CN116545083B

CN116545083B - Charging circuit, electronic equipment and power adapter

Info

Publication number: CN116545083B
Application number: CN202310764302.5A
Authority: CN
Inventors: 马雷; 武渊; 王朝; 马波
Original assignee: Honor Device Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2023-06-27
Filing date: 2023-06-27
Publication date: 2024-07-09
Anticipated expiration: 2043-06-27
Also published as: CN116545083A

Abstract

The application discloses a charging circuit, electronic equipment and a power adapter, and relates to the technical field of circuits. The charging circuit comprises a charging module, a sampling module and a processing module. The charging module is used for receiving the electric energy output by the power adapter and charging the energy storage module. The sampling module is used for detecting the input voltage of the power adapter. The processing module can receive the input voltage of the power adapter output by the sampling module and adjust the output power output by the charging module to the energy storage module according to the input voltage. When the input voltage of the power adapter is lower, the processing module can control the output power of the charging module to be smaller, so that the power adapter can output smaller power, at the moment, the current in the power adapter is smaller, the heating is less, and the over-temperature protection mechanism of the power adapter can be prevented from being triggered, and the power adapter can continuously charge the electronic equipment.

Description

Charging circuit, electronic equipment and power adapter

Technical Field

The present application relates to the field of circuit technologies, and in particular, to a charging circuit, an electronic device, and a power adapter.

Background

Electronic devices such as cell phones, tablet computers, etc. typically require charging through a power adapter. The power adapter includes a communication module. When the input end of the power adapter is connected with the mains supply and the output end of the power adapter is connected with the electronic equipment, the communication module is communicated with the electronic equipment on one hand and outputs electric energy to the electronic equipment on the other hand. The electronic equipment comprises a charging module and an energy storage module, and electric energy output by the power adapter is output to the energy storage module through the charging module.

In the related art, after an electronic device is connected to a power adapter, the maximum output power of the power adapter can be obtained by communicating with a communication module of the power adapter. After the maximum output power of the power adapter is obtained, the electronic equipment can control the output power of the charging module to the energy storage module according to the maximum output power of the power adapter, so that the power adapter outputs the maximum power.

However, the mains voltage may be different in different regions, and when the mains voltage to which the power adapter is connected is low, the input voltage of the power adapter is low. In this case, if the power adapter still outputs the maximum power, the current in the power adapter is large, and the heat is generated more, which may trigger the over-temperature protection mechanism of the power adapter, so that the power adapter cannot charge the electronic device.

Disclosure of Invention

The application provides a charging circuit, electronic equipment and a power adapter. The technical scheme is as follows:

In a first aspect, a charging circuit is provided. The charging circuit is applied to the electronic equipment and is used for being connected with the power adapter so as to charge the energy storage module in the electronic equipment. The charging circuit includes: the device comprises a charging module, a sampling module and a processing module.

The charging module is provided with an input end, an output end and a control end. When the electronic equipment is connected with the power adapter, the input end of the charging module is connected with the voltage output end of the power adapter. The output end of the charging module is used for being connected with an energy storage module of the electronic equipment. Therefore, the electric energy output by the power adapter can be output to the energy storage module through the charging module, so that the energy storage module is charged. The sampling module has an input and an output. When the electronic equipment is connected with the power adapter, the input end of the sampling module is connected with the input end of the power adapter so as to detect the input voltage of the power adapter. The output end of the sampling module is connected with the input end of the processing module so as to output the detected input voltage of the power adapter to the processing module.

The output end of the processing module is connected with the control end of the charging module, so that the processing module can control the output power of the charging module to the energy storage module. The processing module is used for: and receiving the input voltage of the power adapter output by the sampling module, and regulating the output power of the charging module according to the input voltage of the power adapter so as to enable the power adapter to continuously output electric energy to the charging module.

In the application, the charging circuit comprises a charging module, a sampling module and a processing module. The charging module is used for receiving the electric energy output by the power adapter and charging the energy storage module of the electronic equipment. The sampling module is used for detecting the input voltage of the power adapter. When the processing module works, the input voltage of the power adapter output by the sampling module can be received, and the output power of the charging module to the energy storage module can be regulated according to the input voltage of the power adapter. Therefore, when the input voltage of the power adapter is higher, the processing module can control the output power of the charging module to be output to the energy storage module to be larger, so that the power adapter outputs larger power, the hardware capacity of the power adapter is fully exerted, and the charging speed is ensured. When the input voltage of the power adapter is low, the processing module can control the output power of the charging module to the energy storage module to be smaller, so that the power adapter outputs smaller power. When the power adapter outputs smaller power, the current in the power adapter is smaller, and the heat is less, so that the over-temperature protection mechanism of the power adapter can be prevented from being triggered, and the power adapter can continuously charge the electronic equipment.

In some embodiments, when the electronic device is connected to the power adapter, the input of the sampling module is connected to the input of the power adapter through the communication terminal of the power adapter.

In some embodiments, the sampling module includes a filtering unit and a sampling unit. The input end of the filtering unit is used for being connected with the communication end of the power adapter. The output end of the filtering unit is connected with the input end of the sampling unit. The sampling unit is used for: detecting the output voltage of the filtering unit, obtaining the input voltage of the power adapter according to the corresponding relation between the output voltage of the filtering unit and the input voltage of the power adapter, and outputting the input voltage of the power adapter to the processing module.

In some embodiments, the filter unit includes a first capacitor and a first resistor. The first polar plate of the first capacitor is used for being connected with the communication end of the power adapter. The second polar plate of the first capacitor is connected with the first end of the first resistor and the input end of the sampling unit. The second end of the first resistor is connected with the first ground wire.

In some embodiments, the charging circuit further comprises a notch module. The first end of the notch module is used for being connected with the communication end of the power adapter, and the second end of the notch module is connected with the communication end of the processing module.

In some embodiments, the processing module stores a plurality of voltage ranges and a plurality of preset powers, and the plurality of voltage ranges and the plurality of preset powers are in one-to-one correspondence. The processing module is used for: and receiving the input voltage of the power adapter output by the sampling module, and if the input voltage of the power adapter is in any one of a plurality of voltage ranges, adjusting the output power of the charging module to be the preset power corresponding to the one voltage range. Wherein the plurality of voltage ranges includes a first voltage range and a second voltage range. The plurality of preset powers includes a first preset power and a second preset power. The first voltage range corresponds to a first preset power and the second voltage range corresponds to a second preset power. The minimum value of the first voltage range is larger than the maximum value of the second voltage range, and the first preset power is larger than the second preset power.

In a second aspect, there is also provided an electronic device comprising an energy storage module and a charging circuit as in any of the first aspects.

In a third aspect, a power adapter is also provided for charging an energy storage module of an electronic device. The electronic device comprising a charging circuit as in any one of the first aspects. The power adapter has an input, a voltage output, and a communication terminal. The input end of the power adapter is used for being connected with the mains supply, and the input end of the power adapter is connected with the communication end of the power adapter. When the power adapter is connected with the electronic equipment, the communication end of the power adapter is connected with the input end of the sampling module, and the voltage output end of the power adapter is connected with the input end of the charging module.

In some embodiments, the power adapter further comprises: a second capacitor, a second resistor and a third resistor. The first polar plate of the second capacitor is connected with the input end of the power adapter, and the second polar plate of the second capacitor is connected with the first end of the second resistor. The second end of the second resistor is connected with the first end of the third resistor and the communication end of the power adapter, and the second end of the third resistor is connected with the first ground wire.

In some embodiments, the mains supply comprises a live line and a neutral line, and the first plate of the second capacitor is adapted to be connected to one of the live line and the neutral line.

In some embodiments, the communication terminals of the power adapter include an in-phase data terminal and an anti-phase data terminal. When the power adapter is connected with the electronic equipment, one of the in-phase data end and the opposite-phase data end is connected with the input end of the sampling module.

In a fourth aspect, a charging system is also provided. The charging system comprises an electronic device as in the second aspect and a power adapter as in any of the third aspects.

The technical effects obtained by the second, third and fourth aspects are similar to the technical effects obtained by the corresponding technical means in the first aspect, and are not described in detail herein.

