Charging circuit capable of realizing double-port fast charging

Abstract

The utility model discloses a charging circuit capable of double-port fast charging, which comprises a power supply module, a first output port, a second output port, a first output control module and a second output control module, and is characterized in that the first output control module comprises a fifth switch tube of which the input end and the output end are respectively connected with the power supply module and the first output port; the second output port is connected with the power supply module through a second output control module, the second output control module comprises a first switch tube, a second switch tube, a third switch tube, a fourth switch tube, a sixth switch tube and an inductor, and the input end of the first switch tube is connected with the power supply module; the output end of the first switching tube is connected with the input end of the third switching tube and the first end of the inductor, the second end of the inductor is connected with the input end of the fourth switching tube and the output end of the second switching tube, and the output end of the fourth switching tube and the output end of the third switching tube are both grounded. And the input end and the output end of the sixth switch tube are respectively connected with the input end of the second switch tube and the second output port.

Description

Technical Field

[0001] The utility model relates to the technical field of charging circuits, and in particular to a charging circuit capable of dual-port fast charging. Background Art

[0002] In most existing fast charging circuits, a single power source can only perform single-port fast charging, and most fast charging circuits are equipped with multiple step-down units, which affects the overall power conversion efficiency and makes the circuit structure complex. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a charging circuit with a simple structure capable of dual-port fast charging, so as to realize dual-port fast charging.

[0004] In order to solve the above technical problems, the purpose of the utility model is achieved through the following technical solutions: providing a charging circuit capable of dual-port fast charging, comprising a power module, a first output port, a second output port, a first output control module and a second output control module, wherein the power module is electrically connected to the first output port through the first output control module, the first output control module comprises a fifth switch tube, the input end and the output end of the fifth switch tube are respectively connected to the power module and the first output port; the second output port is electrically connected to the power module through the second output control module, the second output control module comprises a first switch tube, a second switch tube, a third switch tube, a fourth switch tube, a sixth switch tube and an inductor, the input end of the first switch tube is connected to the power module, the output end of the first switch tube is connected to the input end of the third switch tube and the first end of the inductor, the second end of the inductor is connected to the input end of the fourth switch tube and the output end of the second switch tube, the output end of the fourth switch tube and the output end of the third switch tube are both grounded, the input end of the second switch tube is connected to the input end of the sixth switch tube, and the output end of the sixth switch tube is electrically connected to the second output port.

[0005] Its further technical solution is: the input end of the fifth switch tube and the input end of the first switch tube are both connected to the positive power output end of the power module, the output end of the fifth switch tube is connected to the first pin of the first output port, the output end of the sixth switch tube is connected to the first pin of the second output port, and the negative power output end of the power module, the second pin of the first output port and the second pin of the second output port are all grounded.

[0006] Its further technical solution is: the charging circuit capable of dual-port fast charging also includes a main control unit, and the control ends of the first switch tube, the second switch tube, the third switch tube, the fourth switch tube, the fifth switch tube and the sixth switch tube are respectively connected to the corresponding signal control pins of the main control unit.

[0007] Its further technical solution is: the first switch tube, the second switch tube, the third switch tube, the fourth switch tube, the fifth switch tube and the sixth switch tube are all NMOS tubes, the drain and source of the fifth switch tube are respectively connected to the positive power output end of the power module and the first pin of the first output port, the drain of the first switch tube is connected to the positive power output end of the power module, the source of the first switch tube is connected to the drain of the third switch tube and the first end of the inductor, the second end of the inductor is connected to the drain of the fourth switch tube and the source of the second switch tube, the source of the fourth switch tube and the source of the third switch tube are both grounded, the drain of the second switch tube is connected to the drain of the sixth switch tube, and the source of the sixth switch tube is electrically connected to the first pin of the second output port.

[0008] A further technical solution is as follows: the power module comprises an AC / DC conversion unit, and the positive output terminal and the negative output terminal of the AC / DC conversion unit serve as the positive power output terminal and the negative power output terminal of the power module respectively.

[0009] A further technical solution is: the inductor is a power inductor.

