CN115528790A

CN115528790A - Power supply circuit and electronic device

Info

Publication number: CN115528790A
Application number: CN202211307968.XA
Authority: CN
Inventors: 姜恒康; 郭彤
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2022-10-24
Filing date: 2022-10-24
Publication date: 2022-12-27

Abstract

The application discloses a power supply circuit and electronic equipment, wherein the power supply circuit comprises a first switch, a first signal generation module, a battery, a charging interface and a first power supply port for connecting a first electric device; the charging interface is provided with a power supply pin and a grounding pin, and the power supply pin is connected with the first power supply port; the grounding pin is connected with the negative electrode of the battery; a first end of the first switch is electrically connected with the power pin, a second end of the first switch is electrically connected with the first power supply port, and a control end of the first switch is connected with the first signal generation module to access a first control signal; the first signal generation module is used for controlling the first switch to be conducted under the condition that a power supply pin of the charging interface is connected with power supply voltage, so that the first power supply port outputs the power supply voltage.

Description

Power supply circuit and electronic device

Technical Field

The present disclosure relates to the field of circuit design technologies, and more particularly, to a power supply circuit and an electronic device.

Background

With the development of the electronic industry, the functions of electronic equipment are more and more, and electronic components used on the electronic equipment are more and more, so that the circuit area of the electronic equipment is more and more tense. Therefore, it is important to improve the utilization rate of electronic components and reduce the number of electronic components used in the circuit.

All be provided with the motor among the present majority electronic equipment, the power supply circuit who uses commonly among the electronic equipment is being connected with the condition of charger, and the mains voltage that the charger provided can be through the step-down module processing of stepping down, and rethread boost chip steps up the back of handling, for the power supply of motor drive circuit.

The structure of the power supply circuit needs to firstly reduce the voltage and then boost the voltage signal provided by the charger under the condition that the power supply circuit is connected with the charger, so that the circuit structure of the power supply circuit is redundant and complex, the power supply efficiency is low, the power consumption and temperature rise are high, and the circuit area and the cost of the power supply circuit are increased.

Disclosure of Invention

The embodiment of the application provides a power supply circuit to solve the problem that the architecture redundancy of the power supply circuit is complex in the prior art.

In a first aspect, an embodiment of the present application provides a power supply circuit, which includes a first switch, a first signal generation module, a battery, a charging interface, and a first power supply port for connecting a first power consuming device;

the charging interface is provided with a power supply pin and a grounding pin, and the power supply pin is connected with the first power supply port; the grounding pin is connected with the negative electrode of the battery;

a first end of the first switch is electrically connected with the power pin, a second end of the first switch is electrically connected with the first power supply port, and a control end of the first switch is connected with the first signal generation module to access a first control signal;

the first signal generation module is used for controlling the first switch to be conducted under the condition that a power supply pin of the charging interface is connected with power supply voltage, so that the first power supply port outputs the power supply voltage.

In a second aspect, an embodiment of the present application further provides a power supply circuit, including a first power supply circuit and a second power supply circuit, where the first power supply circuit includes the power supply circuit according to the first aspect of the present application, and the second power supply circuit further includes a first on-off device, a second signal generation module, and a third power supply port; a first end of the first on-off device is electrically connected with the power pin, a second end of the first on-off device is electrically connected with the third power supply port, and a control end of the first on-off device is connected with the second signal generation module to access a third control signal;

the second signal generation module is used for controlling the first on-off device to be conducted under the condition that a voltage pin of the charging interface is connected with power supply voltage, so that the third power supply port outputs the power supply voltage.

In a third aspect, an embodiment of the present application further provides an electronic device, including the power supply circuit according to the first aspect or the second aspect of the present application.

In the embodiment of the application, under the condition that the charging interface is connected with the charger, the power supply voltage accessed by the charging interface is directly output to the first power supply port to supply power for the load, so that the circuit architecture of the power supply circuit can be simplified, the power supply efficiency of the power supply circuit is improved, the power consumption and the temperature rise are reduced, and the circuit area and the cost of the power supply circuit are reduced.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and together with the description, serve to explain the principles of the application.

Fig. 1 is a schematic structural diagram of a first power supply circuit according to an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of a second power supply circuit according to an embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of a third power supply circuit according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of a fourth power supply circuit provided in the embodiment of the present application;

fig. 5 is a schematic structural diagram of a fifth power supply circuit according to an embodiment of the present application.

Description of reference numerals:

1000, 4000-supply circuit; 4100-first power supply circuit; 4200-a second power supply circuit; 1110 — a first switch; 1120-a second switch; 1130-third switch; 1140-a fourth switch; 1200-a first signal generation module; 1300-a battery; 1400-a charging interface; 1500-a first power supply port; 1600-a first voltage adjustment module; 1610, 4215-inductance; 1700-a second power supply port; 1810 — a first capacitance; 1820-a second capacitance; 1830-third capacitance; 1900-motor drive circuit; 2000-motor; 2100-a master control module; VBUS-power pin; GND-ground pin; d +, D-: a differential pin; 4211-a first on-off; 4212-a second on-off; 4213-third cut-off; 4214-fourth on-off device; 4220-a second signal generating module; 4230-a third power supply port; 4240-a second voltage adjustment module; 4250-a fourth power supply port; 4261-fourth capacitor; 4262-fifth capacitor; 4263-sixth capacitance.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.

The features of the terms first and second in the description and in the claims of the present application may explicitly or implicitly include one or more of those features.

< first embodiment of Power supply Circuit >

The embodiment provides a power supply circuit.

Fig. 1 is a schematic structural diagram of a power supply circuit according to an embodiment of the present application.

As shown in fig. 1, the power supply circuit 1000 may include a first switch 1110, a first signal generating module 1200, a battery 1300, a charging interface 1400, and a first power supply port 1500 for connecting a first electric device.

The charging interface 1400 has a power supply pin VBUS and a ground pin GND. The power supply pin VBUS is connected to the first power supply port 1500, and the ground pin GND is connected to the negative electrode of the battery 1300.

