A charging circuit and chip supporting Ethernet connection

Abstract

The application relates to a charging circuit and chip supporting an Ethernet connection, belonging to the technical field of electronic circuits, which comprises a transmission interface used for connecting a charging end of a terminal device; a voltage conversion module used for converting an input voltage into a direct-current voltage and supplying power to the transmission interface; a charging control module used for judging whether the transmission interface is connected with the terminal device, and generating a voltage control signal if yes; an output adjustment module used for responding to the voltage control signal and adjusting the direct-current voltage of the voltage conversion module to a charging voltage required by the terminal device; a network cable interface used for connecting an Ethernet; and a data control module used for judging whether the network cable interface is connected with the Ethernet, and transmitting network data to the transmission interface if yes. The application has the effect that the terminal device can simultaneously perform network data transmission and charging through one charging interface.

Description

Technical Field

[0001] This invention relates to the field of electronic circuit technology, and in particular to a charging circuit and chip that supports Ethernet connectivity. Background Technology

[0002] Ethernet is a computer local area network (LAN) technology. Ethernet cables are used to connect computers, printers, routers, switches, and other devices on a LAN. The charging circuit refers to a circuit based on the PD fast charging protocol, a widely applicable fast charging standard.

[0003] Currently, when terminal devices use PD charging circuits for charging, they typically need to be connected to the terminal device's transmission interface; when terminal devices connect to Ethernet for data transmission, they typically need to be connected to the terminal device's network cable interface. For terminal devices with only one transmission interface, an additional adapter connecting the transmission interface and the Ethernet cable interface is required to enable Ethernet connectivity.

[0004] Regarding the aforementioned technologies, the inventors discovered that terminal devices with only one transmission interface cannot simultaneously handle charging and Ethernet connectivity, making them inconvenient to use. Summary of the Invention

[0005] To facilitate simultaneous network data transmission and charging of terminal devices, this application provides a charging circuit and chip that supports Ethernet connectivity.

[0006] Firstly, this application provides a charging circuit that supports Ethernet connectivity, employing the following technical solution:

[0007] A charging circuit supporting Ethernet connectivity includes:

[0008] A transmission interface for connecting the charging port of a terminal device;

[0009] The voltage conversion module is used to convert the input voltage into DC voltage and supply power to the transmission interface;

[0010] The charging control module is used to determine whether a terminal device is connected to the transmission interface; if so, it generates a voltage control signal.

[0011] The output regulation module is used to respond to the voltage control signal and regulate the DC voltage of the voltage conversion module to the charging voltage required by the terminal device;

[0012] A network cable interface is used to connect to an Ethernet network; and,

[0013] The data control module is used to determine whether the network cable interface is connected to Ethernet. If so, it transmits network data to the transmission interface.

[0014] By employing the above technical solution, a voltage conversion module converts mains power or DC power into DC power. When the charging control module detects a terminal device connected to the transmission interface, it generates a voltage control signal and sends it to the output regulation module. The output regulation module then adjusts the voltage output of the voltage conversion module according to the voltage control signal, adjusting the output voltage to match the charging voltage of the terminal device for charging. Simultaneously, the data control module detects whether the network cable interface is connected to Ethernet. When the network cable interface is connected to Ethernet, the data control module transmits network data to the transmission interface, thus achieving the effect of receiving network data and accessing the internet simultaneously through a single transmission interface while charging.

[0015] Optionally, the voltage conversion module includes a first input terminal, a second input terminal, a positive output terminal, and a negative output terminal;

[0016] The charging control module includes a positive voltage detection terminal, a negative voltage detection terminal, a device detection terminal, and a control signal output terminal. The device detection terminal is connected to the transmission interface, the positive voltage detection terminal is connected to the positive output terminal of the voltage conversion module, and the negative voltage detection terminal is connected to the negative output terminal of the voltage conversion module.