[0010] The beneficial technical effect of the present invention is that the dual-port fast-charging charging circuit of the present invention is configured with a first output control module and a second output control module respectively connected to the first output port and the second output port to independently control the output voltages of the first output port and the second output port respectively, the second output control module includes a plurality of switching tubes and an inductor that cooperate with each other, so as to output corresponding voltages according to the requirements of the corresponding connected terminal equipment, the output voltages between the two output ports do not affect each other, and the two output ports can realize fast charging at the same time, and the two output ports both obtain voltage directly from the power supply module, which reduces the setting of the step-down circuit, thereby reducing the loss, improving the overall power conversion efficiency of the circuit, and the circuit structure is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0012] Figure 1 A circuit diagram of a charging circuit capable of dual-port fast charging provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0013] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0014] See also Figure 1 , Figure 1 A circuit diagram of a dual-port fast-chargeable charging circuit provided in an embodiment of the utility model, wherein the dual-port fast-chargeable charging circuit comprises a power module 11, a first output port USB1, a second output port USB2, a first output control module 12, and a second output control module 13. The power module 11 is electrically connected to the first output port USB1 through the first output control module 12. The first output control module 12 comprises a fifth switch tube Q5. The input end and the output end of the fifth switch tube Q5 are respectively connected to the power module 11 and the first output port USB1; the second output port USB2 is electrically connected to the power module 11 through the second output control module 13. The second output control module 13 comprises a A first switch tube Q1, a second switch tube Q2, a third switch tube Q3, a fourth switch tube Q4, a sixth switch tube Q6 and an inductor L1, the input end of the first switch tube Q1 is connected to the power module 11, the output end of the first switch tube Q1 is connected to the input end of the third switch tube Q3 and the first end of the inductor L1, the second end of the inductor L1 is connected to the input end of the fourth switch tube Q4 and the output end of the second switch tube Q2, the output end of the fourth switch tube Q4 and the output end of the third switch tube Q3 are both grounded, the input end of the second switch tube Q2 is connected to the input end of the sixth switch tube Q6, and the output end of the sixth switch tube Q6 is electrically connected to the second output port USB2.

[0015] Among them, the fifth switch tube Q5 and the sixth switch tube Q6 are output control switches of the first output port USB1 and the second output port USB2 respectively. When a terminal device is connected to the first output port USB1, the fifth switch tube Q5 is turned on, and when the terminal device has a charging abnormality or a fault, the fifth switch tube Q5 is turned off to play a protective role. When a terminal device is connected to the second output port USB2, the sixth switch tube Q6 is turned on, and when the terminal device has a charging abnormality or a fault, the sixth switch tube Q6 is turned off to play a protective role. The dual-port fast-charging charging circuit is configured with a first output control module 12 and a second output control module 13 respectively connected to the first output port USB1 and the second output port USB2 to independently control the output voltages of the first output port USB1 and the second output port USB2. The second output control module 13 includes a plurality of switching tubes and an inductor L1 that cooperate with each other to output corresponding voltages according to the requirements of the corresponding connected terminal equipment. The output voltages between the two output ports do not affect each other, and the two output ports can achieve fast charging at the same time. Moreover, the two output ports both obtain voltage directly from the power module 11, which reduces the setting of the step-down circuit, thereby reducing the loss, improving the overall power conversion efficiency of the circuit, and the circuit structure is simple.

[0016] Specifically, the input end of the fifth switch tube Q5 and the input end of the first switch tube Q1 are both connected to the positive power output end Vbus of the power module 11, the output end of the fifth switch tube Q5 is connected to the first pin of the first output port USB1, the output end of the sixth switch tube Q6 is connected to the first pin of the second output port USB2, and the negative power output end GND of the power module 11, the second pin of the first output port USB1, and the second pin of the second output port USB2 are all grounded.