A first end of the first switch 1110 is electrically connected to the power pin VBUS, a second end of the first switch 1110 is electrically connected to the first power supply port 1500, and a control end of the first switch 1110 is connected to the first signal generating module 1200 to access the first control signal.

The first signal generating module 1200 is configured to control the first switch 1110 to be turned on when the power pin VBUS of the charging interface 1400 is connected to a power voltage, so that the first power supply port 1500 outputs the power voltage.

The first control signal of this embodiment can be used to control the on/off state of the first switch 1110. For example, the first switch 1110 may be turned on when the first control signal is at a high level, and the first switch 1110 may be turned off when the first control signal is at a low level. For another example, the first switch 1110 may be turned on when the first control signal is at a low level, and the first switch 1110 may be turned off when the first control signal is at a high level.

Specifically, the first signal generating module 1200 may output a first control signal for controlling the first switch 1110 to be turned on when the charging interface 1400 is connected to the power grid through the charger; when the charging interface 1400 is not connected to a charger, or the charging interface 1400 is not connected to a power grid through a charger, a first control signal for controlling the first switch 1110 to be turned off is output.

In this embodiment, as shown in fig. 3, the first switch 1110 may be, for example, an NMOS transistor Q1 having a unidirectional body diode, a drain of the NMOS transistor Q1 may be connected to the power supply pin VBUS, a source of the NMOS transistor Q1 may be connected to the first power supply port 1500, and a gate of the NMOS transistor Q1 may be connected to the first signal generating module 1200 to receive the first control signal.

And under the condition that the charger is connected to the power grid, the charger converts the power grid voltage into the power supply voltage. In the case that the charger is connected to the charging interface 1400 at the same time, the power supply voltage may be provided to the power supply pin VBUS of the charging interface 1400, so that the power supply pin VBUS of the charging interface 1400 is connected to the power supply voltage.

Through the embodiment of the disclosure, under the condition that the charging interface is connected with the charger, the power supply voltage accessed by the charging interface is directly output to the first power supply port, the circuit architecture of the power supply circuit can be simplified, the power supply efficiency of the power supply circuit is improved, the power consumption and the temperature rise are reduced, and the circuit area and the cost of the power supply circuit are reduced.

In one embodiment, as shown in fig. 2 and 3, the power supply circuit 1000 further includes a first voltage adjustment module 1600, a second switch 1120, and a second power supply port 1700.

A first terminal of the first voltage adjustment module 1600 is electrically connected to a first terminal of the second switch 1120, and a first terminal of the first voltage adjustment module 1600 is further electrically connected to the second power supply port 1700. A second end of the first voltage adjustment module 1600 is electrically connected to the first power port 1500.

A control terminal of the second switch 1120 is connected to the first signal generating module 1200 to receive the second control signal, and a second terminal of the second switch 1120 is connected to a positive electrode of the battery 1300.

Under the condition that the power supply pin VBUS of the charging interface 1400 is not connected to the power supply voltage, the first signal generating module 1200 is configured to control the second switch 1120 to be turned on, so that the second power supply port 1700 loads the battery voltage.

The first voltage adjustment module 1600 is configured to boost the battery voltage, so that the first power supply port 1500 outputs the boosted battery voltage.

The second control signal of this embodiment may be used to control the switching state of the second switch 1120. For example, the second switch 1120 may be turned on when the second control signal is at a high level, and the second switch 1120 may be turned off when the second control signal is at a low level. For another example, the second switch 1120 may be turned on when the second control signal is at a low level, and the second switch 1120 may be turned off when the second control signal is at a high level.

Specifically, the first signal generating module 1200 may output the second control signal for controlling the second switch 1120 to be turned on when the charging interface 1400 is not connected to the charger, or the charging interface 1400 is not connected to the power grid through the charger, or the charging interface 1400 is connected to the power grid through the charger, but the battery 1300 is not fully charged; when the charging interface 1400 is connected to the grid through the charger and the battery is fully charged, a second control signal for controlling the second switch 1120 to be turned off is output.

In this embodiment, as shown in fig. 3, the second switch 1120 may be, for example, an NMOS transistor Q2 having a bidirectional body diode, and a drain of the NMOS transistor Q2 may be connected to the first voltage adjustment module 1600 and also connected to the second power supply port 1700; the source of the NMOS transistor Q2 may be connected to the positive electrode of the battery 1300, and the gate of the NMOS transistor Q2 may be connected to the first signal generating module 1200 to receive the second control signal.

When the charging interface 1400 is not connected to a charger, that is, the power pin VBUS of the charging interface 1400 is not connected to a power voltage, the battery voltage provided by the battery 1300 may be transmitted to the first voltage adjustment module 1600 through the second switch 1120, and after the battery voltage is boosted by the first voltage adjustment module 1600, the boosted battery voltage is provided to the first power supply port 1500, so that the first power supply port 1500 outputs the boosted battery voltage.

In addition, the battery voltage provided by the battery 1300 may also be transmitted to the second power supply port 1700 through the second switch 1120, so that the second power supply port outputs the battery voltage.

Through this embodiment, under the condition of not connecting the charger, provide to first power supply port after carrying out boost process to battery voltage through first voltage adjustment module for the battery is the power supply of first power supply port, and simultaneously, battery voltage can also be directly provided to second power supply port through the second switch, makes the battery still for the power supply of second power supply port. Therefore, the power supply efficiency of the power supply circuit can be improved, the circuit structure of the power supply circuit is simplified, and the hardware cost is reduced.

In one embodiment, as shown in fig. 2 and 3, the first voltage adjustment module 1600 may include a third switch 1130, a fourth switch 1140, and an inductor 1610.

A first terminal of the third switch 1130 is connected to the first power supply port 1500, a second terminal of the third switch 1130 is connected to a first terminal of the fourth switch 1140, and a control terminal of the third switch 1130 receives a third control signal.

