Power supply control device and method for controlling power supply control device

Abstract

The invention provides a power supply control device and a control method of the power supply control device, which can control power supply from a power supply device having a USB terminal of Type-C standard to an electronic device with high precision even with a simple structure, and have excellent versatility. The power supply control device is provided with: a connector electrically connected to a power supply device; a connection establishment unit that controls the presence or absence of power supply; and an operation unit that switches connection / disconnection of the connection establishment unit with respect to the power supply device, the connector having a control-side CC terminal electrically connected to the power supply-side CC terminal of the power supply device, the connection establishment unit being configured so that the power supply device recognizes that the electronic device has been connected and supplies power to the electronic device, and the connection establishment unit being configured so that the power supply device is connected to the control-side CC terminal of the control-side CC terminal of the control-side CC terminal of the control-side CC terminal of the control-side CC terminal. When the operation unit is turned on, the power supply from the power supply device to the electronic device is turned on, and when the operation unit is turned off, the power supply from the power supply device to the electronic device is turned off.

Description

Technical Field

[0001] The invention relates to a power supply control device and a control method of the power supply control device.

[0002] In particular, the present invention relates to a power supply device and a control method for the power supply device, which can control the power supply from a power supply device having a USB (Universal Serial Bus) terminal of the Type-C standard to an electronic device with high accuracy even when no switch component is provided on the power line, and has excellent versatility. Background Art

[0003] In recent years, as electronic devices have become more sophisticated, the power consumption required to drive the electronic devices has also increased dramatically.

[0004] Under such circumstances, the number of power supply devices that supply power via a USB terminal conforming to the Type-C standard capable of supplying large amounts of power is increasing.

[0005] The reason is that by using the USB terminal of the Type-C standard, the versatility based on the unified standard is excellent, and the following further conveniences can be obtained: increased power supply (maximum 240W), easier control of power supply based on control signals, reduced heat loss, and expanded applications based on the increase in the number of connector terminals (24 pins).

[0006] On the other hand, the USB terminal of the Type-C standard can increase the supplied power through a control signal. Therefore, when the control device for turning on / off the electronic device is set on the power line, the supplied power may exceed the allowable power and cause damage.

[0007] Furthermore, in order to prevent such damage, when a control device is selected based on the maximum value of the power that can be supplied, not only does the control device become larger, but it also needs to be designed based on the power to be supplied, which leads to a problem of poor versatility.

[0008] Among them, various technologies for controlling a power supply device using a CC (Configuration Channel) terminal in a USB terminal of the Type-C standard have been proposed in the past.

[0009] As one example, a cable corresponding to the Type-C cable is disclosed, in which a switch section provided in a communication line can stop the power supply from a power supply device (see Patent Document 1).

[0010] More specifically, if Fig.10As shown in (a), a cable 300 includes a first connector 301, a second connector 302, a first power line 312 for power supply, a communication line 313, a control unit 303 connected to the communication line, a switch 304 provided on the communication line, and a first temperature detection unit 308 capable of detecting the temperature around the first connector 301.

[0011] Furthermore, the control unit 303 is configured to disconnect the communication line 313 when the first temperature becomes equal to or higher than a predetermined temperature so that power is not supplied between the power supply device and the electronic device via the first power line 312 .

[0012] In addition, as another example, Fig.10 As shown in (b) of FIG. 1 , a USB cable 410 is disclosed which includes a switch unit 418 ( 418 a , 418 b ) for releasing the sleep state of the power supply device 500 (see Patent Document 2).

[0013] More specifically, it is a USB cable 410, which includes: a first connector 411, which is connected to the power supply device 500 and has at least a VBUS terminal 411a, a GND terminal 411b, and a CC terminal 411c; and a second connector 413, which is connected to an electronic device 600 that is supplied with power from the power supply device 500. The USB cable 410 is characterized in that it has a switch unit 418, which switches the USB cable 410 from a non-connected state to a connected state relative to the power supply device 500, thereby releasing the power supply device 500 from a sleep state.

[0014] Furthermore, the configuration is such that the sleep state of the power supply device 500 can be canceled and the power supply device 500 can be put into the power supply state.

[0015] Prior art literature

[0016] Patent Literature

[0017] Patent Document 1: Japanese Patent Application Publication No. 2021-89604 (claims, drawings, etc.)

[0018] Patent Document 2: Japanese Patent Application Publication No. 2023-047269 (claims, drawings, etc.) Summary of the invention

[0019] 1. Technical issues to be resolved

[0020] However, the cable disclosed in Patent Document 1 is an invention of a safety device when the temperature of the connector is too high. Although the power supply can be stopped, the power supply device and the electronic device need to be temporarily reconnected in order to restart the power supply device.

[0021] Furthermore, although it is described that the power supply from the power supply device is stopped using the CC terminal, it is necessary to include a measuring device for measuring the temperature of the connector portion, and the entire circuit needs to be configured to be complicated.

[0022] That is, a power supply control device designed according to the power to be supplied is required, so there is a problem that it is complicated and has poor versatility, and it is difficult to control the on / off of electronic equipment with high accuracy with a simple structure.

[0023] Furthermore, the USB cable disclosed in Patent Document 2 is an invention for use with a power supply device having a sleep function, and does not take into account a power supply device without a sleep function.

[0024] That is, the structure is suitable for a power supply device having a sleep function, and sufficient consideration is not given to the versatility of highly-accurately controlling the power supply to electronic devices.

[0025] Therefore, without providing a switch component on the power line, it is actually impossible to switch the electronic device on / off and control the electronic device on / off while accurately controlling the power supplied from the power supply device to the electronic device.

[0026] Therefore, the inventors of the present invention conducted intensive research and found that by using the CC terminal in the USB terminal of the Type-C standard to control the power supply device, it is possible to control the on / off of the electronic device, thereby completing the present invention.

[0027] That is, according to the present invention, its purpose is to provide a power supply device and a control method of the power supply device, which can control the power supply from the power supply device having a USB terminal of the Type-C standard to the electronic device with high precision even if it has a simple structure and has excellent versatility.

[0028] (II) Technical solution

[0029] According to the present invention, a power supply control device is provided, which can solve the above-mentioned problem. The power supply control device turns on / off the power supply from a power supply device having a USB terminal of the Type-C standard to an electronic device, and comprises: a connector, which is electrically connected to the power supply device via the USB terminal; a connection establishment unit, which controls the presence or absence of power supply from the power supply device to the electronic device; and an operating unit, which switches the connection / disconnection of the connection establishment unit relative to the power supply device, wherein the connector has a control-side CC terminal electrically connected to the power supply-side CC terminal of the power supply device, the connection establishment unit is configured to electrically connect the control-side CC terminal to a ground point via a specified pull-down resistor, thereby allowing the power supply device to recognize that the electronic device has been connected and supply power to the electronic device, and is configured to, when the operating unit is set to an on state, turn on the power supply from the power supply device to the electronic device, and when the operating unit is set to an off state, turn off the power supply from the power supply device to the electronic device.

[0030] With this configuration, the power supply device can recognize that an electronic device serving as a power supply destination has been connected using the power supply-side CC terminal, and use this as a trigger to control the power supply device.

[0031] That is, by using a unified and standardized power supply-side CC terminal, it is not necessary to design in accordance with a VBUS terminal whose voltage varies according to the requirements of an electronic device electrically connected, and the presence or absence of power supply can be controlled with high accuracy.

[0032] Therefore, the versatility is excellent, and even with a simple structure, it is possible to control the power supply from the power supply device having the USB terminal of the Type-C standard to the electronic device with high accuracy.