Drawings

Fig. 1 is a schematic diagram of a charging scenario of a first electronic device;

FIG. 2 is a schematic diagram of a charging scenario of a second electronic device;

FIG. 3 is a schematic diagram of an exploded construction of an electronic device;

FIG. 4 is a schematic diagram showing a connection structure of a first power adapter and an electronic device in the related art;

fig. 5 is a schematic diagram of a connection structure of a second power adapter and an electronic device in the related art;

fig. 6 is a schematic diagram of a connection structure of a third power adapter and an electronic device in the related art;

fig. 7 is a schematic diagram of a connection structure of a fourth power adapter and an electronic device in the related art;

Fig. 8 is a schematic diagram of a connection structure between a first power adapter and an electronic device according to an embodiment of the present application;

FIG. 9 is a schematic diagram of a connection structure between a second power adapter and an electronic device according to an embodiment of the present application;

Fig. 10 is a schematic diagram of a connection structure between a third power adapter and an electronic device according to an embodiment of the present application;

FIG. 11 is a schematic diagram of a fourth connection structure between a power adapter and an electronic device according to an embodiment of the present application;

fig. 12 is a block diagram of a charging circuit according to an embodiment of the present application;

fig. 13 is a circuit configuration diagram of a charging circuit according to an embodiment of the present application;

FIG. 14 is a schematic diagram of a fifth power adapter and electronic device connection structure according to an embodiment of the present application;

fig. 15 is a schematic diagram of a connection structure between a sixth power adapter and an electronic device according to an embodiment of the present application;

Fig. 16 is a schematic diagram of a connection structure between a seventh power adapter and an electronic device according to an embodiment of the present application;

fig. 17 is a diagram showing a correspondence between an output voltage of a filtering unit and an input voltage of a power adapter according to an embodiment of the present application.

Wherein, the meanings represented by the reference numerals are respectively as follows:

Related technology:

10. An electronic device; 110. a display screen; 120. a rear cover; 130. a middle frame; 131. a metal plate; 132. a top rim; 133. a bottom frame; 134. a left frame; 135. a right frame; 140. a main board; 142. a charging module; 144. a processing module; 150. an energy storage module; 162. a front-facing camera; 164. a rear camera; 20. a charger; 22. a power adapter; 222. a rectifying module; 224. a transformation module; 2242. a processor; 226. a communication module; 24. a charging wire;

The application comprises the following steps:

30. an electronic device; 310. a charging circuit; 312. a charging module; 314. a sampling module; 3142. a filtering unit; 3144. a sampling unit; 316. a processing module; 3162. a processing unit; 3164. a communication unit; 318. a notch module; 3182. a first notch unit; 3184. a second notch unit; 320. an energy storage module; 40. a power adapter; 410. a rectifying module; 420. a transformation module; 422. a processor; 430. a communication module; 440. and a suppression module.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application. Wherein, in the description of the embodiments of the present application, unless otherwise indicated, "/" means or, for example, a/B may represent a or B; "and/or" herein is merely an association relationship describing an association object, and means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. In addition, in the description of the embodiments of the present application, "plurality" means two or more than two.

For the purpose of clarity in describing the technical solution of the present application, the words "first", "second", etc. are used to distinguish between identical items or similar items having substantially the same function and effect. It will be appreciated by those of skill in the art that the words "first," "second," and the like do not limit the amount and order of execution, and that the words "first," "second," and the like do not necessarily differ.

Reference in the specification to "one embodiment" or "some embodiments" or the like means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," and the like in the specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments" unless expressly specified otherwise. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless expressly specified otherwise.

Before explaining the charging circuit provided by the embodiment of the application in detail, an application scenario of the charging circuit is described.

Electronic devices include cell phones, tablet computers, wearable devices, augmented Reality (AR) devices, virtual Reality (VR) devices, notebook computers, ultra-mobile personal computer (UMPC), netbooks, personal Digital Assistants (PDA), and the like. FIGS. 1 and 2 are schematic diagrams of two different charging scenarios for an electronic device 10, the electronic device 10 being a cell phone in the embodiment shown in FIG. 1; in the embodiment shown in fig. 2, the electronic device 10 is a tablet computer. As shown in fig. 1 and 2, the electronic device 10 needs to be charged by a charger 20. The charger 20 includes a power adapter 22 and a charging cord 24. When the charger 20 charges the electronic device 10, the power adapter 22 is used for being connected to the mains, and the charging wire 24 is connected between the power adapter 22 and the electronic device 10.

The electronic device 10 in the embodiment of the present application may also be referred to as: a terminal device, a User Equipment (UE), a Mobile Station (MS), a Mobile Terminal (MT), a mobile intelligent terminal device, an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a subscriber terminal, a wireless communication device, a user agent, a user equipment, or the like.

Fig. 3 is an exploded view of an electronic device 10, wherein the electronic device 10 is shown as a cellular phone. As shown in fig. 3, the electronic device 10 includes: the display screen 110, the rear cover 120, the middle frame 130, the main board 140 and the energy storage module 150. The middle frame 130, the main board 140 and the energy storage module 150 are disposed between the display screen 110 and the rear cover 120. The main board 140 and the energy storage module 150 may be disposed on the middle frame 130, for example, the main board 140 and the energy storage module 150 are disposed on a side of the middle frame 130 facing the rear cover 120. In other embodiments, the main board 140 and the energy storage module 150 may also be disposed on a side of the middle frame 130 facing the display screen 110.

The energy storage module 150 may be connected to other devices through a charging module and a discharging module (not shown). When the electronic device 10 is connected to the charger 20, the electric energy output from the charger 20 may be output to the energy storage module 150 through the charging module, so as to charge the energy storage module 150. The discharging module may receive the electric energy output by the energy storage module 150 and supply power to the processing module, the internal memory, the external memory, the display 110, the camera, the speaker, the communication module, etc. in the electronic device 10. The processing modules here include a central processing unit (central processing unit, CPU), a graphics processing unit (graphics processing unit, GPU), baseband, and the like. The charging module and the discharging module may also be used to detect parameters such as capacity, cycle number, health status (leakage, impedance) of the energy storage module 150. In some embodiments, the charging module and the discharging module may also be integrated in the motherboard 140.

The display 110 may be an Organic LIGHT EMITTING Diode (OLED) display, or a Liquid Crystal Display (LCD) display. It should be appreciated that the display screen 110 may include a display for outputting display content to a user and a touch device for receiving touch events entered by the user on the display screen 110.

The rear cover 120 may be a metal rear cover, a glass rear cover, a plastic rear cover, or a ceramic rear cover, and in the embodiment of the present application, the material of the rear cover 120 is not limited.

The middle frame 130 may include a metal plate 131 and a rim. Wherein, the frame is enclosed at the outer edge of the metal plate 131. Generally, the bezel may be a square. For example, as shown in fig. 3, the rims may include a top rim 132 and a bottom rim 133 disposed opposite each other, and a left rim 134 and a right rim 135 disposed between the top rim 132 and the bottom rim 133 and disposed opposite each other. In this embodiment, the side surfaces of the middle frame 130 are the surfaces surrounded by the top frame 132, the bottom frame 133, the left frame 134 and the right frame 135. The metal plate 131 may be an aluminum plate, an aluminum alloy, or a magnesium alloy. Each frame can be a metal frame, a ceramic frame or a glass frame. The metal middle frame 130 and the frame may be welded, clamped or integrally formed, or the metal middle frame 130 and the frame may be injection-molded and connected by plastic parts.

The motherboard 140 is one of the important components of the terminal device, and is a carrier necessary for software implementation. The main board 140 includes: substrate, functional device mounted on the substrate, and other components mounted on the substrate. Functional devices include, but are not limited to: a charging module and a discharging module for converting voltage, a Power Amplifier (PA) for amplifying signals, a processing module for processing signals, a memory for storing data, a sensor (e.g., a pressure sensor, a gyroscope sensor, a barometric sensor, a magnetic sensor, an acceleration sensor, a distance sensor, a proximity sensor, a temperature sensor, an ambient light sensor, a bone conduction sensor, etc.), a timing controller for controlling the display of the display screen 110, or a device for controlling other functions (e.g., a charging function, etc.) may be used. The embodiment of the application is not limited to the specific functions of the functional device. Other components include, but are not limited to, resistors, capacitors, inductors, memory cards, sensors or shields, etc. The main plate 140 may also include nuts, bolts, etc. for securing. The component may be mounted on the substrate by solder joints.

