CN113489079B

CN113489079B - Terminal device and charging system

Info

Publication number: CN113489079B
Application number: CN202110574424.9A
Authority: CN
Inventors: 王穆
Original assignee: Honor Device Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2021-05-25
Filing date: 2021-05-25
Publication date: 2022-07-22
Anticipated expiration: 2041-05-25
Also published as: CN113489079A

Abstract

The embodiment of the application provides terminal equipment and a charging system, and relates to the technical field of terminals. The embodiment of the application sets up the resistance in series between the D-of USB port and SCP agreement IC to and set up the resistance in series between the D + of USB port and SCP agreement IC, the resistance can be to the high frequency signal that transmits to SOC from the USB port, avoid the high frequency signal because of the oscillation that the bifurcation produced, not only guaranteed USB2.0 data transmission's stability, also can make SCP agreement IC realize communicating with the adapter, detect the developments of adapter, can improve the charge strategy when the adapter is overheated. And the resistance can not only meet the SCP communication amplitude requirement, but also occupy small space and low cost for the PCB.

Description

Terminal device and charging system

Technical Field

The embodiment of the application relates to the technical field of terminals, in particular to a terminal device and a charging system.

Background

With the development of terminal technology, terminal devices are increasingly used. The terminal device generally includes a Universal Serial Bus (USB) port, and the USB port may support the terminal device to communicate with other devices, or may be used for charging the terminal device. For example, a four-wire interface may be used in a USB port, where two interfaces (e.g., D + and D-) are serial channels used to transfer data and the other two interfaces (e.g., VBUS and GND) are used for terminal device charging.

Generally, the USB charging mode and the communication mode operate independently, and whether the communication mode operates or not is not concerned in the USB charging mode, and whether the charging mode operates or not is not concerned in the USB communication mode.

However, in the charging process of the terminal device, the adapter may be overheated, and the terminal device cannot sense the overheat adapter, and the adapter may be damaged, or the communication quality of the terminal device may be affected.

Disclosure of Invention

The embodiment of the application provides a terminal device and a charging system, wherein a resistor is arranged between a D-port and an SCP protocol IC in series, and a resistor is arranged between a D + port and the SCP protocol IC in series, so that the stability of USB2.0 data transmission is ensured, the SCP protocol IC can be communicated with an adapter, the dynamic state of the adapter is detected, and a charging strategy can be improved when the adapter is overheated. And the resistance can not only meet the SCP communication amplitude requirement, but also occupy small space and low cost for the PCB.

In a first aspect, an embodiment of the present application provides a terminal device, including: the system comprises a super charging protocol SCP chip, a system-on-chip SOC, a universal serial bus USB port, a battery, a power management unit, a voltage stabilizer and an amplifier.

The USB port comprises a first data pin and a second data pin, the first data pin and the second data pin are respectively connected with the SOC, a first resistor is connected between the first data pin and the SCP chip in series, and a second resistor is connected between the second data pin and the SCP chip in series; the USB port is used for receiving charging input from the adapter and establishing communication connection between the adapter and the SCP chip; the SCP chip is used for receiving charging input from the USB port, recording the charging condition of the battery and acquiring the state of the adapter based on the first data pin and the second data pin; first and second resistors for isolating signals from the first and second data pins to the SOC and through the signals from the first and second data pins to the SCP chip; the SOC is used for obtaining the state of the adapter and the charging condition of the battery from the SCP chip and controlling a charging strategy of the battery according to the charging condition and the state; the power management unit is used for receiving the input of the battery and/or the SCP chip and managing the state of the battery; the voltage stabilizer is used for stabilizing voltage when power is supplied to a power consumption device of the terminal equipment; an amplifier for amplifying power when supplying power to a power consuming device of a terminal apparatus; the resistance value of the first resistor is any value from 300 omega to 800 omega, and the resistance value of the second resistor is any value from 300 omega to 800 omega.

The first data pin may be a D-pin of the USB port, the second data pin may be a D + pin of the USB port, the first resistor may be R1 in an embodiment, and the second resistor may be R2 in an embodiment.

According to the embodiment of the application, the resistor is arranged between the D-and the SCP protocol IC in series, the resistor is arranged between the D + and the SCP protocol IC in series, after verification, when the resistance value of the resistor arranged between the D-and the SCP protocol IC in series is any value of 300-800 omega, and the resistance value of the resistor arranged between the D + and the SCP protocol IC in series is any value of 300-800 omega, 480Mbps signals can be presented in a high impedance state on a path between the D +, the D-and the SCP protocol IC, so that signals transmitted to the SOC from the USB2.0 cannot oscillate, the stability of USB2.0 data transmission is guaranteed, the SCP protocol IC can be enabled to be communicated with the adapter, the dynamic state of the adapter is detected, and the charging strategy can be improved when the adapter is overheated. And the resistance can not only meet the SCP communication amplitude requirement, but also has small occupied space for the PCB and low cost.

In one possible design, the resistance may be 560 Ω or 330 Ω. Therefore, the resistor not only can play a role in blocking high-frequency signals, but also can meet the voltage amplitude requirement of an SCP protocol IC.