[0017] Specifically, in the present embodiment, the first switch tube Q1, the second switch tube Q2, the third switch tube Q3, the fourth switch tube Q4, the fifth switch tube Q5 and the sixth switch tube Q6 are all NMOS tubes, the drain and source of the fifth switch tube Q5 are respectively connected to the positive power output terminal Vbus of the power module 11 and the first pin of the first output port USB1, the drain of the first switch tube Q1 is connected to the positive power output terminal Vbus of the power module 11, the source of the first switch tube Q1 is connected to the drain of the third switch tube Q3 and the first end of the inductor L1, the second end of the inductor L1 is connected to the drain of the fourth switch tube Q4 and the source of the second switch tube Q2, the source of the fourth switch tube Q4 and the source of the third switch tube Q3 are both grounded, the drain of the second switch tube Q2 is connected to the drain of the sixth switch tube Q6, and the source of the sixth switch tube Q6 is electrically connected to the first pin of the second output port USB2. Among them, the first output port USB1 and the second output port USB2 are USB interfaces, the first switch tube Q1, the second switch tube Q2, the third switch tube Q3, the fourth switch tube Q4, the fifth switch tube Q5 and the sixth switch tube Q6 are all NMOS tubes, the withstand voltage of the fifth switch tube Q5 and the sixth switch tube Q6 is greater than the maximum output voltage of the USB interface, and the fifth switch tube Q5 and the sixth switch tube Q6 only have conduction loss. In order to ensure the stability of the circuit operation, the first switch tube Q1, the second switch tube Q2, the third switch tube Q3 and the fourth switch tube Q4 are selected as NMOS tubes of the same specification, and the withstand voltage of the first switch tube Q1, the second switch tube Q2, the third switch tube Q3 and the fourth switch tube Q4 should be greater than the maximum output voltage of the USB interface and the output voltage of the positive power output terminal Vbus of the power module 11.

[0018] Specifically, in this embodiment, the dual-port fast-charging charging circuit also includes a main control unit, and the control ends of the first switch tube Q1, the second switch tube Q2, the third switch tube Q3, the fourth switch tube Q4, the fifth switch tube Q5 and the sixth switch tube Q6 are respectively connected to the corresponding signal control pins of the main control unit, and the gates of the first switch tube Q1, the second switch tube Q2, the third switch tube Q3, the fourth switch tube Q4, the fifth switch tube Q5 and the sixth switch tube Q6 are respectively connected to the corresponding signal control pins of the main control unit.

[0019] Specifically, in this embodiment, the power module 11 includes an AC-DC conversion unit AC-DC, and the positive output terminal and the negative output terminal of the AC-DC conversion unit AC-DC serve as the positive power output terminal Vbus and the negative power output terminal GND of the power module 11 respectively.

[0020] Specifically, in this embodiment, the inductor L1 is a power inductor. The inductor L1 may have a magnetic core. The magnetic core may be made of a material with low core loss, such as commonly used Sendust or Iron-Ni.

[0021] Based on the above design, the working process is as follows:

[0022] When only the first output port outputs voltage, the first output control module is turned on, the fifth switch tube is turned on, the second output control module is turned off, the first switch tube, the second switch tube, the third switch tube, the fourth switch tube and the sixth switch tube are turned off, and the inductor does not work;

[0023] When only the second output port outputs voltage, the first output control module is turned off, the fifth switch tube is turned off, the first switch tube, the second switch tube and the sixth switch tube in the second output control module are turned on, and the inductor works, while the third switch tube and the fourth switch tube are turned off;

[0024] When both the first output port and the second output port output voltage and the output voltage of the first output port is greater than the output voltage of the second output port, the first output control module is turned on, the fifth switch tube is turned on, the output voltage of the first output port is equal to the output voltage of the positive output terminal of the AC / DC conversion unit, the second switch tube and the sixth switch tube are turned on, the fourth switch tube is turned off, the first switch tube, the third switch tube and the inductor form a BUCK circuit, and the output voltage of the second output port is the product of the duty cycle of the first switch tube when it is turned on and the output voltage of the positive output terminal of the AC / DC conversion unit;

[0025] When both the first output port and the second output port output voltages and the output voltage of the first output port is less than the output voltage of the second output port, the first output control module is turned on, the fifth switch tube is turned on, the output voltage of the first output port is equal to the output voltage of the positive output terminal of the AC / DC conversion unit, the first switch tube and the sixth switch tube are turned on, the third switch tube is turned off, the second switch tube, the fourth switch tube and the inductor form a Boost circuit, and the output voltage of the second output port is the quotient obtained by dividing the output voltage of the positive output terminal of the AC / DC conversion unit by the proportion of the off-time of the fourth switch tube in a single working cycle;

[0026] When the first output port and the second output port both output voltages and the output voltage of the first output port is equal to the output voltage of the second output port, the first output control module is turned on, the fifth switch tube is turned on, the first switch tube, the second switch tube and the sixth switch tube are turned on, the inductor works, the third switch tube and the fourth switch tube are turned off, and the output voltage of the first output port and the output voltage of the second output port are both equal to the output voltage of the positive output terminal of the AC / DC conversion unit.