It will be appreciated that motherboard 140 may have raised and/or recessed positions based on different components. The specific shape of the motherboard 140, the location and size of the components, etc. are related to the design layout of the terminal device, which is not particularly limited in the embodiment of the present application.

In some embodiments, as shown in FIG. 3, a camera and a flash (not shown) may also be included in the electronic device 10. The cameras may include a front camera 162 and a rear camera 164. Wherein, the rear camera 164 and the flash lamp may be disposed on a surface of the metal plate 131 facing the rear cover 120, and the rear cover 120 is provided with a mounting hole for mounting the flash lamp and the rear camera 164. The front camera 162 may be provided on a side of the metal plate 131 facing the display screen 110. In some embodiments, front-facing camera 162 disposed within electronic device 10 may include one or more cameras, and rear-facing camera 164 may also include one or more cameras.

The related art of the present application is described below.

Fig. 4 is a schematic diagram of a connection structure of the power adapter 22 and the electronic device 10 in the related art. As shown in fig. 4, the power adapter 22 includes a rectification module 222, a transformation module 224, and a communication module 226. The commercial power comprises a live wire L and a zero wire N for outputting alternating current. The input end of the rectifying module 222 is the input end of the power adapter 22. The input end of the rectifying module 222 is used for being connected with the mains supply, so that the rectifying module 222 can rectify the alternating current output by the mains supply and output direct current. The transforming module 224 is connected between the output end of the rectifying module 222 and the input end of the communication module 226, and is configured to transform the dc power output by the rectifying module 222 and output the transformed dc power to the communication module 226. The output of the communication module 226 is the output of the power adapter 22. The output terminals of the communication module 226 include a voltage output terminal and a communication terminal. In the embodiment shown in fig. 4, the voltage output of the illustrated communication module 226 includes a power port VBUS and a ground port G1, and the communication terminal of the illustrated communication module 226 includes an in-phase data terminal d+ and an anti-phase data terminal D-. When the input terminal of the power adapter 22 is connected to the mains and the output terminal of the power adapter 22 is connected to the electronic device 10, the power port VBUS and the ground port G1 of the communication module 226 may output power to the electronic device 10, and the in-phase data terminal d+ and the anti-phase data terminal D-of the communication module 226 may communicate with the electronic device 10.

Fig. 5 is a schematic diagram showing a connection structure between the electronic device 10 and another power adapter 22 in the related art. As shown in fig. 5, the electronic device 10 includes a charging module 142, an energy storage module 150, and a processing module 144. The charging module 142 has an input terminal, an output terminal c, and a control terminal d. The input of the charging module 142 includes port a and port b. When the electronic device 10 is connected to the power adapter 22, the port a is connected to the power port VBUS of the communication module 226, and the port b is connected to the ground port G1 of the communication module 226, so that the power adapter 22 can output electric power to the charging module 142. The output terminal c of the charging module 142 is connected to the energy storage module 150, so that the electric energy output by the power adapter 22 is output to the energy storage module 150 through the charging module 142, and the energy storage module 150 is charged. The processing module 144 has a communication terminal and an output terminal g. The communication end of the processing module 144 includes a port e and a port f. When the electronic device 10 is connected to the power adapter 22, the port e is connected to the in-phase data terminal d+ of the communication module 226 and the port f is connected to the opposite-phase data terminal D-of the communication module 226, so that communication between the communication module 226 of the power adapter 22 and the processing module 144 of the electronic device 10 can be performed by transmitting differential signals. The output terminal g of the processing module 144 is connected to the control terminal d of the charging module 142, so that the processing module 144 can control the power of the charging module 142 to output electric energy to the energy storage module 150, i.e. control the output power of the charging module 142.

After the electronic device 10 is connected to the power adapter 22, the processing module 144 of the electronic device 10 may communicate with the communication module 226 of the power adapter 22 to obtain the maximum output power that the power adapter 22 can support. After obtaining the maximum output power of the power adapter 22, the electronic device 10 may control the output power output from the charging module 142 to the energy storage module 150 according to the maximum output power of the power adapter 22, so that the power adapter 22 outputs at the maximum power. That is, the existing power adapter 22 is pumped by the charging module 142 of the electronic device 10 during operation, so that the output power of the power adapter 22 is determined by the output power of the charging module 142 in the electronic device 10, rather than by the power adapter 22 itself.

However, the mains voltage may be different in different regions. For example, the mains voltage in some regions is 220V (volts), and the mains voltage in other regions may be 110V, 230V, 240V, 127V, or the like. When the mains voltage to which the power adapter 22 is connected is low, the input voltage of the power adapter 22 is low. In this case, if the power adapter 22 still outputs the maximum power, the current in the power adapter 22 is larger and the heat is generated more, which may trigger the over-temperature protection mechanism of the power adapter 22, so that the power adapter 22 cannot charge the electronic device 10.

In the related art, the following two technical schemes are generally adopted to avoid the problem of triggering the over-temperature protection mechanism of the power adapter 22 due to the low mains voltage to which the power adapter 22 is connected.

In a first scheme, as shown in fig. 6, the transforming module 224 in the power adapter 22 includes a first winding L1, a second winding L2, a capacitor C1, a resistor R1, a diode D1, a transistor Q1, a capacitor C4, a resistor R2, a resistor R3, a diode D2, a capacitor C3, and a processor 2242. In operation of the power adapter 22, the processor 2242 may output a pulse width modulation (pulse width modulation, PWM) signal to control the on and off of the transistor Q1, so that the second winding L2 outputs an electrical signal to the communication module 226.

After the power adapter 22 is connected to the mains supply, the communication module 226 can detect the voltage output from the cathode of the diode D2 to the communication module 226, and calculate the mains supply voltage connected to the rectifying module 222 according to the voltage. In this way, when the power adapter 22 is connected to the electronic device 10, the processing module 144 of the electronic device 10 may communicate with the communication module 226 of the power adapter 22 to obtain the mains voltage, and accordingly control the output power of the charging module 142, so that the output power of the charging module 142 is smaller when the mains voltage to which the power adapter 22 is connected is lower.

However, this solution still has some problems. For example, in the existing charging protocols of the power adapter 22 and the electronic device 10, the communication modes are: the processing module 144 of the electronic device 10 sends a communication signal for querying the maximum output power of the power adapter 22 and the mains voltage to which the power adapter 22 is connected; upon receiving the communication signal, the communication module 226 of the power adapter 22 outputs a feedback signal to the processing module 144 of the electronic device 10, the feedback signal including the maximum output power of the power adapter 22 and the utility voltage to which the power adapter 22 is connected. Whereas in existing charging protocols, the electronic device 10 will only send a communication signal when connected to the power adapter 22; after the start of charging, the electronic device 10 does not send a communication signal again to query the maximum output power of the power adapter 22 and the mains voltage to which the power adapter 22 is connected. In this case, if the mains voltage drops during the charging of the electronic device 10, the electronic device 10 may not obtain the mains voltage in time, and therefore, the over-temperature protection mechanism of the power adapter 22 may be triggered, so that the power adapter 22 may stop charging the electronic device 10. The charging protocols herein include Quick Charge (QC) protocol, power Delivery (PD) protocol, super charge protocol (super charge protocol, SCP), quick charge protocol (FAST CHARGER protocol, FCP), super flash charge (superVOOC) protocol, programmable power supply (programmable power supply, PPS) protocol, adaptive quick charge (ADAPTIVE FAST CHARGE, AFC) protocol, and the like.