[0017] The output adjustment module includes a reference input terminal, an adjustment input terminal, an adjustment output terminal, and a ground terminal. The adjustment input terminal is connected to the control signal output terminal of the fast charging control circuit, the adjustment output terminal is connected to the first input terminal and the second input terminal of the voltage conversion module, and the reference input terminal is connected to the positive output terminal of the voltage conversion module.

[0018] The data control module includes a data detection end and a data transmission end. The data detection end is connected to the network cable interface, and the data transmission end is connected to the transmission interface.

[0019] By adopting the above technical solution, the first and second input terminals of the voltage converter are used to connect to mains power or DC power, and the positive and negative output terminals output voltage. When the device detection terminal of the charging control module detects that a terminal device is connected to the transmission interface, the positive and negative voltage detection terminals detect the voltage output by the voltage conversion module, and output a voltage control signal from the control signal output terminal based on the detected voltage. The adjustment input terminal of the output adjustment module receives the voltage control signal, and adjusts the voltage of the voltage conversion module from the adjustment output terminal based on the voltage control signal and the voltage signal received from the reference input terminal. At the same time, the data detection terminal of the data control module detects whether the network cable interface is connected to Ethernet. If it is connected, the data transmission terminal transmits network data to the transmission interface.

[0020] Optionally, the output adjustment module includes an adjustment chip U2 and an isolation unit;

[0021] The isolation unit is used to respond to the voltage control signal output by the charging control module and the voltage signal output by the positive output terminal of the voltage conversion module, and to output a voltage adjustment signal.

[0022] The regulating chip U2 is used to respond to the voltage regulation signal to control the voltage output of the voltage conversion module. The regulating signal receiving end is connected to the isolation unit, and the regulating signal sending end is connected to the regulating output end of the output regulating module.

[0023] By adopting the above technical solution, the isolation unit responds to the voltage control signal and the voltage signal output from the positive output terminal of the voltage conversion module, and outputs a voltage adjustment signal. The voltage output by the voltage conversion module is adjusted according to the voltage adjustment signal.

[0024] Optionally, the isolation unit includes an optocoupler OC1, a first voltage divider resistor R1, and a second voltage divider resistor R2;

[0025] The optocoupler OC1 has its anode connected to one end of the first voltage divider resistor R1, its cathode connected to one end of the second voltage divider resistor R2 and the adjustment input terminal of the output adjustment module, its collector connected to the adjustment signal receiving terminal of the adjustment chip U2, and its emitter grounded.

[0026] The other end of the first voltage divider resistor R1 and the other end of the second voltage divider resistor R2 are both connected to the reference input terminal of the output adjustment module.

[0027] By adopting the above technical solution, when the cathode of optocoupler OC1 receives a low level, the anode of optocoupler OC1 is at a high level, and the light-emitting diode LED1 of optocoupler OC1 is turned on, causing the NPN transistor of optocoupler OC1 to be grounded. At this time, the level of the adjustment signal receiving end of the adjustment chip is pulled low, that is, a low-level signal is given to the adjustment chip U2. Conversely, when the cathode of optocoupler OC1 receives a high level, optocoupler OC1 is not turned on, and a high-level signal is given to the adjustment chip U2.

[0028] Optionally, the data control module includes a network transformer U4 and a data conversion chip U5. The input terminal of the network transformer U4 is connected to the data detection terminal of the data control module, and the output terminal is connected to the data receiving terminal of the data conversion chip U5. The data output terminal of the data conversion chip U5 is connected to the data transmission terminal of the data control module.

[0029] By adopting the above technical solution, the network transformer U4 is used to detect the input network signal and transmit the network signal to the data conversion chip U5, which then sends the network signal to the transmission interface.

[0030] Optionally, a protection circuit may also be included, which is used to control the on / off state of the positive output terminal of the voltage conversion module and the transmission interface.

[0031] By adopting the above technical solution, when the transmission interface is not connected to the terminal device, it is easy to disconnect the positive output terminal of the voltage conversion module from the transmission interface, so as to disconnect the power supply to the transmission interface when there is no terminal device, thereby improving safety.

