TWI696335B - Universal serial bus power-supplying apparatus with delay functions - Google Patents

Abstract

A universal serial bus power-supplying apparatus with delay functions includes a power convertor, a power delivery communication controller and a plurality of switch units. The power delivery communication controller calculates a first communication time between the universal serial bus power-supplying apparatus and a first electronic apparatus. The power delivery communication controller calculates a second communication time between the universal serial bus power-supplying apparatus and a second electronic apparatus. The universal serial bus power-supplying apparatus utilizes a time difference between the first communication time and the second communication time to simultaneously supply power to the first electronic apparatus and the second electronic apparatus to drive the first electronic apparatus and the second electronic apparatus.

Description

Universal serial bus power supply device with delay function

The invention relates to a universal serial bus power supply device, in particular to a universal serial bus power supply device with a delay function.

Type-C USB PD (power delivery) needs to support multiple outputs to power multiple electronic devices; when more than two electronic devices are connected to 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 (the communication content is: type-C USB PD can provide several voltages, and the required voltage of the electronic device Etc.) may also be different; therefore, a related art type-C USB PD will include many power converters to correspond to different power output ports and different electronic devices; however, since many power converters are included So, the cost of this type-C USB PD of related technology is very high.

Another related art type-C USB PD includes only one power converter, but since the communication time between type-C USB PD and each electronic device may be different, this type-C includes only one power converter When connecting more than two electronic devices, the USB PD will only output 5 volts to avoid damage to the electronic devices that may require only 5 volts; for example, one electronic device requires 9 volts and the other electronic device requires only 5 volts. If the type-C USB PD outputs 9 volts, it will damage electronic devices that require only 5 volts. In other words, for this type-C USB PD that includes only one power converter, even if more than two connected electronic devices require the same It is 5 volts (for example, 9 volts are required), but this type-C USB PD only outputs 5 volts, which is a pity.

In order to solve the above problems, the object of the present invention is to provide a universal serial bus power supply device with a delay function.

In order to achieve the above object of the invention, the universal serial bus power supply device with delay function of the present invention is applied to a first electronic device and a second electronic device. The universal serial bus power supply device with delay function includes : A power converter; a power transmission communication controller, the power transmission communication controller is electrically connected to the power converter; and a plurality of switch units, the switch units are electrically connected to the power converter and the power transmission Communication controller. Wherein the power transmission communication controller calculates a first communication time between the general serial bus power supply device with a delay function and the first electronic device; the power transmission communication controller calculates the first communication time between the delay function A second communication time between the universal serial bus power supply device and the second electronic device; the universal serial bus power supply device with a delay function utilizes a distance between the first communication time and the second communication time A time difference between them simultaneously supplies power to the first electronic device and the second electronic device to drive the first electronic device and the second electronic device.

The effect of the present invention is that the universal serial bus power supply device can simultaneously provide a voltage greater than 5 volts to more than two electronic devices, but only one power converter is required.

In order to further understand the technology, means and effects of the present invention to achieve the intended purpose, please refer to the following detailed description and drawings of the present invention. I believe the purpose, features and characteristics of the present invention can be obtained in depth and specific For the sake of understanding, the attached drawings are provided for reference and explanation only, and are not intended to limit the present invention.

10: Universal serial bus power supply device with delay function

20: The first electronic device

30: Second electronic device

40: Power source

102: power converter

104: Power transmission communication controller

106: switch unit

108: memory unit

S02~34: Step

FIG. 1 is a block diagram of a universal serial bus power supply device with a delay function according to the present invention.

2 is a timing diagram of the delayed power transmission scheme of the present invention.

FIG. 3 is a timing diagram of the delayed communication scheme of the present invention.

4 is a flowchart of a method (delayed power transmission scheme) of a universal serial bus power supply device with a delay function of the present invention.

FIG. 5 is a flowchart of a method (delayed communication scheme) for applying the universal serial bus power supply device with a delay function of the present invention.

