CN113555915A

CN113555915A - Charging circuit

Info

Publication number: CN113555915A
Application number: CN202010333364.7A
Authority: CN
Inventors: 张磊
Original assignee: Shenyang Chenxun Simcom Technology Co Ltd
Current assignee: Shenyang Chenxun Simcom Technology Co Ltd
Priority date: 2020-04-24
Filing date: 2020-04-24
Publication date: 2021-10-26

Abstract

An embodiment of the present invention provides a charging circuit, including: the terminal comprises a first port used for being connected with a terminal, a second port used for being connected with a charger and a third port used for being connected with load equipment, wherein the terminal and the charger are used for supplying power to the load equipment; and the protocol chip is used for acquiring whether the second port is connected with the charger or not, and controlling the terminal to stop supplying power and controlling the charger to start supplying power when the second port is connected with the charger. The invention is beneficial to improving the use experience of the terminal.

Description

Charging circuit

Technical Field

The embodiment of the invention relates to the field of electronic equipment, in particular to a charging circuit.

Background

With the spread of load devices such as AR and the diversification of functions of load devices, load devices such as AR have come to be applied to the fields of industry and games as one kind of accessories of daily terminals. Therefore, the performance of load equipment such as AR and the performance of a daily terminal can be integrated, and a user has better use experience.

In an actual application scenario, a terminal generally needs to communicate with load devices such as an AR and the like, and also needs to supply power to the load devices, and transmit power to other devices while operating, which may cause performance problems such as reduction in processing efficiency and heat generation of the terminal.

Disclosure of Invention

The embodiment of the invention provides a charging circuit which is beneficial to solving the performance problem caused by the fact that a terminal needs to supply power to load equipment while operating.

To solve the above problem, an embodiment of the present invention provides a charging circuit, including: the terminal comprises a first port used for being connected with a terminal, a second port used for being connected with a charger and a third port used for being connected with load equipment, wherein the terminal and the charger are used for supplying power to the load equipment; and the protocol chip is used for acquiring whether the second port is connected with the charger or not, and controlling the terminal to stop supplying power and controlling the charger to start supplying power when the second port is connected with the charger.

In addition, the charging circuit further includes: a switch connected in series between the first port and the third port, the terminal supplying power to the load device during a period when the switch is turned on; the switch is connected with the protocol chip, and the protocol chip is used for acquiring whether the third port is connected with the load equipment or not and is also used for controlling the switch to be conducted during the period that the third port is connected with the load equipment.

In addition, the switch comprises a PMOS tube, and the grid electrode of the PMOS tube is connected with the protocol chip.

In addition, the protocol chip is used for transmitting the first port and the third port, and the terminal is used for identifying whether the third port is connected with the load device or not and transmitting an identification result to the protocol chip.

In addition, the charging circuit further includes: the protocol chip is further used for controlling the first load switch to be switched on when the second port is connected with the charger and controlling the first load switch to be switched off when the charger stops supplying power.

In addition, the first load switch has a first current threshold, and after the second port is connected to the charger, the first load switch is configured to be turned off when the input current is greater than the first current threshold and turned on when the input current is less than or equal to the first current threshold.

In addition, the charging circuit further includes: a voltage reduction module connected in series between the second port and the first load switch.

In addition, the charging circuit further includes: the protocol chip is further used for controlling the second load switch to be switched on when the third port is connected with the load equipment and controlling the second load switch to be switched off when the load equipment is disconnected with the third port.

In addition, the charging circuit further includes: and the protocol chip is also used for controlling the power supply module to supply power to the load equipment when the power consumption of the load equipment is greater than the power supply power of the terminal or the power supply power of the charger.

In addition, the power supply module comprises a power supply converter and a battery, the power supply converter is connected between the first port and the battery in series and connected between the second port and the battery in series, and the terminal and the charger are also used for supplying power to the battery.

In addition, the power supply converter is connected between the first port and the third port in series and between the second port and the third port in series; the power supply converter further has a step-down function, and the charging circuit further includes: and the boosting module is connected between the power supply converter and the third port in series.

In addition, the charger is further used for supplying power to the terminal, and the protocol chip is further used for controlling the charger to simultaneously supply power to the load equipment and the terminal.

Compared with the prior art, the technical scheme provided by the embodiment of the invention has the following advantages:

above-mentioned technical scheme provides a charging circuit, can connect charger and terminal simultaneously, and can control the terminal and stop the power supply and control the charger and begin the power supply after charging circuit connects the charger, so, the terminal need not outside power supply when self operation, is favorable to promoting the use experience at terminal.

