Universal serial bus (USB) super fast-charging charger capable of freely setting output voltage and current and circuit

Abstract

The invention discloses a USB super fast charger capable of freely setting output voltage and current and a circuit, the USB super fast charger comprises a charger body, an LCD display screen is fixedly installed on one side of the front surface of the charger body, a plurality of USB interfaces are arranged on the other side of the front surface of the charger body, and keys are fixedly installed in the middle of the front surface of the charger body. Through the innovative digital analog electric control technology, the mobile phone charger can independently set the output voltage and current and output the output voltage and current through the USB port, the functions of super fast charging and an adjustable power supply are integrated, the mobile phone charger can be used in a wider range, the functions of multiple devices can be achieved through one charger, and the mobile phone charger is convenient to use. A mobile phone charger, a numerical control adjustable power supply and a voltage and current power meter save cost and working space for users; the problem that the output voltage and current of an existing mobile phone charger cannot be set autonomously is solved, one charger integrates the mobile phone fast charging function and the adjustable power supply function, and the use range of the mobile phone charger is expanded.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of mobile phone chargers, in particular to a USB super-fast charging charger with freely settable output voltage and current and a circuit. BACKGROUND

[0002] The existing mobile phone charger is usually a device capable of charging only a mobile phone or a USB interface, the interface is by default 5V output, and the output voltage can be output only after handshake agreement between the power-consuming device and the charger. That is, after AC-to-DC conversion by a power board, the required voltage is output by a DC-to-DC part of a fast charging chip according to the agreement control.

[0003] However, the conventional mobile phone charger has the following disadvantages:

[0004] The existing mobile phone charger cannot control the output when used, and the technology used by the existing mobile phone charger is usually a BUCK circuit, which cannot meet the charging demand of people. Specifically, the existing mobile phone charger is usually a device capable of charging only a mobile phone or a USB interface, the use range is limited, and the output voltage can be output only after handshake agreement between the power-consuming device and the charger. The user cannot control and set the output voltage and current. SUMMARY

[0005] The application aims to provide a USB super-fast charging charger with freely settable output voltage and current, so as to solve the problems that the existing mobile phone charger cannot control the output when used, the technology used by the existing mobile phone charger is usually a BUCK circuit, which cannot meet the charging demand of people, and specifically, the existing mobile phone charger is usually a device capable of charging only a mobile phone or a USB interface, the use range is limited, and the output voltage can be output only after handshake agreement between the power-consuming device and the charger. The user cannot control and set the output voltage and current.

[0006] To achieve the above-mentioned purpose, the application provides the following technical scheme: a USB super-fast charging charger with freely settable output voltage and current, comprising a charger body, a LCD display screen is fixedly installed on one side of the front face of the charger body, a plurality of USB interfaces are formed on the other side of the front face of the charger body, a key is fixedly installed on the middle part of the front face of the charger body, a power board is fixedly installed on one side of the bottom end of the inner wall of the charger body, a protocol chip is fixedly installed on one side of the power board, a plurality of BUCK circuits are fixedly installed on the other side of the bottom end of the inner wall of the charger body, and an MCU is fixedly installed in the charger body.

[0007] As a preferred technical scheme of the present application, the BUCK circuits are electrically connected with the USB interfaces, the keys, the LCD display screen and the protocol chip are electrically connected with the MCU, the top end of the back of the charger body is provided with the heat dissipation openings, the bottom end of the back of the charger body is provided with the power supply opening, and the LCD display screen, the MCU, the protocol chip, the power supply opening and the BUCK circuits are electrically connected with the power board.

[0008] The application discloses a circuit of a USB super-fast charger capable of freely setting output voltage and current, which comprises a first chip circuit, a second chip circuit, a third chip circuit, a fourth chip circuit, an MCU circuit, an LCD circuit, a wireless charging circuit and a key circuit, characterized in that the first chip circuit comprises a capacitor C4, a capacitor C15, a resistor R41, a resistor R44, a resistor R45, a protocol chip U8, a capacitor C30, a capacitor C31, a capacitor C40, a capacitor C43, a capacitor C34, a transistor Q6, a transistor Q3, an inductor L1, a capacitor C37, a capacitor C38, a capacitor C21, a capacitor C29, a patch capacitor EC1, a patch capacitor EC2, a resistor R47, a resistor R54, a transistor Q5, a capacitor C39, a capacitor C44, a USB connector USB6 and a USB connector U11; the second chip circuit comprises a protocol chip U1, a resistor R16, a resistor R6, a resistor R4, a resistor R3, a capacitor C1, a capacitor C2, a capacitor C7, a capacitor C8, a capacitor C13, a capacitor C14, a capacitor C9, a transistor Q1, a transistor Q7, an inductor L2, a capacitor C3, a capacitor C6, a patch capacitor EC3, a capacitor C10, a capacitor C11, a patch capacitor EC4, a resistor R7, a resistor R9, a transistor Q2, a capacitor C12, a capacitor C16, a USB connector USB10 and a USB connector U2; the third chip circuit comprises a protocol chip U4, a capacitor C17, a capacitor C20, a resistor R10, a resistor R11, a resistor R12, a capacitor C50, a capacitor C51, a capacitor C46, a transistor Q8, an inductor L3, a transistor Q10, a capacitor C22, a capacitor C45, a patch capacitor EC5, a resistor R13, a resistor R14, a capacitor C47, a capacitor C48, a patch capacitor EC6, a transistor Q9, a USB connector USB1, a USB connector USB2, a capacitor C49 and a capacitor C52; the fourth chip circuit comprises a protocol chip U9, a capacitor C53, a capacitor C54, a resistor R15, a resistor R17, a resistor R18, a capacitor C61, a capacitor C62, a capacitor C57, a transistor Q11, an inductor L4, a transistor Q13, a capacitor C55, a capacitor C56, a patch capacitor EC7, a resistor R20, a resistor R21, a capacitor C58, a capacitor C59, a patch capacitor EC8, a transistor Q12, a USB connector USB5, a USB connector USB9, a capacitor C60 and a capacitor C63; the MUC circuit comprises an MCU chip, a resistor R28, a capacitor C24, a capacitor C5, a capacitor C32, a resistor R34, a resistor R33, a resistor R25, a resistor R26, a resistor R27 and a resistor R29; the LCD circuit comprises an integrated circuit P13, a resistor R51, a resistor R49, a resistor R52, a capacitor C41, a capacitor C42 and a transistor Q4; the wireless charging circuit is internally provided with an integrated circuit P3; and the key circuit is internally provided with a capacitor C33 and a switch SW1.

[0009] As a preferred technical solution of the present application, the 3th pin of the integrated circuit P3 is grounded, and the 4th pin of the integrated circuit P3 is grounded.

