Intelligent switching circuit of double-port charger

Abstract

The utility model discloses an intelligent switching circuit for a double-port charger, which comprises a power supply circuit, a control circuit, a first output unit and a second output unit are respectively arranged on the right side of the power supply circuit, and the control end of the first output unit and the control end of the second output unit are respectively and electrically connected with the control circuit. The power input end of the control circuit, the power input end of the first output unit and the power input end of the second output unit are electrically connected with the output end of the power circuit. According to the utility model, the problem of low charging efficiency of a traditional double-port charger in the prior art is solved. The charger has the advantages of simplicity in use, low cost, high charging efficiency and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to a charging equipment field more specifically, relate to a double -port charger intelligent switching circuit. BACKGROUND

[0002] The double -port electronic equipment charger that most of current market uses mostly one high -power (C1), another only has smaller constant power configuration (C2), when charging notebook, tablet computer and so on equipment, because C2 mouth charging power is small, cannot satisfy the charging requirement, and the charging line must be inserted C1 can charge, and two mouths charge simultaneously, because C2 mouth power is small, even if C1 pulls out, C2 also cannot increase charging power, use extremely inconvenient.

[0003] At present, a small size double -port charger is disclosed on China patent network, and the publication number CN214900277U includes a charger body, the charger body one side fixed installation has a charging board, the charging board one end is provided with output C mouth, the other end of the charging board is fixedly installed with a charging column, the charging column one end is provided with output A mouth, the inside of the charger body is fixedly installed with input rectifier circuit, PWM circuit, output rectifier circuit, current detection circuit and protocol chip control circuit from left to right, the PWM circuit is electrically connected with the output rectifier circuit, the utility model discloses a small size double -port charger, and the charger body is small and convenient, and easy to carry, and the protocol chip control circuit obtains the corresponding charging information of the charging equipment when the charging equipment is inserted into the output interface, provides the most matched current or voltage for the charging equipment and charges, improves the charging efficiency, and the double -port can provide multiple charging equipment charging to maximize the use of the charger body.

[0004] Although the small size double -port charger in the above patent has the advantage of small size, but its charging efficiency is low. UTILITY MODEL CONTENTS

[0005] The utility model discloses in order to overcome the traditional double -port charger charging efficiency lower problem in the prior art, and now provides a double -port charger intelligent switching circuit with higher efficiency charging function.

[0006] The utility model discloses a double -port charger intelligent switching circuit, including power supply circuit, the power supply circuit right side is equipped with control circuit, output unit and no.

[0007] As preferred, the power supply circuit comprises power connector P1, chip IC3, chip IC4, rectifier bridge BD1, rectifier bridge BD2, inductor LF1, inductor L2, inductor L3, transformer TR1, polarized capacitor EC1, polarized capacitor EC2, polarized capacitor EC3, polarized capacitor EC4, polarized capacitor EC5, polarized capacitor EC6, polarized capacitor EC7, polarized capacitor EC8, breaker F1, breaker FB1, MOS tube Q8, MOS tube Q9, thermistor NTC1, optocoupler U1, resistor R36, resistor R37, resistor R38, resistor R39, resistor R40, resistor R43, resistor R44, resistor R45, resistor R46, resistor R47, resistor R49, resistor 50, resistor 51, resistor 52, resistor 53, resistor 54, resistor 55, resistor 56, resistor 57, resistor 58, resistor 59, resistor 60, resistor 61, resistor 62, diode D1, diode D2, diode D3, diode D4, diode D5, capacitor CX1, capacitor CY1, capacitor C43, capacitor C44, capacitor C45, capacitor C47, capacitor C48, capacitor C49, capacitor C50, capacitor C51, capacitor C52 and capacitor C53, one pin of the power connector P1 is electrically connected with one end of the breaker F1, the other end of the breaker F1 is electrically connected with one end of the capacitor CX1, one end of the resistor R39 and the 2 pin of the inductor LF1 respectively, the 2 pin of the power connector P1 is electrically connected with the other end of the capacitor CX1, the other end of the resistor R39 and the 3 pin of the inductor LF1 respectively, the 4 pin of the inductor LF1 is electrically connected with the 2 pin of the rectifier bridge BD1, the positive electrode of the diode D3 and the 1 pin of the rectifier bridge BD1 respectively, the 1 pin of the inductor LF1 is electrically connected with the 2 pin of the rectifier bridge BD2, the positive electrode of the diode D4 and the 1 pin of the rectifier bridge BD2 respectively, the 4 pin of the rectifier bridge BD1 is electrically connected with the 4 pin of the rectifier bridge BD2, the negative electrode of the polarized capacitor EC3, the negative electrode of the polarized capacitor EC4, the negative electrode of the polarized capacitor EC5, the negative electrode of the polarized capacitor EC6, the negative electrode of the polarized capacitor EC7 and one end of the capacitor C45 respectively, the negative electrode of the polarized capacitor EC3 is connected with the protection ground, the 3 pin of the rectifier bridge BD1 is electrically connected with the 3 pin of the rectifier bridge BD2, the positive electrode of the polarized capacitor EC3, one end of the inductor L2 and one end of the resistor R36 respectively, the other end of the inductor L2 is electrically connected with the other end of the resistor R36, the positive electrode of the polarized capacitor EC4, the positive electrode of the polarized capacitor EC5, the positive electrode of the polarized capacitor EC6, the positive electrode of the polarized capacitor EC7, the other end of the capacitor C45, one end of the resistor R37, one end of the resistor R38, one end of the capacitor C43 and the 1 pin of the transformer TR1 respectively, the negative electrode of the diode D3 is electrically connected with the negative electrode of the diode D4 and one end of the resistor 50 respectively, the other end of the resistor 50 is electrically connected with one end of the resistor 51,The other end of the resistance R51 is electrically connected with the 10 pin of the chip IC4, the 1 pin of the chip IC4 is electrically connected with one end of the resistance R57, the other end of the resistance R57 is electrically connected with one end of the thermistor NTC1, the other end of the thermistor NTC1 is electrically connected with the 2 pin of the photoelectric coupler U1, one end of the capacitor C51, one end of the resistance R62, one end of the capacitor C52 and one end of the capacitor C53 respectively, the 2 pin of the chip IC4 is electrically connected with one end of the inductor L3, the other end of the inductor L3 is electrically connected with one end of the capacitor C49 and the positive pole of the polar capacitor EC8 respectively, the other end of the capacitor C49 is connected with the protection ground, the 3 pin of the chip IC4 is electrically connected with the 1 pin of the photoelectric coupler U1 and the other end of the capacitor C51 respectively, the 4 pin of the chip IC4 is electrically connected with one end of the resistance R53, the other end of the resistance R62 and the other end of the capacitor C52 respectively, the other end of the resistance R53 is electrically connected with the 4 pin of the transformer TR1, the 5 pin of the chip IC4 is electrically connected with the other end of the capacitor C53 and one end of the resistance R58 respectively, one end of the capacitor C52 is connected with the protection ground, the 6 pin of the chip IC4 is electrically connected with one end of the capacitor C50, the 6 pin of the chip IC4 is connected with the protection ground, the other end of the capacitor C50 is electrically connected with the 8 pin of the chip IC4, the 7 pin of the chip IC4 is electrically connected with the negative pole of the diode D5 and one end of the resistance R55 respectively, the positive pole of the diode D5 is electrically connected with one end of the resistance R54, the other end of the resistance R54 is electrically connected with the other end of the resistance R55, one end of the resistance R56 and the 1 pin of the MOS Q1 respectively, the 3 pin of the MOS Q1 is electrically connected with the other end of the resistance R56, the other end of the resistance R58, one end of the resistance R59, one end of the resistance R60 and one end of the resistance R61 respectively, the other end of the resistance R59 is electrically connected with the other end of the resistance R60 and the other end of the resistance R61 respectively, the other end of the resistance R60 is connected with the protection ground, the 2 pin of the MOS Q1 is electrically connected with one end of the breaker FB1 and one end of the capacitor C48 respectively, the other end of the capacitor C48 is electrically connected with the 3 pin of the MOS Q1, the other end of the resistance R37 is electrically connected with the other end of the resistance R38, the other end of the capacitor C43 and one end of the resistance R45 respectively, the other end of the R45 is electrically connected with the positive pole of the diode D2, the negative pole of the diode D2 is electrically connected with the other end of the breaker FB1 and the 2 pin of the transformer TR1 respectively, the 4 pin of the transformer TR1 is electrically connected with the positive pole of the diode D1, the negative pole of the diode D1 is electrically connected with one end of the resistance R43 and the positive pole of the polar capacitor EC8, the negative pole of the polar capacitor EC8 is connected with the protection ground, the 3 pin of the transformer TR1 is connected with the protection ground,The 5-pin of the transformer TR1 is respectively connected with one end of the resistance R46, the positive pole of the polarity capacitor EC1 and the positive pole of the polarity capacitor EC2, the 5-pin of the transformer TR1 outputs VIN, the 6-pin of the transformer TR1 is respectively connected with the 1-pin of the MOS tube, one end of the capacitor C44 and one end of the resistance R47, the other end of the capacitor C44 is connected with one end of the resistance R40, the other end of the resistance R40 is respectively connected with the 2-pin of the MOS tube, the negative pole of the polarity capacitor EC1 and the negative pole of the polarity capacitor EC2, the negative pole of the polarity capacitor EC2 is connected with the common ground, the other end of the resistance R47 is connected with the 6-pin of the chip IC3, the 5-pin of the chip IC3 is connected with the 3-pin of the MOS tube, the 4-pin of the chip IC3 is connected with one end of the capacitor C47, the other end of the capacitor C47 is respectively connected with one end of the resistance R52, the 2-pin of the chip IC3 and one end of the resistance R49, the 3-pin of the chip IC3 is connected with the other end of the resistance R52, one end of the resistance R49 is connected with the common ground, the other end of the resistance R49 is respectively connected with the 1-pin of the chip IC3 and the other end of the resistance R46, one end of the capacitor CY1 is connected with the protection ground, the other end of the capacitor CY1 is connected with the common ground.