In addition, the PMOS tube is used as a switch, and current can still pass through the PMOS tube in a cut-off state, so that the output of the terminal can be adjusted by controlling the conduction or the cut-off of the PMOS tube, and the effect of saving the power of the terminal is further achieved.

In addition, the protocol chip transparently transmits the first port and the third port, so that whether the accessed load equipment is qualified or not is determined by the terminal, and the terminal can identify different types of load equipment according to different types and settings, thereby realizing effective correspondence between the terminal and the load equipment; in addition, the information processing capability of the terminal is generally higher than that of the protocol chip, so that the connection efficiency of the load device and the terminal is improved.

Drawings

One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.

Fig. 1 is a circuit diagram of a charging circuit according to an embodiment of the invention;

fig. 2 and fig. 3 are schematic circuit diagrams of a charging circuit according to another embodiment of the present invention;

fig. 4 is a circuit diagram of a charging circuit according to another embodiment of the present invention;

fig. 5 is a circuit diagram of another charging circuit according to another embodiment of the invention.

Detailed Description

As known from the background art, when the terminal operates, power is supplied to other devices, which may cause performance problems such as reduction in processing efficiency or heat generation, and further cause reduction in usage experience of the terminal.

In order to solve the above problems, the present invention provides a charging circuit, which can be connected to a charger and a terminal at the same time, and can control the terminal to stop supplying power and control the charger to start supplying power after the charging circuit is connected to the charger, so that the terminal can only maintain its operation without performing a power supply task, thereby reducing the influence of the power supply task on the terminal processing performance and the heating control, and facilitating the improvement of the terminal use experience.

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that in various embodiments of the invention, numerous technical details are set forth in order to provide a better understanding of the present application. However, the technical solution claimed in the present application can be implemented without these technical details and various changes and modifications based on the following embodiments.

Fig. 1 is a circuit diagram of a charging circuit according to an embodiment of the invention.

Referring to fig. 1, the charging circuit includes: a first port 111 for connecting the terminal 110, a second port 121 for connecting the charger 120, and a third port 131 for connecting the load device 130, the terminal 110 and the charger 120 being for supplying power to the load device 130; and the protocol chip 14, wherein the protocol chip 14 is used for acquiring whether the second port 121 is connected with the charger 120, and for controlling the terminal 110 to stop supplying power and controlling the charger 120 to start supplying power when the second port 121 is connected with the charger 120.

In this embodiment, the output end of the first port 111 is connected to the input end of the third port 131, and the terminal 110 supplies power to the load device 130 through the first port 111 and the third port 131; the output end of the second port 121 is connected with the input end of the third port 131, and the charger 120 supplies power to the load device 130 through the second port 121 and the third port 131.

In this embodiment, the output end of the first port 111 and the output end of the second port 121 are connected to the protocol chip 14, and the terminal 110 and the charger 120 are further configured to supply power to the protocol chip 14; in addition, the protocol chip 14 is further configured to pass through the first port 111 and the third port 131, so that the terminal 110 can receive a data packet containing device information sent by the load device 130, and the terminal 110 verifies, through the data packet, whether the accessed device is the load device 130 compliant with the adaptation.

Thus, whether the accessed load device 130 is qualified or not is determined by the terminal 110, and the terminal 110 can identify different types of load devices according to different types and settings, so that the terminal 110 and the load device 130 are effectively corresponding; in addition, the terminal 110 may generally perform data update in a networking manner, so as to quickly identify the target load device 130, which is beneficial to improving the connection efficiency between the terminal 110 and the load device 130; in addition, the information processing capability of the terminal 110 is generally higher than that of the protocol chip 14, which is beneficial to improving the connection efficiency between the load device 130 and the terminal 110.

The terminal 110 comprises electronic equipment for direct charging and direct discharging and electronic equipment with a power storage function, and the terminal 110 for direct charging and direct discharging comprises a sound box, a television, a desktop computer and the like; the terminal 110 with the power storage function includes a mobile phone, a tablet, a notebook computer, and the like. Further, the charger 120 may be a charging head or a terminal device having a power supply function; the load device 130 may be an electronic device for direct charging or an electronic device having an electric power storage function.

The operating principle of the charging circuit will be explained in detail below by means of a connection sequence thereof.

Firstly, the method comprises the following steps: the terminal 110 is connected to a first port 111.

After being connected to the first port 111, the terminal 110 supplies power to the protocol chip 14 through the first port 111, so that the protocol chip 14 can enter an operating state. After entering the working state, the protocol chip 14 transparently transmits the first port 111 and the third port 131, so that the terminal 110 can receive a data packet containing device information sent by the load device 130; meanwhile, the protocol chip 14 is also used to acquire whether the second port 121 is connected with the charger 120.