In this disclosure, many specific details are provided to provide a thorough understanding of specific embodiments of the present invention; however, those skilled in the art should be aware that in the absence of one or more of these specific details, The invention can be practiced; in other cases, well-known details are not shown or described to avoid obscuring the main technical features of the invention. The technical content and detailed description of the present invention are explained below with reference to the drawings: Please refer to FIG. 1, which is a block diagram of a universal serial bus power supply device with a delay function according to the present invention. A universal serial bus power supply device 10 with delay function (for example, type-C USB PD) is applied to a first electronic device 20, a second electronic device 30, and a power source 40 (for example, AC power, DC Power supply or battery to supply power to the following power converter 102); the universal serial bus power supply device 10 with a delay function includes a power converter 102, a power transmission communication controller 104, a plurality of switch units 106 and A memory unit 108; the above-mentioned components are electrically connected to each other. It should be noted that Figure 1 only contains two electronic devices, but the actual application is not limited to this, and can include more than three Electronic device. The power transmission communication controller 104 can control the power converter 102 to convert and output 5, 9, 12, 15 or 20 volts DC voltage, and can control the switch units 106 to be conductive or non-conductive to determine the power conversion Can the voltage generated by the converter 102 be output to the corresponding electronic device.

The main concept of the present invention is: the power transmission communication controller 104 calculates a first communication time between the universal serial bus power supply device 10 with a delay function and the first electronic device 20; the power transmission communication The controller 104 calculates a second communication time between the delayed serial bus power supply device 10 and the second electronic device 30; the delayed serial bus power supply device 10 uses the A time difference between the first communication time and the second communication time simultaneously supplies 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. Wherein, the memory unit 108 is used 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: from the time when the universal serial bus power supply device with delay function 10 sends a first start communication signal until the universal serial bus power supply device with delay function 10 receives a first Demand signal. Wherein, the first start communication signal sent by the universal serial bus power supply device 10 with a delay function is sent to the first electronic device 20, and the universal serial bus power supply device 10 with a delay function receives The first demand signal is transmitted by the first electronic device 20, and the first demand signal is used to indicate the magnitude of the demand voltage of the first electronic device 20.

The second communication time is defined as: from the second serial communication power supply device 10 with a delay function sending a second start communication signal, until the general serial bus power supply device with a delay function 10 receives a first Two demand signals. Wherein, the second initial communication signal sent by the universal serial bus power supply device with a delay function 10 is sent to the second electronic device 30, and received by the universal serial bus power supply device with a delay function 10 The second demand signal is determined by the The second electronic device 30 transmits the second demand signal to indicate the required voltage of the second electronic device 30.

Generally speaking, the starting condition of the present invention is: first, the first electronic device 20 has been connected to the universal serial bus power supply device 10 with a delay function and the universal serial bus power supply device 10 with a delay function Power has been supplied to the first electronic device 20 to drive the first electronic device 20 (this means that the universal serial bus power supply device 10 with a delay function has communicated with the first electronic device 20 and is informed that the first Demand signal and the first communication time). Then, if the second electronic device 30 is to be connected to the universal serial bus power supply device 10 with a delay function and after the second electronic device 30 is connected to the universal serial bus power supply device 10 with a delay function, then the The universal serial bus power supply device 10 with a delay function stops supplying power to the first electronic device 20, and the universal serial bus power supply device 10 with a delay function communicates with the second electronic device 30 so that the power transmission communication The controller 104 calculates the second communication time between the universal serial bus power supply device 10 with a delay function and the second electronic device 30 and learns the second demand signal and the second communication time; , The universal serial bus power supply device 10 with a delay function also stops communication with the second electronic device 30; afterwards, the present invention will first determine the first electronic device 20 indicated by the first demand signal Whether the magnitude of the demand voltage is equal to the magnitude of the demand voltage of the second electronic device 30 indicated by the second demand signal; if the two are different, since the present invention has only one power converter 102, the power converter 102 After the universal serial bus power supply device 10 with a delay function and the first electronic device 20 and the second electronic device 30 are re-powered and communicated again (because the aforementioned universal serial bus power supply with a delay function is powered The device 10 has stopped supplying power to the first electronic device 20, and the universal serial bus power supply device 10 with a delay function has also stopped communicating with the second electronic device 30, so communication will be resumed after the power is turned back on Once), only 5 volts will be output; but if the two are the same, the present invention provides two delay schemes: delayed power transmission scheme and delayed communication scheme, which are detailed as follows:

