WO2022234955A1

WO2022234955A1 - Wireless charging noise processing method and electronic device supporting same

Info

Publication number: WO2022234955A1
Application number: PCT/KR2022/004506
Authority: WO
Inventors: 정명균
Original assignee: 삼성전자 주식회사
Priority date: 2021-05-06
Filing date: 2022-03-30
Publication date: 2022-11-10
Also published as: KR20220151462A

Abstract

Disclosed is an electronic device comprising a wireless charging circuit including a rectifier for converting AC power into DC power, a processor electrically connected to the wireless charging circuit, and a noise detection circuit connected between the wireless charging circuit and the processor, wherein the noise detection circuit includes: a comparator having an output terminal connected to a GPIO port of the processor; a first resistance element connected to an output terminal of the rectifier and configured to apply a portion of an output voltage of the rectifier to a first input terminal of the comparator; a second resistance element connected to the output terminal of the rectifier and configured to apply the other portion of the output voltage of the rectifier to a second input terminal of the comparator; and a capacitor connected between the second resistance element and the second input terminal. In addition, various embodiments identified through the present document are possible.

Description

Wireless charging noise processing method and electronic device supporting the same

Various embodiments of the present invention relate to a technology for processing wireless charging noise.

Recently, as electronic devices such as smart phones include high-performance electronic components and have various functions, research on fast charging of batteries and efficient power control has been actively conducted.

Meanwhile, recently released electronic devices may provide a wireless charging function through a wireless charging circuit. An electronic device including such a wireless charging circuit may charge a battery through a wireless charging pad without a wired connection.

During wireless charging, an electronic device that receives power and an external electronic device that transmits power use in-band communication (in-band communication) using a frequency of a band that is the same as or adjacent to a frequency used for wireless charging through a coil included in each device. -band communication) can be performed. For example, the electronic device and the external electronic device may share data related to wireless charging through in-band communication.

However, when performing in-band communication, the charging voltage may change, and vibration (vibration) of the capacitor (eg, multi-layer ceramic capacitor (MLCC)) connected to the wireless charging circuit occurs according to the change in the charging voltage. By doing so, noise may be generated.

To reduce such noise, a special material capacitor (eg, tantal capacitor) can be used, but in the case of a special material capacitor, a problem of increasing cost and burning under certain conditions such as heat generation may occur.

Various embodiments of the present disclosure may provide a processing method capable of detecting and reducing wireless charging noise without using a high-cost, special material capacitor, and an electronic device supporting the same.

In addition, various embodiments of the present disclosure may provide a method for reducing wireless charging noise in consideration of an environment in which an electronic device is used and an electronic device supporting the same.

An electronic device according to various embodiments of the present disclosure includes a wireless charging circuit including a rectifier for converting AC power into DC power, a processor electrically connected to the wireless charging circuit, and a wireless charging circuit connected between the wireless charging circuit and the processor a comparator having an output terminal connected to a GPIO port of the processor, and a comparator connected to an output terminal of the rectifier, wherein the noise detection circuit is configured to apply a portion of an output voltage of the rectifier to a first input terminal of the comparator A first resistor element for It may include a capacitor connected to the.

In addition, the electronic device according to various embodiments of the present disclosure includes a wireless charging circuit including a rectifier for converting AC power into DC power, a processor electrically connected to the wireless charging circuit, and between the wireless charging circuit and the processor and a noise sensing circuit connected to , wherein the noise sensing circuit is connected between the output terminal of the rectifier and the ADC port of the processor, and may include a capacitor.

In addition, the method of processing wireless charging noise according to various embodiments of the present disclosure includes an operation of determining whether a wireless charging state is in the wireless charging state, an operation of detecting noise generated in the wireless charging state, and an operation of detecting the noise generated in the wireless charging state, in response to the detection of the noise, the noise an operation of determining whether is noise according to in-band communication, an operation of determining whether an external environment of the electronic device satisfies a specified condition in response to determining that the noise is noise according to the in-band communication, and the electronic device In response to determining that the external environment of the user satisfies the specified condition, the operation may include reducing the noise.

According to various embodiments of the present disclosure, by detecting and reducing wireless charging noise without using a high-cost, special material capacitor, it is possible to reduce the cost of manufacturing an electronic device.

Also, according to various embodiments of the present disclosure, by reducing wireless charging noise in consideration of the environment in which the electronic device is used, charging efficiency may be maintained, and thus usability of the electronic device may be increased.

In addition, various effects directly or indirectly identified through this document may be provided.

1 is a block diagram of an electronic device in a network environment according to various embodiments of the present disclosure;

2 is a diagram for explaining the configuration of an electronic device related to wireless charging noise processing according to an embodiment of the present invention.

3 is a diagram for explaining wireless charging noise generated during in-band communication according to an embodiment of the present invention.

4 is another diagram for explaining wireless charging noise generated during in-band communication according to an embodiment of the present invention.

5 is a diagram for explaining a circuit for detecting wireless charging noise according to an embodiment of the present invention.

6 is a diagram for explaining an output voltage of a circuit for detecting wireless charging noise according to an embodiment of the present invention.

7 is another diagram for explaining an output voltage of a circuit for detecting wireless charging noise according to an embodiment of the present invention.

8 is a diagram for explaining another circuit for detecting wireless charging noise according to an embodiment of the present invention.

9 is a diagram for explaining an output voltage of another circuit for detecting wireless charging noise according to an embodiment of the present invention.

10 is a diagram for explaining another circuit for detecting wireless charging noise according to an embodiment of the present invention.

11 is a view for explaining a method of processing wireless charging noise according to an embodiment of the present invention.

12 is a view for explaining a method of reducing wireless charging noise according to an embodiment of the present invention.

13 is a diagram for explaining a method of adjusting an in-band communication control circuit according to an embodiment of the present invention.

In connection with the description of the drawings, the same or similar reference numerals may be used for the same or similar components.

Hereinafter, various embodiments of the present invention will be described with reference to the accompanying drawings. For convenience of description, the size of the components shown in the drawings may be exaggerated or reduced, and the present invention is not necessarily limited to the illustrated bar.

1 is a block diagram of an electronic device 101 in a network environment 100, according to various embodiments. Referring to FIG. 1 , in a network environment 100 , the electronic device 101 communicates with the electronic device 102 through a first network 198 (eg, a short-range wireless communication network) or a second network 199 . It may communicate with at least one of the electronic device 104 and the server 108 through (eg, a long-distance wireless communication network). According to an embodiment, the electronic device 101 may communicate with the electronic device 104 through the server 108 . According to an embodiment, the electronic device 101 includes a processor 120 , a memory 130 , an input module 150 , a sound output module 155 , a display module 160 , an audio module 170 , and a sensor module ( 176), interface 177, connection terminal 178, haptic module 179, camera module 180, power management module 188, battery 189, communication module 190, subscriber identification module 196 , or an antenna module 197 . In some embodiments, at least one of these components (eg, the connection terminal 178 ) may be omitted or one or more other components may be added to the electronic device 101 . In some embodiments, some of these components (eg, sensor module 176 , camera module 180 , or antenna module 197 ) are integrated into one component (eg, display module 160 ). can be

The processor 120, for example, executes software (eg, a program 140) to execute at least one other component (eg, a hardware or software component) of the electronic device 101 connected to the processor 120. It can control and perform various data processing or operations. According to one embodiment, as at least part of data processing or operation, the processor 120 converts commands or data received from other components (eg, the sensor module 176 or the communication module 190 ) to the volatile memory 132 . may be stored in , process commands or data stored in the volatile memory 132 , and store the result data in the non-volatile memory 134 . According to an embodiment, the processor 120 is a main processor 121 (eg, a central processing unit or an application processor) or a secondary processor 123 (eg, a graphic processing unit, a neural network processing unit) a neural processing unit (NPU), an image signal processor, a sensor hub processor, or a communication processor). For example, when the electronic device 101 includes the main processor 121 and the sub-processor 123 , the sub-processor 123 uses less power than the main processor 121 or is set to be specialized for a specified function. can The auxiliary processor 123 may be implemented separately from or as a part of the main processor 121 .

