Circuit and system for realizing TYPEC expansion application based on POGO thimble

Abstract

The utility model provides a circuit and a system for realizing TYPEC expansion application based on a POGO thimble, the circuit for realizing TYPEC expansion application based on the POGO thimble comprises a power supply, an interface circuit, a power supply adjusting circuit, a data control circuit and an expansion input and output circuit, the output end of the power supply is connected with the input end of the power supply adjusting circuit, and the output end of the data control circuit is connected with the output end of the expansion input and output circuit. The output end of the interface circuit is connected with the input end of the power supply adjusting circuit and the input end of the data control circuit, the output end of the power supply adjusting circuit is connected with a power supply module of the tablet computer and the input end of the expansion input and output circuit, and the data control circuit is connected with the input end of the expansion input and output circuit. And the output end of the expansion input / output circuit is connected with the expansion interface. By using the circuit, the problems of the tablet personal computer in the prior art can be effectively solved, the shunted signals are expanded into interfaces with different functions for use, and the use requirements of users for expanding different functions can be met.

Description

TECHNICAL FIELD

[0001] The utility model relates to a tablet computer technical field, concretely relates to a circuit and system based on POGO thimble realize TYPEC expansion application. BACKGROUND

[0002] With the development of science and technology and society, more and more electronic equipment enters our work and life, and the tablet computer belongs to one kind of electronic equipment, and the tablet computer is also called portable computer, is a kind of small, portable personal computer, and touch screen is used as basic input device, and the development status of tablet computer is mainly reflected in the expansion of market scale, the diversification of product form, the wide application field and the like.

[0003] Although the tablet computer of present stage is integrated with rich functions, but expansion capacity is weak, is only provided with a Type-C interface, and the number is less, cannot realize more rich function use, and the interface type of communication with external device is single, cannot satisfy the use demand of user, and is not conducive to improving the competitiveness of product. INVENTION CONTENTS

[0004] To solve the problems in the prior art, the utility model provides a circuit and system based on POGO thimble realize TYPEC expansion application.

[0005] The utility model discloses a circuit based on POGO thimble realizes TYPEC expansion application, including power supply, interface circuit, power supply adjusting circuit, data control circuit and expansion input output circuit, the output of power supply is connected with the input of power supply adjusting circuit, the output of interface circuit is connected with the input of power supply adjusting circuit and the input of data control circuit respectively, the output of power supply adjusting circuit is connected with the power supply module of tablet computer and the input of expansion input output circuit respectively, data control circuit is connected with the input of expansion input output circuit, the output of expansion input output circuit is connected with expansion interface, and data control circuit can amplify the signal of interface circuit and expand signal to expansion input output circuit.

[0006] The utility model makes further improvement, is provided with connecting interface on interface circuit, is provided with 27 contacts in connecting interface, and the input of data control circuit is connected with the 1st, 2nd, 4th, 5th, 7th, 8th, 10th, 11th contact of connecting interface, and the input of power supply adjusting circuit is connected with the 19th and 20th contact of connecting interface.

[0007] The utility model discloses further improve, and power supply adjustment circuit includes charging chip U4, resistance R15, field effect transistor Q1, resistance R11, resistance R17, field effect transistor Q2, resistance R12, power management chip U1, inductance L1, fuse R11705 and extension module power management chip U2, is provided with 40 pins on charging chip U4, and power management chip U1 is provided with 33 pins, and extension module power management chip U2 is provided with 32 pins, and charging chip U4 18th and 20th pin are connected with the 19th and 20th contact of connection interface, and charging chip U4 31st pin is connected with the gate of field effect transistor Q1 through resistance R15, and the drain of field effect transistor Q1 is connected with the 12th pin of power management chip U1 through resistance R11, and charging chip U4 32nd pin is connected with the gate of field effect transistor Q2 through resistance R17, and the drain of field effect transistor Q2 is connected with the 12th pin of power management chip U1 through resistance R12, and the 15th, 16th, 20th, 21st, 22nd, 23rd and 34th pin of power management chip U1 are connected with the input end of fuse R11705 through inductance L1, and the output end of fuse R11705 is connected with the power supply module of tablet computer and the 1st, 2nd, 3rd, 4th, 5th and 32nd pin of extension module power management chip U2 respectively, and the 20th, 21st, 22nd, 23rd, 24th and 25th pin of extension module power management chip U2 are connected with extension input output circuit.

