JP6196703B1 - Apparatus, electronic device and method for supplying electric power to electronic device - Google Patents

Abstract

An apparatus for supplying electric power to an electronic device is provided. A PC of a function expansion device is connected by cables. Receptacles 101 and 201 are connected, and receptacles 103 and 203 are connected. The set of receptacles 101 and 201 constitutes a first power lane, and the set of receptacles 103 and 203 constitutes a second power lane. The power of the AC / DC adapter 11 is supplied to the PC 200 through the first power lane and the second power lane. The function expansion device 100 and the PC 200 include an impedance adjustment circuit that adjusts currents shared by the first power lane and the second power lane, respectively. [Selection] Figure 1

Description

  The present invention relates to a technique for supplying electric power to an electronic device through a plurality of connectors.

  Electronic devices such as laptop computers and tablet terminals, and peripheral devices such as printers, external displays, and audio devices may use an AC / DC adapter as a power source. USB (Universal Serial Bus) is an interface that can transmit data signals and supply power with a single cable. Using USB, bus-powered electronic devices and peripheral devices can operate with the power supplied by the USB cable without using an AC / DC adapter.

  Patent Document 1 discloses an invention for supplying power to a USB connection type device using two USB ports provided in a computer. A normal USB cable including a signal line and a power supply line is connected to one of two connectors provided on the computer, and a cable for connecting only a power supply is connected to the other connector. Both cables are connected to each other by a connecting device in the cable. The connecting device includes a diode for preventing backflow and a fuse for maintaining a maximum current.

  Patent Document 2 discloses a USB cable device in which a main cable including a signal line and a power line and an auxiliary cable including only a power line are coupled to a drive cable by an auxiliary module. In the USB cable device, two connectors respectively connected to a main cable and an auxiliary cable are connected to two ports of a personal computer. The connection module includes a diode or a switch circuit for preventing backflow from the main cable to the auxiliary cable.

JP 2005-18717 A JP 2008-27114 A

  If the electronic device is equipped with a connector that can perform data transmission and power transmission at the same time as USB, the power jack can be eliminated, and the complexity of carrying and charging the AC / DC adapter in a mobile environment can be eliminated. it can. However, an interface that can perform data transmission and power transmission simultaneously, such as USB, has a limitation on the power capacity of the connector. Therefore, it is impossible to supply power from such a connector to a computer or peripheral device having a large power capacity.

  An object of the present invention is to solve one or more problems extracted from the background. A further object of the present invention is to provide a technique for supplying power exceeding the rated capacity using a general-purpose connector whose rated capacity is defined by the standard. Furthermore, the objective of this invention is providing the technique which implement | achieves data transmission and electric power transmission simultaneously. A further object of the present invention is to provide a technique for removing a power jack for connecting an AC / DC adapter from a device.

  A first aspect of the present invention provides an apparatus capable of supplying electric power to an electronic device. The apparatus is connected to the first receptacle of the electronic device while being connected to the first receptacle of the electronic device, and to the second receptacle of the electronic device while the first power lane supplies power. And a second power lane capable of supplying power. The first power lane may include a first connector that supplies power to the first receptacle, and the second power lane may include a second connector that supplies power to the second receptacle. An impedance adjustment circuit for adjusting the currents of the first power lane and the second power lane may be provided.

  The impedance adjustment circuit controls the current so that the first power lane and the second power lane share the transmission power at the same ratio with respect to the rated power of the first connector and the second connector, respectively. can do. The impedance adjustment circuit can control the current such that the first power lane and the second power lane transmit power within the respective rated power tolerances of the first connector and the second connector, respectively. .

  Power can be supplied from the first connector and the second connector at a rated voltage of an external power source that supplies power to the apparatus. The first connector and the second connector may include pins used for data transmission. At this time, the apparatus may transmit a data signal to and from the electronic device while supplying power to the electronic device. The first connector and the second connector may be USB Type-C connectors.

  A second aspect of the present invention provides an electronic device that can receive power from an external device. The electronic apparatus includes a power supply device that supplies power to the system device, a first connector provided in the housing, a first power lane that supplies power received by the first connector to the power supply device, and a housing. A second connector provided on the body; and a second power lane connected to the power supply device in parallel with the first power lane and supplying power received by the second connector to the power supply device.