[0008] As preferred, the first output unit comprises a charging interface TC1, a charging chip IC1, an electrostatic protection ESD4, a MOS tube Q1, a resistor R1, a resistor R2, a resistor R3, a resistor R5, a resistor R7, a resistor R9, a resistor R10, a resistor R13, a resistor R14, a resistor R17, a resistor R18, a resistor R19, a resistor R20, a capacitor C1, a capacitor C2, a capacitor C4, a capacitor C6, a capacitor C8, a capacitor C10, a capacitor C12, a capacitor C14, a capacitor C16, a capacitor C18, a capacitor C19 and a voltage stabilizing diode ESD1, a 1 pin of the MOS tube Q1 is electrically connected with one end of the resistor R2, one end of the capacitor C1, one end of the capacitor C10 and a 15 pin of the chip IC1 respectively, one end of the resistor R2 is connected with VIN, the other end of the resistor R2 is electrically connected with the other end of the capacitor C1 and a 4 pin of the photoelectric coupler U1 respectively, a 3 pin of the photoelectric coupler U1 is electrically connected with one end of the capacitor C8 and a 14 pin of the chip IC1 respectively, a 3 pin of the MOS tube Q1 is electrically connected with one end of the resistor R3, the other end of the resistor R3 is electrically connected with a 2 pin of the chip IC1, a 2 pin of the MOS tube Q1 is electrically connected with one end of the capacitor C4, a 13 pin of the chip IC1, a negative electrode of the voltage stabilizing diode ESD1, one end of the capacitor C2, an A4 pin of the charging interface TC1 and a B4 pin of the charging interface TC1 respectively, the other end of the capacitor C4 is connected with a signal ground, a 12 pin of the chip IC1 is electrically connected with one end of the resistor R1, the other end of the resistor R1 is connected with a signal ground, a 11 pin of the chip IC1 is electrically connected with one end of the resistor R20, a 10 pin of the chip IC1 is electrically connected with one end of the resistor R19, the other end of the resistor R20 is electrically connected with one end of the resistor R18, the other end of the resistor R18 is electrically connected with one end of the resistor R17, one end of the resistor R17 is electrically connected with one end of the capacitor C49, the other end of the resistor R17 is electrically connected with the other end of the resistor R19, a 9 pin of the chip IC1 is electrically connected with one end of the capacitor C6, the other end of the capacitor C6 is electrically connected with one end of the resistor R5 and a 8 pin of the chip IC1 respectively, the other end of the resistor R5 is electrically connected with one end of the resistor R7, an A1 pin of the charging interface TC1, a B1 pin of the charging interface TC1, the other end of the capacitor C2 and a positive electrode of the voltage stabilizing diode ESD1 respectively, the other end of the resistor R7 is electrically connected with a 9 pin of the chip IC1, the other end of the resistor R7 is connected with a signal ground, an A5 pin of the charging interface TC1 is electrically connected with a 1 pin of the electrostatic protection ESD4, an A6 pin of the charging interface TC1 is electrically connected with a B6 pin of the charging interface TC1 and a 4 pin of the electrostatic protection ESD4 respectively, an A7 pin of the charging interface TC1 is electrically connected with a B7 pin of the charging interface TC1 and a 2 pin of the electrostatic protection ESD4 respectively.The B5 pin of the charging interface TC1 is electrically connected with the 5 pin of the electrostatic protection ESD4, the 8 pin of the electrostatic protection ESD4 is electrically connected with the 3 pin of the electrostatic protection ESD4, the 3 pin of the electrostatic protection ESD4 is connected with a signal ground, the other end of the capacitor C10 is respectively electrically connected with the other end of the capacitor C8, the 16 pin of the chip IC1 and the 17 pin of the chip IC1, the other end of the capacitor C10 is connected with a signal ground, the 3 pin of the chip IC1 is electrically connected with one end of the capacitor C12, the other end of the capacitor C12 is connected with a signal ground, the 4 pin of the chip IC1 is respectively electrically connected with one end of the capacitor C19 and one end of the resistor R14, the other end of the capacitor C19 is connected with a signal ground, the other end of the resistor R14 is electrically connected with the 4 pin of the electrostatic protection ESD4, the 5 pin of the chip IC1 is respectively electrically connected with one end of the capacitor C18 and one end of the resistor R13, the other end of the capacitor C18 is connected with a signal ground, the other end of the resistor R13 is electrically connected with the 2 pin of the electrostatic protection ESD4, the 6 pin of the chip IC1 is respectively electrically connected with one end of the capacitor C16 and one end of the resistor R10, the other end of the capacitor C16 is connected with a signal ground, the other end of the resistor R10 is electrically connected with the 5 pin of the electrostatic protection ESD4, the 7 pin of the chip IC1 is respectively electrically connected with one end of the capacitor C14 and one end of the resistor R9, the other end of the capacitor C14 is connected with a signal ground, the other end of the resistor R9 is electrically connected with the 1 pin of the electrostatic protection ESD4.

[0009] As preferred, the second output unit comprises a charging interface TC2, a chip IC2, an electrostatic protection ESD3, a MOS tube Q2, a voltage stabilizing diode ESD2, a resistor R4, a resistor R6, a resistor R8, a resistor R11, a resistor R12, a resistor R15, a resistor R16, a capacitor C3, a capacitor C5, a capacitor C7, a capacitor C11, a capacitor C15, a capacitor C17, a capacitor C20 and a capacitor C21, a 1 pin of the MOS tube Q2 is electrically connected with one end of the capacitor C11 and a 15 pin of the chip IC2 respectively, a 1 pin of the MOS tube Q2 is connected with VIN, a 3 pin of the MOS tube Q2 is electrically connected with one end of the resistor R4, the other end of the resistor R4 is electrically connected with a 2 pin of the chip IC2, the other end of the C11 is electrically connected with one end of a capacitor C9, a 16 pin of the chip IC2 and a 17 pin of the chip IC2 respectively, the other end of the C11 is connected with a signal ground, the other end of the capacitor C9 is electrically connected with a 14 pin of the chip IC2, a 2 pin of the MOS tube Q2 is electrically connected with one end of the capacitor C5, a 13 pin of the chip IC2, a negative pole of the voltage stabilizing diode ESD2, one end of the capacitor C3, an A4 pin of the charging interface TC2 and a B4 pin of the charging interface TC2 respectively, the other end of the capacitor C5 is connected with a signal ground, a 11 pin of the chip IC2 is electrically connected with the other end of a resistor R20, a 10 pin of the chip IC2 is electrically connected with the other end of a resistor R19, a 3 pin of the chip IC2 is electrically connected with one end of a capacitor C13, the other end of the capacitor C13 is connected with a signal ground, a 4 pin of the chip IC2 is electrically connected with one end of a capacitor C21 and one end of a resistor R16 respectively, the other end of the capacitor C21 is connected with a signal ground, the other end of the resistor R16 is electrically connected with a 4 pin of the electrostatic protection ESD3, an A6 pin of the charging interface TC2 and a B6 pin of the charging interface TC2 respectively, a 5 pin of the chip IC2 is electrically connected with one end of a capacitor C20 and one end of a resistor R15 respectively, the other end of the capacitor C20 is connected with a signal ground, the other end of the resistor R15 is electrically connected with a 2 pin of the electrostatic protection ESD3, an A7 pin of the charging interface TC2 and a B7 pin of the charging interface TC2 respectively, a 6 pin of the chip IC2 is electrically connected with one end of a capacitor C17 and one end of a resistor R12 respectively, the other end of the capacitor C17 is connected with a signal ground, the other end of the resistor R12 is electrically connected with a 5 pin of the electrostatic protection ESD3 and a B5 pin of the charging interface TC2 respectively, a 7 pin of the chip IC2 is electrically connected with one end of a capacitor C15 and one end of a resistor R11 respectively, the other end of the capacitor C15 is connected with a signal ground, the other end of the resistor R11 is electrically connected with a 1 pin of the electrostatic protection ESD3 and an A5 pin of the charging interface TC2 respectively, a 9 pin of the chip IC2 is electrically connected with one end of a capacitor C7,The other end of the capacitor C7 is electrically connected with the 8th pin of the chip IC2 and one end of the resistor R6 respectively, the other end of the resistor R6 is electrically connected with one end of the resistor R8, the positive electrode of the voltage stabilizing diode ESD2, the other end of the capacitor C3, the A1 pin of the charging interface TC2 and the B1 pin of the charging interface TC2 respectively, the other end of the resistor R8 is electrically connected with the 9th pin of the chip IC2, the other end of the resistor R8 is connected with the signal ground, the 3rd pin of the electrostatic protection ESD3 is electrically connected with the 8th pin of the electrostatic protection ESD3, the 3rd pin of the electrostatic protection ESD3 is connected with the signal ground.

