion 1 is connected to the first USB interface portion 21 via a first connection line 31, and the USB hub main body portion 31 is connected to the second USB interface portion 22 via a second connection line 32. The first USB interface 21 and the second USB interface 22 are respectively connected to the two mobile electronic devices 300 through a connecting line, and the USB hub 1 is connected to the car machine 200 through an HSD data line.

In this embodiment, HSD cables are used as the first connection line 31 and the second connection line 32, and the length of the cables is determined according to the arrangement positions of the first USB interface 21 and the second USB interface 22, and the maximum length of the cables can reach 1.5 meters, so as to meet the requirement of installation at the armrest box.

In this embodiment, the split type dual-port rechargeable USB hub is a vehicle-mounted split type dual-port rechargeable USB hub; the USB concentrator main body 1 and the first USB interface 21 are respectively disposed on a console in the vehicle, and the second USB interface 22 is disposed on a console box in the vehicle, so as to facilitate the design of console, and enable the rear passengers to use the USB concentrator to connect to the vehicle 200 through the second USB interface 22.

Fig. 4 shows a circuit schematic diagram of a hub main control circuit of a split dual port rechargeable USB hub according to an embodiment of the present invention. Fig. 5 shows a schematic circuit diagram of the first USB interface portion 21 according to an embodiment of the present invention, fig. 6 shows a schematic circuit diagram of the HSD connector 23 of the first USB interface portion 21 according to an embodiment of the present invention, and the circuit structure and principle of the second USB interface portion 22 are completely the same as those of the first USB interface portion 21, so that only the first USB interface portion 21 and its HSD connector 23 are illustrated.

Please refer to fig. 5. Each USB interface section includes an HSD connector 23, a switching circuit 24, a Type-C protocol controller 25, and a Type-C interface 26. The first PIN1, the second PIN2, and the third PIN3 of the HSD connector 23 are connected to the DP PIN, the DM PIN, and the GND PIN of the Type-C interface 26, respectively. A first conduction terminal of the switch circuit 24 is connected to the fourth PIN4 of the HSD connector 23, and a second conduction terminal of the switch circuit 24 is connected to the VBUS PIN of the Type-C interface 26. The control output pin of the Type-C protocol controller 25 is connected with the control end of the switch circuit 24, and the CC1 pin and the CC 2pin of the Type-C protocol controller 25 are respectively connected with the CC1 pin and the CC 2pin of the Type-C interface 26.

In the present embodiment, the switch circuit 24 includes a PMOS transistor, and a gate, a drain, and a source of the PMOS transistor respectively constitute a control terminal, a first conducting terminal, and a second conducting terminal of the switch circuit.

In the present embodiment, the HSD connector 23 is an HSD connector in the form of 4PIN +2PIN, the internal four PINs (i.e. the aforementioned PINs 1 to 4) correspond to a downstream HSD connector in the form of 4PIN on the USB hub body 1 to be described later, the external two PINs are a fifth PIN5 and a sixth PIN6, and the fifth PIN5 and the sixth PIN6 of the HSD connector 23 are respectively connected to the light line KL58 and the battery negative electrode KL31 of the vehicle. Each USB interface unit includes a backlight circuit 27, the positive terminal of the backlight circuit 27 is connected to the fifth PIN5 of the HSD connector, and the negative terminal of the backlight circuit 27 is connected to the sixth PIN6 of the HSD connector 23. Therefore, the two USB interface parts can be turned on for illumination along with the light of the whole vehicle, and the night identification is facilitated. PIN5S is shown in fig. 6 as a cable shield.

Please refer to fig. 5. The USB hub body section includes a hub host control circuit 10, a first downstream HSD connector 13, and a second downstream HSD connector 14.

The hub main control circuit 10 is connected to the first downlink HSD connector 13 and the second downlink HSD connector 14, the first downlink HSD connector 13 and the second downlink HSD connector 14 are connected to the HSD connectors of the first USB interface 21 and the second USB interface 22 through connecting wires, and the hub main control circuit is configured to control the first USB interface 21 and the second USB interface 22 to implement charging and data communication.

In the present embodiment, the Hub main control circuit 10 includes a power supply circuit, a USB Hub chip 12, an MCU15, a downstream connection diagnostic circuit 16, a temperature detection circuit 17, an enable circuit 18, and an upstream signal connector 19.

The power circuit is connected with the first downlink HSD connector 13 and the second downlink HSD connector 14, respectively, and the USB Hub chip 12 is connected with the first downlink HSD connector 13 and the second downlink HSD connector 14, respectively, and is in communication connection with the MCU 15.

The downlink connection diagnosis circuit 16 is connected to the first downlink HSD connector 13 and the second downlink HSD connector 14, and is in communication connection with the MCU15, the downlink connection diagnosis circuit 16 is configured to diagnose whether the connection between the first downlink HSD connector 13 and the first USB interface 21 and the connection between the second downlink HSD connector 14 and the second USB interface 22 are normal, and transmit the diagnosis information to the USB Hub chip 12 through the MCU15, and the USB Hub chip 12 reports the received diagnosis information to the vehicle 200, thereby completing the whole diagnosis process of the integrated dual-port vehicle-mounted rechargeable USB Hub. The circuit configuration of the downstream link diagnostic circuit 16 is prior art and will not be described in detail here.