[0033] In the power supply control device of the present invention, it is preferable that the operation unit includes a first switch member provided between the control-side CC terminal and the ground point.

[0034] By configuring in this way, it is possible to further reduce the size and to adopt a simpler structure.

[0035] In the power supply control device of the present invention, it is preferable that the operation unit includes a second switch member provided between a ground point in the power supply control device and a ground terminal in the electronic device.

[0036] With this configuration, even when there are a plurality of grounding points in the power supply control device, all of them can be collectively operated, and connection / disconnection between the ground potential of the power supply control device and the ground potential of the electronic device can be switched with high accuracy.

[0037] In addition, the power supply control device of the present invention is preferably configured to supply power with standard power based on the USB standard when it is identified that it is connected to an electronic device and when it is identified that a prescribed control signal is not input to the CC terminal on the power supply side, and the connection establishment unit is configured to cause the power supply device to supply standard power as an initial condition when the operating unit is switched from a disconnected state to an on state.

[0038] With this configuration, it is possible to prevent an accidental supply of an excessive voltage or the like, prevent a malfunction of the electronic device, and use the electronic device more safely.

[0039] Furthermore, for example, when the electronic device has an additional functional circuit such as a power supply condition generating circuit described later, the functional circuit can be activated more safely and stably using standard power.

[0040] In the power supply control device of the present invention, it is preferable that the connection establishing unit includes a power supply condition generating circuit that transmits a control signal instructing the power supply from the power supply device to the electronic device.

[0041] With this configuration, the electric power supplied from the power supply device can be controlled to a desired electric power with higher accuracy.

[0042] Furthermore, for example, power supply based on the PD standard, the QC standard, or the like, which is one of the fast charging standards, can be performed.

[0043] In the power supply control device of the present invention, when there are a plurality of power supply conditions indicating the electric power requested to the power supply device, the power supply condition generating circuit preferably has a plurality of different circuit patterns corresponding to the power supply conditions, respectively.

[0044] With this configuration, different connection conditions can be assigned to each circuit pattern, and different electric powers can be supplied with high accuracy depending on which circuit pattern is selected.

[0045] Furthermore, the power supply control device of the present invention is preferably configured such that, when the power supply condition generating circuit has a plurality of power supply conditions indicating power requested to the power supply device, the operating unit switches the power supply conditions in a predetermined order.

[0046] By configuring in this way, the switching mechanism of the connection condition can be made into a simpler structure.

[0047] In the power supply control device of the present invention, it is preferable that the connection establishing unit includes a notification unit that indicates whether the connection state is connected or disconnected with respect to the control-side CC terminal.

[0048] With this configuration, it is possible to recognize from the outside with higher accuracy whether power is being supplied from the power supply device or whether power supply is stopped.

[0049] In the power supply control device of the present invention, it is preferable that the connection establishing unit includes a testing unit that detects a voltage supplied from the power supply device to the electronic device.

[0050] With this configuration, it is possible to confirm with higher accuracy whether the electric power supplied from the power supply device is desired electric power.

[0051] Furthermore, for example, when the power supply control device includes a power supply condition generating circuit or the like, it is possible to confirm with high accuracy whether the power supplied from the power supply device matches the power supply condition, thereby using the power more safely.

[0052] In addition, the power supply control device of the present invention preferably has a sleep function that disconnects the power supply when the power supply is greater than a preset time and less than a specified threshold current, and the connection establishment unit has a wake-up circuit that causes the power supply device to supply a current exceeding the specified threshold current.

[0053] With this configuration, even when the electronic device is not used for a long period of time, it is possible to more effectively prevent the power supply device from entering the sleep state.

[0054] In addition, another aspect of the present invention is a control method of a power supply control device, which turns on / off the power supply from the power supply device having a USB terminal of the Type-C standard to an electronic device, characterized in that:

[0055] The power supply control device comprises: a connector electrically connected to the power supply device via a USB terminal; a connection establishment unit controlling the presence or absence of power supply from the power supply device to the electronic device; and an operation unit switching the connection establishment unit to the connection / disconnection of the power supply device.

[0056] The connector has a control-side CC terminal electrically connected to the power-supply-side CC terminal of the power supply device.

[0057] The control method of the power supply control device comprises the following steps (a1) to (a3) ​​and (b1) to (b3),

[0058] Step (a1): operating the operating unit to an on state, and electrically connecting the control-side CC terminal to a ground point via a predetermined pull-down resistor.

[0059] Step (a2): a step of causing the power supply device to recognize that the electronic device has been connected.

[0060] Step (a3): a step of supplying power from the power supply device to the electronic device.

[0061] Step (b1): operating the operating unit to the off state to release the pull-down of the CC terminal on the control side.

[0062] Step (b2): a step of causing the power supply device to recognize that the electronic device has been removed.

[0063] Step (b3): ​​a step of stopping the supply of electric power from the power supply device to the electronic device.

[0064] (III) Beneficial effects

[0065] By implementing this, it is possible to control the availability of power supply using a power supply side CC terminal of uniform specifications that is different from the VBUS terminal whose voltage varies according to the requirements of the electrically connected electronic device, thereby significantly reducing the risk of damage caused by insufficient allowable voltage of the switching component.

[0066] Therefore, it is possible to safely control the power supply from the power supply device to the electronic device without depending on the supplied power. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] Figure 1 This is a block diagram for explaining the relationship between the overview of the power supply control device of the present invention and the power supply device and the electronic device.

[0068] Figure 2 This is a block diagram showing an example in which a plurality of connectors are arranged in the power supply control device of the present invention.

[0069] Figure 3 (a) to (b) are block diagrams for illustrating an example of a configuration in which a connection establishing unit has a power supply condition generating circuit in the power supply control device of the present invention.

[0070] Figure 4 This is a block diagram for showing an example of a configuration in which a power supply condition generating circuit has a plurality of power supply conditions in the power supply control device of the present invention.

[0071] Figure 5 This is a block diagram for showing an example of a configuration in which a connection establishing unit includes a notification unit and a check unit in the power supply control device of the present invention.

[0072] Figure 6 This is a block diagram for showing an example of a configuration in which a connection establishing unit has a wake-up circuit in the power supply control device of the present invention.

[0073] Figure 7 (a) to (b) are block diagrams showing an example of a configuration in which an IC conforming to the USB PD standard is included in the power supply control device of the present invention.

[0074] Figure 8(a) to (b) are block diagrams for showing an example of a configuration including a second control unit for operating a power supply condition generating circuit, a capacitor serving as a power source for the second control unit, and a charging mechanism for charging the capacitor in the power supply control device of the present invention.

[0075] Fig. 9 This is a flowchart for showing an example of the operation of the power supply control device of the present invention.

[0076] Fig.10 (a) to (b) are diagrams for explaining a conventional power supply control device.

[0077] Description of reference numerals:

[0078] 10: power supply control device; 12: connector; 12a: control side CC terminal; 12b: control side VBUS terminal; 12c: control side GND terminal; 14: connection establishment part; 14a: pull-down resistor; 14b: grounding point; 16: operation part; 30: power supply device; 32: USB terminal; 32a: power supply side CC terminal; 32a': CC1 terminal; 32a'': CC2 terminal; 32b: power supply side VBUS terminal; 32c: power supply side GND terminal; 34: voltage detection part; 36: pull-up resistor; 38: supply control part; 50: electronic device; 52: device side connector; 52a: device side CC terminal; 52b: device side VBUS terminal; 52c: device side GND terminal. DETAILED DESCRIPTION

[0079] Hereinafter, embodiments of the present invention will be described with reference to the drawings as appropriate.