In one possible design, the state of the adapter may include one or more of: a temperature of the adapter, a charging current of the adapter, a charging power of the adapter, or a charging voltage of the adapter. In this way, the charging strategy can be adapted and improved depending on the state of the adapter.

In one possible design, the SOC is specifically configured to, when the USB port is connected to the adapter, read a charging current of the adapter, a charging power of the adapter, and/or a charging voltage of the adapter, and determine a charging mode according to the charging current of the adapter, the charging power of the adapter, and/or the charging voltage of the adapter, where the charging mode includes a super fast charging mode, a fast charging mode, or a normal charging mode. Therefore, when the terminal equipment is charged, the terminal equipment can be matched with a proper charging mode according to the state of the adapter, and a better charging effect is achieved.

In one possible design, the SOC is specifically configured to control the SCP chip to reduce the charging current of the battery or interrupt charging when the temperature of the adapter is determined to be greater than a threshold value. Thus, if the adapter is overheated, the terminal device can reduce the charging current of the battery or interrupt charging, and the terminal device and the adapter are protected from being damaged by overheating.

In a second aspect, an embodiment of the present application provides a charging system, including: an adapter and a terminal device.

The adapter includes a communication chip; the terminal device includes: the system comprises a super charging protocol SCP chip, a system-on-chip SOC, a universal serial bus USB port, a battery, a power management unit, a voltage stabilizer and an amplifier.

The USB port comprises a first data pin and a second data pin, the first data pin and the second data pin are respectively connected with the SOC, a first resistor is connected between the first data pin and the SCP chip in series, and a second resistor is connected between the second data pin and the SCP chip in series; the USB port is used for connecting the adapter, receiving charging input from the adapter and establishing communication connection between the communication chip and the SCP chip through the first data pin and the second data pin; the communication chip is used for obtaining the state of the adapter; the SCP chip is used for receiving charging input from the USB port, recording the charging condition of the battery and acquiring the state of the adapter based on the first data pin and the second data pin; first and second resistors for isolating signals from the first and second data pins to the SOC and through the signals from the first and second data pins to the SCP chip; the SOC is used for obtaining the state of the adapter and the charging condition of the battery from the SCP chip and controlling a charging strategy of the battery according to the charging condition and the state; the power management unit is used for receiving the input of the battery and/or the SCP chip and managing the state of the battery; the voltage stabilizer is used for stabilizing voltage when power is supplied to a power consumption device of the terminal equipment; an amplifier for amplifying power when supplying power to a power consuming device of a terminal device; the resistance value of the first resistor is any value from 300 omega to 800 omega, and the resistance value of the second resistor is any value from 300 omega to 800 omega.

In one possible design, the resistance may be 560 Ω or 330 Ω.

In one possible design, the state of the adapter may include one or more of: a temperature of the adapter, a charging current of the adapter, a charging power of the adapter, or a charging voltage of the adapter.

In one possible design, the SOC is specifically configured to, when the USB port is connected to the adapter, read a charging current of the adapter, a charging power of the adapter, and/or a charging voltage of the adapter, and determine a charging mode according to the charging current of the adapter, the charging power of the adapter, and/or the charging voltage of the adapter, where the charging mode includes a super fast charging mode, a fast charging mode, or a normal charging mode.

In one possible design, the SOC is specifically configured to control the SCP chip to reduce the charging current of the battery or interrupt charging when the temperature of the adapter is determined to be greater than a threshold value.

In the second aspect and the possible design of the second aspect, the effect is similar to that in the first aspect and the possible design of the second aspect, and is not described again here.

Drawings

FIG. 1 is a schematic diagram of a charging circuit in a possible implementation;

fig. 2 is a schematic diagram comparing a normal signal and an oscillation signal provided in an embodiment of the present application;

fig. 3 is a schematic diagram of a magnetic bead provided in an embodiment of the present application;

FIG. 4 is a schematic diagram of a charging circuit in a possible implementation;

FIG. 5 is a simplified hardware diagram illustrating communications between two devices in a USB communication mode according to an embodiment of the present disclosure;

fig. 6 is a simplified hardware diagram illustrating communications between an SCP protocol IC and an adapter in a USB charging mode according to an embodiment of the present application;

fig. 7 is a signal eye diagram provided in an embodiment of the present application;

fig. 8 is a schematic structural diagram of a terminal device according to an embodiment of the present application;

fig. 9 is a schematic view of a charging system according to an embodiment of the present application.

Detailed Description

The term "plurality" herein refers to two or more. The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter associated objects are in an "or" relationship; in the formula, the character "/" indicates that the preceding and succeeding related objects are in a relationship of "division".

It is to be understood that the various numerical references referred to in the embodiments of the present application are merely for convenience of description and distinction and are not intended to limit the scope of the embodiments of the present application.

It should be understood that, in the embodiment of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiment of the present application.

When the electric quantity of the terminal equipment is insufficient, the terminal equipment can be connected with the adapter on the basis of the USB port to realize wired charging. The state of the adapter may affect the charging of the terminal device, for example, the temperature of the adapter is too high, or the charging current of the adapter is too large, etc., which may cause damage to the adapter itself or the terminal device, or affect the communication quality of the terminal device.