II, secondly: the load device 130 is connected to the third port 131.

After the load device 130 is connected to the third port 131, the terminal 110 sends identity query information to the load device 130, and the load device 130 sends a data packet containing device information to the terminal 110; after verifying the data packet, the terminal 110 sends the verification result to the protocol chip 14; when the verification result is "pass", the protocol chip 14 controls the terminal 110 to simultaneously supply power to the protocol chip 14 and the load device 130, and meanwhile, the terminal 110 is in communication connection with the load device 130 to perform information interaction.

Thirdly, the method comprises the following steps: the charger 120 is connected to the second port 121.

After the protocol chip 14 acquires that the charger 120 is connected to the second port 121, a power switching command is sent to the terminal 110, so that the terminal 110 stops supplying power and the charger 120 starts supplying power.

In this embodiment, the first port 111 is further connected to the second port 121, and the terminal 110 is an electronic device capable of storing electricity; after the terminal 110 stops supplying power, the protocol chip 14 is further used for controlling the charger 120 to simultaneously supply power to the terminal 110 and the load device 130, so as to improve the endurance of the terminal 110.

In this embodiment, the first port 111, the second port 121, and the third port 131 have a common connection point 15 therebetween. The first port 111, the second port 121 and the third port 131 are TYPE-C interfaces and comply with a power switching protocol; in other embodiments, the first port, the second port, and the third port may also be USB or the like type interfaces.

In this embodiment, the charging circuit can connect the charger 120 and the terminal 110 at the same time, and can control the terminal 110 to stop supplying power and control the charger 120 to start supplying power after the charging circuit connects the charger 120, so, the terminal 110 does not need to supply power outwards while running, thereby ensuring that the performance of the terminal 110 is not affected by the power supply program, and being beneficial to improving the use experience of the terminal 110.

Another embodiment of the present invention further provides a charging circuit, which is different from the previous embodiment in that the charging circuit further includes a switch, a first load switch, and a second load switch. Fig. 2 and 3 are schematic circuit diagrams of a charging circuit according to another embodiment of the present invention. The same or corresponding parts as those in the previous embodiment may refer to the corresponding descriptions in the previous embodiment, and are not described in detail below.

In this embodiment, the charging circuit includes: a switch 212, the switch 212 being connected in series between the first port 211 and the third port 231, the terminal 210 supplying power to the load device 230 during the on period of the switch 212; the switch 212 is connected to the protocol chip 24, and the protocol chip 24 is configured to obtain whether the third port 231 is connected to the load device 230, and further configured to control the switch 212 to be turned on during the connection of the third port 231 to the load device 230.

In this embodiment, the switch 212 is a PMOS transistor, a gate of the PMOS transistor is connected to the protocol chip 24, the PMOS transistor has a conducting state and a blocking state, and the PMOS transistor is in the blocking state by default. When the third port 231 is empty, the PMOS transistor is in a cut-off state, and the current output by the terminal 210 and passing through the PMOS transistor is small and is only used for supplying power to the protocol chip 24; when the load device 230 is connected to the third port 231, the protocol chip 24 sends a first instruction S1 to the PMOS transistor, so that the PMOS transistor is turned on, and at this time, the current output by the terminal 210 through the PMOS transistor is large, and power is supplied to the protocol chip 24 and the load device 230. In this way, the switch 212 is controlled to be turned on or off, so that the power of the terminal 210 can be saved.

In this embodiment, the charging circuit includes: and a first load switch 223, wherein the first load switch 223 is connected in series between the second port 221 and the third port 231, and the protocol chip 24 controls the first load switch 223 to be turned on when the second port 221 is connected with the charger 220, and controls the first load switch 223 to be turned off when the charger 220 is disconnected from the second port 221.

The connection between the charger 220 and the second port 221 means that the charger 220 is in a power output state, and the voltage at the input terminal of the second port 221 is high level; the disconnection of the second port 221 from the charger 220 means that the charger 220 no longer supplies power, i.e., the voltage at the input terminal of the second port 221 is low, and it should be noted that when the charger 220 itself fails or a short circuit occurs between the charger 220 and the second port 221, the charger 220 may no longer supply power.

Specifically, the protocol chip 24 includes a detection module 241a, and the detection module 241a is connected to the first load switch input 223a and is configured to detect a voltage at the first load switch input 223 a; further comprising: and the control module 241b is connected with the detection module 241a, and is configured to obtain the voltage of the first load switch input end 223a, and control the first load switch 223 to be turned on or off based on the voltage of the first load switch input end 223 a.