[0080] In the drawings used for explanation, the same components are denoted by the same reference numerals, and the explanation thereof may be omitted.

[0081] Moreover, the drawings used for explanation are schematically shown to the extent that these inventions can be understood, and the use devices, shapes, dimensions, materials, etc. described in the description are only preferred examples within the scope of the present invention. Therefore, the present invention is not limited to the following embodiments unless there is a special reason.

[0082] [First embodiment]

[0083] like Figure 1As illustrated, the power supply control device of the first embodiment is a power supply control device 10, which turns on / off the power supply from the power supply device 30 having a USB terminal 32 of the Type-C standard to the electronic device 50, and is characterized in that it comprises: a connector 12, which is electrically connected to the power supply device 30 via the USB terminal 32; a connection establishment unit 14, which controls the presence or absence of power supply from the power supply device 30 to the electronic device 50; and an operating unit 16, which switches the connection establishment unit 14 to the connection / disconnection with the power supply device 30, and the connector 12 has a power supply side of the power supply device 30. The CC terminal 32a is electrically connected to the control-side CC terminal 12a, and the connection establishing unit 14 is configured to electrically connect the control-side CC terminal 12a to the ground point 14b via a specified pull-down resistor 14a, so that the power supply device 30 recognizes that the electronic device 50 is connected and supplies power to the electronic device 50. In addition, when the operating unit 16 is set to the on state, the power supply device 30 is set to the electronic device 50 to supply power, and when the operating unit 16 is set to the off state, the power supply device 30 is set to the electronic device 50 to stop supplying power.

[0084] In addition, as an example, the power supply control device of the present invention is described as a circuit module assembled in an electronic device, but it can also be a circuit structure externally connected to the electronic device, a cable-type circuit structure, an adapter installed on the power supply device side, etc.

[0085] 1. Power supply device

[0086] The power supply device has a circuit configuration that outputs predetermined power to an electronic device described later through a power line connected to a power supply-side VBUS terminal serving as a power supply destination by connecting to the power supply control device.

[0087] That is, Figure 1 As shown, the power supply device preferably includes: a voltage detection unit 34 that measures the potential of the power supply side CC terminal 32a; a pull-up resistor 36 that controls the potential applied to the power supply side CC terminal 32a; and a supply control unit 38 that controls the power supply.

[0088] Specifically, the power supply device is preferably an AC adapter connected to an AC 100V outlet, a portable battery using a lithium battery or a gallium nitride battery, a car battery, a fuel cell, a solar or wind power generation device, or the like.

[0089] This is because such a power supply control device can be configured according to a common standard and thus has excellent versatility and can supply a predetermined amount of power with a simpler structure.

[0090] This is because a control signal transmitted from a power supply condition generating circuit described later can be appropriately received, and a predetermined power can be output according to the control signal, thereby more effectively preventing malfunction of the electronic device.

[0091] In addition, Figure 1 In the figures, for convenience, the integrated ground point 90 is shown in which the ground potential of the power supply control device 10 is set to the same potential as the ground potential of the electronic device 50 .

[0092] Furthermore, the power supply device preferably has a circuit configuration that measures the voltage of the power supply-side CC terminal to recognize the connection with the electronic device, and supplies or stops power based on the recognition.

[0093] That is, it is preferred that when the voltage detection unit of the power supply device measures the potential of the CC terminal on the power supply side and detects that the CC terminal on the power supply side is connected to the ground point (a terminal serving as the ground potential inside the power supply control device) via a circuit element having a specified resistance value, it is determined that the electronic device is in a connected state.

[0094] This is because, by adopting such a configuration, the on / off control of the power supply device can be more quickly performed.

[0095] In addition, in the power supply device, as a specific structure of the voltage detection unit, a voltmeter IC, a power meter IC, etc. are preferably used.

[0096] This is because, with such a configuration, the sleep state of the power supply device can be released with higher accuracy by the switch means described later, and the power supply device can be switched to the power supply state.

[0097] In addition, in the power supply device, the power supply value is based on the USB Type-C standard and is usually preferably within the range of 2.5 to 240 W.

[0098] The reason for this is that by having a function of supplying such power, it can be more generally used in general electronic devices.

[0099] Therefore, the power supply value of the power supply device is more preferably within the range of 5 to 150W, and further preferably within the range of 10 to 100W.

[0100] In addition, at this time, the supply voltage value of the power supply device is usually preferably within the range of 3.3 to 48V.

[0101] Furthermore, the power supply device is preferably configured to supply power using standard power based on the USB standard when recognizing that the electronic device is connected and recognizing that the control signal is not input to the power supply-side CC terminal.

[0102] This is because, by supplying power with standard power in this way, it is possible to prevent an excessive voltage from being accidentally supplied to the electronic device, and it is possible to more effectively prevent the occurrence of malfunctions in the electronic device.

[0103] In addition, it is usually preferred that the standard power in the power supply device be set to a value within the range of 1.5 to 24W.

[0104] This is because by setting the power value to such a value, it is possible to set the power to a value within the allowable voltage of electronic equipment that is generally used, thereby improving versatility.

[0105] Therefore, the standard power is more preferably set to a value within the range of 1.8 to 21 W, and further preferably set to a value within the range of 2 to 18 W.

[0106] In the power supply device, the standard voltage as the voltage component of the standard power is not particularly limited, but is usually preferably set to a value within the range of 3 to 8V.

[0107] This is because the voltage can be set to a value within the allowable voltage of commonly used electronic equipment, and the versatility can be further improved.

[0108] Therefore, the standard voltage is more preferably set to a value within the range of 3.5 to 7V, further preferably set to a value within the range of 4 to 6V, and particularly preferably set to 5V.

[0109] Furthermore, in the power supply device, it is preferable to provide an auxiliary power supply device in addition to the above-mentioned power supply device.

[0110] That is, when the power supply device is the first power supply device, it is preferable to arrange the second power supply device in parallel as an auxiliary power supply device, and switch the electrical connection of the power supply control device from the first power supply device to the second power supply device.

[0111] This is because by using two power supply devices in combination, when the main first power supply device stops, the second power supply device can be turned on more quickly.

[0112] Therefore, the second power supply device can be used as an emergency power supply device.

[0113] 2. Electronic equipment

[0114] The electronic device is electrically connected to the power supply device and is a DC driving device that is driven using predetermined power output from a USB terminal of the power supply device.

[0115] That is, Figure 1 As shown, it preferably includes: a device-side connector 52 that electrically connects the power supply device 30 and the electronic device 50, a ground terminal 54 that grounds the ground line, and a driving unit 56 that receives DC power based on the USB standard from the power supply device 30 and drives it.

[0116] Moreover, the device side connector 52 preferably has: a device side CC terminal 52a, a device side VBUS terminal 52b, and a device side GND terminal 52c that electrically connect the electronic device 50 to the power supply side CC terminal 32a, the power supply side VBUS terminal 32b, and the power supply side GND terminal 32c.

[0117] Specifically, the electronic device is preferably a fan (including a circulator), a ventilator, a heater, a cooler, a vacuum cleaner, a refrigerator, a heating box, a notebook PC, a lamp, a display, a radio, a television, an ultrasonic transmitter, a metal detector, a fish finder, a portable game console, a communication modem, a video disk player, an IC recorder, a measuring instrument, a laser oscillator, etc.

[0118] This is because such an electronic device can be driven with higher accuracy by the power supply control device.