[0032] Optionally, the charging control module further includes a switch signal output terminal, and the protection circuit includes an NMOS transistor Q1. The drain of the NMOS transistor Q1 is connected to the positive output terminal of the voltage conversion module, the source is connected to the transmission interface, and the gate is connected to the switch signal output terminal of the charging control module.

[0033] By adopting the above technical solution, when a terminal device is connected to the transmission interface, the switching signal output terminal of the charging control module outputs a high level. After the gate of the NMOS transistor Q1 receives the high level signal, it turns on, making the positive output terminal of the voltage conversion module and the transmission interface connected. At this time, the voltage conversion unit supplies power to the terminal device through the transmission interface.

[0034] Optionally, the transmission interface includes a power supply output terminal, and the data conversion chip U5 also includes a backup power supply terminal, with the power supply output terminal connected to the backup power supply terminal.

[0035] By adopting the above technical solution, when the data conversion chip U5 is not connected to an external power source, the power of the terminal device is transmitted to the data conversion chip U5 through the transmission interface, that is, the terminal device supplies power to the data conversion chip U5 to maintain the normal transmission of network data.

[0036] Optionally, it also includes a light-emitting diode LED1 and a third resistor R3. The cathode of the light-emitting diode LED1 is connected to the indicator signal output terminal of the charging control module, and the anode is connected to one end of the third resistor R3. The other end of the third resistor R3 is connected to the source of the NMOS transistor Q1.

[0037] By adopting the above technical solution, when the NMOS transistor Q1 is turned on, the voltage flows through the third resistor R3 to the light-emitting diode LED1, causing the light-emitting diode LED1 to conduct and emit light, so as to indicate the charging status of the terminal device.

[0038] Secondly, this application provides a fast charging chip that supports Ethernet connectivity, employing the following technical solution:

[0039] A fast charging chip supporting Ethernet connectivity includes a charging circuit supporting Ethernet connectivity as described in any of the preceding claims. Attached Figure Description

[0040] Figure 1 This is a structural block diagram of one embodiment of this application.

[0041] Figure 2 This is a circuit connection diagram of one embodiment of the present application for illustrating the voltage conversion module and the charging control module.

[0042] Figure 3 This is a circuit connection structure diagram of one embodiment of the present application used to illustrate the rectifier filter sub-circuit.

[0043] Figure 4 This is a circuit connection structure diagram of one embodiment of the present application used to illustrate the transmission interface.

[0044] Figure 5 This is a circuit connection diagram of one embodiment of the present application for illustrating the network cable interface and the data control module.

[0045] Explanation of reference numerals in the attached diagram: 1. Transmission interface; 2. Voltage conversion module; 21. Rectifier filter circuit; 3. Charging control module; 4. Output adjustment module; 5. Network cable interface; 6. Data control module. Detailed Implementation

[0046] To make the purpose, technical solution, and advantages of this application clearer, the following description is provided in conjunction with the appendix. Figure 1-5 The present application will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the application.

[0047] This application discloses a charging circuit that supports Ethernet connectivity. (Refer to...) Figure 1 A charging circuit supporting Ethernet connectivity includes:

[0048] Transmission interface 1 is used to connect to the charging port of the terminal device;

[0049] Among them, transmission interface 1 is a USB male connector, and the charging end of the terminal device is a USB female connector. Transmission interface 1 and the charging end of the terminal device are connected by plugging in.

[0050] Voltage conversion module 2 is used to convert the input voltage into DC voltage and supply power to transmission interface 1;

[0051] It should be understood that voltage conversion module 2 can be either an AC-DC conversion circuit or a DC-DC conversion circuit. That is, when voltage conversion module 2 is connected to AC power, the input voltage is AC, and voltage conversion module 2 converts AC power to DC power to supply power to the terminal device; when voltage conversion module 2 is connected to a DC power source such as a power bank, the input voltage is DC.

[0052] It should also be understood that the charging circuit includes a power supply access interface, which can be a USB interface that is connected to the USB connector via a wire.

[0053] The charging control module 3 is used to determine whether a terminal device is connected to the transmission interface 1. If so, it generates a voltage control signal.