(1) The delayed power transmission plan includes the following two conditions:

1. If the second communication time is greater than the first communication time, then: the power transmission communication controller 104 subtracts the first communication time from the second communication time to obtain the time difference; first power on again to make the The universal serial bus power supply device 10 with a delay function transmits the second initial communication signal to the second electronic device 30, and after the time difference passes, the universal serial bus power supply device 10 with a delay function transmits The first initial communication signal is sent to the first electronic device 20. Therefore, the two electronic devices can complete the communication with the delaying universal serial bus power supply device 10 at the same time, and the delaying universal serial bus power supply device 10 can simultaneously provide the same voltage to the two electronic devices.

2. If the second communication time is not greater than the first communication time, then: the power transmission communication controller 104 subtracts the first communication time from the first communication time to obtain the time difference; first power on again, so that The universal serial bus power supply device 10 with a delay function transmits the first initial communication signal to the first electronic device 20, and after the time difference passes, the universal serial bus power supply device 10 with a delay function transmits The second initial communication signal is sent to the second electronic device 30. Therefore, the two electronic devices can complete the communication with the delaying universal serial bus power supply device 10 at the same time, and the delaying universal serial bus power supply device 10 can simultaneously provide the same voltage to the two electronic devices.

(2) The delayed communication plan includes the following two situations:

1. If the second communication time is greater than the first communication time, then: the power transmission communication controller 104 subtracts the first communication time from the second communication time to obtain the time difference; first power on again to make the The universal serial bus power supply device 10 with a delay function transmits the first initial communication signal to the first electronic device 20, and at the same time the universal serial bus power supply device 10 with a delay function transmits the second initial communication signal To the second electronic device 30, after that, during the communication between the universal serial bus power supply device 10 with a delay function and the first electronic device 20, the delayed function The capable universal serial bus power supply device 10 intentionally delays the time difference before replying to the first electronic device 20. Therefore, the two electronic devices can complete the communication with the delaying universal serial bus power supply device 10 at the same time, and the delaying universal serial bus power supply device 10 can simultaneously provide the same voltage to the two electronic devices.

2. If the second communication time is not greater than the first communication time, then: the power delivery communication controller 104 subtracts the first communication time from the first communication time to obtain the time difference; first power on again, the The delayed general-purpose serial bus power supply device 10 transmits the first initial communication signal to the first electronic device 20, and at the same time, the delayed general-purpose serial bus power supply device 10 transmits the second initial communication signal to The second electronic device 30, and then, during the communication between the delaying universal serial bus power supply device 10 and the second electronic device 30, the delaying universal serial bus power supply device 10 is intentionally delayed Only the time difference answers the second electronic device 30. Therefore, the two electronic devices can complete the communication with the delaying universal serial bus power supply device 10 at the same time, and the delaying universal serial bus power supply device 10 can simultaneously provide the same voltage to the two electronic devices.