[0119] In addition, in electronic devices, the power consumption required for driving is generally preferably a value within the range of 2.5 to 240 W based on the Type-C standard.

[0120] This is because, with such power consumption, the adapter can be driven within the allowable power range of the power supply control device, and an additional boosting circuit or the like is not necessary, so the adapter as a whole can be further miniaturized.

[0121] Therefore, the power consumption of the driven electronic device is more preferably a value within the range of 5 to 150 W, and further preferably a value within the range of 10 to 100 W.

[0122] 3. Connectors

[0123] The connector is a terminal component of the power supply control device that is electrically connected to the USB terminal of the power supply device.

[0124] That is, Figure 1 As shown, the connector 12 is characterized in that it has a control-side CC terminal 12 a that electrically connects the power supply control device 10 and at least the device-side CC terminal 52 a.

[0125] By providing the control-side CC terminal in this manner, a connection establishing section described later can be electrically connected, so that the power supply device recognizes that the electronic device is connected, and power is supplied from the power supply device to the electronic device.

[0126] Therefore, the connector is preferably a Type-C standard plug or socket.

[0127] This is because the power supply control device can be connected without using a conversion connector or the like, and the entire power supply control device can be further miniaturized.

[0128] In addition, if Figure 2 As shown, the connector 12 preferably has a control-side VBUS terminal 12 b that electrically connects the power supply control device 10 and the device-side VBUS terminal 52 b.

[0129] And, if Figure 2 As shown, the connector 12 preferably has a control-side GND terminal 12c for electrically connecting the power supply control device 10 and the device-side GND terminal 52c.

[0130] This is because, by providing such a terminal, a power line and a ground line can be introduced into the inside of the power supply control device via the control-side VBUS terminal and the control-side GND, thereby achieving further miniaturization.

[0131] This is because, when the power supply control device has a circuit element that requires power supply from the outside, it is possible to supply necessary power to the circuit element from the incoming power line or ground line.

[0132] In addition, if Figure 2 As shown, the connector 12 preferably includes, in addition to a first connector 12 ′ provided on the power supply device 30 side as the connector 12 , a second connector 12 ″ provided in series with the first connector 12 ′.

[0133] This is because, with such a configuration, the power supply device and the auxiliary circuit elements included in the electronic device can be electrically connected via the power supply control device.

[0134] Although not particularly shown in the drawings, it is preferable that an auxiliary switch means for switching connection / disconnection of the ground wire is provided in the power supply control device when the ground wire is introduced.

[0135] This is because by operating together with the operating unit, the on / off control of the power supply device can be more reliably performed.

[0136] Therefore, it is preferable that the power supply control device is configured to operate in conjunction with the on / off switching of the operating unit when the auxiliary switch means for the grounding line is provided.

[0137] 4. Connection establishment

[0138] (1) Basic structure

[0139] The connection establishing unit is a circuit configuration that allows the power supply device to recognize that the electronic device is connected, and controls the presence or absence of power supply from the power supply device to the electronic device.

[0140] That is, the control-side CC terminal is electrically connected to the ground point via a predetermined pull-down resistor, so that the potential of the power supply-side CC terminal is set to a predetermined potential, and the voltage detection unit determines that the potential has reached the predetermined potential, thereby recognizing that the electronic device is connected.

[0141] Specifically, if Figure 1 As shown, the connection establishing section 14 is characterized by including a pull-down resistor 14 a having a predetermined resistance value and a grounding point 14 b .

[0142] Here, if Figure 1 As shown in FIG. 1 , the ground point 14 b is a circuit element set to the same ground potential as the ground terminal 54 for grounding the ground line.

[0143] Furthermore, the connection establishing unit preferably includes a power supply condition generating circuit for supplying a predetermined power based on a USB quick charge standard.

[0144] This is because the power supply device can be made to output electric power in compliance with the quick charging standard, and thus the versatility of the power supply control device can be further improved.

[0145] This is because it is possible to output a predetermined amount of electric power based on a preset power supply condition, thereby more effectively preventing malfunction of the electronic device.

[0146] In addition, the connection establishing unit is preferably configured to supply standard power as an initial condition when an operation unit described later is switched from an OFF state to an ON state.

[0147] This is because, for example, when the electronic device has an additional functional circuit such as a power supply condition generating circuit described later, the functional circuit can be activated more stably using standard power.

[0148] This is because the power supply device receives a control signal from the power supply condition generating circuit immediately after startup, thereby preventing an accidental supply of an excessive voltage and the like, and more effectively preventing a malfunction of the electronic device.

[0149] (2) Pull-down resistor

[0150] The pull-down resistor is a circuit element that generates a divided voltage as a trigger for the voltage detection unit to recognize the connection by the pull-down resistor and the pull-up resistor of the power supply device, and has a predetermined resistance value.

[0151] That is, the resistance value of the pull-down resistor is preferably 1.2 kΩ or more.

[0152] This is because, by setting the resistance value to such a value, the potential measured by the voltage detection unit of the power supply device is stabilized, and erroneous detection due to measurement error or the like can be more effectively prevented.

[0153] On the other hand, when the resistance value is too high, the potential change of the CC terminal is too small and is easily affected by measurement errors. Therefore, it is more preferable to set the prescribed resistance value to a value within the range of 2 to 10 kΩ, and further preferably to a value within the range of 3 to 6 kΩ.

[0154] More specifically, it is particularly preferable that the resistance value of the pull-down resistor be set to 5.1 kΩ.

[0155] (3) Power supply condition generation circuit

[0156] The power supply condition generating circuit is a circuit structure that sends a control signal to the power supply device, the control signal being a control signal of a prescribed power value based on the USB PD (USB Power Delivery) standard or the QC standard, which is a fast charging standard.

[0157] That is, Figure 3 As shown in (a) to (b), the power supply condition generating circuit is preferably configured to have a built-in power supply condition generating circuit 60 that generates power supply conditions that comply with the USB PD standard, and is capable of outputting an electrical signal, i.e., a pulse train, corresponding to the desired power supply condition to the power supply device 30 via the control-side CC terminal 12a.

[0158] Furthermore, the power supply condition generating circuit 60 is preferably configured to be electrically connected to the power line via the pull-in resistor 58 and to be supplied with power.

[0159] Furthermore, the power supply condition generation circuit 60 is preferably configured to be electrically connected to the ground point 14 b via the pull-down resistor 14 a and recognized by the power supply device 30 as an internal resistance of the power supply condition generation circuit 60 .

[0160] More specifically, the power supply condition generating circuit is preferably constituted by a microcomputer, an emulator IC, or the like.

[0161] This is because, by adopting such a configuration, a control signal for instructing power supply can be transmitted with higher accuracy based on the quick charging standard.

[0162] In addition, in the power supply condition generating circuit, the power supply condition can be set by a conventional structure, but it is preferable to have a structure for programming a microcomputer, an emulator IC, etc. to send a control signal, a structure for sending a control signal based on a voltage divider resistance of a resistor, a structure for sending a control signal from an external device via I2C, UART, etc.

[0163] This is because, with such a configuration, it is possible to instruct the power supply device on a requested power value with higher accuracy.

[0164] In addition, if Figure 3As shown in (a) of FIG. 1 , it is preferable that the power supply condition generating circuit 60 is electrically connected to the power supply side CC terminal 32 a via at least the control side CC terminal 12 a .

[0165] On the other hand, Figure 3 As shown in (b) of FIG. 8 , it is also preferable that the power supply condition generating circuit 60 is connected to both the CC1 terminal and the CC2 terminal ( 52 a ′, 52 a ″).