The power circuit includes a power connector 110, an input protection and filtering circuit 111, an LDO regulator 112, a first DC-DC converter 113, a second DC-DC converter 114, a first charging port controller 115, and a second charging port controller 116.

The input end of the power connector 110 is used for connecting a power supply (in this embodiment, a vehicle-mounted storage battery), the output end of the power connector 110 is connected with the input end of the input protection and filter circuit, and the output end of the input protection and filter circuit 111 is connected with the input ends of the first DC-DC converter 113 and the second DC-DC converter 114 respectively; the enable terminal of the power connector 110 is connected to the control terminal of the first DC-DC converter 113 and the control terminal of the second DC-DC converter, respectively, to enable the first DC-DC converter 113 and the second DC-DC converter 114. The output of the first DC-DC converter 113 is connected to the power input of the first charge port controller 115, and the power output of the first charge port controller 115 is connected to the first downlink HSD connector 13; the output end of the second DC-DC converter 114 is connected to the input end of the LDO regulator 112 and the power input end of the second charging port controller 116, respectively, and the power output end of the second charging port controller 11 is connected to the second downlink HSD connector 14; the output terminal of the LDO regulator 112 is connected to the power input terminal of the MCU15 and the power input terminal of the USB Hub chip 12, respectively.

The power connector 110 takes 12V power from the vehicle-mounted storage battery, and is respectively connected with the first DC-DC converter 113 and the second DC-DC converter 114 after anti-reversion and filtering processing of the input protection and filtering circuit 111, and the first DC-DC converter 113 and the second DC-DC converter 114 convert the 12V into a 5V power rail required by the USB2.0 (due to the existence of a cable compensation function, the actual voltage of the 5V power rail is between 4.97 and 5.25V). The 5V power supply rail is sent to each charging port controller, and functions of overcurrent protection, short-circuit protection, current-limiting control and the like are realized by the charging port controllers. In this embodiment, each charging port controller has a cable compensation function, and the output voltage of the DC-DC converter can be adjusted to compensate for the voltage drop caused by the long HSD cable, so that the output voltages at the first and second USB interface units can be ensured to meet the USB-IF requirement. Each charging port controller connects the controlled 5V power output (VBUS) to the corresponding downlink HSD connector, and the GND network on the USB hub main body part is connected to the other pin of the downlink HSD connector, and the two form the USB 5V power required by the USB interface part. Each USB interface part obtains a USB 5V power supply from the USB hub main body part through the HSD connector, the two parts share the same ground, the VBUS is connected with a switch circuit 24, and the switch circuit 24 is controlled by a Type-C protocol controller 25 to realize controlled conduction. The charging protocol is controlled by the Type-C protocol controller 25 and the USB Hub chip 12, and can support the common Type-C rev 1.3, BC1.2, YD/T1591-.

The upstream data transmission pin of the USB Hub chip 12 on the USB Hub main body 1 is connected to the upstream signal connector 19 through an upstream data line, and the upstream signal connector 19 is connected to the in-vehicle device 200 through an HSD cable, so as to implement upstream port USB communication. Two downlink ports of the USB Hub chip 12 are connected to the remaining two pins of the downlink HSD connector, and the first and second downlink HSD connectors are connected to the first and second USB interface parts through HSD cables, respectively. In this embodiment, the USB Hub chip 12 is provided with a USB PHY-Boost technology, which can enhance the USB signal quality, so that the quality of the USB2.0 signal can be guaranteed even after the USB2.0 signal is transmitted through a cable of 1.5 meters.

The output end of the temperature detection circuit 17 is connected with the signal input end of the MCU15, and the temperature detection circuit 17 is used for detecting the ambient temperature of the MCU. A first input terminal and a second input terminal of the enable circuit 18 are connected to the MCU15 and the USB Hub chip 12, respectively, and a first output terminal and a second output terminal of the enable circuit 18 are connected to a control input terminal of the first charging port controller 115 and a control input terminal of the second charging port controller 116, respectively. In the present embodiment, the enable circuit 18 is formed by an and gate, and when the output signals of the MCU15 and the USB Hub chip 12 are both at a high level, the enable circuit 18 outputs a high level to the control input terminal of the first charging port controller 115 and the control input terminal of the second charging port controller 116, so that the first charging port controller 115 and the second charging port controller 116 enable charging of the two USB interface portions, respectively. The MCU15 may implement derating functionality. In this embodiment, when the temperature reaches the set threshold, the MCU15 controls the external resistor network connected to the ILIM _ H pins of the first and second charging port controllers with the model number SN1607056RTER through GPIO to adjust the maximum allowable output current value, thereby implementing the high-temperature derating function of the port.

