Interface expander and electronic equipment
The data conversion chip and auxiliary power supply module of the interface expander solve the problem of high complexity in expanding the sockets of electronic equipment, and achieve simple and efficient expansion of the number of sockets and stable data interaction.
Patent Information
- Application Number
- CN202422662484.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-31
- Publication Date
- 2025-09-26
- Estimated Expiration
- 2034-10-31
AI Technical Summary
In the prior art, the socket expansion method of electronic devices is highly complex and inefficient, and requires the controller of the electronic device to be customized for replacement, resulting in extremely high cost and time costs.
An interface expander is used to realize data conversion between the first interface and the second interface through a data conversion chip, and the second interface is powered by an auxiliary power module, which simplifies the socket expansion process.
It achieves simple and efficient expansion of the number of sockets, reduces operating costs and time costs, and ensures the stability of data interaction.
Smart Images
Figure CN223390914U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of device interface expansion, in particular to an interface expander and electronic equipment. Background Art
[0002] Sockets are one of the media used by electronic devices to exchange data. However, due to the limitations of electronic device controllers, the number of commonly used sockets on electronic devices is also limited. If the number of commonly used sockets on an electronic device needs to be expanded, the controller of the electronic device must be customized and replaced. Customizing and replacing the controller is extremely costly and time-consuming. In other words, the existing socket expansion methods for electronic devices are highly complex and inefficient. Utility Model Content
[0003] The purpose of the present invention is to overcome the shortcomings and deficiencies in the prior art and to provide an interface expander and an electronic device that can simply and efficiently expand the number of sockets.
[0004] An embodiment of the present invention provides an interface expander, comprising: a first interface, a data conversion chip, a plurality of second interfaces, and an auxiliary power supply module; the first interface comprises a first data terminal and a second data terminal; the data conversion chip comprises a first connection terminal and a plurality of second connection terminals; the second interface comprises a sub-interface power input terminal and a third data terminal; the auxiliary power supply module comprises a first power input terminal and a first power output terminal;
[0005] The first data terminal of the first interface is used to connect to the data connection terminal of the target device, the second data terminal of the first interface is connected to the first connection terminal of the data conversion chip, and each second connection terminal of the data conversion chip is connected to each third data terminal of the second interface in a one-to-one correspondence; the target device is an electronic device whose interface is to be expanded;
[0006] The first power input terminal of the auxiliary power module is used to connect to the first power supply connection terminal of the target device, and the first power output terminal of the auxiliary power module is used to connect to the sub-interface power input terminal of each second interface to supply power to each second interface.
[0007] A second embodiment of the present application provides an electronic device, including a circuit board and an interface expander as described above; the interface expander is connected to the circuit board.
[0008] Compared with the prior art, the first data end of the first interface of the interface expander of the present invention is used to connect to the data connection end of the target device, the second data end of the first interface is connected to the first connection end of the data conversion chip, and each second connection end of the data conversion chip is correspondingly connected to the third data end of each second interface. The data conversion chip can be used to realize data conversion between the first interface and the second interface to expand the data connection end of the target device into multiple second interfaces, and the auxiliary power supply module can be used to power each second interface so that each second interface can stably perform data interaction. Therefore, it is only necessary to connect the first data end of the first interface to the data connection end of the target device and connect the first power input end of the auxiliary power supply module to the first power supply connection end of the target device to successfully expand multiple second interfaces for the target device, and the expansion of the number of sockets can be achieved simply and efficiently.
[0009] In order to more clearly understand the present invention, the specific embodiments of the present invention will be described below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 This is a schematic diagram of module connections of an interface expander according to an embodiment of the present invention.
[0011] Figure 2 This is a first schematic diagram of an auxiliary power module according to an embodiment of the present invention.
[0012] Figure 3 This is a schematic diagram of a first power protection module according to an embodiment of the present invention.
[0013] Figure 4 This is a second schematic diagram of an auxiliary power module according to an embodiment of the present invention.
[0014] Figure 5 This is a schematic diagram of a second power protection module according to an embodiment of the present invention.
[0015] Figure 6 This is a schematic diagram of an interface power protection module according to an embodiment of the present invention.