[0008] The utility model discloses further improve, and be provided with interface switch chip U6 on data control circuit, be provided with 41 pins on interface switch chip U6, and extension input output circuit includes HDMI interface circuit and network mouth extension circuit, and the 9th, 10th, 12th, 13th, 15th, 16th, 18th and 19th pin of interface switch chip U6 are connected with the 1st, 2nd, 4th, 5th, 7th, 8th, 10th, 11th contact of connection interface, and the 40th, 39th, 37th, 36th, 34th, 33rd, 31st and 30th pin of interface switch chip U6 are connected with the input end of HDMI interface circuit, and the output end of HDMI interface circuit is connected with HDMI interface, and the 4th, 5th, 7th and 8th pin of interface switch chip U6 are connected with the input end of network mouth extension circuit, and the output end of network mouth extension circuit is connected with gigabit network mouth.

[0009] The utility model discloses further improve, and HDMI interface circuit includes HDMI signal conversion chip U5, and be provided with 49 pins on HDMI signal conversion chip U5, and the 38th, 39th, 41st, 42nd, 44th, 45th, 47th and 48th pin of HDMI signal conversion chip U5 are connected with the 40th, 39th, 37th, 36th, 34th, 33rd, 31st and 30th pin of interface switch chip U6, and the 23rd, 22nd, 20th, 19th, 17th, 16th, 14th and 13th pin of HDMI signal conversion chip U5 are connected with HDMI interface.

[0010] The utility model discloses further improve, and the network mouth expansion circuit includes the collection line control chip U13, network mouth conversion chip U15 and network mouth transformer chip U16, is provided with 64 pins on collection line control chip U13, is provided with 49 pins on network mouth conversion chip U15, is provided with 24 pins on network mouth transformer chip U16, and the 42nd, 41st, 39th and 38th pin of collection line control chip U13 are connected with the 4th, 5th, 7th and 8th pin of interface switching chip U6, and the 47th, 48th, 50th and 51st pin of collection line control chip U13 are connected with the 14th, 15th, 18th and 19th pin of network mouth conversion chip U15, and the 2nd, 3rd, 4th, 5th, 6th, 7th, 8th, 9th, 10th and 11th pin of network mouth conversion chip U15 are connected with the 12th, 11th, 9th, 8th, 6th, 5th, 3rd and 2nd pin of network mouth transformer chip U16, and the 13th, 14th, 16th, 17th, 19th, 20th, 22nd and 23rd pin of network mouth transformer chip U16 are connected with the gigabit network mouth.

[0011] The utility model discloses further improve, and the expansion input and output circuit still includes USB2 interface circuit, audio interface circuit, is provided with USB2 collection hub chip on USB2 interface circuit, is provided with 28 pins on USB2 collection hub chip, and the 16th and 17th contact of connection interface are connected with the 36th and 37th pin of collection line control chip U13, and the 64th and 63rd pin of collection line control chip U13 are connected with the 1st and 2nd pin of USB2 collection hub chip, and the 6th and 7th pin of USB2 collection hub chip is connected to a USB2 interface, and the 3rd and 4th pin of USB2 collection hub chip is connected to another USB2 interface, and the 12th and 13th pin of USB2 collection hub chip is connected to the input end of audio interface circuit, and the output end of audio interface circuit is connected with audio interface.

[0012] The utility model discloses further improve, and is provided with audio signal conversion chip U26 on audio interface circuit, and is provided with 49 pins on audio signal conversion chip U26, and the 8th and 9th pin of audio signal conversion chip U26 are connected with the 12th and 13th pin of USB2 collection hub chip, and the 19th and 20th pin of audio signal conversion chip U26 are connected with microphone interface, and the 31st and 32nd pin of audio signal conversion chip U26 are connected with earphone interface.

[0013] The utility model discloses further improve, and the 1st, 2nd, 4th, 5th, 6th and 7th pin of collection line control chip U13 are connected with a USB1 interface, and the 9th, 10th, 11th, 12th, 14th and 15th pin of collection line control chip U13 are connected with another USB1 interface.

[0014] The utility model relates a system, including tablet computer and expansion base, be provided with base control panel in expansion base, be provided with the circuit of TYPEC expansion application based on POGO thimble in base control panel, be provided with upper POGO thimble on tablet computer, be provided with lower POGO thimble with upper POGO thimble cooperation on interface circuit, be provided with gold plating layer on upper POGO thimble and lower POGO thimble.