[0010] As preferred, the control circuit comprises the chip U2, the inductor L1, the MOS Q3, the MOS Q4, the MOS Q5, the MOS Q6, the triode Q7, the polar capacitor C30, the polar capacitor C35, the polar capacitor C37, the capacitor C22, the capacitor C23, the capacitor C24, the capacitor C25, the capacitor C26, the capacitor C27, the capacitor C28, the capacitor C29, the capacitor C31, the capacitor C32, the capacitor C33, the capacitor C34, the capacitor C36, the capacitor C38, the capacitor C39, the capacitor C40, the capacitor C41, the capacitor C42, the resistor R22, the resistor R23, the resistor R24, the resistor R25, the resistor R26, the resistor R27, the resistor R28, the resistor R29, the resistor R30, the resistor R31, the resistor R32, the resistor R33, the resistor R34 and the resistor R35, the positive pole of the polar capacitor C35 is electrically connected with one end of the capacitor C36, one end of the capacitor C34, one end of the capacitor C33, one end of the capacitor C38, one end of the resistor R29, the 20th pin of the chip U2 and the 1st pin of the MOS Q3 respectively, the positive pole of the polar capacitor C35 is connected with VIN, the negative pole of the polar capacitor C35 is electrically connected with the other end of the capacitor C36, the other end of the capacitor C34, the other end of the capacitor C33 and the other end of the capacitor C38 respectively, the other end of the capacitor C34 is connected with signal ground, the other end of the resistor R29 is electrically connected with the 12th pin of the chip IC2 and the 17th pin of the chip U2 respectively, the 3rd pin of the MOS Q3 is electrically connected with the 18th pin of the chip U2, the 2nd pin of the MOS Q3 is electrically connected with one end of the inductor L1, one end of the capacitor C32 and the 14th pin of the chip U2 respectively, the other end of the inductor L1 is electrically connected with the 1st pin of the MOS Q5, one end of the capacitor C24 and the 13th pin of the chip U2 respectively, the other end of the capacitor C24 is electrically connected with one end of the resistor R22, the other end of the resistor R22 is electrically connected with the 8th pin of the chip U2, the 3rd pin of the MOS Q5 is electrically connected with the 9th pin of the chip U2, the 2nd pin of the MOS Q5 is electrically connected with the 7th pin of the chip U2, one end of the resistor R24, the positive pole of the polar capacitor C37, one end of the capacitor C31, one end of the resistor R21, one end of the resistor R28, one end of the capacitor C25, one end of the capacitor C26, one end of the capacitor C27, one end of the capacitor C28, one end of the capacitor C22, one end of the capacitor C23, one end of the capacitor C29, the positive pole of the polar capacitor C30 and the 1st pin of the MOS Q4 respectively, the other end of the resistor R24 is electrically connected with one end of the resistor R25, the other end of the resistor R25 is electrically connected with one end of the resistor R30, one end of the resistor R31 and one end of the resistor R33 respectively, the other end of the resistor R30 is electrically connected with the 4th pin of the chip U2, the other end of the resistor R33 is connected with signal ground, the 16th pin of the chip U2 is electrically connected with one end of the capacitor C39, and the like.The other end of the capacitor C39 is connected to a signal ground, the 6th pin of the chip U2 is respectively connected to one end of a capacitor C41 and one end of a resistor R35, one end of the resistor R35 is connected to a protection ground, the 5th pin of the chip U2 is respectively connected to the other end of the capacitor C41, the other end of the resistor R35, one end of a capacitor C42, the 11th pin of the chip U2 and the 12th pin of the chip U2, the 12th pin of the chip U2 is connected to the signal ground, the other end of the capacitor C42 is connected to the 10th pin of the chip U2, the other end of the resistor R31 is connected to the collector of a transistor Q7, the negative electrode of a polar capacitor C37 is connected to the signal ground, the other end of the capacitor C31 is connected to one end of a resistor R27, the other end of the resistor R27 is respectively connected to the other end of a resistor R21 and the emitter of the transistor Q7, the other end of a resistor R28 is respectively connected to the base of the transistor Q7 and one end of a resistor R34, the other end of the resistor R34 is respectively connected to one end of a capacitor C40 and the 14th pin of a chip IC2, the other end of the capacitor C40 is connected to the signal ground, the other end of a capacitor C25, the other end of a capacitor C26, the other end of a capacitor C27, the other end of a capacitor C28 and the other end of a capacitor C22 are electrically connected, the other end of the capacitor C25 is connected to the signal ground, the other end of a capacitor C23 is respectively connected to the other end of a capacitor C29 and the negative electrode of a polar capacitor C30, the other end of the capacitor C23 is connected to the protection ground, the 2nd pin of a MOS transistor Q4 is connected to one end of a capacitor C3, the 3rd pin of the MOS transistor Q4 is connected to the 2nd pin of a MOS transistor Q6, the 3rd pin of the MOS transistor Q6 is connected to one end of a resistor R26, the other end of the resistor R26 is respectively connected to the 1st pin of the chip IC2 and one end of a resistor R32, the other end of the resistor R32 is connected to the 1st pin of the MOS transistor Q6, one end of the resistor R32 is connected to the signal ground.

[0011] The model of the chip IC1 is SC2151A, the model of the chip IC2 is SC2151A, the model of the chip IC3 is SC3503, the model of the chip IC4 is SC3023C, and the model of the chip U2 is SC8742. Both the charging interface TC1 and the charging interface TC2 are type-c interfaces. The models of the electrostatic protection ESD4 and the electrostatic protection ESD3 are both ESD2404P5P.

[0012] The working control principle of the utility model:

[0013] When charging, first connect the power connector P1 to the three-phase power supply, wherein the live wire L is electrically connected to the 1 pin of the power connector P1, and the zero line N is electrically connected to the 2 pin of the power connector P1, and then the device can be connected to the charging interface TC1 or the charging interface TC1 through the charging line for charging.

[0014] When charging through the charging interface TC1, the power input from the power connector P1 obtains an adjustable output voltage through protocol identification, and the main body controls the voltage conversion of the optocoupler U1 through the protocol chip IC1, so that the output is converted into the required direct current voltage for charging the device.

[0015] When charging through the charging interface TC2, the power obtains an adjustable output voltage through protocol identification, and the main body controls the voltage conversion of the optocoupler U1 through the communication of the protocol chip IC2 and IC1, so that the output is converted into the required direct current voltage for charging the device.

[0016] When charging through the charging interface TC1 and the charging interface TC2 at the same time, the TC1 part obtains an output charging voltage through the voltage conversion of the optocoupler U1 controlled by the protocol chip IC1, and the TC2 part obtains an output voltage through the voltage conversion of the chip U2 through the communication of the protocol chip IC2 and the device through the charging interface TC2, specifically, different voltages are output through the step-up and step-down conversion of the MOS tube Q3, the inductor L1, the MOS tube Q5 and the chip U2, so as to form independent charging of the charging interface TC1 and the charging interface TC2. And the protocol chips IC1 and IC2 judge the charging power by continuously detecting the charging current of the current port, if one of the ports is close to the completion of charging, the charging power is reduced, then the other port provides greater charging power by re-communicating with the device, which greatly improves the charging efficiency, and the two ports are switched with each other, without the need of two groups of same high-power output circuits, which greatly reduces the cost.

