KR20140113203A - Method for detecting capacity of charger for terminal and the terminal therefor - Google Patents

Abstract

Provided is a terminal comprising: a charging unit which receives a current from a charger to charge a battery, forms a current path for allowing a current up to a first level to flow according to control signals, and detects that an input voltage from the charger drops; a load unit which is branched from an input terminal of the charging unit to the ground so that the current inputted from the charger can be distributed, and forms a current path for allowing a current up to a second level to flow according to the control signals; and a controller which generates the control signals to set the first level current in the current path of the charging unit and set the second level current in the current path of the load unit, and performs detection of capacity of the charger based on the sum of the first level current and the second level current if the charging unit detects that the input voltage drops while the charger is connected to the charging unit.

Description

TECHNICAL FIELD [0001] The present invention relates to a method of detecting a capacity of a charger of a terminal,

More particularly, the present invention relates to a method of detecting a charging capacity of a terminal and a terminal thereof, and more particularly, to a charging circuit for charging a constant current, The present invention relates to a method for detecting a charging capacity of a terminal and a terminal thereof.

A terminal can be divided into a mobile / portable terminal and a stationary terminal depending on whether the terminal is movable or not. The mobile terminal can be divided into a handheld terminal and a vehicle mount terminal according to whether the user can directly carry the mobile terminal.

Such a terminal has various functions, for example, a communication function of voice, text, video and e-mail, as well as a function of shooting a picture or a moving picture, reproducing music or video file, And is implemented in the form of a multifunctional multimedia device having various functions.

In order to support and enhance the functionality of such terminals, it may be considered to improve the structural and / or software parts of the terminal.

In order to distinguish the abnormal charger from the conventional one, it is possible to find the proper charging current, to find the point where the input voltage of the charging IC drops while increasing the current, to set the proper charging current, and to distinguish between defective and equipment charger.

However, it is possible to classify the capacity of the charger in the constant current (CC) charge section, but it can not be distinguished in the constant voltage (CV) charge section in which the current decreases. The reason is that in the constant current charging period, the terminal can detect the capacity of the charger up to the current by drawing current from the charger, but it is impossible to detect the capacity of the charger from the terminal to the current drawn from the charger in the constant voltage charging section.

SUMMARY OF THE INVENTION The present invention is directed to a method of detecting a charged capacity of a terminal capable of detecting a permissible current of an applied charger by constituting a constant voltage charging section in which the current is reduced and a load circuit that produces the same conditions as the constant current charging section even after completion of charging, And to provide the terminal.

According to an aspect of the present invention, there is provided a battery charger comprising: a charger that receives a current from a charger to charge a battery; forms a current path through which a first maximum magnitude current flows according to a control signal; A charging section; A load unit that branches from an input terminal of the charging unit to ground to distribute a current input from the charger and forms a current path for flowing a maximum second magnitude current according to a control signal; And generating a control signal to set a first magnitude current in the current path of the charging unit and a second magnitude current in the current path of the load unit, And a controller for performing capacity detection of the charger based on a sum of the first magnitude current and the second magnitude current when a drop of the second magnitude current is detected.

The controller may detect the drop of the input voltage at the charging unit while increasing the second magnitude current set in the current path of the load unit to perform capacity detection of the charger.

Wherein the control unit determines whether the charger is connected to the charger unit or whether it is an electrostatic charging period or a positive pressure charging period and performs the capacity detection of the charger by setting the second magnitude current in the load unit only in the positive charging period .

Wherein the control unit determines whether the charger is connected to the charger and determines whether the charger is an electrostatic charge period or a positive charge period and blocks the current from being distributed to the load unit during the electrostatic charge interval, The capacity of the charger can be detected by detecting the drop of the input voltage.

The load unit may include a switching element for switching whether a current to be distributed to the load unit flows, and a resistance element corresponding to the set second magnitude current.

The load unit may be composed of a plurality of units corresponding to the increase of the set second magnitude current.

The load unit may be configured as one unit to adjust the current of the second magnitude flowing in the current path of the load unit corresponding to the set second magnitude.

According to another aspect of the present invention, there is provided a method of charging a battery, comprising: setting a maximum first magnitude current to flow in a current path of a charging unit that receives a current from a charger and charges a battery; Setting a maximum second magnitude current to flow in a current path of a load portion branched from an input terminal of the charging unit to the ground so that the current input from the charger can be distributed; And performing a capacity detection of the charger based on a sum of the first magnitude current and the second magnitude current when a drop of an input voltage is detected in the charger while the charger is connected to the charger, Is provided.