Therefore, in some possible designs, a chip is also provided in the adapter, and the chip can obtain and record the state of the adapter and can communicate with the terminal device, wherein the state of the adapter may include one or more of the following: temperature of the adapter, charging current of the adapter, charging power of the adapter, charging voltage of the adapter, etc.

When the terminal device is charged with the adapter through the USB port in a wired mode, the terminal device can be in communication connection with a chip in the adapter, the terminal device can periodically acquire the state of the adapter through a data channel of the USB port, and therefore a charging strategy can be decided according to the state of the adapter.

In this way, the data channel of the USB port needs to be multiplexed, specifically, on one hand, the data channel of the USB port is used for data transmission between the adapter and the charging management chip of the terminal device in the terminal device charging mode; on the other hand, the data channel of the USB port is used for data transmission between the communication device connected to the terminal device and a System On Chip (SOC) of the terminal device in the terminal device communication mode. However, multiplexing of data channels of the USB port may cause data to be transmitted not only to the SOC but also to the charge management chip when data is transmitted between the terminal device and the communication device connected thereto in the communication mode.

By way of example, FIG. 1 illustrates a circuit schematic of USB port multiplexing. As shown in fig. 1, the terminal device may include a USB port 110, a System On Chip (SOC) 120, and a Super Charge Protocol (SCP) Integrated Circuit (IC) 130. The SCP protocol IC is one of the charging management chips, and the charging management chip may also be a charger (charger) chip, and the like, and the embodiment of the present application is not particularly limited.

The D-path of the signal from USB port 110 branches from cross point 11 into two branches, one branch going to SCP protocol IC130 and the other branch going to SOC. The D + path of the signal at USB port 110 branches from cross point 12 into two branches, one branch going to SCP protocol IC130 and the other branch going to SOC.

Data transmission between the adapter and the charging management chip adopts low-frequency communication, wherein the low frequency can refer to the specification of a common protocol, and for example, a signal of 30-300KHz can be called a low-frequency signal. Data transmission between a terminal device and a communication device connected to the terminal device is high-frequency communication, for example, signals above 3MHz may be referred to as high-frequency signals, and in the USB2.0 protocol, the data transmission rate is 480 MHz. The USB2.0 high frequency signal requires that no branch line can be present, otherwise the signal will oscillate, and fig. 2 shows a schematic diagram of the signal generating oscillation and generating distortion.

As shown in fig. 2, the normal signal is regular, and the high and low levels are stable. If the signal oscillates, the high and low levels of the oscillating signal are distorted, which may be irregular, which may cause the high level to be misread as a low level or the low level to be misread as a high level.

That is, signal oscillation may cause poor quality of data transmitted from the USB port to the SOC, which may interfere with data processing of the SOC. In a specific implementation, the interference may cause a phenomenon that the terminal device cannot recognize that the USB port has data to be transmitted when the USB port of the terminal device is connected to another device, or the terminal device cannot recognize that the USB port is connected to another device.

Therefore, the transmission path of the data channel of the USB port to the charge management chip can be controlled. For example, a low-pass frequency-resistant high-frequency device may be added to a transmission path from a data channel of the USB port to the charging management chip, so that it is possible to prevent a high-frequency signal from flowing to the charging management chip and the high-frequency signal from branching off, and thus the high-frequency signal transmitted from the USB port to the SOC does not oscillate, and influence on data processing of the SOC can be avoided.

Devices that pass low and block high frequencies are conceivable as beads, since beads have the property of passing low and block high frequencies.

Exemplarily, as shown in fig. 3, a schematic diagram of a characteristic curve of a magnetic bead is shown. Wherein the abscissa represents signal frequency in megahertz (MHz), and the ordinate represents resistance in ohms. The Z curve represents impedance, the R curve represents resistance, and the X curve represents reactance. Wherein Z ═ R + jX.

As can be seen from fig. 3, the magnetic beads have a larger impedance for high frequency signals of 10MHz to 1000MHz and a smaller impedance for low frequency signals.

Fig. 3 is only an example, and the impedance value of the magnetic bead at each frequency may be different in different cases, and the characteristic of passing low frequency and high frequency may be satisfied. For example, in the test of the embodiment of the present application, the impedance of the magnetic bead is 1.8K Ω at the 480MHz frequency point, and the impedance of the magnetic bead is 2.2 Ω at the low frequency point.

For example, fig. 4 is a schematic circuit diagram of USB port multiplexing in a possible design, and as shown in fig. 4, the terminal device may include a USB port 110, an SOC120, an SCP protocol IC130, a bead 140, and a bead 150.

Specifically, the USB port 110 may include: a Ground (GND) pin (not shown), a D-pin, a D + pin, and a Vbus pin (not shown).

The D-pin and the D + pin are respectively connected with the SOC, the magnetic beads 140 are connected between the D-pin and the SCP protocol IC130 in series, and the magnetic beads 150 are connected between the D + pin and the SCP protocol IC130 in series.