In other words, if the magnitude of the demand voltage of the first electronic device 20 indicated by the first demand signal is equal to the magnitude of the demand voltage of the second electronic device 30 indicated by the second demand signal (eg, the first The magnitude of the demand voltage of the first electronic device 20 indicated by the demand signal is, for example, 9 volts, that is, greater than 5 volts, which is equal to the magnitude of the demand voltage of the second electronic device 30 indicated by the second demand signal, 9 volts), Then, the universal serial bus power supply device 10 with a delay function uses the above-mentioned schemes to simultaneously transmit the voltage of the magnitude of the demand voltage of the first electronic device 20 indicated by the first demand signal to the first electronics The device 20 and the second electronic device 30 drive the first electronic device 20 and the second electronic device 30.

Please refer to FIG. 2, which is a timing diagram of the delayed power transmission scheme of the present invention; FIG. 2 takes the second communication time greater than the first communication time as an example. In Figure 2: The first waveform generation from top to bottom The first electronic device 20 is separately connected to the universal serial bus power supply device. It can be seen that the first communication time between the first electronic device 20 and the universal serial bus power supply device is 100ms (150ms-50ms=100ms) 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 separately connected to the universal serial bus power supply device. It can be seen that the second communication time between the second electronic device 30 and the universal serial bus power supply device is 150ms (200ms-50ms=150ms), and the required voltage of the second electronic device 30 is 9 volts. The third waveform from top to bottom represents that the time difference (150ms-100ms=50ms) has been learned from the previous communication, so after re-powering on, after the time difference, the universal serial bus power supply device with delay function Only 10 starts to communicate with the first electronic device 20 (that is, the first initial communication signal is sent to the first electronic device 20). The fourth waveform from top to bottom represents the original waveform of the second electronic device 30 after power-on again. Therefore, the two electronic devices can complete the communication with the delaying universal serial bus power supply device 10 at the same time, and the delaying universal serial bus power supply device 10 can simultaneously provide the same voltage for the two electronic devices ( For example 9 volts).

Please refer to FIG. 3, which is a timing diagram of the delayed communication scheme of the present invention; FIG. 3 takes the second communication time greater than the first communication time as an example. In FIG. 3, the descriptions of the first, second, and four waveforms from top to bottom are the same as the descriptions of the first, second, and four waveforms from top in FIG. 2, so they are not described here. In Figure 3, the third waveform from top to bottom represents that the time difference (150ms-100ms=50ms) has been learned from the previous communication, so after re-powering, the universal serial bus with delay function is powered During the communication between the device 10 and the first electronic device 20, the universal serial bus power supply device 10 with a delay function intentionally delays the time difference before replying to the first electronic device 20; that is, the first electronic device 20 The original first communication time (100 ms) plus the time difference (50 ms) is equal to the second communication time (150 ms) of the second electronic device 30. Therefore, the two electronic devices can also complete communication with the universal serial bus power supply device 10 with a delay function at the same time. The late-function universal serial bus power supply device 10 can simultaneously provide the same voltage (for example, 9 volts) to two electronic devices.

Please refer to FIG. 4, which is a flow chart of a method (delayed power transmission scheme) for applying a universal serial bus power supply device with a delay function according to the present invention. Power supply method; please also refer to Figure 1. The power supply method of the universal serial bus power supply device with delay function includes the following steps:

Step S02: Connect the first electronic device 20. That is, the first electronic device 20 is connected to the universal serial bus power supply device 10 with a delay function; then, step S04 is entered.

Step S04: Communicate. That is, the general-purpose serial bus power supply device 10 with a delay function (output 5 volts) communicates with the first electronic device 20, so that the general-purpose serial bus power supply device 10 with a delay function learns the first The demand signal and the first communication time; then go to step S06.

Step S06: supply power to the first electronic device 20. That is, the universal serial bus power supply device 10 with a delay function supplies power to the first electronic device 20 according to the required voltage of the first electronic device 20 indicated by the first demand signal to drive the first electronic device 20 Device 20; Then go to step S08.

Step S08: Detect whether the second electronic device 30 is inserted. That is, the general serial bus power supply device 10 with a delay function detects whether the second electronic device 30 is inserted into the general serial bus power supply device 10 with a delay function. If not (the second electronic device 30 is not inserted), then return to step S06; if yes (the second electronic device 30 is inserted), then go to step S10.

