Charging circuit

Abstract

The embodiment of the present application provides a charging circuit, which comprises a first port for connecting a terminal, a second port for connecting a charger and a third port for connecting a load device, the terminal and the charger being used for supplying power to the load device; a protocol chip, which is used for acquiring whether the second port is connected with the charger, and is used for 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 present application is beneficial to improving the use experience of the terminal.

Description

TECHNICAL FIELD

[0001] The embodiment of the present application relates to the field of electronic equipment, in particular to a charging circuit. BACKGROUND

[0002] With the popularity of AR and other load devices and the diversification of functions of the load devices, people begin to apply AR and other load devices as a kind of accessory of daily terminal in the industrial and game fields. In this way, the performance of AR and other load devices and daily terminals can be integrated, so that the user has a better use experience.

[0003] In the actual application scene, the terminal usually not only communicates with AR and other load devices, but also needs to power the load devices, and at the same time of running itself, supplies power to other devices, which may cause performance problems such as reduced processing efficiency and heating of the terminal. SUMMARY

[0004] The embodiment of the present application provides a charging circuit, which is beneficial to solve the performance problem caused by the terminal needing to power the load device while running itself.

[0005] To solve the above problem, the embodiment of the present application provides a charging circuit, which comprises: a first port for connecting a terminal, a second port for connecting a charger and a third port for connecting a load device, the terminal and the charger being used to power the load device; a protocol chip, the protocol chip being used to acquire whether the second port is connected with the charger, and being used to control the terminal to stop power supply and control the charger to start power supply when the second port is connected with the charger.

[0006] In addition, the charging circuit further comprises: a switch, the switch being connected in series between the first port and the third port, the terminal supplying power to the load device during the conduction of the switch; the switch being connected with the protocol chip, the protocol chip being used to acquire whether the third port is connected with the load device, and being used to control the switch to conduct during the third port being connected with the load device.

[0007] In addition, the switch comprises a PMOS tube, the gate of the PMOS tube being connected with the protocol chip.

[0008] In addition, the protocol chip is used to transparently transmit the first port and the third port, and the terminal is used to identify whether the third port is connected with the load device and transmit the identification result to the protocol chip.

[0009] In addition, the charging circuit further comprises a first load switch connected in series between the second port and the third port, and the protocol chip is further configured to control the first load switch to be turned on when the charger is connected to the second port and to be turned off when the charger stops supplying power.

[0010] In addition, the first load switch has a first current threshold, and the first load switch is configured to be turned off when the input current is greater than the first current threshold and to be turned on when the input current is less than or equal to the first current threshold after the charger is connected to the second port.

[0011] In addition, the charging circuit further comprises a voltage reduction module connected in series between the second port and the first load switch.

[0012] In addition, the charging circuit further comprises a second load switch connected between the first port and the third port and connected between the second port and the third port, and the protocol chip is further configured to control the second load switch to be turned on when the load device is connected to the third port and to be turned off when the load device is disconnected from the third port.

[0013] In addition, the charging circuit further comprises a power supply module connected to the third port, and the protocol chip is further configured to control the power supply module to supply power to the load device during the power consumption of the load device is greater than the power supply power of the terminal or the power supply power of the charger.

[0014] In addition, the power supply module comprises a power supply converter and a battery, the power supply converter is connected in series between the first port and the battery and connected in series between the second port and the battery, and the terminal and the charger are further configured to supply power to the battery.

[0015] In addition, the power supply converter is connected in series between the first port and the third port and connected in series between the second port and the third port, and the power supply converter further has a voltage reduction function, and the charging circuit further comprises a voltage increase module connected in series between the power supply converter and the third port.

[0016] In addition, the charger is further configured to supply power to the terminal, and the protocol chip is further configured to control the charger to supply power to the load device and the terminal at the same time.

[0017] Compared with the prior art, the technical scheme provided by the embodiment of the application has the following advantages:

[0018] The technical scheme provides a charging circuit, which can connect a charger and a terminal at the same time, and can control the terminal to stop power supply and control the charger to start power supply after the charging circuit is connected with the charger, so that the terminal does not need to supply power to the outside while running by itself, which is beneficial to improve the use experience of the terminal.

[0019] In addition, the PMOS tube is used as the switch, and the PMOS tube can still have current passing through in the cutoff state, so that the output of the terminal can be adjusted by controlling the conduction or cutoff of the PMOS tube, thereby achieving the effect of saving power of the terminal.