[0010] As a preferred technical solution of the present application, the 16th pin of the integrated circuit P13 is connected with one end of the resistor R51 and one end of the resistor R52 and grounded, the other end of the resistor R51 is connected with the B pin of the triode Q4 and one end of the resistor R49, the E pin of the triode Q4 is connected with the other end of the resistor R52, the 3th pin of the integrated circuit P13 is connected with the C pin of the triode Q4, the 11th pin of the integrated circuit P13 is connected with one end of the capacitor C41 and one end of the capacitor C42, the other end of the capacitor C41, the other end of the capacitor C42 and the 2th pin of the integrated circuit P13 are grounded.

[0011] As a preferred technical solution of the present application, the 12th pin of the MCU chip is connected with one end of the resistor R28, the 24th pin of the MCU chip is connected with one end of the capacitor C24, the 48th pin of the MCU chip is connected with one end of the capacitor C5, the 9th pin of the MCU chip is connected with one end of the capacitor C32, the 44th pin of the MCU chip is connected with one end of the resistor R33, the 7th pin of the MCU chip is connected with one end of the resistor R34, the 41th pin of the MCU chip is connected with one end of the resistor R25, the 42th pin of the MCU chip is connected with one end of the resistor R26, the 43th pin of the MCU chip is connected with one end of the resistor R27, the 27th pin of the MCU chip is connected with one end of the resistor R29, the other end of the capacitor C24, the other end of the capacitor C5, the other end of the capacitor C32, the other end of the resistor R33, the 23th pin of the MCU chip, the 47th pin of the MCU chip and the 8th pin of the MCU chip are grounded, and the other end of the resistor R34 is connected with the power supply 3.3V outputted by the 5th pin of the LDO chip U3.

[0012] As a preferred technical scheme of the present application, one end of the capacitor C53 and one end of the capacitor C54 are connected to the 25 pin of the protocol chip U9, the other end of the capacitor C54 is connected to one end of the resistor R15, one end of the resistor R18 is connected to the 24 pin of the protocol chip U9, the other end of the resistor R18 is connected to one end of the resistor R17, one end of the capacitor C61 is connected to the 12 pin of the protocol chip U9, one end of the capacitor C62 is connected to the 14 pin of the protocol chip U9, one end of the capacitor C57 is connected to the 15 pin of the protocol chip U9, the other end of the capacitor C57, one end of the transistor Q11, one end of the inductor L4 and one end of the transistor Q13 are connected to the 18 pin of the protocol chip U9, one end of the capacitor C55, one end of the capacitor C56 and one end of the patch capacitor EC7 are connected to the 8 pin of the transistor Q11, one end of the resistor R20, one end of the resistor R21, one end of the capacitor C58, one end of the capacitor C59 and one end of the patch capacitor EC8 are connected to the other end of the inductor L4, the other end of the resistor R20 is connected to the 5 pin and the 6 pin of the transistor Q12, the other end of the resistor R21 is connected to the 7 pin and the 8 pin of the transistor Q12, one end of the capacitor C63 and the 1 pin of the USB connector USB9 are connected to the 3 pin of the transistor Q12, one end of the capacitor C60 and the 1 pin of the USB connector USB5 are connected to the 1 pin of the transistor Q12, the 29 pin of the protocol chip U9, the 26 pin of the protocol chip U9, the other end of the resistor R15, the other end of the capacitor C53, the other end of the resistor R17, the other end of the capacitor C61, the other end of the capacitor C62, the 13 pin of the protocol chip U9, the 1 pin of the transistor Q13, the 2 pin of the transistor Q13, the 3 pin of the transistor Q13, the other end of the capacitor C55, the other end of the capacitor C56, the other end of the patch capacitor EC7, the other end of the capacitor C58, the other end of the capacitor C59, the other end of the patch capacitor EC8, the other end of the capacitor C60, the other end of the capacitor C63, the 4 pin of the USB connector USB5 and the 4 pin of the USB connector USB9 are grounded.

[0013] As a preferred technical scheme of the present application, one end of the capacitor C17 and one end of the capacitor C20 are connected to the 25th pin of the protocol chip U4, the other end of the capacitor C20 is connected to one end of the resistor R10, the 24th pin of the protocol chip U4 is connected to one end of the resistor R12, the other end of the resistor R12 is connected to one end of the resistor R11, the 12th pin of the protocol chip U4 is connected to one end of the capacitor C50, the 14th pin of the protocol chip U4 is connected to one end of the capacitor C51, the 15th pin of the protocol chip U4 is connected to one end of the capacitor C46, the 18th pin of the protocol chip U4 is connected to the other end of the capacitor C46, one end of the transistor Q8, one end of the inductor L3 and one end of the transistor Q10 respectively, the 8th pin of the transistor Q8 is connected to one end of the capacitor C22, one end of the capacitor C45 and one end of the patch capacitor EC5 respectively, the other end of the inductor L3 is connected to one end of the resistor R13, one end of the resistor R14, one end of the capacitor C47, one end of the capacitor C48 and one end of the patch capacitor EC6 respectively, the other end of the resistor R13 is connected to the 5th pin of the transistor Q9 and the 6th pin of the transistor Q9 respectively, the other end of the resistor R14 is connected to the 7th pin of the transistor Q9 and the 8th pin of the transistor Q9 respectively, the 3rd pin of the transistor Q9 is connected to one end of the capacitor C52 and the 1st pin of the USB connector USB2 respectively, the 1st pin of the transistor Q9 is connected to one end of the capacitor C49 and the 1st pin of the USB connector USB1 respectively, the 29th pin of the protocol chip U4, the 26th pin of the protocol chip U4, the other end of the resistor R10, the other end of the capacitor C17, the other end of the resistor R11, the other end of the capacitor C50, the other end of the capacitor C51, the 13th pin of the protocol chip U4, the 1st pin of the transistor Q10, the 2nd pin of the transistor Q10, the 3rd pin of the transistor Q10, the other end of the capacitor C22, the other end of the capacitor C45, the other end of the patch capacitor EC5, the other end of the capacitor C47, the other end of the capacitor C48, the other end of the patch capacitor EC6, the other end of the capacitor C49, the other end of the capacitor C52, the 4th pin of the USB connector USB1 and the 4th pin of the USB connector USB2 are grounded.