In some aspects, the communication module 226 in the power adapter 22 may also cease outputting power to the electronic device 10 when a mains voltage dip is detected. In this case, the electronic device 10 will send a communication signal again to inquire the maximum output power of the power adapter 22 and the mains voltage to which the power adapter 22 is connected, corresponding to the electronic device 10 being newly connected to the power adapter 22. In this case, however, the charging of the electronic device 10 by the power adapter 22 is also disconnected, affecting the user experience.

In a second scenario, as shown in fig. 7, a resistor R0 may be further included in the transformation module 224 of the power adapter 22. The resistor R0 is a sampling resistor, and the processor 2242 can detect the output voltage of the rectifying module 222 through the resistor R0, thereby obtaining the mains voltage connected to the power adapter 22. When the processor 2242 obtains that the mains voltage to which the power adapter 22 is connected is low, the control transistor Q1 is turned off, and at this time, the power adapter 22 cannot output power. That is, in this scheme, when the mains voltage to which the power adapter 22 is connected is low, the power adapter 22 stops operating, thereby avoiding that a large amount of heat of the power adapter 22 triggers the over-temperature protection mechanism. Therefore, this scheme has a problem in that the electronic device 10 cannot be charged when the mains voltage is low, and the charging compatibility of the power adapter 22 is poor.

Therefore, the embodiment of the application provides a charging circuit, electronic equipment and a power adapter, wherein when the electronic equipment applied by the charging circuit is charged through the power adapter, the output power of the power adapter can be adjusted according to the mains voltage, so that an over-temperature protection mechanism of the power adapter is prevented from being triggered, and the power adapter can continuously charge the electronic equipment.

The charging circuit provided in the embodiment of the application is explained in detail below. In the embodiment of the application, the connection between two electrical structures (including an electronic device, an electrical unit and an electrical module) is electrical connection, and the electrical connection refers to that the two electrical structures can transmit an electrical signal through connection. In addition, the electrical connection between the two electrical structures may be directly connected through a wire, or may be indirectly connected through other electrical structures. In the description of the embodiments of the present application, reference numerals of the respective electrical structures are not followed by those of the electrical structures in the related art described above.

Fig. 8 is a schematic diagram of a connection structure between a power adapter 40 and an electronic device 30 according to an embodiment of the present application. As shown in fig. 8, the power adapter 40 has an input terminal and a voltage output terminal q. The input of the power adapter 40 includes a port p1 and a port p2. When the power adapter 40 is connected to the mains, one of the ports p1 and p2 is connected to the live line L, and the other of the ports p1 and p2 is connected to the neutral line N. The utility power may be used to output alternating current at any voltage from 80V to 267V. For example, the mains voltage may be 80V, 90V, 110V, 120V, 127V, 140V, 160V, 220V, 260V, or 267V. The voltage output q of the power adapter 40 is used to output power. In general, the voltage output terminal q of the power adapter 40 outputs electric power to the electronic device 30 through a charging line, which is not shown in the drawing. The charging circuit 310 is applied to the electronic device 30, and the electronic device 30 further includes an energy storage module 320, where the charging circuit 310 is configured to charge the energy storage module 320. The charging circuit 310 includes a charging module 312, a sampling module 314, and a processing module 316.

The charging module 312 has an input a, an output b, and a control c. The input a of the charging module 312 is for connection to the voltage output q of the power adapter 40. That is, when the electronic device 30 is connected to the power adapter 40, the input terminal a of the charging module 312 is connected to the voltage output terminal q of the power adapter 40. It is understood that the connection of the electronic device 30 and the power adapter 40 means that the electronic device 30 is connected to the power adapter 40 through a charging cord, which will not be described in detail below. The output b of the charging module 312 is configured to be connected to the energy storage module 320 of the electronic device 30. In this way, when the power adapter 40 is connected between the utility power and the electronic device 30, the electric energy output by the power adapter 40 can be output to the energy storage module 320 through the charging module 312, so as to charge the energy storage module 320. The control terminal c of the charging module 312 is used for inputting a control signal, where the control signal is used for controlling the operation of the charging module 312, i.e. controlling the output power of the charging module 312 for outputting electric energy to the energy storage module 320. In some specific embodiments, the charging module 312 may be a charge-discharge chip with voltage regulation. In this case, the charging module 312 includes at least one of a buck conversion (buck) circuit, a boost conversion (boost) circuit. The control signal may control the output power of the charging module 312 by controlling the duty cycle and operating frequency of the switching devices in the buck and boost circuits. Specifically, the control signal may be a pulse signal formed by alternately using a high-level signal and a low-level signal, for example, the high-level signal is used to control the on of a switching device in the buck circuit and the boost circuit, the low-level signal is used to control the off of the switching device, and an adjacent high-level signal and low-level signal are referred to as a signal period, so that the duty ratio of the switching device refers to the ratio of the duration of the high-level signal to the duration of the signal period in which the high-level signal is located, and the operating frequency of the switching device refers to the number of signal periods in a unit time (such as 1 second).

The sampling module 314 has an input d and an output e. The input d of the sampling module 314 is adapted to be connected to an input of the power adapter 40. That is, when the electronic device 30 is connected to the power adapter 40, the input d of the sampling module 314 is connected to the port p1 or the port p2 of the power adapter 40. Thus, when the electronic device 30 is connected to the power adapter 40, the sampling module 314 can detect the input voltage of the power adapter 40, that is, detect the mains voltage (the voltage of the live wire L or the neutral wire N) connected to the input terminal of the voltage adapter. The output e of the sampling module 314 is used for outputting the input voltage of the power adapter 40 detected by the sampling module 314.

The processing module 316 has an input f and an output g. The input f of the processing module 316 is connected to the output e of the sampling module 314 so that the processing module 316 can receive the input voltage of the power adapter 40 output by the sampling module 314. The output g of the processing module 316 is connected to the control c of the charging module 312, so that the processing module 316 can control the operation of the charging module 312 by outputting a control signal to the control c of the charging module 312. As described above, the control signal output from the output terminal g of the processing module 316 is used to control the output power of the charging module 312 to output the electric energy to the energy storage module 320. That is, in an embodiment of the present application, the processing module 316 is operative to: the input voltage of the power adapter 40 output by the sampling module 314 is received, and the output power of the charging module 312 is adjusted according to the input voltage of the power adapter 40. Here, when the input voltage of the power adapter 40 is high, the processing module 316 may control the output power of the charging module 312 to be greater to the energy storage module 320, so that the power adapter 40 outputs a greater power, and fully plays the hardware capability of the power adapter 40, and ensures the charging speed. The processing module 316 may also control the output power of the charging module 312 to the energy storage module 320 to be smaller when the input voltage of the power adapter 40 is lower, so that the power adapter 40 outputs a smaller power. When the power adapter 40 outputs smaller power, the current in the power adapter 40 is smaller, and the heat is less, so that the over-temperature protection mechanism of the power adapter 40 can be prevented from being triggered, and the power adapter 40 can continuously charge the electronic device 30. It will be appreciated that in an embodiment of the present application, the sampling module 314 may detect the input voltage of the power adapter 40 in real time, so that the processing module 316 may adjust the output power of the charging module 312 according to the input voltage of the power adapter 40 at any time. Therefore, when the electronic device 30 applied by the charging circuit 310 provided by the embodiment of the application is charged through the power adapter 40, the charging circuit is not only applicable to various different voltages of mains supply without triggering an over-temperature protection mechanism of the power adapter 40, but also can adaptively adjust the output power of the power adapter 40 when the mains supply voltage is suddenly changed, so that the power adapter 40 can continuously charge the electronic device 30 when the mains supply voltage is suddenly changed, and the user experience is improved. In addition, the charging circuit 310 has the advantages of simple design, low cost, simple algorithm, safety and reliability.

In some particular embodiments, the processing module 316 may be a System On Chip (SOC) in the electronic device 30, the SOC in the electronic device 30 including a CPU, GPU, baseband, and the like. In another specific embodiment, the processing module 316 may also be an electronic device with processing functions in the electronic device 30 independent of the SOC.

As one implementation, the processing module 316 may store a plurality of voltage ranges and a plurality of preset powers, where the plurality of voltage ranges and the plurality of preset powers are in one-to-one correspondence. The plural herein means two or more integers. In some specific embodiments, the plurality of voltage ranges and the plurality of preset powers may be as shown in table 1 below.

