CN220628915U

CN220628915U - Power supply circuit for charging control

Info

Publication number: CN220628915U
Application number: CN202322178199.4U
Authority: CN
Inventors: 禤品波; 刘棠良; 郭修根
Original assignee: Jiangxi Ji'an Aohai Technology Co ltd
Current assignee: Jiangxi Ji'an Aohai Technology Co ltd
Priority date: 2023-08-14
Filing date: 2023-08-14
Publication date: 2024-03-19
Anticipated expiration: 2033-08-14

Abstract

The utility model discloses a power supply circuit for charging control, which comprises a main control circuit, a fast full control circuit and a low-voltage charging circuit, wherein the fast full control circuit is also provided with an output control circuit, the main control circuit and the fast full control circuit are mutually matched, the first MOS tube of a main control chip arranged in the main control circuit is used for carrying out on-off control so as to transform the fast full control circuit connected with the main control circuit, the other end of the main control circuit is also provided with a plurality of low-voltage charging circuits, each low-voltage charging circuit can synchronously carry out low-voltage output, the main control chip is matched with a sub-control chip arranged in the fast full control circuit to synchronously carry out voltage conversion, and current can not be communicated through an inductor at one side of the main control chip while flowing in from the other end of the main control chip, so that the processing process of high-voltage and low-voltage conversion can be quickly switched, thereby further improving the voltage conversion efficiency in the power supply circuit.

Description

Power supply circuit for charging control

Technical Field

The utility model relates to the technical field of circuits, in particular to a power supply circuit for charging control.

Background

With the rapid development of industrial manufacturing, the requirement on the charging efficiency of the charger is higher and higher, because the existing single-port or multi-port charger adopts one-stage or multi-stage DC-DC BOST to boost or buck to repeatedly carry out rapid charging on the mobile phone and other electronic products in the using process, the DC-DC BOST in the charging process can generate additional electricity consumption when carrying out low-voltage work along with the time lapse when carrying out charging on the mobile phone and other electronic products, the electricity conversion rate is reduced when further carrying out charging on the mobile phone and other electronic products, the charging process is slow, the existing multi-port output charger product only adopts one-stage or multi-stage DC BOST and buck conversion circuits, and the problem that the charging conversion efficiency in the charging process of the existing power supply circuit in the market is lower is solved when all the rated voltages of the adaptive charger (for example, 5V, 9V, 12V, 15V, 20V and 3.3V-21 are all needed to carry out rapid conversion through the DC-DC BOST.

Disclosure of Invention

The utility model discloses a power supply circuit for charging control, which aims to solve the problem that the existing power supply circuit has lower conversion efficiency of charging efficiency in the charging process.

A power supply circuit for charge control, wherein the power supply circuit comprises: the system comprises a main control circuit, a fast full control circuit and a low-voltage charging circuit, wherein the fast full control circuit and the low-voltage charging circuit are connected with the main control circuit;

the master control circuit includes: the device comprises a main control chip, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a first resistor, a second resistor, a third resistor and a first MOS tube; the connection point between the main control circuit and the quick and sufficient control circuit is used as a circuit starting point, the VIN port of the main control chip is simultaneously connected with the first connection end of the quick and sufficient control circuit and the drain electrode of the first MOS tube, the grid electrode of the first MOS tube is connected with the first connection end of the branch control chip arranged on the quick and sufficient control circuit, the source electrode of the first MOS tube is connected with the first connection end of the low-voltage charging circuit, one end of the first capacitor, one end of the second capacitor and one end of the third capacitor are connected in series with the connection point between the main control chip and the quick and sufficient control circuit, the other end of the first capacitor, the other end of the second capacitor and the other end of the third capacitor are simultaneously grounded, the MODE port of the main control chip is connected with one end of the first resistor, the VCC port of the main control chip is connected with the fourth capacitor, the FREQ port of the main control chip is connected with one end of the second resistor, the PWR port of the main control chip is connected with one end of the third resistor, and the other end of the third resistor, the other end of the fourth capacitor, and the other end of the third resistor are connected with the other end of the fourth resistor and the third resistor.

The protection circuit includes: the device comprises a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, a fifth capacitor, a sixth capacitor, a seventh capacitor, an eighth capacitor and an inductor, wherein an SW1 port of a main control chip is simultaneously connected with one end of the inductor and one end of the fourth resistor, the other end of the fourth resistor is connected with one end of the sixth capacitor, the other end of the sixth capacitor is grounded, the fifth capacitor is connected in series between an SW2 port of the main control chip and a BOOT port of the main control chip, the other end of the inductor is simultaneously connected with a VOUT port of the main control chip, one end of the fifth resistor, one end of the seventh capacitor, one end of the eighth capacitor and a first connecting end of a fast and full control circuit, the FB port of the main control chip is simultaneously connected with one end of the sixth resistor, the other end of the seventh resistor and one end of the seventh capacitor, and the other end of the seventh resistor are simultaneously connected with the other end of the eighth capacitor and one grounding end.

The power supply circuit for charging control, wherein the AGND port of the main control chip, the PGND port of the main control chip, the SNS2P port of the main control chip, the SNSN port of the main control chip and the SNS1P port of the main control chip are all grounded.

