Universal serial bus (USB) protocol converter based on full-function USB-C interface or lightning interface

Abstract

The utility model discloses a universal serial bus (USB) protocol converter based on a full-function universal serial bus-C (USB-C) interface or a lightning interface, which is characterized in that PD protocol power supply of a first TYPE-C interface is decoy VBUS to be 15V fixed voltage through a first TYPE-C interface, an onboard USB serial port protocol conversion chip and a first PD protocol decoy chip at the same time, then the voltage is boosted to be 24V through a boosting chip, and the 24V fixed voltage is output. According to the invention, by designing a first TYPE-C interface and loading a second PD protocol decoy chip, 15V is reduced to 12V through a voltage reduction chip to be output, the functions of communication and 12V / 24V external power supply can be realized by only using one USB line, the voltage is converted to stable 5V through a voltage boosting and reducing chip to be output, the functions of communication and power supply can be realized, and by designing a second TYPE-C interface and loading a second PD protocol decoy chip, the communication and power supply functions can be realized. The power supply device is used for being connected with a power bank with a PD protocol to convert voltage into 5V / 12V / 24V, and the power supply problem of a computer without a full-function USB-C or thunder and lightning interface is solved.

Description

Technical Field

[0001] The utility model relates to the field of computer communications, and in particular to a USB protocol converter based on a full-function USB-C interface or a lightning interface. Background Art

[0002] There are many USB to TTL / 485 / 232 protocol converters on the market, but none of them provide 12V or 24V power output function. When testing industrial and agricultural sensors, since industrial and agricultural sensors are almost all powered by 12V or above, a huge experimental DC power supply needs to be prepared to provide 12V or 24V power to the sensors, which is extremely inconvenient to use. In addition, when there is no power socket around, such as testing 12V or 24V industrial and agricultural sensors outdoors, such as testing soil sensors, there is no convenient way to power the sensors, which makes outdoor testing extremely cumbersome. Summary of the invention

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a USB protocol converter based on a full-function USB-C interface or a Thunderbolt interface.

[0004] The purpose of this utility model is achieved through the following technical solutions:

[0005] The utility model provides a USB protocol converter based on a full-function USB-C interface or a Thunderbolt interface, comprising a first TYPE-C interface, a first PD power decoy chip, a USB serial port protocol conversion chip, a power management unit, a communication output interface, a 5V power output interface, a 12V power output interface and a 24V power output interface, wherein the first TYPE-C interface is respectively connected to the input ends of the first PD power decoy chip and the USB serial port protocol conversion chip, the first PD power decoy chip is used to decoy a 15V voltage, the output end of the USB serial port protocol conversion chip is connected to the communication output interface, the output end of the first PD power decoy chip is respectively connected to the power management unit and the 5V power output interface, and the output end of the power management unit is respectively connected to the 12V power output interface and the 24V power output interface.

[0006] Furthermore, the communication output interface includes a 485 communication interface, a TTL communication interface and a 232 communication interface, and the output end of the USB serial port protocol conversion chip is connected to the 485 communication interface, the TTL communication interface and the 232 communication interface respectively.

[0007] Preferably, it also includes a communication indicator light, the input end of which is respectively connected to the 485 communication interface, the TTL communication interface and the 232 communication interface.

[0008] Furthermore, it also includes a power indicator light, the input end of which is connected to the 5V power output interface, the 12V power output interface and the 24V power output interface respectively.

[0009] Furthermore, the 5V power output interface also includes a buck-boost chip, the output end of the buck-boost chip is connected to the 5V power output interface, and the input end of the buck-boost chip is connected to the first PD power decoy chip.

[0010] Furthermore, the 12V power output interface includes a step-down chip, and the 24V power output interface includes a step-up chip; the input end of the step-down chip and the input end of the step-up chip are respectively connected to the power management unit, the output end of the step-down chip is connected to the 12V power output interface, and the output end of the step-up chip is connected to the 24V power output interface.

[0011] Furthermore, the power management unit includes a MOS switch circuit.

[0012] Furthermore, it also includes a second TYPE-C interface and a second PD power decoy chip, the input end of the second PD power decoy chip is connected to the second TYPE-C interface, and the output end of the second PD power decoy chip is respectively connected to the power management unit and the 5V power output interface.

[0013] The beneficial effects of the utility model are:

[0014] 1) The utility model designs a first TYPE-C interface and carries a USB serial port protocol conversion chip on board. At the same time, through a first PD protocol deception chip, the PD protocol power supply of the first TYPE-C interface is deceptively VBUS to a fixed voltage of 15V, and then boosted to 24V output through a BOOST chip, and at the same time, the 15V is stepped down to 12V output through a BUCK chip, thereby realizing the functions of communication and 12V / 24V external power supply with only one USB cable, and at the same time, a BUCK-BOOST chip is used to convert the voltage into a stable 5V, thereby realizing the functions of both communication and power supply.