[0054] Output regulation module 4 is used to respond to voltage control signals and regulate the DC voltage of voltage conversion module 2 to the charging voltage required by the terminal device;

[0055] Network cable interface 5 is used for Ethernet connection; and,

[0056] The data control module 6 is used to determine whether the network cable interface 5 is connected to Ethernet. If so, it transmits network data to the transmission interface 1.

[0057] In the above embodiment, the voltage conversion module 2 converts mains power or DC power into DC power. When the charging control module 3 detects that a terminal device is connected to the transmission interface 1, the charging control module 3 generates a voltage control signal and sends it to the output adjustment module 4. The output adjustment module 4 then adjusts the voltage output by the voltage conversion module 2 according to the voltage control signal, adjusting the output voltage of the voltage conversion module 2 to the charging voltage of the terminal device to charge it. Simultaneously, the data control module 6 detects whether the network cable interface 5 is connected to Ethernet. When the network cable interface 5 is connected to Ethernet, the data control module 6 transmits network data to the transmission interface 1, thus achieving the effect of receiving network data and accessing the internet while charging using a single transmission interface 1.

[0058] Referring to 1, as a further embodiment of the charging circuit of this application, the voltage conversion module 2 includes a first input terminal, a second input terminal, a positive output terminal, and a negative output terminal;

[0059] The charging control module 3 includes a positive voltage detection terminal, a negative voltage detection terminal, a device detection terminal, and a control signal output terminal. The device detection terminal is connected to the transmission interface 1, the positive voltage detection terminal is connected to the positive output terminal of the voltage conversion module 2, and the negative voltage detection terminal is connected to the negative output terminal of the voltage conversion module 2.

[0060] The output adjustment module 4 includes a reference input terminal, an adjustment input terminal, an adjustment output terminal, and a ground terminal. The adjustment input terminal is connected to the control signal output terminal of the fast charging control circuit, the adjustment output terminal is connected to the first input terminal and the second input terminal of the voltage conversion module 2, and the reference input terminal is connected to the positive output terminal of the voltage conversion module 2.

[0061] The data control module 6 includes a data detection end and a data transmission end. The data detection end is connected to the network cable interface 5, and the data transmission end is connected to the transmission interface 1.

[0062] In the above embodiment, the first and second input terminals of the voltage conversion module are used to connect to mains power or DC power, and output voltage through the positive and negative output terminals. When the device detection terminal of the charging control module 3 detects that a terminal device is connected to the transmission interface 1, the positive and negative voltage detection terminals detect the voltage output by the voltage conversion module 2, and output a voltage control signal through the control signal output terminal based on the detected voltage. The adjustment input terminal of the output adjustment module 4 receives the voltage control signal, and adjusts the voltage of the voltage conversion module 2 through the adjustment output terminal based on the voltage control signal and the voltage signal received by the reference input terminal. At the same time, the data detection terminal of the data control module 6 detects whether the network cable interface 5 is connected to Ethernet. If it is connected, the data transmission terminal transmits network data to the transmission interface 1.

[0063] Reference Figure 2 As one implementation of the voltage conversion module 2, the voltage conversion module 2 includes a transformer T1 and a rectifier filter sub-circuit 21; the input terminal of the rectifier filter sub-circuit 21 is connected to the mains power or DC power, and the output terminal is connected to the first terminal of the primary side of the transformer T1; the second terminal of the primary side of the transformer T1 is connected to the output adjustment module 4, the first terminal of the secondary side is connected to the positive output terminal, and the second terminal of the secondary side is connected to the negative output terminal.

[0064] Reference Figure 3 As one embodiment of the rectifier filter sub-circuit 21, the rectifier filter sub-circuit 21 includes a first common-mode inductor LF1, a second common-mode inductor LF2 and a bridge rectifier diode BD1 connected in sequence. Four bridge rectifier diodes BD1 are provided. The cathodes and anodes of the four bridge rectifier diodes BD1 are connected in sequence. The output terminals of the four bridge rectifier diodes BD1 are connected to the first terminal of the primary side of the transformer T1.