A second terminal of the fourth switch 1140 is connected to the ground pin GND, and a control terminal of the fourth switch 1140 is connected to a fourth control signal.

A first terminal of the inductor 1610 is connected to a second terminal of the third switch 1130, a second terminal of the inductor 1610 is connected to the second power supply port 1700, and a second terminal of the inductor 1610 is further connected to a first terminal of the second switch 1120.

The third control signal of this embodiment may be used to control the switching state of the third switch 1130. For example, the third switch 1130 may be turned on when the third control signal is at a high level, and the third switch 1130 may be turned off when the third control signal is at a low level. For another example, the third switch 1130 may be turned on when the third control signal is at a low level, and the third switch 1130 may be turned off when the third control signal is at a high level.

The fourth control signal of this embodiment may be used to control the on/off state of the fourth switch 1140. For example, the fourth switch 1140 may be turned on when the fourth control signal is at a high level, and the fourth switch 1140 may be turned off when the fourth control signal is at a low level. For another example, the fourth switch 1140 may be turned on when the fourth control signal is at a low level, and the fourth switch 1140 may be turned off when the fourth control signal is at a high level.

Further, the third control signal and the fourth control signal may control at most one of the third switch 1130 and the fourth switch 1140 to be in an on state.

In one example, the third control signal and the fourth control signal may both be PWM signals, and the third control signal and the fourth control signal have the same duty ratio, the same signal period, the same frequency, and opposite level states. Specifically, the fourth control signal is at a low level when the third control signal is at a high level, and the fourth control signal is at a high level when the third control signal is at a low level.

In this embodiment, the battery voltage is V1, the duty ratio of the third control signal and the fourth control signal is D1, when the third switch 1130 is controlled to be turned off by the third control signal and the fourth switch 1140 is controlled to be turned on by the fourth control signal, the battery voltage V1 is applied to the inductor 1610, at this time, the inductor 1610 is excited by the battery voltage V1, and the magnetic flux increased by the inductor 1610 is V1 × Ton1; when the third control signal controls the third switch 1130 to be turned on and the fourth control signal controls the fourth switch 1140 to be turned off, the inductor 1610 is demagnetized due to the continuous output current, and the magnetic flux reduced by the inductor 1610 is (Vo-V1) × Toff1. Where Vo is a voltage of the first power supply port 1500, ton1 is an on-time of the fourth switch 1140 in one signal period of the fourth control signal, and Toff1 is an off-time of the fourth switch 1140 in one signal period of the fourth control signal.

When the switching states of the third switch 1130 and the fourth switch 1140 reach equilibrium, V1 + Ton1= (Vo-V1) × Toff1, and the duty ratio D1 < 1, therefore, V1 < Vo, and the boost function is realized.

In this embodiment, by controlling the switching states of the third switch and the fourth switch, the third switch, the fourth switch and the inductor can form the first voltage adjustment module 1600 to boost the battery voltage.

In one example, since the supply voltage required by the first electrical device is usually a fixed value and is the same as the voltage of the power supply terminal of the charging interface, the duty ratio of the third control signal and the fourth control signal may be adjusted so that the boosted battery voltage obtained by boosting the battery voltage is equal to the supply voltage required by the first electrical device.

In this embodiment, as shown in fig. 3, the third switch 1130 may be, for example, an NMOS transistor Q3 with a unidirectional body diode, the fourth switch 1140 may be, for example, an NMOS transistor Q4 with a unidirectional body diode, a drain of the NMOS transistor Q3 may be connected to the first power supply port 1500, a source of the NMOS transistor Q3 may be connected to the drain of the NMOS transistor Q4 and also connected to the first end of the inductor 1610, and a source of the NMOS transistor Q4 may be connected to the ground pin GND. The gate of the NMOS transistor Q3 may be connected to the first signal generating module 1200 to switch in the third control signal, and the gate of the NMOS transistor Q4 may be connected to the first signal generating module 1200 to switch in the fourth control signal.

In one example, the third control signal and the fourth control signal may be provided by two pins of the first signal generating module 1200.

In another example, the third control signal and the fourth control signal may be provided by one pin and one inverter of the first signal generating module 1200. Specifically, the first signal generating module 1200 may have a pin for outputting the third control signal, where the pin is connected to an input terminal of an inverter, and an output terminal of the inverter is connected to a control terminal of the fourth switch 1140, so as to provide the fourth control signal to the fourth switch 1140.

In this embodiment, the inverter inverts the third control signal to obtain the fourth control signal, so that the third switch 1130 and the fourth switch 1140 are prevented from being turned on simultaneously, and the third switch 1130 and the fourth switch 1140 are controlled more accurately.

In this embodiment, the first voltage adjustment module for boosting the battery voltage is configured by the third switch, the fourth switch and the inductor, so that the circuit architecture can be simplified, and the circuit area and the cost of the power supply circuit can be reduced.

In an embodiment, when the power pin VBUS of the charging interface 1400 is connected to a power voltage, the first signal generating module 1200 is configured to control the first switch 1110 and the second switch 1120 to be turned on, and the first voltage adjusting module 1600 is configured to perform voltage reduction processing on the power voltage input through the first switch 1110, so that the reduced power voltage charges the battery 1300.

When the charging interface 1400 is connected to the power grid through the charger but the battery 1300 is not fully charged, the first signal generation module 1200 outputs a first control signal for controlling the first switch 1110 to be turned on and a second control signal for controlling the second switch 1120 to be turned on, so that both the first switch 1110 and the second switch 1120 are turned on, and thus the power voltage can be provided to the first voltage adjustment module 1600 through the first switch 1110, and the stepped-down power voltage can be provided to the battery 1300.