[0020] In addition, the protocol chip transmits the first port and the third port, so that whether the connected load device is qualified is determined by the terminal, and the terminal can identify different types of load devices according to different types and settings, thereby realizing effective correspondence between the terminal and the load device; in addition, the information processing capability of the terminal is usually higher than that of the protocol chip, so as to improve the connection efficiency of the load device and the terminal. BRIEF DESCRIPTION OF DRAWINGS

[0021] One or more embodiments are exemplified by the pictures in the drawings corresponding thereto, which do not constitute a limitation on the embodiments, and elements with the same reference numerals in the drawings represent similar elements, unless otherwise specified, and the drawings do not constitute a proportional limit.

[0022] Figure 1 The circuit schematic diagram of the charging circuit provided by an embodiment of the present application is shown in the figure;

[0023] Figure 2 And Figure 3 The circuit schematic diagram of the charging circuit provided by another embodiment of the present application is shown in the figure;

[0024] Figure 4 The circuit schematic diagram of the charging circuit provided by another embodiment of the present application is shown in the figure;

[0025] Figure 5 The circuit schematic diagram of another charging circuit provided by another embodiment of the present application is shown in the figure. DETAILED DESCRIPTION

[0026] As known from the background, the terminal supplies power to other devices while running by itself, which may cause performance problems such as processing efficiency decline or heating, thereby causing the use experience of the terminal to decline.

[0027] To solve the above problem, the embodiment of the present application provides a charging circuit, which can be connected with a charger and a terminal simultaneously, and can control the terminal to stop power supply and control the charger to start power supply after the charging circuit is connected with the charger, so that the terminal can only maintain its own operation without power supply task, the influence of the power supply task on the processing performance and heat control of the terminal is reduced, and the use experience of the terminal is improved.

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the embodiments of the present application will be described in detail below with reference to the drawings. However, those skilled in the art can understand that, in the embodiments of the present application, many technical details are proposed in order to make the reader better understand the present application. However, the technical solutions claimed by the present application can be realized even without these technical details and various changes and modifications based on the following embodiments.

[0029] Figure 1 The charging circuit provided by the embodiment of the present application is shown in the circuit diagram.

[0030] Reference Figure 1 The charging circuit comprises a first port 111 for connecting a terminal 110, a second port 121 for connecting a charger 120, and a third port 131 for connecting a load device 130, and the terminal 110 and the charger 120 are used to supply power to the load device 130; a protocol chip 14, which is used to acquire whether the second port 121 is connected with the charger 120, and is used to control the terminal 110 to stop power supply and control the charger 120 to start power supply when the second port 121 is connected with the charger 120.

[0031] In the embodiment, the output end of the first port 111 is connected with the input end of the third port 131, 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.

[0032] In the embodiment, the output end of the first port 111 and the output end of the second port 121 are connected with the protocol chip 14, and the terminal 110 and the charger 120 are also used to supply power to the protocol chip 14; in addition, the protocol chip 14 is also used to transmit 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 whether the accessed device is a suitable load device 130 through the data packet.

[0033] Thus, whether the accessed load device 130 is qualified is determined by the terminal 110, the terminal 110 can identify different types of load devices according to types and settings, thereby realizing effective correspondence between the terminal 110 and the load device 130; in addition, the terminal 110 can usually update data through networking, thereby quickly realizing identification of the target load device 130, which is beneficial to improve the connection efficiency of the terminal 110 and the load device 130; in addition, the information processing capability of the terminal 110 is usually higher than that of the protocol chip 14, thus, it is beneficial to improve the connection efficiency of the load device 130 and the terminal 110.

[0034] The terminal 110 includes direct-charge direct-use electronic devices and electronic devices with power storage functions, the direct-charge direct-use terminal 110 includes sound boxes, televisions, desktop computers and the like; the terminal 110 with power storage functions includes mobile phones, tablets and notebook computers and the like. In addition, the charger 120 can be a charging head or a terminal device with power supply function; the load device 130 can be a direct-charge direct-use electronic device or an electronic device with power storage function.

[0035] The working principle of the charging circuit will be described in detail below through one connection sequence.

[0036] One: the terminal 110 is connected to the first port 111.