[0015] Compared with the prior art, the utility model has the advantages that: the utility model provides a circuit and system for TYPEC expansion application based on POGO thimble, which effectively solves the problem of limited number of interfaces of tablet computers in the prior art and cannot be expanded to meet the rich functional requirements of users, and through the application of the circuit, the interface circuit can lead out the signals of the tablet computer and branch, and through the cooperation of the data control circuit and the expansion input and output circuit, the branched signals can be expanded into interfaces with different functions, effectively improving the user experience, and through the power supply adjustment circuit, automatic voltage lifting can be realized for power supply, meeting the use requirements of different functional expansion of users and improving the competitiveness of products. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the scheme of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0017] Figure 1 It is the principle block diagram of the circuit for TYPEC expansion application based on POGO thimble;

[0018] Figure 2 It is the circuit diagram of interface circuit;

[0019] Figure 3 It is the circuit diagram of power supply adjustment circuit;

[0020] Figure 4 It is the circuit diagram of power supply adjustment circuit;

[0021] Figure 5 It is the circuit diagram of power supply adjustment circuit;

[0022] Figure 6 It is the circuit diagram of data control circuit;

[0023] Figure 7 It is the circuit diagram of HDMI interface circuit;

[0024] Figure 8 It is the circuit diagram of network port expansion circuit;

[0025] Figure 9 The circuit diagram of the network port expansion circuit;

[0026] Figure 10 The circuit diagram of the network port expansion circuit;

[0027] Figure 11 The circuit diagram of the USB2 interface circuit;

[0028] Figure 12 The circuit diagram of the audio interface circuit;

[0029] Figure 13 The circuit diagram of the audio interface circuit;

[0030] Figure 14 The circuit diagram of the audio interface circuit. DETAILED DESCRIPTION

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting upon the application; the description and the drawings are to be regarded as illustrative in nature and are not intended to be limiting upon the application; the terms "comprising," "comprise," "including," "include," "contain," "contains," "have" or "has," and any variations thereof in the claims and the specification are meant to encompass the items listed thereafter and equivalents thereof as well as additional items. The terms "first," "second," and the like in the description and in the claims, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of use in either order.

[0032] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily all directed to the same embodiments. It is expressly understood that any of the embodiments of the application described herein are combinable with each other.

[0033] In order to make the technical personnel in the technical field better understand the application scheme, the technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings.

[0034] As shown in Figures 1-14 The application discloses a system, which comprises a tablet computer and an expansion base, the expansion base is provided with a base control panel, and the base control panel is provided with a circuit for realizing TYPEC expansion application based on a POGO pin.

[0035] The circuit for realizing TYPEC expansion application based on POGO pin includes a power supply, an interface circuit, a power supply adjusting circuit, a data control circuit and an expansion input and output circuit.

[0036] The tablet computer is provided with an upper POGO pin, and the interface circuit is provided with a lower POGO pin matched with the upper POGO pin.

[0037] The upper POGO pin and the lower POGO pin are further thickened by the gold plating layer, so that higher transmission rate is realized.

[0038] The output end of the power supply is connected with the input end of the power supply adjusting circuit, the output end of the interface circuit is connected with the input end of the power supply adjusting circuit and the input end of the data control circuit respectively, the output end of the power supply adjusting circuit is connected with the power supply module of the tablet computer and the input end of the expansion input and output circuit respectively, the data control circuit is connected with the input end of the expansion input and output circuit, and the output end of the expansion input and output circuit is connected with the expansion interface.

[0039] The signal of the interface circuit is amplified and expanded into the expansion input and output circuit by the data control circuit, so that the single interface of the tablet computer is expanded into multiple interfaces for use, and the user experience is improved.

[0040] The interface circuit is provided with a connection interface, 27 contacts are arranged in the connection interface, the 1st, 2nd, 4th, 5th, 7th, 8th, 10th and 11th contacts of the connection interface are connected with the input end of the data control circuit, and the 19th and 20th contacts of the connection interface are connected with the input end of the power supply adjusting circuit.

[0041] The various interface contacts of the tablet computer are extended by the interface circuit, so that various signals are conveniently extended and connected with the circuit in the base control board.

[0042] The 1st, 2nd, 4th, 5th, 7th, 8th, 10th and 11th contacts of the connection interface are connected with the data transmission and data receiving lines in the original Type-C interface of the tablet computer, and the data input and output lines are led out.