TABLE 1

That is, any two voltage ranges among the plurality of voltage ranges have no overlapping portions. Each voltage range corresponds to a preset power. In the embodiment shown in Table 1, V1 is less than V2, V2 is less than V3, V3 is less than V4, and P1 is less than P2, P2 is less than P3. In this case, the processing module 316 may specifically be configured to adjust the output power of the charging module 312 according to the input voltage of the power adapter 40: if the input voltage of the power adapter 40 is within any one of the voltage ranges, the output power of the charging module 312 is adjusted to be the preset power corresponding to the voltage range. For example, if the input voltage of the power adapter 40 output by the sampling module 314 is within the voltage range of [ V1, V2), the processing module 316 may adjust the output power of the charging module 312 to P1; if the input voltage of the power adapter 40 output by the sampling module 314 is within the voltage range V2, V3), the processing module 316 may adjust the output power of the charging module 312 to P2.

In some specific embodiments, the processing module 316 has stored therein a first voltage range, a second voltage range, and a third voltage range, wherein the third voltage range is [80v,140 v), the second voltage range is [140v,200 v), and the first voltage range is [200v,267 v). The third preset power corresponding to the third voltage range is 40W (watts), the second preset power corresponding to the second voltage range is 60W, and the first preset power corresponding to the first voltage range is 100W. That is, the minimum value of the first voltage range is greater than the maximum value of the second voltage range, and the first preset power is greater than the second preset power; the minimum value of the second voltage range is larger than the maximum value of the third voltage range, and the second preset power is larger than the third preset power. At this time, if the sampling module 314 detects that the input voltage of the power adapter 40 is 220V, the processing module 316 adjusts the output power of the charging module 312 to be 100W; if the sampling module 314 detects that the input voltage of the power adapter 40 is 160V, the processing module 316 adjusts the output power of the charging module 312 to be 60W; if the sampling module 314 detects that the input voltage of the power adapter 40 is 110V, the processing module 316 adjusts the output power of the charging module 312 to 40W.

As another implementation manner, the processing module 316 may also store a correspondence relationship between the input voltage and the power. The correspondence is presented in the form of a function or graph. In this correspondence, the larger the input voltage is, the larger the power corresponding to the input voltage is. In this case, the processing module 316 may specifically be configured to adjust the output power of the charging module 312 according to the input voltage of the power adapter 40: according to the input voltage of the power adapter 40, the corresponding power is obtained from the correspondence between the input voltage and the power as the target power, and the output power of the charging module 312 is adjusted to the target power. As such, the greater the input voltage of the power adapter 40, the greater the output power of the charging module 312, i.e., the greater the output power of the power adapter 40. When the input voltage of the power adapter 40 is smaller, the output power of the charging module 312 is smaller, that is, the output power of the power adapter 40 is also smaller.

It should be noted that, in the above embodiment, the connection manner and the operation process of the charging circuit 310 provided in the embodiment of the present application are described by introducing the power adapter 40 and the energy storage module 320 of the electronic device 30 for easy understanding. In fact, the charging circuit 310 provided by the embodiment of the present application does not include the power adapter 40 and the energy storage module 320. That is, the power adapter 40 and the energy storage module 320 are present as environmental elements with respect to the charging circuit 310 provided by the embodiment of the present application, and should not be construed as limiting the charging circuit 310 provided by the embodiment of the present application.

The charging circuit 310 provided in the embodiment of the present application is further expanded and described in detail below in conjunction with the power adapter 40.

In some embodiments, as shown in fig. 9 and 10, the power adapter 40 includes a rectifying module 410, a transforming module 420, and a communication module 430. The input end of the rectifying module 410 is the input end of the power adapter 40, and is used for being connected with the mains supply, so that the rectifying module 410 can rectify the alternating current output by the mains supply and output direct current. The transforming module 420 is connected between the output end of the rectifying module 410 and the input end of the communication module 430, and is configured to transform the direct current output by the rectifying module 410 and output the transformed direct current to the communication module 430. The output of the communication module 430 is the output of the power adapter 40. The output terminals of the communication module 430 include a voltage output terminal and a communication terminal. In the embodiment shown in fig. 9 and 10, the input of the illustrated rectifier module 410 includes a port pa1 and a port pa2. When the power adapter 40 is connected to the utility, one of the port pa1 and the port pa2 is connected to the live line L, and the other of the port pa1 and the port pa2 is connected to the neutral line N. That is, the port pa1 of the rectifying module 410 is the port p1 of the power adapter 40, and the port pa2 of the rectifying module 410 is the port p2 of the power adapter 40. The voltage output of the illustrated communication module 430 includes a power port VBUS and a ground port G1, and the communication terminal of the illustrated communication module 430 includes an in-phase data terminal d+ and an anti-phase data terminal D-. When the input terminal of the power adapter 40 is connected to the mains and the output terminal of the power adapter 40 is connected to the electronic device 30, the power port VBUS and the ground port G1 of the communication module 430 may output power to the electronic device 30, and the in-phase data terminal d+ and the anti-phase data terminal D-of the communication module 430 may communicate with the electronic device 30. In the power adapter 40, the communication end of the communication module 430 is the communication end of the power adapter 40. The communication terminal of the power adapter 40 is connected to the input terminal of the power adapter 40. That is, one of the in-phase data terminal d+ and the opposite-phase data terminal D-of the communication module 430 is connected to one of the ports pa1 and pa2 of the rectification module 410. In the embodiment shown in fig. 9, the in-phase data terminal d+ of the communication module 430 is connected to the port pa1 of the rectifying module 410; in the embodiment shown in fig. 10, the inverted data terminal D-of the communication module 430 is shown connected to the port pa1 of the rectifying module 410.

The input d of the sampling module 314 is adapted to be connected to the communication terminal of the power adapter 40, and thus to the input of the power adapter 40 via the communication terminal of the power adapter 40. That is, as shown in fig. 9, if the in-phase data terminal d+ of the communication module 430 is connected to one of the ports pa1 and pa2 of the rectifying module 410, the input terminal D of the sampling module 314 is connected to the in-phase data terminal d+ of the communication module 430 when the electronic device 30 is connected to the power adapter 40. In this way, the input D of the sampling module 314 can be connected to the input of the power adapter 40 through the in-phase data d+ of the communication module 430, so that the sampling module 314 can detect the input voltage of the power adapter 40. As shown in fig. 10, if the inverted data terminal D-of the communication module 430 is connected to one of the ports pa1 and pa2 of the rectifying module 410, the input terminal D of the sampling module 314 is connected to the inverted data terminal D-of the communication module 430 when the electronic device 30 is connected to the power adapter 40. In this way, the input D of the sampling module 314 can be connected to the input of the power adapter 40 through the inverted data D of the communication module 430, so that the sampling module 314 can detect the input voltage of the power adapter 40.

In some embodiments, as previously described, the power adapter 40 has a communication end. When the input terminal of the power adapter 40 is connected to the mains and the output terminal of the power adapter 40 is connected to the electronic device 30, the power adapter 40 may communicate with the processing module 316 of the charging circuit 310 of the electronic device 30 through the communication terminal. In this embodiment, as shown in fig. 11, the processing module 316 also has a communication end. The communication terminal of the processing module 316 is configured to be connected to the communication terminal of the power adapter 40, so that a communication signal can be transmitted between the communication terminal of the processing module 316 and the communication terminal of the power adapter 40, so that the power adapter 40 can communicate with the processing module 316 of the charging circuit 310. The charging circuit 310 may also include a notch module 318.