The performing of the charger capacity detection may detect the capacity of the charger by detecting the drop of the input voltage in the charger while increasing the second magnitude current set in the current path of the load.

The method further comprises determining whether the charger is connected to the charger to determine whether it is an electrostatic charge period or a static charge period; As a result of the determination, it is possible to perform the setting of the current path of the charging unit and the current path of the load unit in the case of the electrostatic charge section, and performing the capacity detection of the charger.

The method of detecting a charger capacity of the terminal may include: determining whether the charger is connected to the charger or an electrostatic charge interval or a constant pressure charging interval; Controlling the distribution of the current to the load unit to be blocked if the load is in the electrostatic charge section; Determining whether a voltage drop is detected in the charging unit while increasing the 1-magnitude current; And performing a capacity detection of the charger based on the first magnitude of current when a drop of an input voltage is detected in the charger while the charger is connected to the charger.

According to the present invention, it is possible to detect a charging capacity of a charger by determining a constant voltage charging period in which a current is reduced by making a forced load circuit and a permissible current of a charger applied even after completion of charging, and distinguish between fixtures and genuine products.

1 is a block diagram of a mobile terminal according to an embodiment of the present invention.
2 is a block diagram of a circuit for detecting the capacity of a charger in a mobile terminal according to an embodiment of the present invention.
3 is a flowchart illustrating a method of performing a method for detecting a capacity of a charger in a mobile terminal according to an exemplary embodiment of the present invention.
4 is a flowchart illustrating a method of performing a method for detecting a capacity of a charger in a mobile terminal according to another embodiment of the present invention.
5 is a flowchart illustrating a method of performing a method of detecting a capacity of a charger in a mobile terminal according to another embodiment of the present invention.
FIG. 6 is a graph illustrating a method for detecting a capacity of a charger in a full-charge period in a mobile terminal according to an exemplary embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The following embodiments are provided by way of example so that those skilled in the art can fully understand the spirit of the present invention. Therefore, the present invention is not limited to the embodiments described below, but may be embodied in other forms. In the drawings, the width, length, thickness, and the like of the components may be exaggerated for convenience. Like reference numerals designate like elements throughout the specification. The suffix "module" and " part "for the components used in the following description are given or mixed in consideration of ease of specification, and do not have their own meaning or role.

The mobile terminal described in this specification includes a mobile phone, a smart phone, a pad, a notebook, a tablet PC, a laptop computer, a digital broadcast terminal, a PDA (Personal Digital Assistants), a PMP And the like. However, it will be understood by those skilled in the art that the configuration according to the embodiments described herein may be applied to a fixed terminal such as a digital TV, a desktop computer, and the like, unless the configuration is applicable only to a mobile terminal.

1 is a block diagram of a mobile terminal according to an embodiment of the present invention.

1, a mobile terminal 100 according to an exemplary embodiment of the present invention includes a wireless communication unit 110, an audio / video (A / V) input unit 120, a user input unit 130, a sensing unit 140, An output unit 150, a memory 160, an interface unit 170, a control unit 180, and a power supply unit 190. The components shown in FIG. 1 are not essential, and a mobile terminal having more or fewer components may be implemented.

The mobile terminal 100 includes a multimode mobile terminal connected to at least two communication systems or at least two communication networks, and at least two communication systems or a multi-standby mobile terminal simultaneously accessing a communication network according to at least two operators .

Hereinafter, for convenience of description, a mobile terminal according to an embodiment of the present invention will be described as an example of a multi-standby mobile terminal. The multi-standby mobile terminal can be connected to three communication networks selected from a plurality of communication methods including Code Division Multiple Access (CDMA), Global System for Mobile Telecommunication (GSM), Wideband Code Division Multiple Access (WCDMA) Or in the case of the Republic of Korea, a mobile terminal that simultaneously connects to three communication networks selected from a plurality of operators including SKT, KTF, and LGT.

The wireless communication unit 110 may include one or more modules for enabling wireless communication between the mobile terminal 100 and the wireless communication system or between the mobile terminal 100 and the network in which the mobile terminal 100 is located. For example, the wireless communication unit 110 may include a broadcast receiving module 111, a mobile communication module 112, a wireless Internet module 113, a short range communication module 114, and a location information module 115 .

