CN113555915A - Charging circuit - Google Patents

Referring to fig. 1, the charging circuit includes: a first port 111 for connecting the

110, a

121 for connecting the

120, and a

131 for connecting the

130, the

110 and the

120 being for supplying power to the

130; and the

14, wherein the

14 is used for acquiring whether the

121 is connected with the

120, and for controlling the

110 to stop supplying power and controlling the

120 to start supplying power when the

121 is connected with the

120.

In this embodiment, the output end of the first port 111 is connected to the input end of the

131, and the

110 supplies power to the

130 through the first port 111 and the

131; the output end of the

121 is connected with the input end of the

131, and the

120 supplies power to the

130 through the

121 and the

131.

In this embodiment, the output end of the first port 111 and the output end of the

121 are connected to the

14, and the

110 and the

120 are further configured to supply power to the

14; in addition, the

14 is further configured to pass through the first port 111 and the

131, so that the

110 can receive a data packet containing device information sent by the

130, and the

110 verifies, through the data packet, whether the accessed device is the

130 compliant with the adaptation.

Thus, whether the accessed

130 is qualified or not is determined by the

110, and the

110 can identify different types of load devices according to different types and settings, so that the

110 and the

130 are effectively corresponding; in addition, the

110 may generally perform data update in a networking manner, so as to quickly identify the

130, which is beneficial to improving the connection efficiency between the

110 and the

130; in addition, the information processing capability of the

110 is generally higher than that of the

14, which is beneficial to improving the connection efficiency between the

130 and the

110.

The

110 comprises electronic equipment for direct charging and direct discharging and electronic equipment with a power storage function, and the

110 for direct charging and direct discharging comprises a sound box, a television, a desktop computer and the like; the

110 with the power storage function includes a mobile phone, a tablet, a notebook computer, and the like. Further, the

120 may be a charging head or a terminal device having a power supply function; the

130 may be an electronic device for direct charging or an electronic device having an electric power storage function.

Firstly, the method comprises the following steps: the

110 is connected to a first port 111.

After being connected to the first port 111, the

110 supplies power to the

14 through the first port 111, so that the

14 can enter an operating state. After entering the working state, the

14 transparently transmits the first port 111 and the

131, so that the

110 can receive a data packet containing device information sent by the

130; meanwhile, the

14 is also used to acquire whether the

121 is connected with the

120.

II, secondly: the

130 is connected to the

131.

After the

130 is connected to the

131, the

110 sends identity query information to the

130, and the

130 sends a data packet containing device information to the

110; after verifying the data packet, the

110 sends the verification result to the

14; when the verification result is "pass", the

14 controls the

110 to simultaneously supply power to the

14 and the

130, and meanwhile, the

110 is in communication connection with the

130 to perform information interaction.

Thirdly, the method comprises the following steps: the

120 is connected to the

121.

After the

14 acquires that the

120 is connected to the

121, a power switching command is sent to the

110, so that the

110 stops supplying power and the

120 starts supplying power.

In this embodiment, the first port 111 is further connected to the

121, and the

110 is an electronic device capable of storing electricity; after the

110 stops supplying power, the

14 is further used for controlling the

120 to simultaneously supply power to the

110 and the

130, so as to improve the endurance of the

110.

In this embodiment, the first port 111, the

121, and the

131 have a

15 therebetween. The first port 111, the

121 and the

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

120 and the

110 at the same time, and can control the

110 to stop supplying power and control the

120 to start supplying power after the charging circuit connects the

120, so, the

110 does not need to supply power outwards while running, thereby ensuring that the performance of the

110 is not affected by the power supply program, and being beneficial to improving the use experience of the

110.

In this embodiment, the charging circuit includes: a

212, the

212 being connected in series between the

211 and the

231, the

210 supplying power to the

230 during the on period of the

212; the

212 is connected to the

24, and the

24 is configured to obtain whether the

231 is connected to the

230, and further configured to control the

212 to be turned on during the connection of the

231 to the

230.

In this embodiment, the

212 is a PMOS transistor, a gate of the PMOS transistor is connected to the

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

231 is empty, the PMOS transistor is in a cut-off state, and the current output by the

210 and passing through the PMOS transistor is small and is only used for supplying power to the

24; when the

230 is connected to the

231, the

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

210 through the PMOS transistor is large, and power is supplied to the

24 and the

230. In this way, the

212 is controlled to be turned on or off, so that the power of the

210 can be saved.

In this embodiment, the charging circuit includes: and a

223, wherein the

223 is connected in series between the

221 and the

231, and the

24 controls the

223 to be turned on when the

221 is connected with the

220, and controls the

223 to be turned off when the

220 is disconnected from the

221.

