JP2023047269A - Usb cable and control method for power supply device - Google Patents

Abstract

To provide a USB cable and a control method for power supply device that can easily reset a sleep state of a power supply device and place the power supply device in a supply state even when the USB cable is neither inserted nor extracted.SOLUTION: A USB cable comprises a first connector which is connected to a power supply device, and has at least a VBUS terminal, a GND terminal and a CC terminal and a second connector which is connected to electronic equipment supplied with electric power from the power supply device, and further comprises a switch part which switches the USB cable from a non-connection state to a connection state to the power supply device to reset a sleep state of the power supply device.SELECTED DRAWING: Figure 1

Description

The present invention relates to a method for controlling a USB (Universal Serial Bus) cable and a power supply device. In particular, a USB cable and a power feeding device using such a USB cable that can easily release the sleep state of the power feeding device and bring the power feeding device into a power feeding state even when the USB cable is not inserted and removed related to the control method of

In recent years, power has been supplied to electronic devices from a power supply device such as a portable battery via a USB cable. It has increased.
Under such circumstances, a Type-C standard USB cable (hereinafter sometimes referred to as a Type-C cable) that can supply a large amount of electric power has begun to attract attention.
The reason for this is that by using the Type-C cable, in addition to the generalization by the unified connector (USB connector) that the USB cable before the Type-C standard had, the increase in power supply (maximum 5A, 48V ), reduction of heat loss, and expansion of applications by increasing the number of connector terminals (24 pins).

On the other hand, with Type-C cables, as the amount of power that can be supplied increases, problems such as heat generation due to contact resistance may occur when a switch is provided on the power line.
Furthermore, when the power supply device enters a sleep state because the current supplied to the power line does not reach a predetermined value for a certain period of time or longer, the power supply cannot be resumed even if the switch provided on the power line is operated. there was a case.
Therefore, in order to restart the power supply, it was necessary to disconnect the USB cable once and then reconnect it. Therefore, various techniques have been conventionally proposed to solve this problem.

As an example, a cable equivalent to a Type-C cable has been disclosed, which can stop power supply from a power supply device by means of a switch provided in a communication line (see Patent Document 1).
More specifically, as shown in FIG. 12, a first connector 301, a second connector 302, a first power line 312 for power supply, a communication line 313, and a The cable 300 includes a control unit 303, a switch 304 provided on a communication line, a first temperature detection unit 308 capable of detecting the temperature around the first connector 301, and the like.
The control unit 303 communicates between the power supply device and the electronic device so that power supply via the first power line 312 is not performed when the first temperature reaches or exceeds a predetermined temperature. This configuration is such that the line 313 is in a non-connected state.

JP 2021-89604 A (claims, drawings, etc.)

However, the cable disclosed in Patent Document 1 is an invention of a safety device when the temperature of the first connector becomes excessively high. had to reconnect the cable.
That is, there is a problem that it is difficult to cancel the sleep state of the power supply device and restart the power supply when the cable is not connected or disconnected.

As a result of extensive studies, the inventors of the present invention found that the connection state and the non-connection state of the USB cable can be switched by providing a predetermined switch portion in the USB cable, and completed the present invention. It is what I let you do.
That is, according to the present invention, it is an object of the present invention to provide a USB cable that can easily release the sleep state of the power supply device and bring the power supply device into the power supply state.
Further, according to another invention of the present invention, there is provided a method of controlling a power supply device for easy and stable power supply using such a USB cable.

According to the present invention, a first connector connected to a power supply device and having at least a VBUS terminal, a GND terminal, and a CC (Configuration Channel) terminal, and a second connector connected to an electronic device to which power is supplied from the power supply device and a connector, characterized by comprising a switch unit for switching the USB cable from a non-connected state to a connected state with respect to the power supply device to cancel the sleep state of the power supply device. Such a USB cable is provided to solve the above-mentioned problems.
With this configuration, even if the USB cable is not inserted or removed, the USB cable can be temporarily disconnected and then connected again.
Therefore, the sleep state of the power supply device can be canceled and the power supply device can be put into the power supply state.

In constructing the USB cable of the present invention, it is preferable that the switch section is provided between at least one of the CC terminal and the GND terminal and the ground section.
With this configuration, the power applied to the switch section is constant regardless of the power supplied to the VBUS terminal. can do.

Moreover, in constructing the USB cable of the present invention, it is preferable that the switch section has a predetermined pull-down resistance between the CC terminal and the ground section.
By configuring in this way, the USB cable can be used even if it does not have a circuit for transmitting a signal for controlling the power feeding device to the CC terminal, so that the versatility of the USB cable can be improved.

Further, in constructing the USB cable of the present invention, it is preferable that the switch unit has a power supply condition generation circuit that causes the power supply device to supply predetermined power based on the USB rapid charging standard.
By configuring in this way, it is possible to cause the power supply device to output power conforming to the rapid charging standard, so that the versatility of the USB cable can be further improved.

Further, in constructing the USB cable of the present invention, it is preferable that the switch section has a variable resistance section that switches between at least two different resistance values.
With this configuration, it is possible to switch between two resistance values (combined resistance value) according to the specifications of the power supply device. It is possible to change the connected state and the non-connected state more easily and accurately.
Therefore, it is possible to more effectively prevent erroneous detection due to measurement error and failure due to overcurrent when switching between the connected state and the unconnected state of the USB cable.

Further, in constructing the USB cable of the present invention, when the power supply device is the first power supply device, the switch unit is a second power supply device that supplies power to the switch unit, which is different from the first power supply device. is preferably provided.
With this configuration, the switch section can be stably driven regardless of whether the first power supply device is in the power supply state or the non-power supply state, and the sleep state of the power supply device can be canceled more easily. , the power supply device can be in the power supply state.

In constructing the USB cable of the present invention, it is preferable to have a drive section for switching the switch section.
By configuring in this way, the operation of the switch section can be enhanced, and for example, the switch section can be driven even at a remote position by wireless communication or the like.
Therefore, it is possible to more easily release the sleep state of the power supply device and bring the power supply device into the power supply state.