Therefore, high-frequency signals transmitted to the SOC by the D-pin and the D + pin are isolated by the magnetic beads 140 and the magnetic beads 150 and cannot enter the SCP protocol IC130 in a forked mode, and the communication quality of the USB port and the SCP protocol IC130 in the charging mode can be guaranteed.

However, the cost of the magnetic beads is high, and the occupied area of the circuit board when the magnetic beads are packaged is large.

The embodiment of the application takes a USB2.0 protocol as an example, and further analyzes the communication between the USB port and the SOC and the communication between the USB port and the SCP protocol IC.

Illustratively, fig. 5 shows a simplified hardware schematic of communication between two devices in a USB communication mode in which the USB ports of the devices communicate with their respective SOCs in the two devices connected by USB. The following description will take two USB-connected devices as a master device host and a slave device as an example. In the high-speed signal transmission of the USB2.0, 17.78mA driving current is generated at D-and D + by a driving current source, the D-and D + at both ends of host and device are 45 omega to the ground at both ends of the USB, and the transmission impedance on the bus to the ground is 22.5 omega.

By way of example, fig. 6 shows a simplified hardware schematic of the communication between the SCP protocol IC of the terminal device and the adapter in USB charging mode, in which SCP protocol IC is usually a logic control circuit, corresponding to the design of fig. 1, with magnetic beads connected in series between D-and D + of USB and SCP protocol IC, respectively. The magnetic beads function only to block the flow of D-and D + to the high frequency signal of the SCP protocol IC.

Based on this, the embodiment of the application sets a resistor in series between the D-and the SCP protocol ICs, and sets a resistor in series between the D + and the SCP protocol ICs, after verification, when the resistance value of the resistor in series between the D-and the SCP protocol ICs is any value between 300 omega and 800 omega, and the resistance value of the resistor in series between the D + and the SCP protocol ICs is any value between 300 omega and 800 omega, 480Mbps signals can be presented in a high impedance state on a path between the D +, the D-and the SCP protocol ICs, so that signals transmitted from the USB2.0 to the SOC cannot oscillate, and the stability of USB2.0 data transmission is ensured.

However, when the terminal device is in a charging mode and in a low-speed SCP protocol communication process, the resistors connected in series between D-and D + and the SCP protocol IC have a voltage division effect on signals, for example, in some scenes, the voltage amplitude of the SCP protocol IC is greater than 400mv, and it is verified that the resistances of the resistors connected in series between D-and D + and the SCP protocol IC are 300 Ω to 800 Ω, which can meet the voltage amplitude requirement of the SCP protocol IC, for example, when the resistances of the resistors connected in series between D-and D + and the SCP protocol IC are 560 Ω, the voltage amplitude of the SCP protocol IC is 470mv, and the distance between D-and D + and SCP protocol IC has a margin of 70mv, which meets the requirement. The voltage amplitude requirement of the SCP protocol IC can be met when the resistance values of the resistors respectively connected with the D-and the D + in series with the SCP protocol IC are 330 omega.

For example, fig. 7 shows an eye diagram of D-and D + transmitting high frequency signals when the resistances of the resistors respectively connected in series with the SCP protocol IC are 300 Ω -800 Ω. Wherein, the abscissa is time in units of microseconds S, and the ordinate is voltage amplitude in units of volts (V).

The high frequency signal of the embodiment of the present application satisfies the requirement that the signal in the eye pattern does not reach the upper limit region, the lower limit region, and the middle limit region, as shown in fig. 7.

Therefore, in this application embodiment, can change the magnetic bead in fig. 4 into resistance, resistance can not only satisfy SCP communication amplitude requirement, and is little to PCB's occupation space, and the cost is lower than the magnetic bead.

Exemplarily, fig. 8 shows a schematic hardware structure of a terminal device 300 according to an embodiment of the present application. In the terminal device 300, the USB ports are multiplexed.

As shown in fig. 8, the terminal device 300 may include: SCP protocol IC310, SOC320, USB port 330, battery (battery)340, Power Management Unit (PMU) 350, external low dropout regulator (LDO) 360, micro amplifier (smart PA)370, external amplifier RT-PA380, Liquid Crystal Display (LCD) 3901, camera (camera)3902, and one or more voice processing units (spakers) 3903. Among them, the USB port 330 may include: a D-pin and a D + pin. The D-pin and the D + pin are respectively connected with the SOC, a series resistor R1 is arranged between the D-pin and the SCP protocol IC310, and a series resistor R2 is arranged between the D + pin and the SCP protocol IC 310.

It is to be understood that the illustrated structure of the embodiment of the present application does not constitute a specific limitation to the terminal device 300. In other embodiments of the present application, the terminal device 300 may include more or fewer components than shown, or some components may be combined, some components may be split, or a different arrangement of components. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

The SCP protocol IC310 may also be understood as a charge management chip for receiving a charging input from a charger (or adapter). In some wired charging embodiments, SCP protocol IC310 may receive the charging input of the wired charger through USB port 330, and obtain the status of the charger through the USB port. The SCP protocol IC310 can also supply power to the terminal device through the PMU350 while charging the battery 340.