[0017] The utility model discloses intelligent charging switching, double -port does not need to distinguish charging power, when charging in two ports, after the equipment removes after any one port is full of electricity, another port can carry out full -power fast charging, need not to replug distinguish charging port, and charging is more convenient, and the charger can intelligently distribute different charging power when charging in two ports, and charging efficiency is greatly improved.

[0018] The utility model discloses two port intelligent switching, relative conventional two -way independent output, reduce port peripheral device, reduce the cost.

[0019] The utility model discloses the following beneficial effects: simple to use, low cost, high charging efficiency. DRAWINGS

[0020] ATTACH Figure 1 It is the schematic diagram of the power supply circuit of the utility model.

[0021] Appendix Figure 2 This is a schematic diagram of the first output unit of this utility model.

[0022] Appendix Figure 3 This is a schematic diagram of the second output unit of this utility model.

[0023] Appendix Figure 4 This is a schematic diagram of the control circuit of this utility model. Detailed Implementation

[0024] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0025] Example: According to the appendix Figure 1 Appendix Figure 2 Appendix Figure 3 and attached Figure 4 To further illustrate this utility model, an example of a dual-port charger intelligent switching circuit includes a power supply circuit. The right side of the power supply circuit is provided with a control circuit, a first output unit, and a second output unit. The control terminals of the first and second output units are electrically connected to the control circuit. The power input terminals of the control circuit, the first output unit, and the second output unit are electrically connected to the output terminal of the power supply circuit.

[0026] The power supply circuit includes power connector P1, chip IC3, chip IC4, rectifier bridge BD1, rectifier bridge BD2, inductor LF1, inductor L2, inductor L3, transformer TR1, polarized capacitor EC1, polarized capacitor EC2, polarized capacitor EC3, polarized capacitor EC4, polarized capacitor EC5, polarized capacitor EC6, polarized capacitor EC7, polarized capacitor EC8, breaker F1, breaker FB1, MOS tube Q8, MOS tube Q9, thermistor NTC1, optocoupler U1, resistor R36, resistor R37, resistor R38, resistor R39, resistor R40, resistor R43, resistor R44, resistor R45, resistor R46, resistor R47, resistor R49, resistor 50, resistor 51, resistor 52, resistor 53, resistor 54, resistor 55, resistor 56, resistor 57, resistor 58, resistor 59, resistor 60, resistor 61, resistor 62, diode D1, diode D2, diode D3, diode D4, diode D5, capacitor CX1, capacitor CY1, capacitor C43, capacitor C44, capacitor C45, capacitor C47, capacitor C48, capacitor C49, capacitor C50, capacitor C51, capacitor C52 and capacitor C53, the 1 pin of the power connector P1 is electrically connected with one end of the breaker F1, the other end of the breaker F1 is electrically connected with one end of the capacitor CX1, one end of the resistor R39 and the 2 pin of the inductor LF1 respectively, the 2 pin of the power connector P1 is electrically connected with the other end of the capacitor CX1, the other end of the resistor R39 and the 3 pin of the inductor LF1 respectively, the 4 pin of the inductor LF1 is electrically connected with the 2 pin of the rectifier bridge BD1, the positive electrode of the diode D3 and the 1 pin of the rectifier bridge BD1 respectively, the 1 pin of the inductor LF1 is electrically connected with the 2 pin of the rectifier bridge BD2, the positive electrode of the diode D4 and the 1 pin of the rectifier bridge BD2 respectively, the 4 pin of the rectifier bridge BD1 is electrically connected with the 4 pin of the rectifier bridge BD2, the negative electrode of the polarized capacitor EC3, the negative electrode of the polarized capacitor EC4, the negative electrode of the polarized capacitor EC5, the negative electrode of the polarized capacitor EC6, the negative electrode of the polarized capacitor EC7 and one end of the capacitor C45 respectively, the negative electrode of the polarized capacitor EC3 is connected with the protection ground, the 3 pin of the rectifier bridge BD1 is electrically connected with the 3 pin of the rectifier bridge BD2, the positive electrode of the polarized capacitor EC3, one end of the inductor L2 and one end of the resistor R36 respectively, the other end of the inductor L2 is electrically connected with the other end of the resistor R36, the positive electrode of the polarized capacitor EC4, the positive electrode of the polarized capacitor EC5, the positive electrode of the polarized capacitor EC6, the positive electrode of the polarized capacitor EC7, the other end of the capacitor C45, one end of the resistor R37, one end of the resistor R38, one end of the capacitor C43 and the 1 pin of the transformer TR1 respectively, the negative electrode of the diode D3 is electrically connected with the negative electrode of the diode D4 and one end of the resistor R50 respectively, the other end of the resistor R50 is electrically connected with one end of the resistor R51,The other end of the resistance R51 is electrically connected with the 10 pin of the chip IC4, the 1 pin of the chip IC4 is electrically connected with one end of the resistance R57, the other end of the resistance R57 is electrically connected with one end of the thermistor NTC1, the other end of the thermistor NTC1 is electrically connected with the 2 pin of the photoelectric coupler U1, one end of the capacitor C51, one end of the resistance R62, one end of the capacitor C52 and one end of the capacitor C53 respectively, the 2 pin of the chip IC4 is electrically connected with one end of the inductor L3, the other end of the inductor L3 is electrically connected with one end of the capacitor C49 and the positive pole of the polar capacitor EC8 respectively, the other end of the capacitor C49 is connected with the protection ground, the 3 pin of the chip IC4 is electrically connected with the 1 pin of the photoelectric coupler U1 and the other end of the capacitor C51 respectively, the 4 pin of the chip IC4 is electrically connected with one end of the resistance R53, the other end of the resistance R62 and the other end of the capacitor C52 respectively, the other end of the resistance R53 is electrically connected with the 4 pin of the transformer TR1, the 5 pin of the chip IC4 is electrically connected with the other end of the capacitor C53 and one end of the resistance R58 respectively, one end of the capacitor C52 is connected with the protection ground, the 6 pin of the chip IC4 is electrically connected with one end of the capacitor C50, the 6 pin of the chip IC4 is connected with the protection ground, the other end of the capacitor C50 is electrically connected with the 8 pin of the chip IC4, the 7 pin of the chip IC4 is electrically connected with the negative pole of the diode D5 and one end of the resistance R55 respectively, the positive pole of the diode D5 is electrically connected with one end of the resistance R54, the other end of the resistance R54 is electrically connected with the other end of the resistance R55, one end of the resistance R56 and the 1 pin of the MOS Q1 respectively, the 3 pin of the MOS Q1 is electrically connected with the other end of the resistance R56, the other end of the resistance R58, one end of the resistance R59, one end of the resistance R60 and one end of the resistance R61 respectively, the other end of the resistance R59 is electrically connected with the other end of the resistance R60 and the other end of the resistance R61 respectively, the other end of the resistance R60 is connected with the protection ground, the 2 pin of the MOS Q1 is electrically connected with one end of the breaker FB1 and one end of the capacitor C48 respectively, the other end of the capacitor C48 is electrically connected with the 3 pin of the MOS Q1, the other end of the resistance R37 is electrically connected with the other end of the resistance R38, the other end of the capacitor C43 and one end of the resistance R45 respectively, the other end of the R45 is electrically connected with the positive pole of the diode D2, the negative pole of the diode D2 is electrically connected with the other end of the breaker FB1 and the 2 pin of the transformer TR1 respectively, the 4 pin of the transformer TR1 is electrically connected with the positive pole of the diode D1, the negative pole of the diode D1 is electrically connected with one end of the resistance R43 and the positive pole of the polar capacitor EC8, the negative pole of the polar capacitor EC8 is connected with the protection ground, the 3 pin of the transformer TR1 is connected with the protection ground,The 5-pin of the transformer TR1 is respectively connected with one end of the resistance R46, the positive pole of the polarity capacitor EC1 and the positive pole of the polarity capacitor EC2, the 5-pin of the transformer TR1 outputs VIN, the 6-pin of the transformer TR1 is respectively connected with the 1-pin of the MOS tube, one end of the capacitor C44 and one end of the resistance R47, the other end of the capacitor C44 is connected with one end of the resistance R40, the other end of the resistance R40 is respectively connected with the 2-pin of the MOS tube, the negative pole of the polarity capacitor EC1 and the negative pole of the polarity capacitor EC2, the negative pole of the polarity capacitor EC2 is connected with the common ground, the other end of the resistance R47 is connected with the 6-pin of the chip IC3, the 5-pin of the chip IC3 is connected with the 3-pin of the MOS tube, the 4-pin of the chip IC3 is connected with one end of the capacitor C47, the other end of the capacitor C47 is respectively connected with one end of the resistance R52, the 2-pin of the chip IC3 and one end of the resistance R49, the 3-pin of the chip IC3 is connected with the other end of the resistance R52, one end of the resistance R49 is connected with the common ground, the other end of the resistance R49 is respectively connected with the 1-pin of the chip IC3 and the other end of the resistance R46, one end of the capacitor CY1 is connected with the protection ground, the other end of the capacitor CY1 is connected with the common ground.