The secondary processor 123 may, for example, act on behalf of the main processor 121 while the main processor 121 is in an inactive (eg, sleep) state, or when the main processor 121 is active (eg, executing an application). ), together with the main processor 121, at least one of the components of the electronic device 101 (eg, the display module 160, the sensor module 176, or the communication module 190) It is possible to control at least some of the related functions or states. According to an embodiment, the coprocessor 123 (eg, an image signal processor or a communication processor) may be implemented as part of another functionally related component (eg, the camera module 180 or the communication module 190). have. According to an embodiment, the auxiliary processor 123 (eg, a neural network processing unit) may include a hardware structure specialized for processing an artificial intelligence model. Artificial intelligence models can be created through machine learning. Such learning may be performed, for example, in the electronic device 101 itself on which the artificial intelligence model is performed, or may be performed through a separate server (eg, the server 108). The learning algorithm may include, for example, supervised learning, unsupervised learning, semi-supervised learning, or reinforcement learning, but in the above example not limited The artificial intelligence model may include a plurality of artificial neural network layers. Artificial neural networks include deep neural networks (DNNs), convolutional neural networks (CNNs), recurrent neural networks (RNNs), restricted boltzmann machines (RBMs), deep belief networks (DBNs), bidirectional recurrent deep neural networks (BRDNNs), It may be one of deep Q-networks or a combination of two or more of the above, but is not limited to the above example. The artificial intelligence model may include, in addition to, or alternatively, a software structure in addition to the hardware structure.

The memory 130 may store various data used by at least one component (eg, the processor 120 or the sensor module 176 ) of the electronic device 101 . The data may include, for example, input data or output data for software (eg, the program 140 ) and instructions related thereto. The memory 130 may include a volatile memory 132 or a non-volatile memory 134 .

The program 140 may be stored as software in the memory 130 , and may include, for example, an operating system 142 , middleware 144 , or an application 146 .

The input module 150 may receive a command or data to be used by a component (eg, the processor 120 ) of the electronic device 101 from the outside (eg, a user) of the electronic device 101 . The input module 150 may include, for example, a microphone, a mouse, a keyboard, a key (eg, a button), or a digital pen (eg, a stylus pen).

The sound output module 155 may output a sound signal to the outside of the electronic device 101 . The sound output module 155 may include, for example, a speaker or a receiver. The speaker can be used for general purposes such as multimedia playback or recording playback. The receiver can be used to receive incoming calls. According to one embodiment, the receiver may be implemented separately from or as part of the speaker.

The display module 160 may visually provide information to the outside (eg, a user) of the electronic device 101 . The display module 160 may include, for example, a control circuit for controlling a display, a hologram device, or a projector and a corresponding device. According to an embodiment, the display module 160 may include a touch sensor configured to sense a touch or a pressure sensor configured to measure the intensity of a force generated by the touch.

The audio module 170 may convert a sound into an electric signal or, conversely, convert an electric signal into a sound. According to an embodiment, the audio module 170 acquires a sound through the input module 150 or an external electronic device (eg, a sound output module 155 ) directly or wirelessly connected to the electronic device 101 . The electronic device 102) (eg, a speaker or headphones) may output a sound.

The sensor module 176 detects an operating state (eg, power or temperature) of the electronic device 101 or an external environmental state (eg, a user state), and generates an electrical signal or data value corresponding to the sensed state. can do. According to an embodiment, the sensor module 176 may include, for example, a gesture sensor, a gyro sensor, a barometric pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a proximity sensor, a color sensor, an IR (infrared) sensor, a biometric sensor, It may include a temperature sensor, a humidity sensor, or an illuminance sensor.

The interface 177 may support one or more specified protocols that may be used by the electronic device 101 to directly or wirelessly connect with an external electronic device (eg, the electronic device 102 ). According to an embodiment, the interface 177 may include, for example, a high definition multimedia interface (HDMI), a universal serial bus (USB) interface, an SD card interface, or an audio interface.

The connection terminal 178 may include a connector through which the electronic device 101 can be physically connected to an external electronic device (eg, the electronic device 102 ). According to an embodiment, the connection terminal 178 may include, for example, an HDMI connector, a USB connector, an SD card connector, or an audio connector (eg, a headphone connector).

The haptic module 179 may convert an electrical signal into a mechanical stimulus (eg, vibration or movement) or an electrical stimulus that the user can perceive through tactile or kinesthetic sense. According to an embodiment, the haptic module 179 may include, for example, a motor, a piezoelectric element, or an electrical stimulation device.

The camera module 180 may capture still images and moving images. According to an embodiment, the camera module 180 may include one or more lenses, image sensors, image signal processors, or flashes.

The power management module 188 may manage power supplied to the electronic device 101 . According to an embodiment, the power management module 188 may be implemented as, for example, at least a part of a power management integrated circuit (PMIC).

The battery 189 may supply power to at least one component of the electronic device 101 . According to one embodiment, battery 189 may include, for example, a non-rechargeable primary cell, a rechargeable secondary cell, or a fuel cell.

The communication module 190 is a direct (eg, wired) communication channel or a wireless communication channel between the electronic device 101 and an external electronic device (eg, the electronic device 102, the electronic device 104, or the server 108). It can support establishment and communication performance through the established communication channel. The communication module 190 may include one or more communication processors that operate independently of the processor 120 (eg, an application processor) and support direct (eg, wired) communication or wireless communication. According to one embodiment, the communication module 190 is a wireless communication module 192 (eg, a cellular communication module, a short-range wireless communication module, or a global navigation satellite system (GNSS) communication module) or a wired communication module 194 (eg, : It may include a local area network (LAN) communication module, or a power line communication module). A corresponding communication module among these communication modules is a first network 198 (eg, a short-range communication network such as Bluetooth, wireless fidelity (WiFi) direct, or infrared data association (IrDA)) or a second network 199 (eg, legacy It may communicate with the external electronic device 104 through a cellular network, a 5G network, a next-generation communication network, the Internet, or a computer network (eg, a telecommunication network such as a LAN or a WAN). These various types of communication modules may be integrated into one component (eg, a single chip) or may be implemented as a plurality of components (eg, multiple chips) separate from each other. The wireless communication module 192 uses subscriber information (eg, International Mobile Subscriber Identifier (IMSI)) stored in the subscriber identification module 196 within a communication network such as the first network 198 or the second network 199 . The electronic device 101 may be identified or authenticated.

The wireless communication module 192 may support a 5G network after a 4G network and a next-generation communication technology, for example, a new radio access technology (NR). NR access technology includes high-speed transmission of high-capacity data (eMBB (enhanced mobile broadband)), minimization of terminal power and access to multiple terminals (mMTC (massive machine type communications)), or high reliability and low latency (URLLC (ultra-reliable and low-latency) -latency communications)). The wireless communication module 192 may support a high frequency band (eg, mmWave band) to achieve a high data rate, for example. The wireless communication module 192 uses various techniques for securing performance in a high-frequency band, for example, beamforming, massive multiple-input and multiple-output (MIMO), all-dimensional multiplexing. It may support technologies such as full dimensional MIMO (FD-MIMO), an array antenna, analog beam-forming, or a large scale antenna. The wireless communication module 192 may support various requirements defined in the electronic device 101 , an external electronic device (eg, the electronic device 104 ), or a network system (eg, the second network 199 ). According to an embodiment, the wireless communication module 192 may include a peak data rate (eg, 20 Gbps or more) for realizing eMBB, loss coverage (eg, 164 dB or less) for realizing mMTC, or U-plane latency for realizing URLLC ( Example: Downlink (DL) and uplink (UL) each 0.5 ms or less, or round trip 1 ms or less) can be supported.