The power supply circuit for charging control, wherein the fast full control circuit comprises: the CSN1 port of the sub-control chip is simultaneously connected with the source electrode of the second MOS tube, one end of the ninth capacitor, one end of the tenth capacitor, one end of the eleventh capacitor and one end of the eighth resistor, the twelfth capacitor is arranged in parallel between the CSN1 port of the sub-control chip and the CSP1 port, the CSP1 port of the sub-control chip is connected with one end of the tenth resistor, the other end of the tenth resistor is simultaneously connected with the other end of the eighth resistor, the drain electrode of the second MOS tube is connected with the drain electrode of the third MOS tube, and the connection point between the second MOS tube and the third MOS tube is connected with the first connection end of the main control circuit, the other end of the ninth capacitor, the other end of the tenth capacitor and the other end of the eighth resistor are all arranged in parallel between the CSN1 port of the sub-control chip and the CSP1 port of the CSP, the CSP1 port of the sub-control chip is connected with the drain electrode of the third MOS tube, the drain electrode of the second MOS tube is connected with the drain electrode of the third MOS tube, and the connection point between the third MOS tube is connected with the drain electrode of the first MOS tube, and the drain electrode of the third MOS tube is connected with the drain electrode of the first MOS tube.

The power supply circuit for charging control, wherein a transformer is connected in series between the second MOS tube and the third MOS tube, one end of the transformer is connected with the drain electrode of the second MOS tube, and the other end of the transformer is connected with the drain electrode of the third MOS tube.

The power supply circuit for charging control, wherein, the first connecting end of the fast full control circuit is also connected with an output control circuit, and the output control circuit comprises: an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, an eighteenth resistor, a nineteenth resistor, a twentieth resistor, a fourteenth capacitor, a fifteenth capacitor, a sixteenth capacitor, a seventeenth capacitor, a eighteenth capacitor, a nineteenth capacitor, a twentieth capacitor, a twenty first capacitor, a light emitting diode, a CMPV port of the minute control chip is connected to one end of the eleventh resistor, the other end of the eleventh resistor is connected to one end of the fourteenth capacitor, the other end of the fourteenth capacitor is simultaneously connected to one end of the twelfth resistor, a negative electrode of the light emitting diode, the other end of the fifteenth capacitor and a FB port of the minute control chip, a positive electrode of the light emitting diode is simultaneously connected to one end of the master control circuit and the other end of the twelfth resistor, a VOUT2 port of the minute control chip is connected to one end of the thirteenth resistor, the other end of the thirteenth resistor is connected to one end of the low-voltage charging circuit, the other end of the eleventh resistor is connected to one end of the minute control chip, the other end of the seventeenth resistor is simultaneously connected to the seventeenth port of the minute control chip, the seventeenth resistor is simultaneously connected to the one end of the seventeenth resistor of the minute control chip, the seventeenth resistor is connected to the other end of the minute control chip, and the seventeenth resistor is connected to the other end of the minute control chip is connected to the power supply, and the seventeenth resistor is connected to the one end of the fifth resistor of the minute control chip is connected to the fifth resistor, the other end of the seventeenth resistor is connected with the B6 port of the sub-control chip, the DM port of the sub-control chip is simultaneously connected with one end of the eighteenth resistor and one end of the nineteenth capacitor, the other end of the eighteenth resistor is connected with the A7 port of the sub-control chip, the VCC port of the sub-control chip is connected with one end of the twentieth capacitor, the VIN port of the sub-control chip is simultaneously connected with one end of the nineteenth resistor and one end of the twentieth capacitor, the other end of the nineteenth resistor is grounded, and the other end of the sixteenth capacitor, the other end of the seventeenth capacitor, the other end of the eighteenth capacitor, the other end of the nineteenth capacitor, the other end of the twentieth capacitor and the GND port of the sub-control chip are all connected with the grounding end of the twentieth resistor.

The power supply circuit for charging control, wherein the low-voltage charging circuit comprises: the second power chip, the switch control chip, the twenty-second capacitor, the twenty-third capacitor, the twenty-fourth capacitor, the twenty-first resistor, the first zener diode and the second zener diode; the VIN port of the switch control chip is simultaneously connected with one end of the main control circuit and one end of the twenty-second capacitor, the ISET port of the switch control chip is simultaneously connected with one end of the twenty-first resistor and one end of the twenty-third capacitor, the other end of the twenty-second capacitor, the other end of the twenty-first resistor, the other end of the twenty-third capacitor and the GND end of the switch control chip are grounded, the VOUT port of the switch control chip is simultaneously connected with the A4 end of the second power chip and one end of the twenty-fourth capacitor, the other end of the twenty-fourth capacitor is grounded, the CC2 port of the switch control chip is simultaneously connected with the cathode of the first voltage stabilizing diode, the anode of the first voltage stabilizing diode is simultaneously connected with the A1 end of the second power chip, the other end of the twenty-second capacitor, the other end of the twenty-third capacitor and the other end of the twenty-fourth capacitor, the CC1 port of the switch control chip is simultaneously connected with the second voltage stabilizing diode, and the cathode of the second voltage stabilizing diode is arranged on the other voltage stabilizing diode.

The power supply circuit for charging control, wherein the second power supply chip is further connected with a power supply port, the power supply port is used for receiving rated voltage of rated 5V, the first power supply chip is further connected with another power supply port, and the other power supply port is used for receiving rated voltage of 20V.

The power supply circuit for charging control, wherein the first MOS tube is an enhanced field effect N-MOS tube, and a diode is connected in series between the drain electrode and the source electrode of the first MOS tube.