  An impedance adjustment circuit that adjusts the ratio of current flowing in the first power lane and the second power lane may be provided. The impedance adjustment circuit can control the current so that the ratio of the shared power to the rated power of each of the first power lane and the second power lane is the same. The impedance adjustment circuit can control the impedance of the first power lane and / or the second power lane so that current does not flow backward from the first connector or the second connector. The first connector and the second connector may be USB Type-C connectors.

  According to the present invention, it is possible to provide an apparatus, an electronic apparatus, and a power supply method that have solved the above-described single or plural problems.

It is a functional block diagram for demonstrating a mode that the function expansion apparatus 100 and PC200 which is an example of an electronic device were connected. 2 is a functional block diagram for explaining an example of a function expansion device 100. FIG. It is a figure for demonstrating the pin structure of a Type-C receptacle. It is the functional block diagram which showed the electric power system of the function expansion apparatus 100 containing the impedance adjustment circuits 105 and 107 in detail. It is the functional block diagram which showed an example of the power circuit of PC200. 4 is a flowchart for explaining a procedure when power is supplied from the function expansion device 100 to the PC 200.

[Definition]
First, special terms used in this specification will be explained. The electronic device corresponds to an information terminal device such as a laptop computer, a tablet terminal, and a smartphone. The electronic device can be supplied with electric power from another device connected by a connector. However, the electronic device may be of a type that can receive power by connecting an AC / DC adapter or connecting directly to an outlet when the connector is not connected.

  The function expansion device corresponds to a device that extends the function of the electronic device by connecting to the electronic device with a cable. A function expansion device may be referred to as a docking station, port replicator, or dongle. The function expansion device includes a plurality of connectors for establishing a data channel between the peripheral device and the electronic device. The function expansion device supplies power to the electronic device.

  The peripheral device can be used by being connected to a connector provided on the housing of the electronic device or the function expansion device, and corresponds to a device including a specific function that functions by communicating with the electronic device such as recording, printing, and display. An HDD, a semiconductor memory, a printer, a display, and an HID (Human Interface Device) are examples of peripheral devices.

  The connector corresponds to a connecting device that can be attached and detached without using a tool. The connector means a composite of a plug corresponding to a male connection device and a receptacle (also referred to as a jack) corresponding to a female connection device. Usually, the receptacle is mounted on the electronic device and the plug is mounted on the cable, but it is not particularly necessary to limit the mounting location in the present invention. In application of the present invention, a receptacle mounted on an electronic device and a plug mounted on a peripheral device can be directly connected without interposing a cable.

[Overview]
FIG. 1 is a functional block diagram for explaining a state in which a function expansion device 100 and a personal computer (PC) 200 which is an example of an electronic device are connected. The function expansion device 100 is equipped with receptacles 101 and 103 for connecting the PC 200 to the housing and receptacles 111 and 113 for connecting the peripheral devices 131 and 151. The PC 200 is mounted with receptacles 201 and 203 for connecting the function expansion device to the casing.

  In one example, the receptacles 101, 103, 201, and 203 may be USB standard Type-C connectors. The receptacles 111 and 113 conform to the USB 3.1 standard in one example. However, the present invention does not require the connector standard to be limited to the USB standard. An AC / DC adapter 11 as a power source is connected to the power jack 115. The number of receptacles 111 and 113 is an example, and more receptacles may be provided, or receptacles of other standards may be provided.

  The receptacles 101 and 201 are connected by a cable 13 having plugs connected to both ends, and the receptacles 103 and 203 are connected by a cable 105 having plugs connected to both ends. The cables 13 and 15 can be directly connected by replacing the receptacles 101 and 103 with terminals. In the state of FIG. 1, the function expansion device 100 supplies the PC 200 with the power received from the AC / DC adapter 11 via the cables 13 and 15, and the PC 200 accesses the peripheral devices 131 and 135 through the connectors 201 and 203. be able to. The PC 200 can be charged with the power received from the receptacles 201 and 203 without providing a power jack.

  The rated voltage of the AC / DC adapter 11 is set to 20 V DC in one example. However, the function expansion device 100 can be connected to an AC / DC adapter having any other rated voltage. Since the receptacle 101 and the receptacle 201 are connected in series, it is desirable to have the same rated capacity. When the rated capacities are different, transmission power is regulated with a small rated capacity. The same applies to the rated capacities of the receptacles 103 and 203.