[0037] After the terminal 110 is 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 a working state. After entering the working state, the protocol chip 14 transmits the first port 111 and the third port 131, so that the terminal 110 can receive the data packet containing device information sent by the load device 130; at the same time, the protocol chip 14 is also used to obtain whether the second port 121 is connected with the charger 120.

[0038] Two: the load device 130 is connected to the third port 131.

[0039] 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; the terminal 110 sends the verification result to the protocol chip 14 after verifying the data packet; when the verification result is "pass", the protocol chip 14 controls the terminal 110 to supply power to the protocol chip 14 and the load device 130 at the same time, and the terminal 110 and the load device 130 are in communication connection to exchange information.

[0040] Three: the charger 120 is connected to the second port 121.

[0041] After the protocol chip 14 obtains that the charger 120 is connected to the second port 121, a power switching command is sent to the terminal 110 to make the terminal 110 stop power supply and the charger 120 start power supply.

[0042] In the embodiment, the first port 111 is also connected to the second port 121, and the terminal 110 is an electronic device capable of storing electricity; after the terminal 110 stops power supply, the protocol chip 14 is further configured to control the charger 120 to supply power to the terminal 110 and the load device 130 at the same time, so as to improve the endurance of the terminal 110.

[0043] In the embodiment, the first port 111, the second port 121 and the third port 131 have a common connection point 15. The first port 111, the second port 121 and the third port 131 are all TYPE-C interfaces and comply with the power switching protocol; in other embodiments, the first port, the second port and the third port can also be interfaces of other types such as USB.

[0044] In the 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 power supply and control the charger 120 to start power supply after the charging circuit connects the charger 120, so that the terminal 110 does not need to supply power to the outside while running by itself, thereby ensuring that the performance of the terminal 110 is not affected by the power supply program and facilitating improvement of the use experience of the terminal 110.

[0045] Another embodiment of the present application also provides a charging circuit, which is different from the previous embodiment in that the charging circuit further comprises a switch, a first load switch and a second load switch in the embodiment. The following will be described in detail in combination with Figure 2 and Figure 3 Figure 2 and Figure 3 The circuit schematic diagram of the charging circuit provided by another embodiment of the present application. The same or corresponding parts of the above embodiment can refer to the corresponding description of the above embodiment, and the following will not be described here.

[0046] In the embodiment, the charging circuit comprises: a switch 212 connected in series between the first port 211 and the third port 231, and the terminal 210 supplies power to the load device 230 during conduction of the switch 212; the switch 212 is connected with a protocol chip 24, and the protocol chip 24 is configured to obtain whether the third port 231 is connected with the load device 230 and is further configured to control the switch 212 to conduct during the third port 231 is connected with the load device 230.

[0047] ​In this embodiment, the switch 212 is a PMOS tube, the gate of the PMOS tube is connected with the protocol chip 24, the PMOS tube has a conduction state and a cutoff state, and the PMOS tube is in the cutoff state by default. When the third port 231 is empty, the PMOS tube is in the cutoff state, at this time, the current output by the terminal 210 through the PMOS tube is small, and is only used to supply power to the protocol chip 24; when the third port 231 is connected with the load device 230, the protocol chip 24 sends a first instruction S1 to the PMOS tube to make the PMOS tube conduct, at this time, the current output by the terminal 210 through the PMOS tube is large, and the protocol chip 24 and the load device 230 are supplied with power at the same time. In this way, the conduction or cutoff of the switch 212 can be controlled to achieve the effect of saving power of the terminal 210.

[0048] In this embodiment, the charging circuit includes a first load switch 223, the first load switch 223 is connected in series between the second port 221 and the third port 231, the protocol chip 24 controls the first load switch 223 to be conductive when the charger 220 is connected with the second port 221, and controls the first load switch 223 to be cut off when the charger 220 is disconnected with the second port 221.

[0049] In this embodiment, the charger 220 is connected with the second port 221, which means that the charger 220 is in a power output state, and the input voltage of the second port 221 is high; the second port 221 is disconnected with the charger 220, which means that the charger 220 no longer supplies power, that is, the input voltage of the second port 221 is low. 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.

[0050] Specifically, the protocol chip 24 includes a detection module 241a connected with the first load switch input end 223a, used to detect the voltage of the first load switch input end 223a; and a control module 241b connected with the detection module 241a, used to obtain the voltage of the first load switch input end 223a and control the first load switch 223 to be conductive or cut off based on the voltage of the first load switch input end 223a.