The notch module 318 is a band reject filter circuit. The notch module 318 may have an operating frequency range. When the notch module 318 operates, if the frequency of a certain electrical signal is within the operating frequency range of the notch module 318, the electrical signal cannot pass through the notch module 318. That is, the notch module 318 is configured to block the passage of electrical signals in a certain frequency range. The notch module 318 has a first end and a second end. The first end of the notch module 318 is configured to be connected to a communication terminal of the power adapter 40, and the second end of the notch module 318 is connected to a communication terminal of the processing module 316. In an embodiment of the present application, the operating frequency range of the notch module 318 should satisfy the following conditions: the frequency of the mains is within the operating frequency range of the notch module 318, and the frequency of the communication signal when the power adapter 40 communicates with the processing module 316 is not within the operating frequency range of the notch module 318. For example, the mains supply may be 40HZ (hertz), 50HZ, 60HZ, 70HZ, 80HZ, 90HZ or 100HZ as alternating current. Here, the frequencies of the mains supply in different regions may be within the operating frequency range of the notch module 318, so that the mains supply signal in any region cannot pass through the notch module 318. The frequency of the communication signal when the power adapter 40 communicates with the processing module 316 may be 12MHZ or 48MHZ. In this case, the operating frequency range of the notch module 318 may be 40HZ to 100HZ. In this way, under the action of the notch module 318, a communication signal can be transmitted between the communication end of the power adapter 40 and the communication end of the processing module 316, and an electric signal of the mains supply on the communication end of the power adapter 40 cannot be input to the communication end of the processing module 316 through the notch module 318, which can ensure a communication function between the power adapter 40 and the charging circuit 310.

Specifically, as still shown in fig. 11, the power adapter 40 and the processing module 316 of the charging circuit 310 generally communicate by means of differential communication, that is, the communication signals transmitted between the communication terminal of the processing module 316 and the communication terminal of the power adapter 40 are differential signals. In this case, the communication terminals of the power adapter 40 include an in-phase data terminal D+ and an anti-phase data terminal D-. The communication end of the processing module 316 includes a port j1 and a port j2. Wherein, the port j1 of the processing module 316 is used for being connected with the in-phase data terminal d+ of the power adapter 40; the port j2 of the processing module 316 is for connection with the inverted data terminal D-of the power adapter 40. Based on this, a first end of notch module 318 may include port h1 and port h2, and a second end of notch module 318 may include port i1 and port i2. The port h1 is used for being connected to the in-phase data terminal d+ of the power adapter 40, and the port i1 is connected to the port j1 of the processing module 316. In this manner, signals between port j1 of the processing module 316 and the in-phase data terminal d+ of the power adapter 40 may be transmitted through ports h1 and i1 of the notch module 318. Port h2 is for connection to the inverting data terminal D-of the power adapter 40 and port i2 is connected to port j2 of the processing module 316. In this manner, signals between port j2 of the processing module 316 and the inverted data terminal D-of the power adapter 40 may be transmitted through ports h2 and i2 of the notch module 318.

Based on the connection structure shown in fig. 11, the module structure of the charging circuit 310 may be as shown in fig. 12. In the embodiment shown in fig. 12, the processing module 316 may include a processing unit 3162 and a communication unit 3164 connected. The input end of the processing unit 3162 is the input end f of the processing module 316, and is configured to be connected to the output end e of the sampling module 314, so as to receive the input voltage of the power adapter 40 detected by the sampling module 314. The output terminal of the processing unit 3162 is the output terminal g of the processing module 316, and is used for outputting a control signal to control the operation of the charging module 312. The communication end of the communication unit 3164 is a communication end of the processing module 316, and is configured to be connected to the second end of the notch module 318, so as to transmit a communication signal with the power adapter 40 through the notch module 318.

Fig. 13 is a circuit configuration diagram of a charging circuit 310 according to an embodiment of the present application. As shown in fig. 13, in some embodiments, sampling module 314 includes a filtering unit 3142 and a sampling unit 3144.

The filter unit 3142 is a band-pass filter circuit. The filtering unit 3142 may have an operating frequency range. When the filtering unit 3142 is operated, if the frequency of a certain electric signal is within the operating frequency range of the filtering unit 3142, the electric signal may pass through the filtering unit 3142. That is, the filtering unit 3142 is used to pass an electric signal of a certain frequency range. The filter unit 3142 has an input terminal and an output terminal. An input terminal of the filtering unit 3142 is used for connection with a communication terminal of the power adapter 40. That is, when the input terminal of the power adapter 40 is connected to the utility power and the output terminal of the power adapter 40 is connected to the electronic device 30, the input terminal of the filtering unit 3142 is connected to the communication terminal of the power adapter 40 to be connected to the input terminal of the power adapter 40 through the communication terminal of the power adapter 40. An output terminal of the filtering unit 3142 is connected to an input terminal of the sampling unit 3144, so that the sampling unit 3144 can detect an output voltage of the filtering unit 3142. Here, the sampling unit 3144 may be operative to: the output voltage of the filtering unit 3142 is detected, the input voltage of the power adapter 40 is obtained from the correspondence relationship between the output voltage of the filtering unit 3142 and the input voltage of the power adapter 40, and the input voltage of the power adapter 40 is output to the processing module 316. The output terminal of the sampling unit 3144 is the output terminal e of the sampling module 314, and is used for being connected to the input terminal f of the processing module 316, so as to output the input voltage of the power adapter 40 to the processing module 316.

In the embodiment of the present application, the operating frequency range of the filtering unit 3142 should satisfy the following conditions: the frequency of the mains is within the operating frequency range of the filtering unit 3142, and the frequency of the communication signal when the power adapter 40 communicates with the processing module 316 is not within the operating frequency range of the filtering unit 3142. That is, the operating frequency range of the filtering unit 3142 and the operating frequency range of the notch module 318 may be the same frequency range. Here, the frequencies of the electric power in different regions may be in the operating frequency range of the filtering unit 3142, so that the electric power signal of the electric power in any region may pass through the filtering unit 3142. As such, the communication signal cannot be transmitted to the input of the sampling unit 3144 through the filtering unit 3142 under the action of the filtering unit 3142. That is, the voltage received by the sampling unit 3144 is related to only the mains voltage, irrespective of the voltage of the communication signal. This may ensure the accuracy of the sampling unit 3144 to detect the mains voltage.

The sampling unit 3144 may pre-store therein a correspondence relationship between the output voltage of the filtering unit 3142 and the input voltage of the power adapter 40. The correspondence may be stored in the form of a table or may be stored in the form of a function or a graph, which is not limited herein. In this way, when the output voltage of the filtering unit 3142 is detected at the input end of the sampling unit 3144, the input voltage of the power adapter 40 can be obtained in a corresponding relationship according to the output voltage of the filtering unit 3142. In some particular embodiments, the sampling unit 3144 may include an analog-to-digital converter (analog to digital converter, ADC). In this case, the output voltage of the filtering unit 3142 detected by the sampling unit 3144 is an analog signal, and the input voltage of the power adapter 40 output by the sampling unit 3144 to the processing module 316 is a digital signal.

It will be appreciated that the above-described electrical units (e.g., the sampling unit 3144, the processing unit 3162, the communication unit 3164, etc.) and electrical modules (e.g., the sampling module 314, the processing module 316, etc.) are obtained by dividing the electronic devices in the charging circuit 310 according to different functions. In fact, in the charging circuit 310, multiple electronic devices in one electrical module or unit are not necessarily packaged together. For example, in some embodiments, the sampling unit 3144 of the sampling module 314 may also be integrated into the processing module 316. This is a reasonable transformation that can be made by a person skilled in the art according to the technical solution of the embodiments of the present application, and should also be understood to be within the scope of the embodiments of the present application.

In some specific embodiments, as shown in fig. 13, the filtering unit 3142 includes a first capacitor C1 and a first resistor R1. The first plate of the first capacitor C1 is an input terminal of the filtering unit 3142, and is used for being connected to a communication terminal of the power adapter 40. The second plate of the first capacitor C1 is an output terminal of the filtering unit 3142, and is connected to the first terminal of the first resistor R1 and the input terminal of the sampling unit 3144. The second end of the first resistor R1 is connected to the first ground GND 1. The first ground GND1 here refers to a ground on the electronic device 30 side, that is, a ground on the weak current side when the power adapter 40 is connected to the electronic device 30.