The split type dual-port rechargeable USB HUB provided by the embodiment of the utility model is divided into a USB HUB main body part, a first USB interface part and a second USB interface part, the three parts can be respectively designed into PCBs and shells with different shapes and sizes according to requirements, and the USB interface part can be arranged at a distance of more than 1.5m away from the HUB HUB main body, so that the position of an output port of the USB HUB can be flexibly arranged, and a user can conveniently use a vehicle machine remotely through the USB HUB.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the utility model. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A split type double-port chargeable USB concentrator is characterized by comprising a USB concentrator main body part, a first USB interface part and a second USB interface part, wherein the USB concentrator main body part, the first USB interface part and the second USB interface part are in split type structures; the USB hub main body part is connected with the first USB interface part through a first connecting line, and the USB hub main body part is connected with the second USB interface part through a second connecting line.

2. The split dual-port rechargeable USB hub according to claim 1, wherein each USB interface section comprises an HSD connector, a switching circuit, a Type-C protocol controller, and a Type-C interface;

a first pin, a second pin and a third pin of the HSD connector are respectively connected with a DP pin, a DM pin and a GND pin of the Type-C interface;

a first conduction end of the switch circuit is connected with a fourth pin of the HSD connector, and a second conduction end of the switch circuit is connected with a VBUS pin of the Type-C interface;

the control output pin of the Type-C protocol controller is connected with the control end of the switch circuit, and the CC1 pin and the CC 2pin of the Type-C protocol controller are respectively connected with the CC1 pin and the CC 2pin of the Type-C interface.

3. The split type dual-port rechargeable USB hub according to claim 2, wherein the switching circuit comprises a PMOS transistor, and a gate, a drain and a source of the PMOS transistor respectively form a control terminal, a first conduction terminal and a second conduction terminal of the switching circuit.

4. The split dual port rechargeable USB hub of claim 2, wherein the split dual port rechargeable USB hub is an onboard split dual port rechargeable USB hub;

the fifth pin and the sixth pin of the HSD connector are respectively connected with a light ray KL58 of a vehicle and a battery cathode KL 31;

each USB interface part comprises a backlight circuit, the positive electrode end of the backlight circuit is connected with the fifth pin of the HSD connector, and the negative electrode end of the backlight circuit is connected with the sixth pin of the HSD connector.

5. The split dual port rechargeable USB hub of claim 1, wherein the split dual port rechargeable USB hub is an onboard split dual port rechargeable USB hub;

the USB concentrator main body part and the first USB interface part are respectively arranged on a center console in the automobile, and the second USB interface part is arranged on a central armrest box in the automobile.

6. The split dual port rechargeable USB hub of claim 1, wherein the USB hub body section comprises a hub host control circuit, a first downstream HSD connector and a second downstream HSD connector;

the hub main control circuit is connected with the first downlink HSD connector and the second downlink HSD connector respectively, the first downlink HSD connector and the second downlink HSD connector are connected with the first USB interface part and the second USB interface part respectively through connecting lines, and the hub main control circuit is used for controlling the first USB interface part and the second USB interface part to realize charging and data communication.

7. The split dual port rechargeable USB Hub according to claim 6, wherein the Hub main control circuit comprises a power supply circuit, a USB Hub chip, an MCU, a downlink connection diagnostic circuit;

the power circuit is respectively connected with the first downlink HSD connector and the second downlink HSD connector, and the USB Hub chip is respectively connected with the first downlink HSD connector and the second downlink HSD connector and is in communication connection with the MCU;

the downlink connection diagnosis circuit is connected with the first downlink HSD connector and the second downlink HSD connector respectively, and is in communication connection with the MCU, and the downlink connection diagnosis circuit is used for diagnosing whether the connection between the first downlink HSD connector and the first USB interface part and the connection between the second downlink HSD connector and the second USB interface part are normal or not.

8. The split dual port rechargeable USB hub of claim 7, wherein the power circuit comprises a power connector, an input protection and filtering circuit, an LDO regulator, a first DC-DC converter, a second DC-DC converter, a first charging port controller, and a second charging port controller;

the input end of the power supply connector is used for connecting a power supply, the output end of the power supply connector is connected with the input end of the input protection and filter circuit, and the output end of the input protection and filter circuit is respectively connected with the input ends of the first DC-DC converter and the second DC-DC converter; an output of said first DC-DC converter is connected to a power input of said first charge port controller, a power output of said first charge port controller is connected to said first downstream HSD connector; an output end of the second DC-DC converter is connected to an input end of the LDO regulator and a power input end of the second charge port controller, respectively, and a power output end of the second charge port controller is connected to the second downlink HSD connector; and the output end of the LDO voltage stabilizer is respectively connected with the power input end of the MCU and the power input end of the USB Hub chip.

9. The split dual port rechargeable USB hub according to claim 8, wherein the hub main control circuit comprises a temperature detection circuit and an enable circuit;

the output end of the temperature detection circuit is connected with the signal input end of the MCU, and the temperature detection circuit is used for detecting the ambient temperature of the MCU;

the first input end and the second input end of the enabling circuit are respectively connected with the MCU and the USB Hub chip, and the first output end and the second output end of the enabling circuit are respectively connected with the control input end of the first charging port controller and the control input end of the second charging port controller.

10. The split dual port rechargeable USB Hub according to claim 7, wherein the Hub host control circuit comprises an upstream signal connector connected to an upstream data transfer pin of the USB Hub chip.