The broadcast receiving module 111 receives broadcast signals and / or broadcast-related information from an external broadcast management server through a broadcast channel. Here, the broadcast channel may include a satellite channel and a terrestrial channel. The broadcast management server may be a server for generating and transmitting broadcast signals and / or broadcast-related information, or a server for receiving broadcast signals and / or broadcast-related information generated by the broadcast server and transmitting the generated broadcast signals and / or broadcast- The broadcast signal may include a TV broadcast signal, a radio broadcast signal, a data broadcast signal, and a broadcast signal in which a data broadcast signal is combined with a TV broadcast signal or a radio broadcast signal.

The broadcast-related information may mean information related to a broadcast channel, a broadcast program, or a broadcast service provider. The broadcast-related information can also be provided through a mobile communication network. In this case, it may be received by the mobile communication module 112. Broadcast-related information can exist in various forms. For example, an EPG (Electronic Program Guide) of DMB (Digital Multimedia Broadcasting) or an ESG (Electronic Service Guide) of Digital Video Broadcast-Handheld (DVB-H).

The broadcast receiving module 111 may be a digital multimedia broadcasting (DMB-T), a digital multimedia broadcasting (DMB-S), a media forward link only (DVF-H) (ISDB-T), and digital broadcasting systems such as ISDB-T (Integrated Services Digital Broadcast-Terrestrial). Of course, the broadcast receiving module 111 may be configured to be suitable for other broadcasting systems as well as the digital broadcasting system described above.

The broadcast signal and / or broadcast related information received through the broadcast receiving module 111 may be stored in the memory 160.

The mobile communication module 112 transmits and receives radio signals to at least one of a base station, an external terminal, and a server on a mobile communication network. Here, the wireless signal may include various types of data depending on a voice call signal, a video call signal, or a text / multimedia message transmission / reception.

The wireless Internet module 113 is a module for wireless Internet access, and may be built in or externally attached to the mobile terminal 100. WLAN (Wi-Fi), Wibro (Wireless broadband), Wimax (World Interoperability for Microwave Access), HSDPA (High Speed Downlink Packet Access) and the like can be used as wireless Internet technologies.

The short-range communication module 114 refers to a module for short-range communication. Bluetooth, Radio Frequency Identification (RFID), infrared data association (IrDA), Ultra Wideband (UWB), ZigBee, and the like can be used as a short range communication technology.

The position information module 115 is a module for acquiring the position of the mobile terminal, for example, a Global Position System (GPS) module.

The A / V (Audio / Video) input unit 120 is for inputting an audio signal or a video signal and may include a camera 121 and a microphone 122. The camera 121 processes image frames such as still images or moving images obtained by the image sensor in the video communication mode or the photographing mode. The processed image frame can be displayed on the display unit 151. [

The image frame processed by the camera 121 may be stored in the memory 160 or transmitted to the outside through the wireless communication unit 110. [ Two or more cameras 121 may be provided depending on the use environment.

The microphone 122 receives an external sound signal through a microphone in a communication mode, a recording mode, a voice recognition mode, or the like, and processes it as electrical voice data. The processed voice data can be converted into a form that can be transmitted to the mobile communication base station through the mobile communication module 112 when the voice data is in the call mode, and output. Various noise reduction algorithms may be implemented in the microphone 122 to remove noise generated in receiving an external sound signal.

The user input unit 130 generates input data for a user to control the operation of the terminal. The user input unit 130 may include, for example, a key pad dome switch, a touch pad (static / static), a jog wheel, and a jog switch. The user input unit 130 may include an identification module selection switch for generating a selection signal for selecting an arbitrary identification module among a plurality of identification modules.

The sensing unit 140 senses the current state of the mobile terminal 100 such as the open / close state of the mobile terminal 100, the position of the mobile terminal 100, the presence or absence of user contact, the orientation of the mobile terminal, A sensing signal for controlling the operation of the mobile terminal 100 may be generated. For example, when the mobile terminal 100 is in the form of a slide phone, it is possible to sense whether the slide phone is opened or closed. It is also possible to sense whether the power supply unit 190 is powered on, whether the interface unit 170 is connected to an external device, and the like. The sensing unit 140 may include a touch sensor 141 and a proximity sensor 142, for example. The touch sensor 141 is a sensor for sensing a touch operation. For example, the touch sensor 141 may have the form of a touch film, a touch sheet, a touch pad, or the like.