The power supply circuit for charging control, wherein the second MOS tube and the third MOS tube are enhanced field effect N-MOS tubes, a diode is connected in series between the drain electrode and the source electrode of the second MOS tube, and a diode is connected in series between the drain electrode and the source electrode of the third MOS tube.

The power supply circuit for charging control, wherein the first connecting end of the main control chip is at least connected with two low-voltage charging circuits.

Compared with the prior art, the utility model has the following advantages:

the utility model relates to a power supply circuit for charging control, which comprises a main control circuit, a fast full control circuit and a low-voltage charging circuit, wherein the fast full control circuit is also provided with an output control circuit, after the main control circuit and the fast full control circuit are mutually matched, a first MOS tube arranged on the other side of the main control circuit is subjected to on-off control through a main control chip arranged in the main control circuit so as to enable the fast full control circuit connected with the main control circuit to perform voltage transformation, thereby synchronously switching the power supply output power, the other end of the main control circuit is additionally provided with a plurality of low-voltage charging circuits, each low-voltage charging circuit can synchronously perform power output, the MOS tubes arranged in the fast flushing sub-control circuit synchronously perform voltage transformation control, so that the main control chip arranged in the main control circuit can synchronously perform output conversion on voltage in cooperation with the sub-control chip arranged in the fast full control circuit, and simultaneously current can not be communicated through the inductor on one side of the main control chip, and thus the processing process of high voltage and low voltage can be rapidly switched, thereby further improving the voltage conversion efficiency in the power supply circuit.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a circuit diagram of a main control circuit of a power supply circuit for charging control according to an embodiment of the present utility model;

fig. 2 is a circuit configuration diagram of a combination of a fast full control circuit and an output control circuit for power circuit connection for charge control according to an embodiment of the present utility model;

fig. 3 is a circuit configuration diagram of a low-voltage charging circuit of a power supply circuit for charging control according to an embodiment of the present utility model;

fig. 4 is a circuit configuration diagram of a fast full control circuit of a power supply circuit for charging control according to an embodiment of the present utility model;

fig. 5 is a circuit configuration diagram of an output control circuit of a power supply circuit for charge control according to an embodiment of the present utility model.

The device comprises a main control circuit S1, a fast full control circuit S2, a low-voltage charging circuit S3, an output control circuit S4, a protection circuit S5, a first connecting end P1 of the main control circuit, a first connecting end P2 of the low-voltage charging circuit and a first connecting end P3 of the sub-control chip;

A first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8, a ninth capacitor C9, a tenth capacitor C10, an eleventh capacitor C11, a twelfth capacitor C12, a thirteenth capacitor C13, a fourteenth capacitor C14, a fifteenth capacitor C15, a sixteenth capacitor C16, a seventeenth capacitor C17, an eighteenth capacitor C18, a nineteenth capacitor C19, a twentieth capacitor C20, a twenty-first capacitor C21, a twenty-second capacitor C22, a twenty-third capacitor C23, and a twenty-fourth capacitor C24;

a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, a sixteenth resistor R16, a seventeenth resistor R17, an eighteenth resistor R18, a nineteenth resistor R19, a twentieth resistor R20, and a twenty-first resistor R21;

the device comprises a main control chip U1, a sub control chip U2, a first power supply chip U3, a second power supply chip U4, a switch control chip U5 and a transformer T;

the first MOS tube M1, the second MOS tube M2, the third MOS tube M3, the light emitting diode D1, the first zener diode VD1 and the second zener diode VD2.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be understood that the terms "comprises" and "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

It is also to be understood that the terminology used in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be further understood that the term "and/or" as used in the present specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.

Referring to fig. 1, 2 and 3, as shown in the drawings, a power supply circuit for charging control is provided in an embodiment of the present utility model, wherein the circuit includes: the system comprises a main control circuit S1, a fast full control circuit S2 and a low-voltage charging circuit S3, wherein the fast full control circuit and the low-voltage charging circuit are connected with the main control circuit;

the master control circuit S1 includes: the main control chip U1, the first capacitor C1, the second capacitor C2, the third capacitor C3, the fourth capacitor C4, the first resistor R1, the second resistor R2, the third resistor R3 and the first MOS tube M1; the connection point between the main control circuit S1 and the fast full control circuit S2 is used as a circuit starting point, the VIN port of the main control chip S1 is simultaneously connected with the connection point between one end of the fast full control circuit S2 and the drain of the first MOS transistor M1, the gate of the first MOS transistor M1 is connected with the first connection end of the sub-control chip U2 provided with the fast full control circuit S2, the source of the first MOS transistor M1 is connected with the first connection end of the low-voltage charging circuit S3, one end of the first capacitor C1, one end of the second capacitor C2, one end of the third capacitor C3 are all connected in series with the connection point between the main control chip U1 and the fast full control circuit S2, the other end of the first capacitor C1, the other end of the second capacitor C2, the other end of the third capacitor C3 are simultaneously grounded, the MODE port of the main control chip U1 is connected with one end of the first resistor R1, the one end of the second capacitor C1 is connected with the other end of the second capacitor C1, and the other end of the third resistor C2 is connected with the second resistor R2.