[0043] The 19th and 20th contacts of the connection interface are connected with the power supply lines in the original Type-C interface of the tablet computer, and the power supply lines are led out.

[0044] The power supply adjusting circuit comprises a charging chip U4, a resistor R15, a field effect transistor Q1, a resistor R11, a resistor R17, a field effect transistor Q2, a resistor R12, a power management chip U1, an inductor L1, a fuse R11705 and an expansion module power management chip U2, the charging chip U4 is provided with 40 pins, the power management chip U1 is provided with 33 pins, the expansion module power management chip U2 is provided with 32 pins, the 18th and 20th pins of the charging chip U4 are connected with the 19th and 20th contacts of the connecting interface, the 31st pin of the charging chip U4 is connected with the gate of the field effect transistor Q1 through the resistor R15, the drain of the field effect transistor Q1 is connected with the 12th pin of the power management chip U1 through the resistor R11, the 32nd pin of the charging chip U4 is connected with the gate of the field effect transistor Q2 through the resistor R17, the drain of the field effect transistor Q2 is connected with the 12th pin of the power management chip U1 through the resistor R12, the 15th, 16th, 20th, 21st, 22nd, 23rd and 34th pins of the power management chip U1 are connected with the input end of the fuse R11705 through the inductor L1, the output end of the fuse R11705 is connected with the power supply module of the tablet computer and the 1st, 2nd, 3rd, 4th, 5th and 32nd pins of the expansion module power management chip U2 respectively, and the 20th, 21st, 22nd, 23rd, 24th and 25th pins of the expansion module power management chip U2 are connected with the expansion input and output circuit.

[0045] The chip model of the charging chip U4 is FL7102, which is mainly used for sending a boost or buck signal to the power management chip U1.

[0046] The 31st pin and the 32nd pin of the charging chip U4 are mainly used for controlling the power management chip U1 and sending a buck or boost signal.

[0047] The chip model of the power management chip U1 is SC8112, which is a DC chip used for power supply, and the 15th, 16th, 20th, 21st, 22nd, 23rd and 34th pins of the power management chip U1 are mainly used for outputting a voltage for power supply and supplying power to the tablet computer and the expansion interface respectively.

[0048] The chip model of the expansion module power management chip U2 is SY9329C, which is mainly used for power supply management of the expansion interface, and the 20th, 21st, 22nd, 23rd, 24th and 25th pins of the expansion module power management chip U2 are used for outputting a 5V voltage to multiple expansion interfaces for power supply.

[0049] Through the setting of the data control circuit, the power supply voltage of the expansion base can be effectively boosted to 20V to charge the tablet computer, and the power supply voltage of the expansion input and output circuit can be bucked to 5V to supply power, so that the circuit can be used as a DC power supply and realize PD boost and buck power supply.

[0050] The interface switching chip U6 is provided on the data control circuit, the interface switching chip U6 is provided with 41 pins, the expansion input and output circuit includes an HDMI interface circuit and a network port expansion circuit, the 9th, 10th, 12th, 13th, 15th, 16th, 18th and 19th pins of the interface switching chip U6 are connected with the 1st, 2nd, 4th, 5th, 7th, 8th, 10th and 11th contacts of the connection interface, the 40th, 39th, 37th, 36th, 34th, 33rd, 31st and 30th pins of the interface switching chip U6 are connected with the input end of the HDMI interface circuit, the output end of the HDMI interface circuit is connected with the HDMI interface, the 4th, 5th, 7th and 8th pins of the interface switching chip U6 are connected with the input end of the network port expansion circuit, and the output end of the network port expansion circuit is connected with the gigabit network port.

[0051] The chip signal of the interface switching chip U6 is PS8742B, mainly used for amplifying and processing the received signals and expanding the signals to different functional interfaces, the 40th, 39th, 37th, 36th, 34th, 33rd, 31st and 30th pins of the interface switching chip U6 are used for establishing communication with the HDMI interface circuit, and the 4th, 5th, 7th and 8th pins of the interface switching chip U6 are used for establishing communication with the network port expansion circuit.

[0052] The interface switching chip U6 is provided to realize expansion of different types of interfaces and improve the flexibility and expansion capacity of the expansion base.

