Multi-channel fast charging circuit and charging equipment

Abstract

The utility model discloses a multi-channel fast charging circuit and charging equipment. The multi-channel fast charging circuit comprises a plurality of source input interfaces, a voltage stabilizing module, a microprocessor and a plurality of fast charging branches. The input end of the voltage stabilizing module is connected with one of the power input interfaces, the power end of the microprocessor is connected with the output end of the voltage stabilizing module, the first communication end of the microprocessor is connected with a first communication interface, and the first communication interface is used for being connected with an upper computer. Each quick charge branch comprises a step-down control module, an access control module and a quick charge integrated module, the input end of the step-down control module is connected with the corresponding power input interface, the output end of the step-down control module is connected with the input end of the access control module, and the output end of the access control module is connected with a power output interface; the control end of the voltage reduction control module and the control end of the access control module are respectively connected with the fast charging integrated module, and the fast charging integrated module is further connected with the second communication end of the microprocessor. Therefore, multi-channel fast charging can be supported, and communication with an upper computer can be realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to power supply technical field especially relates to a kind of multi-channel fast charging circuit and charging equipment. BACKGROUND

[0002] The fast charging channel of charger on market is few, and the protocol supported is single, and the output on-off and communication cannot be controlled by host computer. With more and more second-hand mobile phones on the market, the demand for battery detection after mobile phone recycling is increasing, and fast charging equipment supporting multiple channels needs to be designed. SUMMARY

[0003] The utility model aims at at least one of the technical problems existing in prior art. To this end, the utility model provides a kind of multi-channel fast charging circuit and charging equipment, which can support multi-channel fast charging and communicate with host computer.

[0004] In one aspect, the utility model embodiment provides a kind of multi-channel fast charging circuit, comprising:

[0005] Multiple power input interfaces;

[0006] A voltage stabilizing module is connected to one of the multiple power input interfaces at the input end;

[0007] A microprocessor is connected to the output end of the voltage stabilizing module at the power supply end, a first communication interface is connected to the first communication end of the microprocessor, and the first communication interface is used to connect host computer;

[0008] Multiple fast charging branches, each fast charging branch includes a buck control module, a pass control module and a fast charging integrated module, the input end of the buck control module is connected to the corresponding power input interface, the output end of the buck control module is connected to the input end of the pass control module, the output end of the pass control module is connected to the power output interface, the control end of the buck control module and the control end of the pass control module are respectively connected to the fast charging integrated module, and the fast charging integrated module is also connected to the second communication end of the microprocessor.

[0009] According to some embodiments of the utility model, each power input interface is connected to at least two of the multiple fast charging branches.

[0010] According to some embodiments of the utility model, the number of power input interfaces is 4, the number of fast charging branches is 24, and each power input interface is connected to 6 fast charging branches.

[0011] According to some embodiments of the utility model, each power input interface is connected to a surge protection module.

[0012] According to some embodiments of the utility model, the surge protection module includes TVS diode, first end of TVS diode is connected with power input interface, second end of TVS diode is connected with reference voltage end.

[0013] According to some embodiments of the utility model, the voltage reduction control module includes first MOS tube and second MOS tube, high voltage end of first MOS tube is connected to power input interface, low voltage end of first MOS tube is connected with high voltage end of second MOS tube to be used as output end of voltage reduction control module, low voltage end of second MOS tube is connected with reference voltage end, control end of first MOS tube and control end of second MOS tube are connected with fast charging integrated module.

[0014] According to some embodiments of the utility model, the passage control module includes third MOS tube and fourth MOS tube, high voltage end of third MOS tube is connected with output end of voltage reduction control module, low voltage end of third MOS tube is connected to power output interface, high voltage end and control end of fourth MOS tube are connected with fast charging integrated module respectively, low voltage end of fourth MOS tube is connected with control end of third MOS tube.

[0015] According to some embodiments of the utility model, the fast charging integrated module adopts integrated circuit module with model number SW3538.

[0016] According to some embodiments of the utility model, the fast charging integrated module is further connected with fast charging protocol decoding module.

[0017] In another aspect, the utility model provides a charging device, including the multi-channel fast charging circuit of above.