  The maximum power that can be supplied by the first set of receptacles 101 and 201 and the maximum power that can be supplied by the second set of receptacles 103 and 203 may be the same or different. When the rated capacities of the first set and the second set are the same, the function expansion device 100 can supply electric power twice as large as the rated capacity. In the present invention, the number of sets of the function expansion device 100 and the electronic device 200 can be increased to supply power more than three times the rated capacity of the receptacle.

[Power system]
FIG. 2 is a functional block diagram for explaining an example of the function expansion device 100. The receptacles 101 and 103 are Tx +/− and Rx +/− transmission lines used for USB 3.1 standard data transmission and D +/− transmission lines used for USB 2.0 standard data transmission, respectively. Connected to.

  The receptacles 101 and 103 are also connected to a PD (power delivery) controller 109 via a power (Vbus) line, a ground (GND) line, and a control (CC) line, respectively. Each Vbus line is connected to the power jack 115 via the impedance adjustment circuits 105 and 107. The PD controller 109 is connected to the impedance adjustment circuits 105 and 107 through a signal line, and is connected to the USB hubs 110 and 112 and the voltage regulator (VR) 115 through a power supply line.

  USB hubs 110 and 112 are connected to receptacles 111 and 113, respectively. The VR 115 has a primary side connected to the power jack 115 and a secondary side connected to elements of the function expansion device 100. The VR 115 supplies a voltage of 5 V to the PD controller 109 from the secondary side, and can also supply other voltages (for example, 3.3 V) used by the function expansion device 100 and peripheral devices. The AC / DC adapter 11 supplies power having a rated voltage of DC 20V to the power jack 115.

  The power supplied from the AC / DC adapter 11 is output from the receptacles 101 and 103 at the same rated voltage via the impedance adjustment circuits 105 and 107. Not limited to this example, the rated voltage of the AC / DC adapter 11 may be converted to a predetermined rated voltage, and power may be output from the receptacles 101 and 103. At this time, the voltage regulator for converting the voltage may be the same device or a different device.

[Type-C receptacle]
FIG. 3 is a diagram for explaining a pin configuration of the Type-C receptacle. FIG. 2 shows, with symbols, the 24 pins of pin numbers A1 to A12 and B1 to B12 and the uses defined for the receptacles 101, 103, 201, and 203 as viewed from the front. The receptacle has twelve pins each in two upper and lower stages. The pins defining the differential transmissions Tx1 +/−, Rx1 +/−, Tx2 +/−, and Rx2 +/− are used for data transmission of the USB 3.1 standard.

  The CC1 and CC2 pins are used for plug insertion direction, parameter detection for power supply through Vbus, identification of peripheral device ports, communication, and the like. The SBU pins 1 and 2 are used for data transmission in an alternate mode (alternate mode) instead of the standard data transmission of the USB 3.1 standard. The receptacle uses four Vbus pins and four GND pins for power transfer. The power that can be transmitted through the four Vbus pins is 100 W as an example. Therefore, the set of receptacles 101 and 201 and the set of receptacles 103 and 203 can supply a total of 200 W of power.

  In the USB 3.1 standard data transmission, only one differential transmission pair Tx / Rx of two differential transmission pairs Tx1 / Rx1 and Tx2 / Rx2 is used, and only one of the two differential transmissions D +/− is used. Therefore, the plug can be connected even if it is turned upside down (the right and left are turned up and down accordingly). The PC 200 periodically monitors the CC1 pin and the CC2 pin, and configures the receptacles 201 and 203 so that when the function expansion device 100 is connected, the vertical direction of the plug is determined and data can be transmitted correctly.

[Impedance adjustment circuit]
FIG. 4 is a functional block diagram showing in detail the power system including the impedance adjustment circuits 105 and 107. A power lane 141 is formed between the power jack 115 and the receptacle 101, and a power lane 143 is formed between the power jack 115 and the receptacle 103. The power lane 141 includes the impedance adjustment circuit 105 and the receptacle 101, and the power lane 143 includes the impedance adjustment circuit 107 and the receptacle 103. The impedance adjustment circuit 105 includes FETs 151 and 153, a current detector 159, and a voltage detector 161, and the impedance adjustment circuit 107 includes FETs 155 and 157, a current detector 163, and a voltage detector 165.

  The PD controller 109 controls the gate voltages of the FETs 151, 153, 155, and 157 to cut off the power lanes 141 and 143 and to control the impedance between the source and the drain. A bipolar power transistor may be used in place of the FET. The current detectors 159 and 163 detect the current flowing through the power lanes 141 and 143 and output the detected current to the PD controller 109.