このように構成することにより、給電装置を効率的にスリープ状態として無駄な電力消費を防ぐことができる。 In constructing the USB cable of the present invention, the switch section sets the time for transition to the sleep state of the power supply device to be T _S (seconds), and turns the switch section from the ON state to the OFF state and then to the ON state again. It is preferable that the following relational expression (1) is satisfied, where T ₀ (seconds) is the time up to.

By configuring in this way, it is possible to efficiently put the power supply device into the sleep state and prevent wasteful power consumption.

In constructing the USB cable of the present invention, it is preferable to provide a protection section between the VBUS terminal and the electronic device to prevent at least reverse current flow or overcurrent.
By configuring in this way, it is possible to effectively prevent backflow and overcurrent to the power supply device when an electromotive force is generated in the electronic device or when the electronic device is short-circuited.
Therefore, since the USB cable can be used regardless of the type of electronic device that supplies power, the versatility of the USB cable can be further improved.

Another aspect of the present invention is a first connector having at least a VBUS terminal, a GND terminal, and a CC terminal that is connected to a power supply device, and a second connector that is connected to an electronic device to which power is supplied from the power supply device. , a switch unit, and a power supply device using a USB cable, the method comprising the following steps (1) to (3).
(1) Connecting the first connector to the power supply device and connecting the second connector to the electronic device (2) Turning off the switch unit to disconnect the USB cable and put the power supply device in the sleep state Step (3) Switching the switch unit to the ON state, connecting the USB cable, and canceling the sleep state of the power supply device. Also, the USB cable can be temporarily disconnected and then connected again.
Therefore, it is possible to easily and stably release the sleep state of the power supply device and bring the power supply device into the power supply state.

FIG. 1 is a block diagram for explaining the outline of the USB cable of the present invention and the relationship between the power supply device and electronic equipment. 2(a) and 2(b) are perspective views for explaining an example of the shape of the USB cable of the present invention. FIG. 3 is a block diagram for explaining the USB cable of Configuration Example 1 of the present invention. FIGS. 4A and 4B are block diagrams for explaining a more specific configuration of the USB cable of configuration example 1 of the present invention. FIGS. 5A to 5C are block diagrams for explaining USB cables of configuration examples 2 to 4 of the present invention. FIG. 6 is a block diagram for explaining the USB cable of Configuration Example 5 of the present invention. FIG. 7 is a block diagram for explaining the USB cable of Configuration Example 6 of the present invention. FIG. 8 is a block diagram for explaining a USB cable having another configuration according to the present invention. FIGS. 9(a) and 9(b) are block diagrams for explaining the USB cable having the variable resistance part of the present invention. FIG. 10 is a flow chart for explaining an example of the operation of the USB cable of the present invention. FIG. 11(a) is a timing chart for explaining an example of the operation of the USB cable of the present invention, and FIG. 11(b) is a conventional USB cable capable of stopping the power supply from the power supply device. It is a timing chart diagram for explaining an example of the operation of. FIG. 12 is a diagram for explaining a USB cable as a conventional USB cable.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with appropriate reference to the drawings.
In addition, in each drawing used for explanation, the same components may be denoted by the same reference numerals, and the explanation thereof may be omitted.
Each drawing used for explanation is a schematic representation to the extent that these inventions can be understood, and the devices used, shapes, dimensions, materials, etc. described in the explanations are preferred examples within the scope of the invention. Only. Therefore, the present invention is not limited to only the following embodiments without particular reasons.

[First embodiment]
The USB cable of the first embodiment, as illustrated in FIG. and a second connector connected to an electronic device 200 to which power is supplied from the USB cable 10, wherein when the power supply device 100 is put into a sleep state, the USB cable 10 is changed from a non-connected state to a connected state. , to cancel the sleep state of the power supply device 100 .
Hereinafter, the USB cable of the first embodiment will be described in detail with reference to the drawings as appropriate, divided into components including the power supply device and the electronic device connected to the USB cable.
In addition, the USB cable of the present invention includes a cable type circuit configuration (see FIG. 2(a)) that exhibits the same function as the USB cable, a circuit board (see FIG. 2(b)), and an electronic device. Circuit configurations such as built-in circuit modules (not shown) that supply power from a power supply device to an electronic device are also included.

1. Power Supply Device The power supply device is a device connected to the first connector of the USB cable, and is a device that outputs a predetermined amount of electric power to an electronic device, which will be described later, via the USB cable.
Moreover, it is preferable to turn off the power supply of the power supply device to enter a sleep state when there is no power supply from the power supply device.
This is because the power consumption of the power supply device can be suppressed and the power supply time can be effectively lengthened.

Also, the power supply device preferably has a charging function of 3.6 to 48V conforming to the USB Type-C standard.
Specifically, although not shown, the power supply device includes a voltage detection unit that measures the potential of the CC terminal, a pull-up resistor that controls the potential applied to the CC terminal, and a supply control unit that controls the power to be supplied. It is preferable to have

Examples of power supply devices include AC adapters used by connecting to AC 100V outlets, portable batteries using lithium batteries, gallium nitride batteries, etc., automobile batteries, fuel cells, power generators such as solar power and wind power. Preferably.
The reason for this is that such a power supply device can suitably receive power supply condition information from a power supply condition generation circuit, which will be described later, and output predetermined power based on the power supply condition information. This is because malfunctions can be more effectively prevented.

In addition, the sleep state means that when the current supplied from the power supply device to the VBUS terminal falls below a preset reference value for a certain period of time or longer, it is recognized that there is no power supply from the power supply device, and the electric device stops supplying power. This is the state in which the power supply is stopped.
Specifically, it is preferable that the time during which the current falls below the reference value and the power supply device enters the sleep state is a value within the range of 1 to 300 seconds.
The reason for this is that with such a time, the power consumption of the power supply device can be suppressed more effectively, and the power supply time can be effectively lengthened.
Therefore, the sleep state time is more preferably a value within the range of 5 to 60 seconds, more preferably a value within the range of 10 to 30 seconds.

Moreover, the reference value of the current for the sleep state is preferably a value within the range of 1 to 500 mA.
The reason for this is that with such a current, it is possible to more effectively determine whether the power supply is stopped and to effectively lengthen the power supply time.
Therefore, the reference value of the current for the sleep state is more preferably a value within the range of 10 to 300 mA, and even more preferably a value within the range of 50 to 150 mA.

