CN112736995A - Universal serial bus power supply device with power supply switching function - Google Patents
Universal serial bus power supply device with power supply switching function Download PDFInfo
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- CN112736995A CN112736995A CN201910972645.4A CN201910972645A CN112736995A CN 112736995 A CN112736995 A CN 112736995A CN 201910972645 A CN201910972645 A CN 201910972645A CN 112736995 A CN112736995 A CN 112736995A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
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Abstract
A universal serial bus power supply device with a power supply switching function comprises a power supply converter, a power transmission communication controller and a plurality of switch units. The power transmission communication controller calculates a first communication time between the USB power supply device with the power supply switching function and a first electronic device; the power transmission communication controller calculates a second communication time between the USB power supply device with the power supply switching function and a second electronic device; the USB power supply device with the power supply switching function utilizes a time difference between the first communication time and the second communication time to switch the switch units to supply power to the first electronic device and the second electronic device.
Description
Technical Field
The present invention relates to a usb power supply device, and more particularly, to a usb power supply device with power switching function.
Background
the type-C USB PD (power delivery) is to support multiple outputs to supply power to a plurality of electronic devices; when more than two electronic devices are connected to the type-C USB PD, the fast charging voltage required by each electronic device may be different (may be 9, 12, 15 or 20 volts), and the communication time between the type-C USB PD and each electronic device (communication content: the type-C USB PD can provide several voltages, the required voltage of the electronic device, etc.) may also be different; therefore, a related art type-C USB PD includes a plurality of power converters respectively corresponding to different power output terminals and different electronic devices; however, since many power converters are included, the cost of such a related art type-C USB PD is very high.
Another related art type-C USB PD only includes one power converter, but since the communication time between the type-C USB PD and each electronic device may be different, such type-C USB PD only includes one power converter, when connecting more than two electronic devices, uniformly outputs only 5 volts, so as to avoid damaging the electronic devices that may exist and only require 5 volts; for example, if one electronic device requires 9 volts and another electronic device requires only 5 volts, then an electronic device requiring only 5 volts would be damaged if the type-C USB PD outputs 9 volts. In other words, for such a type-C USB PD that includes only one power converter, even though two or more connected electronic devices all require the same voltage that is not 5 volts (e.g., both require 9 volts), such a type-C USB PD outputs only 5 volts uniformly, unfortunately.
Disclosure of Invention
In order to solve the above problems, the present invention provides a usb power supply device with power switching function.
To achieve the above object, the usb power supply device with power switching function of the present invention is applied to a first electronic device and a second electronic device, and comprises: a power converter; a power delivery communication controller electrically connected to the power converter; a first switch unit electrically connected to the power converter, the power delivery communication controller and the first electronic device; and a second switch unit electrically connected to the power converter, the power delivery communication controller and the second electronic device. Wherein the power transmission communication controller calculates a first communication time between the USB power supply device with the power switching function and the first electronic device; the power transmission communication controller calculates a second communication time between the USB power supply device with the power supply switching function and the second electronic device; the USB power supply device with the power supply switching function utilizes a time difference between the first communication time and the second communication time to control the first switch unit or the second switch unit to supply power to the first electronic device and the second electronic device so as to drive the first electronic device and the second electronic device.
The invention has the effect that the universal serial bus power supply device can provide more than 5 volts for more than two electronic devices, but only needs to utilize one power converter.
For a further understanding of the technology, means, and efficacy of the invention to be achieved, reference should be made to the following detailed description of the invention and accompanying drawings which are believed to be in full and illustrative of the objects, features, and characteristics of the invention, and which are provided for purposes of reference and description only and not intended to be limiting.
The invention is described in detail below with reference to the drawings and specific examples, but the invention is not limited thereto.
Drawings
Fig. 1 is a block diagram of a usb power supply apparatus with power switching function according to the present invention.
FIG. 2 is a timing diagram of an embodiment of a USB power supply apparatus with power switching function according to the present invention.