[0014] As a preferred technical scheme of the present application, one end of the resistor R16 is connected to the 26th pin of the protocol chip U1, one end of the capacitor C1 and one end of the capacitor C2 are respectively connected to the 25th pin of the protocol chip U1, the other end of the capacitor C2 is connected to one end of the resistor R3, one end of the resistor R6 is connected to the 24th pin of the protocol chip U1, the other end of the resistor R6 is connected to one end of the resistor R4, one end of the capacitor C7 is connected to the 1st pin of the protocol chip U1, one end of the capacitor C8 is connected to the 2nd pin of the protocol chip U1, one end of the capacitor C13 is connected to the 12th pin of the protocol chip U1, one end of the capacitor C14 is connected to the 14th pin of the protocol chip U1, one end of the capacitor C9 is connected to the 15th pin of the protocol chip U1, the 18th pin of the protocol chip U1 and the other end of the capacitor C9 are respectively connected to one end of the transistor Q1, one end of the transistor Q7 and one end of the inductor L2, the 8th pin of the transistor Q1 is respectively connected to one end of the capacitor C3, one end of the capacitor C6 and one end of the patch capacitor EC3, the other end of the inductor L2 is respectively connected to the resistor R7, one end of the resistor R9, one end of the capacitor C10, one end of the capacitor C11 and one end of the patch capacitor EC4, the other end of the resistor R7 is respectively connected to the 5th pin of the transistor Q2 and the 6th pin of the transistor Q2, the other end of the resistor R9 is respectively connected to the 7th pin of the transistor Q2 and the 8th pin of the transistor Q2, one end of the capacitor C12 is connected to the 3rd pin of the transistor Q2, one end of the capacitor C16 and the 1st pin of the USB connector USB10 are respectively connected to the 1st pin of the transistor Q2, the 29th pin of the protocol chip U1, the other end of the capacitor C1, the other end of the resistor R3, the other end of the resistor R4, the other end of the capacitor C7, the other end of the capacitor C8, the other end of the capacitor C13, the other end of the capacitor C14, the 13th pin of the protocol chip U1, the other end of the capacitor C3, the other end of the capacitor C6, the other end of the patch capacitor EC3, the 1st pin of the transistor Q7, the 2nd pin of the transistor Q7, the 3rd pin of the transistor Q7, the other end of the capacitor C10, the other end of the capacitor C11, the other end of the patch capacitor EC4, the other end of the capacitor C12, the other end of the capacitor C16 and the 5th pin and the 6th pin of the USB connector USB10 are grounded.

[0015] As a preferred technical scheme of the present application, one end of the capacitor C30 is connected to the 1 pin of the protocol chip U8, one end of the capacitor C31 is connected to the 2 pin of the protocol chip U8, one end of the capacitor C4 and one end of the capacitor C15 are respectively connected to the 25 pin of the protocol chip U8, one end of the resistor R41 is connected to the other end of the capacitor C15, one end of the resistor R45 is connected to the 24 pin of the protocol chip U8, one end of the resistor R44 is connected to the other end of the resistor R45, one end of the capacitor C40 is connected to the 12 pin of the protocol chip U8, one end of the capacitor C43 is connected to the 14 pin of the protocol chip U8, one end of the capacitor C34 is connected to the 15 pin of the protocol chip U8, one end of the transistor Q6 is connected to the 18 pin of the protocol chip U8 and the other end of the capacitor C34, one end of the transistor Q3 is connected to the 19 pin of the protocol chip U8, the 1 pin of the transistor Q3 is connected to the 8 pin of the transistor Q6, the 2 pin of the transistor Q3 is connected to the 7 pin of the transistor Q6, the 3 pin of the transistor Q3 is connected to the 6 pin of the transistor Q6, the connection between the transistor Q6 and the transistor Q3 is connected to one end of the inductor L1, the 8 pin of the transistor Q3 is respectively connected to one end of the capacitor C21, one end of the capacitor C29 and one end of the patch capacitor EC1, the other end of the inductor L1 is respectively connected to one end of the capacitor C37, one end of the capacitor C38, one end of the patch capacitor EC2, one end of the resistor R47 and one end of the resistor R58, the other end of the resistor R47 is respectively connected to the 5 pin of the transistor Q5 and the 6 pin of the transistor Q5, the other end of the resistor R54 is respectively connected to the 7 pin of the transistor Q5 and the 8 pin of the transistor Q5, the 3 pin of the transistor Q5 is respectively connected to the 1 pin of the USB connector USB6 and one end of the capacitor C44, the 1 pin of the transistor Q5 is connected to one end of the capacitor C39, the other end of the capacitor C30, the other end of the capacitor C31, the 29 pin of the protocol chip U8, the 26 pin of the protocol chip U8, the other end of the capacitor C4, the other end of the resistor R41, the other end of the resistor R44, the other end of the capacitor C40, the other end of the capacitor C43, the 13 pin of the protocol chip U8, the other end of the capacitor C21, the other end of the capacitor C29 and the other end of the patch capacitor EC1, the 1 pin of the transistor Q6, the 2 pin of the transistor Q6, the 3 pin of the transistor Q6, the other end of the capacitor C37, the other end of the capacitor C38, the other end of the patch capacitor EC2, the other end of the capacitor C44, the other end of the capacitor C39 and the 4 pin of the USB connector USB6 are grounded.

[0016] Compared with the prior art, the present application has the following beneficial effects:

[0017] 1. Through the innovative digital analog control technology, the mobile phone charger realizes the self-setting output voltage and current, and outputs through the USB port, which combines the super fast charging and adjustable power supply functions, so that the mobile phone charger realizes a wider use range, and one charger realizes the functions of multiple devices, the mobile phone charger, digital adjustable power supply and voltage current power meter, which saves the cost and working space of users;

[0018] 2. The problem that the output voltage and current of the mobile phone charger cannot be self-set is solved, so that one charger combines the functions of mobile phone fast charging and adjustable power supply, and expands the use range of the mobile phone charger;

[0019] 3. The MCU control protocol chip is used to adjust the voltage and current of the BUCK output circuit, so as to realize the precise adjustable voltage output, and the super fast charging function of the mobile phone charger is reserved, the mobile phone charger increases the MCU control protocol chip, and the function of self-setting the output voltage and current of the USB interface, which is different from the mobile phone charger which cannot realize the settable output voltage and current of the USB interface. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a front view of the application;

[0021] Figure 2 It is a rear view of the application;

[0022] Figure 3 It is an architecture schematic diagram of the application;

[0023] Figure 4 It is a circuit diagram of the first chip circuit of the application;

[0024] Figure 5 It is a second circuit diagram of the first chip circuit of the application;

[0025] Figure 6 It is a circuit diagram of the second chip circuit of the application;

[0026] Figure 7 It is a second circuit diagram of the second chip circuit of the application;

[0027] Figure 8 It is a circuit diagram of the third chip circuit of the application;

[0028] Figure 9 It is a second circuit diagram of the third chip circuit of the application;

[0029] Figure 10 It is a circuit diagram of the fourth chip circuit of the application;

[0030] Figure 11 It is a second circuit diagram of the fourth chip circuit of the application;

[0031] Figure 12 The circuit diagram of the MCU circuit of the application;

[0032] Figure 13 The circuit diagram of the LCD circuit of the application;

[0033] Figure 14 The circuit diagram of the wireless charging circuit of the application;

[0034] Figure 15 The circuit diagram of the key circuit of the application.