  The voltage detectors 161 and 165 detect the output voltages of the power lanes 141 and 143 and output them to the PD controller 109. The PD controller 109 communicates with the PC 200 through the CC line and negotiates to determine power parameters. The PD controller 109 sends power from the receptacles 101 and 103 at the voltage and rated capacity negotiated with the PC 200. The PD controller 109 controls the gate voltages of the FETs 151, 153, 155, and 157 according to the outputs of the current detectors 159 and 163, and adjusts the ratio of the power output from the receptacles 101 and 103.

  When the rated capacities of the receptacles 101 and 103 are the same, the PD controller 109 can control the power transmitted by the power lanes 141 and 143 to be equal. Alternatively, the PD controller 109 initially minimizes the impedances of the impedance adjustment circuits 105 and 107, and when the power output by one approaches the rated capacity, the impedance of the power lane is increased and other power It can also be controlled to supply power from the lane.

  When the rated capacities of the receptacles 101 and 103 are different from each other, the PD controller 109 is configured so that the ratio of the power transmitted by the power lanes 141 and 143 to the rated capacities of the receptacles is the same. 107 can also be controlled. For example, when the rated capacity of the receptacle 101 is 100 W and the rated capacity of the receptacle 103 is 60 W, when a total of 80 W of power is sent at a certain moment, the power lane 141 sends 50 W of power and the power lane 143 is 30 W. Send power. The PD controller 109 can turn off the FETs 151, 153, 155, and 157 when the output voltages of the power lanes 141 and 143 deviate from the allowable values.

[PC]
FIG. 5 is a functional block diagram illustrating an example of a power circuit of the PC 200. The four Vbus pins of each of the receptacles 201 and 203 are connected to the system power supply 265 in parallel in the power lanes 241 and 243. The power lane 241 includes a receptacle 201 and an impedance adjustment circuit 242, and the power lane 243 includes a receptacle 203 and an impedance adjustment circuit 244. The impedance adjustment circuit 242 includes FETs 257 and 259, a current detector 253, and a voltage detector 251. The impedance adjustment circuit 244 includes FETs 261 and 263, a current detector 257, and a voltage detector 255.

  The PD controller 209 controls the gate voltages of the FETs 257, 259, 261, and 263 to cut off the power lanes 241 and 243, and controls the impedance between the source and the drain. The current detectors 253 and 257 detect the current flowing through the power lanes 241 and 243 and output the detected current to the PD controller 209. The voltage detectors 251 and 255 detect the input voltages of the power lanes 241 and 243 and output them to the PD controller 209.

  The PD controller 209 communicates with the function expansion device 100 through a CC line (not shown), and requests and negotiates parameters such as voltage and power. The PD controller 209 receives power from the receptacles 201 and 203 with the power and voltage negotiated with the function expansion device 100. When the function expansion device 100 and the PC 200 are connected by the cables 13 and 15, two power lanes connected in parallel from the power jack 115 of the function expansion device 100 to the primary side of the system power supply 265 are formed.

One power lane includes an impedance adjustment circuit 105, a receptacle 101, a receptacle 201, and an impedance adjustment circuit 242. The other power lane includes an impedance adjustment circuit 107, a receptacle 103, a receptacle 203, and an impedance adjustment circuit 244. Since the power jack 115 as a power source is common to the two power lanes, the two power lanes share the total power received by the system power supply 265.

  If there is a difference in impedance between two power lanes connected in parallel due to the effects of temperature, device characteristics, aging, etc., the difference in current sharing increases. For example, if the power lane 241 transmits 100 W of power and the power lane 243 transmits 50 W of power, the received power cannot be increased any more. The PD controller 209 can control the impedance adjustment circuits 242 and 244 so as to share the power received by the power lanes 241 and 243 at the same rate with respect to the rated capacities of the receptacles 201 and 203.

  The PD controller 209 can increase the impedance of the impedance adjustment circuit 242 or decrease the impedance of the impedance adjustment circuit 244 when the current flowing through the power lane 241 becomes larger than the current flowing through the power lane 243. . Alternatively, the PD controller 209 can perform both controls simultaneously. The impedance can be adjusted similarly when the magnitude of the current flowing through the power lanes 241 and 243 is reversed.