[0027] In summary, the dual-port fast-charging charging circuit of the utility model is configured with a first output control module and a second output control module respectively connected to the first output port and the second output port to independently control the output voltages of the first output port and the second output port respectively. The second output control module includes a plurality of switching tubes and an inductor that cooperate with each other, so as to output corresponding voltages according to the requirements of the corresponding connected terminal equipment. The output voltages between the two output ports do not affect each other, and the two output ports can realize fast charging at the same time. Moreover, both output ports obtain voltage directly from the power supply module, which reduces the setting of the step-down circuit, thereby reducing the loss and improving the overall power conversion efficiency of the circuit. The circuit structure is simple.

[0028] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the utility model, and these modifications or replacements should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A dual-port fast charging charging circuit, characterized in that: The invention comprises a power supply module, a first output port, a second output port, a first output control module and a second output control module, wherein the power supply module is electrically connected to the first output port through the first output control module, the first output control module comprises a fifth switch tube, the input end and the output end of the fifth switch tube are respectively connected to the power supply module and the first output port; the second output port is electrically connected to the power supply module through the second output control module, the second output control module comprises a first switch tube, a second switch tube, a third switch tube, a fourth switch tube, a sixth switch tube and an inductor, the input end of the first switch tube is connected to the power supply module, the output end of the first switch tube is connected to the input end of the third switch tube and the first end of the inductor, the second end of the inductor is connected to the input end of the fourth switch tube and the output end of the second switch tube, the output end of the fourth switch tube and the output end of the third switch tube are both grounded, the input end of the second switch tube is connected to the input end of the sixth switch tube, and the output end of the sixth switch tube is electrically connected to the second output port.

2. The dual-port fast charging charging circuit according to claim 1, characterized in that: The input end of the fifth switch tube and the input end of the first switch tube are both connected to the positive power output end of the power module, the output end of the fifth switch tube is connected to the first pin of the first output port, the output end of the sixth switch tube is connected to the first pin of the second output port, and the negative power output end of the power module, the second pin of the first output port, and the second pin of the second output port are all grounded.

3. The dual-port fast charging charging circuit according to claim 2, characterized in that: The dual-port fast-charging charging circuit also includes a main control unit, and the control ends of the first switch tube, the second switch tube, the third switch tube, the fourth switch tube, the fifth switch tube and the sixth switch tube are respectively connected to the corresponding signal control pins of the main control unit.

4. The dual-port fast charging charging circuit according to claim 2, characterized in that: The first switch tube, the second switch tube, the third switch tube, the fourth switch tube, the fifth switch tube and the sixth switch tube are all NMOS tubes. The drain and source of the fifth switch tube are respectively connected to the positive power output terminal of the power module and the first pin of the first output port. The drain of the first switch tube is connected to the positive power output terminal of the power module. The source of the first switch tube is connected to the drain of the third switch tube and the first end of the inductor. The second end of the inductor is connected to the drain of the fourth switch tube and the source of the second switch tube. The source of the fourth switch tube and the source of the third switch tube are both grounded. The drain of the second switch tube is connected to the drain of the sixth switch tube, and the source of the sixth switch tube is electrically connected to the first pin of the second output port.

5. The dual-port fast charging charging circuit according to claim 2, characterized in that: The power module comprises an AC / DC conversion unit, and the positive output terminal and the negative output terminal of the AC / DC conversion unit serve as the positive power output terminal and the negative power output terminal of the power module respectively.

6. The dual-port fast charging charging circuit according to claim 1, characterized in that: The inductor is a power inductor.

Images