The antenna module 197 may transmit or receive a signal or power to the outside (eg, an external electronic device). According to an embodiment, the antenna module 197 may include an antenna including a conductor formed on a substrate (eg, a PCB) or a radiator formed of a conductive pattern. According to an embodiment, the antenna module 197 may include a plurality of antennas (eg, an array antenna). In this case, at least one antenna suitable for a communication method used in a communication network such as the first network 198 or the second network 199 is connected from the plurality of antennas by, for example, the communication module 190 . can be selected. A signal or power may be transmitted or received between the communication module 190 and an external electronic device through the selected at least one antenna. According to some embodiments, other components (eg, a radio frequency integrated circuit (RFIC)) other than the radiator may be additionally formed as a part of the antenna module 197 .

According to various embodiments, the antenna module 197 may form a mmWave antenna module. According to one embodiment, the mmWave antenna module comprises a printed circuit board, an RFIC disposed on or adjacent to a first side (eg, bottom side) of the printed circuit board and capable of supporting a designated high frequency band (eg, mmWave band); and a plurality of antennas (eg, an array antenna) disposed on or adjacent to a second side (eg, top or side) of the printed circuit board and capable of transmitting or receiving signals of the designated high frequency band. can do.

At least some of the components are connected to each other through a communication method between peripheral devices (eg, a bus, general purpose input and output (GPIO), serial peripheral interface (SPI), or mobile industry processor interface (MIPI)) and a signal ( e.g. commands or data) can be exchanged with each other.

According to an embodiment, the command or data may be transmitted or received between the electronic device 101 and the external electronic device 104 through the server 108 connected to the second network 199 . Each of the external

electronic devices

102 or 104 may be the same as or different from the electronic device 101 . According to an embodiment, all or a part of operations executed in the electronic device 101 may be executed in one or more external

electronic devices

102 , 104 , or 108 . For example, when the electronic device 101 needs to perform a function or service automatically or in response to a request from a user or other device, the electronic device 101 may perform the function or service itself instead of executing the function or service itself. Alternatively or additionally, one or more external electronic devices may be requested to perform at least a part of the function or the service. One or more external electronic devices that have received the request may execute at least a part of the requested function or service, or an additional function or service related to the request, and transmit a result of the execution to the electronic device 101 . The electronic device 101 may process the result as it is or additionally and provide it as at least a part of a response to the request. For this purpose, for example, cloud computing, distributed computing, mobile edge computing (MEC), or client-server computing technology may be used. The electronic device 101 may provide an ultra-low latency service using, for example, distributed computing or mobile edge computing. In another embodiment, the external electronic device 104 may include an Internet of things (IoT) device. The server 108 may be an intelligent server using machine learning and/or neural networks. According to an embodiment, the external electronic device 104 or the server 108 may be included in the second network 199 . The electronic device 101 may be applied to an intelligent service (eg, smart home, smart city, smart car, or health care) based on 5G communication technology and IoT-related technology.

Referring to FIG. 2 , the electronic device 200 (eg, the electronic device 101 of FIG. 1 ) may provide a wireless charging function through the wireless charging circuit 230 . For example, when a wireless charging device (eg, a wireless charging pad) receives DC power through an external power source and transmits AC power in the form of a magnetic field through the coil, the electronic device 200 transmits AC power in the form of a magnetic field to the coil 210 ) and can be converted to DC power. In this process, the wireless charging circuit 230 converts AC power received through the coil 210 into DC power through a rectifier 231, and an LDO regulator (low drop-out regulator) 233. DC power may be transferred to the power management circuit 250 through . The power management circuit 250 may receive DC power and perform a bucking operation to charge the battery. At this time, the processor 270 is the rectifier 231, the LDO regulator 233 and the bucking operation to the wireless charging circuit 230 and the power management circuit 250 through the I2C communication (239, 251). You can pass configuration information.

According to an embodiment, in order to perform wireless charging, the electronic device 200 may transmit data related to wireless charging to a wireless charging device that transmits power. For example, the electronic device 200 may transmit data related to wireless charging to the wireless charging device through in-band communication using an amplitude shift keying (ASK) method. In this case, the electronic device 200 may perform in-band communication through at least one in-band communication control circuit 220 connected between the coil 210 and the wireless charging circuit 230 . According to an embodiment, the in-band communication control circuit 220 may include a capacitor 221 and a transistor 223 . The in-band communication control circuit 220 may be activated/deactivated through an on/off operation of the transistor 223 , and when the in-band communication control circuit 220 is activated, the in-band communication control circuit 220 is activated. Band communication may be performed. Although FIG. 2 shows that the electronic device 200 includes four in-band communication control circuits 220 , the number of the in-band communication control circuits 220 is not limited thereto.

When performing the in-band communication, the AC power transferred from the wireless charging device to the electronic device 200 has a voltage value changed by a transistor operation inside the wireless charging circuit 230 , and thus the rectifier 231 The voltage rectified by ) may also be changed every time the in-band communication is performed. According to the change of the voltage value, the capacitor 235 (eg, MLCC) connected to the output terminal 231a of the rectifier 231 and the capacitor 237 connected to the output terminal 233a of the LDO regulator 233 (eg: MLCC) may generate noise (wireless charging noise) in an audible frequency band.

To detect the generation of the noise, the electronic device 200 may include a noise detection circuit 290 connected between the wireless charging circuit 230 and the processor 270 . The noise detection circuit 290 may be connected to the output terminal 231a of the rectifier 231 to detect the generation of the noise by checking the voltage value of the output terminal 231a.

According to an embodiment, the noise detection circuit 290 includes an output terminal 231a of the rectifier 231 and a general-purpose input/output port (GPIO) of the processor 270 (eg, the GPIO port of FIG. 5 ). (271)). According to another embodiment, the noise detection circuit 290 includes an output terminal 231a of the rectifier 231 and an analog-to-digital converter port of the processor 270 (eg, the ADC port of FIG. 8 ). (273)). According to another embodiment, the electronic device 200 may include two noise detection circuits 290 (eg, the first noise detection circuit 1010 and the second noise detection circuit 1030 of FIG. 10 ). , in this case, one noise detection circuit 290 (eg, the first noise detection circuit 1010 of FIG. 10 ) includes an output terminal 231a of the rectifier 231 and a GPIO port of the processor 270 (eg, FIG. 10), the other noise detection circuit 290 (eg, the second noise detection circuit 1030 of FIG. 10) is connected to the output terminal 231a of the rectifier 231 and the processor It may be connected to an ADC port of 270 (eg, ADC port 273 of FIG. 10 ). The configuration of the noise sensing circuit 290 will be described in detail with reference to FIGS. 5 to 10 to be described later.

3 is a diagram for explaining wireless charging noise generated during in-band communication according to an embodiment of the present invention, and FIG. 4 is a diagram illustrating wireless charging noise generated during in-band communication according to an embodiment of the present invention. It is another drawing for explanation.

3 and 4 , when in-band communication using the amplitude shift modulation (ASK) method is performed, AC power transferred from the wireless charging device to the electronic device 200 is a transistor inside the wireless charging circuit 230 . The voltage value is changed by the operation, so that the voltage rectified by the rectifier 231 may also change the voltage value whenever the in-band communication is performed. According to the change in the voltage value, vibration (vibration) of the capacitor 235 connected to the output terminal 231a of the rectifier 231 and the capacitor 237 connected to the output terminal 233a of the LDO regulator 233 occurs. , noise in the audible frequency band (wireless charging noise) may occur.