Step S10: The first electronic device 20 is powered off, and the second electronic device 30 communicates. That is, the universal serial bus power supply device 10 with a delay function stops supplying power to the first electronic device 20 according to the magnitude of the demand voltage of the first electronic device 20 indicated by the first demand signal, and the delay The function of the universal serial bus power supply device 10 (output 5 volts) to the second electronic device Set 30 to communicate, so that the universal serial bus power supply device 10 with the delay function is informed of the second demand signal and the second communication time; then step S12 is entered.

Step S12: The second electronic device 30 is powered off. That is, the universal serial bus power supply device 10 with a delay function stops communication with the second electronic device 30; then step S14 is entered.

Step S14: Whether the required voltage is the same. That is, the universal serial bus power supply device 10 with a delay function determines whether the magnitude of the demand voltage of the first electronic device 20 indicated by the first demand signal is equal to the magnitude of the second electronics indicated by the second demand signal The magnitude of the required voltage of the device 30; if the two are different, go to step S16; if the two are the same, go to step S18.

Step S16: output 5 volts. That is, after re-powering on, it will communicate again, and after the communication is completed again, the universal serial bus power supply device 10 with a delay function will output only 5 volts.

Step S18: determine whether the second communication time is greater than the first communication time; if yes, go to step S20; if no, go to step S22. The present invention also subtracts the first communication time from the second communication time to obtain the time difference.

Step S20: The second electronic device 30 is powered on first. After the time difference, the first electronic device 20 is powered on; then, step S24 is entered. That is, first, the universal serial bus power supply device 10 with a delay function transmits the second start communication signal to the second electronic device 30, and after the time difference has elapsed, the universal serial bus bar with a delay function Only the power supply device 10 transmits the first initial communication signal to the first electronic device 20.

Step S22: The first electronic device 20 is powered on first. After the time difference, the second electronic device 30 is powered on; then, step S24 is entered. That is, first, the universal serial bus power supply device 10 with a delay function transmits the first start communication signal to the first electronic device 20, and After the time difference, the universal serial bus power supply device 10 with a delay function transmits the second initial communication signal to the second electronic device 30.

Step S24: At the same time, complete the communication to supply power. That is, the two electronic devices can complete the communication with the delayed serial bus power supply device 10 at the same time, and the delayed serial bus power supply device 10 can simultaneously provide the same voltage for the two electronic devices (That is, the voltage of the first electronic device 20 indicated by the first demand signal is also equal to the voltage of the second electronic device 30 indicated by the second demand signal).

Please refer to FIG. 5, which is a flowchart of a method (delayed communication scheme) for applying a universal serial bus power supply device with a delay function according to the present invention. The contents described in FIG. 5 are the same as those in FIG. 4. . Furthermore, after step S14, if the demand voltages of the two are the same, the process proceeds to step S26.

Step S26: Simultaneous power transmission; then, proceed to step S28. That is, the universal serial bus power supply device 10 with a delay function transmits the first start communication signal to the first electronic device 20, and at the same time, the universal serial bus power supply device 10 with a delay function transmits the second The communication signal is initiated to the second electronic device 30.

Step S28: determine whether the second communication time is greater than the first communication time; if yes, go to step S30; if no, go to step S32. The present invention also subtracts the first communication time from the second communication time to obtain the time difference.

Step S30: delay the time difference before replying to the first electronic device 20; then, proceed to step S34. That is, in the communication process between the universal serial bus power supply device 10 with a delay function and the first electronic device 20, the universal serial bus power supply device 10 with a delay function delays the time difference before replying to the first Electronic device 20.

Step S32: delay the time difference before replying to the second electronic device 30; then, proceed to step S34. That is, in the universal serial bus power supply device 10 with the delay function and the second electronic During the communication process of the device 30, the universal serial bus power supply device 10 with a delay function delays the time difference before replying to the second electronic device 30.