Fig. 3 is a flowchart of a method for applying the usb power supply apparatus with power switching function according to the present invention.
Wherein, the reference numbers:
universal serial bus power supply device 10 with power supply switching function
First electronic device 20
Second electronic device 30
Power delivery communication controller 104
Step S02-26
Detailed Description
The invention will be described in detail with reference to the following drawings, which are provided for illustration purposes and the like:
in the present invention, numerous specific details are provided to provide a thorough understanding of embodiments of the invention; one skilled in the relevant art will recognize, however, that the invention can be practiced without one or more of the specific details; in other instances, well-known details are not shown or described to avoid obscuring aspects of the invention. The technical content and the detailed description of the invention are described as follows with the accompanying drawings:
please refer to fig. 1, which is a block diagram of a usb power supply apparatus with power switching function according to the present invention. A USB power supply device 10 (such as type-C USB PD) with power switching function is applied to a first electronic device 20, a second electronic device 30 and a power source 40 (such as AC power, DC power or battery for supplying power to the power converter 102); the usb power supply apparatus 10 with power switching function includes a power converter 102, a power transmission communication controller 104, a first switch unit 1061, a second switch unit 1062, and a storage unit 108; the elements are electrically connected to each other.
It should be understood that fig. 1 only includes two electronic devices (the first electronic device 20 and the second electronic device 30), but the practical application is not limited thereto, and may include more than three electronic devices; fig. 1 only includes two switch units (the first switch unit 1061 and the second switch unit 1062), but the practical application is not limited thereto, and may include more than three switch units. The power transmission communication controller 104 can control the power converter 102 to convert and output a dc voltage of 5, 9, 12, 15 or 20 volts, and can control the first switch unit 1061 and the second switch unit 1062 to be conductive or non-conductive to determine whether the voltage generated by the power converter 102 can be output to the corresponding electronic device, and the power transmission communication controller 104 can further control (switch) the first switch unit 1061 and the second switch unit 1062 to determine the voltage output to the first electronic device 20 and the second electronic device 30; for example, although the power converter 102 transmits 9 v dc voltage to the second switch unit 1062, the power transmission communication controller 104 can switch the second switch unit 1062 such that the second switch unit 1062 outputs 5 v dc voltage to the second electronic device 30.
The main concept of the invention is as follows: the power delivery communication controller 104 calculates a first communication time between the usb power supply device 10 with power switching function and the first electronic device 20; the power transmission communication controller 104 calculates a second communication time between the usb power supply apparatus 10 with power switching function and the second electronic apparatus 30; the usb power supply device 10 with power switching function utilizes a time difference between the first communication time and the second communication time to control (switch) the first switch unit 1061 or the second switch unit 1062 (to complete communication with the first electronic device 20 or the second electronic device 30) to supply power to the first electronic device 20 and the second electronic device 30 to drive the first electronic device 20 and the second electronic device 30. The storage unit 108 is configured to store the first communication time, the second communication time, and the time difference; the time difference is greater than 0 seconds.
The first communication time is defined as: the USB power supply device 10 with power switching function sends a first initial communication signal until the USB power supply device 10 with power switching function receives a first request signal. The first initial communication signal sent by the usb power supply device 10 with power switching function is transmitted to the first electronic device 20, the first demand signal received by the usb power supply device 10 with power switching function is transmitted by the first electronic device 20, and the first demand signal indicates a magnitude of a demand voltage of the first electronic device 20.
The second communication time is defined as: the USB power supply device with power switching function 10 sends a second initial communication signal until the USB power supply device with power switching function 10 receives a second request signal. Wherein, the second initial communication signal sent by the usb power supply device 10 with power switching function is transmitted to the second electronic device 30, the second request signal received by the usb power supply device 10 with power switching function is transmitted by the second electronic device 30, and the second request signal indicates the magnitude of the request voltage of the second electronic device 30.