[0016] Figure 7 Schematic diagram of a data terminal current protection module according to an embodiment of the present invention.
[0017] Figure 8 FIG. 1 is a schematic diagram of a resistance isolation module according to an embodiment of the present invention.
[0018] Figure 9 This is a schematic diagram of a passive crystal oscillator module according to an embodiment of the present invention.
[0019] Figure 10This is a schematic diagram of an active crystal oscillator module according to an embodiment of the present invention.
[0020] Figure 11 The figure is a schematic diagram of an electronic device according to an embodiment of the present invention.
[0021] 1. Interface expander; 11. First interface; 13. Data conversion chip; 15. Second interface; 17. Auxiliary power module; 171. First power protection module; 173. Second power protection module; 175. Interface power conversion module; 191. Interface power protection module; 193. Data end current protection module; 195. Resistor isolation module; 197. Passive crystal oscillator module; 199. Active crystal oscillator module; 10. Electronic device; 2. Circuit board. DETAILED DESCRIPTION
[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0023] The number and type of sockets on electronic devices is limited by their controllers, which in turn limits the number of commonly used sockets. Expanding the number of commonly used sockets often requires customizing the controller. Customizing and replacing controllers is both extremely expensive and time-consuming, making expanding the number of sockets on electronic devices highly complex and inefficient.
[0024] The interface expander 1 of the present invention can realize data conversion between the first interface 11 and the second interface 15 through the data conversion chip 13, so as to expand the data connection end of the target device into multiple second interfaces 15, and can power each second interface 15 through the auxiliary power module 17, so that each second interface 15 can stably perform data exchange.
[0025] See also Figure 1 , which is a module connection diagram of an interface expander 1 according to an embodiment of the present invention. The interface expander 1 includes: a first interface 11, a data conversion chip 13, multiple second interfaces 15, and an auxiliary power module 17; the first interface 11 includes a first data terminal and a second data terminal; the data conversion chip 13 includes a first connection terminal and multiple second connection terminals; the second interface 15 includes a sub-interface power input terminal and a third data terminal; the auxiliary power module 17 includes a first power input terminal and a first power output terminal;
[0026] The first data terminal of the first interface 11 is used to connect to the data connection terminal of the target device, the second data terminal of the first interface 11 is connected to the first connection terminal of the data conversion chip 13, and each second connection terminal of the data conversion chip 13 is connected to the third data terminal of each second interface 15 in a one-to-one correspondence; the target device is the electronic device whose interface is to be expanded;
[0027] The first power input terminal of the auxiliary power module 17 is used to connect to the first power supply connection terminal of the target device, and the first power output terminal of the auxiliary power module 17 is used to connect to the sub-interface power input terminal of each second interface 15 to supply power to each second interface 15.
[0028] The first interface 11 of this embodiment is an internal interface for the inside of the electronic device, which can be used to connect to the data connection end of the target device set inside, wherein the data connection end of the target device refers to the data connection end on the circuit board inside the target device, such as the PCIE (peripheral component interconnect express, a high-speed serial computer expansion bus standard) interface on the circuit board.
[0029] The second interface 15 is an external interface for connecting to other electronic devices or storage hardware, such as a commonly used USB interface, etc. The second interface 15 can be a USB interface model with the fastest data transmission speed, including but not limited to a USB 3.0 interface, etc.
[0030] The auxiliary power module 17 is a circuit module connected to the first power supply connection terminal of the target device. The first power supply connection terminal of the target device can be a power output terminal independent of the power supply component within the target device, such as the power output terminal of a common computer power supply (ATX). The power supply voltage output by the ATX is generally 12V or 5V. After the auxiliary power module 17 is connected to the output terminal of the ATX, it can supply power to the second interface 15 based on the power output of the ATX, allowing the second interface 15 to stably exchange data with the connected external device. The power supply component within the target device can also power the circuit board within the target device.