[0166] This is because, by adopting such a configuration, a control signal can be transmitted to both the CC1 terminal and the CC2 terminal, and therefore the power supply control device can be arranged regardless of the orientation of the connector to be inserted into the power supply control device.

[0167] In addition, if Figure 2 As shown, when the electronic device 50 includes the power supply condition generating circuit 74 in addition to the power supply control device 10 , it is preferable that the power supply control device 10 includes the first connector 12 ′ and the second connector 12 ″.

[0168] This is because, by adopting such a configuration, the power supply condition generation circuit provided in the electronic device can be introduced into the power supply control device and used as the power supply condition generation circuit of the power supply control device.

[0169] (4) Standard power

[0170] Furthermore, the power supply condition generating circuit preferably outputs a control signal based on a difference between the desired supply power and the standard power.

[0171] Here, the standard power is a power value supplied when the power supply device recognizes that the electronic device is connected and recognizes that a control signal is not input to the power supply-side CC terminal.

[0172] That is, it is preferable to use the same method as the standard power in the above-mentioned power supply device.

[0173] 5. Operation Department

[0174] In addition, if Figure 1 As illustrated, the operation unit 16 is a switch member that switches connection / disconnection of the connection establishing unit 14 with respect to the power supply device 30 .

[0175] That is, the operating unit is a part that switches the state of the power supply control device relative to the power supply device between the connected state and the disconnected state by switching the on state and the off state, and is a switch component that switches the power supply of the power supply device on / off.

[0176] Specifically, the power supply side CC terminal can be turned on by setting the potential of the power supply side CC terminal to a value within the reference potential range via the control side CC terminal, and the power supply side CC terminal can be turned off by setting the potential of the power supply side CC terminal to a value different from the reference potential.

[0177] Here, the reference potential varies depending on the specifications of the power supply device, but it is preferred to set the GND terminal to the ground potential and the CC terminal to the potential when the resistance within the connection range (equivalent to the internal resistance in the case of an IC) identified by the voltage detection unit is connected to the ground point.

[0178] This is because, by setting such a reference potential, a power supply control device compliant with the Type-C standard can be configured with a simpler structure.

[0179] In addition, the operation portion is preferably configured to be in an OFF state when the connector is disconnected from the power supply device.

[0180] This is because it is possible to effectively prevent the operation unit from connecting the power supply device and the electronic device in the on state and accidentally supplying power.

[0181] Therefore, it is preferable that the configuration is such that when the connector is in the disconnected state, the pressing of the electromagnetic relay, the spring, the magnetic switch, etc. is released, whereby the operation portion returns to the off state.

[0182] Furthermore, the operation unit preferably includes a first switch member as a switch member provided between the control-side CC terminal and the ground point.

[0183] This is because, by setting such a configuration, the connection state of the connection establishing unit can be switched with a simpler configuration.

[0184] Here, if Figure 1 In the above description, the operation unit 16 is arranged between the control-side CC terminal 12a and the pull-down resistor 14a, but it is also preferable to arrange the operation unit 16 between the pull-down resistor 14a and the ground point 14b.

[0185] Furthermore, the operation section preferably includes a second switch member as a switch member provided between a ground point in the power supply control device and a ground terminal in the electronic device.

[0186] This is because, with such a configuration, even when there are a plurality of grounding points in the power supply control device, all of them can be collectively operated, and connection / disconnection between the ground potential of the power supply control device and the ground potential of the electronic device can be switched with high accuracy.

[0187] In addition, if Figure 3As exemplified in (a) to (b) of FIG. 1 , the operation unit is preferably provided between a circuit that electrically connects a ground line to the signal ground 54 ′ and electrically connects a ground point set at a different level from the signal ground 54 ′ to the signal ground 14 b ′.

[0188] This is because, when each ground point connected to the metal frame or the like is at the same level as the signal ground, the ground line is grounded, and therefore, all of the existing multiple ground points can be gathered in one place.

[0189] In addition, when the power supply device is a first power supply device, it is preferable that a third power supply device that supplies power to the operation portion is provided, which is different from the first power supply device.

[0190] Specifically, the switch member preferably has a lithium ion battery, an alkaline button battery, an alkaline dry battery, a solar panel, a piezoelectric element, a capacitor, or the like as the third power supply device.

[0191] This is because, when receiving power for driving the switch means from the power supply device, the power supply can be used as a power supply capable of supplying power independently of the power supply device.

[0192] In addition, the operation unit preferably includes a drive unit for controlling switching.

[0193] Specifically, the driving unit is a control device for controlling the driving of a switch member described later, and is preferably composed of a microcomputer, a PLC, an electromagnetic relay, or the like.

[0194] Furthermore, the driving unit is preferably driven based on a signal output from a temperature sensor, a current sensor, a voltage sensor, a wireless communication IC, or the like mounted on the driving unit.

[0195] This is because even when the switch is separated from the operating portion, a signal from a sensor, a wireless communication IC, or the like can be used as a trigger, thereby increasing the degree of freedom in the arrangement of the switch.

[0196] In addition, as the type of the operation unit, a contact switch or a non-contact switch is preferably used.

[0197] More specifically, as the contact switch, a rocker switch, a push switch, a tact switch, a slide switch, a rotary switch, a toggle switch, an electromagnetic relay switch, a plug switch, etc. are preferred.

[0198] In addition, as the contactless switch, a MOSFET (Metal-oxide-semiconductor field-effect transistor) switch, a solid-state switch, or the like is preferable.

[0199] The reason is that this type of switch is easy to obtain, assemble, and mass-produce.

[0200] 6. Structure example

[0201] (1) Structure Example 1

[0202] Furthermore, as Configuration Example 1, when the power supply condition generating circuit has a plurality of power supply conditions indicating power requested to the power supply device, it is preferable that the circuit has a plurality of different circuit patterns corresponding to the power supply conditions, respectively.

[0203] This is because different connection conditions can be assigned to each circuit pattern, and different electric powers can be supplied with higher accuracy depending on which circuit pattern is selected.

[0204] Specifically, if Figure 4 As shown in the example, it is preferable to include a power supply condition generating circuit 62 in which resistors 64a, 64b, 64c and an open end 64d electrically connected to a ground point and having different resistance values ​​are arranged in parallel.

[0205] Furthermore, it is preferable that the plurality of circuit patterns 64 be configured so as to be switchable by selecting any one of the circuit patterns through the operation unit 16 described later.

[0206] This is because, by changing the pull-down resistance value of the power supply condition generating circuit in this way, a control signal indicating the power supply condition corresponding to the resistance value can be transmitted to the power supply device.

[0207] On the other hand, Figure 4 As illustrated, in the power supply condition generating circuit 62, it is preferable that 66a to 66c electrically connected to the ground point and the open end 66d are arranged in parallel.

[0208] Furthermore, the ground pattern 66 is preferably configured to be switchable by selecting any one of the ground patterns through the operation unit 16 .

[0209] This is because by providing the ground pattern, it is possible to switch between the grounded state and the ungrounded state of the ground line, and when ungrounded, the power supply device and the power supply control device can be indirectly disconnected.

[0210] Furthermore, in the power supply condition generating circuit, it is preferable that the operating portion is configured to be linked by the circuit pattern and the ground pattern, and the open end of the circuit pattern and the open end of the ground pattern are arranged to coincide with each other.

[0211] This is because, by adopting a structure capable of such switching, even with a simpler structure, it is possible to change and stop the supplied power by operating a single operating unit.