The other side of the main control chip U1 is also connected with a protection circuit S5, and the protection circuit S5 comprises: the fourth resistor R4, the fifth resistor R5, the sixth resistor R6, the seventh resistor R7, the fifth capacitor C5, the sixth capacitor C6, the seventh capacitor C7, the eighth capacitor C8 and the inductor L, the SW1 port of the main control chip U1 is simultaneously connected with one end of the inductor L and one end of the fourth resistor R4, the other end of the fourth resistor R4 is connected with one end of the sixth capacitor C6, the other end of the sixth capacitor C6 is grounded, the fifth capacitor C5 is connected in series between the SW2 port of the main control chip U1 and the BOOT port of the main control chip U1, the other end of the inductor L is simultaneously connected with the VOUT port of the main control chip U1, one end of the fifth resistor R5, one end of the seventh capacitor C7, one end of the eighth capacitor C8, the first connecting end of the fast and full control circuit S2, the FB port of the main control chip U1 is connected with one end of the sixth resistor R6, the other end of the sixth resistor R6 is simultaneously connected with the other end of the seventh resistor C7, and the other end of the seventh resistor C7 is simultaneously connected with the other end of the seventh resistor C7.

Specifically, in this embodiment of the present invention, the power supply circuit is suitable for chargers of different types, after the current flows into one end of the main control chip U1, the source and the drain of the first MOS transistor M1 are electrically connected at this time, so as to connect the current on-off, at this time, the main control circuit S1 is electrically connected with the low-voltage charging circuit S3, and meanwhile, the power supply connected with the second power supply chip U4 in the low-voltage charging circuit S3 provides the power supply voltage of 5V1.5A, at this time, the main control circuit S1 only provides 5V1.5A rated power for the charging ports of the mobile phone and the electronic product, and does not need to conduct current connection through the inductor L provided by the first main control circuit S1, so as to identify the rated power required to be charged for the electronic device to be charged currently for the charging port in the charger, thereby providing a stable 5V1.5A output environment for the device to be charged according to the user requirement, so as to improve the overall voltage conversion efficiency of the whole power supply circuit.

Further, in an embodiment, if the main control chip U1 in the main control circuit S1 detects that the current user needs to use the fast charging requirement, the gate of the first MOS transistor M1 is electrically connected with the drain at this time, meanwhile, the power supply connected to the first power supply chip U3 in the fast full control circuit S2 provides rated power of 20V3A, meanwhile, the sub control chip U2 in the fast full control circuit S2 recognizes that the main control chip U1 needs to execute the fast charging instruction, and simultaneously, the switch of the third MOS transistor M3 of the second MOS transistor M1 is turned on, and the rated power required to be charged by the electronic device to be charged is recognized for the charging port in the charger, at this time, the light emitting diode in the fast full control circuit S2 emits light, so that the current fast full control circuit S2 is working, so as to perform charging operation on the corresponding device to be charged according to the user requirement, and provide stable output of 20V3A to the device to be charged, thereby improving the voltage conversion efficiency of the whole power supply circuit.

Referring to fig. 1, as shown in the drawing, the AGND port of the main control chip U1, the PGND port of the main control chip U1, the SNS2P port of the main control chip U1, the SNS n port of the main control chip U1, and the SNS1P port of the main control chip U1 are all grounded.

Specifically, in one embodiment, the ports (the AGND port, the PGND port, the SNS2P port, the SNS n port, and the SNS1P port) of the main control chip are all grounded, so that the main control chip U1 is electrically protected, so that the stability of the whole use of the main control circuit U1 is improved, and the large current is filtered through the ports, so that the failure rate of the main control chip is reduced.

Referring to fig. 2 and 4, as shown in the drawings, the fast and full control circuit includes: the CSN1 port of the sub-control chip U2 is simultaneously connected with the source electrode of the second MOS tube, one end of the ninth capacitor C9, one end of the tenth capacitor C10, one end of the eleventh capacitor C11 and one end of the eighth resistor R8, the twelfth capacitor R12 is arranged between the CSN1 port of the sub-control chip U2 and the CSP1 port of the sub-control chip U2 in parallel, the CSP1 port of the sub-control chip U2 is connected with one end of the tenth resistor R10, the other end of the tenth resistor R10 is simultaneously connected with the other end of the eighth resistor R8, the drain electrode of the second MOS tube M2 is connected with the drain electrode of the third MOS tube M3, and the connection point between the second MOS tube M2 and the third MOS tube M3 is connected to the first connection end of the master control circuit S1, the other end of the ninth capacitor R9, the other end of the tenth capacitor 10, and the other end of the eleventh capacitor C11 are all connected in series between the drain of the third MOS tube M3 and the drain of the second MOS tube M2, the VOUT1G port of the sub-control chip U2 is connected to the gate of the third MOS tube M3, the VOUT port of the sub-control chip U2 is connected to one end of the ninth resistor R9, the other end of the ninth resistor R9 is simultaneously connected to the source of the third MOS tube M3, the A4 port of the first power chip U3, and the other end of the eighth resistor R8 is also connected to the A1 port of the first power chip U3, and the thirteenth capacitor C13 is arranged in parallel between the first power chip U3 and the sub-control chip U2.

Specifically, in this embodiment of the present invention, the shunt control chip U2 is provided with a plurality of capacitors in parallel, and the plurality of capacitors are used for filtering the input high voltage, so as to prevent the voltage from interfering with the control signal of the shunt control chip U2, thereby ensuring that the second MOS tube M2 and the third MOS tube M3 perform on-off control on the input high voltage, and after being matched with the transformer T on the other side for use, perform the transformation treatment on the high voltage to be converted at the same time, and ensure that the shunt control circuit stably performs stable power supply on the electronic device to be charged.