[0053] The HDMI interface circuit includes an HDMI signal conversion chip U5, the HDMI signal conversion chip U5 is provided with 49 pins, the 38th, 39th, 41st, 42nd, 44th, 45th, 47th and 48th pins of the HDMI signal conversion chip U5 are connected with the 40th, 39th, 37th, 36th, 34th, 33rd, 31st and 30th pins of the interface switching chip U6, and the 23rd, 22nd, 20th, 19th, 17th, 16th, 14th and 13th pins of the HDMI signal conversion chip U5 are connected with the HDMI interface.

[0054] The model of the HDMI signal conversion chip U5 is LT8711, and the 23rd, 22nd, 20th, 19th, 17th, 16th, 14th and 13th pins of the HDMI signal conversion chip U5 establish communication with the HDMI interface.

[0055] The HDMI interface circuit can expand the interface of the tablet computer into an HDMI interface and realize 1080p data input and output.

[0056] The network port expansion circuit comprises a hub control chip U13, a network port conversion chip U15 and a network port transformer chip U16, the hub control chip U13 is provided with 64 pins, the network port conversion chip U15 is provided with 49 pins, and the network port transformer chip U16 is provided with 24 pins, the 42nd, 41st, 39th and 38th pins of the hub control chip U13 are connected with the 4th, 5th, 7th and 8th pins of the interface switching chip U6, the 47th, 48th, 50th and 51st pins of the hub control chip U13 are connected with the 14th, 15th, 18th and 19th pins of the network port conversion chip U15, the 2nd, 3rd, 4th, 5th, 6th, 7th, 8th, 9th, 10th and 11th pins of the network port conversion chip U15 are connected with the 12th, 11th, 9th, 8th, 6th, 5th, 3rd and 2nd pins of the network port transformer chip U16, and the 13th, 14th, 16th, 17th, 19th, 20th, 22nd and 23rd pins of the network port transformer chip U16 are connected with a gigabit network port.

[0057] The chip model of the hub control chip U13 is GL3510, which is mainly used for converting a data signal into a USB3.0 signal and expanding multiple USB3.0 outputs, and the 47th, 48th, 50th and 51st pins of the hub control chip U13 are used for establishing communication with the network port conversion chip U15.

[0058] The chip model of the network port conversion chip U15 is RTL8153, which is mainly used for converting a USB3.0 signal and a network port signal, and the 2nd, 3rd, 4th, 5th, 6th, 7th, 8th, 9th, 10th and 11th pins of the network port conversion chip U15 are used for establishing communication with the network port transformer chip U16.

[0059] The chip model of the network port transformer chip U16 is GST5009, which is mainly used for preventing external signal interference, isolation and improving the stability of the gigabit network port signal.

[0060] Through the setting of the network port expansion circuit, the interface signal of the tablet computer can be expanded into a gigabit network port, and the flexibility of use of the user is improved.

[0061] The expansion input and output circuit further comprises a USB2 interface circuit and an audio interface circuit, the USB2 hub chip is arranged on the USB2 interface circuit, the USB2 hub chip is provided with 28 pins, the 16th and 17th contacts of the connection interface are connected with the 36th and 37th pins of the hub control chip U13, the 64th and 63rd pins of the hub control chip U13 are connected with the 1st and 2nd pins of the USB2 hub chip, the 6th and 7th pins of the USB2 hub chip are connected to a USB2 interface, the 3rd and 4th pins of the USB2 hub chip are connected to another USB2 interface, the 12th and 13th pins of the USB2 hub chip are connected to the input end of the audio interface circuit, and the output end of the audio interface circuit is connected with an audio interface.

[0062] The chip model of the USB2 hub chip is GL850G, which is mainly used for converting data signals into USB2.0 and expanding into multiple interfaces of various types for access. The 3rd, 4th, 6th and 7th pins of the USB2 hub chip are mainly used for establishing communication with the USB2 interface. The 12th and 13th pins of the USB2 hub chip are mainly used for establishing communication with the audio interface circuit.

[0063] By expanding the input and output circuit, the interface of the tablet computer can be expanded into a USB2.0 and an audio interface, improving the user experience.

[0064] The audio signal conversion chip U26 is arranged on the audio interface circuit. The audio signal conversion chip U26 is provided with 49 pins. The 8th and 9th pins of the audio signal conversion chip U26 are connected with the 12th and 13th pins of the USB2 hub chip. The 19th and 20th pins of the audio signal conversion chip U26 are connected with the microphone interface. The microphone circuit CON2 is arranged on the microphone interface. The 31st and 32nd pins of the audio signal conversion chip U26 are connected with the earphone interface. The earphone circuit CON1 is arranged on the earphone interface.