The touch sensor 141 may form a mutual layer structure (hereinafter referred to as 'touch screen') with the display unit 151. The touch sensor 141 may be configured to convert a change in a pressure applied to a specific part of the display part 151 or a capacitance generated in a specific part of the display part 151 into an electrical input signal. The touch sensor 141 can be configured to detect not only the position and area to be touched but also the pressure at the time of touch.

If there is a touch input to the touch sensor 141, the corresponding signal (s) is sent to the touch controller. The touch controller processes the signal (s) and transmits the corresponding data to the controller 180. Thus, the control unit 180 can know which area of the display unit 151 is touched or the like.

The proximity sensor 142 may be disposed within an interior region of the mobile terminal or proximate to the touch screen that is enclosed by the touch screen. The proximity sensor 141 refers to a sensor that detects the presence of an object approaching a predetermined detection surface or an object existing in the vicinity thereof without mechanical contact using the force of the electromagnetic field or infrared rays. The proximity sensor 141 has a longer life than the contact type sensor and its utilization is also high.

Examples of the proximity sensor 142 include a transmission type photoelectric sensor, a direct reflection type photoelectric sensor, a mirror reflection type photoelectric sensor, a high frequency oscillation type proximity sensor, a capacitive proximity sensor, a magnetic proximity sensor, and an infrared proximity sensor. When the touch screen is electrostatic, it is configured to detect the proximity of the pointer by the change of the electric field along the proximity of the pointer. In this case, the touch screen (touch sensor) may be classified as a proximity sensor.

The term "proximity touch " refers to an act of causing the pointer to be located on the touch screen in proximity to the touch screen without the pointer touching the touch screen. "Contact touch" refers to the act of actually contacting the pointer on the touch screen. The position where the pointer is proximately touched on the touch screen means the position where the pointer corresponds vertically to the touch screen when the pointer is touched proximately.

The proximity sensor 142 detects a proximity touch and a proximity touch pattern (e.g., a proximity touch distance, a proximity touch direction, a proximity touch speed, a proximity touch time, a proximity touch position, a proximity touch movement state, and the like). Information corresponding to the detected proximity touch operation and the proximity touch pattern can be output on the touch screen.

The output unit 150 generates an output related to the visual, auditory or tactile sense and includes a display unit 151, an acoustic output module 152, an alarm unit 153, and a haptic module 154, (155), and the like.

The display unit 151 displays (outputs) information processed by the mobile terminal 100. For example, when the mobile terminal is in the call mode, a UI (User Interface) or a GUI (Graphic User Interface) associated with a call is displayed. When the mobile terminal 100 is in the video communication mode or the photographing mode, the photographed and / or received video or UI and GUI are displayed.

The display unit 151 may be a liquid crystal display (LCD), a thin film transistor-liquid crystal display (TFT LCD), an organic light-emitting diode (OLED), a flexible display display, and a 3D display.

Some of these displays may be transparent or light transmissive so that they can be seen through. This can be referred to as a transparent display, and a typical example of a transparent display is TOLED (Transparent OLED) and the like. The rear structure of the display unit 151 may also be of a light transmission type. With this structure, the user can see an object located behind the terminal body through the area occupied by the display unit 151 of the terminal body.

There may be two or more display units 151 according to the embodiment of the mobile terminal 100. For example, in the mobile terminal 100, a plurality of display portions may be spaced apart from one another, or may be disposed integrally with one another, and may be disposed on different surfaces, respectively.

The audio output module 152 may output audio data received from the wireless communication unit 110 or stored in the memory 160 in a call signal reception mode, a call mode or a recording mode, a voice recognition mode, a broadcast reception mode, The sound output module 152 also outputs sound signals related to functions (e.g., call signal reception sound, message reception sound, etc.) performed in the mobile terminal 100. [ The audio output module 152 may include a receiver, a speaker, a buzzer, and the like.

The alarm unit 153 outputs a signal for notifying the occurrence of an event of the mobile terminal 100. Examples of events that occur in the mobile terminal include call signal reception, message reception, key signal input, touch input, and the like. The alarm unit 153 may output a signal for notifying the occurrence of an event in a form other than the video signal or the audio signal, for example, vibration. The video signal or the audio signal may be output through the display unit 151 or the audio output module 152. Accordingly, the display unit 151 and the audio output module 152 may be classified as a part of the alarm unit 153. [

The haptic module 154 generates various tactile effects that the user can feel. A typical example of the haptic effect generated by the haptic module 154 is vibration. The intensity and pattern of the vibration generated by the hit module 154 can be controlled. For example, different vibrations may be synthesized and output or sequentially output.