The waveform of the voltage that is changed when performing in-band communication using the ASK method (hereinafter referred to as the ASK waveform) is a size and The shape may change. The ASK waveform may include a positive waveform that is higher than the operating voltage and a negative waveform that is lower than the operating voltage. 3 shows a state in which the ASK waveform is a positive waveform, and FIG. 4 shows a state in which the ASK waveform is a negative waveform. As shown in FIG. 3, when the ASK waveform is a positive waveform, the waveform 310 of the voltage of the output terminal 231a of the rectifier 231 largely fluctuates in a state higher than the operating voltage, but the LDO regulator ( The waveform 320 of the voltage of the output terminal 233a of 233 may not vary significantly. However, as shown in FIG. 4 , when the ASK waveform is a negative waveform, the waveform 410 of the voltage of the output terminal 231a of the rectifier 231 is greatly changed in a state lower than the operating voltage, and the LDO The waveform 420 of the voltage of the output terminal 233a of the regulator 233 may also be significantly changed in a state lower than the operating voltage. That is, when the ASK waveform is a positive waveform, vibration (tremor) may occur only in the capacitor 235 connected to the output terminal 231a of the rectifier 231, but when the ASK waveform is a negative waveform, the rectifier 231 Since vibration (tremor) is generated not only in the capacitor 235 connected to the output terminal 231a of the LDO regulator 233 but also in the capacitor 237 connected to the output terminal 233a of the LDO regulator 233 , noise may be greater.

Referring to FIG. 5 , in order to detect noise generated during wireless charging, the electronic device 200 may include a noise detection circuit 500 (eg, the noise detection circuit 290 of FIG. 2 ). According to an embodiment, the noise detection circuit 500 may be disposed between the wireless charging circuit 230 and the processor 270 . For example, the noise detection circuit 500 may be connected to the output terminal 231a of the rectifier 231 in the wireless charging circuit 230 and the GPIO port 271 of the processor 270 .

The noise sensing circuit 500 may include a comparator 510 , a first resistance element 531 , a second resistance element 533 , and a capacitor 550 . The comparator 510 has an output terminal (eg, OUT in FIG. 5 ) connected to the GPIO port 271 of the processor 270 , and an input terminal (eg, IN- and IN+ in FIG. 5 ) of the rectifier 231 . It may be connected to the output terminal 231a. The first resistance element 531 may be connected between an output terminal 231a of the rectifier 231 and a first input terminal (eg, IN− in FIG. 5 ) of the comparator 510 . The second resistance element 533 may be connected between an output terminal 231a of the rectifier 231 and a second input terminal (eg, IN+ of FIG. 5 ) of the comparator 510 . The capacitor 550 may be connected between the second resistance element 533 and the second input terminal.

The first resistance element 531 and the second resistance element 533 divide the output voltage VRECT of the rectifier 231 so that the divided voltages are the first input terminal and the second input terminal of the comparator 510 , respectively. can be authorized as For example, the first resistance element 531 allows a portion of the output voltage of the rectifier 231 to be applied to the first input terminal of the comparator 510 , and the second resistance element 533 uses the rectifier ( Another part of the output voltage of 231 may be applied to the second input terminal of the comparator 510 .

According to an embodiment, the first resistance element 531 and the second resistance element 533 may have the same resistance value. In this case, the output voltage of the rectifier 231 may be equally divided and applied to the first input terminal and the second input terminal of the comparator 510 . That is, since the DC voltages applied to the first input terminal and the second input terminal of the comparator 510 are the same, the output value of the comparator 510 may be zero (0). In addition, since the capacitor 550 is connected between the second resistor element 533 and the second input terminal, the capacitor 550 is applied to the second input terminal of the comparator 510 during the in-band communication using the ASK method. The AC voltage used is changed by the capacitor 550 , and a voltage difference between the first input terminal and the second input terminal of the comparator 510 may be generated due to the change in the AC voltage. For this reason, the output value of the comparator 510 may also be changed in the period in which the in-band communication using the ASK method is performed. Also, a toggle signal may be generated using the changed output value of the comparator 510 . The toggle signal generated in this way is transmitted to the processor 270 through the GPIO port 271 , and the processor 270 can identify whether noise is generated through the toggle signal.

According to an embodiment, the processor 270 may determine whether the noise is noise according to in-band communication based on the toggle signal input through the GPIO port 271 . For example, when the toggle signal is periodically changed (eg, high -> low and low -> high) for a specified time, the processor 270 may determine that the noise is noise according to the in-band communication. have.

6 is a diagram for explaining an output voltage of a circuit for detecting wireless charging noise according to an embodiment of the present invention, and FIG. 7 is an output of a circuit for detecting wireless charging noise according to an embodiment of the present invention Another diagram for explaining the voltage.

6 and 7 , the noise detection circuit (eg, the noise detection circuit 500 of FIG. 5 ) for detecting noise generated during wireless charging is a processor (eg, the processor 270 of FIG. 5 ) of GPIO port (eg, GPIO port 271 in FIG. 5 ) a comparator (eg, comparator 510 in FIG. 5 ) whose output is connected to a rectifier in a wireless charging circuit (eg, wireless charging circuit 230 in FIG. 5 ) (For example, the output terminal (eg, the output terminal 231a of FIG. 5 ) of (eg, the rectifier 231 of FIG. 5 ) and a first resistance element connected to the first input terminal of the comparator (eg, the resistance element 531 of FIG. 5 )) , a second resistance element connected to the output terminal of the rectifier and the second input terminal of the comparator (eg, the resistance element 533 of FIG. 5 ), and a capacitor connected between the second resistance element and the second input terminal (eg : Capacitor 550 of FIG. 5) may be included.

According to an embodiment, when the first resistance element and the second resistance element have the same resistance value, since the DC voltages applied to the first input terminal and the second input terminal of the comparator are the same, the ASK method is used. In a section in which -band communication is not performed, the output value of the comparator may be maintained at zero (0). In addition, since the capacitor is connected between the second resistor element and the second input terminal, the AC voltage applied to the second input terminal of the comparator is applied by the capacitor during the in-band communication using the ASK method. Since the voltage difference between the first input terminal and the second input terminal of the comparator is generated due to the change of the AC voltage, the output value of the comparator may also be changed.

6 and 7 show a toggle signal generated using a changed output value of the comparator. In FIG. 6, a waveform 610 of the output voltage of the rectifier when the ASK waveform is a positive waveform and a waveform 620 of a toggle signal (eg, a 1.8V toggle signal) generated using the changed output value of the comparator 7, the waveform 720 of the output voltage of the rectifier when the ASK waveform is a negative waveform 710 and the waveform 720 of the toggle signal (eg, 1.8V toggle signal) generated using the changed output value of the comparator ) is indicated. As shown in FIGS. 6 and 7, in both the case where the ASK waveform is a positive waveform and the case where it is a negative waveform, fluctuations in the

waveforms

610 and 710 of the output voltage of the rectifier (eg, the formation of ripples) Based on the toggle signal may be generated. The toggle signal generated in this way is transmitted to the processor through the GPIO port, and the processor may identify whether noise is generated through the toggle signal.

Referring to FIG. 8 , in order to detect noise generated during wireless charging, the electronic device 200 may include a noise detection circuit 800 (eg, the noise detection circuit 290 of FIG. 2 ). According to an embodiment, the noise detection circuit 800 may be disposed between the wireless charging circuit 230 and the processor 270 . For example, the noise detection circuit 800 may be connected to the output terminal 231a of the rectifier 231 in the wireless charging circuit 230 and the ADC port 273 of the processor 270 .

The noise sensing circuit 800 may include a capacitor 830 connected between the output terminal 231a of the rectifier 231 and the ADC port 273 of the processor 270 . The noise sensing circuit 800 may further include a resistance element 810 .

According to an embodiment, when the capacitance value of the capacitor 830 has a specified value, the ASK waveform may be flat during the period in which the in-band communication using the ASK method is performed. In this case, voltage values in a section in which in-band communication using the ASK method is performed and in a section in which in-band communication using the ASK method is not performed may be identified differently in the ADC port 273 . The processor 270 may identify whether noise is generated and the size of the noise by using the difference in the voltage values identified by the ADC port 273 . Since the processor 270 can identify whether noise is generated and the size of the noise through the noise detection circuit 800 , it can also determine whether to reduce the noise based on the size of the noise.