Specifically, in this embodiment, the voltage output end of the first power supply chip is an (A4 port and a B4 port), and the two ports are used for simultaneously connecting the sources of the second MOS transistor and the third MOS transistor to form a circuit for supplying power to the transformer.

Further, in this embodiment, two MOS transistors (a second MOS transistor and a third MOS transistor) are disposed in parallel on the CSN1 port of the sub-control chip and the CSP1 port of the sub-control chip, the second MOS transistor M2 and the third MOS transistor M3 are used for controlling the transformer, in one embodiment, when the user needs to perform the fast charging operation on the device to be charged, the sub-control chip U2 is electrically connected with the second MOS transistor M2 and the third MOS transistor M3, so as to perform the on-off control on the first power chip U3 on the other side, at this time, the VOUT2G port on the other end of the current sub-control chip U2 flows into one end of the main control chip U1, so as to provide the charging voltage of 20V and the rated current of 3A for the device to be charged,

Referring to fig. 2 and 4, as shown in the drawing, a transformer T is further connected in series between the second MOS transistor M2 and the third MOS transistor M3, one end of the transformer T is connected to the drain electrode of the second MOS transistor M2, and the other end of the transformer T is connected to the drain electrode of the third MOS transistor M3.

Specifically, in the embodiment of the present invention, two MOS transistors (a second MOS transistor M2 and a third MOS transistor M3) are disposed in parallel on a CSN1 port of the sub-control chip U2 and a CSP1 port of the sub-control chip U2, the second MOS transistor M2 and the third MOS transistor M3 are used for regulating and controlling the transformer, in one embodiment, when a user needs to perform a fast charging operation on a device to be charged, the sub-control chip is electrically connected with the second MOS transistor M2 and the third MOS transistor M3, so as to perform on-off control on a first power supply chip on the other side, at this time, a VOUT2G port on the other end of the current sub-control chip U2 flows into one end of the main control chip U1, so as to provide a charging voltage of 20V and a rated current of 3A for the device to be charged,

further, if the user does not carry out fast charging, the transformer is turned on by default at this moment, the voltage of charging of 20V is transformed, at this moment, the switches of the second MOS tube M2 and the third MOS tube M3 are turned on, the transformer begins to work by default at this moment, the rated voltage of 20V is changed into low voltage, and thus the charging power of the voltage (5V1.5A) which is suitable for low voltage charging is adapted.

Referring to fig. 2 and fig. 5, as shown in the drawing, the first connection end of the fast and full control circuit S2 is further connected to an output control circuit S4, and the output control circuit S4 includes: an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, a sixteenth resistor R16, a seventeenth resistor R17, an eighteenth resistor R18, a nineteenth resistor R19, a twentieth resistor R20, a fourteenth capacitor C14, a fifteenth capacitor C15, a sixteenth capacitor C16, a seventeenth capacitor C17, an eighteenth capacitor C18, a nineteenth capacitor C19, a twentieth capacitor C20, a twenty first capacitor C21, a light emitting diode D1, a CMPV port of the sub-control chip U2 is connected with one end of the eleventh resistor R11, the other end of the eleventh resistor R11 is connected with one end of the fourteenth capacitor C14, the other end of the fourteenth capacitor C14 is simultaneously connected with one end of the twelfth resistor R12, the negative electrode of the light emitting diode D1, the other end of the fifteenth capacitor C15 and the FB port of the sub-control chip U2, the positive electrode of the light emitting diode D1 is connected with one end of the main control circuit S1 and the other end of the twelfth resistor R12 at the same time, the CMPI port of the sub-control chip U2 is connected with one end of the fifteenth capacitor C15, the VOUT2 port of the sub-control chip U2 is connected with one end of the thirteenth resistor R13, the other end of the thirteenth resistor R13 is connected with one end of the low voltage charging circuit S3, the VOUTT2G port of the sub-control chip U2 is connected with one end of the fourteenth resistor R14, the other end of the fourteenth resistor R14 is connected with the drain electrode of the first MOS tube M1 in the main control circuit S1, the CC1 port of the sub-control chip U2 is connected with one end of the fifteenth resistor R15 and the A5 port of the first power chip U3 at the same time, the CC2 port of the sub-control chip U2 is connected with one end of the sixteenth resistor R16 and one end of the seventeenth capacitor C17 at the same time, the other end of the sixteenth resistor R16 is connected to the B5 port of the first power supply chip U3, the DP port of the divide-control chip U2 is simultaneously connected to one end of the seventeenth resistor R17 and one end of the eighteenth capacitor C18, the other end of the seventeenth resistor R17 is connected to the B6 port of the divide-control chip U2, the DM port of the divide-control chip U2 is simultaneously connected to one end of the eighteenth resistor R18 and one end of the nineteenth capacitor C19, the other end of the eighteenth resistor R18 is connected to the A7 port of the divide-control chip U2, the VCC port of the divide-control chip U2 is simultaneously connected to one end of the twentieth capacitor C21, the other end of the nineteenth resistor R19 is grounded, the PLUG port of the divide-control chip U2 is connected to one end of the twentieth resistor R20, the other end of the sixteenth resistor R20 is grounded, and the other end of the seventeenth capacitor C16 is connected to the other end of the twenty-first capacitor C20, and the other end of the twenty-eighth capacitor C20 is connected to the other end of the twenty-eighth capacitor C20.