In addition, the power supply device measures the potential of the CC terminal, recognizes the connection of the USB cable, and cancels the sleep state by the potential change when the USB cable is removed and reinserted. is preferred.
That is, by measuring the potential of the CC terminal by the voltage detection unit of the power supply device, the CC terminal is connected to the ground (the internal terminal of the USB cable, which is the ground potential) via a circuit element having a predetermined resistance value. It is preferable to determine that the USB cable is connected when the fact is indirectly detected.
The reason for this is that with such a configuration, it is possible to more easily detect whether the USB cable is connected or not connected, and to release the sleep state more quickly.

Specifically, the resistance value (hereinafter sometimes referred to as connection resistance value) between the CC terminal and the grounding portion, which the voltage detecting portion recognizes as the connected state of the power supply device and the USB cable. ) is preferably 1.2 kΩ or more.
The reason for this is that such a resistance value stabilizes the potential measured by the voltage detection section, and more effectively prevents erroneous detection due to measurement errors or the like.
On the other hand, if the resistance value is excessively high, the potential change of the CC terminal becomes excessively small, and it is susceptible to measurement errors. A value within the range of 3 to 6 kΩ is preferable, and more preferable.

On the other hand, as a mode in which the voltage detection unit recognizes that the power supply device and the USB cable are in a non-connected state, the CC terminal may be an open end, or the GND terminal may be disconnected from the ground. preferable.
The reason for this is that the sleep state of the power supply device can be easily released by a switch unit, which will be described later, and the power supply device can be put into the power supply state even with a simpler configuration.

In another aspect, the voltage detection unit recognizes that the power supply device and the USB cable are in a non-connected state (including a case where a USB cable to which an electronic device is not connected is connected to the power supply device). Preferably, the resistance value between the CC terminal and the ground portion (hereinafter sometimes referred to as non-connection resistance value) is less than 1.2 kΩ.
The reason for this is that such a resistance value can more effectively prevent erroneous detection due to measurement error and failure due to overcurrent in the voltage detection section.
On the other hand, if the resistance value is too small, the potential change of the CC pin becomes excessively large, which is likely to cause failures. A value in the range of 0.8 to 1.15 kΩ is preferable, and more preferable.

Moreover, as a specific configuration of the voltage detection unit, it is preferable to use a voltmeter IC, a power meter IC, or the like.
The reason for this is that with such a configuration, the sleep state of the power supply device can be more easily canceled by a switch section, which will be described later, to bring the power supply device into the power supply state.

2. Electronic Device The electronic device is a device that is connected to the second connector of the USB cable and driven by receiving predetermined power output from the power supply device.
Specifically, fans (including circulators), ventilation fans, heaters, coolers, vacuum cleaners, refrigerators, warm storages, notebook PCs, lights, displays, radios, televisions, ultrasonic transmitters, metal detectors, fish finders, Portable game machines, communication modems, video disk players, IC recorders, measuring instruments, laser oscillators, etc. are preferred.
The reason for this is that such an electronic device can be more easily driven by a Type-C cable.
Further, it is preferable that the driving power of the electronic device is within the range of 2.5 to 240W.
The reason for this is that with such power consumption, it can be driven within the allowable power range of the Type-C cable, and there is no need for an additional booster circuit, making it easy to downsize the entire adapter. It is for the sake of becoming.
Therefore, it is more preferable that the power consumption of the electronic device to be driven is in the range of 5 to 150W, and more preferably in the range of 10 to 100W.

3. First Connector The first connector has at least a VBUS terminal, a GND terminal, and a CC terminal, and is a connector for connecting to the opening of the power supply device.
Specifically, it is preferably a Type-C standard plug or receptacle.
The reason for this is that it can be connected to the power supply device without using a conversion connector or the like, and it becomes easy to downsize the entire USB cable.

4. Second Connector The second connector is a connector for connecting a power line for transmitting power output from the power supply device to the electronic device.
Specifically, at least DC round plugs, DC round jacks, DC square plugs, DC square jacks, cigar plugs, cigar jacks, audio stereo plugs, audio stereo jacks, board connection plugs, board connection jacks, etc. It is preferred to use one.
The reason for this is that such a connector has at least the terminals necessary for supplying DC power, eliminating the need for additional terminals and facilitating miniaturization of the entire USB cable. is.

5. Switch Unit (1) Basic Configuration The switch unit switches the state of the USB cable to the power supply device between an electrically connected state and a non-connected state by switching between an ON state and an OFF state. , is a portion that cancels the sleep state of the power supply device.
Specifically, it is a portion where the switch section is turned off to set the potential of the CC terminal to a value deviated from the reference potential, and the switch is turned on again to return the potential of the CC terminal to the reference potential.
Here, although the reference potential varies depending on the specifications of the power supply device, the GND terminal is set to the ground potential, and the CC terminal is set to the ground potential through a resistance within the range of the connection resistance value (corresponding internal resistance in the case of an IC). It is preferable to set the potential at the time of connection to the ground portion.
The reason for this is that by using such a reference potential, the USB cable can more easily conform to the Type-C cable standard.

Moreover, it is preferable that the switch section is configured to be in an OFF state when the first connector is pulled out from the power supply device.
This is because it is possible to effectively prevent unintentional power supply by connecting the power supply device and the electronic device while the switch is in the ON state.

Further, regarding the arrangement of the switch section, it is preferable that the switch section is provided between at least one of the CC terminal and the GND terminal and the ground section.
The reason for this is that with such an arrangement, by operating the switch section, the potential of the CC terminal is indirectly changed, making it easier to switch between the connected state and the unconnected state of the USB cable. because it can
Here, as shown in FIG. 1, the switch section 18 connected to the CC terminal 11c may be referred to as a first switch section 18a, and the switch section 18 connected to the GND terminal 11b may be referred to as a second switch section 18b.
Further, as the switch section, a power supply condition generating circuit, which will be described later, is provided between the CC terminal and the ground part, and a switch is provided in the power line for supplying power to the power supply condition generating circuit. Sometimes referred to as a department.
By configuring in this way, it is possible to indirectly cut off the power supply condition generation circuit and to have the same effect as when the switch section is arranged between the CC terminal and the ground section.