In addition to the vibration, the haptic module 154 may include a pin arrangement vertically moving with respect to the contact skin surface, a spraying force or suction force of the air through the injection port or the suction port, a touch on the skin surface, contact with an electrode, And various tactile effects such as an effect of reproducing a cold sensation using an endothermic or exothermic element can be generated.

The haptic module 154 can be implemented not only to transmit the tactile effect through the direct contact but also to allow the user to feel the tactile effect through the muscular sensation of the finger or arm. At least two haptic modules 154 may be provided according to the configuration of the mobile terminal 100.

The memory 160 may store a program for the operation of the controller 180 and temporarily store input / output data (e.g., a phone book, a message, a still image, a moving picture, etc.). The memory 160 may store data related to vibrations and sounds of various patterns that are output upon touch input on the touch screen.

The memory 160 may be a flash memory type, a hard disk type, a multimedia card micro type, a card type memory (for example, SD or XD memory), a RAM (Random Access Memory), SRAM (Static Random Access Memory), ROM (Read Only Memory), EEPROM (Electrically Erasable Programmable Read-Only Memory), PROM A disk, and / or an optical disk. The mobile terminal 100 may operate in association with a web storage that performs storage functions of the memory 160 on the Internet.

The interface unit 170 serves as a path for communication with all external devices connected to the mobile terminal 100. The interface unit 170 receives data from an external device or supplies power to each component in the mobile terminal 100 or transmits data to the external device. For example, a wired / wireless headset port, an external charger port, a wired / wireless data port, a memory card port, a port for connecting a device having an identification module, an audio I / O port, A video input / output (I / O) port, an earphone port, and the like may be included in the interface unit 170.

The identification module 200 is a chip for storing various information for authenticating the use right of the mobile terminal 100 and includes a user identification module (UIM), a subscriber identity module (SIM) A Universal Subscriber Identity Module (USIM), and the like. Devices with identification modules (hereinafter referred to as "identification devices") can be manufactured in a smart card format. Accordingly, the identification device can be connected to the terminal 100 through the port.

The interface unit 170 may be a path through which the power from the cradle is supplied to the mobile terminal 100 when the mobile terminal 100 is connected to an external cradle or various command signals input from the cradle by the user, As shown in FIG. The various command signals or power from the cradle may be operated as a signal for recognizing that the mobile terminal 100 is correctly mounted on the cradle.

A controller 180 controls the overall operation of the mobile terminal. For example, the control unit 180 may perform related control and processing for voice call, data communication, video call, and the like. The control unit 180 may include a multimedia module 181 for multimedia playback. The multimedia module 181 may be implemented in the control unit 180 or may be implemented separately from the control unit 180. [

The power supply unit 190 receives external power and internal power under the control of the controller 180 and supplies power necessary for operation of the respective components.

The various embodiments described herein may be embodied in a recording medium readable by a computer or similar device using, for example, software, hardware, or a combination thereof.

According to a hardware implementation, the embodiments described herein may be implemented as application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays May be implemented using at least one of processors, controllers, micro-controllers, microprocessors, and other electronic units for performing other functions. In some cases, May be implemented by the control unit 180.

According to a software implementation, embodiments such as procedures or functions may be implemented with separate software modules that perform at least one function or operation. The software code may be implemented by a software application written in a suitable programming language. The software codes are stored in the memory 160 and can be executed by the control unit 180. [

2 is a block diagram of a circuit for detecting the capacity of a charger in a mobile terminal according to an embodiment of the present invention.

2, a mobile terminal 100 according to an embodiment of the present invention may include a charging unit 191, a load unit 192, and a controller 180.

The charging unit 191 may receive current from the charger 200 and charge the battery. The charging unit 191 may form a current path for flowing a maximum first magnitude current according to a control signal of the controller 180. [ The charging unit 191 may be implemented, for example, in the form of a charging IC.

The charging unit 191 may monitor an input voltage input from the charger 200. [ Accordingly, when the charging unit 191 detects that the input voltage is dropped, the controller 180 can generate an alarm.

The load unit 192 branches from the input terminal of the charging unit 191 to the ground GND so that the current input from the charger 200 can be distributed.

The load unit 192 may form a current path that allows a maximum second magnitude current to flow in accordance with the control signal of the controller 180.

The load unit 192 may be implemented by including a switching element 192a for switching whether a current to be distributed to the load unit 192 flows or not and a resistance element 192b corresponding to the set second magnitude current. The switching element 192a may be implemented as a bipolar transistor or a FET.