[0015] 2) The utility model designs a second TYPE-C interface and carries a second PD protocol decoy chip to connect a power bank with the PD protocol to convert the voltage into 5V / 12V / 24V, thereby solving the power supply problem of computers without a full-function USB-C or Thunderbolt interface. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of a USB protocol converter based on a full-function USB-C interface or a Thunderbolt interface according to an embodiment of the utility model;

[0017] Figure 2 This is a working principle diagram of a USB protocol converter based on a full-function USB-C interface or a Thunderbolt interface according to an embodiment of the utility model;

[0018] Figure 3 A 2.0 protocol conversion circuit of a USB protocol converter based on a full-function USB-C interface or a Thunderbolt interface in an embodiment of the utility model Figure 1 ;

[0019] Figure 4 A 2.0 protocol conversion circuit of a USB protocol converter based on a full-function USB-C interface or a Thunderbolt interface in an embodiment of the utility model Figure 2 ;

[0020] Figure 5 A PD protocol deception circuit diagram of a USB protocol converter based on a full-function USB-C interface or a Thunderbolt interface according to an embodiment of the utility model;

[0021] Figure 6 A 12V and 24V power supply and management circuit of a USB protocol converter based on a full-function USB-C interface or a Thunderbolt interface according to an embodiment of the utility model;

[0022] Figure 7 A 5V step-up and step-down circuit diagram of a USB protocol converter based on a full-function USB-C interface or a Thunderbolt interface according to an embodiment of the utility model;

[0023] In the figure, 1-first TYPE-C interface, 2-5V power output interface, 3-12V power output interface, 4-24V power output interface, 5-485 communication interface, 6-TTL communication interface, 7-232 communication interface, 8-communication indicator light, 9-power indicator light, 10-second TYPE-C interface. DETAILED DESCRIPTION

[0024] The following will be combined with the embodiments to clearly and completely describe the technical solution of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0025] For example, the structural diagram of the present utility model is as follows: Figure 1 As shown in the working principle diagram Figure 2As shown, the utility model provides a USB protocol converter based on a full-function USB-C interface or a Thunderbolt interface, including a first TYPE-C interface 1, a first PD power decoy chip, a USB serial port protocol conversion chip, a power management unit, a communication output interface, a 5V power output interface 2, a 12V power output interface 3 and a 24V power output interface 4, the first TYPE-C interface 1 is respectively connected to the input ends of the first PD power decoy chip and the USB serial port protocol conversion chip, the first PD power decoy chip is used to decoy 15V voltage, the USB serial port protocol conversion chip is used to convert USB2.0 protocol, the output end of the USB serial port protocol conversion chip is connected to the communication output interface, the output end of the first PD power decoy chip is respectively connected to the power management unit and the 5V power output interface 2, and the output end of the power management unit is respectively connected to the 12V power output interface 3 and the 24V power output interface 4.

[0026] Specifically, the communication output interface includes a 485 communication interface 5, a TTL communication interface 6 and a 232 communication interface 7, and the output end of the USB serial port protocol conversion chip is respectively connected to the 485 communication interface 5, the TTL communication interface 6 and the 232 communication interface 7. It also includes a communication indicator light 8, and the input end of the communication indicator light 8 is respectively connected to the 485 communication interface 5, the TTL communication interface 6 and the 232 communication interface 7. In order to realize the functions of both communication and power supply, the TYPE-C interface is adopted in the design, and the USB serial port protocol conversion chip CH344 is installed on the board to convert the USB2.0 protocol to TTL / 485 / 232. At the same time, the PD protocol power supply of TYPE-C is deceived by the PD protocol chip CH224K, and the VBUS of the PD protocol power supply of TYPE-C is deceived to a fixed voltage of 15V, and then the BOOST chip MT3608 is used to boost it to 24V output, and at the same time, the 15V is stepped down to 12V output through another BUCK chip SY8253ADC, so that the functions of communication and 12V / 24V external power supply can be realized with only one USB line. At the same time, the voltage is converted into a stable 5V through a BUCK-BOOST chip JW3651.