[0212] Furthermore, when the operation unit is configured to be interlocked as described above, it is preferable that the ground line be electrically connected to a ground point having the same potential as that of the ground point in the power supply control device.

[0213] (2) Structure Example 2

[0214] Furthermore, when the power supply condition generating circuit has a plurality of power supply conditions indicating the power requested to the power supply device, the operating unit is preferably configured to switch the power supply conditions in a predetermined order.

[0215] This is because the switching mechanism of the connection condition can be made into a simpler structure.

[0216] Specifically, it is preferable to use a single push-type multi-contact switch and switch the power supply condition each time it is pushed.

[0217] (3) Structure Example 3

[0218] In addition, if Figure 5 As shown, the connection establishing unit preferably includes a notification unit 70 that indicates whether the control-side CC terminal 12 a is in a connected state or a disconnected state.

[0219] This is because it is possible to recognize with higher accuracy from the outside whether power is being supplied from the power supply device or whether power supply is stopped.

[0220] Specifically, the notification unit is preferably an LED, a liquid crystal, a buzzer, or the like.

[0221] In addition, Figure 5 , for convenience, a general ground point 90 ′ is shown in which the ground potential of the power supply control device 10 is set to the same potential as the signal ground 54 ′ of the electronic device 50 .

[0222] (4) Structure example 4

[0223] In addition, if Figure 5 As shown, the connection establishing unit 14 preferably includes a testing unit 72 that detects the voltage supplied from the power supply device 30 to the electronic device 50 .

[0224] This is because it is possible to confirm with higher accuracy whether the electric power supplied from the power supply device is the desired electric power.

[0225] This is because, when the power supply control device includes a power supply condition generating circuit or the like, it is possible to confirm with higher accuracy whether the power supplied from the power supply device matches the power supply condition.

[0226] Specifically, in addition to measurement by resistor voltage division, a power meter IC, a voltmeter IC, and the like are preferred.

[0227] And, if Figure 5 As shown, when the connection establishing unit 14 has a check unit 72, it is preferable to have a check control unit 68, which receives information from the check unit 72 and sends a control signal to a related circuit structure.

[0228] In this case, the inspection control unit is preferably a microcomputer, an emulator IC, or the like.

[0229] Although not specifically shown in the figure, when the power supply device has a function based on the QC standard which is a quick charging standard, it is preferred that the DP / DM terminals (sometimes referred to as D+ / D- terminals) of the power supply device have a voltage divider circuit based on the QC standard.

[0230] That is, the CC terminal is electrically connected to the ground point via a predetermined pull-down resistor as a connection establishment portion, and a predetermined voltage dividing circuit is provided, thereby enabling on / off control of the power supply device and voltage control based on the QC standard to be performed simultaneously.

[0231] The QC standard is a standard in which different voltages are applied to the DP terminal and the DM terminal of the USB terminal of the power supply device, so that the power supply device supplies a voltage based on the potential difference.

[0232] Although not particularly shown, when the connection establishing unit has an inspection unit, it preferably has a power adjustment unit that measures the difference between the power supplied from the power supply device and a preset power and corrects it in a manner that reduces the difference.

[0233] That is, the power adjustment unit is preferably configured to send a predetermined pulse signal to the power supply side CC terminal based on the preset power, and increase or decrease the output power by the predetermined power each time the pulse signal is sent.

[0234] Such a configuration can be realized by including a microcomputer or the like in a power control circuit.

[0235] This is because the output voltage of the power supply device can be adjusted with a resolution based on the number of pulse signals, and the output value in the power supply device can be more effectively prevented from deviating from a set value, and a predetermined power can be output.

[0236] In addition, when the connection establishing unit 14 has the checking unit 72, as shown in FIG. Figure 2 As shown, it is preferred to provide a first connector 12 ′ and a second connector 12 ″, and provide an inspection portion 72 a by introducing a power line passing therebetween.

[0237] This is because, with such a configuration, it is possible to measure the electric power supplied from the power line with high accuracy.

[0238] (5) Structure Example 5

[0239] In addition, if Figure 6 As shown, when the power supply device 30 has a sleep function that stops the power supply when the current is lower than a predetermined threshold value for a predetermined period of time, the connection establishment unit 14 preferably includes a wake-up circuit 80 that supplies a current exceeding the predetermined threshold value to the power supply device 30.

[0240] This is because even when the electronic device is not used for a long period of time, the power supply device can be prevented from entering the sleep state more effectively.

[0241] In a specific example, Figure 6 As shown, the wake-up circuit 80 is provided in the power supply control device 10 between the power line and the ground point, and is composed of a switch circuit 81 and a microcomputer 83. The microcomputer 83 outputs a drive pulse to the switch circuit 81 at a predetermined cycle.

[0242] The switch circuit 81 is turned on for a predetermined time in response to the drive pulse, so that a predetermined current flows through the power line.

[0243] That is, since the predetermined current is set to a current larger than a threshold current at which the power supply device 30 enters the sleep state, it is possible to effectively prevent the power supply device 30 from entering the sleep state.

[0244] Furthermore, the wakeup circuit preferably includes an on / off switch between the power line and the wakeup circuit so as to be able to switch between enabling and disabling the function of preventing the power supply device from entering the sleep state.

[0245] The wake-up circuit may be built into the power supply control device, but is preferably a box-type circuit that can be attached and detached in parallel with the power line.

[0246] This is because the configuration of the wake-up circuit can be changed according to the specifications of the power supply device, the electronic device, and the like.

[0247] (6) Structure Example 6

[0248] In addition, if Figure 7 As shown in (a) to (b) of FIG. 1 , the power supply control device of the present invention preferably electrically connects the eMarker chip 20 to any one of the power supply-side CC terminals 32 a (the CC1 terminal 32 a ′ and the CC2 terminal 32 a ″).

[0249] This is because by providing the eMarker chip in this way, after the power supply device is turned on, the supplied power can be changed within a prescribed range based on the fast charging standard.

[0250] For example, Figure 7As shown in (a), the CC1 terminal 32a' of the power supply device 30 is preferably electrically connected to the ground point 14b via the CC1 terminal 12a' of the power supply control device 10 and the pull-down resistor 14a.

[0251] Furthermore, it is preferable that the CC2 terminal 32 a ″ of the power supply device 30 is electrically connected to the eMarker chip 20 via the CC2 terminal 12 a ″ of the power supply control device 10 .

[0252] In addition, the structures of the CC1 terminal and the CC2 terminal may be swapped.

[0253] In addition, as another example, Figure 7 As shown in (b), the CC1 terminal 32a' and CC2 terminal 32a" of the power supply device 30 are preferably electrically connected to the ground point 14b via the CC1 terminal 12a' and CC2 terminal 12a" of the power supply control device 10 and the pull-down resistors 14a and 14c, respectively.

[0254] Furthermore, it is preferable that the eMarker chip 20 is provided between the CC2 terminal 32 a ″ of the power supply device 30 and the device-side CC2 terminal 52 a ″ of the electronic device 50 .

[0255] In addition, the structures of the CC1 terminal and the CC2 terminal may be swapped.

[0256] (7) Structure Example 7

[0257] In addition, if Figure 8 As shown in (a) to (b) of FIG. 1 , it is preferable to include a second control unit 69 that causes the power supply condition generating circuits 60 and 62 to perform predetermined operations such as starting and stopping.

[0258] This is because the degree of freedom in circuit design can be further increased by causing the power supply condition generation circuit to operate based on the second control unit.