According to an embodiment, the processor 270 may determine whether the noise is noise according to in-band communication based on a difference in voltage values identified at the ADC port 273 . For example, when the difference between the voltage values identified at the ADC port 273 is greater than or equal to a specified size, the processor 270 may determine that the noise is noise according to the in-band communication.

According to an embodiment, the processor 270 may determine the level of noise based on a difference in voltage values identified at the ADC port 273 . For example, the processor 270 determines the magnitude of the noise by comparing the average value of the voltage value identified in the ADC port 273 at the measurement time and the voltage value identified in the ADC port 273 for a specified time. can do. As another example, the processor 270 may determine the level of the noise using a difference between a maximum value and a minimum value of the voltage value identified in the ADC port 273 for a specified time period.

Referring to FIG. 9 , a noise detection circuit (eg, the noise detection circuit 800 of FIG. 8 ) for detecting noise generated during wireless charging is a wireless charging circuit (eg, the wireless charging circuit 230 of FIG. 8 )) The output terminal of the rectifier (eg, the rectifier 231 of FIG. 8 ) (eg, the output terminal 231a of FIG. 8 ) and the ADC port of the processor (eg, the processor 270 of FIG. 8 ) (eg, the ADC port of FIG. 8 ) 273 ) may include a capacitor (eg, the capacitor 830 of FIG. 8 ) connected therebetween.

According to an embodiment, when the capacitance value of the capacitor has a specified value, the ASK waveform is flat in a period in which in-band communication using the ASK method is performed, and in a period in which in-band communication using the ASK method is performed. and voltage values in a section in which in-band communication using the ASK method is not performed may be identified differently in the ADC port.

9,

waveforms

921, 922, and 923 of the output voltage of the noise sensing circuit according to the

waveforms

911, 912, and 913 of the output voltage of the rectifier are shown. As shown in FIG. 9, as the amplitude of the

waveforms

911, 912, and 913 of the output voltage of the rectifier (eg, the magnitude of the changed voltage value or the magnitude of the ripple formed) decreases, identification at the ADC port A possible difference in output voltage values of the noise detection circuit may also be reduced. The processor may identify whether noise is generated and the magnitude of the noise by using the difference in the voltage values identified at the ADC port.

Referring to FIG. 10 , in order to detect noise generated during wireless charging, the electronic device 200 includes a first noise detection circuit 1010 (eg, the noise detection circuit 500 of FIG. 5 ) and a second noise detection circuit 1030 (eg, the noise sensing circuit 800 of FIG. 8 ) may be included. According to an embodiment, the first noise detection circuit 1010 and the second noise detection circuit 1030 may be disposed between the wireless charging circuit 230 and the processor 270 . For example, the first noise detection circuit 1010 is connected to the output terminal 231a of the rectifier 231 in the wireless charging circuit 230 and the GPIO port 271 of the processor 270, and the second The noise detection circuit 1030 may be connected to the output terminal 231a of the rectifier 231 and the ADC port 273 of the processor 270 . Although FIG. 10 shows a state in which there are two noise sensing circuits connected to the processor 270 , the number of the noise sensing circuits is not limited thereto.

When the electronic device 200 includes at least two circuits for detecting noise generated during wireless charging, the accuracy of noise detection may be increased. In addition, since the at least two or more noise detection circuits are connected to different ports of the processor 270, the electronic device 200 can detect noise generated during wireless charging even in a limited situation in which some ports cannot be used. have. For example, in a situation where the ADC port 273 of the processor 270 cannot be used, the electronic device 200 uses a noise detection circuit (eg, the first Noise generated during wireless charging may be detected using the noise sensing circuit 1010).

As described above, according to various embodiments, the electronic device (eg, the electronic device 200) includes a wireless charging circuit (eg, the rectifier (eg, the rectifier 231)) for converting AC power into DC power. : wireless charging circuit 230), a processor electrically connected to the wireless charging circuit (eg, processor 270), and a noise sensing circuit (eg, noise sensing circuit 290, connected between the wireless charging circuit and the processor) 500, 1010)), wherein the noise detection circuit includes a comparator (eg, comparator 510) having an output terminal connected to a GPIO port (eg, GPIO port 271) of the processor, and an output terminal of the rectifier (eg, a comparator 510). : connected to the output terminal 231a), a first resistance element (eg, the first resistance element 531) for applying a part of the output voltage of the rectifier to the first input terminal of the comparator, connected to the output terminal of the rectifier a second resistance element (eg, a second resistance element 533) for applying another part of the output voltage of the rectifier to the second input terminal of the comparator, and between the second resistance element and the second input terminal It may include a connected capacitor (eg, capacitor 550).

According to various embodiments, the first resistance element and the second resistance element may have the same resistance value.

According to various embodiments, the processor may be configured to determine whether noise is generated based on a toggle signal input through the GPIO port.

According to various embodiments, when the toggle signal is periodically changed for a specified time, the processor may be configured to determine that the noise is noise according to in-band communication.

According to various embodiments, when it is determined that the noise is the noise according to the in-band communication, the processor adjusts the output voltage of the rectifier or an activated in-band communication control circuit (eg, an in-band communication control circuit) (220)) may be set to perform at least one of deactivation of some.

As described above, according to various embodiments, the electronic device (eg, the electronic device 200) includes a wireless charging circuit (eg, the rectifier (eg, the rectifier 231)) for converting AC power into DC power. : wireless charging circuit 230), a processor electrically connected to the wireless charging circuit (eg, processor 270), and a noise sensing circuit (eg, noise sensing circuit 290, connected between the wireless charging circuit and the processor) 800, 1030)), wherein the noise detection circuit is connected between an output terminal (eg, output terminal 231a) of the rectifier and an ADC port (eg, ADC port 273) of the processor, and a capacitor (eg, : A capacitor 830) may be included.

According to various embodiments, the processor may be configured to determine whether noise is generated based on a difference in voltage values identified through the ADC port.

According to various embodiments, the processor may be configured to determine that the noise is noise according to in-band communication when the difference between the voltage values is greater than or equal to a specified level.

According to various embodiments, the processor may be configured to determine the level of noise based on a difference in voltage values identified through the ADC port.

According to various embodiments, the processor is a result of comparing the average value of the voltage value identified at the ADC port at the time of measurement and the voltage value identified at the ADC port for a specified time, or at the ADC port for a specified time It may be set to determine the magnitude of the noise using a difference between a maximum value and a minimum value of the identified voltage value.

According to various embodiments, further comprising another noise detection circuit (eg,

noise detection circuits

290, 500, 1010) connected between the wireless charging circuit and the processor, wherein the other noise detection circuit is a GPIO of the processor A comparator (eg, comparator 510) having an output terminal connected to the port, and a first resistance element (eg, a first resistance element) connected to an output terminal of the rectifier and applying a portion of an output voltage of the rectifier to a first input terminal of the comparator 1 resistance element 531), a second resistance element connected to the output terminal of the rectifier, and for applying another part of the output voltage of the rectifier to the second input terminal of the comparator (eg, a second resistance element 533)) , and a capacitor (eg, a capacitor 550) connected between the second resistance element and the second input terminal.

Referring to FIG. 11 , in operation 1110 , the processor (eg, the processor 270 of FIG. 2 ) of the electronic device (eg, the electronic device 200 of FIG. 2 ) may determine whether it is in a wireless charging state. According to an embodiment, the processor may determine whether power is received from an external electronic device (eg, a wireless charging device) through a wireless charging coil (eg, the coil 210 of FIG. 2 ).

If it is determined that the wireless charging state is not in the wireless charging state (operation 1110 - NO), the processor may end a process related to the noise detection and reduction operation.

If it is determined that the wireless charging state is in the wireless charging state (operation 1110 - Yes), in operation 1120 , the processor may determine whether noise generated during wireless charging is detected. The electronic device may include at least one noise detection circuit (eg, the noise detection circuit 290 of FIG. 2 ) for detecting noise generated during wireless charging.