The notch module 318 includes a first notch unit 3182 and a second notch unit 3184. First notch 3182 is connected between port h1 and port i1 of the notch block. The first notch unit 3182 includes a first inductance L1 and a third capacitance C3. The first end of the first inductor L1 is connected to the port h1, and the second end of the first inductor L1 is connected to the port i 1. The first electrode plate of the third capacitor C3 is connected to the port h1, and the second electrode plate of the third capacitor C3 is connected to the port i 1. The second notch 3184 is connected between the port h2 and the port i2 of the notch module 318. The second notch unit 3184 includes a second inductance L2 and a fourth capacitance C4. The first end of the second inductor L2 is connected to the port h2, and the second end of the second inductor L2 is connected to the port i 2. The first electrode of the fourth capacitor C4 is connected to the port h2, and the second electrode of the fourth capacitor C4 is connected to the port i 2. In this embodiment, the operating frequency range of the notch module 318 may be adjusted by adjusting parameters of the first inductor L1, the second inductor L2, the third capacitor C3, and the fourth capacitor C4.

The embodiment of the present application further provides an electronic device 30, which includes an energy storage module 320 and the charging circuit 310 in any one of the above embodiments.

The embodiment of the application also provides a power adapter 40 for charging the energy storage module 320 of the electronic device 30. The electronic device 30 here comprises a charging circuit 310 as in any of the embodiments described above. Fig. 14 is a schematic diagram of a connection structure between a power adapter 40 and an electronic device 30 according to another embodiment of the present application. The power adapter 40 has an input, a voltage output, and a communication terminal. As shown in fig. 14, the input end of the rectifying module 410 is the input end of the power adapter 40, and includes a port pa1 and a port pa2. When the power adapter 40 is connected to the utility, one of the port pa1 and the port pa2 is connected to the live line L, and the other of the port pa1 and the port pa2 is connected to the neutral line N. The voltage output terminal of the communication module 430 is the voltage output terminal of the power adapter 40, and includes a power port VBUS and a ground port G1. When the power adapter 40 is connected to the electronic device 30, the power supply port VBUS and the ground port G1 may output power to the electronic device 30, and the ground port G1 is used to connect with the first ground GND1 in the electronic device 30. The communication terminals of the communication module 430 are communication terminals of the power adapter 40, including an in-phase data terminal d+ and an opposite-phase data terminal D-. When the power adapter 40 is connected to the electronic device 30, the in-phase data terminal d+ and the anti-phase data terminal D-may communicate differentially with the electronic device 30. Here, the input terminal (one of the ports pa1 and pa 2) of the power adapter 40 is also connected to the communication terminal (one of the in-phase data terminal d+ and the opposite-phase data terminal D ") of the power adapter 40, so that when the power adapter 40 is connected to the electronic device 30, the input terminal of the sampling module 314 may be connected to the input terminal of the power adapter 40 through the communication terminal of the power adapter 40 to detect the input voltage of the power adapter 40. When the power adapter 40 is connected to the electronic device 30, the voltage output terminal of the power adapter 40 is connected to the input terminal of the charging module 312, so that the voltage output terminal of the power adapter 40 can charge the energy storage unit through the charging module 312.

In some embodiments, as shown in fig. 14, the power adapter 40 further includes a second capacitor C2, a second resistor R2, and a third resistor R3. The first plate of the second capacitor C2 is connected to the input of the power adapter 40. That is, the first plate of the second capacitor C2 is used for connection to one of the live line L and the neutral line N. The second polar plate of the second capacitor C2 is connected to the first end of the second resistor R2. The second end of the second resistor R2 is connected to the first end of the third resistor R3 and the communication end of the power adapter 40, and is used for being connected to the input end of the sampling module 314. That is, the second end of the second resistor R2, the first end of the third resistor R3, and the input end of the sampling module 314 are all connected to one of the in-phase data terminal d+ and the anti-phase data terminal D-. The second end of the third resistor R3 is connected to the first ground GND 1.

The circuit configuration of the power adapter 40 according to the embodiment of the present application will be specifically described with reference to the drawings.

Fig. 15 is a schematic diagram of a connection structure between a power adapter 40 and an electronic device 30 according to another embodiment of the present application. As shown in fig. 15, the power adapter 40 includes a suppression module 440, a rectification module 410, a transformation module 420, and a communication module 430.

The suppression module 440 is used for suppressing the differential mode signal and the common mode signal in the mains. The suppression module 440 has a first input and a second input. One of the first and second inputs of the suppression module 440 is for connection to the hot line L and the other is for connection to the neutral line N. Thus, the rejection module 440 can input the mains supply and filter the differential mode signal and the common mode signal in the mains supply to output the alternating current after filtering the differential mode signal and the common mode signal. In the embodiment shown in fig. 16, a first input of the suppression module 440 is connected to the hot line L via a first fuse FU1 and a second input of the suppression module 440 is connected to the neutral line N via a second fuse FU 2. The suppression module 440 also has a first output and a second output.

The rectifying module 410 has a first input and a second input. Wherein, the first input end of the rectifying module 410 is connected to the first output end of the suppressing module 440, and the second input end of the rectifying module 410 is connected to the second output end of the suppressing module 440. The rectifying module 410 is configured to rectify the alternating current with the differential mode signal and the common mode signal filtered to obtain direct current. The rectifying module 410 further has a first output terminal and a second output terminal, and the second output terminal of the rectifying module 410 is connected to the second ground GND 2. The second ground GND2 here refers to the ground on the strong current side when the power adapter 40 is connected to the commercial power.

The transformation module 420 has a first input and a second input. A first input of the transformation module 420 is connected to a first output of the rectification module 410, and a second input of the transformation module 420 is connected to a second output of the rectification module 410, i.e. to the second ground GND 2. The voltage transformation module 420 is used for transforming the direct current to output a direct current with a lower voltage. The transformation module 420 also has a first output and a second output. A first output of the transformation module 420 is connected to a first input of the communication module 430, and a second output of the transformation module 420 is connected to a second input of the communication module 430 to supply power to the communication module 430. The communication module 430 has a voltage output terminal and a communication terminal, which will not be described again.

Specifically, as shown in fig. 15, the suppression module 440 includes a fourth resistor R4, a fifth capacitor C5, a third inductor L3, and a fourth inductor L4. The first end of the fourth resistor R4 and the first polar plate of the fifth capacitor C5 are both used for being connected with the live wire L, and the second end of the fourth resistor R4 and the second polar plate of the fifth capacitor C5 are both used for being connected with the zero line N so as to filter differential mode signals. The first end of the third inductor L3 is connected to the live wire L, and the second end of the third inductor L3 is connected to the first input end of the rectifying module 410. The first end of the fourth inductor L4 is connected to the zero line N, and the second end of the fourth inductor L4 is connected to the second input end of the rectifying module 410. The third inductor L3 and the fourth inductor L4 are wound on the same closed core to filter out the common mode signal.

The rectifying module 410 includes a first diode D1, a second diode D2, a third diode D3, and a fourth diode D4. The first diode D1, the second diode D2, the third diode D3, and the fourth diode D4 constitute a full bridge rectifier circuit. The cathode of the first diode D1 and the anode of the second diode D2 are connected to the second end of the third inductor L3, and the cathode of the third diode D3 and the anode of the fourth diode D4 are connected to the second end of the fourth inductor L4. The cathode of the second diode D2 and the cathode of the fourth diode D4 are connected to the first input terminal of the transformation module 420, and the anode of the first diode D1 and the anode of the third diode D3 are connected to the second ground GND 2.