Step S34: At the same time, complete the communication to supply power. That is, the two electronic devices can complete the communication with the delayed serial bus power supply device 10 at the same time, and the delayed serial bus power supply device 10 can simultaneously provide the same voltage for the two electronic devices (That is, the voltage of the first electronic device 20 indicated by the first demand signal is also equal to the voltage of the second electronic device 30 indicated by the second demand signal).

The effect of the present invention is that the universal serial bus power supply device can simultaneously provide a voltage greater than 5 volts to more than two electronic devices, but only one power converter is required. Furthermore, in an embodiment of the present invention, the aforementioned “determination” whether the magnitude of the demand voltage of the first electronic device 20 indicated by the first demand signal is equal to the magnitude of the second electronic device indicated by the second demand signal The meaning of “the magnitude of the required voltage of 30” is: to determine the maximum same value among the types of the required voltage of the first electronic device 20 and the types of the required voltage of the second electronic device 30; the aforementioned “if the two are different” The meaning is: among the types of the required voltage of the first electronic device 20 and the types of the required voltage of the second electronic device 30, the maximum same value is only 5 volts; the meaning of the aforementioned "if the two are the same" is: Among the types of the required voltage of the first electronic device 20 and the types of the required voltage of the second electronic device 30, the maximum same value is greater than 5 volts (for example, 9 volts). For example, the demand voltage of the first electronic device 20 is only 5 volts, and the demand voltage of the second electronic device 30 is 5 volts and 9 volts. The maximum common value among the types of the required voltage of the device 30 is only 5 volts, so this situation is regarded as the aforementioned "if the two are different". For another example, the required voltage of the first electronic device 20 is 5 volts, 9 volts and 12 volts, the required voltage of the second electronic device 30 is 5 volts and 9 volts, the type of the required voltage in the first electronic device 20 The maximum same value among the types of the required voltage of the second electronic device 30 is 9 volts (greater than 5 volts), so this situation is regarded as the aforementioned "if both are the same".

However, the above are only preferred embodiments of the present invention, and the scope of implementation of the present invention cannot be limited, that is, all equal changes and modifications made according to the scope of the patent application of the present invention should still be covered by the patent of the invention The scope is intended to protect the category. There are many other embodiments of the present invention. Without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and modifications according to the present invention, but these corresponding changes and modifications are all It should belong to the protection scope of the patent application scope attached to the present invention. In summary, when it is known that the present invention has industrial applicability, novelty, and progress, and the structure of the present invention has not been seen in similar products and public use, it fully meets the requirements of the invention patent application, and the application is filed in accordance with the Patent Law.

10: Universal serial bus power supply device with delay function

20: The first electronic device

30: Second electronic device

40: Power source

102: power converter

104: Power transmission communication controller

106: switch unit

108: memory unit

Claims (9)