Moreover, when the power supply device is the first power supply device, the switch section preferably has a second power supply device that supplies power to the switch section, which is different from the first power supply device.
Specifically, the switch section preferably has a lithium ion battery, an alkaline button battery, an alkaline dry battery, a solar panel, a piezoelectric element, or the like as the second power supply device.
The reason for this is that it can be used as a power source capable of supplying power independently of the power supply device, such as when power for driving the switch is received from the power supply device.

Also, the switch section preferably has a drive section for controlling switching.
Specifically, the driving section is a control device for controlling the driving of the switch section, which will be described later, and is preferably composed of a microcomputer, a PLC, an electromagnetic relay, and the like.
Furthermore, it is preferable that the drive section is driven based on signals output from a temperature sensor, a current sensor, a voltage sensor, a wireless communication IC, or the like attached to the drive section.
The reason for this is that even if the switch and the operation unit are separated, a signal from a sensor, a wireless communication IC, or the like can be used as a trigger, and the degree of freedom in arranging the switch is improved.

Moreover, it is preferable that the switch section has a switch for disconnecting the CC terminal or the GND terminal from the ground section, and a circuit element for making the power supply device recognize the connection of the USB cable. .
The reason for this is that by configuring in this way, the switch section and circuit elements can be changed according to the type of power supply device and electronic device, and the versatility of the USB cable can be further enhanced.

Furthermore, it is preferable that the switch section has a display section for displaying to the outside whether or not the power supply device is in the sleep state.
Specifically, it is preferably a liquid crystal panel, an organic panel, an LED light, an electronic paper, or the like.
The reason for this is that such a configuration makes it possible to clarify the power supply state of the power supply device and effectively prevent the user from forgetting to turn off the switch.

(2) Switch As for the type of switch, it is preferable to use a contact switch or a non-contact switch.
More specifically, the contact switch is preferably a rocker switch, a push switch, a tactile switch, a slide switch, a rotary switch, a toggle switch, an electromagnetic relay switch, a jack switch, or the like.
The contactless switch is preferably a MOSFET (Metal-oxide-semiconductor field-effect transistor) switch, a solid-state switch, or the like, which is a metal-oxide-semiconductor field-effect transistor.
The reason for this is that these types of switches are easy to obtain, easy to assemble, and easy to mass produce.

(3) Circuit element The circuit element 15 cooperates with a pull-up resistor 101 connected to a CC terminal (hereinafter referred to as a CC1 terminal, although not limited to a CC1 terminal or a CC2 terminal) in the power supply device 100. It is a portion that allows the power supply device 100 to recognize the connection and/or power supply conditions of the USB cable 10 .
That is, it is preferable to set the resistance value of the circuit element 15 within the range of the connection resistance value.
A specific example of the circuit element 15 will be described below with reference to FIGS. 3 and 4(a) to (b).

(3)-1 Pull-down resistor specified by USB Type-C The USB Type-C standard specifies that a pull-down resistor should be mounted on the CC terminal of the electronic device or cable connected to the power supply device.
As shown in FIG. 3, in the USB cable 10, a series circuit of a switch 17 as a switch section 18 (first switch section 18a) and a pull-down resistor as a circuit element 15 is provided between the CC1 terminal and the ground section. is provided.
Therefore, by turning on or off the switch 17 of the switch section 18, the pull-down resistor is switched to the connection state or the non-connection state to the CC1 terminal, so that the USB cable 10 can be connected without inserting or removing the USB cable 10 from the power supply device 100. The effects of the present invention can be obtained because the device can be put in and taken out.

(3)-2 Power supply condition generation circuit The power supply condition generation circuit is a circuit that transmits a signal for instructing the power supply device to supply power according to the USB PD (USB Power Delivery) standard, which is a rapid charging standard. is.
That is, the power supply device 100 receives a signal indicating the power supply condition input from the CC terminal, and outputs power corresponding to the power supply condition to the VBUS terminal.
Specifically, as shown in FIG. 4A, the USB cable 10b incorporates a power supply condition generation circuit (hereinafter referred to as a PD control unit 15b) that generates power supply conditions conforming to the USB PD standard. The configuration is such that a pulse train, which is an electrical signal corresponding to a desired power supply condition, can be output to the power supply device 100 via the CC1 terminal.
More specifically, the PD control section 15b is composed of a microcomputer, an emulator IC, or the like.
However, in the USB cable 10b of this form, the switch section 18 (first switch section 18a) including the switch 17 is provided between the terminal for outputting the power supply condition signal of the PD control section 15b and the CC1 terminal. Therefore, by turning ON or OFF the switch section 18 including the switch 17, the PD control section 15b can be switched to the connection state or the non-connection state to the CC1 terminal.
When the PD control unit 15b and the CC1 terminal are in a disconnected state, the power supply device 100 recognizes that the USB cable 10b is not connected to the power supply device 100. FIG. Therefore, even if the USB cable 10b is not inserted into and removed from the power supply device 100, a state in which the USB cable 10b is inserted and removed can be created, so that the effects of the present invention can be obtained.

(3)-3 eM Power Supply Condition Generating Circuit Here, in the eMarker specification of the USB PD standard, the eMarker chip is incorporated in the USB cable connected to the power supply device, and the cable information is transmitted to the power supply device.
A circuit using such an eMarker chip can be used as a circuit element of the present invention.
Here, FIG. 4(b) is a block diagram showing the USB cable 10c of the embodiment provided with the eM power supply condition generation circuit 15c, which is a power supply condition generation circuit using the eMarker chip.
The power supply device 100 recognizes the power supply conditions input from the eM power supply condition generating circuit 15c via the CC1 terminal and the CC2 terminal, that is, the cable information, and outputs power corresponding to the power supply conditions to the VBUS terminal.
However, in the USB cable 10c of the present invention, a switch section 18 (a first switch A portion 18a) is provided. Therefore, by turning ON and OFF the switch unit 18 including the switch 17, the eM power supply condition generation circuit 15c can be switched between the connection and non-connection states with the CC1 terminal.
When the eM power supply condition generating circuit 15c and the CC1 terminal are in a disconnected state, the power supply apparatus 100 recognizes that the USB cable 10c is not connected to the power supply apparatus 100. FIG. Therefore, even if the USB cable 10c is not inserted into and removed from the power supply device 100, a state in which the USB cable 10c is inserted and removed can be created, so that the effects of the present invention can be obtained.