[0051] When the voltage potential of the first load switch input end 223a is low, it can be considered that the charger 220 stops supplying power, at which time the protocol chip 24 sends the second instruction S2 to control the first load switch 223 to be turned off, thereby avoiding the electric energy of the terminal 210 from flowing to the second port 221, which is conducive to saving the electric energy of the terminal 210; correspondingly, when the voltage potential of the first load switch input end 223a is high, it can be considered that the charger 220 is connected to the second port 221, at which time 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.

[0052] In addition, the first load switch 223 has a first current threshold value, when the second port 221 is connected to the charger 220, if the input end current of the first load switch 223 is greater than the first current threshold value, the first load switch 223 is turned off; if the input end current of the first load switch 223 is less than or equal to the first current threshold value, the first load switch 223 is turned on.

[0053] The first current threshold value can be determined by the load device 230, that is, different load devices 230 can have different first current threshold values, and the first current threshold value can be manually or automatically adjusted according to the type of the load device 230.

[0054] In other embodiments, the first load switch also has a first voltage threshold value, when the input end voltage of the first load switch is greater than the first voltage threshold value, the first load switch is turned off; when the input end voltage of the first load switch is less than or equal to the first voltage threshold value, the first load switch is turned on.

[0055] In this embodiment, the charging circuit further comprises a voltage reduction module 222, which is connected in series between the second port 221 and the first load switch 223, and is used to reduce the output voltage of the charger 220 to a preset voltage. The preset voltage can be a fixed value or a variable value adjusted according to the parameters of the load device 230.

[0056] For example, in one case, the preset voltage is a fixed value of 7.5V, and when the output end voltage of the charger 220 is 10V or 20V, the output end voltage of the voltage reduction 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 end voltage of the charger 220 is 10V or 20V, the output voltage of the voltage reduction module 222 is 5V.

[0057] In this way, the output voltage of the charger 220 can be reduced to avoid the charging circuit being affected by overvoltage; at the same time, chargers 220 with different output voltages can be connected to the charging circuit and provide electric energy.

[0058] The buck module 222 has an enable end 222a connected with the output end of the second port 221, and the charger 220 supplies power to the buck module 222 through the enable end 222a to make the buck module 222 enter a working state. In addition, a resistor is connected in series between the enable end 222a and the second port 221 to play a current-limiting and voltage-dividing role, thereby avoiding overcurrent or overvoltage of the enable end 222a and ensuring the safety of the buck module 222.

[0059] In the embodiment, the charging circuit includes a second load switch 232 connected between the first port 211 and the third port 231 and connected between the second port 221 and the third port 231. The protocol chip 24 sends a third instruction S3 to control the second load switch 232 to be turned on when the third port 231 is connected with the load device 230, and sends the third instruction S3 to control the third port 231 to be turned off when the third port 231 is disconnected with the load device 230.

[0060] The disconnection of the load device 230 includes hardware disconnection, shutdown and other modes, that is, the load device 230 no longer works by relying on the charging circuit provided in the embodiment. In addition, since the terminal 210 communicates with the load device 230, after the load device 230 is disconnected with the third port 231, the terminal 210 can no longer receive the information sent by the load device 230, and the terminal device 210 cannot receive the corresponding identity query information sent to the disconnected load device 230. After the terminal 210 cannot identify the load device 230, the terminal 210 sends an identification result to the protocol chip 24, and the protocol chip 24 controls the second load switch 232 to be turned off according to the identification result.

[0061] In addition, the second load switch 232 has a second voltage threshold. When the third port 231 is connected with the load device 230, if the voltage is greater than 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.

[0062] In the embodiment, the setting of the switch 212 is beneficial to save the power of the terminal 210, and the settings of the first load switch 223 and the second load switch 232 are beneficial to ensure the safety of the charging circuit.

[0063] Another embodiment of the present application also provides a charging circuit, which is different from the previous embodiment. In the embodiment, a power supply module and a delay chip are further included. The power supply module and the delay chip will be described in detail below. Figure 4 and Figure 5 Figure 4 a circuit schematic diagram of the charging circuit provided in another embodiment of the present application, Figure 5 ​A circuit schematic diagram of another charging circuit provided by another embodiment of the present application is shown in FIG. 6. The same or corresponding parts of this embodiment are the same as or corresponding to those of the previous embodiment, and thus the corresponding descriptions of the previous embodiment are referred to and will not be repeated here.