In general, the starting situation of the present invention is: first, the first electronic device 20 is already connected to the usb power supply device 10 with power switching function and the usb power supply device 10 with power switching function already supplies power to the first electronic device 20 to drive the first electronic device 20 (this means that the usb power supply device 10 with power switching function has already communicated with the first electronic device 20 and knows the first request signal and the first communication time). Then, if the second electronic device 30 is to be connected to the usb power supply device 10 with power switching function and after the second electronic device 30 is connected to the usb power supply device 10 with power switching function, the usb power supply device 10 with power switching function stops supplying power to the first electronic device 20, the usb power supply device 10 with power switching function communicates with the second electronic device 30, so that the power transmission communication controller 104 calculates the second communication time between the usb power supply device 10 with power switching function and the second electronic device 30 and obtains the second demand signal and the second communication time; then, the usb power supply apparatus 10 with power switching function also stops communicating with the second electronic apparatus 30; then, the present invention first determines whether the magnitude of the required voltage of the first electronic device 20 indicated by the first demand signal is equal to the magnitude of the required voltage of the second electronic device 30 indicated by the second demand signal; if the two are different, since only one power converter 102 is provided, the power converter 102 will only output 5 volts after the usb power device 10 with power switching function is powered on again and communicates with the first electronic device 20 and the second electronic device 30 again (since the usb power device 10 with power switching function stops supplying power to the first electronic device 20 and the usb power device 10 with power switching function also stops communicating with the second electronic device 30, the usb power device 10 with power switching function will communicate with the second electronic device 30 again after being powered on again); however, if the two are the same, the present invention includes the following two situations, which are detailed below:
1. if the second communication time is longer than the first communication time, then: the power delivery communication controller 104 subtracts the first communication time from the second communication time to obtain the time difference; the usb power supply device 10 with power switching function transmits the first initial communication signal to the first electronic device 20, and simultaneously the usb power supply device 10 with power switching function transmits the second initial communication signal to the second electronic device 20; after the first communication time, the first electronic device 20 completes communication with the usb power supply device with power switching function 10, so that the usb power supply device with power switching function 10 outputs the required voltage of the first electronic device 20 indicated by the first demand signal (equal to the required voltage of the second electronic device 30 indicated by the second demand signal, such as 9 v voltage) to the first electronic device 20 (i.e. the power transmission communication controller 104 controls the power converter 102 to convert and output the 9 v voltage to the first switch unit 1061 and the second switch unit 1062; i.e. at this time, the power transmission communication controller 104 completely turns on the first switch unit 1061 to transmit the 9 v voltage generated by the power converter 102 to the first electronic device 20), however, the power transmission communication controller 104 switches the second switch unit 1062 receiving the 9 v voltage to convert the 9 v voltage to output 5 v voltage to the second electronic device 30 for the time difference (to maintain communication with the second electronic device 30, since 5 v voltage is required during communication). After the time difference (representing that the second electronic device 30 also completes communication with the usb power supply device with power switching function 10), the usb power supply device with power switching function 10 outputs the required voltage of the second electronic device 30 (equal to the required voltage of the first electronic device 20 indicated by the first required signal, such as the 9 v voltage) indicated by the second required signal to the second electronic device 30 (i.e., at this time, the power transmission communication controller 104 completely turns on the second switch unit 1062 to transmit the 9 v voltage generated by the power converter 102 to the second electronic device 30).