[0065] The chip model of the audio signal conversion chip U26 is ALC4050, which is mainly used for converting the accessed audio signals into USB signals for use with the tablet computer. The 19th and 20th pins of the audio signal conversion chip U26 are mainly used for connecting with the microphone interface to realize the access and use of the microphone. The 31st and 32nd pins of the audio signal conversion chip U26 are mainly used for establishing connection with the earphone interface.

[0066] By arranging the audio interface circuit, the earphone receiver and the microphone can be accessed and used with the tablet computer, improving the user experience.

[0067] The 1st, 2nd, 4th, 5th, 6th and 7th pins of the hub control chip U13 are connected with one USB1 interface. The 9th, 10th, 11th, 12th, 14th and 15th pins of the hub control chip U13 are connected with another USB1 interface.

[0068] The chip model of the hub control chip U13 is GL3510, which is mainly used for realizing the expansion of USB3.0 and improving the user experience. The 1st, 2nd, 4th, 5th, 6th and 7th pins of the hub control chip U13 are used for communicating with one of the USB3.0 interfaces. The 9th, 10th, 11th, 12th, 14th and 15th pins of the hub control chip U13 are used for communicating with the other USB3.0 interface.

[0069] From above, the beneficial effect of the utility model is: adopt its mechanism, can effectively solve the problem that the number of tablet computer interface is limited in prior art, cannot expand to meet the user's rich function demand, through the application of the circuit, the interface circuit can lead out the signal of the tablet computer and branch, and the branched signal is expanded into different function interfaces through the cooperation of the data control circuit and the expansion input and output circuit, which effectively improves the user's experience, and the power supply adjusting circuit can realize automatic voltage lifting for power supply, can meet the use demand of different function expansion of the user, and is favorable for improving the competitiveness of products.

[0070] The above-described specific embodiments are preferred embodiments of the utility model, and do not limit the specific implementation range of the utility model, and the range of the utility model includes but is not limited to the specific embodiments, and equivalent changes made according to the utility model are within the protection range of the utility model.