When the voltage potential of the first load switch input terminal 223a is at a low level, the charger 220 may stop supplying power, and at this time, the protocol chip 24 sends the second instruction S2 to control the first load switch 223 to turn off, so as to prevent the electric energy of the terminal 210 from flowing to the second port 221, which is beneficial to saving the electric energy of the terminal 210; correspondingly, when the voltage potential at the first load switch input terminal 223a is at a high level, the charger 220 is considered to be connected to the second port 221, and the protocol chip 24 sends the second instruction S2 to control the first load switch 223 to be turned on, so that the charger 220 can supply power to the load device 230 and the terminal 210.

In addition, the first load switch 223 has a first current threshold, when the second port 221 is connected to the charger 220, if the current at the input end of the first load switch 223 is greater than the first current threshold, the first load switch 223 is turned off; if the current at the input of the first load switch 223 is less than or equal to the first current threshold, the first load switch 223 is turned on.

The first current threshold may be determined by the load device 230, i.e., the first current threshold may be different for different load devices 230, and the first current threshold may be manually or automatically adjusted according to the type of the load device 230.

In other embodiments, the first load switch further has a first voltage threshold, and the first load switch is turned off when the voltage at the input terminal of the first load switch is greater than the first voltage threshold; the first load switch is turned on when the voltage at the input terminal of the first load switch is less than or equal to a first voltage threshold.

In this embodiment, the charging circuit further includes: the voltage dropping module 222 is connected in series between the second port 221 and the first load switch 223, and the voltage dropping module 222 is configured to drop the output voltage of the charger 220 to a preset voltage, where the preset voltage may be a fixed value or a variable value adjusted according to a parameter of the load device 230.

For example, in one case, the predetermined voltage is a fixed value of 7.5V, and when the voltage at the output terminal of the charger 220 is 10V or 20V, the voltage at the output terminal of the voltage-decreasing module 222 is always 7.5V; in another case, the preset voltage is equal to the rated voltage of the load device 230, and when the rated voltage of the load device 230 is 5V and the output voltage of the charger 220 is 10V or 20V, the output voltage of the voltage-reducing module 222 is 5V.

Thus, the output voltage of the charger 220 can be reduced, and the charging circuit is prevented from being influenced by overvoltage; meanwhile, the chargers 220 having different output voltages are enabled to be connected to the charging circuit and supply power.

The voltage reducing module 222 has an enable end 222a, the enable end 222a is connected to the output end of the second port 221, and the charger 220 supplies power to the voltage reducing module 222 through the enable end 222a, so that the voltage reducing module 222 enters a working state; in addition, a resistor is connected in series between the enable end 222a and the second port 221, so as to perform the functions of current limiting and voltage dividing, thereby preventing the enable end 222a from overcurrent or overvoltage, and further ensuring the safety of the voltage reduction module 222.

In this embodiment, the charging circuit includes: a second load switch 232, the second load switch 232 being connected between the first port 211 and the third port 231 and between the second port 221 and the third port 231, the protocol chip 24 sending a third instruction S3 to control the second load switch 232 to be turned on when the third port 231 is connected to the load device 230, and sending a third instruction S3 to control the third port 231 to be turned off when the third port 231 is disconnected from the load device 230.

The disconnection of the load device 230 includes hardware disconnection, shutdown, and the like, that is, the load device 230 does not depend on the charging circuit provided in this embodiment to work; in addition, since the terminal 210 may interact with the load device 230 in a communication manner, after the load device 230 is disconnected from the third port 231, the terminal 210 can no longer receive the message sent by the load device 230, the terminal 210 cannot send the identity query information to the disconnected load device 230, and after the terminal 210 cannot identify the load device 230, the identification result is sent to the protocol chip 24, and the protocol chip 24 controls the second load switch 232 to be disconnected according to the identification result.

In addition, the second load switch 232 has a second voltage threshold, and when the third port 231 is connected to the load device 230, if the voltage exceeds the second voltage threshold, the second load switch 232 is turned off; if the voltage is less than or equal to the second voltage threshold, the second load switch 232 is turned on. In other embodiments, the second load switch also has a second current threshold.

In this embodiment, the switch 212 is provided to save the power of the terminal 210; the provision of the first load switch 223 and the second load switch 232 is advantageous for ensuring the safety of the charging circuit.

Another embodiment of the present invention further provides a charging circuit, which is different from the previous embodiment, in this embodiment, the charging circuit further includes a power supply module and a delay chip. Fig. 4 is a circuit schematic diagram of a charging circuit according to another embodiment of the present invention, and fig. 5 is a circuit schematic diagram of a charging circuit according to another embodiment of the present invention. The same or corresponding parts as those in the previous embodiment may refer to the corresponding descriptions in the previous embodiment, and are not described in detail below.