[0035] In the figure: 1, charger body; 2, LCD display screen; 3, key; 4, USB interface; 5, heat dissipation port; 6, power supply port; 7, power board; 8, protocol chip; 9, BUCK circuit; 10, MCU. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the embodiments of the application. Obviously, the described embodiments are only a part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments of the application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the application.

[0037] Please refer to Figures 1-15 The application provides a USB super-fast charging charger with freely settable output voltage, which comprises a charger body 1, a LCD display screen 2 fixedly installed on one side of the front face of the charger body 1, a plurality of USB interfaces 4 formed on the other side of the front face of the charger body 1, a key 3 fixedly installed on the middle part of the front face of the charger body 1, a power board 7 fixedly installed on one side of the bottom end of the inner wall of the charger body 1, a protocol chip 8 fixedly installed on one side of the power board 7 on the charger body 1, a plurality of BUCK circuits 9 fixedly installed on the other side of the bottom end of the inner wall of the charger body 1, and an MCU 10 fixedly installed in the charger body 1.

[0038] The plurality of BUCK circuits 9 are electrically connected with the plurality of USB interfaces 4 respectively, the key 3, the LCD display screen 2 and the protocol chip 8 are electrically connected with the MCU 10, a plurality of heat dissipation ports 5 are formed on the top end of the back face of the charger body 1, a power supply port 6 is formed on the bottom end of the back face of the charger body 1, and the LCD display screen 2, the MCU 10, the protocol chip 8, the power supply port 6 and the plurality of BUCK circuits 9 are electrically connected with the power board 7.

[0039] The application discloses a circuit of a USB super-fast charging charger with a freely set output voltage, which comprises a first chip circuit, a second chip circuit, a third chip circuit, a fourth chip circuit, an MCU circuit, an LCD circuit, a wireless charging circuit and a key circuit, and the first chip circuit comprises a capacitor C4, a capacitor C15, a resistor R41, a resistor R44, a resistor R45, a protocol chip U8, a capacitor C30, a capacitor C31, a capacitor C40, a capacitor C43, a capacitor C34, a transistor Q6, a transistor Q3, an inductor L1, a capacitor C37, a capacitor C38, a capacitor C21, a capacitor C29, a patch capacitor EC1, a patch capacitor EC2, a resistor R47, a resistor R54, a transistor Q5, a capacitor C39, a capacitor C44, a USB connector USB6 and a USB connector U11, the second chip circuit comprises a protocol chip U1, a resistor R16, a resistor R6, a resistor R4, a resistor R3, a capacitor C1, a capacitor C2, a capacitor C7, a capacitor C8, a capacitor C13, a capacitor C14, a capacitor C9, a transistor Q1, a transistor Q7, an inductor L2, a capacitor C3, a capacitor C6, a patch capacitor EC3, a capacitor C10, a capacitor C11, a patch capacitor EC4, a resistor R7, a resistor R9, a transistor Q2, a capacitor C12 and a capacitor C16, the third chip circuit comprises a protocol chip U4, a capacitor C17, a capacitor C20, a resistor R10, a resistor R11, a resistor R12, a capacitor C50, a capacitor C51, a capacitor C46, a transistor Q8, an inductor L3, a transistor Q10, a capacitor C22, a capacitor C45, a patch capacitor EC5, a resistor R13, a resistor R14, a capacitor C47, a capacitor C48, a patch capacitor EC6, a transistor Q9, a USB connector USB1, a USB connector USB2, a capacitor C49 and a capacitor C52, the fourth chip circuit comprises a protocol chip U9, a capacitor C53, a capacitor C54, a resistor R15, a resistor R17, a resistor R18, a capacitor C61, a capacitor C62, a capacitor C57, a transistor Q11, an inductor L4, a transistor Q13, a capacitor C55, a capacitor C56, a patch capacitor EC7, a resistor R20, a resistor R21, a capacitor C58, a capacitor C59, a patch capacitor EC8, a transistor Q12, a USB connector USB5, a USB connector USB9, a capacitor C60 and a capacitor C63, the MUC circuit comprises an MCU chip, a resistor R28, a capacitor C24, a capacitor C5, a capacitor C32, a resistor R34, a resistor R33, a resistor R25, a resistor R26, a resistor R27 and a resistor R29, the LCD circuit comprises an integrated circuit P13, a resistor R51, a resistor R49, a resistor R52, a capacitor C41, a capacitor C42 and a transistor Q4, the wireless charging circuit is internally provided with an integrated circuit P3, and the key circuit is internally provided with a capacitor C33 and a switch SW1.

[0040] The 3th pin of the integrated circuit P3 and the 4th pin of the integrated circuit P3 are grounded, one end of the capacitor C33 is connected with one end of the switch SW1, and the other end of the capacitor C33 is grounded.

[0041] The 16th pin of the integrated circuit P13 is connected with one end of the resistor R51 and one end of the resistor R52 and grounded, the other end of the resistor R51 is connected with the B pin of the triode Q4 and one end of the resistor R49, the E pin of the triode Q4 is connected with the other end of the resistor R52, the 3th pin of the integrated circuit P13 is connected with the C pin of the triode Q4, the 11th pin of the integrated circuit P13 is connected with one end of the capacitor C41 and one end of the capacitor C42, the other end of the capacitor C41, the other end of the capacitor C42 and the 2th pin of the integrated circuit P13 are grounded.

[0042] The 12th pin of the MCU chip is connected with one end of the resistor R28, the 24th pin of the MCU chip is connected with one end of the capacitor C24, the 48th pin of the MCU chip is connected with one end of the capacitor C5, the 9th pin of the MCU chip is connected with one end of the capacitor C32, the 44th pin of the MCU chip is connected with one end of the resistor R33, the 7th pin of the MCU chip is connected with one end of the resistor R34, the 41th pin of the MCU chip is connected with one end of the resistor R25, the 42th pin of the MCU chip is connected with one end of the resistor R26, the 43th pin of the MCU chip is connected with one end of the resistor R27, the 27th pin of the MCU chip is connected with one end of the resistor R29, the other end of the capacitor C24, the other end of the capacitor C5, the other end of the capacitor C32, the other end of the resistor R33, the 23th pin of the MCU chip, the 47th pin of the MCU chip and the 8th pin of the MCU chip are grounded, and the other end of the resistor R34 is connected with the power supply 3.3V outputted by the 5th pin of the LDO chip U3.

