Voltage adjustment circuit, switching device and communication system
By using the transformer and control circuits in the voltage regulation circuit, the communication failure and current backflow problems caused by voltage mismatch between different devices were solved, and normal communication between devices was realized.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 安徽曦合微电子有限公司
- Filing Date
- 2025-09-08
- Publication Date
- 2026-08-04
AI Technical Summary
Communication failures or current backflow can occur between different devices due to voltage mismatch at their communication interfaces.
A voltage adjustment circuit is adopted, including a transformer circuit, a control circuit, and a transceiver circuit. The transformer circuit converts the first voltage into a second voltage, and the control circuit and transceiver circuit convert communication signals and protocols to match the communication voltage of different devices.
This effectively avoids communication failures and current backflow caused by voltage mismatch, enabling normal communication between different devices.
Smart Images
Figure CN224595047U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of communication technology, specifically to voltage regulation circuits, switching devices, and communication systems. Background Technology
[0002] When transmitting signals between devices, different devices may use different voltages for communication via their communication interfaces. Voltage mismatch can lead to communication failures. For example, when transmitting signals between a computer and a mobile phone, the computer's communication interface uses 5V, while the mobile phone's uses 3.3V. When the mobile phone acts as the master and the computer as the slave, the high-level signal sent by the mobile phone to the computer may not reach the computer's corresponding high-level threshold (e.g., 3.5V). This can cause the mobile phone's high-level (3.3V) communication signal to be misinterpreted as a low-level signal, resulting in communication failure. In severe cases, this can even lead to reverse current flow, affecting the safety of device operation. Utility Model Content
[0003] In view of the above problems, this application provides a voltage regulation circuit, an adapter, and a communication system.
[0004] In a first aspect, embodiments of this application provide a voltage adjustment circuit, the circuit comprising:
[0005] An input port is used to connect to a first device and receive a first voltage and a first communication signal transmitted by the first device.
[0006] A transformer circuit having a first input terminal and a first output terminal; the first input terminal is electrically connected to the input port, and the transformer circuit is used to convert the first voltage into a second voltage;
[0007] A control circuit having a first communication terminal and a second communication terminal; the first communication terminal of the control circuit is electrically connected to the input port, and the control circuit is used to convert the first communication signal into a second communication signal;
[0008] A transceiver circuit is used to connect to a second device. The transceiver circuit has a third communication terminal and a fourth communication terminal. The third communication terminal is electrically connected to the control circuit and is used to receive the second communication signal. The fourth communication terminal includes a first power supply terminal and a first transceiver terminal. The first power supply terminal is electrically connected to the first output terminal. The transceiver circuit is used to adjust the voltage of the first transceiver terminal to the second voltage based on the second voltage of the first power supply terminal. The first transceiver terminal is used to output the second communication signal of the second voltage to the second device.
[0009] In one embodiment, the third communication terminal of the transceiver circuit includes a second power supply terminal and a second transceiver terminal;
[0010] The second power supply terminal and the second transceiver terminal are respectively electrically connected to the control circuit, and the second power supply terminal is used to receive the third voltage;
[0011] The transceiver circuit is further configured to adjust the voltage of the second transceiver terminal to the third voltage based on the third voltage of the second power supply terminal, and the second transceiver terminal is configured to receive the second communication signal.
[0012] In one embodiment, the transformer circuit includes a step-down chip and a voltage divider circuit;
[0013] The input terminal of the step-down chip is electrically connected to the input port, and the output terminal of the step-down chip is electrically connected to the first terminal and the first power supply terminal of the voltage divider circuit, respectively.
[0014] The step-down chip also has a feedback terminal, which is electrically connected to the second terminal of the voltage divider circuit. The step-down chip is used to detect the detection voltage at the second terminal of the voltage divider circuit and output the second voltage based on the detection voltage.