Where SOC320 may be a processor, SOC320 may include one or more processing units, such as: SOC320 may include an Application Processor (AP), a modem processor, a Graphics Processing Unit (GPU), an Image Signal Processor (ISP), a controller, a video codec, a Digital Signal Processor (DSP), a baseband processor, and/or a neural-Network Processing Unit (NPU), among others. Wherein, the different processing units may be independent devices or may be integrated in one or more processors.

The controller can generate an operation control signal according to the instruction operation code and the timing signal to complete the control of instruction fetching and instruction execution.

A memory may also be provided in SOC320 for storing instructions and data. In some embodiments, the memory in SOC320 is a cache memory. The memory may hold instructions or data that have just been used or recycled by SOC 320. If SOC320 needs to use the instructions or data again, it may be called directly from the memory. Avoiding repeated accesses reduces the latency of the SOC320, thereby increasing the efficiency of the system.

In some embodiments, SOC320 may include one or more interfaces. The interface may include an integrated circuit (I2C) interface, an integrated circuit built-in audio (I2S) interface, a Pulse Code Modulation (PCM) interface, a universal asynchronous receiver/transmitter (UART) interface, a mobile industry processor interface (mobile industry processor interface, MIPI), a general-purpose-input/output (GPIO) interface, a Subscriber Identity Module (SIM) interface, a bus or Universal Serial Bus (USB) interface, and the like.

The I2C interface is a bi-directional synchronous serial bus that includes a serial data line SDA and a Serial Clock Line (SCL). In some embodiments, SOC320 may include multiple sets of I2C buses. The SOC320 may couple the touch sensor, charger, flash, camera, etc. through different I2C bus interfaces, respectively. For example: the SOC320 may couple the touch sensor through an I2C interface, so that the SOC320 and the touch sensor communicate through an I2C bus interface, thereby implementing the touch function of the terminal device 300.

The I2S interface may be used for audio communication. In some embodiments, SOC320 may contain multiple sets of I2S buses. SOC320 may be coupled with voice processing unit 3903 via an I2S bus, enabling communication between SOC320 and voice processing unit 3903. In some embodiments, the voice processing unit 3903 can communicate audio signals to the wireless communication module via the I2S interface to enable answering a call via a bluetooth headset.

The PCM interface may also be used for audio communication, sampling, quantizing and encoding analog signals. In some embodiments, the voice processing unit 3903 and the wireless communication module may be coupled by a PCM bus interface. In some embodiments, the voice processing unit 3903 can also deliver audio signals to the wireless communication module through the PCM interface to implement a function of answering a call through a bluetooth headset. Both the I2S interface and the PCM interface may be used for audio communication.

The UART interface is a universal serial data bus used for asynchronous communications. The bus may be a bidirectional communication bus. It converts the data to be transmitted between serial communication and parallel communication. In some embodiments, a UART interface is generally used to connect SOC320 with a wireless communication module. For example: the SOC320 communicates with a bluetooth module in the wireless communication module through a UART interface to implement a bluetooth function. In some embodiments, the voice processing unit 3903 can transmit the audio signal to the wireless communication module through the UART interface, so as to implement the function of playing music through the bluetooth headset.

The MIPI interface may be used to connect SOC320 with peripheral devices such as a display screen and a camera. The MIPI interface includes a Camera Serial Interface (CSI), a Display Serial Interface (DSI), and the like. In some embodiments, SOC320 and camera 3902 communicate over a CSI interface, enabling the capture functionality of terminal device 300. The SOC320 and the display screen communicate via a DSI interface, and the display function of the terminal device 300 is realized.

The GPIO interface may be configured by software. The GPIO interface may be configured as a control signal and may also be configured as a data signal. In some embodiments, a GPIO interface may be used to connect SOC320 with camera 3902, a display screen, a wireless communication module, voice processing unit 3903, a sensor module, and the like. The GPIO interface may also be configured as an I2C interface, an I2S interface, a UART interface, a MIPI interface, and the like.

The USB port 330 interface is an interface conforming to the USB standard specification, and may specifically be a Mini USB port, a Micro USB port, a USB Type C interface, or the like. The USB port 330 may be used to connect a charger to charge the terminal device 300, and may also be used to transmit data between the terminal device 300 and peripheral devices. And the earphone can also be used for connecting an earphone and playing audio through the earphone. The interface may also be used to connect other terminal devices, such as AR devices and the like.

It should be noted that, in the embodiment of the present application, the D-pin and the D + pin of the USB port 330 are respectively connected to the SOC, the series resistor R1 is connected between the D-pin and the SCP protocol IC310, and the series resistor R2 is connected between the D + pin and the SCP protocol IC 310. Therefore, high-frequency signals transmitted to the SOC by the D-pin and the D + pin are isolated by the resistor R1 and the resistor R2 and cannot enter the SCP protocol IC310, low-frequency signals transmitted to the SCP protocol IC310 by the D-pin and the D + pin can be transmitted through the resistor R1 and the resistor R2, and therefore communication quality of the USB port 330 and the SCP protocol IC310 in a charging mode can be guaranteed, the occupied space of the resistor on the PCB is small, and the cost is lower than that of magnetic beads.