  In the function expansion device 100, the power sources of the power lanes 141 and 143 may be different. For example, in the present invention, the power lanes 141 and 143 can be connected to two independent DC / DC converters with the same rated voltage on the secondary side. In this case, in the PC 200, the power lanes 241 and 243 are connected in parallel to the system power supply 265. Therefore, if a difference occurs in the output voltage of the DC / DC converter, current flows from one receptacle 201 or 203. In some cases, the expansion device 100 may flow backward. On the other hand, the PD controller 209 can control the impedance adjustment circuits 242 and 244 to prevent the backflow of current.

  The PD controller 209 protects the system power supply 265 by turning off the FETs 257, 259, 261, and 263 when the received voltage exceeds an allowable value. The system power supply 265 can be composed of a DC / DC converter, a charger, a battery, and the like, and supplies power to the host system 267 of the PC 200 with a predetermined voltage. The host system 267 is configured by hardware such as a CPU, system memory, display, camera, and power controller installed in the PC 200, and software such as a device driver, OS, and application program.

[Operation procedure]
Next, the procedure for supplying power from the function expansion device 100 to the PC 200 will be described with reference to the flowchart of FIG. In FIG. 6, blocks 301 to 319 indicate the operation of the function expansion device, and blocks 401 to 419 indicate the operation of the PC 200. In the blocks 301 and 401, the cables 13 and 15 are not connected, and the power lanes 141, 143, 241, and 243 are off. An AC / DC adapter 11 is connected to the function expansion device 100. At blocks 303 and 403, for example, a first set of receptacles 101 and 201 is connected.

  Peripheral devices and electronic devices connected via the USB interface operate as a host (master) and the other as a device (slave) when connected, and one as a sink for receiving power and the other as a source for supplying power. Normally, devices corresponding to the peripheral devices 131 and 135 operate as a sink, and a host corresponding to the PC 200 operates as a source. In the present embodiment, the function expansion device 100 operates as a source and the PC 200 operates as a sink with respect to power supply. In addition, regarding data transmission, the PC 200 operates as a master, and the peripheral devices 131 and 135 operate as slaves.

  In blocks 303 and 403, the PD controller 109 and the PD controller 209 negotiate through the CC line. In block 305, the PD controller 109 supplies power to the Vbus pin of the receptacle 101 at a voltage of 5V. The PD controller 209 that has detected the voltage in the power lane 241 negotiates the one-system power supply with the function expansion device 100 and the CC line in blocks 307 and 407 when the PC 200 can receive power (100 W) in one system. .

  If the function expansion device 100 can meet the request of the PC 200, the voltage and power are negotiated. When the negotiation is completed, in block 309, the PD controller 109 turns on the FETs 151 and 153, and outputs power from the receptacle 101 at a rated voltage of 20V. The PD controller 209 that has detected a voltage having a rated voltage of 20 V on the power lane 241 in block 409 turns on the FETs 257 and 259 and supplies power to the system power supply 265. The PC 200 that has recognized the peripheral device 131 operates as a master and can access through the receptacle 201.

  The function expansion device 100 can supply power at a rated voltage of 20 V in the same procedure when another PC is connected to the receptacle 103. The PC 200 can also access the receptacle 203 by directly connecting peripheral devices. When the PC 200 requests power reception (200 W) in two systems, the function expansion device 100 can wait for power transmission until the second set of the receptacles 103 and 203 is connected. Blocks 311 and 411 connect the second set of receptacles 103 and 203. In blocks 311, 411, and 313, the function expansion device 100 outputs a voltage of 5 V from the receptacle 103 in the same procedure as the blocks 303, 403, and 305. The PD controller 209 that has detected a voltage of 5V on the power lane 243 negotiates two-system power supply through the CC line.

  When the mutual arrangement of voltage and power is completed in blocks 315 and 415, function expansion device 100 turns on FETs 155 and 157 in power lane 143 and outputs power at a rated voltage of 20V from receptacle 103 in block 317. The PD controller 209 that has detected a voltage of 20 V on the power lane 243 in block 417 turns on the FETs 261 and 263 and supplies power to the system power supply 265 from the power lanes 241 and 243. The PC 200 that has recognized the peripheral device 135 operates as a host and can access it.