[0018] The utility model embodiment has at least the following beneficial effects:

[0019] The utility model embodiment is provided with multiple fast charging branches, can support multi-channel fast charging, each fast charging branch includes voltage reduction control module, passage control module and fast charging integrated module, can control each fast charging branch individually, and microprocessor is connected with host computer through first communication interface, and is connected with fast charging integrated module through second communication end, can communicate with host computer, to realize that host computer controls the on-off of fast charging branch.

[0020] Additional aspects and advantages of the utility model will be given in part in the following description, part will become obvious from the following description, or be understood by the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0021] The above and / or additional aspects and advantages of the present utility model will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the references to the following drawings, of which:

[0022] Figure 1 The principle block diagram of the multi-channel fast charging circuit of the utility model embodiment is shown in the figure.

[0023] Figure 2 The principle block diagram of the multi-channel fast charging circuit of the utility model embodiment is shown in the figure. Figure 1 The circuit principle diagram of the surge protection module of the multi-channel fast charging circuit is shown in the figure.

[0024] Figure 3 The circuit principle diagram of the multi-channel fast charging circuit of the utility model embodiment is shown in the figure. Figure 1 The circuit principle diagram of the multi-channel fast charging circuit of the utility model embodiment is shown in the figure.

[0025] Figure 4 The circuit principle diagram of the multi-channel fast charging circuit of the utility model embodiment is shown in the figure. Figure 1 The circuit principle diagram of the multi-channel fast charging circuit of the utility model embodiment is shown in the figure.

[0026] Reference signs:

[0027] The power input interface 100, the voltage stabilizing module 200, the microprocessor 300, the first communication interface 310, the fast charging branch 400, the voltage reduction control module 410, the passage control module 420, the fast charging integrated module 430, the power output interface 440, the fast charging protocol decoding module 450, and the surge protection module 500. DETAILED DESCRIPTION

[0028] The embodiments of the present utility model are described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present utility model, and cannot be understood as limiting the present utility model.

[0029] In the description of the present utility model, the meaning of "several" is one or more, the meaning of "multiple" is two or more, greater than, less than, more than, etc. are understood as not including the number, "above", "below", "within", etc. are understood as including the number. If there is a description of "first", "second", etc. is only used to distinguish technical features for the purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0030] In the description of the present utility model, unless otherwise explicitly limited, the words "set", "connected", etc. should be broadly understood, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present utility model according to the specific content of the technical scheme.

[0031] The embodiment discloses a charging device including a multi-channel fast charging circuit. Figure 1 The multi-channel fast charging circuit includes a power input interface 100, a voltage stabilizing module 200, a microprocessor 300 and a plurality of fast charging branches 400. The power input interface 100 is in plurality, the input end of the voltage stabilizing module 200 is connected with one of the plurality of power input interfaces 100, the voltage stabilizing module 200 is used for reducing and stabilizing the voltage input by the power input interface 100 to meet the working voltage requirement of the microprocessor 300, the power supply end of the microprocessor 300 is connected with the output end of the voltage stabilizing module 200, the first communication end of the microprocessor 300 is connected with a first communication interface 310, such as a serial communication interface, the first communication interface 310 is used for connecting a host computer, each fast charging branch 400 includes a voltage reduction control module 410, a channel control module 420 and a fast charging integrated module 430, the input end of the voltage reduction control module 410 is connected with the corresponding power input interface 100, the output end of the voltage reduction control module 410 is connected with the input end of the channel control module 420, the output end of the channel control module 420 is connected with a power output interface 440, the control end of the voltage reduction control module 410 and the control end of the channel control module 420 are respectively connected with the fast charging integrated module 430, and the fast charging integrated module 430 is further connected with the second communication end of the microprocessor 300.

[0032] The embodiment is provided with the plurality of fast charging branches 400, which can support multi-channel fast charging; each fast charging branch 400 includes the voltage reduction control module 410, the channel control module 420 and the fast charging integrated module 430, each fast charging branch 400 can be controlled individually, the microprocessor 300 is connected with the host computer through the first communication interface and connected with the fast charging integrated module 430 through the second communication end, and can communicate with the host computer to realize the on-off control of the host computer on the fast charging branch 400.

[0033] In some application examples, each power input interface 100 is connected with at least two of the plurality of fast charging branches 400, for example, one power input interface 100 is connected with two, three or more than four fast charging branches 400, so that the power consumption can be dispersed to prevent excessive power consumption and heat generation, and the material cost is reduced.