[0064] Reference Figure 4 The charging circuit further comprises a power supply module 35 connected with 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 the power consumption of the load device 330 is greater than the power supply power of the terminal 310 or the power supply power of the charger 320.

[0065] Specifically, the power supply module 35 comprises 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 connected in series between the second port 321 and the battery 352, and the terminal 310 and the charger 320 are further configured to supply power to the battery 352.

[0066] In the charging circuit of the present embodiment, the power supply converter 351 has a current limiting function, the power supply converter 351 is connected in series between the first port 311 and the third port 331, and connected in series between the second port 321 and the third port 331. In this way, it is beneficial to avoid overcurrent at the input end of the third port 331, thereby ensuring the safety of the load device 330; with reference to Figure 5 In another charging circuit of the present embodiment, the power supply converter 351a does not have a current limiting function, the output ends of the switch and the first load switch are connected with the input end of the power supply converter 351a and the input end of the second load switch.

[0067] In the present embodiment, the charging circuit further comprises a voltage boosting module 36 connected in series between the power supply converter 351 and the third port 331. Since the existing power supply converter 351 often has a voltage reducing effect, i.e. the output voltage is less than the input voltage, by adding the voltage boosting module 36, the current limiting of the input end of the third port 331 is achieved while ensuring that the voltage of the input end of the third port 331 meets the power supply voltage requirement of the load device 330.

[0068] In the present embodiment, by setting the power supply module 35, the load device 330 can operate normally in the case of insufficient power supply power of the terminal 310 or the charger 320.

[0069] Those skilled in the art can understand that the above embodiments are specific embodiments for implementing the present application, and in actual application, various changes can be made in form and details without departing from the spirit and scope of the present application. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present application, and thus the protection scope of the present application should be subject to the scope defined by the claims.

Claims

1. A charging circuit, characterized in that: include: a first port for connecting to a terminal, a second port for connecting to a charger, and a third port for connecting to a load device, wherein the terminal and the charger are used to supply power to the load device; a protocol chip, the protocol chip being used to determine whether the second port is connected to the charger, and to control the terminal to stop supplying power and to control the charger to start supplying power when the second port is connected to the charger; The protocol chip is further configured to control the power supply module to supply power to the load device when the power consumption of the load device is greater than the power supply power of the terminal or the power supply power of the charger; The power supply module includes a power converter and a battery. The power converter is 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 are also used to supply power to the battery. The power supply converter has a current limiting function, and 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 also has a voltage reduction function, and the charging circuit further includes: a boost module, and the boost module is connected in series between the power supply converter and the third port; The device further includes: a first load switch, the first load switch being connected in series between the second port and the third port, the protocol chip being further configured to control the first load switch to be turned on when the second port is connected to the charger, and to control the first load switch to be turned off when the second port is disconnected from the charger; The first load switch has a first current threshold. After the second port is connected to the charger, the first load switch is configured to be disconnected when the input current is greater than the first current threshold, and to be turned on when the input current is less than or equal to the first current threshold.

2. The charging circuit according to claim 1, wherein: Also includes: A switch is connected in series between the first port and the third port, and the terminal supplies power to the load device when the switch is turned on; the switch is connected to the protocol chip, and the protocol chip is used to obtain whether the third port is connected to the load device and to control the switch to be turned on when the third port is connected to the load device.

3. The charging circuit according to claim 2, wherein: The switch includes a PMOS tube, and a gate of the PMOS tube is connected to the protocol chip.

4. The charging circuit according to claim 2, wherein: The protocol chip is used for transparently transmitting the first port and the third port, and the terminal is used for identifying whether the third port is connected to the load device and transmitting the identification result to the protocol chip.

5. The charging circuit according to claim 1, wherein: Also includes: A step-down module is connected in series between the first port and the first load switch.

6. The charging circuit according to claim 1, wherein: Also includes: a second load switch, the second load switch is connected between the first port and the third port, and between the second port and the third port, the protocol chip is further used to control the second load switch to be turned on when the third port is connected to the load device, and to control the second load switch to be turned off when the load device is disconnected from the third port.

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

Images