According to an embodiment, the electronic device includes an output terminal of a rectifier (eg, the rectifier 231 of FIGS. 2 and 5 ) in the wireless charging circuit (eg, the wireless charging circuit 230 of FIGS. 2 and 5 ) (eg, FIG. 2 and a first noise detection circuit (eg, the noise detection circuit 500 of FIG. 5) connected between the output terminal 231a of FIGS. 2 and 5) and the GPIO port of the processor (eg, the GPIO port 271 of FIG. 5) may include The first noise detection circuit includes a comparator having an output connected to the GPIO port of the processor (eg, the comparator 510 in FIG. 5 ), an output of the rectifier and a first resistance element connected to the first input of the comparator (eg : the resistance element 531 of FIG. 5), a second resistance element connected to the output terminal of the rectifier and the second input terminal of the comparator (eg, the resistance element 533 of FIG. 5), and the second resistance element and the A capacitor (eg, the capacitor 550 of FIG. 5 ) connected between the second input terminals may be included. In this case, a toggle signal may be generated using the output value of the comparator, and the processor may determine whether noise is generated based on the toggle signal input through the GPIO port.

According to an embodiment, the electronic device includes an output terminal (eg, the rectifier 231 of FIGS. 2 and 8 ) in the wireless charging circuit (eg, the wireless charging circuit 230 of FIGS. 2 and 8 ) in FIGS. 2 and a second noise detection circuit (eg, the noise detection circuit 800 of FIG. 8 ) connected between the output terminal 231a of FIGS. 2 and 8 ) and the ADC port of the processor (eg, the ADC port 273 of FIG. 8 )) may include The second noise sensing circuit may include a capacitor (eg, the capacitor 830 of FIG. 8 ) connected between the output terminal of the rectifier and the ADC port of the processor. In this case, the processor may identify whether noise is generated and the magnitude of the noise by using a difference in voltage values identified at the ADC port.

According to an embodiment, the electronic device may include the first noise detection circuit and the second noise detection circuit. For example, the electronic device includes an output terminal (eg, FIGS. 2 and 10 ) of a rectifier (eg, the rectifier 231 of FIGS. 2 and 10 ) in the wireless charging circuit (eg, the wireless charging circuit 230 of FIGS. 2 and 10 ). The first noise detection circuit (eg, the first noise detection circuit 1010 of FIG. 10) connected to the output terminal 231a of FIG. 10) and the GPIO port of the processor (eg, the GPIO port 271 of FIG. 10) and the second noise detection circuit (eg, the second noise detection circuit 1030 of FIG. 10 ) connected to the output terminal of the rectifier and the ADC port of the processor (eg, the ADC port 273 of FIG. 10 ) can do.

If the noise is not detected (operation 1120 - No), the processor may end a process related to the noise detection and reduction operation.

When the noise is detected (operation 1120 - Yes), in operation 1130, the processor may determine whether the noise is noise according to in-band communication. In order to perform wireless charging, the electronic device may transmit data related to wireless charging to a wireless charging device that transmits power. According to an embodiment, the electronic device may transmit data related to wireless charging to the wireless charging device through in-band communication using an amplitude shift modulation (ASK) method. In this case, the electronic device may perform in-band communication through at least one in-band communication control circuit (eg, the in-band communication control circuit 220 of FIG. 2 ) connected between the coil and the wireless charging circuit. have. According to an embodiment, the in-band communication control circuit may include a capacitor (eg, the capacitor 221 of FIG. 2 ) and a transistor (eg, the transistor 223 of FIG. 2 ). The in-band communication control circuit may be activated/deactivated through an on/off operation of the transistor, and when the in-band communication control circuit is activated, in-band communication may be performed.

When performing the in-band communication, the AC power transferred from the wireless charging device to the electronic device has a voltage value changed by a transistor operation inside the wireless charging circuit, and thus the voltage rectified by the rectifier is also the same. -Voltage value can be changed every time band communication is performed. According to the change of the voltage value, the output terminal of the capacitor (eg, the capacitor 235 of FIG. 2 ) and the LDO regulator (eg, the LDO regulator 233 of FIG. 2 ) connected to the output terminal of the rectifier (eg, the output terminal of FIG. 2 ) As vibration (vibration) of the capacitor (eg, the capacitor 237 of FIG. 2 ) connected to 233a ) occurs, noise (wireless charging noise) in an audible frequency band may be generated.

According to an embodiment, when the electronic device includes the first noise detection circuit connected between the output terminal of the rectifier and the GPIO port of the processor, the processor is configured to operate based on the toggle signal input through the GPIO port. It may be determined whether the noise is noise according to the in-band communication. For example, when the toggle signal is periodically changed (eg, high -> low and low -> high) for a specified time, the processor may determine that the noise is noise according to the in-band communication.

According to an embodiment, when the electronic device includes the second noise detection circuit connected between the output terminal of the rectifier and the ADC port of the processor, the processor is configured to operate based on a difference in voltage values identified at the ADC port. It may be determined whether the noise is noise according to the in-band communication. For example, when the difference between the voltage values identified in the ADC port is greater than or equal to a specified size, the processor may determine that the noise is noise according to the in-band communication. According to an embodiment, when the electronic device includes the second noise detection circuit connected between the output terminal of the rectifier and the ADC port of the processor, the processor is configured to operate based on a difference in voltage values identified at the ADC port. The magnitude of the noise may be determined. For example, the processor may determine the magnitude of the noise by comparing the average value of the voltage value identified at the ADC port at the measurement time and the voltage value identified at the ADC port for a specified time. As another example, the processor may determine the level of the noise using a difference between a maximum value and a minimum value of a voltage value identified in the ADC port for a specified time period.

If it is determined that the noise is not noise according to in-band communication (operation 1130 - NO), the processor may end a process related to a noise detection and reduction operation.

If it is determined that the noise is noise according to in-band communication (operation 1130 - Yes), in operation 1140, the processor may determine whether the external environment of the electronic device is an environment of a specified condition. The environment of the specified condition may be an environment in which the user of the electronic device may recognize noise generated during wireless charging. For example, the environment of the specified condition may include at least one of a low ambient noise state, a user's sleep state, a dark environment such as at night, a time period set by the user, or a state in which the electronic device is not used. have. The specified condition is when the external noise (ambient noise) is less than the specified level, when the user's sleep information is obtained, when the illuminance value is less than the specified size, when the current time is included in the set time zone, or when the screen of the display is turned off ( off) may include at least one of the state.

If it is determined that the external environment of the electronic device does not meet the specified condition (operation 1140 - NO), the processor may end a process related to the noise detection and reduction operation. For example, in a state in which the user uses the electronic device in a place where there is a lot of ambient noise, the user may not recognize the noise generated during wireless charging or may not feel a great discomfort due to the generated noise, in operation 1150 . may not perform the noise reduction operation.

If it is determined that the external environment of the electronic device is the environment of the specified condition (operation 1140 - Yes), in operation 1150 , the processor may perform a noise reduction operation. According to an embodiment, the processor may reduce the noise by adjusting (eg, reducing) the output voltage of the rectifier. For example, the processor may reduce the noise by reducing a wireless charging voltage for charging the battery. According to another embodiment, the processor may reduce the noise by deactivating a part of an activated in-band communication control circuit. For example, the processor may deactivate the in-band communication control circuit by turning off a transistor included in a part of the activated in-band communication control circuit. In other words, the processor may reduce the noise by reducing the number of activated in-band communication control circuits.

Referring to FIG. 12 , a processor (eg, the processor 270 of FIG. 2 ) of the electronic device (eg, the electronic device 200 of FIG. 2 ) may reduce noise generated during wireless charging. In operation 1210, the processor may determine whether the number of activated in-band communication control circuits (eg, the in-band communication control circuit 220 of FIG. 2 ) is less than or equal to a specified number. The in-band communication control circuit may be used when the electronic device transmits data related to wireless charging to an external electronic device that transmits power in order to perform wireless charging. Accordingly, during wireless charging, more than a specified number of the in-band communication control circuit may maintain an active state.