In this embodiment, the power voltage is V2, the duty ratio of the third control signal and the fourth control signal is D2, when the third switch 1130 is controlled to be turned on by the third control signal and the fourth switch 1140 is controlled to be turned off by the fourth control signal, the voltage applied to both ends of the inductor 1610 is V2-Vo, at this time, the inductor is excited by the voltage V2-Vo, and the magnetic flux added by the inductor is: (V2-Vo) Ton2, when the third switch 1130 is turned off by the third control signal and the fourth switch 1140 is turned on by the fourth control signal, the inductor 1610 is demagnetized due to the continuous output current, and the magnetic flux decreased by the inductor 1610 is Vo Toff2. When the switching states of the third and

fourth switches

1130 and 1140 reach equilibrium, (V2-Vo) × Ton2= Vo × Toff2. Because the duty ratio D2 is less than 1, V2 is more than Vo, and the voltage reduction function is realized. Where Vo is a voltage of the first power supply port 1500, ton2 is an on time of the fourth switch 1140 in one signal period of the fourth control signal, and Toff2 is an off time of the fourth switch 1140 in one signal period of the fourth control signal.

In this embodiment, by controlling the switching states of the third switch and the fourth switch, the first voltage adjustment module 1600 formed by the third switch, the fourth switch and the inductor can perform voltage reduction processing on the power voltage.

In this embodiment, since the charging voltage of the battery 1300 is usually a fixed value and is smaller than the voltage of the power pin VBUS of the charging interface 1400, the duty ratio of the third control signal and the fourth control signal may be adjusted so that the obtained stepped-down power voltage is equal to the battery voltage after the power voltage is stepped down.

In the embodiment of the application, under the condition of connecting the charger, the first voltage adjusting module performs voltage reduction processing on the power supply voltage and then charges the battery, and the first voltage adjusting module is multiplexed to perform voltage reduction processing, so that the circuit architecture can be simplified, and the circuit area and the cost of the power supply circuit are reduced.

In one embodiment, the first switch 1110, the second switch 1120, the third switch 1130, and the fourth switch 1140 are all located within the charge cell chip.

In this embodiment, by multiplexing the first switch, the second switch, the third switch, and the fourth switch inside the charging chip, the circuit architecture of the power supply circuit can be simplified, and the circuit area and the cost of the power supply circuit can be reduced.

Further, the first signal generating module 1200 in this embodiment may be disposed inside the charging chip, that is, provided by the charging chip; or may be provided outside the charging chip, i.e. provided by a chip other than the charging chip.

In one embodiment, as shown in fig. 3, the power pin VBUS is connected to the ground pin GND through a first capacitor 1810.

In this embodiment, the first capacitor for filtering is disposed at the power pin, so that the power voltage accessed by the power pin is more stable.

In one embodiment, as shown in fig. 3, the first power supply port 1500 is connected to the ground pin GND through the second capacitor 1820.

In this embodiment, by providing the second capacitor for filtering at the first power supply port, the voltage output by the first power supply port can be more stable.

In one embodiment, as shown in fig. 3, the second power supply port 1700 is connected to the ground pin GND through a third capacitor 1830.

In this embodiment, the third capacitor for filtering is provided at the second power supply port, so that the voltage output by the second power supply port is more stable.

In one embodiment, as shown in fig. 3, the power supply circuit 1000 further includes a motor driving circuit 1900, and the first power supply port 1500 is connected to the motor driving circuit 1900. Motor driver circuit 1900 may be used to drive motor 2000 to vibrate.

In one embodiment, the first signal generating module 1200 is further configured to detect a voltage value of a battery voltage and set duty ratios of the third control signal and the fourth control signal according to the voltage value of the battery voltage.

In this embodiment, the voltage values of the battery voltages provided by the battery under different remaining capacities may be different. Therefore, in order to make the voltage of the first power supply port 1500 always equal to the power supply voltage of the first electric device, the first signal generating module 1200 may set the duty ratios of the third control signal and the fourth control signal according to the voltage value of the battery voltage.

Specifically, when the voltage value of the battery voltage decreases, the duty ratios of the third control signal and the fourth control signal are increased; the duty ratios of the third control signal and the fourth control signal are decreased when the voltage value of the battery voltage increases.

In the embodiment of the application, the duty ratios of the third control signal and the fourth control signal are set according to the voltage value of the battery voltage, so that the voltage of the first power supply port 1500 can be a fixed value, that is, the first power supply port 1500 can provide a fixed power supply voltage for the first electrical device.

In one embodiment, the first signal generating module 1200 is further configured to detect whether the charging interface 1400 is connected to the grid through a charger. The first signal generating module 1200 controls the first voltage adjusting module 1600 to perform voltage reduction processing on the power voltage accessed through the first switch 1110 when the charging interface 1400 is connected to the power grid through the charger. The first signal generating module 1200 controls the first voltage adjusting module 1600 to perform the boosting process on the battery voltage accessed through the second switch 1120 when the charging interface 1400 is not connected to the grid through the charger.

In one embodiment, as shown in fig. 3, the power supply circuit 1000 may further include a master control device 2100, where the master control device 2100 is configured to detect a power consumption state of the first power consumption device and control the operation of the generating module 1200 according to the power consumption state.

In this embodiment, the master control device 2100 may control the first electric device to start, and therefore, may detect a power consumption status of the first electric device, where the power consumption status indicates whether the first electric device is to start or not and whether a power supply circuit is needed to supply power to the first electric device.

In an embodiment in which the signal generating module 1200 is disposed in the charging chip, the main control device 2100 may be connected to the charging chip through an I2C bus (including SDA and SCL), and the main control device 2100 may control the first signal generating module 1200 to operate through the I2C bus when it is detected that the first electric device is to be started, so that the power supply circuit supplies power to the first electric device.

Further, in a case that the charger is not connected to the charging interface, the main control device 2100 controls the first signal generating module 1200 to operate when it detects that the power consumption state of the first power consumption device indicates that the first power consumption device is to be started and needs the power supply circuit to supply power to the first power consumption device. In the case where the power consumption state of the first power consumption device is detected to indicate that the first power consumption device will stop operating, and the power supply circuit is not required to supply power to the first power consumption device, the first signal generation module 1200 is controlled to stop operating. In the case where the first signal generation module 1200 stops operating, the first switch 1110, the second switch 1120, the third switch 1130, and the fourth switch 1140 may all be turned off.