The load unit 192 may be configured as a plurality of units corresponding to the increase of the second magnitude current set by the controller 180. [

The load unit 192 may be configured as one unit to adjust a current of a second magnitude flowing in a current path of the load unit 192 in accordance with a second magnitude set by the controller 180.

The control unit 180 may generate the control signal to set the first magnitude current in the current path of the charging unit 191 and set the second magnitude current in the current path of the load unit 192. [ The control unit 180 determines that the charger 200 is connected to the charger 200 based on the sum of the first magnitude current and the second magnitude current when a drop of the input voltage is detected in the charger 191 while the charger 200 is connected to the charger 191. [ Capacity detection can be performed.

For example, the control unit 180 detects the drop of the input voltage in the charging unit 191 while increasing the second magnitude current set in the current path of the load unit 192, and performs the capacity detection of the charger 200 .

The control unit 180 can determine whether the charger 200 is connected to the charging unit 191 by a USB receptacle, for example, whether it is an electrostatic charge period or a static charge period. The control unit 180 can detect the capacity of the charger by setting the second magnitude current in the load unit 192 only in the case of the constant pressure charging period.

If the charger 200 is connected to the charger 191, the controller 180 may determine whether the charger 200 is in the electrostatic charge period or in the positive charge period.

As a result of the determination, the controller 180 blocks the current from being distributed to the load unit 192 during the electrostatic charge period. In addition, the control unit 180 may detect the drop of the input voltage in the charger 191 and perform the capacity detection of the charger 200 while increasing the first magnitude current set in the charger 191.

3 is a flowchart illustrating a method of performing a method for detecting a capacity of a charger in a mobile terminal according to an exemplary embodiment of the present invention.

Referring to FIG. 3, the controller 180 sets a maximum first magnitude current to flow in the current path of the charger 191 (S1). The charging unit 191 receives a current from the charger 200 and charges the battery.

In addition, the controller 180 sets a maximum second magnitude current to flow in the current path of the load unit 192 (S2). The load section 192 branches from the input terminal of the charger 191 to the ground so that the current input from the charger 191 can be distributed.

In a state where the charger 200 is connected to the charger 191, the controller 180 determines whether a drop of the input voltage is detected in the charger 191 (S3). The charging unit 191 may monitor whether the input voltage is dropped or not, and may determine whether the input voltage is dropped. The charging unit 191 may cause the controller 180 to generate an alarm indicating that a drop of the input voltage at which the drop of the input voltage is detected occurs.

If the drop of the input voltage is detected as a result of the determination, the controller 180 may perform capacity detection of the charger 200 based on the sum of the first magnitude current and the second magnitude current (S4).

Here, the controller 180 detects the drop of the input voltage in the charger 191 while increasing the second magnitude current set in the current path of the load unit 192 in order to perform the capacity detection of the charger 200 The capacity detection of the charger can be performed.

4 is a flowchart illustrating a method of performing a method for detecting a capacity of a charger in a mobile terminal according to another embodiment of the present invention.

4, when the charger 200 is connected to the charger 191, the controller 180 may determine whether the charger 200 is a constant current charging period or a constant voltage charging period (S11).

As a result of the determination, the controller 180 determines whether or not the current flowing through the charging unit 191 and the current flowing through the load unit 192, S12 and S13 corresponding to the setting steps S1 and S2, It is possible to perform S14 and S15 corresponding to steps S3 and S4 of performing the capacity detection of the charger.

5 is a flowchart illustrating a method of performing a method of detecting a capacity of a charger in a mobile terminal according to another embodiment of the present invention.

5, when the charger 200 is connected to the charger 191 as described in FIG. 4, the controller 180 determines whether the charger 200 is in the constant current charging period or the constant voltage charging period, (S21) so that the distribution of the current to the load unit 192 is blocked. For example, the controller 180 may set the first magnitude current to 100 mA.

The control unit 180 determines whether a voltage drop is detected in the charging unit 191 while increasing the first current set in the current path of the charging unit 191 (S22). The controller 180 may increase the first magnitude current to 500 mA starting at 100 mA.

The control unit 180 detects the drop of the input voltage in the charger 191 while the charger 200 is connected to the charger 191 and performs the capacity detection of the charger 200 based on the first magnitude current S23). For example, when the drop of the input voltage is detected when the first magnitude current is 500 mA, the controller 180 may determine the charge capacity of the charger 200 to be 500 mA.