[0043] The 25th pin of the protocol chip U9 is connected with one end of the capacitor C53 and one end of the capacitor C54, the other end of the capacitor C54 is connected with one end of the resistor R15, the 24th pin of the protocol chip U9 is connected with one end of the resistor R18, the other end of the resistor R18 is connected with one end of the resistor R17, the 12th pin of the protocol chip U9 is connected with one end of the capacitor C61, the 14th pin of the protocol chip U9 is connected with one end of the capacitor C62, the 15th pin of the protocol chip U9 is connected with one end of the capacitor C57, the 18th pin of the protocol chip U9 is connected with the other end of the capacitor C57, one end of the transistor Q11, one end of the inductor L4 and one end of the transistor Q13 respectively, the 8th pin of the transistor Q11 is connected with one end of the capacitor C55, one end of the capacitor C56 and one end of the patch capacitor EC7 respectively, the other end of the inductor L4 is connected with one end of the resistor R20, one end of the resistor R21, one end of the capacitor C58, one end of the capacitor C59 and one end of the patch capacitor EC8 respectively, the other end of the resistor R20 is connected with the 5th pin and the 6th pin of the transistor Q12 respectively, the other end of the resistor R21 is connected with the 7th pin and the 8th pin of the transistor Q12 respectively, the 3rd pin of the transistor Q12 is connected with one end of the capacitor C63 and the 1st pin of the USB connector USB9 respectively, the 1st pin of the transistor Q12 is connected with one end of the capacitor C60 and the 1st pin of the USB connector USB5 respectively, the 29th pin of the protocol chip U9, the 26th pin of the protocol chip U9, the other end of the resistor R15, the other end of the capacitor C53, the other end of the resistor R17, the other end of the capacitor C61, the other end of the capacitor C62, the 13th pin of the protocol chip U9, the 1st pin of the transistor Q13, the 2nd pin of the transistor Q13, the 3rd pin of the transistor Q13, the other end of the capacitor C55, the other end of the capacitor C56, the other end of the patch capacitor EC7, the other end of the capacitor C58, the other end of the capacitor C59, the other end of the patch capacitor EC8, the other end of the capacitor C60, the other end of the capacitor C63, the 4th pin of the USB connector USB5 and the 4th pin of the USB connector USB9 are grounded.

[0044] The 25th pin of the protocol chip U4 is connected with one end of the capacitor C17 and one end of the capacitor C20, the other end of the capacitor C20 is connected with one end of the resistor R10, the 24th pin of the protocol chip U4 is connected with one end of the resistor R12, the other end of the resistor R12 is connected with one end of the resistor R11, the 12th pin of the protocol chip U4 is connected with one end of the capacitor C50, the 14th pin of the protocol chip U4 is connected with one end of the capacitor C51, the 15th pin of the protocol chip U4 is connected with one end of the capacitor C46, the 18th pin of the protocol chip U4 is connected with the other end of the capacitor C46, one end of the transistor Q8, one end of the inductor L3 and one end of the transistor Q10 respectively, the 8th pin of the transistor Q8 is connected with one end of the capacitor C22, one end of the capacitor C45 and one end of the patch capacitor EC5 respectively, the other end of the inductor L3 is connected with one end of the resistor R13, one end of the resistor R14, one end of the capacitor C47, one end of the capacitor C48 and one end of the patch capacitor EC6 respectively, the other end of the resistor R13 is connected with the 5th pin and the 6th pin of the transistor Q9 respectively, the other end of the resistor R14 is connected with the 7th pin and the 8th pin of the transistor Q9 respectively, the 3rd pin of the transistor Q9 is connected with one end of the capacitor C52 and the 1st pin of the USB connector USB2 respectively, the 1st pin of the transistor Q9 is connected with one end of the capacitor C49 and the 1st pin of the USB connector USB1 respectively, the 29th pin of the protocol chip U4, the 26th pin of the protocol chip U4, the other end of the resistor R10, the other end of the capacitor C17, the other end of the resistor R11, the other end of the capacitor C50, the other end of the capacitor C51, the 13th pin of the protocol chip U4, the 1st pin, the 2nd pin and the 3rd pin of the transistor Q10, the other end of the capacitor C22, the other end of the capacitor C45, the other end of the patch capacitor EC5, the other end of the capacitor C47, the other end of the capacitor C48, the other end of the patch capacitor EC6, the other end of the capacitor C49, the other end of the capacitor C52, the 4th pin of the USB connector USB1 and the 4th pin of the USB connector USB2 are grounded.

[0045] The 26 pin of the protocol chip U1 is connected with one end of the resistance R16, the 25 pin of the protocol chip U1 is connected with one end of the capacitor C1 and one end of the capacitor C2 respectively, the other end of the capacitor C2 is connected with one end of the resistance R3, the 24 pin of the protocol chip U1 is connected with one end of the resistance R6, the other end of the resistance R6 is connected with one end of the resistance R4, the 1 pin of the protocol chip U1 is connected with one end of the capacitor C7, the 2 pin of the protocol chip U1 is connected with one end of the capacitor C8, the 12 pin of the protocol chip U1 is connected with one end of the capacitor C13, the 14 pin of the protocol chip U1 is connected with one end of the capacitor C14, the 15 pin of the protocol chip U1 is connected with one end of the capacitor C9, the 18 pin of the protocol chip U1 and the other end of the capacitor C9 are connected with one end of the transistor Q1, one end of the transistor Q7 and one end of the inductor L2 respectively, the 8 pin of the transistor Q1 is connected with one end of the capacitor C3, one end of the capacitor C6 and one end of the patch capacitor EC3 respectively, the other end of the inductor L2 is connected with the resistance R7, one end of the resistance R9, one end of the capacitor C10, one end of the capacitor C11 and one end of the patch capacitor EC4 respectively, the other end of the resistance R7 is connected with the 5 pin and the 6 pin of the transistor Q2 respectively, the other end of the resistance R9 is connected with the 7 pin and the 8 pin of the transistor Q2 respectively, the 3 pin of the transistor Q2 is connected with one end of the capacitor C12, the 1 pin of the transistor Q2 is connected with one end of the capacitor C16 and the 1 pin of the USB connector USB10 respectively, the 29 pin of the protocol chip U1, the other end of the capacitor C1, the other end of the resistance R3, the other end of the resistance R4, the other end of the capacitor C7, the other end of the capacitor C8, the other end of the capacitor C13, the other end of the capacitor C14, the 13 pin of the protocol chip U1, the other end of the capacitor C3, the other end of the capacitor C6, the other end of the patch capacitor EC3, the 1 pin, the 2 pin and the 3 pin of the transistor Q7, the other end of the capacitor C10, the other end of the capacitor C11, the other end of the patch capacitor EC4, the other end of the capacitor C12, the other end of the capacitor C16 and the 5 pin and the 6 pin of the USB connector USB10 are grounded.