2. If the second communication time is not greater than the first communication time, then: the power delivery communication controller 104 subtracts the second communication time from the first communication time to obtain the time difference; the usb power supply device 10 with power switching function transmits the first initial communication signal to the first electronic device 20, and simultaneously the usb power supply device 10 with power switching function transmits the second initial communication signal to the second electronic device 20; after the second communication time, the second electronic device 30 completes communication with the usb power supply device with power switching function 10, so that the usb power supply device with power switching function 10 outputs the required voltage of the second electronic device 30 (equal to the required voltage of the first electronic device 20, such as 9 v voltage, indicated by the first demand signal) indicated by the second demand signal to the second electronic device 30 (i.e. the power transmission communication controller 104 controls the power converter 102 to convert and output the 9 v voltage to the first switch unit 1061 and the second switch unit 1062; i.e. at this time, the power transmission communication controller 104 completely turns on the second switch unit 1062 to transmit the 9 v voltage generated by the power converter 102 to the second electronic device 30), however, the power delivery communication controller 104 switches the first switch unit 1061 receiving the 9 v voltage to convert the 9 v voltage to output 5 v voltage to the first electronic device 20 for the time difference (to maintain communication with the first electronic device 20, since 5 v voltage is required during communication). After the time difference (representing that the first electronic device 20 also completes communication with the usb power supply device with power switching function 10), the usb power supply device with power switching function 10 outputs the required voltage of the first electronic device 20 indicated by the first requirement signal (equal to the required voltage of the second electronic device 30 indicated by the second requirement signal, such as the 9 v voltage) to the first electronic device 20 (i.e., at this time, the power transmission communication controller 104 completely turns on the first switch unit 1061 so that the 9 v voltage generated by the power converter 102 is transmitted to the first electronic device 20).
In other words, if the magnitude of the required voltage of the first electronic device 20 indicated by the first demand signal is equal to the magnitude of the required voltage of the second electronic device 30 indicated by the second demand signal (for example, the magnitude of the required voltage of the first electronic device 20 indicated by the first demand signal is, for example, 9 volts, i.e., greater than 5 volts, and equal to the magnitude of the required voltage of the second electronic device 30 indicated by the second demand signal is, for example, 9 volts), the usb power supply device 10 with power switching function utilizes the above condition to transmit the magnitude of the required voltage of the first electronic device 20 indicated by the first demand signal to the first electronic device 20 and the second electronic device 30 to drive the first electronic device 20 and the second electronic device 30.
Please refer to fig. 2, which is a timing diagram of an embodiment of the usb power supply apparatus with power switching function according to the present invention; please refer to fig. 1 at the same time; fig. 2 illustrates that the second communication time is longer than the first communication time. In FIG. 2: the first waveform from top to bottom represents that the first electronic device 20 is connected to the usb power device alone, it can be seen that the first communication time between the first electronic device 20 and the usb power device is 100ms (150ms-50ms is 100ms), and the required voltage of the first electronic device 20 is 9 volts. The second waveform from top to bottom represents that the second electronic device 30 is connected to the usb power device alone, it can be seen that the second communication time between the second electronic device 30 and the usb power device is 150ms (200ms-50ms is 150ms), and the required voltage of the second electronic device 30 is 9 volts. The third waveform from top to bottom represents the timing of the first electronic device 20 and the USB device after the power-up is resumed. The fourth waveform from top to bottom represents the timing of the second electronic device 30 and the USB device after the power is turned on again; after the first communication time, the power transmission communication controller 104 switches the second switch unit 1062 to output 5 v to the second electronic device 30 for the time difference (maintained for 50ms to maintain communication with the second electronic device 30). Therefore, the usb power supply apparatus 10 with power switching function can provide the same voltage (e.g. 9 volts) to the two electronic devices.
Please refer to fig. 3, which is a flowchart illustrating a method for applying the usb power supply apparatus with power switching function according to the present invention, which can also be referred to as a power supply method of the usb power supply apparatus with power switching function; please also refer to fig. 1. The power supply method of the universal serial bus power supply device with the power supply switching function comprises the following steps:
step S02: the first electronic device 20 is connected. That is, the first electronic device 20 is connected to the usb power supply device 10 with power switching function; the process then proceeds to step S04.
Step S04: and (6) communication is carried out. That is, the usb power supply apparatus 10 with power switching function (outputting 5 volts) communicates with the first electronic apparatus 20, so that the usb power supply apparatus 10 with power switching function knows the first request signal and the first communication time; the process then proceeds to step S06.