[0031] Compared with the prior art, the first data end of the first interface 11 of the interface expander 1 of the present invention is used to connect to the data connection end of the target device, the second data end of the first interface 11 is connected to the first connection end of the data conversion chip 13, and each second connection end of the data conversion chip 13 is correspondingly connected to the third data end of each second interface 15. The data conversion chip 13 can be used to realize data conversion between the first interface 11 and the second interface 15 to expand the data connection end of the target device into multiple second interfaces 15, and the auxiliary power supply module 17 can be used to power each second interface 15 so that each second interface 15 can stably perform data interaction. Therefore, it is only necessary to connect the first data end of the first interface 11 to the data connection end of the target device and connect the first power input end of the auxiliary power supply module 17 to the first power supply connection end of the target device to successfully expand multiple second interfaces 15 for the target device, and the expansion of the number of sockets can be achieved simply and efficiently.
[0032] See also Figure 2 In a feasible embodiment, the auxiliary power supply module 17 includes a first power supply protection module 171, and the first power supply protection module 171 includes a second power supply input terminal and a second power supply output terminal; the second power supply input terminal of the first power supply protection module 171 is the first power supply input terminal of the auxiliary power supply module 17, and the second power supply output terminal of the first power supply protection module 171 is the first power supply output terminal of the auxiliary power supply module 17.
[0033] The first power protection module 171 includes a second power input terminal for connecting to the output terminal of the ATX that outputs a 5V power voltage. This is because the power output from the second power output terminal of the first power protection module 171 is used to power the second interface 15, and the operating voltage required by the second interface 15 is generally 5V. Therefore, it is only necessary to connect the output terminal of the ATX that outputs the 5V power voltage to the second power input terminal of the first power protection module 171 to power the second interface 15 through the ATX. Moreover, because the second interface 15 can be powered directly by the 5V power output of the ATX, in this embodiment, the interface expander 1 does not need to be additionally designed with an interface power conversion module 175, which can reduce the production cost of the interface expander 1. It should be noted that the first power supply protection module 171 may include two second power supply output terminals, and the two second power supply output terminals of the first power supply protection module 171 can respectively power different second interfaces 15. For example, if the number of second interfaces 15 is 2, the two second power supply output terminals of the first power supply protection module 171 respectively power one second interface 15; if the number of second interfaces 15 is 4, the two second power supply output terminals of the first power supply protection module 171 respectively power two second interfaces 15.
[0034] like Figure 3As shown, the first power protection module 171 includes several first magnetic beads NS, a protection diode D1, and capacitors C50 and C51. The first end of the first magnetic bead NS is the second power input terminal of the first power protection module 171, and the second end of the first magnetic bead NS is the second power output terminal of the first power protection module 171. The first end of the first magnetic bead NS is connected to the cathode of the protection diode D1, and the anode of the protection diode D1 is grounded. The first end of the first magnetic bead NS is grounded via several capacitors, that is, it can be grounded via capacitors C50 and C51 respectively. Magnetic beads can be used to suppress high-frequency noise and spike interference of the power supply. By absorbing and isolating high-frequency electromagnetic waves, the magnetic beads can effectively reduce electromagnetic interference (EMI), thereby protecting the stable operation of the circuit. Among them, in order to improve the convenience of connecting the first power protection module 171 with the ATX, a terminal PWR1 can be added, and the terminal 1 of the terminal PWR1 is connected to the first power protection module 171. When the user connects the terminal 1 of the terminal PWR1 to the output end of the ATX output 5V power supply voltage, the first power protection module 171 can be connected to the output end of the ATX output 5V power supply voltage.
[0035] In this embodiment, the first power protection module 171 connected to the output terminal of the ATX outputting 5V power voltage can stably supply power to the second interface 15 and also save the production cost of the interface expander 1.
[0036] See also Figure 4 In another feasible embodiment, the first interface 11 further includes a main interface power input terminal and a first interface power output terminal; the auxiliary power module 17 includes a second power protection module 173 and at least one interface power conversion module 175; the second power protection module 173 includes a third power input terminal, a fourth power input terminal, and a third power output terminal;
[0037] The third power input terminal of the second power protection module 173 is the first power input terminal of the auxiliary power module 17; the main interface power input terminal of the first interface 11 is connected to the second power connection terminal of the target device; the voltage of the second power connection terminal of the target device is higher than the first power connection terminal of the target device;
[0038] The first interface power output end of the first interface 11 is connected to the fourth power input end of the second power protection module 173; the third power output end of the second power protection module 173 is connected to the first end of each interface power conversion module 175, and the second end of each interface power conversion module 175 is the first power output end of the auxiliary power module 17.