Specifically, in this embodiment, one side of the sub-control chip U2 is connected with a light emitting diode D1, the light emitting diode D1 is configured to send a light signal, prompt that the current output voltage of the user is a fast-flushing voltage, the user can determine whether to start a fast-charging gear according to the current color of light, in one embodiment, if the light of the light emitting diode D1 turns yellow, the current fast-charging is not started, the output voltage is 5V low voltage, if the light of the light emitting diode D1 turns green, the current fast-charging is displayed as an on state, the output voltage is 20V high voltage, the other side of the sub-control chip U2 is connected with a first power chip U3, the positive connection port of the first power chip U3 is (B6, A6), the negative connection port of the first power chip U3 is (A7, B7), the (a 12/B1/B12) port of the first power chip U3 is a ground terminal, the first power chip U3 and the sub-control chip U2 are connected with multiple current ports of the first power chip U3 in parallel, and the multiple power chips are connected with multiple power chips in parallel, and the multiple voltage control chips are connected with each other end of the first power chip U2 is further connected with multiple power chips in parallel, and multiple power chips are connected with multiple voltage control chips in parallel, and multiple voltage control chips are connected with each other end of the power chips are connected with each other through multiple voltage control chips, and multiple voltage control chips are further connected with each voltage control chip is connected with the voltage control circuit, and has a voltage-circuit is connected with multiple voltage control chip, and has a voltage switch circuit, and has a voltage switch circuit.

Referring to fig. 3, as shown in the drawing, the low-voltage charging circuit S3 includes: the second power supply chip U2, the switch control chip U5, the twenty-second capacitor C22, the twenty-second capacitor C23, the twenty-fourth capacitor C24, the twenty-first resistor R21, the first zener diode VD1 and the second zener diode VD2; the VIN port of the switch control chip U5 is simultaneously connected to one end of the master control circuit S1 and one end of the twenty-second capacitor C22, the ISET port of the switch control chip U5 is simultaneously connected to one end of the twenty-first resistor R21 and one end of the twenty-second capacitor C23, the other end of the twenty-second capacitor C22, the other end of the twenty-first resistor R21, the other end of the twenty-second capacitor C23 and the GND end of the switch control chip U5 are all grounded, the VOUT port of the switch control chip U5 is simultaneously connected to the A4 end of the second power chip U4, one end of the twenty-fourth capacitor C24, the other end of the twenty-fourth capacitor C24 is grounded, the CC2 port of the switch control chip U5 is simultaneously connected to the negative electrode of the first zener diode VD1, the positive electrode of the first zener diode VD1 is simultaneously connected to the A1 end of the second power chip U4, the other end of the twenty-second capacitor C22, the second resistor C21, the other end of the second zener diode C23, and the other end of the second zener diode VD1 are simultaneously connected to the negative electrode of the second zener diode VD 1.

Specifically, in this embodiment, a zener diode is disposed in parallel between the second power chip U4 and the switch control chip U5, the zener diode is configured to perform on-off control on the CC1 port and the CC2 port of the second power chip U4, and convert the high voltage into the low voltage, and into the output environment of 5V1.5A, so that the VIN port of the switch control chip U5 outputs the voltage to the master control circuit S1 to perform voltage output, the (A4 and B4 ports) of the second power chip U4 are both voltage output ports, the (A5 and B5 ports) of the second power chip U4 are both control ports, the (B6, A7, and B7 ports) of the second power chip U4 are power adapting ports, and the (a 12/B1 and A1/B12 ports) of the second power chip U4 are ground terminals.

Referring to fig. 2 and 3, as shown in the drawing, the second power chip U4 is further connected to a power supply port, the power supply port is configured to receive a rated voltage of 5V, the second power chip U3 is further connected to another power supply port, and the other power supply port is configured to receive a rated voltage of 20V.

Specifically, in this embodiment of the present invention, one end of the second power chip U4 is connected with a power supply, the power supply is plugged into a socket of the charger, after the user plugs the charger into the socket, the second power chip U4 of the charger is powered on at this time and then matches the output voltage with a sub-control chip in the fast full control circuit to control, thereby further carrying out on-off control on the second MOS tube and the third MOS tube, and further stably carrying out output 20V high voltage, in addition, the second power chip U3 is also connected with another power port, the switch control chip U5 connected with the second power chip U3 carries out voltage transformation control, at this time, output 5V low voltage, this kind of setting mode, after being matched with and used by the main control circuit S1 and the sub-control circuit, and carrying out on-off control on different voltages by a plurality of MOS tubes, then installs the charger, only one charger is needed, and fast charging and discharging on a plurality of different devices can be completed, and the overall voltage conversion efficiency of the power circuit is improved.

Referring to fig. 1 and 2, as shown in the drawings, the first MOS transistor is an enhancement-type field-effect N-MOS transistor, and a diode is connected in series between a drain and a source of the first MOS transistor.

Specifically, in this embodiment, an MOS transistor (first MOS transistor) is disposed in the main control circuit S1, and is integrally a field-effect enhanced N-MOS transistor, and a diode is connected in series between the drain and the source of the field-effect enhanced N-MOS transistor M1, and the MOS transistor after being connected in series is used to filter a signal connected on-off, so as to improve voltage protection of the input protection circuit, prevent heavy current from interfering on-off control between the N-MOS transistor to the low voltage charging circuit S3 and the fast full control circuit, and in this manner, ensure fast conversion between the first MOS transistor to the high voltage and the low voltage, so as to improve overall voltage conversion efficiency.