Step S06: power is supplied to the first electronic device 20. That is, the usb power supply apparatus 10 with power switching function supplies power to the first electronic apparatus 20 according to the magnitude of the required voltage of the first electronic apparatus 20 indicated by the first requirement signal to drive the first electronic apparatus 20; the process then proceeds to step S08.
Step S08: detecting whether the second electronic device 30 is plugged in. That is, the usb power supply apparatus with power switching function 10 detects whether the second electronic device 30 is plugged into the usb power supply apparatus with power switching function 10. If not (the second electronic device 30 is not inserted), go back to step S06; if so (with the second electronic device 30 inserted), the process proceeds to step S10.
Step S10: the first electronic device 20 is powered off and the second electronic device 30 communicates with the first electronic device. That is, the usb power supply apparatus with power switching function 10 stops supplying power to the first electronic apparatus 20 according to the magnitude of the required voltage of the first electronic apparatus 20 indicated by the first requirement signal, and the usb power supply apparatus with power switching function 10 (outputting 5 volts) communicates with the second electronic apparatus 30, so that the usb power supply apparatus with power switching function 10 knows the second requirement signal and the second communication time; the process then proceeds to step S12.
Step S12: the second electronic device 30 is powered down. That is, the usb power supply apparatus 10 with power switching function stops communicating with the second electronic apparatus 30; the process then proceeds to step S14.
Step S14: whether the required voltages are the same. That is, the usb power supply apparatus 10 with power switching function determines whether the magnitude of the required voltage of the first electronic device 20 indicated by the first requirement signal is equal to the magnitude of the required voltage of the second electronic device 30 indicated by the second requirement signal; if the two are different, go to step S16; if both are the same, the flow proceeds to step S18.
Step S16: outputting 5 volts. That is, after the power is turned on again, the usb power supply apparatus 10 with power switching function will output only 5 volts.
Step S18: judging whether the second communication time is longer than the first communication time; if so, go to step S20; if not, the flow proceeds to step S24. The invention also subtracts the first communication time from the second communication time to obtain the time difference.
Step S20: the first electronic device 20 and the second electronic device 30 are powered on simultaneously; after the first communication time, the power transmission communication controller 104 switches the second switch unit 1062 to output 5 v to the second electronic device 30 for the time difference. That is, the usb power supply apparatus with power switching function 10 transmits the first initial communication signal to the first electronic apparatus 20, and simultaneously the usb power supply apparatus with power switching function 10 transmits the second initial communication signal to the second electronic apparatus 20; after the first communication time, the first electronic device 20 completes communication with the usb power supply device with power switching function 10, so that the usb power supply device with power switching function 10 outputs the required voltage of the first electronic device 20 indicated by the first requirement signal (equal to the required voltage of the second electronic device 30 indicated by the second requirement signal) to the first electronic device 20, but the power transmission communication controller 104 switches the second switch unit 1062 to output 5 v to the second electronic device 30 for the time difference (to maintain communication with the second electronic device 30); referring back to fig. 2, that is, the power transmission communication controller 104 switches the second switch unit 1062 to output 5 volts (for 50ms) to the second electronic device 30 (for maintaining communication with the second electronic device 30). Next, the process proceeds to step S22.
Step S22: after the time difference, the usb power supply apparatus 10 with power switching function outputs the required voltage of the second electronic device 30 indicated by the second required signal to the second electronic device 30. That is, after the time difference, the second electronic device 30 also completes communication with the usb power supply device with power switching function 10, so that the usb power supply device with power switching function 10 outputs the required voltage of the second electronic device 30 (equal to the required voltage of the first electronic device 20 indicated by the first required signal) indicated by the second required signal to the second electronic device 30.