[0039] The third power input terminal of the second power protection module 173 is used to connect to the output terminal of the ATX that outputs a 12V power voltage. The third power output terminal of the second power protection module 173 then outputs 12V power to the interface power conversion module 175. The interface power conversion module 175 converts the 12V power into a 5V power supply to power the second interface 15. The interface power conversion module 175 can convert the 12V power voltage output by the ATX into a suitable operating voltage for the second interface 15 to stably supply power to the second interface 15. In order to improve the convenience of connecting the second power protection module 173 to the ATX, a wiring terminal PWR1 can be added. Terminal 4 of the wiring terminal PWR1 is connected to the second power protection module 173. When the user connects terminal 4 of the wiring terminal PWR1 to the output terminal of the ATX that outputs a 12V power voltage, the second power protection module 173 and the output terminal of the ATX that outputs a 12V power voltage are connected.
[0040] The first interface 11 of this embodiment includes a row of conductive tabs, which are used to connect to the data connection terminal and the second power connection terminal of the target device. Since the conductive tabs are generally golden in color, they are also called "Gold Finger". That is, the first data terminal of the first interface 11 and the main interface power input terminal are realized through the Gold Finger, and the second power connection terminal of the target device is the power output terminal of the circuit board inside the target device. Therefore, the second power connection terminal of the target device and the data connection terminal of the target device can be set on the same interface of the circuit board. Therefore, the first interface 11 can exchange data with the data connection terminal of the target device through the Gold Finger while obtaining the power output from the second power connection terminal of the target device. Then, after power conversion through the chip power conversion module, the chip power is obtained to supply power to the data conversion chip 13, so that the data conversion chip 13 can complete the data conversion between the second data terminal of the first interface 11 and the third data terminal of the second interface 15 under the condition of power support.
[0041] Among them, when the main interface power input terminal of the first interface 11 is connected to the second power supply connection terminal of the target device, the second power supply connection terminal of the target device outputs a 12V power supply voltage to the main interface power input terminal of the first interface 11, and the first interface power output terminal of the first interface 11 is connected to the fourth power input terminal of the second power protection module 173, so as to output a 12V power supply voltage to the interface power conversion module 175 through the second power protection module 173. The interface power conversion module 175 converts the 12V power supply into a 5V power supply to power the second interface 15, thereby realizing the conversion of the 12V power supply voltage output by the second power supply connection terminal of the target device into a working voltage suitable for the second interface 15, so as to stably supply power to the second interface 15.
[0042] In this embodiment, the interface power conversion module 175 converts the 12V power output by the second power protection module 173 into a 5V power supply to power the second interface 15 , so that the second interface 15 can stably perform data exchange.
[0043] See also Figure 5 In a feasible embodiment, the second power protection module 173 includes a first diode D5, a second diode D6 and a power protection module.
[0044] The anode of the first diode D5 is the third power input terminal of the second power protection module 173, and the cathode of the first diode D5 is connected to the input terminal of the power protection module; the anode of the second diode D6 is the fourth power input terminal of the second power protection module 173, and the cathode of the second diode D6 is connected to the input terminal of the power protection module; the output terminal of the power protection module is the third power output terminal of the second power protection module.
[0045] Specifically, when the first data terminal of the first interface 11 is connected to the second power supply connection terminal of the target device, and the third power input terminal of the second power protection module 173 is connected to the first power supply connection terminal of the target device, there is input voltage at the third power input terminal and the fourth power input terminal of the second power protection module 173. The first diode and the second diode can prevent the third power input terminal and the fourth power input terminal of the second power protection module 173 from current reverse flow due to the voltage difference, so as to protect the safe operation of the circuit.
[0046] The power protection module can include a fuse PF2 and second ferrite beads B15 and B16. The first end of fuse PF2 serves as the input of the power protection module, while the second end of fuse PF2 serves as the output of the module. Second ferrite beads B15 and B16 are connected in parallel to both ends of fuse PF2. Magnetic beads can be used to suppress high-frequency noise and spike interference from the power supply. By absorbing and isolating high-frequency electromagnetic waves, they can effectively reduce electromagnetic interference (EMI), thereby protecting the stable operation of the circuit. Fuses can be used to cut off the current when the power supply current abnormally rises to a certain level and temperature, thereby protecting the safe operation of the circuit.