Referring to fig. 2, as shown in the drawing, the second MOS transistor and the third MOS transistor are enhancement-type field effect N-MOS transistors, a diode is connected in series between the drain and the source of the second MOS transistor, and a diode is connected in series between the drain and the source of the third MOS transistor.

Specifically, in this embodiment of the present invention, two MOS transistors (a second MOS transistor and a third MOS transistor) are disposed in the fast full-control circuit, the MOS transistor is an enhanced field-effect N-MOS transistor, and a diode is connected in series between the drain and the source of the field-effect N-MOS transistor M1, and the MOS transistor after being connected in series is used for filtering a signal connected on-off, so as to improve voltage protection of the input protection circuit, prevent heavy current from interfering with on-off control of the N-MOS transistor on voltage, and the N-MOS transistor of the fast full-control circuit performs on-off control of the voltage of the transformer, so as to perform segment control on the voltage.

Referring to fig. 1 and fig. 3, as shown in the drawing, at least two low-voltage charging circuits S3 are connected to the first connection end of the main control chip U1.

Specifically, be connected with two at least low-voltage charging circuit S3 on the first connection end of main control chip U1, all provide 5V1.5A output environment on each low-voltage charging circuit S3, thereby form the charging connector that has a plurality of quick charge holes, in one embodiment, be provided with a plurality of charging jacks on the charger, the charging jack corresponds to different output, the user can peg graft electronic equipment in the charging jack that corresponds according to own demand, this kind of setting up mode sets up a plurality of charging jacks, only need a charger can accomplish the quick charge to a plurality of electronic equipment, guarantee that a plurality of electronic equipment carry out quick charge simultaneously, after the branch accuse circuit is installed to one side of main control circuit S1 additional, improve the holistic charging efficiency of charger simultaneously.

While the utility model has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made and equivalents will be apparent to those skilled in the art without departing from the scope of the utility model. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.

Claims

1. A power supply circuit for charge control, the power supply circuit comprising: the system comprises a main control circuit, a fast full control circuit and a low-voltage charging circuit, wherein the fast full control circuit and the low-voltage charging circuit are connected with the main control circuit;

the master control circuit includes: the device comprises a main control chip, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a first resistor, a second resistor, a third resistor and a first MOS tube; the connection point between the main control circuit and the quick and full control circuit is used as a circuit starting point, the VIN port of the main control chip is simultaneously connected with the first connection end of the quick and full control circuit and the drain electrode of the first MOS tube, the grid electrode of the first MOS tube is connected with the first connection end of the sub-control chip arranged by the quick and full control circuit, the source electrode of the first MOS tube is connected with the first connection end of the low-voltage charging circuit, one end of the first capacitor, one end of the second capacitor and one end of the third capacitor are connected in series with the connection point between the main control chip and the quick and full control circuit, the other end of the first capacitor, the other end of the second capacitor and the other end of the third capacitor are simultaneously grounded, the MODE port of the main control chip is connected with one end of the first resistor, the FREQ port of the main control chip is connected with the fourth capacitor, the PWR port of the main control chip is connected with one end of the third resistor, and the other end of the main control chip is connected with the other end of the third resistor, and the other end of the third resistor is connected with the VCC resistor;

The other side of the main control chip is also connected with a protection circuit, and the protection circuit comprises: the device comprises a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, a fifth capacitor, a sixth capacitor, a seventh capacitor, an eighth capacitor and an inductor, wherein an SW1 port of a main control chip is simultaneously connected with one end of the inductor and one end of the fourth resistor, the other end of the fourth resistor is connected with one end of the sixth capacitor, the other end of the sixth capacitor is grounded, the fifth capacitor is connected in series between an SW2 port of the main control chip and a BOOT port of the main control chip, the other end of the inductor is simultaneously connected with a VOUT port of the main control chip, one end of the fifth resistor, one end of the seventh capacitor, one end of the eighth capacitor and a first connecting end of a fast and full control circuit, the FB port of the main control chip is simultaneously connected with one end of the sixth resistor, the other end of the seventh resistor and one end of the seventh capacitor, and the other end of the seventh resistor are simultaneously connected with the other end of the eighth capacitor and one grounding end.

2. The power supply circuit for charge control of claim 1, wherein the AGND port of the master chip, the PGND port of the master chip, the SNS2P port of the master chip, the SNS n port of the master chip, and the SNS1P port of the master chip are all grounded.

3. The power supply circuit for charge control according to claim 1, wherein the fast enough control circuit includes: the MOS transistor comprises a sub-control chip, a first power chip, a second MOS tube, a third MOS tube, a ninth capacitor, a tenth capacitor, an eleventh capacitor, a twelfth capacitor, a ninth resistor, a tenth resistor and a thirteenth capacitor, wherein the CSN1 port of the sub-control chip is simultaneously connected with the source electrode of the second MOS tube, one end of the ninth capacitor, one end of the tenth capacitor, one end of the eleventh capacitor and one end of the eighth resistor, the twelfth capacitor is arranged between the CSN1 port and the CSP1 port of the sub-control chip in parallel, the CSP1 port of the sub-control chip is connected with one end of the tenth resistor, the other end of the tenth resistor is simultaneously connected with the other end of the eighth resistor, the drain electrode of the second MOS tube is connected with the drain electrode of the third MOS tube, the connection point between the second MOS tube and the third MOS tube is connected with the first connection end of the main control circuit, the other end of the ninth capacitor, the other end of the eleventh capacitor and the other end of the eleventh capacitor are all connected with the drain electrode of the third MOS tube, the MOS tube is connected with the drain electrode of the third MOS tube, and the MOS tube is connected with the drain electrode of the first MOS tube, and the drain electrode of the MOS tube is connected with the drain electrode of the third MOS tube, and the MOS tube is connected with the drain electrode of the third MOS tube.