[0259] That is, by operating the power supply condition generating circuit using the second control unit, wireless remote control and enhanced functionality through program control can be performed more efficiently.

[0260] Specifically, the second control unit is preferably a microcomputer, an emulator IC, or the like.

[0261] The operating unit is not particularly limited as long as it has a structure that switches the on / off state, but it is usually preferable to use an alternating switch that mechanically maintains the operated state.

[0262] This is because the use of the alternating switch enables the electronic device to be turned on and off more reliably.

[0263] On the other hand, when the power supply condition generating circuit is operated using the second control unit, it is also preferable to use a momentary switch.

[0264] This is because the use of momentary switches can further expand the degree of freedom in circuit design, making it easier to configure a circuit using switches such as touch panels.

[0265] More specifically, by turning on the momentary switch, self-maintenance can be performed based on the program recorded in the second control unit, and even when the momentary switch is turned off, the second control unit can be maintained in the on state.

[0266] In addition, if Figure 8 As shown in (a) to (b) of FIG. 6 , it is preferable to include a capacitor 76 for supplying electric power to the second control unit 69 .

[0267] This is because, by providing the capacitor in this manner, even when the power supply from the power supply device to the electronic device is stopped, the second control unit can be operated more efficiently using the power charged in the capacitor.

[0268] In addition, if Figure 8 As shown in (a) of FIG. 1 , when the power supply condition generating circuit 60 is connected to one device-side CC terminal 52 a , it is preferable to have a connection line 76 a for supplying a small amount of power supplied from the power supply-side CC terminal 32 a to the capacitor 76 .

[0269] This is because, by providing a connection line from the CC terminal to the capacitor, even when the electronic device continues to be unused, the capacitor can be always charged with a small amount of power supplied from the CC terminal.

[0270] Therefore, it is preferable that each connection line has a diode for preventing the power from flowing back from the capacitor to the power supply device.

[0271] It is known that such a minute amount of electric power is usually supplied in order to determine whether the power supply device is charging or supplying electric power.

[0272] In addition, if Figure 8 As shown in (a), it is preferable to include a connection line 76 b that supplies power supplied from the power line to the capacitor 76 and the second control unit 69 when the power supply condition generating circuit 60 is activated and power is supplied from the power supply device 30 .

[0273] This is because by directly connecting the power line to the capacitor and the second control unit in this way, if the power supply device is operating, the second control unit can also maintain operation.

[0274] Therefore, it is preferable that each connection line has a diode for preventing the backflow of electric power from the capacitor or the like.

[0275] In addition, if Figure 8 As shown in (b), when the power supply condition generating circuit 62 can select a plurality of power supply conditions and is connected to CC1 and CC2, it is preferable to have a connection line 76c and a connection line 76d, which respectively supply a small amount of power supplied from the CC1 terminal or the CC2 terminal to the capacitor 76.

[0276] This is because, by providing a connection line from the CC terminal to the capacitor, even when the electronic device continues to be unused, the capacitor can be always charged with a small amount of power supplied from the CC terminal.

[0277] Therefore, it is preferable that each connection line has a diode for preventing the backflow of electric power from the capacitor or the like.

[0278] In addition, if Figure 8 As shown in (b) of FIG. 7 , it is preferable to include a connection line 76 e for supplying power supplied from the power line to the capacitor 76 when the power supply condition generating circuit 62 is activated and power is supplied from the power supply device 30 .

[0279] This is because, by directly connecting the power line to the capacitor and the second control unit in this way, if the power supply device is operating, the second control unit can also maintain operation.

[0280] Therefore, it is preferable that each connection line has a diode for preventing the backflow of electric power from the capacitor or the like.

[0281] (8) Other structural examples

[0282] Furthermore, it is also preferable that a switch member is provided between the power supply side VBUS terminal and the device side VBUS terminal as a switch member in the power line, separately from the switch member in the above-mentioned operation unit.

[0283] That is, when the switch member in the operation portion is provided as the first switch member and the second switch member, it is preferable to provide a third switch member and use it together with at least one of the first switch member and the second switch member.

[0284] Specifically, the third switch member can be configured to have the same structure as the first switch member, and preferably a contact switch or a non-contact switch is used.

[0285] This is because the power supply can be stopped more reliably by using two switch means in combination.

[0286] Therefore, from the viewpoint of achieving a simpler structure, the two switch members are preferably configured to switch on and off in conjunction with each other.

[0287] [Second embodiment]

[0288] The control method of the power supply control device of the second embodiment enables the power supply from the power supply device having a USB terminal of the Type-C standard to the electronic device to be turned on / off, and is characterized in that the power supply control device comprises: a connector, which is electrically connected to the power supply device via the USB terminal; a connection establishment unit, which controls the presence or absence of power supply from the power supply device to the electronic device; and an operating unit, which switches the connection establishment unit relative to the power supply device. The connector has a control-side CC terminal electrically connected to the power supply-side CC terminal of the power supply device, and the control method of the power supply control device comprises the following steps (a1) to (a3) ​​and (b1) to (b3).

[0289] Step (a1): A step of operating the operating unit to an on state to electrically connect the control-side CC terminal to a ground point via a predetermined pull-down resistor.

[0290] Step (a2): a step of causing the power supply device to recognize that the electronic device has been connected.

[0291] Step (a3): a step of supplying electric power from the power supply device to the electronic device.

[0292] Step (b1): a step of operating the operating unit to an OFF state to release the pull-down of the control-side CC terminal.

[0293] Step (b2): a step of causing the power supply device to recognize that the electronic device has been removed.

[0294] Step (b3): ​​a step of stopping the supply of electric power from the power supply device to the electronic device.

[0295] 1. Pre-process

[0296] The present invention Fig. 9 As shown in the figure mark S1, it is preferable to have a process of electrically connecting the power supply device to the electronic device and electrically connecting the connector of the power supply control device to the power supply device as a previous process.

[0297] At this time, the operation unit of the power supply control device may be in either an on state or an off state, but is preferably connected in an off state.

[0298] This is because, by connecting the operating unit of the power supply control device in the disconnected state, it is possible to effectively prevent the power supply from the power supply device to the electronic device from being accidentally supplied during connection.

[0299] 2. Process (a1)

[0300] like Fig. 9 Indicated by reference numeral S2 in FIG. 1 , step ( a1 ) is a step of switching the operation unit to an on state.

[0301] Specifically, for example, when the operation unit includes a switch member, it is preferable to operate the switch member to electrically connect the control-side CC terminal to the ground point.

[0302] This is because by implementing in this way, switching can be performed with a simpler structure.

[0303] 3. Process (a2)

[0304] like Fig. 9 As indicated by reference numeral S3 in FIG. 1 , step (a2) is a step of placing the connection establishing unit in a connected state with respect to the power supply device, and allowing the power supply device to recognize that the electronic device has been connected.

[0305] Specifically, the control-side CC terminal is preferably electrically connected to the ground point via a predetermined pull-down resistor, the potential of the power supply-side CC terminal is set to a predetermined potential, and the voltage detection unit determines that the potential has reached the predetermined potential, thereby recognizing that the electronic device is connected.

[0306] This is because, by implementing this, the potential of the power supply-side CC power supply device can be set to a predetermined range via the control-side CC terminal, and the power supply device can be controlled with higher accuracy without depending on the supplied power.

[0307] 4. Process (a3)

[0308] like Fig. 9 As shown by reference numerals S4 to S5 in FIG. 1 , step (a3) ​​is a step of supplying electric power from the power supply device to the electronic device to drive the electronic device.