[0065] Reference Figure 2 As one implementation of the output adjustment module 4, the output adjustment module 4 includes an adjustment chip U2 and an isolation unit;

[0066] An isolation unit is used to respond to the voltage control signal output by the charging control module 3 and the voltage signal output by the positive output terminal of the voltage conversion module 2, and to output a voltage adjustment signal.

[0067] The regulating chip U2 is used to respond to the voltage regulation signal to control the voltage output of the voltage conversion module 2. The regulating signal receiving end is connected to the isolation unit, and the regulating signal sending end is connected to the regulating output end of the output regulating module 4.

[0068] Specifically, the regulating output terminal of the output regulating module 4 is connected to the second terminal of the primary side of the transformer T1.

[0069] It should be noted that when the regulating signal receiving end of the regulating chip U2 receives a low-level signal, the regulating chip U2 will reduce the duty cycle of the output of the regulating signal transmitting end, thereby reducing the output voltage of the voltage conversion module 2; conversely, when the regulating signal receiving end of the regulating chip U2 receives a high-level signal, the regulating chip U2 will increase the duty cycle of the output of the regulating signal transmitting end, thereby increasing the output voltage of the voltage conversion module 2; thus, the regulating chip U2 realizes the regulation of the output voltage of the voltage conversion module 2, making it easy to adjust the output voltage of the voltage conversion module 2 to the power supply voltage of the terminal device.

[0070] Reference Figure 2 As one implementation of the isolation unit, the isolation unit includes an optocoupler OC1, a first voltage divider resistor R1, and a second voltage divider resistor R2.

[0071] The optocoupler OC1 has its anode connected to one end of the first voltage divider resistor R1, its cathode connected to one end of the second voltage divider resistor R2 and the adjustment input terminal of the output adjustment module 4, its collector connected to the adjustment signal receiving terminal of the adjustment chip U2, and its emitter grounded.

[0072] The other ends of the first voltage divider resistor R1 and the second voltage divider resistor R2 are both connected to the reference input terminal of the output adjustment module 4.

[0073] It should be understood that the other ends of the first voltage divider resistor R1 and the second voltage divider resistor R2 are both connected to the positive output terminal of the voltage conversion module 2 to sample the output voltage of the voltage conversion module 2. That is, the anode voltage of the optocoupler OC1 is equal to the voltage division of the output voltage of the voltage conversion module 2 across the first voltage divider resistor R1, and the cathode voltage is equal to the sum of the voltage division of the output voltage of the voltage conversion module 2 across the second voltage divider resistor R2 and the output signal of the adjustment output terminal of the adjustment circuit. Since the optocoupler OC1 conducts when the anode voltage is greater than the cathode voltage, when the adjustment input terminal of the output adjustment module 4 is low, the light-emitting diode LED1 of the optocoupler OC1 conducts; otherwise, the light-emitting diode LED1 of the optocoupler OC1 is cut off, and the optocoupler OC1 does not work.

[0074] Reference Figure 2As one implementation of the charging control module 3, the charging control module 3 may adopt the fast charging protocol chip U1.

[0075] Specifically, the fast charging protocol chip U1's pins CS+ and CS- detect the output voltage of the voltage conversion module 2. When the output voltage is detected to be high, the fast charging protocol chip U1's pin OPTO outputs a low-level signal. When the output voltage is detected to be low, the fast charging protocol chip U1's pin OPTO outputs a high-level signal. The signal output from pin OPTO is then transmitted to the adjustment input terminal of the adjustment circuit to control the optocoupler OC1.