4. The power supply circuit for charging control according to claim 3, wherein a transformer is further connected in series between the second MOS transistor and the third MOS transistor, one end of the transformer is connected to the drain electrode of the second MOS transistor, and the other end of the transformer is connected to the drain electrode of the third MOS transistor.

5. The power supply circuit for charge control according to claim 1, wherein the first connection terminal of the fast full control circuit is further connected with an output control circuit, the output control circuit comprising: an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, an eighteenth resistor, a nineteenth resistor, a twentieth resistor, a fourteenth capacitor, a fifteenth capacitor, a sixteenth capacitor, a seventeenth capacitor, a eighteenth capacitor, a nineteenth capacitor, a twentieth capacitor, a twenty first capacitor, a light emitting diode, a CMPV port of the minute control chip is connected to one end of the eleventh resistor, the other end of the eleventh resistor is connected to one end of the fourteenth capacitor, the other end of the fourteenth capacitor is simultaneously connected to one end of the twelfth resistor, a negative electrode of the light emitting diode, the other end of the fifteenth capacitor and a FB port of the minute control chip, a positive electrode of the light emitting diode is simultaneously connected to one end of the master control circuit and the other end of the twelfth resistor, a VOUT2 port of the minute control chip is connected to one end of the thirteenth resistor, the other end of the thirteenth resistor is connected to one end of the low-voltage charging circuit, the other end of the eleventh resistor is connected to one end of the minute control chip, the other end of the seventeenth resistor is simultaneously connected to the seventeenth port of the minute control chip, the seventeenth resistor is simultaneously connected to the one end of the seventeenth resistor of the minute control chip, the seventeenth resistor is connected to the other end of the minute control chip, and the seventeenth resistor is connected to the other end of the minute control chip is connected to the power supply, and the seventeenth resistor is connected to the one end of the fifth resistor of the minute control chip is connected to the fifth resistor, the other end of the seventeenth resistor is connected with the B6 port of the sub-control chip, the DM port of the sub-control chip is simultaneously connected with one end of the eighteenth resistor and one end of the nineteenth capacitor, the other end of the eighteenth resistor is connected with the A7 port of the sub-control chip, the VCC port of the sub-control chip is connected with one end of the twentieth capacitor, the VIN port of the sub-control chip is simultaneously connected with one end of the nineteenth resistor and one end of the twentieth capacitor, the other end of the nineteenth resistor is grounded, and the other end of the sixteenth capacitor, the other end of the seventeenth capacitor, the other end of the eighteenth capacitor, the other end of the nineteenth capacitor, the other end of the twentieth capacitor and the GND port of the sub-control chip are all connected with the grounding end of the twentieth resistor.

6. A power supply circuit for charge control according to claim 3, wherein the low-voltage charging circuit comprises: the second power chip, the switch control chip, the twenty-second capacitor, the twenty-third capacitor, the twenty-fourth capacitor, the twenty-first resistor, the first zener diode and the second zener diode; the VIN port of the switch control chip is simultaneously connected with one end of the main control circuit and one end of the twenty-second capacitor, the ISET port of the switch control chip is simultaneously connected with one end of the twenty-first resistor and one end of the twenty-third capacitor, the other end of the twenty-second capacitor, the other end of the twenty-first resistor, the other end of the twenty-third capacitor and the GND end of the switch control chip are grounded, the VOUT port of the switch control chip is simultaneously connected with the A4 end of the second power chip and one end of the twenty-fourth capacitor, the other end of the twenty-fourth capacitor is grounded, the CC2 port of the switch control chip is simultaneously connected with the cathode of the first voltage stabilizing diode, the anode of the first voltage stabilizing diode is simultaneously connected with the A1 end of the second power chip, the other end of the twenty-second capacitor, the other end of the twenty-third capacitor and the other end of the twenty-fourth capacitor, the CC1 port of the switch control chip is simultaneously connected with the second voltage stabilizing diode, and the cathode of the second voltage stabilizing diode is arranged on the other voltage stabilizing diode.

7. The power supply circuit for charge control according to claim 6, wherein the second power supply chip is further connected to a power supply port for receiving a rated voltage of 5V, and the first power supply chip is further connected to another power supply port for receiving a rated voltage of 20V.

8. The power supply circuit for charge control according to claim 1, wherein the first MOS transistor is an enhancement-type field effect N-MOS transistor, and a diode is connected in series between a drain and a source of the first MOS transistor.

9. The power supply circuit for charge control according to claim 3, wherein the second MOS transistor and the third MOS transistor are enhancement-type field effect N-MOS transistors, a diode is connected in series between a drain and a source of the second MOS transistor, and a diode is connected in series between a drain and a source of the third MOS transistor.

10. The power supply circuit for charging control according to claim 1, wherein one end of the main control chip is connected with at least two low-voltage charging circuits.