[0034] For example, the number of the power input interface 100 is four, the number of the fast charging branch 400 is 24, and each power input interface 100 is connected with six fast charging branches 400. For example, each power input interface 100 and each fast charging branch 400 are sequentially numbered, i.e. the serial number of the power input interface 100 is 1 to 4 (for example, the power input interface 100 is connected with the fast charging branches 400 numbered 1 to 6, the power input interface 100 is connected with the fast charging branches 400 numbered 7 to 12, the power input interface 100 is connected with the fast charging branches 400 numbered 13 to 18, and the power input interface 100 is connected with the fast charging branches 400 numbered 19 to 24. Figure 1As shown by the markings P1~P4 in the diagram, the fast charging branches are numbered 1 to 24. The step-down control module 410 of the fast charging branches 400 numbered 1 to 6 is connected to the power input interface 100 numbered 1; the step-down control module 410 of the fast charging branches 400 numbered 7 to 12 is connected to the power input interface 100 numbered 2, and so on. One power input interface 100 connects to 6 fast charging branches 400, which can support multi-channel fast charging and also distribute power consumption to prevent excessive power concentration and heat generation.

[0035] Please refer to Figure 2 Each power input interface 100 is connected to a surge protection module 500. In response to sudden spikes in current or voltage caused by external interference in the circuit, the surge protection module 500 can conduct and shunt the current in a very short time, thereby preventing damage to the circuit from the surge current. In some application examples, the surge protection module 500 includes a TVS diode (such as...). Figure 2 As shown in the diagram (D2), the first terminal of the TVS diode is connected to the power input interface 100, and the second terminal is connected to the reference voltage terminal (such as ground). A TVS diode, also known as a transient voltage suppressor, can change its high impedance to low impedance at picosecond speeds when subjected to a reverse transient high-energy surge, absorbing surge power up to several kilowatts and maintaining the voltage level between its terminals at a predetermined value. This effectively protects electronic components in the circuit from damage caused by surge pulses. In some other applications, the surge protection module 500 can be an integrated chip.

[0036] Please refer to Figure 3 The step-down control module 410 includes a first MOSFET (such as...) Figure 3 (as shown by Q6 in the middle) and the second MOSFET (as shown in the middle) Figure 3 (As shown by Q10 in the diagram), the high-voltage terminal of the first MOSFET is connected to the power input interface 100, and the low-voltage terminal of the first MOSFET is connected to the high-voltage terminal of the second MOSFET to serve as the output terminal of the buck control module 410. The low-voltage terminal of the second MOSFET is connected to the reference voltage terminal, and the control terminals of the first and second MOSFETs are connected to the fast charging integrated module 430. The fast charging integrated module 430 can control the first and second MOSFETs respectively, thereby controlling the output current. Here, the high-voltage terminal of a MOSFET refers to the terminal connected to a high potential, such as the drain of an N-type MOSFET or the source of a P-type MOSFET; the low-voltage terminal of a MOSFET refers to the terminal connected to a low potential, such as the source of an N-type MOSFET or the drain of a P-type MOSFET; and the control terminal of a MOSFET refers to the gate of the MOSFET.

[0037] Please refer to Figure 4The pass control module 420 comprises a third MOS tube (as shown by a label 15 in FIG. 4) and a fourth MOS tube (as shown by a label Q5 in FIG. 4), the high-voltage end of the third MOS tube is connected with the output end of the step-down control module 410, the low-voltage end of the third MOS tube is connected to the power output interface 440, the high-voltage end and the control end of the fourth MOS tube are connected with the fast charging integrated module 430 respectively, and the low-voltage end of the fourth MOS tube is connected with the control end of the third MOS tube. Figure 4 The fast charging integrated module 430 controls the third MOS tube through the fourth MOS tube, thereby controlling the on-off of the fast charging branch 400. Figure 4 The fast charging integrated module 430 adopts an integrated circuit module with a model number of SW3538. The integrated circuit module SW3538 is a high-integration multi-fast charging protocol charging chip, integrates a 7A high-efficiency synchronous step-down converter, supports PPS / PD / QC / AFC / FCP / SCP / PE / SFCP / TFCP / VOOC and other mainstream fast charging protocols on the market, supports a maximum output power of 140W, and integrates CC (constant current) / CV (constant voltage) modes. The fast charging integrated module 430, the step-down control module 410 and the pass control module 420 form a complete high-performance multi-fast charging protocol charging branch. The integrated circuit module SW3538 can automatically identify the fast charging protocol output voltage according to the levels of the CC, DP and DM pins of the power output interface 440 (a USB connector). The microprocessor 300 communicates with the fast charging integrated module 430 through an I2C protocol, and communicates with the upper computer through a serial port, can read the voltage signal, the current signal and the fast charging protocol of each port, and can set the output power and control the output on-off. Please refer to