[0076] In the above embodiment, when the fast charging protocol chip U1 detects a low output voltage from the voltage conversion module 2, it outputs a high-level signal to the cathode of the optocoupler OC1. At this time, the optocoupler OC1 is not conducting, causing the adjustment signal receiving end of the adjustment chip U2 to maintain a high level. This increases the duty cycle of the output signal at the adjustment signal transmitting end of the adjustment chip U2, thereby increasing the output voltage of the voltage conversion module 2. Conversely, when the fast charging protocol chip U1 detects a high output voltage from the voltage conversion module 2, it outputs a low-level signal to the cathode of the optocoupler OC1. At this time, the optocoupler OC1 conducts, pulling the level of the adjustment signal receiving end of the adjustment chip low, i.e., providing a low-level signal to the adjustment signal receiving end of the adjustment chip U2. This reduces the duty cycle of the output signal at the adjustment signal transmitting end of the adjustment chip U2, thereby decreasing the output voltage of the voltage conversion module 2. This achieves the adjustment of the output voltage of the voltage conversion module 2 to enable fast charging for the terminal device.

[0077] Reference Figure 4 As one implementation of the transmission interface 1, the transmission interface 1 adopts a TYPE-C interface, that is, the transmission interface 1 includes a TYPE-C protocol chip U3.

[0078] Specifically, pins VBUS1 and VBUS2 of the TYPE-C protocol chip U3 are connected to the positive output terminal of the voltage conversion module 2, and pin GND of the TYPE-C protocol chip U3 is connected to the negative output terminal of the voltage conversion module 2, thereby realizing the effect of transmitting the output voltage of the voltage conversion module 2 to the terminal device through the TYPE-C protocol chip U3.

[0079] Reference Figure 2 As a further embodiment of the charging circuit, the charging circuit also includes a protection circuit, which is used to control the on / off state of the positive output terminal of the voltage conversion module 2 and the transmission interface 1.

[0080] Reference Figure 2As one implementation of the protection circuit, the charging control module 3 also includes a switch signal output terminal. The protection circuit includes an NMOS transistor Q1, the drain of which is connected to the positive output terminal of the voltage conversion module 2, the source of which is connected to the transmission interface 1, and the gate of which is connected to the switch signal output terminal of the charging control module 3.

[0081] Specifically, when the charging control module 3 uses the fast charging protocol chip U1, pin CC1 of the fast charging protocol chip U1 is connected to pin CC1 of the TYPE-C protocol chip U3 to detect whether the TYPE-C protocol chip U3 has a terminal device connected. When pin CC1 of the fast charging protocol chip U1 detects that a terminal device has been connected, pin NDRV of the fast charging protocol chip U1 outputs a high level, and NMOS transistor Q1 is turned on. When pin CC1 of the fast charging protocol chip U1 does not detect that a terminal device has been connected, pin NDRV of the fast charging protocol chip U1 outputs a low level, and NMOS transistor Q1 is turned off.

[0082] In the above embodiment, when a terminal device is connected to the transmission interface 1, the switching signal output terminal of the charging control module 3 outputs a high level. The gate of the NMOS transistor Q1 receives the high-level signal and conducts, thus connecting the positive output terminal of the voltage conversion module 2 to the transmission interface 1. At this time, the voltage conversion unit supplies power to the terminal device through the transmission interface 1. When no terminal device is connected to the transmission interface 1, the NMOS transistor Q1 is turned off, the positive output terminal of the voltage conversion module 2 is disconnected from the transmission interface 1, and there is no voltage at the transmission interface 1, improving safety.

[0083] Reference Figure 2 As a further implementation of the protection circuit, the protection circuit also includes a light-emitting diode LED1 and a third resistor R3. The cathode of the light-emitting diode LED1 is connected to the indicator signal output terminal of the charging control module 3, and the anode is connected to one end of the third resistor R3. The other end of the third resistor R3 is connected to the source of the NMOS transistor Q1.

[0084] Specifically, the indicator signal output terminal of the charging control module 3 can be pin SDA / GPIO2 of the fast charging protocol chip U1. When pin CC1 of the fast charging protocol chip U1 detects that a terminal device is connected, pin SDA / GPIO2 outputs a low-level signal. When NMOS transistor Q1 is turned on, the anode of LED1 is the output voltage of the positive output terminal of voltage conversion module 2, and the cathode is a low-level signal, thus LED1 is turned on, indicating that the terminal device is in a normal charging state. The third resistor R3 is used to protect LED1, reducing the possibility of LED1 being damaged.