[0046] The 1 terminal pin of the protocol chip U8 is connected with one end of the capacitor C30, the 2 terminal pin of the protocol chip U8 is connected with one end of the capacitor C31, the 25 terminal pin of the protocol chip U8 is connected with one end of the capacitor C4 and one end of the capacitor C15 respectively, the other end of the capacitor C15 is connected with one end of the resistor R41, the 24 terminal pin of the protocol chip U8 is connected with one end of the resistor R45, the other end of the resistor R45 is connected with one end of the resistor R44, the 12 terminal pin of the protocol chip U8 is connected with one end of the capacitor C40, the 14 terminal pin of the protocol chip U8 is connected with one end of the capacitor C43, the 15 terminal pin of the protocol chip U8 is connected with one end of the capacitor C34, the 18 terminal pin of the protocol chip U8 and the other end of the capacitor C34 are both connected with one end of the transistor Q6, the 19 terminal pin of the protocol chip U8 is connected with one end of the transistor Q3, the 1 terminal pin of the transistor Q3 is connected with the 8 terminal pin of the transistor Q6, the 2 terminal pin of the transistor Q3 is connected with the 7 terminal pin of the transistor Q6, the 3 terminal pin of the transistor Q3 is connected with the 6 terminal pin of the transistor Q6, the connection between the transistor Q6 and the transistor Q3 is connected with one end of the inductor L1, the 8 terminal pin of the transistor Q3 is connected with one end of the capacitor C21, one end of the capacitor C29 and one end of the patch capacitor EC1 respectively, the other end of the inductor L1 is connected with one end of the capacitor C37, one end of the capacitor C38, one end of the patch capacitor EC2, one end of the resistor R47 and one end of the resistor R58 respectively, the other end of the resistor R47 is connected with the 5 terminal pin of the transistor Q5 and the 6 terminal pin of the transistor Q5 respectively, the other end of the resistor R54 is connected with the 7 terminal pin of the transistor Q5 and the 8 terminal pin of the transistor Q5 respectively, the 3 terminal pin of the transistor Q5 is connected with the 1 terminal pin of the USB connector USB6 and one end of the capacitor C44 respectively, the 1 terminal pin of the transistor Q5 is connected with one end of the capacitor C39, the other end of the capacitor C30, the other end of the capacitor C31, the 29 terminal pin of the protocol chip U8, the 26 terminal pin of the protocol chip U8, the other end of the capacitor C4, the other end of the resistor R41, the other end of the resistor R44, the other end of the capacitor C40, the other end of the capacitor C43, the 13 terminal pin of the protocol chip U8, the other end of the capacitor C21, the other end of the capacitor C29 and the other end of the patch capacitor EC1, the 1 terminal pin of the transistor Q6, the 2 terminal pin of the transistor Q6, the 3 terminal pin of the transistor Q6, the other end of the capacitor C37, the other end of the capacitor C38, the other end of the patch capacitor EC2, the other end of the capacitor C44, the other end of the capacitor C39 and the 4 terminal pin of the USB connector USB6 are grounded.

[0047] In the application, the product is composed of an LCD display screen 2, an MCU 10, a button 3, a power board 7, a protocol chip 8, a BUCK circuit 9 and a USB interface 4, the power board 7 is powered; the LCD display screen 2 is responsible for displaying the output voltage / current / power / charging time / charging capacity / timing / interface state; the button 3 is responsible for setting the function and the output voltage; the MCU 10 is responsible for display driving and control of the protocol chip 8; the protocol chip 8 is responsible for controlling the BUCK circuit 9; the BUCK circuit 9 is responsible for voltage reduction output; the USB interface 4 is responsible for external voltage and current output, the button 3 is responsible for setting the function and the output voltage, the MCU 10 receives the setting information of the button and then drives the display screen to display the voltage, current and power parameters in real time, the power board 7 powers the display screen, the MCU 10, the protocol chip 8 and the BUCK circuit 9; the protocol chip 8 receives the voltage and current output information from the MCU 10 and then controls the BUCK circuit 9 to output the corresponding voltage, the BUCK circuit 9 is connected to the USB interface 4 after voltage reduction and outputs externally;

[0048] The extended use scenarios are as follows:

[0049] a. When the people in the mobile phone repair industry need to use 3.7V to power the mobile phone board or charge the lithium battery, the charger of the application is directly set to output 3.7V voltage, so that another adjustable power supply device is not needed to power, because the default voltage of the charger is 5V and the output voltage cannot be set, so the mobile phone mainboard or lithium battery cannot be directly powered;

[0050] b. When the battery of the car needs to be charged, a special 12V power supply is often needed, at this time, the charger of the application is directly set to output 12V voltage, and the USB interface is used to output power to the battery.

[0051] Although the application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or equivalently replace part of the technical features, any modification, equivalent replacement, improvement, etc. within the spirit and principles of the application shall be included in the protection scope of the application.

Claims

1. A USB super-fast charger with freely adjustable output voltage and current, comprising a charger body (1), characterized in that: One side of the charger body (1) front is equipped with LCD display (2), the charger body (1) front is equipped with several USB interface (4) on the other side, the charger body (1) front is equipped with the key (3) in the middle, the bottom end of the inner wall of the charger body (1) is equipped with power panel (7) on one side, the charger body (1) is equipped with protocol chip (8) on the side of power panel (7) on the top, the bottom end of the inner wall of the charger body (1) is equipped with several BUCK circuit (9) on the other side, the inside of the charger body (1) is equipped with MCU (10).

2. The USB super-fast charger with freely settable output voltage and current according to claim 1, characterized in that: Several BUCK circuit (9) is respectively connected with several USB interface (4), the key (3), LCD display (2), protocol chip (8) are all connected with MCU (10), the top of the back of the charger body (1) is equipped with several heat dissipation opening (5), the bottom of the back of the charger body (1) is equipped with power supply opening (6), the LCD display (2), MCU (10), protocol chip (8), power supply opening (6) and several BUCK circuit (9) are all connected with power panel (7).