[0015] In one embodiment, the voltage divider circuit includes a first resistor and a variable resistor;
[0016] The first end of the variable resistor is electrically connected to the output end of the step-down chip, the second end of the variable resistor is electrically connected to the first end of the first resistor and the feedback end of the step-down chip respectively, and the second end of the first resistor is grounded.
[0017] In one embodiment, the variable resistor is a sliding rheostat.
[0018] In one embodiment, the first transceiver is further configured to receive a third communication signal output by the second device, and the transceiver circuit is further configured to transmit the third communication signal to the control circuit;
[0019] The control circuit is also used to convert the third communication signal into a fourth communication signal and output it.
[0020] In one embodiment, the control circuit is used to generate the second communication signal after performing protocol conversion on the first communication signal.
[0021] In one embodiment, the control circuit is used to generate the fourth communication signal after performing protocol conversion on the third communication signal.
[0022] Secondly, this application also proposes an adapter device, including the voltage adjustment circuit described above.
[0023] Thirdly, this application also proposes a communication system, including a first device, a second device, and the aforementioned switching device;
[0024] The adapter is connected to the first device and the second device respectively. The adapter is used to convert the first communication signal of the first voltage output by the first device into the second communication signal of the second voltage and output it to the second device.
[0025] This application outputs a corresponding second voltage through a transformer circuit, and adjusts the voltage of the second communication signal to the second voltage based on the second voltage output by the transceiver circuit, so as to match different communication voltages and avoid communication failure or current backflow due to different communication voltages between different devices. Attached Figure Description
[0026] Figure 1 This is a schematic diagram of the voltage adjustment circuit provided in the embodiment of this application.
[0027] Figure 2 This is a schematic diagram of the transceiver circuit provided in the embodiments of this application.
[0028] Figure 3 This is a schematic diagram of the transformer circuit provided in the embodiment of this application.
[0029] Figure 4 This is a schematic diagram of the control circuit provided in the embodiment of this application.
[0030] Figure 5 This is a schematic diagram of the voltage adjustment circuit provided in the embodiment of this application.
[0031] Figure 6 This is a schematic diagram of the input port provided in an embodiment of this application.
[0032] Figure 7 This is a partial structural schematic diagram of the voltage adjustment circuit provided in the embodiments of this application.
[0033] Explanation of main component symbols
[0034] Voltage regulation circuit 100
[0035] Input port 110
[0036] Transformer circuit 120
[0037] Control circuit 130
[0038] Transceiver circuit 140
[0039] Step-down chip 121
[0040] Voltage divider circuit 122
[0041] First resistor R1
[0042] Variable resistor R2
[0043] First equipment 200
[0044] Second equipment 300 Detailed Implementation
[0045] 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, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.
[0046] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0047] For ease of description of the first and second directions in the embodiments of this application, the first direction is the up-down direction in the figures, the second direction is the front-back direction in the figures, and the third direction is the left-right direction in the figures. The x-axis arrow direction is referred to as the "up" direction, the y-axis arrow direction as the "back" direction, and the z-axis arrow direction as the "right" direction, but these are not the sole limitations in the actual application of this application.
[0048] Figure 1 This is a schematic diagram of the voltage adjustment circuit 100 provided in an embodiment of this application. Figure 1As shown, this application provides a voltage adjustment circuit 100, including an input port 110, a transformer circuit 120, a control circuit 130, and a transceiver circuit 140. The input port 110 is used to receive a first voltage and a first communication signal. The transformer circuit 120 has a first input terminal and a first output terminal; the first input terminal is electrically connected to the input port 110, and the transformer circuit 120 is used to convert the first voltage into a second voltage. The control circuit 130 has a first communication terminal and a second communication terminal; the first communication terminal of the control circuit 130 is electrically connected to the input port 110, and the control circuit 130 is used to convert the first communication signal into a second communication signal. The transceiver circuit 140 has a third communication terminal and a fourth communication terminal; the third communication terminal is electrically connected to the control circuit 130 and is used to receive / output the second communication signal; the fourth communication terminal includes a first power supply terminal and a first transceiver terminal, the first power supply terminal being electrically connected to the first output terminal; the transceiver circuit 140 is used to adjust the voltage of the first transceiver terminal to the second voltage based on the second voltage of the first power supply terminal, and the first transceiver terminal is used to output / receive the second communication signal. The magnitude of the second voltage can be adjusted according to actual needs, for example, it can be 1.2V~5V. The input port 110 can be a USB interface, a Lightning interface, etc.