The transformation module 420 includes a sixth capacitor C6, a seventh capacitor C7, a fifth resistor R5, a fifth diode D5, a first winding L5, a transistor Q1, a sixth resistor R6, a seventh resistor R7, a tenth capacitor C10, a second winding L6, a sixth diode D6, an eighth capacitor C8, a ninth capacitor C9, and a processor 422. The sixth capacitor C6 is connected between the first output terminal of the rectifying module 410 and the second ground GND 2. The first polar plate of the seventh capacitor C7 is connected with the first end of the first winding L5, the second polar plate of the seventh capacitor C7 is connected with the cathode of the fifth diode D5, and the anode of the fifth diode D5 is connected with the second end of the first winding L5. The fifth resistor R5 is connected between the plates of the seventh capacitor C7. The first terminal of the transistor Q1 is connected to the second terminal of the fifth winding, and the second terminal of the transistor Q1 is connected to the second ground GND2 through the seventh resistor R7. The control terminal of the transistor Q1 is connected to the processor 422 through a sixth resistor R6. The tenth capacitor C10 is a parasitic capacitor of the transistor Q1, and is connected between the first terminal and the second terminal of the transistor Q1. The first winding L5 and the second winding L6 are wound on the same closed core. The first end of the second winding L6 is connected to the anode of a sixth diode D6, and the cathode of the sixth diode D6 is connected to the first input of the communication module 430. A second end of the second winding L6 is connected to a second input of the communication module 430. An eighth capacitor C8 is connected between the anode and the cathode of the sixth diode D6, and a ninth capacitor C9 is connected between the cathode of the sixth diode D6 and the second end of the second winding L6.

In the embodiment shown in fig. 15, the first plate of the second capacitor C2 is connected to the first end of the first fuse FU1, and the second plate of the second capacitor C2 is connected to the first end of the second resistor R2. The second end of the second resistor R2 is connected to the first end of the third resistor R3 and the in-phase data end, and the second end of the third resistor R3 is connected to the first ground GND 1.

Fig. 16 is a schematic diagram of a connection structure between a power adapter 40 and an electronic device 30 according to an embodiment of the present application, and further illustrates a notch module 318 in a charging circuit 310 of the electronic device 30 connected to the power adapter 40, which is not described herein. In the embodiment shown in fig. 16, the power adapter 40 further includes a capacitor CY1 and a capacitor CY2. The capacitor CY1 and the capacitor CY2 are connected in series and connected between the first ground GND1 and the second ground GND2, for eliminating the common mode noise voltage generated during the operation of the processor 422.

In the embodiment of the present application, the corresponding relationship between the output voltage of the filtering unit 3142 and the input voltage of the power adapter 40 may be adjusted by adjusting the capacitance value of the first capacitor C1, the capacitance value of the second capacitor C2, the resistance value of the first resistor R1, the resistance value of the second resistor R2, and the resistance value of the third resistor R3. In a specific embodiment, when the capacitance of the second capacitor C2 is 10pF (picofarad), the resistance of the second resistor R2 is 20mΩ (megaohm), the resistance of the third resistor R3 is 10mΩ, the capacitance of the first capacitor C1 is 100pF, and the resistance of the first resistor R1 is 10mΩ, if the input voltage of the power adapter 40 is 267V, the output voltage of the filtering unit 3142 is 2.2V; if the input voltage of the power adapter 40 is 200V, the output voltage of the filtering unit 3142 is 1.8V; if the input voltage of the power adapter 40 is 150V, the output voltage of the filtering unit 3142 is 1.3V; if the input voltage of the power adapter 40 is 80V, the output voltage of the filtering unit 3142 is 0.8V. In this case, the correspondence relationship between the output voltage of the filter unit 3142 and the input voltage of the power adapter 40 may be as shown in fig. 17.

The embodiment of the present application also provides a charging system including the power adapter 40 in any one of the embodiments described above and the electronic device 30 in any one of the embodiments described above. In operation of the charging system, the sampling module 314 may detect the input voltage of the power adapter 40. The processing module 316 may receive the input voltage of the power adapter 40 output by the sampling module 314, and adjust the output power of the charging module 312 to the energy storage module 320 according to the input voltage of the power adapter 40. Thus, when the input voltage of the power adapter 40 is higher, the processing module 316 can control the output power of the charging module 312 to the energy storage module 320 to be larger, so that the power adapter 40 outputs with larger power, and the hardware capability of the power adapter 40 is fully exerted, so as to ensure the charging speed. When the input voltage of the power adapter 40 is low, the processing module 316 may control the output power of the charging module 312 to the energy storage module 320 to be low, so that the power adapter 40 outputs low power. When the power adapter 40 outputs smaller power, the current in the power adapter 40 is smaller, and the heat is less, so that the over-temperature protection mechanism of the power adapter 40 can be prevented from being triggered, and the power adapter 40 can continuously charge the electronic device 30.

The above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and are intended to be included in the scope of the present application.

Claims

1. A charging circuit disposed in an electronic device having an energy storage module, the charging circuit comprising: the device comprises a charging module, a sampling module and a processing module;

The output end of the charging module is used for being connected with the energy storage module; the output end of the sampling module is connected with the input end of the processing module, and the output end of the processing module is connected with the control end of the charging module;

When the electronic equipment is connected with the power adapter through a charging wire, the input end of the charging module is connected with the voltage output end of the power adapter, and the input end of the sampling module is connected with the input end of the power adapter through the communication end of the power adapter so as to detect the input voltage of the power adapter; the processing module is used for: receiving the input voltage of the power adapter output by the sampling module, and adjusting the output power of the charging module according to the input voltage of the power adapter so that the power adapter continuously outputs electric energy to the charging module;

Wherein, the sampling module includes: a filtering unit and a sampling unit; the input end of the filtering unit is used for being connected with the communication end of the power adapter, the output end of the filtering unit is connected with the input end of the sampling unit, and the sampling unit is used for: and detecting the output voltage of the filtering unit, obtaining the input voltage of the power adapter according to the corresponding relation between the output voltage of the filtering unit and the input voltage of the power adapter, and outputting the input voltage of the power adapter to the processing module.

2. The charging circuit of claim 1, wherein the filtering unit comprises: a first capacitor and a first resistor;

the first polar plate of the first capacitor is used for being connected with the communication end of the power adapter, the second polar plate of the first capacitor is connected with the first end of the first resistor and the input end of the sampling unit, and the second end of the first resistor is connected with the first ground wire.

3. The charging circuit of claim 1, wherein the charging circuit further comprises a notch module;

The first end of the notch module is used for being connected with the communication end of the power adapter, and the second end of the notch module is connected with the communication end of the processing module.

4. A charging circuit as claimed in any one of claims 1 to 3, wherein the processing module stores a plurality of voltage ranges and a plurality of preset powers, the plurality of voltage ranges and the plurality of preset powers being in one-to-one correspondence;

The processing module is used for: and receiving the input voltage of the power adapter output by the sampling module, and if the input voltage of the power adapter is in any one of the voltage ranges, adjusting the output power of the charging module to be the preset power corresponding to the one voltage range.

5. The charging circuit of claim 4, wherein the plurality of voltage ranges comprises a first voltage range and a second voltage range, the plurality of preset powers comprises a first preset power and a second preset power, the first voltage range corresponds to the first preset power, and the second voltage range corresponds to the second preset power;

The minimum value of the first voltage range is larger than the maximum value of the second voltage range, and the first preset power is larger than the second preset power.

6. An electronic device comprising an energy storage module and a charging circuit as claimed in any one of claims 1 to 5.

7. A power adapter for charging an energy storage module of an electronic device, characterized in that the electronic device comprises a charging circuit according to any one of claims 1 to 5;

The power adapter is provided with an input end, a voltage output end and a communication end, wherein the input end of the power adapter is used for being connected with mains supply, and the input end of the power adapter is connected with the communication end of the power adapter;

when the power adapter is connected with the electronic equipment, the communication end of the power adapter is connected with the input end of the sampling module, and the voltage output end of the power adapter is connected with the input end of the charging module;

Wherein the power adapter further comprises: a second capacitor, a second resistor and a third resistor;

The first polar plate of the second capacitor is connected with the input end of the power adapter, the second polar plate of the second capacitor is connected with the first end of the second resistor, the second end of the second resistor is connected with the first end of the third resistor and the communication end of the power adapter, and the second end of the third resistor is connected with the first ground wire.

8. The power adapter of claim 7 wherein the utility power includes a hot wire and a neutral wire, the first plate of the second capacitor being adapted to be connected to one of the hot wire and the neutral wire.

9. The power adapter of claim 7 wherein the communication terminals of the power adapter include an in-phase data terminal and an anti-phase data terminal, one of the in-phase data terminal and the anti-phase data terminal being coupled to the input terminal of the sampling module when the power adapter is coupled to the electronic device.