[0085] Reference Figure 5As one implementation of the network cable interface 5, the network cable interface 5 adopts an RJ-45 interface.

[0086] Reference Figure 4 , 5 As one implementation of the data control module 6, the data control module 6 includes a network transformer U4 and a data conversion chip U5. The transformer input terminal of the network transformer U4 is connected to the data detection terminal of the data control module 6, the transformer output terminal is connected to the data receiving terminal of the data conversion chip U5, and the data output terminal of the data conversion chip U5 is connected to the data transmission terminal of the data control module 6.

[0087] Specifically, pins P1, P2, P3, P4, P5, P6, P7, and P8 of the RJ-45 interface are connected to pins MX1+, MX1-, MX2+, MX2-, MX3+, MX3-, MX4+, and MX4- of the network transformer U4. Pins TD1+, TD1-, TD2+, TD2-, TD3+, TD3-, TD4+, and TD4- of the network transformer U4 are connected to pins MDIP3, MDIN3, MDIP2, MDIN2, MDIP1, MDIN1, MDIP0, and MDIN0 of the data conversion chip U5. The pins U3SSTXN, U3SSTXP, U3SSRXN, and U3SSRXP of the data conversion chip U5 are connected to the pins SSTX1-, SSTX1+, SSRX1-, and SSRX1+ of the TYPE-C protocol chip U3.

[0088] In the above embodiment, the network data input from the network interface is detected using pins MX1+, MX1-, MX2+, MX2-, MX3+, MX3-, MX4+, and MX4- of the network transformer U4. The network data is then transmitted via pins TD1+, TD1-, TD2+, TD2-, TD3+, TD3-, TD4+, and TD4- to pins MDIP3, MDIN3, MDIP2, and MDIP3 of the data conversion chip U5. Pins MDIN2, MDIP1, MDIN1, MDIP0, and MDIN0 are transmitted via pins U3SSTXN, U3SSTXP, U3SSRXN, and U3SSRXP of data conversion chip U5 to pins SSTX1-, SSTX1+, SSRX1-, and SSRX1+ of TYPE-C protocol chip U3. The TYPE-C protocol chip U3 then transmits the network data to the terminal device, thus achieving the effect of transmitting network data through the transmission port.

[0089] Reference Figure 4 , 5 As a further implementation of the charging circuit, the transmission interface 1 includes a power supply output terminal, and the data conversion chip U5 also includes a backup power supply terminal, with the power supply output terminal connected to the backup power supply terminal.

[0090] Specifically, the power supply output of the transmission interface 1 can be selected from pins D- and D+ of the TYPE-C protocol chip U3, and the backup power supply of the data conversion chip U5 can be selected from pins U2DM and U2DP of the data conversion chip U5.

[0091] In the above embodiment, when the data conversion chip U5 is not connected to an external power source, the voltage conversion module 2 does not work. At this time, the D- and D+ pins of the TYPE-C protocol chip U3 transmit the power stored in the terminal device to the U2DM and U2DP pins of the data conversion chip U5 to power the data conversion chip U5, thereby maintaining the normal transmission of network data.

[0092] This application discloses a fast charging chip that supports Ethernet connectivity. A fast charging chip that supports Ethernet connectivity includes a charging circuit as described above.

[0093] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Any feature disclosed in this specification (including the abstract and drawings) may be replaced by other equivalent or similar features unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is only one example of a series of equivalent or similar features.