Step S24: the first electronic device 20 and the second electronic device 30 are powered on simultaneously; after the second communication time, the power transmission communication controller 104 switches the first switch unit 1061 to output 5 v to the first electronic device 20 for the time difference. That is, the usb power supply apparatus with power switching function 10 transmits the first initial communication signal to the first electronic apparatus 20, and simultaneously the usb power supply apparatus with power switching function 10 transmits the second initial communication signal to the second electronic apparatus 20; after the second communication time, the second electronic device 30 completes communication with the usb power supply device with power switching function 10, so that the usb power supply device with power switching function 10 outputs the required voltage of the second electronic device 30 (equal to the required voltage of the first electronic device 20 indicated by the first requirement signal) indicated by the second requirement signal to the second electronic device 30, but the power transmission communication controller 104 switches the first switch unit 1061 to output 5 v to the first electronic device 20 for the time difference (to maintain communication with the first electronic device 20). Next, the process proceeds to step S26.
Step S26: after the time difference, the usb power supply apparatus 10 with power switching function outputs the required voltage of the first electronic device 20 indicated by the first required signal to the first electronic device 20. That is, after the time difference, the first electronic device 20 also completes communication with the usb power supply device with power switching function 10, so that the usb power supply device with power switching function 10 outputs the required voltage of the first electronic device 20 indicated by the first requirement signal (equal to the required voltage of the second electronic device 30 indicated by the second requirement signal) to the first electronic device 20.
The invention has the effect that the universal serial bus power supply device can provide more than 5 volts for more than two electronic devices, but only needs to utilize one power converter. Furthermore, in an embodiment of the present invention, the meaning of "determining whether the magnitude of the required voltage of the first electronic device 20 indicated by the first demand signal is equal to the magnitude of the required voltage of the second electronic device 30 indicated by the second demand signal" is: determining the maximum same value among the kinds of the required voltages of the first electronic device 20 and the second electronic device 30; the meaning of the foregoing "if the two are different" is: the maximum equivalence value among the kinds of the required voltages of the first electronic device 20 and the second electronic device 30 is only 5 volts; the meaning of the foregoing "if both are the same" is: the maximum equivalence value among the types of the required voltages of the first electronic device 20 and the second electronic device 30 is greater than 5 volts (e.g., 9 volts). For example, the required voltage of the first electronic device 20 is only 5 volts, the required voltage of the second electronic device 30 is 5 volts and 9 volts, and the maximum same value among the types of the required voltages of the first electronic device 20 and the second electronic device 30 is only 5 volts, so this condition is considered as "if the two are different". For another example, the required voltages of the first electronic device 20 have 5 volts, 9 volts and 12 volts, the required voltages of the second electronic device 30 have 5 volts and 9 volts, and the maximum equivalence value among the types of the required voltages of the first electronic device 20 and the types of the required voltages of the second electronic device 30 is 9 volts (greater than 5 volts), so this condition is considered as "if the two are the same".
The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A USB power supply device with power switching function is applied to a first electronic device and a second electronic device, and comprises:
a power converter;
a power delivery communication controller electrically connected to the power converter;
a first switch unit electrically connected to the power converter, the power delivery communication controller and the first electronic device; and
a second switch unit electrically connected to the power converter, the power transmission communication controller and the second electronic device,
wherein the power transmission communication controller calculates a first communication time between the USB power supply device with the power switching function and the first electronic device; the power transmission communication controller calculates a second communication time between the USB power supply device with the power supply switching function and the second electronic device; the USB power supply device with the power supply switching function utilizes a time difference between the first communication time and the second communication time to control the first switch unit or the second switch unit to supply power to the first electronic device and the second electronic device so as to drive the first electronic device and the second electronic device.
2. The usb power supply apparatus with power switching function according to claim 1, wherein the first communication time is defined as: sending a first initial communication signal from the USB power supply device with the power switching function until the USB power supply device with the power switching function receives a first demand signal; the first initial communication signal sent by the usb power supply device with power switching function is transmitted to the first electronic device, the first demand signal received by the usb power supply device with power switching function is transmitted by the first electronic device, and the first demand signal indicates a magnitude of a demand voltage of the first electronic device.