It should be understood that the interface connection relationship between the modules illustrated in the embodiment of the present application is only an exemplary illustration, and does not constitute a limitation on the structure of the terminal device 300. In other embodiments of the present application, the terminal device 300 may also adopt different interface connection manners or a combination of multiple interface connection manners in the above embodiments.

The PMU350, which may also be referred to as a power management module, is used to connect the battery 340, the SCP protocol IC310 and the SOC 320. The PMU350 receives input from the battery 340 and/or SCP protocol IC310 and provides power to the SOC320, internal memory, display, camera 3902, and wireless communication module, among other things. The PMU350 may also be used to monitor parameters such as battery capacity, battery cycle count, battery state of health (leakage, impedance), etc. In other embodiments, the PMU350 may also be placed in the SOC 320. In other embodiments, the PMU350 and SCP protocol IC310 may also be located in the same device.

The external LDO360 is used for stabilizing voltage of the terminal device, so that each power consuming device of the terminal device 300 obtains a stable voltage.

SmartPA370 and RT-PA380 are used for power amplification to provide operating power for the various power consuming devices of terminal device 300.

The display screen is used for displaying images, videos and the like. The display screen includes a display panel. The display panel may employ a Liquid Crystal Display (LCD) 3901, an organic light-emitting diode (OLED), an active-matrix organic light-emitting diode (active-matrix organic light-emitting diode, AMOLED), a flexible light-emitting diode (FLED), a miniature, a Micro-led, a quantum dot light-emitting diode (QLED), or the like. In some embodiments, the terminal device 300 may include 1 or N display screens, N being a positive integer greater than 1.

The terminal device 300 can implement a shooting function through an ISP, a camera 3902, a video codec, a GPU, a display screen, and an application processor.

The ISP is used to process data fed back by camera 3902. For example, when a photo is taken, the shutter is opened, light is transmitted to the camera photosensitive element through the lens, the optical signal is converted into an electrical signal, and the camera photosensitive element transmits the electrical signal to the ISP for processing and converting into an image visible to naked eyes. The ISP can also carry out algorithm optimization on noise, brightness and skin color of the image. The ISP can also optimize parameters such as exposure, color temperature and the like of a shooting scene. In some embodiments, the ISP may be provided in the camera 3902.

The camera 3902 is used to capture still images or video. The object generates an optical image through the lens and projects the optical image to the photosensitive element. The photosensitive element may be a Charge Coupled Device (CCD) or a complementary metal-oxide-semiconductor (CMOS) phototransistor. The photosensitive element converts the optical signal into an electrical signal, and then transmits the electrical signal to the ISP to be converted into a digital image signal. And the ISP outputs the digital image signal to the DSP for processing. The DSP converts the digital image signal into an image signal in a standard RGB, YUV and other formats. In some embodiments, the terminal device 300 may include 1 or N cameras 3902, N being a positive integer greater than 1.

The digital signal processor is used for processing digital signals, and can process digital image signals and other digital signals. For example, when the terminal device 300 selects a frequency bin, the digital signal processor is used to perform fourier transform or the like on the frequency bin energy.

Video codecs are used to compress or decompress digital video. The terminal device 300 may support one or more video codecs. In this way, the terminal device 300 can play or record video in a plurality of encoding formats, such as: moving Picture Experts Group (MPEG) 1, MPEG2, MPEG3, MPEG4, and the like.

The NPU is a neural-network (NN) computing processor that processes input information quickly by using a biological neural network structure, for example, by using a transfer mode between neurons of a human brain, and can also learn by itself continuously. The NPU can implement applications such as intelligent cognition of the terminal device 300, for example: image recognition, face recognition, speech recognition, text understanding, and the like.

The external memory interface may be used to connect an external memory card, such as a Micro SD card, to extend the storage capability of the terminal device 300. The external memory card communicates with the SOC320 through an external memory interface to implement a data storage function. For example, files such as music, video, etc. are saved in the external memory card.

The internal memory may be used to store computer-executable program code, which includes instructions. The internal memory may include a program storage area and a data storage area. The storage program area may store an operating system, an application program (such as a sound playing function, an image playing function, and the like) required by at least one function, and the like. The storage data area may store data (such as audio data, a phonebook, etc.) created during use of the terminal apparatus 300, and the like. In addition, the internal memory may include a high speed random access memory, and may further include a non-volatile memory, such as at least one of a magnetic disk storage device, a flash memory device, a Universal Flash Storage (UFS), and the like. The SOC320 executes various functional applications of the terminal device 300 and data processing by executing instructions stored in an internal memory and/or instructions stored in a memory provided in the processor.

The terminal device 300 may implement an audio function through the voice processing unit 3903, a speaker, a receiver, a microphone, an earphone interface, and an application processor. Such as music playing, recording, etc.

The speech processing unit 3903 is used to convert digital audio information into an analog audio signal output and also to convert an analog audio input into a digital audio signal. The speech processing unit 3903 may also be used to encode and decode audio signals. In some embodiments, the speech processing unit 3903 may be disposed in the SOC320, or portions of the functional modules of the speech processing unit 3903 may be disposed in the SOC 320.