FIG. 6 is a graph illustrating a method for detecting a capacity of a charger in a full-charge period in a mobile terminal according to an exemplary embodiment of the present invention.

Referring to FIG. 6, a section for performing charging in the mobile terminal 100 according to an embodiment of the present invention includes a constant current charging section (CC section) for performing constant current charging and a constant voltage charging section CV Section).

The mobile terminal 100 according to an exemplary embodiment of the present invention may perform charger capacity detection in both the constant current charging interval CC and the constant voltage charging interval CV.

In the constant-current charging section, the current must be maintained for the constant-current charging, so the voltage must keep rising. In order to supply the current constantly to the battery, the input voltage to be supplied must rise as much as the supplied battery voltage rises, so that the voltage difference remains constant and the voltage difference becomes constant The supply current can be kept constant.

For example, if the battery voltage is 3V and the voltage required to supply 700mA is 3.2V when the battery is being charged with a current of 700mA, if the voltage supplied is 0.2V higher than the battery voltage, the battery can be charged to 700mA.

As the battery continues to be charged, the voltage starts to rise at 3V, and the control unit 180 will continue to generate a voltage 0.2V higher than the battery voltage to supply 700mA. 700 mA is maintained.

However, if the battery is supplied with a voltage higher than 4.2V, the battery may be damaged. Therefore, when the battery is charged with a constant current and reaches 4.2 V, the voltage is not increased any more. In this case, the voltage is only charged up to 700mA until 4.2V supply. Since the supply voltage is maintained at 4.2V even after the battery voltage is gradually increased, the voltage difference of 0.2V is gradually reduced. When the voltage difference is reduced, . That is, the supply voltage is maintained from 4.2 V, and this period is referred to as a constant voltage section (CV section).

Accordingly, the controller 180 monitors the input voltage of the charger 191 in the CC section and the CV section. When the drop of the input voltage occurs, the controller 180 sets the first magnitude current set in the charger 191, The charging capacity of the charger 200 can be detected based on the sum of the second magnitude currents.

This is because the drop of the input voltage does not occur within the charge tolerance of the charger 200 at the input terminal of the charger 191 but the drop of the input voltage occurs when the charger 200 exceeds the charge tolerance of the charger 200.

The control unit 180 sets the maximum first magnitude current to 100 mA and the maximum second magnitude to the load unit 192 in order to check whether the charger 200 has a charging capacity of 500 mA. The current can be set to 400mA.

At this time, the resistance value of the resistance element 192b of the load unit 192 may be determined according to the second magnitude current set by the controller 180. [

For example, when the charger 200 determines whether the charger 200 has a charge capacity of 700 mA, the controller 180 sets the maximum first magnitude current to 100 mA in the charger 191, A maximum second-order current of 600 mA can be set.

At this time, the circuit configuration of the load section 192 may be implemented as a unit having a current path capable of flowing a current of 600 mA, and may include a first unit having a current path capable of flowing a current of 400 mA, And a second unit having a current path capable of flowing a current through the first unit.

When the charger 200 is connected to the terminal 100, the controller 180 checks whether the charger 200 has a charging capacity of 500 mA.

To this end, the controller 180 sets the maximum first magnitude current to 100 mA and the maximum second magnitude current to 400 mA in the charger 191.

The control unit 180 fixes the maximum first magnitude current flowing in the charging unit 191 at 100 mA in the CV section and instantaneously turns on the switching device 192a to make the current path so that the current flows. At this time, the controller 180 only detects a drop of the input voltage at the input terminal of the charger 191, so that the current flows in a short time.

The control unit 180 determines that the charge capacity of the charger 200 is 500 mA which is the sum of the first magnitude current 100 mA and the second magnitude current 400 mA when a drop of the input voltage is detected in the charger 191.

Meanwhile, if the drop of the input voltage is not detected in the charger 191, the controller 180 determines whether the charger 200 has a charge capacity of 700 mA.

To this end, the controller 180 sets the maximum first magnitude current to 100 mA and the maximum second magnitude current to 600 mA in the charger 191.

The control unit 180 fixes the maximum first magnitude current flowing in the charger unit 191 to 100 mA in the CV (Constant Voltage) period and instantaneously turns on the switching unit 192a to make the current path so that the current flows. At this time, the controller 180 only detects a drop of the input voltage at the input terminal of the charger 191, so that the current flows in a short time.