[0027] Specifically, it also includes a power indicator light 9, the input end of which is respectively connected to the 5V power output interface 2, the 12V power output interface 3 and the 24V power output interface 4. The 5V power output interface 2 also includes a buck-boost chip, the output end of which is connected to the 5V power output interface 2, and the input end of which is connected to the first PD power deception chip. The 12V power output interface 3 includes a buck chip, and the 24V power output interface 4 includes a boost chip; the input end of the buck chip and the input end of the boost chip are respectively connected to the power management unit, the output end of the buck chip is connected to the 12V power output interface 3, and the output end of the boost chip is connected to the 24V power output interface 4. The power management unit includes a MOS switch circuit. If there is a PD protocol in the circuit, the MOS switch circuit is turned on. If there is no PD protocol in the circuit, the MOS switch circuit is turned off. When the TYPE-C interface of the debugging tool is connected to the ordinary USB-A port of the computer, since the USB-A interface does not have the PD protocol and the corresponding power supply capability, it is impossible to trick out a 15V voltage. Two problems will arise. The 12V and 24V ports will output 5V, resulting in an output voltage error. In order to solve this problem, a 12V and 24V power management circuit is added when there is no PD protocol. When no PD protocol is detected, the 12V and 24V outputs are automatically cut off.

[0028] Exemplarily, a second TYPE-C interface 10 and a second PD power decoy chip can also be provided, the input end of the second PD power decoy chip is connected to the second TYPE-C interface 10, and the output end of the second PD power decoy chip is respectively connected to the power management unit and the 5V power output interface 2. Some older computers do not have a full-function USB-C interface or a Thunderbolt interface and cannot supply power to the outside through the PD protocol. To address this problem, an additional TYPE-C2 interface is designed, and another PD protocol decoy chip CH224K is mounted on the board, which is specifically used to connect to a power bank with a PD protocol to convert the voltage to 5V / 12V / 24V. This method is used to solve the power supply problem of computers without a full-function USB-C or Thunderbolt interface.

[0029] Exemplarily, the USB protocol conversion circuit of the present utility model is as follows Figure 3 and Figure 4As shown, the TXD1 data transmission pin of the USB interface chip CH344Q is connected to the T1IN input pin of the USB interface chip TP3232E, and the RXD1 data transmission pin of the USB interface chip CH344Q is connected to the T1OUT output pin of the USB interface chip TP3232E; the TXD0 data transmission pin of the USB interface chip CH344Q is connected to the A1 pin of the analog mixed signal IC isolator chip CA-IS3731HN, and the TXD1 data transmission pin of the USB interface chip CH344Q is connected to the analog mixed signal IC isolator chip CA-IS3731HN. The A3 pin of the IC isolator chip CA-IS3731HN is connected, the B1 pin of the analog mixed signal IC isolator chip CA-IS3731HN is connected to the DI pin of the interface chip TP75176E-SR, the B2 pin of the analog mixed signal IC isolator chip CA-IS3731HN is connected in parallel with the DE pin and RE pin of the interface chip TP75176E-SR, and the B3 pin of the analog mixed signal IC isolator chip CA-IS3731HN is connected to the RO pin of the interface chip TP75176E-SR.

[0030] Exemplarily, the circuit diagram of the PD protocol deception circuit of the present utility model is as follows: Figure 5As shown, after the two D- data transmission pins of the first TYPE-C interface 1 are connected in parallel, an ESD5V0B03 electrostatic diode is connected in parallel to ground, and then connected to the UD+ pin of the USB interface chip CH344Q. After the two D+ data transmission pins of the first TYPE-C interface 1 are connected in parallel, an ESD5V0B03 electrostatic diode is connected in parallel to ground, and then connected to the UD- pin of the USB interface chip CH344Q. Because the remaining connection relationship between the first TYPE-C interface 1 and other circuits is the same as the connection relationship between the second TYPE-C interface 10 and other circuits, the connection relationship between the first TYPE-C interface 1 and other circuits is described, and the connection relationship between the second TYPE-C interface 10 and other circuits is not described in detail. After the VBUS pin of the first TYPE-C interface 1 is connected in parallel with a diode PESD24VS1UL-N to ground, the VBU of the first PD protocol spoofing chip CH224K After the S pin is connected in parallel with the VDD pin, it is connected in parallel with the VBUS pin of the first TYPE-C interface 1. At the same time, a 10k / 1% resistor is connected in series to the VBUS pin of the first PD protocol decoy chip CH224K, and a 1k / 1% resistor and a 1uf / 16v capacitor are connected in parallel to the VDD pin of the first PD protocol decoy chip CH224K. Then the 1uf / 16v capacitor is grounded, and the 1k / 1% resistor is connected in parallel to the VBUS pin of the first PD protocol decoy chip CH224K. A diode PESD24VS1UL-N and a 1k / 1% resistor are connected in parallel to ground at the CC1 pin of the first TYPE-C interface 1, and then the CC1 pin of the first PD protocol decoy chip CH224K is connected. A diode PESD24VS1UL-N is connected in parallel to ground at the CC2 pin of the first PD protocol decoy chip CH224K, and then the CC2 pin of the first PD protocol decoy chip CH224K is connected.