[0049] Reference Figure 2 In this embodiment, the voltage adjustment circuit 100 can be applied to an independent adapter device, which is connected to the first device 200 and the second device 300 respectively, for voltage conversion between the two devices. For example, the input port 110 of the voltage adjustment circuit 100 is connected to the first device 200. The transformer circuit 120 receives the first voltage through the input port 110 and converts the first voltage into a second voltage VIO, which is then transmitted to the first power supply terminal VCCA of the transceiver circuit 140. The control circuit 130 receives the first communication signal through the input port 110, converts the first communication signal into a second communication signal that the second device 300 can receive based on the communication protocol, and outputs it to the first transceiver terminals A1-A4 of the transceiver circuit 140. The transceiver circuit 140 adjusts the voltage of the first transceiver terminals A1-A4 to the second voltage based on the second voltage of the first power supply terminal VCCA, so that the first transceiver terminals A1-A4 output a second communication signal with the second voltage to communicate with the second device 300, thereby avoiding communication failure or current backflow due to different communication voltages.
[0050] The input port 110 may be a mechanical connector for inserting a USB head to enable the control circuit 130 to communicate with the first device 200 and / or the second device 300.
[0051] In one embodiment, the control circuit 130 is used to generate the second communication signal after performing protocol conversion on the first communication signal. The control circuit 130 is also used to generate the fourth communication signal after performing protocol conversion on the third communication signal.
[0052] Reference Figure 2 In one embodiment, the third communication terminal of the transceiver circuit 140 includes a second power supply terminal VCCB and second transceiver terminals B1-B4. The second power supply terminal VCCB and the second transceiver terminals B1-B4 are electrically connected to the control circuit 130. The second power supply terminal VCCB is used to receive a third voltage, and the second transceiver terminals B1-B4 are used to receive / output the second communication signal. The third voltage is the same as the voltage of the second communication signal received and the fourth communication signal output by the control circuit 130. After master-slave switching, the transceiver circuit 140 is also used to adjust the voltage output by the second transceiver terminals to the third voltage based on the third voltage of the second power supply terminal VCCB, thereby realizing communication after the master and slave devices are interchanged.
[0053] In this embodiment, the control circuit 130 outputs a third voltage to the second power supply terminal VCCB, so that the transceiver circuit 140 adjusts the voltage output from the second transceiver terminal to the third voltage, thereby outputting a fourth communication signal with the third voltage for the control circuit 130 to receive.
[0054] Reference Figure 3 In one embodiment, the transformer circuit 120 includes a step-down chip 121 and a voltage divider circuit 122. The input terminal of the step-down chip 121 is electrically connected to the input port 110 to obtain the voltage VBUS provided by the first device 200. The output terminal VOUT of the step-down chip 121 is electrically connected to the first terminal and the first power supply terminal of the voltage divider circuit 122, respectively. The step-down chip 121 also has a feedback terminal ADJ, which is electrically connected to the second terminal of the voltage divider circuit 122. The feedback terminal ADJ of the step-down chip 121 is used to detect the detection voltage at the second terminal of the voltage divider circuit 122, and outputs the second voltage through the output terminal VOUT based on the detection voltage.
[0055] In one embodiment, the voltage divider circuit 122 includes a first resistor R1 and a variable resistor R2. The first end of the variable resistor R2 is electrically connected to the output terminal VOUT of the buck chip 121, and the second end of the variable resistor R2 is electrically connected to the first end of the first resistor R1 and the feedback terminal ADJ of the buck chip 121, respectively. The second end of the first resistor R1 is grounded.