(4) Variable Resistance Section As shown in FIG. 9A, the switch section preferably has a variable resistance section 19a that switches between at least two different resistance values.
Specifically, a circuit element 15 having a resistance value within the range of the connection resistance value is provided between the CC terminal and the ground portion, and a switch 17 and a resistor 16a are provided in parallel with the circuit element 15. It is preferable that the combined resistance of the circuit element 15 and the resistor 16a be the unconnected resistance value.
That is, when the switch 17 is turned off, the power supply device 100 and the USB cable 10j are preferably connected, and when the switch 17 is turned on, they are not connected.
The reason for this is that with such a configuration, it is possible to switch between two resistance values according to the specifications of the power supply device, making it easier to change the connection state and the non-connection state of the USB cable. This is because
This is because it is possible to more effectively prevent erroneous detection due to measurement error, failure due to overcurrent, and the like.

Further, it is preferable that a jack switch type switch is provided as a switch for the variable resistance section.
Specifically, as shown in FIG. 9B, when the second connector 13 and the electronic device 200 are in a non-connected state, the CC terminal and the ground portion are connected (so-called normally closed state). Then, it is preferable to have a variable resistance section 19a that disconnects the CC terminal from the ground section when the second connector 13 and the electronic device 200 are in a non-connected state.
That is, when the second connector 13 is connected to the electronic device 200, the tip of the GND terminal of the switching device 17a is pushed up by the protrusion 202 provided on the electronic device 200, thereby connecting the GND terminal and the CC terminal. is preferably a non-contact configuration.
The reason for this is that with such a configuration, it is possible to more easily switch between the connected state and the disconnected state of the power supply device and the USB cable 10k by inserting the second connector.
Although the variable resistance section 19a is used alone as the first switch section 18a here, it is also preferable to use a plurality of switch sections 18 together as another mode.

In addition, although not shown, at least two power supply devices, that is, the power supply device A and the power supply device B are connected in parallel, and when the power supply by the power supply device A is stopped, the power supply device B It is preferable to set it as the structure which supplies electric power.
Specifically, a variable resistance section is provided in the power feeding device B, and the CC terminal and the grounding portion of the variable resistance section are set in a normally closed state, and when the power from the power feeding device A is lost, the CC terminal and , and the ground portion are in a disconnected state, and power is supplied from the power supply device B. As shown in FIG.
The reason for this is that with such a configuration, for example, power can be supplied by an AC power supply in normal times, and can be quickly switched to power supply by a portable battery in an emergency such as a power failure.
Therefore, it is more preferable that the power supply device A normally supplies power to the electronic device and charges the power supply device B.

6. Protection Unit Although not shown, it is preferable to provide a protection unit between the VBUS terminal and the electronic device to prevent at least reverse current flow or overcurrent.
The reason for this is that if the electronic device is a fan or the like, even after the switch is turned off, the fan may continue to rotate due to inertia and generate an electromotive force. This is because the current may flow back from the device to the power supply device.
Also, when the VBUS terminal of the second connector and the GND terminal of the second connector are short-circuited, an overcurrent may flow from the power supply device.
That is, by providing the power line of the USB cable with the protective portion, it is possible to effectively prevent damage to the USB cable and further prevent damage to the power supply device.
Specifically, a PTC thermistor, a diode, or the like is preferable.

7. Operation Next, the operation of the USB cable of the present invention described so far will be described with reference to the flowchart of FIG. 10 and the timing chart of FIG.
In addition, in the timing chart of FIG. 11, the operation of the USB cable of the present invention is compared with the operation of a conventional USB cable having a switch section provided on a power line.

(1) Flowchart 1
FIG. 10 shows a flow chart of the operation of the USB cable of the present invention.
Specifically, consider a flowchart in which the power supply device is in the sleep state in the initial state and the switch section of the USB cable is turned on.
First, in step S1, the first connector of the USB cable of the present invention is connected to the power supply device, and the second connector of the USB cable is connected to the electronic device. At this time, the USB cable is connected, and the sleep state of the power supply device is temporarily canceled.
Next, in step S2, the switch section of the USB cable is turned off, and in step S3 immediately thereafter, the USB cable is disconnected.
Next, in step S4, after the time T _S (seconds) for the power supply device to transition to the sleep state has elapsed since the USB cable was disconnected, the power supply device is placed in the sleep state.
Next, in step S5, the switch portion of the USB cable is turned on, and in step S6 immediately after that, the USB cable is connected.
Next, in step S7 immediately after step S6, the power supply device detects the connection state with the USB cable, the sleep state of the power supply device is canceled, and power supply is restarted.
Through steps S1 to S7 described above, the USB cable of the present invention can control the non-power feeding state and the power feeding state of the power feeding device without requiring physical insertion and removal of the cable.

(2) Flowchart 2
Also, although not shown, consider a flow chart in which the power supply device is in the sleep state in the initial state and the switch section of the USB cable is turned off.
First, as in Flowchart 1, in step S1, the first connector of the USB cable of the present invention is connected to the power supply device, and the second connector of the USB cable is connected to the electronic device.
Next, steps S2 to S4 are omitted, and the switch portion of the USB cable is turned on in step S5, and the USB cable is connected in step S6 immediately thereafter.
Next, in step S7 immediately after step S6, the power supply device detects the connection state with the USB cable, the sleep state of the power supply device is canceled, and power supply is restarted.
This flow chart is used when a contactless switch is used.