[0027] The first output unit includes a charging interface TC1, a charging chip IC1, an electrostatic protection ESD4, a MOS tube Q1, resistors R1, R2, R3, R5, R7, R9, R10, R13, R14, R17, R18, R19, R20, capacitors C1, C2, C4, C6, C8, C10, C12, C14, C16, C18, C19 and a voltage stabilizing diode ESD1. The 1 pin of the MOS tube Q1 is electrically connected with one end of the resistor R2, one end of the capacitor C1, one end of the capacitor C10 and the 15 pin of the chip IC1. One end of the resistor R2 is connected with VIN. The other end of the resistor R2 is electrically connected with the other end of the capacitor C1 and the 4 pin of the photoelectric coupler U1. The 3 pin of the photoelectric coupler U1 is electrically connected with one end of the capacitor C8 and the 14 pin of the chip IC1. The 3 pin of the MOS tube Q1 is electrically connected with one end of the resistor R3. The other end of the resistor R3 is electrically connected with the 2 pin of the chip IC1. The 2 pin of the MOS tube Q1 is electrically connected with one end of the capacitor C4, the 13 pin of the chip IC1, the negative electrode of the voltage stabilizing diode ESD1, one end of the capacitor C2, the A4 pin of the charging interface TC1 and the B4 pin of the charging interface TC1. The other end of the capacitor C4 is connected with a signal ground. The 12 pin of the chip IC1 is electrically connected with one end of the resistor R1. The other end of the resistor R1 is connected with a signal ground. The 11 pin of the chip IC1 is electrically connected with one end of the resistor R20. The 10 pin of the chip IC1 is electrically connected with one end of the resistor R19. The other end of the resistor R20 is electrically connected with one end of the resistor R18. The other end of the resistor R18 is electrically connected with one end of the resistor R17. One end of the resistor R17 is electrically connected with one end of the capacitor C49. The other end of the resistor R17 is electrically connected with the other end of the resistor R19. The 9 pin of the chip IC1 is electrically connected with one end of the capacitor C6. The other end of the capacitor C6 is electrically connected with one end of the resistor R5 and the 8 pin of the chip IC1. The other end of the resistor R5 is electrically connected with one end of the resistor R7, the A1 pin of the charging interface TC1, the B1 pin of the charging interface TC1, the other end of the capacitor C2 and the positive electrode of the voltage stabilizing diode ESD1. The other end of the resistor R7 is electrically connected with the 9 pin of the chip IC1. The other end of the resistor R7 is connected with a signal ground. The A5 pin of the charging interface TC1 is electrically connected with the 1 pin of the electrostatic protection ESD4. The A6 pin of the charging interface TC1 is electrically connected with the B6 pin of the charging interface TC1 and the 4 pin of the electrostatic protection ESD4. The A7 pin of the charging interface TC1 is electrically connected with the B7 pin of the charging interface TC1 and the 2 pin of the electrostatic protection ESD4.The B5 pin of the charging interface TC1 is electrically connected with the 5 pin of the electrostatic protection ESD4, the 8 pin of the electrostatic protection ESD4 is electrically connected with the 3 pin of the electrostatic protection ESD4, the 3 pin of the electrostatic protection ESD4 is connected with a signal ground, the other end of the capacitor C10 is respectively electrically connected with the other end of the capacitor C8, the 16 pin of the chip IC1 and the 17 pin of the chip IC1, the other end of the capacitor C10 is connected with a signal ground, the 3 pin of the chip IC1 is electrically connected with one end of the capacitor C12, the other end of the capacitor C12 is connected with a signal ground, the 4 pin of the chip IC1 is respectively electrically connected with one end of the capacitor C19 and one end of the resistor R14, the other end of the capacitor C19 is connected with a signal ground, the other end of the resistor R14 is electrically connected with the 4 pin of the electrostatic protection ESD4, the 5 pin of the chip IC1 is respectively electrically connected with one end of the capacitor C18 and one end of the resistor R13, the other end of the capacitor C18 is connected with a signal ground, the other end of the resistor R13 is electrically connected with the 2 pin of the electrostatic protection ESD4, the 6 pin of the chip IC1 is respectively electrically connected with one end of the capacitor C16 and one end of the resistor R10, the other end of the capacitor C16 is connected with a signal ground, the other end of the resistor R10 is electrically connected with the 5 pin of the electrostatic protection ESD4, the 7 pin of the chip IC1 is respectively electrically connected with one end of the capacitor C14 and one end of the resistor R9, the other end of the capacitor C14 is connected with a signal ground, the other end of the resistor R9 is electrically connected with the 1 pin of the electrostatic protection ESD4.

[0028] The second output unit includes a charging interface TC2, a chip IC2, an electrostatic protection ESD3, a MOS tube Q2, a voltage stabilizing diode ESD2, a resistor R4, a resistor R6, a resistor R8, a resistor R11, a resistor R12, a resistor R15, a resistor R16, a capacitor C3, a capacitor C5, a capacitor C7, a capacitor C11, a capacitor C15, a capacitor C17, a capacitor C20 and a capacitor C21. The 1 pin of the MOS tube Q2 is electrically connected with one end of the capacitor C11, the 15 pin of the chip IC2 respectively. The 1 pin of the MOS tube Q2 is connected with VIN. The 3 pin of the MOS tube Q2 is electrically connected with one end of the resistor R4. The other end of the resistor R4 is electrically connected with the 2 pin of the chip IC2. The other end of the C11 is electrically connected with one end of the capacitor C9, the 16 pin of the chip IC2 and the 17 pin of the chip IC2 respectively. The other end of the C11 is connected with a signal ground. The other end of the capacitor C9 is electrically connected with the 14 pin of the chip IC2. The 2 pin of the MOS tube Q2 is electrically connected with one end of the capacitor C5, the 13 pin of the chip IC2, the negative pole of the voltage stabilizing diode ESD2, one end of the capacitor C3, the A4 pin of the charging interface TC2 and the B4 pin of the charging interface TC2 respectively. The other end of the capacitor C5 is connected with a signal ground. The 11 pin of the chip IC2 is electrically connected with the other end of the resistor R20. The 10 pin of the chip IC2 is electrically connected with the other end of the resistor R19. The 3 pin of the chip IC2 is electrically connected with one end of the capacitor C13. The other end of the capacitor C13 is connected with a signal ground. The 4 pin of the chip IC2 is electrically connected with one end of the capacitor C21 and one end of the resistor R16 respectively. The other end of the capacitor C21 is connected with a signal ground. The other end of the resistor R16 is electrically connected with the 4 pin of the electrostatic protection ESD3, the A6 pin of the charging interface TC2 and the B6 pin of the charging interface TC2 respectively. The 5 pin of the chip IC2 is electrically connected with one end of the capacitor C20 and one end of the resistor R15 respectively. The other end of the capacitor C20 is connected with a signal ground. The other end of the resistor R15 is electrically connected with the 2 pin of the electrostatic protection ESD3, the A7 pin of the charging interface TC2 and the B7 pin of the charging interface TC2 respectively. The 6 pin of the chip IC2 is electrically connected with one end of the capacitor C17 and one end of the resistor R12 respectively. The other end of the capacitor C17 is connected with a signal ground. The other end of the resistor R12 is electrically connected with the 5 pin of the electrostatic protection ESD3 and the B5 pin of the charging interface TC2 respectively. The 7 pin of the chip IC2 is electrically connected with one end of the capacitor C15 and one end of the resistor R11 respectively. The other end of the capacitor C15 is connected with a signal ground. The other end of the resistor R11 is electrically connected with the 1 pin of the electrostatic protection ESD3 and the A5 pin of the charging interface TC2 respectively. The 9 pin of the chip IC2 is electrically connected with one end of the capacitor C7.The other end of the capacitor C7 is electrically connected with the 8th pin of the chip IC2 and one end of the resistor R6 respectively, the other end of the resistor R6 is electrically connected with one end of the resistor R8, the positive electrode of the voltage stabilizing diode ESD2, the other end of the capacitor C3, the A1 pin of the charging interface TC2 and the B1 pin of the charging interface TC2 respectively, the other end of the resistor R8 is electrically connected with the 9th pin of the chip IC2, the other end of the resistor R8 is connected with the signal ground, the 3rd pin of the electrostatic protection ESD3 is electrically connected with the 8th pin of the electrostatic protection ESD3, the 3rd pin of the electrostatic protection ESD3 is connected with the signal ground.