[0056] In one embodiment, the variable resistor R2 is a sliding rheostat.
[0057] In one embodiment, the step-down chip 121 can be implemented using an MCP1727 chip.
[0058] In one embodiment, the transceiver circuit 140 can be implemented using a TXS0104EPW chip.
[0059] Reference Figure 4 In one embodiment, the control circuit 130 can be implemented using an LPC1343FBD48 chip.
[0060] The following will combine Figures 1-7 Explaining the principles of this application:
[0061] In one embodiment, the transformer circuit 120 includes an MCP1727 chip, a first resistor R1, and a sliding rheostat. The control circuit 130 includes an LPC1343FBD48 chip, and the transceiver circuit 140 includes a TXS0104EPW chip. After the voltage adjustment circuit 100 is connected to a computer, mobile phone, or other device through the input port 110, the VCCA pin of the MCP1727 chip receives the first voltage VBUS. The MCP1727 chip steps down the first voltage and outputs a second voltage VIO. It is understood that the second voltage VIO output by the MCP1727 chip is affected by the voltage at the feedback terminal ADJ. Therefore, adjusting the resistance value of the sliding rheostat can adjust the voltage at the ADJ pin, thereby adjusting the magnitude of the output second voltage VIO. Thus, by adjusting the resistance value of the sliding rheostat according to the actual required communication voltage, a corresponding second voltage VIO can be output to the VCCA pin of the TXS0104EPW chip.
[0062] After receiving the first communication signal, the TXS0104EPW chip converts it into a second communication signal according to the corresponding communication protocol and transmits it to pins B1-B4 of the TXS0104EPW chip. Based on the second voltage VIO of its pin 1, the TXS0104EPW chip adjusts the voltage of its pins A1-A4 to be the same as the second voltage VIO, so that its pins A1-A4 can output a second communication signal with the second voltage, which can be received by subsequent circuits. The communication protocol includes, but is not limited to, Serial Peripheral Interface (SPI), Inter-Integrated Circuit (IIC), Serial Wire Debug (SWD), and Universal Asynchronous Receiver / Transmitter (UART). Figure 4The LPC1343FBD48 chip shown in the diagram outputs SPI signals through pins 27, 28, 29, and 30, but the LPC1343FBD48 chip may also include other pins for outputting other protocol models.
[0063] In addition, the TXS0104EPW chip can also transmit data bidirectionally. The LPC1343FBD48 chip can supply a third voltage of 3.3V to the VCCB pin of the TXS0104EPW chip, or the VCCB pin of the TXS0104EPW chip can be powered by a third voltage from an independent power supply. The TXS0104EPW chip can convert the second communication signal with a second voltage received by its pins A1-A4 into a second communication signal with a third voltage and output it to the LPC1343FBD48 chip so that the LPC1343FBD48 chip can receive it.
[0064] In the LPC1343FBD48 chip, DM and DP represent the data signals transmitted by the first device, and USB-COMN represents the feedback signal. A high level signal sent by the first device through the input port turns on the LED and a low level turns off the LED, thus indicating the working status of the LPC1343FBD48 chip.
[0065] Figure 7 In the LPC1343FBD48 chip, the ISP pin is grounded. When connected to a computer, the LPC can be recognized as a USB flash drive, allowing for direct program burning. The reset button SW1 allows the LPC1343FBD48 chip to re-execute software steps; for example, after burning a new program, pressing the reset button re-executes the process.
[0066] Thus, by adjusting the second voltage output of the MCP1727 chip using a sliding rheostat, the voltage of the second signal output by the TXS0104EPW can be adjusted to match the communication voltage of different devices.
[0067] in, Figure 4 and Figure 6 P1 in the diagram is a mechanical interface used to insert connectors for connecting cables, such as one connector of a USB data cable, and the other connector of the USB data cable is inserted into the first device.