The terminal device 300 may further include various sensors (not shown in the drawings) and the like. The embodiment of the present application does not limit the specific structure of the terminal device 300.

To sum up, the D-pin and the D + pin of the USB port 330 according to the embodiment of the present application are respectively connected to the SOC, the series resistor R1 is connected between the D-pin and the SCP protocol IC310, and the series resistor R2 is connected between the D + pin and the SCP protocol IC 310. Therefore, high-frequency signals transmitted to the SOC by the D-pin and the D + pin are isolated by the resistor R1 and the resistor R2 and then do not enter the SCP protocol IC310, the communication quality of the USB port 330 and the SCP protocol IC310 in the charging mode can be guaranteed, the occupied space of the resistor on the PCB is small, and the cost is lower than that of magnetic beads.

It should be noted that the SCP protocol IC in the embodiment of the present application may also be replaced by any other chip for charge management, which is not specifically limited in the embodiment of the present application.

The terminal device of the embodiment of the present application may be a device providing voice or data connectivity to a user, for example, a handheld device, a vehicle-mounted device, or the like having a wireless connection function. Currently, some examples of terminals are: a mobile phone (mobile phone), a tablet computer, a notebook computer, a palm computer, a Mobile Internet Device (MID), a wearable device, a Virtual Reality (VR) device, an Augmented Reality (AR) device, a wireless terminal in industrial control (industrial control), a wireless terminal in self driving (self driving), a wireless terminal in remote operation (remote local supply), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation security (transportation safety), a wireless terminal in city (city), a wireless terminal in smart home (smart home), a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a wireless local loop (wireless local) phone, a personal digital assistant (WLL) station, a handheld personal communication device with wireless communication function, a wireless terminal in industrial control (industrial control), a wireless terminal in transportation security (personal control), a wireless terminal in city (smart home), a wireless terminal in smart home (smart home), a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a wireless local loop (personal digital assistant (PDA) phone, a wireless local communication device with wireless communication function, a wireless communication device, a, The computing device or other processing devices connected to the wireless modem, the vehicle-mounted device, the wearable device, a terminal device in a 5G network or a terminal device in a Public Land Mobile Network (PLMN) for future evolution, and the like, which are not limited in this embodiment of the present application.

By way of example and not limitation, in the embodiments of the present application, the terminal device may also be a wearable device. Wearable equipment can also be called wearable intelligent equipment, is the general term of applying wearable technique to carry out intelligent design, develop the equipment that can dress to daily wearing, like glasses, gloves, wrist-watch, dress and shoes etc.. The wearable device may be worn directly on the body or may be a portable device integrated into the user's clothing or accessory. The wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction and cloud interaction. The generalized wearable smart device has full functions and large size, and can realize complete or partial functions without depending on a smart phone, for example: smart watches or smart glasses and the like, and only focus on a certain type of application functions, and need to be used in cooperation with other devices such as smart phones, such as various smart bracelets for physical sign monitoring, smart jewelry and the like.

In addition, in the embodiment of the present application, the terminal device may also be a terminal device in an internet of things (IoT) system, where IoT is an important component of future information technology development, and a main technical feature of the present application is to connect an article with a network through a communication technology, so as to implement an intelligent network with interconnected human-computer and interconnected objects.

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

In the embodiment of the present application, the terminal device or each network device includes a hardware layer, an operating system layer running on top of the hardware layer, and an application layer running on the operating system layer. The hardware layer includes hardware such as a Central Processing Unit (CPU), a Memory Management Unit (MMU), and a memory (also referred to as a main memory). The operating system may be any one or more computer operating systems that implement business processes through processes (processes), such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a windows operating system. The application layer comprises applications such as a browser, an address list, word processing software, instant messaging software and the like.

On the basis of the embodiment corresponding to fig. 8, the embodiment of the present application further provides a charging system. Illustratively, fig. 9 shows a charging system 500.

As shown in fig. 9, the charging system 500 includes the terminal device 300 and the adapter 400. The specific structure of the terminal device 300 may refer to the description of the embodiment corresponding to fig. 8, which is not limited herein. The adapter 400 may also be referred to as a charger, charging device, or the like.

The adapter 400 includes a communication chip 410 and a sensor 420 therein, the sensor 420 may include a temperature sensor, and the like, the communication chip 410 may obtain the status of the adapter 400 from the sensor 420 and may communicate with the terminal device 300, wherein the status of the adapter 400 may include one or more of the following: temperature of the adapter, charging current of the adapter, charging power of the adapter, charging voltage of the adapter, and the like.

When the terminal device 300 performs wired charging with the adapter 400 through the USB port 330, the SCP protocol IC310 in the terminal device 300 may establish a communication connection with the communication chip 410 in the adapter 400, and read the charging current of the adapter, the charging power of the adapter, or the charging voltage of the adapter, so that the terminal device 300 may select a charging mode according to the charging current of the adapter, the charging power of the adapter, or the charging voltage of the adapter, for example, the charging mode includes a super fast charging mode, a fast charging mode, or a normal charging mode. The charging efficiency of the super-fast charging mode, the fast charging mode or the common charging mode is reduced in sequence, and the charging current during charging is reduced in sequence.