[0029] The control circuit includes chip U2, inductor L1, MOS tube Q3, MOS tube Q4, MOS tube Q5, MOS tube Q6, triode Q7, polarity capacitor C30, polarity capacitor C35, polarity capacitor C37, capacitor C22, capacitor C23, capacitor C24, capacitor C25, capacitor C26, capacitor C27, capacitor C28, capacitor C29, capacitor C31, capacitor C32, capacitor C33, capacitor C34, capacitor C36, capacitor C38, capacitor C39, capacitor C40, capacitor C41, capacitor C42, resistor R22, resistor R23, resistor R24, resistor R25, resistor R26, resistor R27, resistor R28, resistor R29, resistor R30, resistor R31, resistor R32, resistor R33, resistor R34 and resistor R35, the positive pole of the polarity capacitor C35 is electrically connected with one end of capacitor C36, one end of capacitor C34, one end of capacitor C33, one end of capacitor C38, one end of resistor R29, 20 pin of chip U2 and 1 pin of MOS tube Q3 respectively, the positive pole of the polarity capacitor C35 is connected with VIN, the negative pole of the polarity capacitor C35 is electrically connected with the other end of capacitor C36, the other end of capacitor C34, the other end of capacitor C33 and the other end of capacitor C38 respectively, the other end of capacitor C34 is connected with signal ground, the other end of resistor R29 is electrically connected with 12 pin of chip IC2 and 17 pin of chip U2 respectively, 3 pin of MOS tube Q3 is electrically connected with 18 pin of chip U2, 2 pin of MOS tube Q3 is electrically connected with one end of inductor L1, one end of capacitor C32 and 14 pin of chip U2 respectively, the other end of inductor L1 is electrically connected with 1 pin of MOS tube Q5, one end of capacitor C24 and 13 pin of chip U2 respectively, the other end of capacitor C24 is electrically connected with one end of resistor R22, the other end of resistor R22 is electrically connected with 8 pin of chip U2, 3 pin of MOS tube Q5 is electrically connected with 9 pin of chip U2, 2 pin of MOS tube Q5 is electrically connected with 7 pin of chip U2, one end of resistor R24, positive pole of polarity capacitor C37, one end of capacitor C31, one end of resistor R21, one end of resistor R28, one end of capacitor C25, one end of capacitor C26, one end of capacitor C27, one end of capacitor C28, one end of capacitor C22, one end of capacitor C23, one end of capacitor C29, positive pole of polarity capacitor C30 and 1 pin of MOS tube Q4 respectively, the other end of resistor R24 is electrically connected with one end of resistor R25, the other end of resistor R25 is electrically connected with one end of resistor R30, one end of resistor R31 and one end of resistor R33 respectively, the other end of resistor R30 is electrically connected with 4 pin of chip U2, the other end of resistor R33 is connected with signal ground, 16 pin of chip U2 is electrically connected with one end of capacitor C39,The other end of the capacitor C39 is connected to a signal ground, the 6th pin of the chip U2 is respectively connected to one end of the capacitor C41 and one end of the resistor R35, one end of the resistor R35 is connected to a protection ground, the 5th pin of the chip U2 is respectively connected to the other end of the capacitor C41, the other end of the resistor R35, one end of the capacitor C42, the 11th pin of the chip U2 and the 12th pin of the chip U2, the 12th pin of the chip U2 is connected to the signal ground, the other end of the capacitor C42 is connected to the 10th pin of the chip U2, the other end of the resistor R31 is connected to the collector of the transistor Q7, the negative electrode of the polar capacitor C37 is connected to the signal ground, the other end of the capacitor C31 is connected to one end of the resistor R27, the other end of the resistor R27 is respectively connected to the other end of the resistor R21 and the emitter of the transistor Q7, the other end of the resistor R28 is respectively connected to the base of the transistor Q7 and one end of the resistor R34, the other end of the resistor R34 is respectively connected to one end of the capacitor C40 and the 14th pin of the chip IC2, the other end of the capacitor C40 is connected to the signal ground, the other end of the capacitor C25, the other end of the capacitor C26, the other end of the capacitor C27, the other end of the capacitor C28 and the other end of the capacitor C22 are electrically connected, the other end of the capacitor C25 is connected to the signal ground, the other end of the capacitor C23 is respectively connected to the other end of the capacitor C29 and the negative electrode of the polar capacitor C30, the other end of the capacitor C23 is connected to the protection ground, the 2nd pin of the MOS transistor Q4 is connected to one end of the capacitor C3, the 3rd pin of the MOS transistor Q4 is connected to the 2nd pin of the MOS transistor Q6, the 3rd pin of the MOS transistor Q6 is connected to one end of the resistor R26, the other end of the resistor R26 is respectively connected to the 1st pin of the chip IC2 and one end of the resistor R32, the other end of the resistor R32 is connected to the 1st pin of the MOS transistor Q6, one end of the resistor R32 is connected to the signal ground.

[0030] The above merely describes specific embodiments of the present application, but the structural features of the present application are not limited thereto, and any person skilled in the art can make changes or modifications in the field of the present application, which are all covered in the patent range of the present application.

Claims

1. A dual port charger intelligent switching circuit comprising a power supply circuit, characterized in that, The power supply circuit right side is equipped with control circuit, output unit and output unit respectively, control end and output unit of the control end of output unit respectively with control circuit electric connection, the power input end of control circuit, power input end and power input end of output unit of output unit respectively with power supply circuit output electric connection;The output unit includes charging interface TC1, charging chip IC1, static protection ESD4, MOS tube Q1, resistance R1, resistance R2, resistance R3, resistance R5, resistance R7, resistance R9, resistance R10, resistance R13, resistance R14, resistance R17, resistance R18, resistance R19, resistance R20, capacitor C1, capacitor C2, capacitor C4, capacitor C6, capacitor C8, capacitor C10, capacitor C12, capacitor C14, capacitor C16, capacitor C18, capacitor C19 and voltage stabilizing diode ESD1, the 1 pin of MOS tube Q1 is electrically connected with one end of resistance R2, one end of capacitor C1, one end of capacitor C10 and 15 pin of chip IC1 respectively;The output unit includes charging interface TC2, chip IC2, static protection ESD3, MOS tube Q2, voltage stabilizing diode ESD2, resistance R4, resistance R6, resistance R8, resistance R11, resistance R12, resistance R15, resistance R16, capacitor C3, capacitor C5, capacitor C7, capacitor C11, capacitor C15, capacitor C17, capacitor C20 and capacitor C21, the 1 pin of MOS tube Q2 is electrically connected with one end of capacitor C11 and 15 pin of chip IC2 respectively;The control circuit includes chip U2, inductance L1, MOS tube Q3, MOS tube Q4, MOS tube Q5, MOS tube Q6, triode Q7, polarity capacitor C30, polarity capacitor C35, polarity capacitor C37, capacitor C22, capacitor C23, capacitor C24, capacitor C25, capacitor C26, capacitor C27, capacitor C28, capacitor C29, capacitor C31, capacitor C32, capacitor C33, capacitor C34, capacitor C36, capacitor C38, capacitor C39, capacitor C40, capacitor C41, capacitor C42, resistance R22, resistance R23, resistance R24, resistance R25, resistance R26, resistance R27, resistance R28, resistance R29, resistance R30, resistance R31, resistance R32, resistance R33, resistance R34 and resistance R35.

2. The dual port charger intelligent switching circuit according to claim 1, wherein, The power supply circuit includes power connection P1, chip IC3, chip IC4, rectifier bridge BD1, rectifier bridge BD2, inductor LF1, inductor L2, inductor L3, transformer TR1, polarity capacitor EC1, polarity capacitor EC2, polarity capacitor EC3, polarity capacitor EC4, polarity capacitor EC5, polarity capacitor EC6, polarity capacitor EC7, polarity capacitor EC8, breaker F1, breaker FB1, MOS tube Q8, MOS tube Q9, thermistor NTC1, optocoupler U1, resistor R36, resistor R37, resistor R38, resistor R39, resistor R40, resistor R43, resistor R44, resistor R45, resistor R46, resistor R47, resistor R49, resistor 50, resistor 51, resistor 52, resistor 53, resistor 54, resistor 55, resistor 56, resistor 57, resistor 58, resistor 59, resistor 60, resistor 61, resistor 62, diode D1, diode D2, diode D3, diode D4, diode D5, capacitor CX1, capacitor CY1, capacitor C43, capacitor C44, capacitor C45, capacitor C47, capacitor C48, capacitor C49, capacitor C50, capacitor C51, capacitor C52, and capacitor C53.