[0068] This application also proposes an adapter, including the voltage adjustment circuit 100 in any of the above embodiments.
[0069] This application also proposes a communication system, including a first device 200, a second device 300, and the aforementioned adapter; the adapter is connected to the first device 200 and the second device 300 respectively, and the adapter is used to convert a first communication signal with a first voltage output by the first device 200 into a second communication signal with a second voltage, and output it to the second device 300.
[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.
Claims
1. A voltage adjustment circuit, characterized by, The circuit includes: An input port is used to connect to a first device and receive a first voltage and a first communication signal transmitted by the first device. A transformer circuit having a first input terminal and a first output terminal; the first input terminal is electrically connected to the input port, and the transformer circuit is used to convert the first voltage into a second voltage; A control circuit having a first communication terminal and a second communication terminal; the first communication terminal of the control circuit is electrically connected to the input port, and the control circuit is used to convert the first communication signal into a second communication signal; A transceiver circuit is used to connect to a second device. The transceiver circuit has a third communication terminal and a fourth communication terminal. The third communication terminal is electrically connected to the control circuit and is used to receive the second communication signal. The fourth communication terminal includes a first power supply terminal and a first transceiver terminal. The first power supply terminal is electrically connected to the first output terminal. The transceiver circuit is used to adjust the voltage of the first transceiver terminal to the second voltage based on the second voltage of the first power supply terminal. The first transceiver terminal is used to output the second communication signal of the second voltage to the second device.
2. The voltage adjustment circuit of claim 1, wherein, The third communication terminal of the transceiver circuit includes a second power supply terminal and a second transceiver terminal; The second power supply terminal and the second transceiver terminal are respectively electrically connected to the control circuit, and the second power supply terminal is used to receive the third voltage; The transceiver circuit is further configured to adjust the voltage of the second transceiver terminal to the third voltage based on the third voltage of the second power supply terminal, and the second transceiver terminal is configured to receive the second communication signal.
3. The voltage adjustment circuit according to claim 1, characterized in that, The transformer circuit includes a step-down chip and a voltage divider circuit; The input terminal of the step-down chip is electrically connected to the input port, and the output terminal of the step-down chip is electrically connected to the first terminal and the first power supply terminal of the voltage divider circuit, respectively. The step-down chip also has a feedback terminal, which is electrically connected to the second terminal of the voltage divider circuit. The step-down chip is used to detect the detection voltage at the second terminal of the voltage divider circuit and output the second voltage based on the detection voltage.
4. The voltage adjustment circuit according to claim 3, characterized in that, The voltage divider circuit includes a first resistor and a variable resistor; The first end of the variable resistor is electrically connected to the output end of the step-down chip, the second end of the variable resistor is electrically connected to the first end of the first resistor and the feedback end of the step-down chip respectively, and the second end of the first resistor is grounded.
5. The voltage regulation circuit according to claim 4, characterized in that, The variable resistor is a sliding rheostat.
6. The voltage regulation circuit according to claim 1, characterized in that, The first transceiver is also used to receive a third communication signal output by the second device, and the transceiver circuit is also used to transmit the third communication signal to the control circuit. The control circuit is also used to convert the third communication signal into a fourth communication signal and output it.
7. The voltage regulation circuit according to claim 1, characterized in that, The control circuit is used to generate the second communication signal after performing protocol conversion on the first communication signal.
8. The voltage adjustment circuit according to claim 6, characterized in that, The control circuit is used to generate the fourth communication signal after performing protocol conversion on the third communication signal.
9. A switching device, characterized in that, Includes the voltage regulation circuit as described in any one of claims 1 to 8.
10. A communication system, characterized in that, Includes the first device, the second device, and the switching device as described in claim 9; The adapter is connected to the first device and the second device respectively. The adapter is used to convert the first communication signal of the first voltage output by the first device into the second communication signal of the second voltage and output it to the second device.