  Since the power lane 241 and the power lane 243 are connected on the primary side of the system power supply 265, the power of the two paths is combined. In block 319, the PD controller 109 monitors the currents in the power lanes 141 and 143, and controls the impedance adjustment circuits 105 and 107 so that the power lanes 141 and 143 share the transmission power according to their ratings. . In block 419, the PD controller 209 monitors the voltage and current of the power lanes 241 and 243, and sets the impedance adjustment circuits 242 and 244 so that the power lanes 241 and 243 share the transmission power according to their respective ratings. Control.

  Although an example in which power is supplied from the function expansion device 100 to the PC 200 by two systems has been described, the present invention can provide three or more power lanes. For example, if three power lanes are provided, a total of 300 W can be transmitted in this example. At this time, the function expansion device 100 and the PC 200 can control the impedance control circuit so that the power supplied by each system does not exceed 100 W. Further, the PC 200 can control the impedance control circuit so that current does not flow backward from any system.

  The function expansion device 200 can be replaced with a device that includes a power source and a plurality of power lanes and does not transmit data. Such a device can remove the power jack connecting the AC / DC adapter from the PC 200. If Type-C is used for the connector of the apparatus, the PC 200 can directly connect a peripheral device to the connector.

  Although the present invention has been described with the specific embodiments shown in the drawings, the present invention is not limited to the embodiments shown in the drawings, and is known so far as long as the effects of the present invention are achieved. It goes without saying that any configuration can be adopted.

100 Function expansion device 200 PC
141, 143, 241, 243 Power lane 105, 107, 242, 244 Impedance adjustment circuit

Claims (15)

A device capable of supplying power to an electronic device,
A first power lane connected to the first receptacle of the electronic device and capable of supplying power;
A second power lane capable of supplying power by connecting to the second receptacle of the electronic device while supplying power from the first power lane;
An apparatus comprising: an impedance adjustment circuit that adjusts a current shared by the first power lane and the second power lane .   The first power lane includes a first connector for supplying power to the first receptacle, and the second power lane includes a second connector for supplying power to the second receptacle. Item 2. The apparatus according to Item 1. In the impedance adjustment circuit, the first power lane and the second power lane share transmission power at the same ratio with respect to the rated power of the first connector and the second connector, respectively. 3. The apparatus of claim 2 , wherein the current is controlled as follows. The impedance adjustment circuit transmits a current so that the first power lane and the second power lane transmit power within an allowable value of a rated power of each of the first connector and the second connector. The apparatus of claim 2 to be controlled.   The apparatus according to claim 2, wherein power is supplied from the first connector and the second connector at a rated voltage of an external power source that supplies power to the apparatus.   The apparatus according to claim 2, wherein the first connector and the second connector include pins used for data transmission. The device according to claim 6 , wherein the device transmits a data signal to and from the electronic device while supplying power to the electronic device.   3. The apparatus according to claim 2, wherein the first connector and the second connector are USB standard Type-C connectors. An electronic device capable of receiving power from an external device,
A power supply for supplying power to the system devices;
A first connector provided on the housing;
A first power lane for supplying power received by the first connector to the power supply;
A second connector provided in the housing;
A second power lane connected to the power supply device in parallel with the first power lane and supplying the power received by the second connector to the power supply device;
An electronic apparatus comprising: an impedance adjustment circuit that adjusts a ratio of a current flowing through the first power lane and the second power lane . 10. The electronic device according to claim 9 , wherein the impedance adjustment circuit controls current so that a ratio of shared power to rated power of each of the first power lane and the second power lane is the same. Claim 9, wherein the impedance adjusting circuit for controlling the first connector or the second said from the connector so that current does not flow back first power lane and the second power-lane or any one of the impedance The electronic device as described in. 10. The electronic apparatus according to claim 9 , wherein the first connector and the second connector are USB standard Type-C connectors. A device including a power source supplies power to a power supply device of an electronic device,
Connecting the first connector provided in the casing of the electronic device and the power supply device;
Connecting the second connector provided in the casing of the electronic device and the power supply device;
Connecting the first connector to the device;
Connecting the second connector to the device;
The device simultaneously supplying power from the first connector and the second connector;
Adjusting the current shared by the first connector and the second connector . The method according to claim 13 , further comprising a step of transmitting data between the electronic device and a peripheral device connected to the device through the first connector. A method for an electronic device to receive power,
Receiving power from a first connector provided in a casing of the electronic device;
Receiving power from a second connector provided in the housing while receiving power through the first connector;
Combining the power received through the first connector and the second connector to supply to a system device;
Adjusting the rate of current flowing through the first connector and the second connector .

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