(3) Timing Chart The features of the operation of the USB cable of the present invention in the description of the flowchart of FIG. 10 will be further described with reference to FIGS. 11(a) and 11(b).
That is, FIG. 11(a) shows a timing chart of the operation of the USB cable of the present invention, and FIG. 11(b) shows a timing chart of the operation of the conventional USB cable.
From FIGS. 11A and 11B, it can be seen that the time T ₀ (seconds) required for both USB cables to turn the switches from the ON state to the OFF state until they are turned ON again is T ₁ (between t1 and t2), and when T ₁ <T _S , it is understood that the power supply can be restarted by turning the switch unit from the OFF state to the ON state.
On the other hand, when the time T ₀ (seconds) is T ₂ (between t3 and t4) and T ₂ ≧T _S , the conventional USB cable will supply power to the control unit once it enters the sleep state. is performed from the power supply device, even if the switch section is turned on from the off state, a predetermined potential change cannot be caused to the CC terminal.
That is, since the conventional USB cable cannot cancel the sleep state of the power supply device and thus restart the power supply, it is necessary to remove the USB cable from the power supply device and then reinsert it in order to restart the power supply.
On the other hand, with the USB cable of the present invention, by turning the switch from the OFF state to the ON state, a predetermined potential change is effectively caused to the CC terminal, and the sleep state of the power supply device is brought about. It can be released to resume power supply.
Therefore, even if the electronic device is turned on and off frequently and the power supply device enters a sleep state, it is advantageous in that the power supply can be restarted more quickly by operating the switch unit. is.

8. Configuration example (1) Configuration example 1
As shown in FIG. 3, the USB cable of Configuration Example 1 of the present invention is connected to a first connector 11 connected to a Type-C power supply device 100 and an electronic device 200 that uses power from the power supply device 100. It is an example provided with the 2nd connector 13 which is connected.
Specifically, it is connected to the CC terminal (the CC1 terminal in the illustrated example) of the first connector 11, and cooperates with the pull-up resistor 101 in the power supply device 100 to connect the USB cable 10 to the power supply device 100. And/or a circuit element 15 for recognizing a power feeding condition, and a first switch section 18a including a switch 17 for connecting or disconnecting the circuit element 15 and the CC terminal.

The external shape of the USB cable of the present invention is arbitrary, but examples of the external shape of the USB cable are shown in FIGS. 2(a) and 2(b).
The USB cable 10' shown in FIG. 2(a) is an example of a cable type, and a switch such as a slide type that can turn the wiring on and off is provided on the upper surface of a resin and/or metal substantially rectangular parallelepiped body 10x. A portion 18' is provided and circuit elements (not shown) are provided inside the body 10x.
Predetermined cables 10y and 10z extend from the body 10x in two directions, and a first connector 11' is provided at the tip of the cable 10y, and a second connector 13' is provided at the tip of the cable 10z.
Therefore, the shape of the main body 10x may be longer than the shape shown in FIG. 2A, such as a rectangular parallelepiped, a cube, a cylinder, a disk, a plate, or any other shape.
That is, based on the embodiment shown in FIG. 2(a), the effects of the present invention can be obtained without inserting/removing the USB cable to/from the power supply device while further modifying the embodiment to correspond to various uses and functions. can.
The shape, structure, and material of the main body 10x and the shape and structure of the switch portion 18' are not limited to the example shown in FIG. 2(a).

The USB cable 10'' shown in FIG. 2(b) is an example of a circuit board type, and a first connector 11'', a second connector 13'', a first connector 11'', a second connector 13'', and a , and circuit elements such as a switch section 18''.
In this way, in the circuit board type embodiment, while easily mounting various elements such as known semiconductor elements, electronic elements, display elements, measurement elements, and oscillation circuits, a solder-resistant layer is provided, and reflow mounting or the like is performed. becomes extremely easy, and versatility and manufacturing efficiency can be improved.
That is, based on the circuit board type shown in FIG. 2(b), the effect of the present invention can be obtained while further changing the form in accordance with various uses and functions.
Although not shown, the arrangement of various elements such as the first connector, the second connector, the switch section, etc. is not limited to being fixed on the board, but may be drawn out of the board by wiring or the like. It also includes a mode in which there is

(2) Configuration example 2
As shown in FIG. 5A, the USB cable 10d of Configuration Example 2 includes a first connector 11 connected to a USB Type-C power supply device 100 and an electronic device 200 that uses power from the power supply device 100. and a second connector 13 connected to the .
Then, the PD control unit 15b, which is connected to the CC terminal of the first connector 11 and outputs the power supply condition specified by the USB PD, and the GND terminal of the first connector 11 are connected or unconnected to the ground unit. This is an example provided with a switch section 18 (second switch section 18b) including a switch 17 for switching.
Therefore, by turning ON or OFF the switch section 18, the GND terminal of the first connector 11 can be connected or disconnected to the ground section.
At this time, if the GND terminal of the first connector 11 is not connected to the ground portion, the PD control portion 15b does not operate, and a predetermined signal is not output to the CC1 terminal. It recognizes that the USB cable 10d is not connected.
Therefore, even if the USB cable 10d is not inserted into and removed from the power supply device 100, a state in which the USB cable 10d is inserted and removed can be created, so that the effects of the present invention can be obtained.

(3) Configuration example 3
As shown in FIG. 5B, the USB cable 10e of Configuration Example 3 includes a first connector 11 connected to a USB Type-C power supply device 100 and an electronic device 200 that uses power from the power supply device 100. and a second connector 13 connected to the .
A pull-down resistor 15a, which is connected to the CC terminal of the first connector 11 and is specified by USB Type-C, and a pull-down resistor 15a, which is connected to the D+ and D- terminals of the first connector 11 and is specified by USB QC. A switch including a power supply condition generation circuit (hereinafter sometimes abbreviated as a QC control unit 15d) that outputs a power supply condition and a switch 17 that connects or disconnects the GND terminal of the first connector 11 to the ground part It is an example provided with the section 18 (second switch section 18b).
In configuration example 3, the resistance value of the pull-down resistor is set to 5.1 kΩ, which is within the range of the connection resistance value.