[0031] For example, the circuit diagram of the 12V and 24V power supply and management circuit is as follows: Figure 6 As shown, the 5V buck-boost circuit is as follows Figure 7 As shown, through the first PD protocol deceiving chip CH224K, the PD protocol power supply of the first TYPE-C is deceiving VBUS to a fixed voltage of 15V, and then the boost chip MT3608 is used to boost it to 24V output, and at the same time, the 15V is bucked to 12V output through another buck chip SY8253ADC, so that only one USB cable can be used for communication and 12V / 24V external power supply. At the same time, a voltage-stabilizing buck-boost chip JW3651 is used to convert the voltage into a stable 5V. The working principle of the second PD protocol deceiving chip CH224K is the same as that of the first PD protocol deceiving chip CH224K, which will not be elaborated here.

[0032] Exemplarily, the computer has a full-function USB-C interface. The first TYPE-C interface 1 (i.e., PD protocol power supply + USB communication interface) of the utility model is connected to the Thunderbolt interface of the computer with a full-function TYPE-C interface. The communication interface and power interface of the utility model are respectively connected to industrial and agricultural sensors; the utility model is connected to the computer's full-function USB-C interface or Thunderbolt interface through a TYPE-C to TYPE-C data cable to realize the two functions of communication and 5V / 12V / 24V external output power supply.

[0033] Exemplarily, if the computer does not have a full-function USB-C interface, the second TYPE-C interface 10 (i.e., the PD power supply interface) of the utility model is powered by a power bank with PD fast charging, and the first TYPE-C interface 1 (i.e., PD protocol power supply + USB communication interface) of the utility model is connected to the USB-A interface of the computer without a full-function TYPE-C interface; the communication interface and the power interface of the utility model are respectively connected to industrial and agricultural sensors, and the utility model uses a TYPE-C to USB-A data cable to connect the USB-A port and the data exchange TYPE-C port to achieve protocol conversion and communication.

[0034] The above is only a preferred embodiment of the utility model. It should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.

Claims

1. A USB protocol converter based on a full-function USB-C interface or a Thunderbolt interface, characterized in that: The invention comprises a first TYPE-C interface (1), a first PD power decoy chip, a USB serial port protocol conversion chip, a power management unit, a communication output interface, a 5V power output interface (2), a 12V power output interface (3) and a 24V power output interface (4), wherein the first TYPE-C interface (1) is respectively connected to the input ends of the first PD power decoy chip and the USB serial port protocol conversion chip, the first PD power decoy chip is used to decoy a 15V voltage, the output end of the USB serial port protocol conversion chip is connected to the communication output interface, the output end of the first PD power decoy chip is respectively connected to the power management unit and the 5V power output interface (2), and the output end of the power management unit is respectively connected to the 12V power output interface (3) and the 24V power output interface (4).

2. A USB protocol converter based on a full-function USB-C interface or a Thunderbolt interface according to claim 1, characterized in that: The communication output interface comprises a 485 communication interface (5), a TTL communication interface (6) and a 232 communication interface (7), and the output end of the USB serial port protocol conversion chip is respectively connected to the 485 communication interface (5), the TTL communication interface (6) and the 232 communication interface (7).

3. A USB protocol converter based on a full-function USB-C interface or a Thunderbolt interface according to claim 2, characterized in that: It also includes a communication indicator light (8), the input ends of which are respectively connected to the 485 communication interface (5), the TTL communication interface (6) and the 232 communication interface (7).

4. The USB protocol converter based on a full-function USB-C interface or a Thunderbolt interface according to claim 1, characterized in that: It also comprises a power indicator light (9), the input end of which is respectively connected to the 5V power output interface (2), the 12V power output interface (3) and the 24V power output interface (4).

5. The USB protocol converter based on a full-function USB-C interface or a Thunderbolt interface according to claim 1, characterized in that: The 5V power output interface (2) further comprises a buck-boost chip, the output end of the buck-boost chip is connected to the 5V power output interface (2), and the input end of the buck-boost chip is connected to the first PD power deception chip.

6. The USB protocol converter based on a full-function USB-C interface or a Thunderbolt interface according to claim 1, characterized in that: The 12V power output interface (3) comprises a step-down chip, and the 24V power output interface (4) comprises a step-up chip; an input end of the step-down chip and an input end of the step-up chip are respectively connected to the power management unit, an output end of the step-down chip is connected to the 12V power output interface (3), and an output end of the step-up chip is connected to the 24V power output interface (4).

7. The USB protocol converter based on a full-function USB-C interface or a Thunderbolt interface according to claim 1, characterized in that: The power management unit includes a MOS switch circuit.

8. The USB protocol converter based on a full-function USB-C interface or a Thunderbolt interface according to claim 1, characterized in that: It also includes a second TYPE-C interface (10) and a second PD power deception chip, wherein the input end of the second PD power deception chip is connected to the second TYPE-C interface (10), and the output end of the second PD power deception chip is respectively connected to the power management unit and the 5V power output interface.

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