The connection between the

220 and the

221 means that the

220 is in a power output state, and the voltage at the input terminal of the

221 is high level; the disconnection of the

221 from the

220 means that the

220 no longer supplies power, i.e., the voltage at the input terminal of the

221 is low, and it should be noted that when the

220 itself fails or a short circuit occurs between the

220 and the

221, the

220 may no longer supply power.

Specifically, the

24 includes a

241a, and the

241a is connected to the first

223a and is configured to detect a voltage at the first

223 a; further comprising: and the

241b is connected with the

241a, and is configured to obtain the voltage of the first load

223a, and control the

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

223a is at a low level, the

220 may stop supplying power, and at this time, the

24 sends the second instruction S2 to control the

223 to turn off, so as to prevent the electric energy of the terminal 210 from flowing to the

221, which is beneficial to saving the electric energy of the terminal 210; correspondingly, when the voltage potential at the first load

223a is at a high level, the

220 is considered to be connected to the

221, and the

24 sends the second instruction S2 to control the

223 to be turned on, so that the

220 can supply power to the

230 and the terminal 210.

In addition, the

223 has a first current threshold, when the

221 is connected to the

220, if the current at the input end of the

223 is greater than the first current threshold, the

223 is turned off; if the current at the input of the

223 is less than or equal to the first current threshold, the

223 is turned on.

The first current threshold may be determined by the

230, i.e., the first current threshold may be different for

230, and the first current threshold may be manually or automatically adjusted according to the type of the

230.

In this embodiment, the charging circuit further includes: the

222 is connected in series between the

221 and the

223, and the

222 is configured to drop the output voltage of the

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

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

220 is 10V or 20V, the voltage at the output terminal of the voltage-decreasing

222 is always 7.5V; in another case, the preset voltage is equal to the rated voltage of the

230, and when the rated voltage of the

230 is 5V and the output voltage of the

220 is 10V or 20V, the output voltage of the voltage-reducing

222 is 5V.

Thus, the output voltage of the

220 can be reduced, and the charging circuit is prevented from being influenced by overvoltage; meanwhile, the

220 having different output voltages are enabled to be connected to the charging circuit and supply power.

The

222 has an enable

222a, the enable

222a is connected to the output end of the

221, and the

220 supplies power to the

222 through the enable

222a, so that the

222 enters a working state; in addition, a resistor is connected in series between the enable

222a and the

221, so as to perform the functions of current limiting and voltage dividing, thereby preventing the enable

222a from overcurrent or overvoltage, and further ensuring the safety of the

222.

In this embodiment, the charging circuit includes: a

232, the

232 being connected between the

211 and the

231 and between the

221 and the

231, the

24 sending a third instruction S3 to control the

232 to be turned on when the

231 is connected to the

230, and sending a third instruction S3 to control the

231 to be turned off when the

231 is disconnected from the

230.

The disconnection of the

230 includes hardware disconnection, shutdown, and the like, that is, the

230 does not depend on the charging circuit provided in this embodiment to work; in addition, since the terminal 210 may interact with the

230 in a communication manner, after the

230 is disconnected from the

231, the terminal 210 can no longer receive the message sent by the

230, the terminal 210 cannot send the identity query information to the disconnected

230, and after the terminal 210 cannot identify the

230, the identification result is sent to the

24, and the

24 controls the

232 to be disconnected according to the identification result.

In addition, the

232 has a second voltage threshold, and when the

231 is connected to the

230, if the voltage exceeds the second voltage threshold, the

232 is turned off; if the voltage is less than or equal to the second voltage threshold, the

232 is turned on. In other embodiments, the second load switch also has a second current threshold.

In this embodiment, the

212 is provided to save the power of the terminal 210; the provision of the

223 and the

232 is advantageous for ensuring the safety of the charging circuit.

Referring to fig. 4, the charging circuit further includes: and a

35, wherein the

35 is connected to the

331, and the

34 is further configured to control the

35 to supply power to the

330 during a period when the power consumption of the

330 is greater than the power supply of the terminal 310 or the power supply of the

320.

Specifically, the

35 includes a

351 and a

352, the

351 is connected in series between the

311 and the

352 and between the

321 and the

352, and the terminal 310 and the

320 are also used for supplying power to the

352.

In the charging circuit of this embodiment, the

351 has a current limiting function, and the

351 is connected in series between the

311 and the

331, and is connected in series between the

321 and the

331. Therefore, the overcurrent of the current at the input end of the

331 is avoided, and the safety of the

330 is further ensured; referring to fig. 5, in another charging circuit of this embodiment, the

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

351a and to the input terminal of the second load switch.

In this embodiment, the charging circuit further includes: and the boosting

36, wherein the boosting

36 is connected in series between the

351 and the

331. Because the

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

331 is limited by adding the

36, and the voltage of the input terminal of the

331 is ensured to meet the requirement of the power supply voltage of the

330.

In this embodiment, the

35 is arranged to enable the

330 to operate normally when the power supplied by the terminal 310 or the

320 is insufficient.

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.