Here, in the power supply specifications stipulated by the USB QC standard, by supplying a pulse train composed of a predetermined voltage and a predetermined period to the D+ terminal and the D- terminal, the power supply device 100 can set the power supply condition corresponding to the pulse train. to supply power. Furthermore, pulse trains, ie, power supply conditions, corresponding to a plurality of types of power supply conditions are defined.
Then, the QC control section 15d outputs this pulse train to the D+ terminal and the D- terminal.
Specifically, in the circuit of configuration example 3 of FIG. A voltage dividing circuit 35 is provided, and a pulse train composed of a predetermined voltage and a predetermined period is output to the D+ terminal and the D− terminal.

Therefore, when the GND terminal of the first connector is not connected to the ground portion, the QC control unit 15d does not operate and the CC1 terminal is not applied with a predetermined potential. It recognizes that the cable 10e is not connected.
Therefore, even if the USB cable 10e is not inserted into and removed from the power supply device 100, the state in which the USB cable 10e is inserted and removed can be created, so that the effects of the present invention can be obtained.

(4) Configuration example 4
As shown in FIG. 5C, the USB cable 10f of Configuration Example 4 connects the first connector 11 connected to the USB Type-C power supply device 100 and the electronic device that uses power from the power supply device 100. and a second connector 13 to be connected.
A power supply condition generation circuit (eM power supply condition generation circuit 15c) that is connected to the CC1 terminal and the CC2 terminal of the first connector 11 and outputs the power supply condition specified by USB eMarker, and the GND terminal of the first connector 11 is provided with a switch unit 18 (second switch unit 18b) having a switch 17 that connects or disconnects to the ground portion.
That is, the GND terminal of the first connector 11 can be connected or disconnected from the ground portion by turning ON or OFF the switch portion 18 having the switch 17 . With such a configuration, the eM power supply condition generation circuit 15c does not operate, and a predetermined signal is not output to the CC1 terminal, so the power supply apparatus 100 recognizes that the USB cable 10f is not connected to the connector. Therefore, even if the USB cable 10f is not inserted into and removed from the power supply device 100, a state in which the USB cable 10f is inserted and removed can be created, so that the effects of the present invention can be obtained.

(5) Configuration example 5 and configuration example 6
Configuration example 5 and configuration example 6 correspond to modifications of configuration example 2 and configuration example 4, and as shown in FIGS. In this example, instead of providing a switch section in the power supply line of each power supply condition generation circuit, a switch section for connecting or disconnecting the power supply and the power supply condition generation circuit is provided.

Specifically, as shown in FIG. 6, the USB cable 10g of Configuration Example 5 has a switch having a switch 17 in the line between the already-described PD control section 15b and the VBUS terminal corresponding to its power supply. This is an example in which a section 18 (first switch section 18a) is provided.
As shown in FIG. 7, the USB cable 70 of configuration example 6 includes a switch section 18 ( It is characterized in that a first switch section 18a) is provided.

As shown in FIGS. 6 and 7, in the case of both the USB cable 10g and the USB cable 10h, when the switch unit 18 having the switch 17 is turned off, the power is not connected to the power supply condition generation circuit built in each. Therefore, since the power supply condition generation circuit does not operate, the power supply apparatus 100 recognizes that the USB cable is not connected to the connector.
Therefore, even if the USB cable is not inserted into and removed from the power supply device 100, a state in which the USB cable is inserted and removed can be created, so that the effects of the present invention can be obtained.
Note that, in the case of the configuration example 5 and the configuration example 6, it is preferable to provide the second power supply device so that power can be supplied to the power supply condition generation circuit even when the power supply device is in the sleep state.

(6) Other configuration examples The present invention can also be applied to a USB cable in which a wakeup circuit is provided. FIG. 8(a) is a diagram showing an example thereof, and is a diagram showing an example in which a wakeup circuit 80 is provided in the USB cable 10b of Configuration Example 1. FIG.
A wakeup circuit 80 is provided in the USB cable 10 between the VBUS terminal and the GND terminal, and is composed of a switching circuit 81 and a microcomputer 83 . The microcomputer 83 outputs drive pulses to the switching circuit 81 at predetermined intervals.
Since the switching circuit 81 is turned on for a predetermined time in response to this drive pulse, a predetermined current flows from the VBUS terminal to the GND terminal.
That is, since the predetermined current is set to a current higher than the threshold current at which the power supply device 100 enters the sleep state, it is possible to effectively prevent the sleep state.
On the other hand, in the USB cable of such a configuration example, even if the power supply device stops unintentionally or the switch part is intentionally turned off and the power supply device enters a sleep state, the USB cable can be removed and inserted by operating the switch part. You can wake up more quickly and resume power supply without having to do anything.

Moreover, the wakeup circuit may be built in a USB cable, but it is also preferable to use a cartridge type that can be attached and detached in parallel with respect to the power line.
This is because the configuration of the wakeup circuit can be changed more easily according to the specifications of the power supply device, electronic equipment, and the like.

Further, in the USB cable of the present invention, it is also preferable that the switch section is turned on or off according to a signal detected by a separately provided sensor.
FIG. 8B is a diagram showing an example thereof, and a sensor separately provided for turning ON or OFF the switch section 18 (first switch section 18a) having the switch 17 of the USB cable 10 of Configuration Example 1. This is an example performed according to the signal S detected by 90 . Various sensors can be used as the sensor 90 depending on the purpose.
That is, switching between power feeding and non-feeding of the power feeding device 100 can be performed externally and can be performed by controlling only the circuit element 15 irrespective of the rating of the electronic device 200 .
Therefore, regardless of the rated voltage of the electronic device 200, the power feeding device 100 can be switched between power feeding and non-power feeding with a current that is required only for controlling the circuit element 15 and is relatively small with respect to the power to be supplied.

[Second embodiment]
A method for controlling a power supply device according to the second embodiment includes a first connector connected to the power supply device and having at least a VBUS terminal, a GND terminal, and a CC terminal, and an electronic device to which power is supplied from the power supply device. and a second connector, the method comprising the following steps (1) to (3).
(1) A step of connecting the first connector to the power supply device and connecting the second connector to the electronic device (2) A step of turning off the switch section, disconnecting the USB cable, and putting the power supply device into a sleep state (3) A step of turning on the switch unit to connect the USB cable and canceling the sleep state of the power supply device.