[0047] Optionally, the output end of the power protection module can be grounded via filter capacitor C54 and filter capacitor C55 respectively.
[0048] In this embodiment, the first diode D5 and the second diode D6 can prevent the second power protection module 173 from reverse current flow, thereby protecting the safe operation of the circuit.
[0049] In a feasible embodiment, the interface expander 1 further includes a plurality of interface power protection modules 191, each of which includes a power input terminal, a power output terminal, a detection current output terminal, and an enable terminal; the data conversion chip 13 includes a detection current input terminal and an enable drive terminal;
[0050] The power output end of the auxiliary power supply module 17 is connected to the power input end of each interface power protection module 191, and the power output end of each interface power protection module 191 is connected to the corresponding second interface 15; the detection current output end of the interface power protection module 191 is connected to the detection current input end of the data conversion chip 13, and is used to output the current signal flowing through the interface power protection module 191 to the data conversion chip 13; the enable drive end of the data conversion chip 13 is connected to the enable end of each interface power protection module 191.
[0051] See also Figure 6 , which is a circuit diagram of an interface power protection module of this embodiment. The interface power protection module is a power protection chip UUA4. Pin 5 of the power protection chip UUA4 is the power input terminal of the data conversion chip 13. Pin 1 of the power protection chip UUA4 is the power output terminal of the data conversion chip 13. Pin 3 of the power protection chip UUA4 is the detection current output terminal of the data conversion chip 13. Pin 4 of the power protection chip UUA4 is the enable terminal of the data conversion chip 13. Among them, the data conversion chip 13 can determine whether the current flowing through the corresponding power protection chip UUA4 is within a preset normal current value range based on the current signal output by pin 3 of the power protection chip UUA4. When the current flowing through the power protection chip UUA4 is within the normal current value range, the enable drive terminal of the data conversion chip 13 outputs a first enable signal to pin 4 of the corresponding power protection chip UUA4, allowing the power protection chip UUA4 to operate normally. Pin 1 of the power protection chip UUA4 transmits the power voltage output by the auxiliary power module 17 to the corresponding second interface 15.
[0052] When the current flowing through the interface power protection module 191 exceeds the normal current value range, the enable drive end of the data conversion chip 13 outputs a second enable signal to the enable end of the corresponding interface power protection module 191, causing the interface power protection module 191 to stop running, and the interface power protection module 191 stops transmitting the power voltage output by the auxiliary power module 17 to the corresponding second interface 15 to protect the second interface 15.
[0053] In this embodiment, the power input of each second interface 15 can be protected by the data terminal current protection module 193 .
[0054] In a feasible embodiment, the interface expander 1 further includes multiple data terminal current protection modules 193; the first end of each data terminal current protection module 193 is connected to the third data terminal of the second interface 15; and the second end of each data terminal current protection is grounded.
[0055] Each data terminal current protection module 193 includes at least one electrostatic protection chip; the electrostatic protection chip includes a plurality of electrostatic input terminals and at least one electrostatic output terminal.
[0056] The multiple electrostatic input terminals of the electrostatic protection chip serve as the first terminals of the data terminal current protection module 193 ; the electrostatic output terminals of the electrostatic protection chip serve as the second terminals of the data terminal current protection module 193 .
[0057] Among them, when the second interface 15 is a USB interface, since the USB interface includes 6 third data terminals, and an electrostatic protection chip has only 4 electrostatic input terminals, it is possible to adopt an arrangement in which two electrostatic protection chips correspond to one second interface 15, or three electrostatic protection chips correspond to two second interfaces 15.
[0058] See also Figure 7 , which is a circuit diagram of a data terminal current protection module 193 of this embodiment, the USB interface is USB3_S2, and the electrostatic protection chips are DUA8 and DUA7. Among them, 4 of the 6 third data terminals of USB3_S2 ( Figure 7 The USB_5G_TX_R_DN3, USB_5G_TX_R_DP3, USB2_P3_R_DP, USB2_P3_R_DN) are connected to the four electrostatic input terminals of the electrostatic protection chip DUA8, and two of the six third data terminals of USB3_S2 ( Figure 7 The USB_5G_RX_R_DP3 and USB_5G_RX_R_DN3 in the USB_5G_RX_R_DP3 are respectively connected to the two electrostatic input terminals of the electrostatic protection chip DUA7.