The SCP protocol IC310 may periodically acquire the state of the adapter 400 based on the data channel of the USB port 330, the SCP protocol IC310 may further record the charging condition of the terminal device 300, and the SOC320 may acquire the state of the adapter 400 and the charging condition of the terminal device 300 from the SCP protocol IC310, so that the SOC320 may decide the charging policy according to the state of the adapter 400.

For example, when the SOC320 of the terminal device 300 acquires that the temperature of the adapter 400 is greater than a certain value and the terminal device 300 is in the charging state, the terminal device 300 controls the SCP protocol IC310 to adjust to a charging mode in which the charging current is low, or interrupts charging, or the like. The embodiment of the present application does not limit a specific charging strategy.

In this way, the charging strategy can be flexibly adjusted based on the state of the adapter 400 in the embodiment of the present application, and the problems that the adapter is damaged due to the situations such as overheating of the adapter, or the communication quality of the terminal device is affected, etc. can be solved. In addition, in the embodiment of the application, the high-frequency signals transmitted to the SOC by the D-pin and the D + pin are isolated by the resistor R1 and the resistor R2, and do not enter the SCP protocol IC310, so that the communication quality between the USB port 330 and the SOC in the charging mode can be ensured, and the resistor occupies a small space on the PCB and has a lower cost than a magnetic bead.

The above embodiments, structural diagrams or simulation diagrams are only schematic illustrations of the technical solutions of the present application, and the dimensional ratios thereof do not limit the scope of the technical solutions, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the above embodiments should be included in the scope of the technical solutions.

Claims

1. A terminal device, comprising: the system comprises a super charging protocol SCP chip, a system-on-chip SOC, a universal serial bus USB port, a battery, a power management unit, a voltage stabilizer and an amplifier;

the USB port comprises a first data pin and a second data pin, the first data pin and the second data pin are respectively connected with the SOC, a first resistor is connected between the first data pin and the SCP chip in series, and a second resistor is connected between the second data pin and the SCP chip in series;

the USB port is used for receiving charging input from an adapter and establishing communication connection between the adapter and the SCP chip;

the SCP chip is used for receiving charging input from the USB port, recording the charging condition of the battery and acquiring the state of the adapter based on the first data pin and the second data pin;

the first and second resistors for isolating signals from the first and second data pins to the SOC and through signals from the first and second data pins to the SCP chip;

the SOC is used for obtaining the state of the adapter and the charging condition of the battery from the SCP chip and controlling a charging strategy of the battery according to the charging condition and the state;

the power management unit is used for receiving the input of the battery and/or the SCP chip and managing the state of the battery;

the voltage stabilizer is used for stabilizing voltage when power is supplied to a power consumption device of the terminal equipment;

the amplifier is used for amplifying power when power is supplied to a power consumption device of the terminal equipment;

the resistance value of the first resistor is any value from 300 omega to 800 omega, and the resistance value of the second resistor is any value from 300 omega to 800 omega;

the status of the adapter may include one or more of: a temperature of the adapter, a charging current of the adapter, a charging power of the adapter, or a charging voltage of the adapter.

2. The terminal device of claim 1, wherein the resistance has a value of 560 Ω or 330 Ω.

3. The terminal device according to claim 1 or 2, wherein the SOC is specifically configured to, when the USB port is connected to the adapter, read a charging current of the adapter, a charging power of the adapter, and/or a charging voltage of the adapter, and determine a charging mode according to the charging current of the adapter, the charging power of the adapter, and/or the charging voltage of the adapter, where the charging mode includes a super fast charging mode, a fast charging mode, or a normal charging mode.

4. The terminal device of claim 3, wherein the SOC is specifically configured to control the SCP chip to reduce a charging current of the battery or to interrupt charging when the temperature of the adapter is determined to be greater than a threshold.

5. An electrical charging system, comprising: an adapter and a terminal device;

the adapter includes a communication chip;

the terminal device includes: the system comprises a super charging protocol SCP chip, a system level chip SOC, a universal serial bus USB port, a battery, a power management unit, a voltage stabilizer and an amplifier;

the USB port is used for connecting the adapter, receiving a charging input from the adapter and establishing communication connection between the communication chip and the SCP chip through the first data pin and the second data pin;

the communication chip is used for obtaining the state of the adapter;

the SOC is used for obtaining the state of the adapter and the charging condition of the battery from the SCP chip and controlling the charging strategy of the battery according to the charging condition and the state;

6. The charging system of claim 5, wherein the resistance is 560 Ω or 330 Ω.

7. The charging system according to claim 5 or 6, wherein the SOC is specifically configured to, when the USB port is connected to the adapter, read a charging current of the adapter, a charging power of the adapter, and/or a charging voltage of the adapter, and determine a charging mode according to the charging current of the adapter, the charging power of the adapter, and/or the charging voltage of the adapter, where the charging mode includes a super fast charging mode, a fast charging mode, or a normal charging mode.

8. The charging system of claim 7, wherein the SOC is configured to control the SCP chip to reduce the charging current of the battery or to interrupt charging, in particular when the temperature of the adapter is determined to be greater than a threshold value.