3. The dual port charger intelligent switching circuit according to claim 2, wherein, The 1 pin of the power connector P1 is electrically connected with one end of the circuit breaker F1, the other end of the circuit breaker F1 is electrically connected with one end of the capacitor CX1, one end of the resistor R39 and the 2 pin of the inductor LF1 respectively, the 2 pin of the power connector P1 is electrically connected with the other end of the capacitor CX1, the other end of the resistor R39 and the 3 pin of the inductor LF1 respectively, the 4 pin of the inductor LF1 is electrically connected with the 2 pin of the rectifier bridge BD1, the positive electrode of the diode D3 and the 1 pin of the rectifier bridge BD1 respectively, the 1 pin of the inductor LF1 is electrically connected with the 2 pin of the rectifier bridge BD2, the positive electrode of the diode D4 and the 1 pin of the rectifier bridge BD2 respectively, the 4 pin of the rectifier bridge BD1 is electrically connected with the 4 pin of the rectifier bridge BD2, the negative electrode of the polarity capacitor EC3, the negative electrode of the polarity capacitor EC4, the negative electrode of the polarity capacitor EC5, the negative electrode of the polarity capacitor EC6, the negative electrode of the polarity capacitor EC7 and one end of the capacitor C45 respectively, the negative electrode of the polarity capacitor EC3 is connected with the protection ground, the 3 pin of the rectifier bridge BD1 is electrically connected with the 3 pin of the rectifier bridge BD2, the positive electrode of the polarity capacitor EC3, one end of the inductor L2 and one end of the resistor R36 respectively, the other end of the inductor L2 is electrically connected with the other end of the resistor R36, the positive electrode of the polarity capacitor EC4, the positive electrode of the polarity capacitor EC5, the positive electrode of the polarity capacitor EC6, the positive electrode of the polarity capacitor EC7, the other end of the capacitor C45, one end of the resistor R37, one end of the resistor R38, one end of the capacitor C43 and the 1 pin of the transformer TR1 respectively, the negative electrode of the diode D3 is electrically connected with the negative electrode of the diode D4 and one end of the resistor R50 respectively, the other end of the resistor R50 is electrically connected with one end of the resistor R51, the other end of the resistor R51 is electrically connected with the 10 pin of the chip IC4, the 1 pin of the chip IC4 is electrically connected with one end of the resistor R57, the other end of the resistor R57 is electrically connected with one end of the thermistor NTC1, the other end of the thermistor NTC1 is electrically connected with the 2 pin of the photoelectric coupling U1, one end of the capacitor C51, one end of the resistor R62, one end of the capacitor C52 and one end of the capacitor C53 respectively, the 2 pin of the chip IC4 is electrically connected with one end of the inductor L3, the other end of the inductor L3 is electrically connected with one end of the capacitor C49 and the positive electrode of the polarity capacitor EC8 respectively, the other end of the capacitor C49 is connected with the protection ground, the 3 pin of the chip IC4 is electrically connected with the 1 pin of the photoelectric coupling U1 and the other end of the capacitor C51 respectively, the 4 pin of the chip IC4 is electrically connected with one end of the resistor R53, the other end of the resistor R62 and the other end of the capacitor C52 respectively, the other end of the resistor R53 is electrically connected with the 4 pin of the transformer TR1, the 5 pin of the chip IC4 is electrically connected with the other end of the capacitor C53 and one end of the resistor R58 respectively, one end of the capacitor C52 is connected with the protection ground.The 6-pin of the chip IC4 is electrically connected with one end of the capacitor C50, the 6-pin of the chip IC4 is connected with the protection ground, the other end of the capacitor C50 is electrically connected with the 8-pin of the chip IC4, the 7-pin of the chip IC4 is electrically connected with the negative pole of the diode D5 and one end of the resistor R55 respectively, the positive pole of the diode D5 is electrically connected with one end of the resistor R54, the other end of the resistor R54 is electrically connected with the other end of the resistor R55, one end of the resistor R56 and the 1-pin of the MOS tube Q1 respectively, the 3-pin of the MOS tube Q1 is electrically connected with the other end of the resistor R56, the other end of the resistor R58, one end of the resistor R59, one end of the resistor R60 and one end of the resistor R61 respectively, the other end of the resistor R59 is electrically connected with the other end of the resistor R60 and the other end of the resistor R61 respectively, the other end of the resistor R60 is connected with the protection ground, the 2-pin of the MOS tube Q1 is electrically connected with one end of the breaker FB1 and one end of the capacitor C48 respectively, the other end of the capacitor C48 is electrically connected with the 3-pin of the MOS tube Q1, the other end of the resistor R37 is electrically connected with the other end of the resistor R38, the other end of the capacitor C43 and one end of the resistor R45 respectively, the other end of the R45 is electrically connected with the positive pole of the diode D2, the negative pole of the diode D2 is electrically connected with the other end of the breaker FB1 and the 2-pin of the transformer TR1 respectively, the 4-pin of the transformer TR1 is electrically connected with the positive pole of the diode D1, the negative pole of the diode D1 is electrically connected with one end of the resistor R43 and the positive pole of the polarity capacitor EC8, the negative pole of the polarity capacitor EC8 is connected with the protection ground, the 3-pin of the transformer TR1 is connected with the protection ground, the 5-pin of the transformer TR1 is electrically connected with one end of the resistor R46, the positive pole of the polarity capacitor EC1 and the positive pole of the polarity capacitor EC2 respectively, the 5-pin of the transformer TR1 outputs VIN, the 6-pin of the transformer TR1 is electrically connected with the 1-pin of the MOS tube, one end of the capacitor C44 and one end of the resistor R47 respectively, the other end of the capacitor C44 is electrically connected with one end of the resistor R40, the other end of the resistor R40 is electrically connected with the 2-pin of the MOS tube, the negative pole of the polarity capacitor EC1 and the negative pole of the polarity capacitor EC2 respectively, the negative pole of the polarity capacitor EC2 is connected with the common ground, the other end of the resistor R47 is electrically connected with the 6-pin of the chip IC3, the 5-pin of the chip IC3 is electrically connected with the 3-pin of the MOS tube, the 4-pin of the chip IC3 is electrically connected with one end of the capacitor C47, the other end of the capacitor C47 is electrically connected with one end of the resistor R52, the 2-pin of the chip IC3 and one end of the resistor R49 respectively, the 3-pin of the chip IC3 is electrically connected with the other end of the resistor R52, one end of the resistor R49 is connected with the common ground, the other end of the resistor R49 is electrically connected with the 1-pin of the chip IC3 and the other end of the resistor R46 respectively.One end of the capacitor CY1 is connected to the protection ground, and the other end of the capacitor CY1 is connected to the common ground.

4. The dual port charger intelligent switching circuit of claim 1, wherein, One end of the resistance R2 is connected with VIN, the other end of the resistance R2 is respectively connected with the other end of the capacitor C1 and the 4th pin of the optocoupler U1, the 3rd pin of the optocoupler U1 is respectively connected with one end of the capacitor C8 and the 14th pin of the chip IC1, the 3rd pin of the MOS Q1 is connected with one end of the resistance R3, the other end of the resistance R3 is connected with the 2nd pin of the chip IC1, the 2nd pin of the MOS Q1 is respectively connected with one end of the capacitor C4, the 13th pin of the chip IC1, the negative electrode of the voltage stabilizing diode ESD1, one end of the capacitor C2, the A4th pin of the charging interface TC1 and the B4th pin of the charging interface TC1, the other end of the capacitor C4 is connected with signal ground, one end of the resistance R1 is connected with the 12th pin of the chip IC1, the other end of the resistance R1 is connected with signal ground, one end of the resistance R20 is connected with the 11th pin of the chip IC1, one end of the resistance R19 is connected with the 10th pin of the chip IC1, the other end of the resistance R20 is connected with one end of the resistance R18, the other end of the resistance R18 is connected with one end of the resistance R17, one end of the resistance R17 is connected with one end of the capacitor C49, the other end of the resistance R17 is connected with the other end of the resistance R19, the 9th pin of the chip IC1 is connected with one end of the capacitor C6, the other end of the capacitor C6 is respectively connected with one end of the resistance R5 and the 8th pin of the chip IC1, the other end of the resistance R5 is respectively connected with one end of the resistance R7, the A1th pin of the charging interface TC1, the B1th pin of the charging interface TC1, the other end of the capacitor C2 and the positive electrode of the voltage stabilizing diode ESD1, the other end of the resistance R7 is connected with the 9th pin of the chip IC1, the other end of the resistance R7 is connected with signal ground, the A5th pin of the charging interface TC1 is connected with the 1st pin of the electrostatic protection ESD4, the A6th pin of the charging interface TC1 is respectively connected with the B6th pin of the charging interface TC1 and the 4th pin of the electrostatic protection ESD4, the A7th pin of the charging interface TC1 is respectively connected with the B7th pin of the charging interface TC1 and the 2nd pin of the electrostatic protection ESD4, the B5th pin of the charging interface TC1 is connected with the 5th pin of the electrostatic protection ESD4, the 8th pin of the electrostatic protection ESD4 is connected with the 3rd pin of the electrostatic protection ESD4, the 3rd pin of the electrostatic protection ESD4 is connected with signal ground, the other end of the capacitor C10 is respectively connected with the other end of the capacitor C8, the 16th pin of the chip IC1 and the 17th pin of the chip IC1, the other end of the capacitor C10 is connected with signal ground, the 3rd pin of the chip IC1 is connected with one end of the capacitor C12, the other end of the capacitor C12 is connected with signal ground, the 4th pin of the chip IC1 is respectively connected with one end of the capacitor C19 and one end of the resistance R14, the other end of the capacitor C19 is connected with signal ground,The other end of the resistor R14 is electrically connected with the 4th pin of the electrostatic protection ESD4, the 5th pin of the chip IC1 is electrically connected with one end of the capacitor C18 and one end of the resistor R13 respectively, the other end of the capacitor C18 is connected with the signal ground, the other end of the resistor R13 is electrically connected with the 2nd pin of the electrostatic protection ESD4, the 6th pin of the chip IC1 is electrically connected with one end of the capacitor C16 and one end of the resistor R10 respectively, the other end of the capacitor C16 is connected with the signal ground, the other end of the resistor R10 is electrically connected with the 5th pin of the electrostatic protection ESD4, the 7th pin of the chip IC1 is electrically connected with one end of the capacitor C14 and one end of the resistor R9 respectively, the other end of the capacitor C14 is connected with the signal ground, the other end of the resistor R9 is electrically connected with the 1st pin of the electrostatic protection ESD4.