[0059] Specifically, each electrostatic input terminal of the electrostatic protection chip is connected to the cathode of a diode, and the anode of the diode is grounded. When a third data terminal of the second interface 15 has too much current due to static electricity, the diode connected to the corresponding electrostatic input terminal will be reversely broken down, so that the current of the third data terminal can flow to the ground, thereby avoiding excessive current at the third data terminal of the second interface 15 to protect the safe operation of the circuit.
[0060] In a feasible embodiment, the interface expander 1 further includes a resistance isolation module 195 , and the second interface 15 includes a ground terminal. The ground terminal of the second interface 15 is grounded via the resistance isolation module 195 .
[0061] See also Figure 8 The resistance isolation module 195 can be a resistor R60. Through the resistance isolation module 195, the second interface 15 can be isolated from the external ground terminal, which can improve the signal stability of the second interface and prevent the external interference of the interface expander 1 from causing data signal abnormality in the second interface 15.
[0062] In a feasible embodiment, the interface expander 1 further includes a plurality of crystal oscillator modules, which are connected to the data conversion chip 13 , and each crystal oscillator module outputs a different clock signal.
[0063] The plurality of crystal oscillator modules may include a passive crystal oscillator module 197 and an active crystal oscillator module 199. The passive crystal oscillator module 197 may output a 12 MHz clock signal, and the active crystal oscillator module 199 may output a 24 MHz or 48 MHz clock signal.
[0064] See also Figure 9 The passive crystal oscillator module 197 includes a first passive crystal oscillator connection terminal XSCO and a second passive crystal oscillator connection terminal XSCI, the conversion chip includes a third passive crystal oscillator connection terminal and a fourth passive crystal oscillator connection terminal, the first passive crystal oscillator connection terminal XSCO and the second passive crystal oscillator connection terminal XSCI of the passive crystal oscillator module 197 are respectively connected to the data conversion chip 13 including the third passive crystal oscillator connection terminal and the fourth passive crystal oscillator connection terminal to provide a 12MHz clock signal to the data conversion chip 13.
[0065] See also Figure 10 The active crystal oscillator module 199 includes a first active crystal oscillator connection terminal XCK, and the data conversion chip 13 includes a second active crystal oscillator connection terminal. The first active crystal oscillator connection terminal XCK of the 24MHz crystal oscillator chip is connected to the second active crystal oscillator connection terminal of the data conversion chip 13 to provide a 24MHz or 48MHz clock signal to the data conversion chip 13.
[0066] In this embodiment, multiple crystal oscillator modules may be used to provide clock signals of different frequencies to the data conversion chip 13 .
[0067] See also Figure 11 The second embodiment of the present application provides an electronic device 10 , including: a circuit board 2 , and the above-mentioned interface expander 1 ; the interface expander 1 is connected to the circuit board 2 .
[0068] It should be noted that the electronic device provided in the second embodiment of the present application and the interface expander provided in the first embodiment of the present application have the same concept, and the implementation process thereof is detailed in the first embodiment and will not be repeated here.
[0069] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. An interface expander, characterized in that: include: A first interface, a data conversion chip, a plurality of second interfaces, and an auxiliary power supply module; the first interface includes a first data terminal and a second data terminal; the data conversion chip includes a first connection terminal and a plurality of second connection terminals; the second interface includes a sub-interface power input terminal and a third data terminal; the auxiliary power supply module includes a first power input terminal and a first power output terminal; The first data end of the first interface is used to connect to the data connection end of the target device, the second data end of the first interface is connected to the first connection end of the data conversion chip, and each second connection end of the data conversion chip is connected to each third data end of the second interface in a one-to-one correspondence; the target device is an electronic device whose interface is to be expanded; The first power input end of the auxiliary power module is used to connect to the first power supply connection end of the target device, and the first power output end of the auxiliary power module is used to connect to the sub-interface power input end of each second interface to supply power to each second interface.