[0309] Specifically, when the voltage detection unit determines that the electronic device is connected, it is preferable that the voltage detection unit transmits a signal to the supply control unit to permit supply of a predetermined amount of electric power.

[0310] Furthermore, it is preferable that the supply control unit, which has received the permission signal, turns on the power supply device to supply predetermined power through the USB terminal.

[0311] This is because, by doing so, the supply control unit can allow the power supply device to quickly recognize that the power supply device is connected, thereby being able to supply the specified power more safely and stably.

[0312] Furthermore, this is because it is possible to receive the supplied power and drive the electronic device with higher accuracy.

[0313] 5. Process (b1)

[0314] like Fig. 9 Indicated by reference numeral S6 , step ( b1 ) is a step of switching the operating unit to an OFF state.

[0315] Specifically, for example, when the operation unit includes a switch member, it is preferable to operate the switch member so that the control-side CC terminal and the ground point are not electrically connected.

[0316] This is because by implementing in this way, switching can be performed with a simpler structure.

[0317] 6. Process (b2)

[0318] like Fig. 9 As indicated by reference numeral S7 in FIG. 1 , step (b2) is a step of setting the connection establishing unit to a disconnected state with respect to the power supply device, and allowing the power supply device to recognize that the connection with the electronic device has been disconnected.

[0319] Specifically, it is preferable to set the step of disconnecting the control-side CC terminal from the connection establishing section, causing the voltage detecting section to determine that the potential has deviated from a predetermined value, and thereby recognizing that the connection with the electronic device has been disconnected.

[0320] This is because, by implementing this, the potential of the power supply-side CC power supply device can be set to a value deviating from a predetermined range via the control-side CC terminal, and the power supply device can be controlled with higher accuracy without depending on the supplied power.

[0321] 7. Process (b3)

[0322] like Fig. 9 As indicated by reference numerals S8 to S9 in the figure, step (b3) is a step of stopping the power supply from the power supply device to the electronic device to stop the electronic device.

[0323] Specifically, when the voltage detection unit determines that the connection with the electronic device has been disconnected, the voltage detection unit preferably transmits a signal to the supply control unit to stop supplying the predetermined power.

[0324] Furthermore, it is preferable that the supply control unit, which has received the permission signal, turns the power supply device off to stop supplying the predetermined power.

[0325] Possibility of industrial application

[0326] The power supply control device of the present invention is configured to control the power supply device by using the CC terminal in a USB terminal of the Type-C standard, thereby controlling the on / off of an electronic device.

[0327] For example, the invention is characterized by comprising: a connection establishing unit that controls the presence or absence of power supply from the power supply device to the electronic device; and an operation unit that switches the connection establishing unit to connection / disconnection with the power supply device.

[0328] Thus, by turning on the operating unit, the power supply from the power supply device to the electronic device can be turned on, and by turning off the operating unit, the power supply from the power supply device to the electronic device can be turned off.

[0329] Furthermore, even with a simple configuration, it is possible to control the power supply from the power supply device to the electronic device with high accuracy.

[0330] Furthermore, since it is not affected by the supplied electric power, the versatility can be improved.

[0331] That is, in the power supply control device of the present invention, the voltage detection unit of the power supply device operates with very small power. Therefore, as long as a USB terminal of the Type-C standard is used, it can be expected that a power supply control device with a common structure (versatility) can be used without relying on power supplied by the power line.

[0332] In addition, the power supply control device of the present invention does not rely on power supplied by the power line, so even if the operating part is set as a contact switch, it can be expected that the risk of abnormal heating caused by contact resistance, dust accumulated in the switch, etc. can be greatly reduced, and it can be used more safely.

Claims

1. A power supply control device that turns on / off the power supply from a power supply device having a USB terminal of the Type-C standard to an electronic device, characterized in that: The electronic device comprises: a connector electrically connected to the power supply device via the USB terminal; a connection establishment unit controlling the presence or absence of power supply from the power supply device to the electronic device; and an operation unit switching the connection establishment unit on / off relative to the power supply device. The connector has a control-side CC terminal electrically connected to a power-supply-side CC terminal of the power supply device. The connection establishing unit is configured to electrically connect the control-side CC terminal to a ground point via a predetermined pull-down resistor, thereby allowing the power supply device to recognize that the electronic device is connected and supply power to the electronic device, and The configuration is such that when the operating unit is turned on, the power supply from the power supply device to the electronic device is turned on, and when the operating unit is turned off, the power supply from the power supply device to the electronic device is turned off.

2. The power supply control device according to claim 1, characterized in that: The operation unit includes a first switch component provided between the control-side CC terminal and the ground point.

3. The power supply control device according to claim 1 or 2, characterized in that: The operation portion includes a second switch component provided between the ground point and a ground terminal in the electronic device.

4. The power supply control device according to claim 1 or 2, characterized in that: The power supply device is configured to supply power with standard power based on the USB standard when it is recognized that the power supply device is connected to the electronic device and when it is recognized that a prescribed control signal is not input to the CC terminal on the power supply side. The connection establishment unit is configured to cause the power supply device to supply the standard power as an initial condition when the operating unit is switched from a disconnected state to an on state.

5. The power supply control device according to claim 1 or 2, characterized in that: The connection establishing unit includes a power supply condition generating circuit that transmits a control signal instructing the power supply from the power supply device to the electronic device.

6. The power supply control device according to claim 5, characterized in that: When there are a plurality of power supply conditions indicating electric power requested to the power supply device, the power supply condition generating circuit includes a plurality of different circuit patterns corresponding to the power supply conditions, respectively.

7. The power supply control device according to claim 5, characterized in that: The configuration is such that, when the power supply condition generating circuit has a plurality of power supply conditions indicating power requested to the power supply device, the operating unit switches the power supply conditions in a predetermined order.

8. The power supply control device according to claim 1 or 2, characterized in that: The connection establishing unit includes a notification unit that indicates whether the connection state or the disconnected state is established with respect to the control-side CC terminal.

9. The power supply control device according to claim 1 or 2, characterized in that: The connection establishing unit includes a checking unit that detects a voltage supplied from the power supply device to the electronic device.

10. The power supply control device according to claim 1 or 2, characterized in that: When the power supply device has a sleep function that turns off power supply when the current is lower than a predetermined threshold current for a predetermined period of time or longer, the connection establishment unit has a wake-up circuit that causes the power supply device to supply a current exceeding the predetermined threshold current.

11. A control method for a power supply control device, which turns on / off the power supply from a power supply device having a USB terminal of the Type-C standard to an electronic device, characterized in that: The power supply control device comprises: a connector electrically connected to the power supply device via the USB terminal; a connection establishment unit controlling the presence or absence of power supply from the power supply device to the electronic device; and an operation unit switching the connection establishment unit to be connected / disconnected with respect to the power supply device. The connector has a control-side CC terminal electrically connected to a power-supply-side CC terminal of the power supply device. The control method of the power supply control device comprises the following steps (a1) to (a3) ​​and (b1) to (b3), Step (a1): operating the operating unit to an on state to electrically connect the control-side CC terminal to a ground point via a predetermined pull-down resistor, Step (a2): a step of causing the power supply device to recognize that the electronic device is connected. Step (a3): supplying electric power from the power supply device to the electronic device, Step (b1): operating the operating unit to an OFF state to release the pull-down of the control-side CC terminal, Step (b2): a step of causing the power supply device to recognize that the electronic device has been removed. Step (b3): ​​a step of stopping the supply of electric power from the power supply device to the electronic device.

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