1. Step (1)
Step (1) is a step of connecting the first connector and the second connector to the power supply device and the electronic device, respectively.
Specifically, it is a step of connecting the VBUS terminal and GND terminal of the power supply device to the VBUS terminal and GND terminal of the electronic device, respectively.
At this time, the switch part of the USB cable may be in either the ON state or the OFF state, but it is preferable to connect in the OFF state.
The reason for this is that, by connecting the switch part of the cable in the OFF state, it is possible to effectively prevent unintended supply of power from the power supply device to the electronic device at the time of connection. .

この理由は、給電装置を効率的にスリープ状態として無駄な電力消費を防ぐことができるためである。
従って、スイッチ部は、Ｔ₀≧２Ｔ_Sの関係式を満たすように駆動させることがより好ましく、Ｔ₀≧１０Ｔ_Sの関係式を満たすように駆動させることが更に好ましい。 2. Step (2)
Step (2) is a step of putting the power supply device into a sleep state.
Specifically, in a state where the power supply device and the electronic device are connected by a USB cable and the switch section is in an OFF state, the time T _S (seconds) required for the power supply device to transition to the sleep state or longer elapses.
That is, by making the USB cable unconnected to the power supply device, the power supply device recognizes that the USB cable is not inserted, and by maintaining this state for a predetermined time or more, the sleep state can be easily set. can be done.
At this time, if the time required for turning the switch from ON to OFF and then to ON again is _T0 , the switch can be driven so as to satisfy the following relational expression (1). preferable.

The reason for this is that it is possible to efficiently put the power supply device into a sleep state and prevent wasteful power consumption.
Therefore, the switch section is more preferably driven so as to satisfy the relational expression of T ₀ ≧2T _S , and more preferably driven so as to satisfy the relational expression of T ₀ ≧10T _S .

3. Step (3)
Step (3) is a step of releasing the sleep state of the power supply device and supplying power from the power supply device.
Specifically, it is a step of turning on the switch unit in a state where the power supply device and the electronic device are connected by a USB cable and the power supply device is in a sleep state.
That is, by connecting the USB cable to the power supply device, the power supply device can be made to recognize that the USB cable has been inserted, and the sleep state can be easily canceled to restart the power supply.
At this time, it is preferable that a voltage detection unit provided in the power supply device detect a predetermined potential change of the CC terminal and transmit a signal to the power supply control unit to cancel the sleep state and resume power supply.
The reason for this is that by controlling in this way, the sleep state can be released more easily and the power supply can be resumed.

The USB cable of the present invention changes the potential of the CC terminal by turning on and off the switch provided inside, thereby switching the connection state and the non-connection state of the USB cable.
As a result, the same state as when the USB cable is inserted and removed can be created without inserting and removing the USB cable from the power supply device.
For example, in cooperation with a pull-up resistor in the power supply device, a circuit element is provided that allows the power supply device to recognize the connection state of the USB cable, power supply conditions, etc. Such a USB cable can be configured by turning on and off a switch provided between them.
In other words, the USB cable of the present invention is not limited to a cable-type circuit configuration, and can be used for various circuit configurations such as a circuit board that exhibits the same function, a built-in circuit module of an electronic device, and the like, for supplying power from a power supply device to an electronic device. Aspects can also be applied.
Therefore, since it is possible to realize a Type-C cable that can arbitrarily control the power supply stop or power supply restart of the power supply device, the utility value of the power supply device of the USB standard and the quick charge standard can be further increased, and the industrial applicability is improved. It is extremely high.

10, 10b, 10c, 10d, 10e, 10f, 10g, 10h, 10j, 10k: USB cable, 11: first connector, 13: second connector, 15: circuit element, 15a: pull-down resistor, 15b: PD controller 15c: eM power supply condition generating circuit 15d: QC control unit 17: switcher 18: switch unit 18a: first switch unit 18b: second switch unit 19a: variable resistor unit 31: regulator IC; 33: Microcomputer, 35: Voltage dividing circuit, 80: Wakeup circuit, 81: Switching circuit, 83: Microcomputer, 90: Sensor, 100: Power feeding device, 200: Electronic equipment

Claims (10)

A USB cable comprising a first connector having at least a VBUS terminal, a GND terminal, and a CC terminal connected to a power supply device, and a second connector connected to an electronic device to which power is supplied from the power supply device There is
A USB cable, comprising: a switch section for switching the USB cable from a non-connected state to a connected state to release the sleep state of the power feeding device when the power feeding device is in a sleep state. 2. The USB cable according to claim 1, wherein the switch section is provided between at least one of the CC terminal and the GND terminal and a ground section. 3. The USB cable according to claim 1, wherein the switch section has a predetermined pull-down resistance between the CC terminal and the ground section. The switch unit according to any one of claims 1 to 3, wherein the switch unit has a power supply condition generation circuit that supplies predetermined power to the power supply device based on a USB quick charge standard. USB cable as described. The USB cable according to any one of claims 1 to 4, wherein the switch section has a variable resistance section that switches between at least two different resistance values. 3. The switch unit comprises a second power supply device different from the first power supply device that supplies power to the switch unit when the power supply device is a first power supply device. The USB cable according to any one of 1 to 5. The USB cable according to any one of claims 1 to 6, wherein the switch section has a driving section for switching the switch section. The switch unit has a time T _S (seconds) for transitioning to the sleep state of the power supply device, and a time T ₀ (seconds) for turning the switch unit from an ON state to an OFF state and then turning it ON again. seconds), the USB cable according to any one of claims 1 to 7, wherein the following relational expression (1) is satisfied.

9. The USB cable according to any one of claims 1 to 8, further comprising a protector for preventing at least reverse current flow or overcurrent between the VBUS terminal and the electronic device. a first connector having at least a VBUS terminal, a GND terminal, and a CC terminal connected to a power supply device; a second connector connected to an electronic device to which power is supplied from the power supply device; and a switch section. A control method for a power supply device using a USB cable, characterized by including the following steps (1) to (3).
(1) connecting the first connector to the power supply device and connecting the second connector to the electronic device; (2) turning off the switch unit to disconnect the USB cable; (3) switching the switch unit to an ON state to connect the USB cable and canceling the sleep state of the power supply device;

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