Through the embodiment, the main control device controls the signal generation module to work according to the power utilization state of the first electric device, so that the power consumption of the power supply circuit can be effectively reduced.

In one embodiment, the master control device 2100 is further configured to control the charger to output a power supply voltage of a set voltage value through the charging interface 1400 in a case where the charging interface 1400 is connected to the grid through the charger.

As shown in fig. 3, the master control device 2100 may be connected to the differential pins (D +, D-) of the charging interface 1400 through differential signal lines, and when the charging interface 1400 is connected to the power grid through the charger, the charger may be controlled to output a power voltage with a set voltage value through the differential signal lines.

In this embodiment, the charging interface may be connected to chargers of various specifications, and when the charger connected to the charging interface supports various output voltages, the main control device 2100 may be a power supply device configured to control the charger to output a set voltage value, where the set voltage value is equal to a power supply voltage of the first power consumption device.

Through the embodiment, the charger is controlled to output the power supply voltage with the set voltage value, so that the power supply circuit can directly adopt the power supply voltage provided by the charger to supply power for the first electric device, and the power supply efficiency of the power supply circuit is improved.

In one embodiment, the first switch 1110, the second switch 1120, the third switch 1130, and the fourth switch 1140 may also be a triode.

< second embodiment of Power supply Circuit >

The embodiment provides a power supply circuit.

Fig. 4 is a schematic structural diagram of a power supply circuit according to an embodiment of the present application.

As shown in fig. 4, the power supply circuit 4000 includes a first power supply circuit 4100 and a second power supply circuit 4200, and the first power supply circuit 4100 includes the power supply circuit 1000 according to the foregoing embodiment. The second power supply circuit 4200 further includes a first switch 4211, a second signal generating module 4220, and a third power supply port 4230.

A first end of the first switch 4211 is connected to a power supply pin VBUS in the power supply circuit 1000, a second end of the first switch 4211 is connected to the third power supply port 4230, and a control end of the first switch 4211 is connected to the second signal generating module to access the fifth control signal.

The second signal generation module is configured to control the first on-off device to be turned on when the power pin VBUS of the charging interface 1400 is connected to the power voltage, so that the third power supply port outputs the power voltage.

The fifth control signal of the present embodiment may be used to control the switching state of the first switch 4211. For example, when the fifth control signal is at a high level, the first switch 4211 may be turned on, and when the fifth control signal is at a low level, the first switch 4211 may be turned off. For another example, when the fifth control signal is at a low level, the first switch 4211 may be turned on, and when the fifth control signal is at a high level, the first switch 4211 may be turned off.

Specifically, the second signal generation module 4220 may output a fifth control signal for controlling the conduction of the first switch 4211 when the charging interface 1400 is connected to the power grid through a charger; when the charging interface 1400 is not connected to a charger or the charging interface 1400 is not connected to the power grid through the charger, a fifth control signal for controlling the first switch 4211 to be turned off is output.

In this embodiment, as shown in fig. 5, the first switch 4211 may be, for example, an NMOS transistor Q5 having a unidirectional body diode, a drain of the NMOS transistor Q5 may be connected to the power supply pin VBUS, a source of the NMOS transistor Q5 may be connected to the third power supply port 4230, and a gate of the NMOS transistor Q5 may be connected to the second signal generating module 4220 to switch in the sixth control signal.

And under the condition that the charger is connected to the power grid, the charger converts the power grid voltage into a power supply voltage. In the case that the charger is connected to the charging interface 1400 at the same time, the power supply voltage may be provided to the power supply pin VBUS of the charging interface 1400, so that the power supply pin VBUS of the charging interface 1400 is connected to the power supply voltage.

Through the embodiment of the disclosure, under the condition that the charging interface is connected with the charger, the power supply voltage accessed by the charging interface can be directly output to the third power supply port, the circuit architecture of the power supply circuit can be simplified, the power supply efficiency of the power supply circuit is improved, the power consumption and the temperature rise are reduced, and the circuit area and the cost of the power supply circuit are reduced.

In one example, the first power supply circuit 4100 and the second power supply circuit 4200 may be provided on a first circuit board and a second circuit board, respectively. In the case where the first electric device is provided on the first circuit board, the first electric device is supplied with power using the first power supply circuit. In the case where the first electric device is provided on the second circuit board, the second power supply circuit is used to supply power to the first electric device. Therefore, the power supply wiring of the first electric device can be effectively reduced, and the power supply efficiency of the power supply circuit is improved.

In one embodiment, as shown in fig. 5, the power supply circuit further includes a second voltage adjustment module 4240, a second switch 4212 and a fourth power supply port 4250, a first end of the second voltage adjustment module 4240 is electrically connected with a first end of the second switch 4212, a first end of the second voltage adjustment module 4240 is further electrically connected with the fourth power supply port 4150, and a second end of the second voltage adjustment module 4240 is electrically connected with the third power supply port 4230; a control end of the second switch 4212 is connected to the second signal generating module 4220 to receive a sixth control signal, and a second end of the second switch 4212 is connected to the positive electrode of the battery 1300; when the power supply pin VBUS of the charging interface 1400 is not connected to a power supply voltage, the second signal generation module 4220 is configured to control the second switch 4212 to be turned on, so that the fourth power supply port 4250 loads a battery voltage.

The second voltage adjustment module 4220 is configured to boost the battery voltage, so that the third power supply port 4230 outputs the boosted battery voltage.

The sixth control signal of the present embodiment may be used to control the switching state of the second switch 4212. For example, when the sixth control signal is at a high level, the second switch 4212 may be turned on, and when the sixth control signal is at a low level, the second switch 4212 may be turned off. For another example, the second switch 4212 may be turned on when the sixth control signal is at a low level, and the second switch 4212 may be turned off when the sixth control signal is at a high level.