When the activated in-band communication control circuit is less than or equal to the specified number (operation 1210 - Yes), in operation 1220, the processor adjusts (eg, decreases) the output voltage of a rectifier (eg, rectifier 231 of FIG. 2 ) ) to reduce the noise. For example, the processor may reduce the noise by reducing a wireless charging voltage for charging the battery.

If the activated in-band communication control circuit is not equal to or less than the specified number (operation 1210 - No), in operation 1230, the processor may deactivate a part of the activated in-band communication control circuit to reduce the noise. have. For example, the processor may deactivate the in-band communication control circuit by turning off a transistor (eg, the transistor 223 of FIG. 2 ) included in a part of the activated in-band communication control circuit. In other words, the processor may reduce the noise by reducing the number of activated in-band communication control circuits.

According to an embodiment, after operation 1220 or operation 1230 is performed, in operation 1240 , the processor may detect whether noise is generated through a noise detection circuit (eg, the noise detection circuit 290 of FIG. 2 ). For example, the processor may detect whether noise is generated again after the noise reduction operation.

When the noise is not detected (operation 1240 - NO), the processor may end a process related to the noise reduction operation.

When the noise is detected (operation 1240 - Yes), the processor may return to operation 1210 to perform the noise reduction operation again.

According to an embodiment, operations 1210, 1220, and 1230 in FIG. 12 may be included in operation 1150 in FIG. 11 . Also, operation 1240 in FIG. 12 may be performed after operation 1150 in FIG. 11 .

Referring to FIG. 13 , a processor (eg, the processor 270 of FIG. 2 ) of the electronic device (eg, the electronic device 200 of FIG. 2 ) may reduce noise generated during wireless charging. For example, the processor may reduce the noise by inactivating a part of an activated in-band communication control circuit (eg, the in-band communication control circuit 220 of FIG. 2 ). For example, the processor may deactivate the in-band communication control circuit by turning off a transistor (eg, the transistor 223 of FIG. 2 ) included in a part of the activated in-band communication control circuit. In other words, the processor may reduce the noise by reducing the number of activated in-band communication control circuits.

Since the in-band communication control circuit is used when an electronic device transmits data related to wireless charging to an external electronic device that transmits power in order to perform wireless charging, the designated circuit of the in-band communication control circuit during wireless charging More than a number can maintain an active state. In addition, due to activation/deactivation switching of the in-band communication control circuit, disconnection of wireless charging may occur. In this case, the processor may prevent (or improve) the disconnection of wireless charging by activating a part of the in-band communication control circuit that has been deactivated.

In operation 1310, the processor may determine whether the wireless charging terminal is re-recognized. For example, the processor may determine whether the wireless charging terminal is re-recognized after the wireless charging from the wireless charging terminal (or wireless charging device) that transmits power to the electronic device is cut off.

When the wireless charging terminal is not recognized again (operation 1310 - No), the processor may end a process related to the adjustment operation of the in-band communication control circuit.

When the wireless charging terminal is re-recognized (operation 1310 - Yes), in operation 1320, the processor may determine whether the number of re-recognition of the wireless charging terminal exceeds a specified number. For example, the processor may determine whether the number of disconnections of wireless charging exceeds the specified number (eg, two times).

If the number of re-recognition of the wireless charging terminal does not exceed the specified number (operation 1320 - NO), the processor may end the process related to the adjustment operation of the in-band communication control circuit.

When the number of re-recognition of the wireless charging terminal exceeds the specified number (operation 1320 - Yes), in operation 1330, the processor may determine whether there is a deactivation history of the in-band communication control circuit. For example, the processor may check whether there is a history of deactivating the in-band communication control circuit activated for a specified time.

When there is no history of deactivation of the in-band communication control circuit (operation 1330 - NO), the processor may end a process related to the adjusting operation of the in-band communication control circuit.

If there is a history of deactivation of the in-band communication control circuit (operation 1330 - Yes), in operation 1340, the processor may activate a part of the in-band communication control circuit that has been deactivated. For example, the processor may activate the in-band communication control circuit by turning on a transistor (eg, the transistor 223 of FIG. 2 ) included in the deactivated part of the in-band communication control circuit. In other words, the processor may prevent (or improve) the disconnection of wireless charging by activating a part of the in-band communication control circuit that has been deactivated.

According to an embodiment, when a part of the deactivated in-band communication control circuit is activated, noise generated during wireless charging may increase. In this case, as in operation 1220 of FIG. 12 , the processor may reduce the noise by adjusting (eg, reducing) the output voltage of a rectifier (eg, the rectifier 231 of FIG. 2 ). For example, the processor may reduce the noise by reducing a wireless charging voltage for charging the battery.

As described above, according to various embodiments, the method of processing wireless charging noise includes an operation of determining whether a wireless charging state is in the wireless charging state (eg operation 1110), and an operation of detecting noise generated in the wireless charging state (eg operation). 1120), in response to detecting the noise, determining whether the noise is noise according to in-band communication (eg, operation 1130), in response to determining that the noise is noise according to in-band communication, An operation of determining whether an external environment of the electronic device satisfies a specified condition (eg, operation 1140), and an operation of reducing the noise (eg, operation) in response to determining that the external environment of the electronic device satisfies the specified condition 1150) may be included.

According to various embodiments, the detecting of the noise may include a comparator having an output terminal connected to a GPIO port of a processor included in the electronic device, an output terminal connected to an output terminal of a rectifier in a wireless charging circuit included in the electronic device, and the rectifier A first resistor element for applying a portion of the output voltage to the first input terminal of the comparator, a second resistor element connected to the output terminal of the rectifier and for applying another portion of the output voltage of the rectifier to the second input terminal of the comparator , and detecting the noise based on a toggle signal input to the GPIO port from a noise sensing circuit including a capacitor connected between the second resistor element and the second input terminal.

According to various embodiments, the operation of determining whether the noise is noise according to the in-band communication includes determining that the noise is noise according to the in-band communication when the toggle signal is periodically changed for a specified time It can include actions.

According to various embodiments, the detecting of the noise may include a noise sensing circuit connected between an output terminal of a rectifier in a wireless charging circuit included in the electronic device and an ADC port of a processor included in the electronic device and including a capacitor. and detecting the noise based on a difference in voltage values input to the ADC port.

According to various embodiments, the determining whether the noise is the noise according to the in-band communication is an operation of determining whether the noise is the noise according to the in-band communication when the difference between the voltage values is greater than or equal to a specified size may include

According to various embodiments, the operation of reducing the noise includes at least one of adjusting an output voltage of a rectifier in a wireless charging circuit included in the electronic device or deactivating a part of an activated in-band communication control circuit may include

According to various embodiments, the operation of reducing the noise includes determining whether the number of activated in-band communication control circuits is equal to or less than a specified number (eg, operation 1210), In response to determining that the number is less than or equal to the specified number, an operation of adjusting an output voltage of a rectifier in a wireless charging circuit included in the electronic device (eg, operation 1220 ), and the number of activated in-band communication control circuits In response to determining that the number is not equal to or less than the specified number, an operation (eg, operation 1230) of deactivating some of the activated in-band communication control circuits may be included.

According to various embodiments, the method of processing the wireless charging noise includes an operation of determining whether the number of times of re-recognition of a wireless charging device transmitting power to the electronic device exceeds a specified number (eg, operation 1320), In response to determining that the number of re-recognition exceeds the specified number, determining whether there is a history of deactivation of the in-band communication control circuit (eg, operation 1330), and there is a history of deactivation of the in-band communication control circuit In response to the determination that the in-band communication control circuit is deactivated, an operation (eg, operation 1340 ) of activating a part may be included.