Claims

1. A charging circuit supporting an Ethernet connection, characterized by, include: Transmission interface (1) is used to connect to the charging end of the terminal device; The voltage conversion module (2) is used to convert the input voltage into DC voltage and supply power to the transmission interface (1); The charging control module (3) is used to determine whether a terminal device is connected to the transmission interface (1). If so, it generates a voltage control signal. Output regulation module (4) is used to respond to voltage control signal and regulate the DC voltage of voltage conversion module (2) to the charging voltage required by terminal equipment; Network cable interface (5), used for Ethernet access; as well as, The data control module (6) is used to determine whether the network cable interface (5) is connected to the Ethernet. If so, the network data is transmitted to the transmission interface (1). The voltage conversion module (2) includes a first input terminal, a second input terminal, a positive output terminal, and a negative output terminal; The charging control module (3) includes a positive voltage detection terminal, a negative voltage detection terminal, a device detection terminal, and a control signal output terminal. The device detection terminal is connected to the transmission interface (1), the positive voltage detection terminal is connected to the positive output terminal of the voltage conversion module (2), and the negative voltage detection terminal is connected to the negative output terminal of the voltage conversion module (2). The output adjustment module (4) includes a reference input terminal, an adjustment input terminal, an adjustment output terminal and a ground terminal. The adjustment input terminal is connected to the control signal output terminal of the fast charging control circuit, the adjustment output terminal is connected to the first input terminal and the second input terminal of the voltage conversion module (2), and the reference input terminal is connected to the positive output terminal of the voltage conversion module (2). The data control module (6) includes a data detection end and a data transmission end. The data detection end is connected to the network cable interface (5), and the data transmission end is connected to the transmission interface (1). The output adjustment module (4) includes an adjustment chip U2 and an isolation unit; The isolation unit is used to respond to the voltage control signal output by the charging control module (3) and the voltage signal output by the positive output terminal of the voltage conversion module (2), and output a voltage adjustment signal. The regulating chip U2 is used to respond to the voltage regulation signal to control the voltage output of the voltage conversion module (2). The regulating signal receiving end is connected to the isolation unit, and the regulating signal sending end is connected to the regulating output end of the output regulating module (4).

2. A charging circuit supporting an Ethernet connection according to claim 1, characterized in that: The isolation unit includes an optocoupler OC1, a first voltage divider resistor R1, and a second voltage divider resistor R2; The optocoupler OC1 has its anode connected to one end of the first voltage divider resistor R1, its cathode connected to one end of the second voltage divider resistor R2 and the adjustment input terminal of the output adjustment module (4), its collector connected to the adjustment signal receiving terminal of the adjustment chip U2, and its emitter grounded. The other end of the first voltage divider resistor R1 and the other end of the second voltage divider resistor R2 are both connected to the reference input terminal of the output adjustment module (4).

3. A charging circuit supporting an Ethernet connection according to claim 1, characterized in that: The data control module (6) includes a network transformer U4 and a data conversion chip U5. The transformer input terminal of the network transformer U4 is connected to the data detection terminal of the data control module (6), and the transformer output terminal is connected to the data receiving terminal of the data conversion chip U5. The data output terminal of the data conversion chip U5 is connected to the data transmission terminal of the data control module (6).

4. The charging circuit supporting Ethernet connection according to claim 1, characterized in that: It also includes a protection circuit, which is used to control the on / off state of the positive output terminal of the voltage conversion module (2) and the transmission interface (1).

5. A charging circuit according to claim 4, wherein: The charging control module (3) also includes a switch signal output terminal. The protection circuit includes an NMOS transistor Q1. The drain of the NMOS transistor Q1 is connected to the positive output terminal of the voltage conversion module (2), the source is connected to the transmission interface (1), and the gate is connected to the switch signal output terminal of the charging control module (3).

6. A charging circuit supporting an Ethernet connection according to claim 3, characterized in that: The transmission interface (1) includes a power supply output terminal, and the data conversion chip U5 also includes a backup power supply terminal, the power supply output terminal being connected to the backup power supply terminal.

7. A charging circuit supporting an Ethernet connection according to claim 5, characterized in that: It also includes a light-emitting diode LED1 and a third resistor R3. The cathode of the light-emitting diode LED1 is connected to the indicator signal output terminal of the charging control module (3), and the anode is connected to one end of the third resistor R3. The other end of the third resistor R3 is connected to the source of the NMOS transistor Q1.

8. A fast charging chip supporting an Ethernet connection, characterized in that: Includes a charging circuit that supports Ethernet connectivity as described in any one of claims 1 to 7.

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