Specifically, the second signal generation module 4220 may output a sixth control signal for controlling the second switch 4212 to be turned on when the charging interface 1400 is not connected to the charger, or the charging interface 1400 is not connected to the power grid through the charger, or the charging interface 1400 is connected to the power grid through the charger, but the battery 1300 is not fully charged; when the charging interface 1400 is connected to the grid through the charger and the battery is fully charged, a sixth control signal for controlling the second switch 4212 to be turned off is output.

In this embodiment, as shown in fig. 5, the second switch 4212 may be, for example, an NMOS transistor Q6 having a bidirectional body diode, and a drain of the NMOS transistor Q6 may be connected to the second voltage adjustment module 4240 and also connected to the fourth power supply port 4250; the source of the NMOS transistor Q6 may be connected to the positive electrode of the battery 1300, and the gate of the NMOS transistor Q6 may be connected to the second signal generating module 4220 to receive the sixth control signal.

When the charging interface 1400 is not connected to a charger, that is, the power pin VBUS of the charging interface 1400 is not connected to the power voltage, the battery voltage provided by the battery 1300 may be transmitted to the second voltage adjustment module 4240 through the second switch 4212, and after the battery voltage is boosted by the second voltage adjustment module 4240, the boosted battery voltage is provided to the third power supply port 4230, so that the third power supply port 4230 outputs the boosted battery voltage.

In addition, the battery voltage provided by the battery 1300 may be transmitted to the fourth power supply port 4250 by the second switch 4212, so that the fourth power supply port outputs the battery voltage.

Through the embodiment, under the condition that the charger is not connected, the battery voltage is boosted by the second voltage adjustment module 4240 and then provided to the third power supply port, so that the battery supplies power to the third power supply port, and meanwhile, the battery voltage can also be directly provided to the fourth power supply port through the second on-off device, so that the battery also supplies power to the fourth power supply port. Therefore, the power supply efficiency of the power supply circuit can be improved, the circuit structure of the power supply circuit is simplified, and the hardware cost is reduced.

In one embodiment, as shown in fig. 5, the second voltage adjustment module 4240 may include a third interrupter 4213, a fourth interrupter 4214, and another inductor 4215.

A first end of the third interrupter 4213 is connected to the third power supply port 4230, a second end of the third interrupter 4213 is connected to a first end of the fourth interrupter 4214, and a control end of the third interrupter 4213 is connected to the seventh control signal.

A second end of the fourth interrupter 4214 is connected to the ground pin GND, and a control end of the fourth interrupter 4214 receives an eighth control signal.

A first terminal of the inductor 4215 is connected to a second terminal of the third switch 4213, a second terminal of the inductor 4215 is connected to the fourth power supply port 4250, and a second terminal of the inductor 4215 is further connected to a first terminal of the second switch 4212.

The seventh control signal of the present embodiment may be used to control the on/off state of the third interrupter 4213. For example, the third switch 4213 may be turned on when the seventh control signal is at a high level, and the third switch 4213 may be turned off when the seventh control signal is at a low level. For another example, the third switch 4213 may be turned on when the seventh control signal is at a low level, and the third switch 4213 may be turned off when the seventh control signal is at a high level.

The eighth control signal of the present embodiment may be used to control the on/off state of the fourth interrupter 4214. For example, when the eighth control signal is at a high level, the fourth interrupter 4214 may be turned on, and when the eighth control signal is at a low level, the fourth interrupter 4214 may be turned off. For another example, the fourth switch 4214 may be turned on when the eighth control signal is at a low level, and the fourth switch 4214 may be turned off when the eighth control signal is at a high level.

Further, the seventh control signal and the eighth control signal may control at most one of the third interrupter 4213 and the fourth interrupter 4214 to be in an on state.

In one example, the seventh control signal and the eighth control signal may both be PWM signals, and the seventh control signal and the eighth control signal have the same duty ratio, the same signal period, the same frequency, and opposite level states. Specifically, the eighth control signal is at a low level when the seventh control signal is at a high level, and the eighth control signal is at a high level when the seventh control signal is at a low level.

In this embodiment, the battery voltage is V1, the duty ratio of the seventh control signal and the eighth control signal is D1, when the seventh control signal controls the third switch 4213 to be turned off and the eighth control signal controls the fourth switch 4214 to be turned on, the battery voltage V1 is applied to the inductor 4215, at this time, the inductor 4215 is excited by the battery voltage V1, and the magnetic flux increased by the inductor 4215 is V1 + Ton1; when the seventh control signal controls the third switch 4213 to be turned on and the eighth control signal controls the fourth switch 4214 to be turned off, the inductor 4215 is demagnetized due to the continuation of the output current, and the magnetic flux reduced by the inductor 4215 is (Vo-V1) × Toff1. Where Vo is a voltage of the third power supply port 4230, ton1 is an on time of the fourth switch 4214 in one signal period of the eighth control signal, and Toff1 is an off time of the fourth switch 4214 in one signal period of the eighth control signal.

When the switching states of the third and

fourth interrupters

4213 and 4214 reach equilibrium, V1 + Ton1= (Vo-V1) × Toff1, the duty ratio D1 < 1, and therefore V1 < Vo, and a boosting function is realized.

In this embodiment, by controlling the states of the on/off devices of the third breaker and the fourth breaker, the third breaker, the fourth breaker and the inductor can form a second voltage adjustment module 4240, so as to boost the battery voltage.

In an example, since the power supply voltage required by the first electrical device is usually a fixed value and is the same as the voltage of the power supply terminal of the charging interface, the duty ratio of the seventh control signal and the eighth control signal may be adjusted so that the boosted battery voltage obtained by boosting the battery voltage is equal to the power supply voltage required by the first electrical device.