3. The apparatus according to claim 2, wherein the second communication time is defined as: sending a second initial communication signal from the USB power supply device with the power switching function until the USB power supply device with the power switching function receives a second demand signal; the second initial communication signal sent by the usb power supply device with power switching function is transmitted to the second electronic device, the second demand signal received by the usb power supply device with power switching function is transmitted by the second electronic device, and the second demand signal indicates a magnitude of a demand voltage of the second electronic device.
4. The device as claimed in claim 3, wherein the magnitude of the demanded voltage of the first electronic device indicated by the first demand signal is equal to the magnitude of the demanded voltage of the second electronic device indicated by the second demand signal, and the magnitude of the demanded voltage of the first electronic device indicated by the first demand signal is greater than 5 volts.
5. The USB device with power switching function of claim 4, wherein when the first electronic device is connected to the USB device with power switching function and the USB device with power switching function is powering the first electronic device to drive the first electronic device: if the second electronic device is to be connected with the USB power supply device with the power switching function and after the second electronic device is connected with the USB power supply device with the power switching function, the USB power supply device with the power switching function stops supplying power to the first electronic device, so that the power transmission communication controller calculates the second communication time between the USB power supply device with the power switching function and the second electronic device, and then the USB power supply device with the power switching function stops communicating with the second electronic device.
6. The apparatus according to claim 5, wherein if the second communication time is longer than the first communication time, then: the power transmission communication controller subtracts the first communication time from the second communication time to obtain the time difference; the USB power supply device with the power switching function transmits the first initial communication signal to the first electronic device, and simultaneously transmits the second initial communication signal to the second electronic device; after the first communication time, the power transmission communication controller switches the second switch unit to output a voltage of 5 volts to the second electronic device by the time difference.
7. The USB power supply device with power switching function of claim 6, wherein after the first communication time, the USB power supply device with power switching function outputs the required voltage of the first electronic device indicated by the first required signal to the first electronic device; after the time difference, the USB power supply device with the power switching function outputs the required voltage of the second electronic device indicated by the second required signal to the second electronic device.
8. The USB device of claim 5, wherein if the second communication time is not greater than the first communication time, then: the power transmission communication controller subtracts the second communication time from the first communication time to obtain the time difference; the USB power supply device with the power switching function transmits the first initial communication signal to the first electronic device, and simultaneously transmits the second initial communication signal to the second electronic device; after the second communication time, the power transmission communication controller switches the first switch unit to output a voltage of 5 volts to the first electronic device by the time difference.
9. The apparatus of claim 8, wherein after the second communication time, the apparatus outputs the required voltage of the second electronic device indicated by the second demand signal to the second electronic device; after the time difference, the USB power supply device with the power switching function outputs the required voltage of the first electronic device indicated by the first required signal to the first electronic device.
10. The apparatus of claim 1, further comprising:
a memory unit electrically connected to the power delivery communication controller,
wherein the storage unit is used for storing the first communication time, the second communication time and the time difference; the time difference is greater than 0 seconds.
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| US20140117923A1 (en) * | 2012-10-29 | 2014-05-01 | Qualcomm Incorporated | High voltage dedicated charging port |
| JP2015076954A (en) * | 2013-10-08 | 2015-04-20 | シャープ株式会社 | Electronic apparatus and information processing system |
| CN108062286A (en) * | 2016-11-07 | 2018-05-22 | 全汉企业股份有限公司 | Universal serial bus concentrator |
| TW201836238A (en) * | 2017-03-16 | 2018-10-01 | 宏碁股份有限公司 | Electronic device |
| US20180351380A1 (en) * | 2017-05-30 | 2018-12-06 | Canon Kabushiki Kaisha | Electronic apparatus and control method thereof |
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