5. The dual port charger intelligent switching circuit of claim 1, wherein, Anode of the voltage stabilizing diode ESD2, one end of the capacitor C3, A4 pin of the charging interface TC2 and B4 pin of the charging interface TC2 are electrically connected with the 2 pin of the MOS transistor Q2 respectively, the other end of the capacitor C5 is connected with the signal ground, the 11 pin of the chip IC2 is electrically connected with the other end of the resistor R20, the 10 pin of the chip IC2 is electrically connected with the other end of the resistor R19, the 3 pin of the chip IC2 is electrically connected with one end of the capacitor C13, the other end of the capacitor C13 is connected with the signal ground, the 4 pin of the chip IC2 is electrically connected with one end of the capacitor C21 and one end of the resistor R16 respectively, the other end of the capacitor C21 is connected with the signal ground, the other end of the resistor R16 is electrically connected with the 4 pin of the electrostatic protection ESD3, A6 pin of the charging interface TC2 and B6 pin of the charging interface TC2 respectively, the 5 pin of the chip IC2 is electrically connected with one end of the capacitor C20 and one end of the resistor R15 respectively, the other end of the capacitor C20 is connected with the signal ground, the other end of the resistor R15 is electrically connected with the 2 pin of the electrostatic protection ESD3, A7 pin of the charging interface TC2 and B7 pin of the charging interface TC2 respectively, the 6 pin of the chip IC2 is electrically connected with one end of the capacitor C17 and one end of the resistor R12 respectively, the other end of the capacitor C17 is connected with the signal ground, the other end of the resistor R12 is electrically connected with the 5 pin of the electrostatic protection ESD3 and B5 pin of the charging interface TC2 respectively, the 7 pin of the chip IC2 is electrically connected with one end of the capacitor C15 and one end of the resistor R11 respectively, the other end of the capacitor C15 is connected with the signal ground, the other end of the resistor R11 is electrically connected with the 1 pin of the electrostatic protection ESD3 and A5 pin of the charging interface TC2 respectively, the 9 pin of the chip IC2 is electrically connected with one end of the capacitor C7, the other end of the capacitor C7 is electrically connected with the 8 pin of the chip IC2 and one end of the resistor R6 respectively, the other end of the resistor R6 is electrically connected with one end of the resistor R8, anode of the voltage stabilizing diode ESD2, the other end of the capacitor C3, A1 pin of the charging interface TC2 and B1 pin of the charging interface TC2 respectively, the other end of the resistor R8 is electrically connected with the 9 pin of the chip IC2, the other end of the resistor R8 is connected with the signal ground, the 3 pin of the electrostatic protection ESD3 is electrically connected with the 8 pin of the electrostatic protection ESD3.The static protection ESD3 is connected to the signal ground through the 3 pins.

6. The dual port charger intelligent switching circuit of claim 1, wherein, The positive pole of the polar capacitor C35 is electrically connected with one end of the capacitor C36, one end of the capacitor C34, one end of the capacitor C33, one end of the capacitor C38, one end of the resistor R29, 20th pin of the chip U2 and 1st pin of the MOS Q3 respectively, the positive pole of the polar capacitor C35 is connected with VIN, the negative pole of the polar capacitor C35 is electrically connected with the other end of the capacitor C36, the other end of the capacitor C34, the other end of the capacitor C33 and the other end of the capacitor C38 respectively, the other end of the capacitor C34 is connected with signal ground, the other end of the resistor R29 is electrically connected with 12th pin of the chip IC2 and 17th pin of the chip U2 respectively, 3rd pin of the MOS Q3 is electrically connected with 18th pin of the chip U2, 2nd pin of the MOS Q3 is electrically connected with one end of the inductor L1, one end of the capacitor C32 and 14th pin of the chip U2 respectively, the other end of the inductor L1 is electrically connected with 1st pin of the MOS Q5, one end of the capacitor C24 and 13th pin of the chip U2 respectively, the other end of the capacitor C24 is electrically connected with one end of the resistor R22, the other end of the resistor R22 is electrically connected with 8th pin of the chip U2, 3rd pin of the MOS Q5 is electrically connected with 9th pin of the chip U2, 2nd pin of the MOS Q5 is electrically connected with 7th pin of the chip U2, one end of the resistor R24, positive pole of the polar capacitor C37, one end of the capacitor C31, one end of the resistor R21, one end of the resistor R28, one end of the capacitor C25, one end of the capacitor C26, one end of the capacitor C27, one end of the capacitor C28, one end of the capacitor C22, one end of the capacitor C23, one end of the capacitor C29, positive pole of the polar capacitor C30 and 1st pin of the MOS Q4 respectively, the other end of the resistor R24 is electrically connected with one end of the resistor R25, the other end of the resistor R25 is electrically connected with one end of the resistor R30, one end of the resistor R31 and one end of the resistor R33 respectively, the other end of the resistor R30 is electrically connected with 4th pin of the chip U2, the other end of the resistor R33 is connected with signal ground, 16th pin of the chip U2 is electrically connected with one end of the capacitor C39, the other end of the capacitor C39 is connected with signal ground, 6th pin of the chip U2 is electrically connected with one end of the capacitor C41 and one end of the resistor R35 respectively, one end of the resistor R35 is connected with protection ground, 5th pin of the chip U2 is electrically connected with the other end of the capacitor C41, the other end of the resistor R35, one end of the capacitor C42, 11th pin of the chip U2 and 12th pin of the chip U2 respectively, 12th pin of the chip U2 is connected with signal ground, the other end of the capacitor C42 is electrically connected with 10th pin of the chip U2, the other end of the resistor R31 is electrically connected with the collector of the transistor Q7, the negative pole of the polar capacitor C37 is connected with signal ground, the other end of the capacitor C31 is electrically connected with one end of the resistor R27, and the like.The other end of the resistance R27 is electrically connected with the other end of the resistance R21 and the emitter of the triode Q7 respectively, the other end of the resistance R28 is electrically connected with the base of the triode Q7 and the one end of the resistance R34 respectively, the other end of the resistance R34 is electrically connected with the one end of the capacitor C40 and the 14 pin of the chip IC2 respectively, the other end of the capacitor C40 is connected with the signal ground, the other end of the capacitor C25, the other end of the capacitor C26, the other end of the capacitor C27, the other end of the capacitor C28 and the other end of the capacitor C22 are electrically connected, the other end of the capacitor C25 is connected with the signal ground, the other end of the capacitor C23 is electrically connected with the other end of the capacitor C29 and the negative pole of the polar capacitor C30 respectively, the other end of the capacitor C23 is connected with the protection ground, the 2 pin of the MOS Q4 is electrically connected with the one end of the capacitor C3, the 3 pin of the MOS Q4 is electrically connected with the 2 pin of the MOS Q6, the 3 pin of the MOS Q6 is electrically connected with the one end of the resistance R26, the other end of the resistance R26 is electrically connected with the 1 pin of the chip IC2 and the one end of the resistance R32 respectively, the other end of the resistance R32 is electrically connected with the 1 pin of the MOS Q6, the one end of the resistance R32 is connected with the signal ground.

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