In this embodiment, as shown in fig. 5, the third switch 4213 may be, for example, an NMOS transistor Q7 having a unidirectional body diode, the fourth switch 4214 may be, for example, an NMOS transistor Q8 having a unidirectional body diode, a drain of the NMOS transistor Q7 may be connected to the third power supply port 4230, a source of the NMOS transistor Q7 may be connected to the drain of the NMOS transistor Q8 and also connected to the first end of the inductor 4215, and a source of the NMOS transistor Q8 may be connected to the ground pin GND. The gate of the NMOS transistor Q7 may be connected to the second signal generating module 4220 to switch in the seventh control signal, and the gate of the NMOS transistor Q8 may be connected to the second signal generating module 4220 to switch in the eighth control signal.

In one example, the seventh control signal and the eighth control signal may be provided by two pins of the second signal generation module 4220.

In another example, the seventh control signal and the eighth control signal may be provided by one pin and one inverter of the second signal generation module 4220. Specifically, the second signal generating module 4220 may have a pin for outputting the seventh control signal, and the pin is connected to an input terminal of an inverter, and an output terminal of the inverter is connected to a control terminal of the fourth interrupter 4214, so as to provide the eighth control signal to the fourth interrupter 4214.

In this embodiment, the eighth control signal is obtained by performing an inversion process on the seventh control signal through the inverter, so that a situation that the third interrupter 4213 and the fourth interrupter 4214 are turned on at the same time can be avoided, and the third interrupter 4213 and the fourth interrupter 4214 are controlled more accurately.

In this embodiment, the voltage adjustment module for boosting the battery voltage is formed by the third breaker, the fourth breaker and the inductor, so that the circuit architecture can be simplified, and the circuit area and the cost of the power supply circuit can be reduced.

In an embodiment, when the power pin VBUS of the charging interface 1400 is connected to a power voltage, the second signal generating module 4220 is configured to control the first switch 4211 and the second switch 4212 to be turned on, and the second voltage adjusting module 4240 is configured to perform voltage reduction processing on the power voltage input through the first switch 4211, so that the reduced power voltage charges the battery 1300.

In the case where the charging interface 1400 is connected to the grid through a charger but the battery 1300 is not fully charged, the second signal generation module 4220 outputs a fifth control signal for controlling the first switch 4211 to be turned on and a sixth control signal for controlling the second switch 4212 to be turned on, so that both the first switch 4211 and the second switch 4212 are turned on, so that the power supply voltage can be provided to the second voltage adjustment module 4240 through the first switch 4211, and the stepped-down power supply voltage can be provided to the battery 1300.

In this embodiment, the power voltage is V2, the duty ratio of the seventh control signal and the eighth control signal is D2, when the seventh control signal controls the third on-off device 4213 to be turned on and the eighth control signal controls the fourth off-device 4214 to be turned off, the voltage applied to both ends of the inductor 4215 is V2-Vo, at this time, the inductor is excited by the voltage V2-Vo, and the magnetic flux increased by the inductor is: (V2-Vo) Ton2, when the seventh control signal controls the third breaker 4213 to be turned off and the eighth control signal controls the fourth breaker 4214 to be turned on, the inductor 4215 is demagnetized due to the continuation of the output current, and the magnetic flux decreased by the inductor 4215 is Vo Toff2. When the switching states of the third and

fourth interrupters

4213 and 4214 reach equilibrium, (V2-Vo) × Ton2= Vo × Toff2. Because the duty ratio D2 is less than 1, V2 is more than Vo, and the voltage reduction function is realized. Where Vo is a voltage of the third power supply port 4230, ton2 is an on time of the fourth interrupter 4214 in one signal period of the eighth control signal, and Toff2 is an off time of the fourth interrupter 4214 in one signal period of the eighth control signal.

In this embodiment, by controlling the states of the on/off devices of the third breaker and the fourth breaker, the second voltage adjustment module 4240 formed by the third breaker, the fourth breaker and the inductor can perform voltage reduction processing on the power supply voltage.

In this embodiment, since the charging voltage of the battery 1300 is usually a fixed value and is smaller than the voltage of the power pin VBUS of the charging interface 1400, the duty ratio of the seventh control signal and the eighth control signal may be adjusted, so that the obtained stepped-down power voltage is equal to the battery voltage after the power voltage is stepped down.

In the embodiment of the application, when the charger is connected, the second voltage adjustment module 4240 performs voltage reduction processing on the power supply voltage and then charges the battery, and the second voltage adjustment module 4240 is multiplexed to perform voltage reduction processing, so that the circuit architecture can be simplified, and the circuit area and the cost of the power supply circuit can be reduced.

In one embodiment, the first switch 4211, the second switch 4212, the third switch 4213 and the fourth switch 4214 are all located within another charge cell.

In this embodiment, by multiplexing the first switch, the second switch, the third switch and the fourth switch inside the other charging chip, the circuit architecture of the power supply circuit can be simplified, and the circuit area and the cost of the power supply circuit can be reduced.

Further, the second signal generating module 4220 in this embodiment may be disposed inside the other charging chip, that is, provided by the other charging chip; or may be provided outside the other charging chip, i.e. provided by a chip other than the other charging chip.

In one embodiment of the present disclosure, the third power supply port 4230 is connected with the first power supply port 1500, and the fourth power supply port 4250 is connected with the second power supply port 1700.

In one embodiment, as shown in fig. 5, a first terminal of the first switch 4211 is connected to the ground pin GND through a fourth capacitor 4261.

In this embodiment, by providing a fourth capacitor for filtering at the first end of the first switch 4211, the supply voltage connected to the first end of the first switch 4211 can be more stable.

In one embodiment, as shown in fig. 5, the third power supply port 4230 is connected to the ground pin GND through a fifth capacitor 4262.

In this embodiment, by providing the fifth capacitor for filtering at the third power supply port, the voltage output by the third power supply port can be more stable.

In one embodiment, as shown in fig. 5, the fourth power supply port 4250 is connected to the ground pin GND through a sixth capacitor 4263.