The control unit 180 determines that the charge capacity of the charger 200 is 700 mA which is the sum of the first magnitude current 100 mA and the second magnitude current 600 mA when a drop of the input voltage is detected in the charger 191.

The current flowing through the mobile terminal 100 is at least 100 mA to 200 mA even in the CV section in which the current is reduced. Therefore, a current of 100 mA set in the control unit 180 flows to the charging unit 191 at least. By doing so, the charging capacity of the charger 200 connected to the terminal 100 can be detected, and it becomes possible to distinguish whether it is the genuine charger or the equipment charger.

According to an embodiment of the present invention, the above-described method can be implemented as a code readable by a processor on a medium on which a program is recorded. Examples of the medium that can be read by the processor include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage, etc., and may be implemented in the form of a carrier wave (e.g., transmission over the Internet) .

The mobile terminal described above can be applied to not only the configuration and method of the embodiments described above but also all or some of the embodiments may be selectively combined so that various modifications may be made to the embodiments It is possible.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined by the equivalents of the claims and the claims.

For example, in an embodiment of the present invention, the load unit 192 is implemented using a switching device and a resistor device. However, in another embodiment, the load unit 192 may be implemented as a current feedback circuit, A current of various magnitudes may be set in the unit 192 and a current feedback signal flowing in the load unit 192 may be received and the capacity of the charger may be detected using the received current feedback signal.

Claims (11)

A charging unit that receives a current from a charger to charge a battery, forms a current path for flowing a maximum first magnitude current according to a control signal, and detects that an input voltage from the charger is dropped;
A load unit that branches from an input terminal of the charging unit to ground to distribute a current input from the charger and forms a current path for flowing a maximum second magnitude current according to a control signal; And
Wherein the control unit generates the control signal to set a first magnitude current in the current path of the charging unit and a second magnitude current in the current path of the load unit, And detecting a capacity of the charger based on a sum of the first magnitude current and the second magnitude current when a drop is detected. The apparatus of claim 1,
And a controller for detecting the drop of the input voltage in the charging unit while performing the capacity detection of the charger while increasing the second magnitude current set in the current path of the load unit. 2. The battery charger according to claim 1, wherein the control unit determines whether the charger is connected to the charger unit or whether it is an electrostatic charge period or a positive pressure charging period, and sets the second magnitude current to the load unit only in the positive- The capacity of the terminal is detected. 2. The battery charger according to claim 1, wherein the control unit determines whether the charger is connected to the charger unit or whether it is an electrostatic charge period or a constant-voltage charge period, blocks the current from being distributed to the load unit when the charger is in the electro- Wherein the charging unit detects the drop of the input voltage while increasing the current to perform the capacity detection of the charger. 2. The terminal according to claim 1, wherein the load section includes a switching element for switching whether a current to be distributed to the load section flows, and a resistance element corresponding to the set second magnitude current. 6. The terminal according to claim 5, wherein the load unit comprises a plurality of units corresponding to the set second magnitude current increase. 6. The terminal according to claim 5, wherein the load unit comprises one unit for adjusting the current of the second magnitude flowing in the current path of the load unit corresponding to the set second magnitude. Setting a maximum first magnitude current to flow in a current path of a charging unit that receives a current from the charger and performs battery charging;
Setting a maximum second magnitude current to flow in a current path of a load portion branched from an input terminal of the charging unit to the ground so that the current input from the charger can be distributed; And
Performing a capacity detection of the charger based on a sum of the first magnitude current and the second magnitude current when a drop of an input voltage is detected in the charger while the charger is connected to the charger; Charger capacity detection method. 9. The method of claim 8, wherein performing charger capacity detection comprises:
And detecting the drop of the input voltage in the charging unit while increasing the second magnitude current set in the current path of the load unit to perform capacity detection of the charger. 9. The method of claim 8,
Further comprising the step of determining whether the charger is connected to the charging unit or whether it is an electrostatic charging period or a constant pressure charging period;
Determining the current path of the charging unit and the current path of the load unit in the electrostatic charge period as a result of the determination; and performing capacity detection of the charger. 9. The method of claim 8,
Determining whether the charger is connected to the charger or whether it is an electrostatic charging period or a constant pressure charging period;
Controlling the distribution of the current to the load unit to be blocked if the load is in the electrostatic charge section;
Determining whether a voltage drop is detected in the charging unit while increasing the 1-magnitude current; And
Detecting a drop of an input voltage in the charger while the charger is connected to the charger, and performing capacity detection of the charger based on the first magnitude current.

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