[0038] The fast charging integrated module 430 is further connected with a fast charging protocol decoding module 450, thereby decoding different protocols. Figure 3

[0039] The above describes the embodiments of the utility model in detail in combination with the drawings, but the utility model is not limited to the above embodiments, and various changes can be made within the knowledge range possessed by those skilled in the art without departing from the purpose of the utility model.​

Claims

1. A multi-channel fast charging circuit, characterized in that, include: Multiple power input interfaces (100); A voltage regulator module (200) has its input terminal connected to one of the plurality of power input interfaces (100); The microprocessor (300) has its power supply terminal connected to the output terminal of the voltage regulator module (200). The first communication terminal of the microprocessor (300) is connected to a first communication interface (310), which is used to connect to a host computer. A multi-channel fast charging branch (400) is provided. Each fast charging branch (400) includes a step-down control module (410), a channel control module (420), and a fast charging integrated module (430). The input terminal of the step-down control module (410) is connected to the corresponding power input interface (100). The output terminal of the step-down control module (410) is connected to the input terminal of the channel control module (420). The output terminal of the channel control module (420) is connected to a power output interface (440). The control terminals of the step-down control module (410) and the channel control module (420) are respectively connected to the fast charging integrated module (430). The fast charging integrated module (430) is also connected to the second communication terminal of the microprocessor (300).

2. The multi-channel fast charging circuit according to claim 1, characterized in that, Each of the power input interfaces (100) is connected to at least two of the multiple fast charging branches (400).

3. The multi-channel fast charging circuit according to claim 2, characterized in that, The number of power input interfaces (100) is 4, and the number of fast charging branches (400) is 24. Each power input interface (100) is connected to 6 of the fast charging branches (400).

4. The multi-channel fast charging circuit according to claim 1, 2, or 3, characterized in that, Each of the power input interfaces (100) is connected to a surge protection module (500).

5. The multi-channel fast charging circuit according to claim 4, characterized in that, The surge protection module (500) includes a TVS diode, the first end of which is connected to the power input interface (100), and the second end of which is connected to the reference voltage terminal.

6. The multi-channel fast charging circuit according to claim 1, characterized in that, The buck control module (410) includes a first MOSFET and a second MOSFET. The high-voltage terminal of the first MOSFET is connected to the power input interface (100), and the low-voltage terminal of the first MOSFET is connected to the high-voltage terminal of the second MOSFET to serve as the output terminal of the buck control module (410). The low-voltage terminal of the second MOSFET is connected to the reference voltage terminal. The control terminals of the first MOSFET and the second MOSFET are connected to the fast charging integrated module (430).

7. The multi-channel fast charging circuit according to claim 1, characterized in that, The path control module (420) includes a third MOSFET and a fourth MOSFET. The high-voltage terminal of the third MOSFET is connected to the output terminal of the buck control module (410), and the low-voltage terminal of the third MOSFET is connected to the power output interface (440). The high-voltage terminal and the control terminal of the fourth MOSFET are respectively connected to the fast charging integrated module (430), and the low-voltage terminal of the fourth MOSFET is connected to the control terminal of the third MOSFET.

8. The multi-channel fast charging circuit according to any one of claims 1 to 3 or 5 to 7, characterized in that, The fast charging integrated module (430) adopts an integrated circuit module with model number SW3538.

9. The multi-channel fast charging circuit according to claim 8, characterized in that, The fast charging integrated module (430) is also connected to a fast charging protocol decoding module (450).

10. A charging device, characterized in that, Includes the multi-channel fast charging circuit as described in any one of claims 1 to 9.

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