Claims

1. A circuit for implementing TYPEC expansion applications based on a POGO pin, characterized in that: The interface circuit is provided with a connection interface, 27 contacts are arranged in the connection interface, the 1st, 2nd, 4th, 5th, 7th, 8th, 10th and 11th contacts of the connection interface are connected with the input end of the data control circuit, and the 19th and 20th contacts of the connection interface are connected with the input end of the power supply adjustment circuit. 2.The circuit for realizing TYPEC extended application based on a POGO pin according to claim 1, wherein: The power supply adjustment circuit comprises a charging chip U4, a resistor R15, a field effect tube Q1, a resistor R11, a resistor R17, a field effect tube Q2, a resistor R12, a power management chip U1, an inductor L1, a fuse R11705 and an expansion module power management chip U2, 40 pins are arranged on the charging chip U4, the power management chip U1 is provided with 33 pins, the expansion module power management chip U2 is provided with 32 pins, the 18th and 20th pins of the charging chip U4 are connected with the 19th and 20th contacts of the connection interface, the 31st pin of the charging chip U4 is connected with the gate of the field effect tube Q1 through the resistor R15, the drain of the field effect tube Q1 is connected with the 12th pin of the power management chip U1 through the resistor R11, the 32nd pin of the charging chip U4 is connected with the gate of the field effect tube Q2 through the resistor R17, the drain of the field effect tube Q2 is connected with the 12th pin of the power management chip U1 through the resistor R12, the 15th, 16th, 20th, 21st, 22nd, 23rd and 34th pins of the power management chip U1 are connected with the input end of the fuse R11705 through the inductor L1, the output end of the fuse R11705 is connected with the power supply module of the tablet computer and the 1st, 2nd, 3rd, 4th, 5th and 32nd pins of the expansion module power management chip U2 respectively, and the 20th, 21st, 22nd, 23rd, 24th and 25th pins of the expansion module power management chip U2 are connected with the expansion input and output circuit. 3.The circuit for realizing TYPEC extended application based on a POGO pin according to claim 2, characterized in that: ​ 4.The circuit for realizing TYPEC extended application based on a POGO pin according to claim 3, characterized in that: The interface switching chip U6 is provided on the data control circuit, 41 pins are provided on the interface switching chip U6, the expansion input and output circuit comprises an HDMI interface circuit and a network port expansion circuit, the 9th, 10th, 12th, 13th, 15th, 16th, 18th and 19th pins of the interface switching chip U6 are connected with the 1st, 2nd, 4th, 5th, 7th, 8th, 10th and 11th contacts of the connection interface, the 40th, 39th, 37th, 36th, 34th, 33rd, 31st and 30th pins of the interface switching chip U6 are connected with the input end of the HDMI interface circuit, the output end of the HDMI interface circuit is connected with the HDMI interface, the 4th, 5th, 7th and 8th pins of the interface switching chip U6 are connected with the input end of the network port expansion circuit, and the output end of the network port expansion circuit is connected with the gigabit network port. 5.The circuit for realizing TYPEC extended application based on a POGO pin according to claim 4, wherein: The HDMI interface circuit comprises an HDMI signal conversion chip U5, 49 pins are provided on the HDMI signal conversion chip U5, the 38th, 39th, 41st, 42nd, 44th, 45th, 47th and 48th pins of the HDMI signal conversion chip U5 are connected with the 40th, 39th, 37th, 36th, 34th, 33rd, 31st and 30th pins of the interface switching chip U6, and the 23rd, 22nd, 20th, 19th, 17th, 16th, 14th and 13th pins of the HDMI signal conversion chip U5 are connected with the HDMI interface. 6.The circuit for realizing TYPEC extended application based on a POGO pin according to claim 5, characterized in that: The network port expansion circuit comprises a hub control chip U13, a network port conversion chip U15 and a network port transformer chip U16, 64 pins are provided on the hub control chip U13, 49 pins are provided on the network port conversion chip U15, and 24 pins are provided on the network port transformer chip U16, the 42nd, 41st, 39th and 38th pins of the hub control chip U13 are connected with the 4th, 5th, 7th and 8th pins of the interface switching chip U6, the 47th, 48th, 50th and 51st pins of the hub control chip U13 are connected with the 14th, 15th, 18th and 19th pins of the network port conversion chip U15, the 2nd, 3rd, 4th, 5th, 6th, 7th, 8th, 9th, 10th and 11th pins of the network port conversion chip U15 are connected with the 12th, 11th, 9th, 8th, 6th, 5th, 3rd and 2nd pins of the network port transformer chip U16, and the 13th, 14th, 16th, 17th, 19th, 20th, 22nd and 23rd pins of the network port transformer chip U16 are connected with the gigabit network port. 7.The circuit for realizing TYPEC extended application based on a POGO pin according to claim 6, characterized in that: The expansion input and output circuit further comprises a USB2 interface circuit and an audio interface circuit, a USB2 hub chip is arranged on the USB2 interface circuit, 28 pins are arranged on the USB2 hub chip, the 16th and 17th contacts of the connection interface are connected with the 36th and 37th pins of the hub control chip U13, the 64th and 63rd pins of the hub control chip U13 are connected with the 1st and 2nd pins of the USB2 hub chip, the 6th and 7th pins of the USB2 hub chip are connected to a USB2 interface, the 3rd and 4th pins of the USB2 hub chip are connected to another USB2 interface, the 12th and 13th pins of the USB2 hub chip are connected to the input end of the audio interface circuit, and the output end of the audio interface circuit is connected with an audio interface. 8.The circuit for realizing TYPEC extended application based on a POGO pin according to claim 7, wherein: An audio signal conversion chip U26 is arranged on the audio interface circuit, 49 pins are arranged on the audio signal conversion chip U26, the 8th and 9th pins of the audio signal conversion chip U26 are connected with the 12th and 13th pins of the USB2 hub chip, the 19th and 20th pins of the audio signal conversion chip U26 are connected with a microphone interface, and the 31st and 32nd pins of the audio signal conversion chip U26 are connected with an earphone interface. 9.The circuit for realizing TYPEC extended application based on a POGO pin according to claim 8, characterized in that: The 1st, 2nd, 4th, 5th, 6th and 7th pins of the hub control chip U13 are connected with a USB1 interface, and the 9th, 10th, 11th, 12th, 14th and 15th pins of the hub control chip U13 are connected with another USB1 interface.

10. A system characterized by: The expansion base is provided with a base control panel, the base control panel is provided with the circuit for expanding TYPEC application based on POGO pin according to any one of claims 1-9, the tablet computer is provided with an upper POGO pin, the interface circuit is provided with a lower POGO pin matched with the upper POGO pin, and the upper POGO pin and the lower POGO pin are provided with a gold plating layer.

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