3. The circuit of the USB super-fast charger with freely adjustable output voltage and current according to any one of claims 1-2, comprising a first chip circuit, a second chip circuit, a third chip circuit, a fourth chip circuit, an MCU circuit, an LCD circuit, a wireless charging circuit, and a button circuit, characterized in that: The first chip circuit includes capacitor C4, capacitor C15, resistor R41, resistor R44, resistor R45, protocol chip U8, capacitor C30, capacitor C31, capacitor C40, capacitor C43, capacitor C34, transistor Q6, transistor Q3, inductor L1, capacitor C37, capacitor C38, capacitor C21, capacitor C29, patch capacitor EC1, patch capacitor EC2, resistor R47, resistor R54, transistor Q5, capacitor C39, capacitor C44, and USB connector USB6 and USB connector U11, the second chip circuit includes protocol chip U1, resistor R16, resistor R6, resistor R4, resistor R3, capacitor C1, capacitor C2, capacitor C7, capacitor C8, capacitor C13, capacitor C14, capacitor C9, transistor Q1, transistor Q7, inductor L2, capacitor C3, capacitor C6, patch capacitor EC3, capacitor C10, capacitor C11, patch capacitor EC4, resistor R7, resistor R9, transistor Q2, capacitor C12, capacitor C16, and USB connector USB10 and USB connector U2, the third chip circuit includes protocol chip U4, capacitor C17, capacitor C20, resistor R10, resistor R11, resistor R12, capacitor C50, capacitor C51, capacitor C46, transistor Q8, inductor L3, transistor Q10, capacitor C22, capacitor C45, patch capacitor EC5, resistor R13, resistor R14, capacitor C47, capacitor C48, patch capacitor EC6, transistor Q9, USB connector USB1, USB connector USB2, capacitor C49, and capacitor C52, the fourth chip circuit includes protocol chip U9, capacitor C53, capacitor C54, resistor R15, resistor R17, resistor R18, capacitor C61, capacitor C62, capacitor C57, transistor Q11, inductor L4, transistor Q13, capacitor C55, capacitor C56, patch capacitor EC7, resistor R20, resistor R21, capacitor C58, capacitor C59, patch capacitor EC8, transistor Q12, USB connector USB5, USB connector USB9, capacitor C60, and capacitor C63, the MUC circuit includes MCU chip, resistor R28, capacitor C24, capacitor C5, capacitor C32, resistor R34, resistor R33, resistor R25, resistor R26, resistor R27, and resistor R29, the LCD circuit includes integrated circuit P13, resistor R51, resistor R49, resistor R52, capacitor C41, capacitor C42, and transistor Q4, the wireless charging circuit is internally provided with integrated circuit P3, and the key circuit is internally provided with capacitor C33 and switch SW1.

4. The circuit of the USB super-fast charger with freely settable output voltage according to claim 3, characterized in that: The 3 terminal pin of the integrated circuit P3 and the 4 terminal pin of the integrated circuit P3 are grounded, one end of the capacitor C33 is connected with one end of the switch SW1, and the other end of the capacitor C33 is grounded.

5. The circuit of the USB super-fast charger with freely settable output voltage and current according to claim 3, characterized in that: The 16 pin of the integrated circuit P13 is connected with one end of the resistor R51 and one end of the resistor R52 and grounded, the other end of the resistor R51 is connected with the B pin of the triode Q4 and one end of the resistor R49, the E pin of the triode Q4 is connected with the other end of the resistor R52, the 3 pin of the integrated circuit P13 is connected with the C pin of the triode Q4, the 11 pin of the integrated circuit P13 is connected with one end of the capacitor C41 and one end of the capacitor C42, the other end of the capacitor C41, the other end of the capacitor C42 and the 2 pin of the integrated circuit P13 are grounded.

6. The circuit of the USB super-fast charger with freely settable output voltage and current according to claim 3, characterized in that: The 12 pin of the MCU chip is connected with one end of the resistor R28, the 24 pin of the MCU chip is connected with one end of the capacitor C24, the 48 pin of the MCU chip is connected with one end of the capacitor C5, the 9 pin of the MCU chip is connected with one end of the capacitor C32, the 44 pin of the MCU chip is connected with one end of the resistor R33, the 7 pin of the MCU chip is connected with one end of the resistor R34, the 41 pin of the MCU chip is connected with one end of the resistor R25, the 42 pin of the MCU chip is connected with one end of the resistor R26, the 43 pin of the MCU chip is connected with one end of the resistor R27, the 27 pin of the MCU chip is connected with one end of the resistor R29, the other end of the capacitor C24, the other end of the capacitor C5, the other end of the capacitor C32, the other end of the resistor R33, the 23 pin of the MCU chip, the 47 pin of the MCU chip and the 8 pin of the MCU chip are grounded. The other end of the resistor R34 is connected with the power supply 3.3V outputted from the 5th pin of the LDO chip U3.

7. The circuit of the USB super-fast charger with freely settable output voltage and current according to claim 3, characterized in that: The 25 pin of the protocol chip U9 is connected with one end of the capacitor C53 and one end of the capacitor C54 respectively, the other end of the capacitor C54 is connected with one end of the resistor R15, the 24 pin of the protocol chip U9 is connected with one end of the resistor R18, the other end of the resistor R18 is connected with one end of the resistor R17, the 12 pin of the protocol chip U9 is connected with one end of the capacitor C61, the 14 pin of the protocol chip U9 is connected with one end of the capacitor C62, the 15 pin of the protocol chip U9 is connected with one end of the capacitor C57, the 18 pin of the protocol chip U9 is connected with the other end of the capacitor C57, one end of the transistor Q11, one end of the inductor L4 and one end of the transistor Q13 respectively, the 8 pin of the transistor Q11 is connected with one end of the capacitor C55, one end of the capacitor C56 and one end of the patch capacitor EC7 respectively, the other end of the inductor L4 is connected with one end of the resistor R20, one end of the resistor R21, one end of the capacitor C58, one end of the capacitor C59 and one end of the patch capacitor EC8 respectively, the other end of the resistor R20 is connected with the 5 pin and the 6 pin of the transistor Q12 respectively, the other end of the resistor R21 is connected with the 7 pin and the 8 pin of the transistor Q12 respectively, the 3 pin of the transistor Q12 is connected with one end of the capacitor C63 and the 1 pin of the USB connector USB9 respectively, the 1 pin of the transistor Q12 is connected with one end of the capacitor C60 and the 1 pin of the USB connector USB5 respectively, the 29 pin of the protocol chip U9, the 26 pin of the protocol chip U9, the other end of the resistor R15, the other end of the capacitor C53, the other end of the resistor R17, the other end of the capacitor C61, the other end of the capacitor C62, the 13 pin of the protocol chip U9, the 1 pin of the transistor Q13, the 2 pin of the transistor Q13, the 3 pin of the transistor Q13, the other end of the capacitor C55, the other end of the capacitor C56, the other end of the patch capacitor EC7, the other end of the capacitor C58, the other end of the capacitor C59, the other end of the patch capacitor EC8, the other end of the capacitor C60, the other end of the capacitor C63, the 4 pin of the USB connector USB5 and the 4 pin of the USB connector USB9 are grounded.