2. The interface expander according to claim 1, wherein: The auxiliary power supply module includes a first power supply protection module, which includes a second power supply input terminal and a second power supply output terminal; the second power supply input terminal of the first power supply protection module is the first power supply input terminal of the auxiliary power supply module, and the second power supply output terminal of the first power supply protection module is the first power supply output terminal of the auxiliary power supply module.
3. The interface expander according to claim 2, wherein: The first power protection module includes a first magnetic bead, a protection diode and a plurality of capacitors; The first end of the first magnetic bead is the second power input end of the first power protection module, and the second end of the first magnetic bead is the second power output end of the first power protection module; the first end of the first magnetic bead is connected to the cathode of the protection diode, the anode of the protection diode is grounded, and the first ends of the first magnetic bead are grounded via the several capacitors respectively.
4. The interface expander according to claim 1, wherein: The first interface further includes a main interface power input terminal and a first interface power output terminal; the auxiliary power module includes a second power protection module and at least one interface power conversion module; The second power protection module includes a third power input terminal, a fourth power input terminal and a third power output terminal; The third power input terminal of the second power protection module is the first power input terminal of the auxiliary power module; the main interface power input terminal of the first interface is connected to the second power connection terminal of the target device; the voltage of the second power connection terminal of the target device is higher than the first power connection terminal of the target device; The first interface power output terminal of the first interface is connected to the fourth power input terminal of the second power protection module; The third power output end of the second power protection module is connected to the first end of each of the interface power conversion modules, and the second end of each of the interface power conversion modules is the first power output end of the auxiliary power module.
5. The interface expander according to claim 4, wherein: The second power protection module includes a first diode, a second diode and a power protection module; The anode of the first diode is the third power input terminal of the second power protection module, and the cathode of the first diode is connected to the input terminal of the power protection module; the anode of the second diode is the fourth power input terminal of the second power protection module, and the cathode of the second diode is connected to the input terminal of the power protection module; the output terminal of the power protection module is the third power output terminal of the second power protection module.
6. The interface expander according to claim 5, wherein: The power protection module includes a fuse and a second magnetic bead; The first end of the fuse is the input end of the power protection module, the second end of the fuse is the output end of the power protection module, and the second magnetic bead is connected in parallel to both ends of the fuse.
7. The interface expander according to any one of claims 1 to 6, characterized in that: The interface expander further includes a plurality of interface power protection modules, each of which includes a power input terminal, a power output terminal, a detection current output terminal, and an enable terminal; the data conversion chip includes a detection current input terminal and an enable drive terminal; The power output end of the auxiliary power module is connected to the power input end of each of the interface power protection modules, and the power output end of each of the interface power protection modules is connected to the corresponding second interface; The detection current output end of the interface power protection module is connected to the detection current input end of the data conversion chip, and is used to output the current signal flowing through the interface power protection module to the data conversion chip; the enable drive end of the data conversion chip is connected to the enable end of each of the interface power protection modules.
8. The interface expander according to any one of claims 1 to 6, characterized in that: The interface expander further includes a plurality of data end current protection modules; a first end of each of the data end current protection modules is connected to the third data end of the second interface; and a second end of each of the data end current protection modules is grounded.
9. The interface expander according to claim 8, wherein: Each of the data terminal current protection modules includes at least one electrostatic protection chip; the electrostatic protection chip includes a plurality of electrostatic input terminals and at least one electrostatic output terminal; The multiple electrostatic input terminals of the electrostatic protection chip serve as the first terminals of the data terminal current protection module; The electrostatic output terminal of the electrostatic protection chip serves as the second terminal of the data terminal current protection module.
10. The interface expander according to claim 1, wherein: The interface expander further includes a resistance isolation module, the second interface includes a ground terminal, and the ground terminal of the second interface is grounded via the resistance isolation module.
11. The interface expander according to claim 1, wherein: The interface expander further includes a plurality of crystal oscillator modules, which are connected to the data conversion chip, and each of the crystal oscillator modules outputs a different clock signal.
12. An electronic device, characterized in that: It comprises a circuit board and an interface expander according to any one of claims 1 to 11; the interface expander is connected to the circuit board.