Referring to fig. 4, the charging circuit further includes: and a power supply module 35, wherein the power supply module 35 is connected to the third port 331, and the protocol chip 34 is further configured to control the power supply module 35 to supply power to the load device 330 during a period when the power consumption of the load device 330 is greater than the power supply of the terminal 310 or the power supply of the charger 320.

Specifically, the power supply module 35 includes a power supply converter 351 and a battery 352, the power supply converter 351 is connected in series between the first port 311 and the battery 352 and between the second port 321 and the battery 352, and the terminal 310 and the charger 320 are also used for supplying power to the battery 352.

In the charging circuit of this embodiment, the power converter 351 has a current limiting function, and the power converter 351 is connected in series between the first port 311 and the third port 331, and is connected in series between the second port 321 and the third port 331. Therefore, the overcurrent of the current at the input end of the third port 331 is avoided, and the safety of the load device 330 is further ensured; referring to fig. 5, in another charging circuit of this embodiment, the power supply converter 351a does not have a current limiting function, and the output terminals of the switch and the first load switch are connected to the input terminal of the power supply converter 351a and to the input terminal of the second load switch.

In this embodiment, the charging circuit further includes: and the boosting module 36, wherein the boosting module 36 is connected in series between the power supply converter 351 and the third port 331. Because the conventional power converter 351 often has a voltage reduction effect, that is, the output voltage is lower than the input voltage, the current of the input terminal of the third port 331 is limited by adding the boost module 36, and the voltage of the input terminal of the third port 331 is ensured to meet the requirement of the power supply voltage of the load device 330.

In this embodiment, the power supply module 35 is arranged to enable the load device 330 to operate normally when the power supplied by the terminal 310 or the charger 320 is insufficient.

It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples for carrying out the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in practice. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A charging circuit, comprising:

the terminal comprises a first port used for being connected with a terminal, a second port used for being connected with a charger and a third port used for being connected with load equipment, wherein the terminal and the charger are used for supplying power to the load equipment;

and the protocol chip is used for acquiring whether the second port is connected with the charger or not, and controlling the terminal to stop supplying power and controlling the charger to start supplying power when the second port is connected with the charger.

2. The charging circuit of claim 1, further comprising: a switch connected in series between the first port and the third port, the terminal supplying power to the load device during a period when the switch is turned on; the switch is connected with the protocol chip, and the protocol chip is used for acquiring whether the third port is connected with the load equipment or not and is also used for controlling the switch to be conducted during the period that the third port is connected with the load equipment.

3. The charging circuit of claim 2, wherein the switch comprises a PMOS transistor, a gate of the PMOS transistor being connected to the protocol chip.

4. The charging circuit of claim 2, wherein the protocol chip is configured to transparently transmit the first port and the third port, and the terminal is configured to identify whether the third port is connected to the load device and transmit an identification result to the protocol chip.

5. The charging circuit of claim 1, further comprising: the protocol chip is further used for controlling the first load switch to be switched on when the second port is connected with the charger and controlling the first load switch to be switched off when the second port is disconnected with the charger.

6. The charging circuit of claim 5, wherein the first load switch has a first current threshold, and wherein the first load switch is configured to turn off when the input current is greater than the first current threshold and turn on when the input current is less than or equal to the first current threshold after the second port is coupled to the charger.

7. The charging circuit of claim 5, further comprising: a voltage reduction module connected in series between the first port and the first load switch.

8. The charging circuit of claim 1, further comprising: the protocol chip is further used for controlling the second load switch to be switched on when the third port is connected with the load equipment and controlling the second load switch to be switched off when the load equipment is disconnected with the third port.

9. The charging circuit of claim 1, further comprising: and the protocol chip is also used for controlling the power supply module to supply power to the load equipment when the power consumption of the load equipment is greater than the power supply power of the terminal or the power supply power of the charger.

10. The charging circuit of claim 9, wherein the power supply module comprises a power supply converter and a battery, the power supply converter being connected in series between the first port and the battery and in series between the second port and the battery, the terminal and the charger being further configured to supply power to the battery.

11. The charging circuit of claim 10, wherein the power converter is connected in series between the first port and the third port and in series between the second port and the third port; the power supply converter further has a step-down function, and the charging circuit further includes: and the boosting module is connected between the power supply converter and the third port in series.

12. The charging circuit of claim 1, wherein the charger is further configured to supply power to the terminal, and wherein the protocol chip is further configured to control the charger to simultaneously supply power to the load device and the terminal.