8. The circuit of the USB super-fast charger with freely settable output voltage and current according to claim 3, characterized in that: The 25 pin of the protocol chip U4 is connected with one end of the capacitor C17 and one end of the capacitor C20, the other end of the capacitor C20 is connected with one end of the resistor R10, the 24 pin of the protocol chip U4 is connected with one end of the resistor R12, the other end of the resistor R12 is connected with one end of the resistor R11, the 12 pin of the protocol chip U4 is connected with one end of the capacitor C50, the 14 pin of the protocol chip U4 is connected with one end of the capacitor C51, the 15 pin of the protocol chip U4 is connected with one end of the capacitor C46, the 18 pin of the protocol chip U4 is connected with the other end of the capacitor C46, one end of the transistor Q8, one end of the inductor L3 and one end of the transistor Q10 respectively, the 8 pin of the transistor Q8 is connected with one end of the capacitor C22, one end of the capacitor C45 and one end of the patch capacitor EC5 respectively, the other end of the inductor L3 is connected with one end of the resistor R13, one end of the resistor R14, one end of the capacitor C47, one end of the capacitor C48 and one end of the patch capacitor EC6 respectively, the other end of the resistor R13 is connected with the 5 pin and the 6 pin of the transistor Q9 respectively, the other end of the resistor R14 is connected with the 7 pin and the 8 pin of the transistor Q9 respectively, the 3 pin of the transistor Q9 is connected with one end of the capacitor C52 and the 1 pin of the USB connector USB2 respectively, the 1 pin of the transistor Q9 is connected with one end of the capacitor C49 and the 1 pin of the USB connector USB1 respectively, the 29 pin of the protocol chip U4, the 26 pin of the protocol chip U4, the other end of the resistor R10, the other end of the capacitor C17, the other end of the resistor R11, the other end of the capacitor C50, the other end of the capacitor C51, the 13 pin of the protocol chip U4, the 1 pin of the transistor Q10, the 2 pin of the transistor Q10, the 3 pin of the transistor Q10, the other end of the capacitor C22, the other end of the capacitor C45, the other end of the patch capacitor EC5, the other end of the capacitor C47, the other end of the capacitor C48, the other end of the patch capacitor EC6, the other end of the capacitor C49, the other end of the capacitor C52, the 4 pin of the USB connector USB1 and the 4 pin of the USB connector USB2 are grounded.

9. The circuit of the USB super-fast charger with freely settable output voltage and current according to claim 3, characterized in that: The 26 pin of the protocol chip U1 is connected with one end of the resistance R16, the 25 pin of the protocol chip U1 is connected with one end of the capacitor C1 and one end of the capacitor C2 respectively, the other end of the capacitor C2 is connected with one end of the resistance R3, the 24 pin of the protocol chip U1 is connected with one end of the resistance R6, the other end of the resistance R6 is connected with one end of the resistance R4, the 1 pin of the protocol chip U1 is connected with one end of the capacitor C7, the 2 pin of the protocol chip U1 is connected with one end of the capacitor C8, the 12 pin of the protocol chip U1 is connected with one end of the capacitor C13, the 14 pin of the protocol chip U1 is connected with one end of the capacitor C14, the 15 pin of the protocol chip U1 is connected with one end of the capacitor C9, the 18 pin of the protocol chip U1 and the other end of the capacitor C9 are connected with one end of the transistor Q1, one end of the transistor Q7 and one end of the inductor L2 respectively, the 8 pin of the transistor Q1 is connected with one end of the capacitor C3, one end of the capacitor C6 and one end of the patch capacitor EC3 respectively, the other end of the inductor L2 is connected with the resistance R7, one end of the resistance R9, one end of the capacitor C10, one end of the capacitor C11 and one end of the patch capacitor EC4 respectively, the other end of the resistance R7 is connected with the 5 pin and the 6 pin of the transistor Q2 respectively, the other end of the resistance R9 is connected with the 7 pin and the 8 pin of the transistor Q2 respectively, the 3 pin of the transistor Q2 is connected with one end of the capacitor C12, the 1 pin of the transistor Q2 is connected with one end of the capacitor C16 and the 1 pin of the USB connector USB10 respectively, the 29 pin of the protocol chip U1, the other end of the capacitor C1, the other end of the resistance R3, the other end of the resistance R4, the other end of the capacitor C7, the other end of the capacitor C8, the other end of the capacitor C13, the other end of the capacitor C14, the 13 pin of the protocol chip U1, the other end of the capacitor C3, the other end of the capacitor C6, the other end of the patch capacitor EC3, the 1 pin, the 2 pin and the 3 pin of the transistor Q7, the other end of the capacitor C10, the other end of the capacitor C11, the other end of the patch capacitor EC4, the other end of the capacitor C12, the other end of the capacitor C16 and the 5 pin and the 6 pin of the USB connector USB10 are grounded.

10. The circuit of the USB super-fast charger with freely settable output voltage and current according to claim 3, characterized in that: The 1 end pin of the protocol chip U8 is connected with one end of the capacitor C30, the 2 end pin of the protocol chip U8 is connected with one end of the capacitor C31, the 25 end pin of the protocol chip U8 is connected with one end of the capacitor C4 and one end of the capacitor C15 respectively, the other end of the capacitor C15 is connected with one end of the resistor R41, the 24 end pin of the protocol chip U8 is connected with one end of the resistor R45, the other end of the resistor R45 is connected with one end of the resistor R44, the 12 end pin of the protocol chip U8 is connected with one end of the capacitor C40, the 14 end pin of the protocol chip U8 is connected with one end of the capacitor C43, the 15 end pin of the protocol chip U8 is connected with one end of the capacitor C34, the 18 end pin of the protocol chip U8 and the other end of the capacitor C34 are both connected with one end of the transistor Q6, the 19 end pin of the protocol chip U8 is connected with one end of the transistor Q3, the 1 end pin of the transistor Q3 is connected with the 8 end pin of the transistor Q6, the 2 end pin of the transistor Q3 is connected with the 7 end pin of the transistor Q6, the 3 end pin of the transistor Q3 is connected with the 6 end pin of the transistor Q6, the connection between the transistor Q6 and the transistor Q3 is connected with one end of the inductor L1, the 8 end pin of the transistor Q3 is connected with one end of the capacitor C21, one end of the capacitor C29 and one end of the patch capacitor EC1 respectively, the other end of the inductor L1 is connected with one end of the capacitor C37, one end of the capacitor C38, one end of the patch capacitor EC2, one end of the resistor R47 and one end of the resistor R58 respectively, the other end of the resistor R47 is connected with the 5 end pin of the transistor Q5 and the 6 end pin of the transistor Q5 respectively, the other end of the resistor R54 is connected with the 7 end pin of the transistor Q5 and the 8 end pin of the transistor Q5 respectively, the 3 end pin of the transistor Q5 is connected with the 1 end pin of the USB connector USB6 and one end of the capacitor C44 respectively, the 1 end pin of the transistor Q5 is connected with one end of the capacitor C39, the other end of the capacitor C30, the other end of the capacitor C31, the 29 end pin of the protocol chip U8, the 26 end pin of the protocol chip U8, the other end of the capacitor C4, the other end of the resistor R41, the other end of the resistor R44, the other end of the capacitor C40, the other end of the capacitor C43, the 13 end pin of the protocol chip U8, the other end of the capacitor C21, the other end of the capacitor C29 and the other end of the patch capacitor EC1, the 1 end pin of the transistor Q6, the 2 end pin of the transistor Q6, the 3 end pin of the transistor Q6, the other end of the capacitor C37, the other end of the capacitor C38, the other end of the patch capacitor EC2, the other end of the capacitor C44, the other end of the capacitor C39 and the 4 end pin of the USB connector USB6 are grounded.

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