In this embodiment, the sixth capacitor for filtering is disposed at the fourth power supply port, so that the voltage output by the fourth power supply port is more stable.

In one embodiment, the first switch 4211, the second switch 4212, the third switch 4213, and the fourth switch 4214 may also be triodes.

< electronic device embodiment >

The embodiment provides an electronic device. The electronic device may comprise the power supply circuit of any of the embodiments described above.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one.. Said.", it is not intended to exclude that an additional identical element is present in a process, method, article or apparatus that comprises the same element.

While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A power supply circuit, characterized by comprising a first switch (1110), a first signal generating module (1200), a battery (1300), a charging interface (1400) and a first power supply port (1500) for connecting a first consumer;

the charging interface (1400) is provided with a power supply pin (VBUS) and a ground pin (GND), and the power supply pin (VBUS) is connected with the first power supply port (1500); the grounding pin (GND) is connected with the negative electrode of the battery (1300);

a first end of the first switch (1110) is electrically connected with the power supply pin (VBUS), a second end of the first switch (1110) is electrically connected with the first power supply port (1500), and a control end of the first switch (1110) is connected with the first signal generation module (1200) to access a first control signal;

the first signal generation module (1200) is configured to control the first switch (1110) to be turned on when a power supply pin (VBUS) of the charging interface (1400) is connected to a power supply voltage, so that the first power supply port (1500) outputs the power supply voltage.

2. A supply circuit according to claim 1, further comprising a first voltage adjustment module (1600), a second switch (1120), and a second supply port (1700), wherein a first terminal of the first voltage adjustment module (1600) is electrically connected to a first terminal of the second switch (1120), wherein a first terminal of the first voltage adjustment module (1600) is also electrically connected to the second supply port (1700), and wherein a second terminal of the first voltage adjustment module (1600) is electrically connected to the first supply port (1500); the control end of the second switch (1120) is connected with the first signal generating module (1200) to access a second control signal, and the second end of the second switch (1120) is connected with the anode of the battery (1300); under the condition that a power supply pin (VBUS) of the charging interface (1400) is not connected with a power supply voltage, the first signal generation module (1200) is used for controlling the second switch (1120) to be conducted, so that the second power supply port (1700) loads the voltage of the battery (1300);

the first voltage adjustment module (1600) is configured to boost a voltage of the battery (1300), so that the first power supply port (1500) outputs the boosted voltage of the battery (1300).

3. The power supply circuit of claim 2, wherein the first voltage adjustment module (1600) comprises a third switch (1130), a fourth switch (1140), and an inductor (1610);

a first end of the third switch (1130) is connected to the first power supply port (1500), a second end of the third switch (1130) is connected to a first end of the fourth switch (1140), a control end of the third switch (1130) is connected to a third control signal, a second end of the fourth switch (1140) is connected to the ground pin (GND), and a control end of the fourth switch (1140) is connected to a fourth control signal; a first terminal of the inductor (1610) is connected to a second terminal of the third switch (1130), a second terminal of the inductor (1610) is connected to the second power supply port (1700), and a second terminal of the inductor (1610) is connected to a first terminal of the second switch (1120).

4. The power supply circuit according to claim 2, wherein the first signal generating module (1200) controls the first switch (1110) and the second switch (1120) to be turned on when a power supply pin (VBUS) of the charging interface (1400) is connected to the power supply voltage, and the first voltage adjusting module (1600) is configured to perform voltage reduction processing on the power supply voltage input through the first switch (1110), so that the reduced power supply voltage charges the battery (1300).

5. The power supply circuit of claim 3, wherein the first switch (1110), the second switch (1120), the third switch (1130), and the fourth switch (1140) are all located within a charge chip.

6. The supply circuit according to claim 2, characterized in that the supply pin (VBUS) is connected to the ground pin (GND) through a first capacitor (1810); or

The first power supply port (1500) is connected with the grounding pin (GND) through a second capacitor (1820); or

The second power supply port (1700) is connected to the ground pin (GND) via a third capacitor (1830).

7. The power supply circuit of claim 1, further comprising a motor drive circuit (1900), wherein the first power supply port (1500) is connected to the motor drive circuit (1900).

8. A power supply circuit, characterized in that it comprises a first power supply circuit (4100) and a second power supply circuit (4200), the first power supply circuit (4100) comprising a power supply circuit according to claim 1, the second power supply circuit (4200) further comprising a first switch (4211), a second signal generating means (4220) and a third power supply port (4230); a first end of the first switch (4211) is electrically connected with the power supply pin (VBUS), a second end of the first switch (4211) is electrically connected with the third power supply port (4230), and a control end of the first switch (4211) is connected with the second signal generation module (4220) to access a fifth control signal;

the second signal generation module (4220) is configured to control the first on-off device (4211) to be turned on when a power supply pin (VBUS) of the charging interface (1400) is connected to a power supply voltage, so that the third power supply port (4230) outputs the power supply voltage.

9. The power supply circuit according to claim 8, further comprising a second voltage adjusting module (4240), a second switch (4212) and a fourth power supply port, wherein a first end of the second voltage adjusting module (4240) is electrically connected to a first end of the second switch (4212), a first end of the second voltage adjusting module (4240) is further electrically connected to the fourth power supply port, and a second end of the second voltage adjusting module (4240) is electrically connected to the third power supply port (4230); the control end of the second switch (4212) is connected with the second signal generating module (4220) to access a sixth control signal, and the second end of the second switch (4212) is connected with the positive electrode of the battery (1300); under the condition that a power supply pin (VBUS) of the charging interface (1400) is not connected with the power supply voltage, the second signal generation module (4220) is used for controlling the second switch (4212) to be switched on, so that the fourth power supply port loads the voltage of the battery (1300);

the second voltage adjusting module (4240) is configured to boost the voltage of the battery (1300), so that the third power supply port (4230) outputs the boosted voltage of the battery (1300).

10. An electronic device comprising the power supply circuit of any one of claims 1-9.