The electronic device according to various embodiments disclosed in this document may have various types of devices. The electronic device may include, for example, a portable communication device (eg, a smart phone), a computer device, a portable multimedia device, a portable medical device, a camera, a wearable device, or a home appliance device. The electronic device according to the embodiment of the present document is not limited to the above-described devices.

The various embodiments of this document and terms used therein are not intended to limit the technical features described in this document to specific embodiments, but it should be understood to include various modifications, equivalents, or substitutions of the embodiments. In connection with the description of the drawings, like reference numerals may be used for similar or related components. The singular form of the noun corresponding to the item may include one or more of the item, unless the relevant context clearly dictates otherwise. As used herein, "A or B", "at least one of A and B", "at least one of A or B", "A, B or C", "at least one of A, B and C", and "A , B, or C," each of which may include any one of the items listed together in the corresponding one of the phrases, or all possible combinations thereof. Terms such as “first”, “second”, or “first” or “second” may simply be used to distinguish the component from other such components, and refer to those components in other aspects (e.g., importance or order) is not limited. It is said that one (eg, first) component is “coupled” or “connected” to another (eg, second) component, with or without the terms “functionally” or “communicatively”. When referenced, it means that one component can be connected to the other component directly (eg by wire), wirelessly, or through a third component.

The term “module” used in various embodiments of this document may include a unit implemented in hardware, software, or firmware, and is interchangeable with terms such as, for example, logic, logic block, component, or circuit. can be used as A module may be an integrally formed part or a minimum unit or a part of the part that performs one or more functions. For example, according to an embodiment, the module may be implemented in the form of an application-specific integrated circuit (ASIC).

Various embodiments of the present document include one or more stored in a storage medium (eg, the internal memory 136 or the external memory 138) readable by a machine (eg, the electronic device 101). It may be implemented as software (eg, program 140) including instructions. For example, the processor (eg, the processor 120 ) of the device (eg, the electronic device 101 ) may call at least one of the one or more instructions stored from the storage medium and execute it. This makes it possible for the device to be operated to perform at least one function according to the called at least one command. The one or more instructions may include code generated by a compiler or code executable by an interpreter. The device-readable storage medium may be provided in the form of a non-transitory storage medium. Here, 'non-transitory' only means that the storage medium is a tangible device and does not contain a signal (eg, electromagnetic wave), and this term is used in cases where data is semi-permanently stored in the storage medium and It does not distinguish between temporary storage cases.

According to one embodiment, the method according to various embodiments disclosed in this document may be provided in a computer program product (computer program product). Computer program products may be traded between sellers and buyers as commodities. The computer program product is distributed in the form of a machine-readable storage medium (eg compact disc read only memory (CD-ROM)), or via an application store (eg Play Store ^TM ) or on two user devices ( It can be distributed (eg downloaded or uploaded) directly or online between smartphones (eg: smartphones). In the case of online distribution, at least a portion of the computer program product may be temporarily stored or temporarily generated in a machine-readable storage medium such as a memory of a server of a manufacturer, a server of an application store, or a memory of a relay server.

According to various embodiments, each component (eg, a module or a program) of the above-described components may include a singular or a plurality of entities, and some of the plurality of entities may be separately disposed in other components. have. According to various embodiments, one or more components or operations among the above-described corresponding components may be omitted, or one or more other components or operations may be added. Alternatively or additionally, a plurality of components (eg, a module or a program) may be integrated into one component. In this case, the integrated component may perform one or more functions of each component of the plurality of components identically or similarly to those performed by the corresponding component among the plurality of components prior to the integration. . According to various embodiments, operations performed by a module, program, or other component are executed sequentially, in parallel, repeatedly, or heuristically, or one or more of the operations are executed in a different order, or omitted. , or one or more other operations may be added.

Claims

In an electronic device,

a wireless charging circuit including a rectifier for converting AC power to DC power;

a processor electrically connected to the wireless charging circuit; and

a noise sensing circuit coupled between the wireless charging circuit and the processor;

The noise detection circuit comprises:

a comparator whose output terminal is connected to the GPIO port of the processor;

a first resistance element connected to an output terminal of the rectifier and configured to apply a portion of an output voltage of the rectifier to a first input terminal of the comparator;

a second resistance element connected to an output terminal of the rectifier and configured to apply another portion of an output voltage of the rectifier to a second input terminal of the comparator; and

and a capacitor connected between the second resistance element and the second input terminal.
The method according to claim 1,

The first resistance element and the second resistance element have the same resistance value.
The method according to claim 1,

The processor is

An electronic device configured to determine whether noise is generated based on a toggle signal input through the GPIO port.
4. The method of claim 3,

The processor is

an electronic device configured to determine that the noise is noise according to in-band communication when the toggle signal is periodically changed for a specified time.
5. The method according to claim 4,

The processor is

An electronic device configured to perform at least one of adjusting an output voltage of the rectifier or deactivating a part of an activated in-band communication control circuit when it is determined that the noise is noise according to the in-band communication.
In an electronic device,

a wireless charging circuit including a rectifier for converting AC power to DC power;

a processor electrically connected to the wireless charging circuit; and

a noise sensing circuit coupled between the wireless charging circuit and the processor;

The noise detection circuit comprises:

and a capacitor connected between an output terminal of the rectifier and an ADC port of the processor.
7. The method of claim 6,

The processor is

An electronic device configured to determine whether noise is generated based on a difference in voltage values identified through the ADC port.
8. The method of claim 7,

The processor is

An electronic device configured to determine that the noise is noise according to in-band communication when the difference between the voltage values is greater than or equal to a specified level.
9. The method of claim 8,

The processor is

An electronic device configured to perform at least one of adjusting an output voltage of the rectifier or deactivating a part of an activated in-band communication control circuit when it is determined that the noise is noise according to the in-band communication.
7. The method of claim 6,

The processor is

An electronic device configured to determine a level of noise based on a difference in voltage values identified through the ADC port.
11. The method of claim 10,

The processor is

As a result of comparing the average value of the voltage value identified at the ADC port at the time of measurement and the voltage value identified at the ADC port for a specified time, or the maximum value and the minimum value of the voltage value identified at the ADC port during the specified time An electronic device configured to determine the level of the noise using the difference.
7. The method of claim 6,

Another noise sensing circuit connected between the wireless charging circuit and the processor,

The other noise detection circuit,

a comparator whose output terminal is connected to the GPIO port of the processor;

a first resistance element connected to an output terminal of the rectifier and configured to apply a portion of an output voltage of the rectifier to a first input terminal of the comparator;

a second resistance element connected to an output terminal of the rectifier and configured to apply another portion of an output voltage of the rectifier to a second input terminal of the comparator; and

and a capacitor connected between the second resistance element and the second input terminal.
In the method of processing wireless charging noise,

Determining whether the wireless charging state;

detecting noise generated in the wireless charging state;

determining whether the noise is noise according to in-band communication in response to the detection of the noise;

determining whether an external environment of the electronic device satisfies a specified condition in response to determining that the noise is noise according to the in-band communication; and

and reducing the noise in response to determining that the external environment of the electronic device satisfies the specified condition.
14. The method of claim 13,

The operation of detecting the noise is

A comparator having an output terminal connected to a GPIO port of a processor included in the electronic device, connected to an output terminal of a rectifier in a wireless charging circuit included in the electronic device, and applying a portion of an output voltage of the rectifier to a first input terminal of the comparator a first resistor element for A method of processing wireless charging noise, comprising: detecting the noise based on a toggle signal input to the GPIO port from a noise sensing circuit including a connected capacitor.
14. The method of claim 13,

The operation of detecting the noise is

Based on the difference in voltage value input to the ADC port from the noise sensing circuit connected between the output terminal of the rectifier in the wireless charging circuit included in the electronic device and the ADC port of the processor included in the electronic device and including a capacitor, the A method of processing wireless charging noise, comprising the operation of detecting the noise.