A universal serial bus power supply device with a delay function is applied to a first electronic device and a second electronic device. The universal serial bus power supply device with a delay function includes: a power converter; a power transmission A communication controller, the power transmission communication controller is electrically connected to the power converter; a plurality of switch units, the switch units are electrically connected to the power converter and the power transmission communication controller; and a memory unit, the The memory unit is electrically connected to the power transmission communication controller, wherein the power transmission communication controller calculates a first communication time between the universal serial bus power supply device with a delay function and the first electronic device; The power transmission communication controller calculates a second communication time between the delayed serial bus power supply device and the second electronic device; the delayed serial bus power supply device uses a A time difference between the first communication time and the second communication time simultaneously supplies power to the first electronic device and the second electronic device to drive the first electronic device and the second electronic device; the memory unit is It is used to store the first communication time, the second communication time and the time difference; the time difference is greater than 0 seconds. The general serial bus power supply device with a delay function as described in item 1 of the patent scope, wherein the first communication time is defined as: a first initial communication is sent from the general serial bus power supply device with a delay function Starting from the signal until the first serial communication power supply device with a delay function receives a first demand signal; wherein the first initial communication signal sent by the universal serial bus power supply device with a delay function is sent to the The first electronic device, which has a delay function The first demand signal received by the universal serial bus power supply device is transmitted by the first electronic device, and the first demand signal is used to indicate the magnitude of the demand voltage of the first electronic device. As described in item 2 of the patent application scope, a universal serial bus power supply device with a delay function, wherein the second communication time is defined as: a second start is sent from the universal serial bus power supply device with a delay function From the communication signal, until the second serial communication power supply device with the delay function receives a second demand signal; wherein the second initial communication signal sent by the general serial bus power supply device with the delay function is transmitted To the second electronic device, the second demand signal received by the universal serial bus power supply device with a delay function is transmitted by the second electronic device, and the second demand signal is used to indicate the first demand signal The size of the demand voltage of the electronic device. The universal serial bus power supply device with delay function as described in item 3 of the patent application scope, wherein the magnitude of the demand voltage of the first electronic device indicated by the first demand signal is equal to that indicated by the second demand signal The magnitude of the demand voltage of the second electronic device, and the magnitude of the demand voltage of the first electronic device indicated by the first demand signal is greater than 5 volts; the universal serial bus power supply device with a delay function transmits simultaneously The voltage of the magnitude of the demand voltage of the first electronic device indicated by the first demand signal is applied to the first electronic device and the second electronic device to drive the first electronic device and the second electronic device. The universal serial bus power supply device with a delay function as described in item 4 of the patent application scope, wherein when the first electronic device has been connected to the universal serial bus power supply device with a delay function and the delay function When the universal serial bus power supply device has supplied power to the first electronic device to drive the first electronic device: if the second electronic device is to be connected to the universal serial bus power supply device with a delay function and the second electronic device After the device is connected to the general-purpose serial bus power supply device with a delay function, the general-purpose serial bus power supply device with a delay function stops supplying power to the first electronic device, so that the power transmission communication controller calculates between General function of delay function The second communication time between the bus power supply device and the second electronic device, after which, the universal serial bus power supply device with a delay function stops communication with the second electronic device. The universal serial bus power supply device with delay function as described in item 5 of the patent application scope, wherein if the second communication time is greater than the first communication time, then: the power transmission communication controller uses the second communication time The first communication time is subtracted to obtain the time difference; first, the universal serial bus power supply device with a delay function transmits the second start communication signal to the second electronic device, and after the time difference has passed, the delayed Only the functional universal serial bus power supply device transmits the first initial communication signal to the first electronic device. The universal serial bus power supply device with delay function as described in item 5 of the patent application scope, wherein if the second communication time is not greater than the first communication time, then: the power transmission communication controller communicates the first communication Time minus the second communication time to obtain the time difference; first, the universal serial bus power supply device with a delay function transmits the first start communication signal to the first electronic device, and after the time difference has passed, the delayed Only the functional universal serial bus power supply device transmits the second initial communication signal to the second electronic device. The universal serial bus power supply device with delay function as described in item 5 of the patent application scope, wherein if the second communication time is greater than the first communication time, then: the power transmission communication controller uses the second communication time The first communication time is subtracted to obtain the time difference; the universal serial bus power supply device with a delay function transmits the first start communication signal to the first electronic device, and at the same time the universal serial bus with a delay function The power supply device transmits the second initial communication signal to the second electronic device, and then, during the communication between the power supply device with a delay function and the first electronic device, the universal string with a delay function The bus power supply device delays the time difference before replying to the first electronic device. The universal serial bus power supply device with delay function as described in item 5 of the patent application scope, wherein if the second communication time is not greater than the first communication time, then: the power delivery The communication controller subtracts the second communication time from the first communication time to obtain the time difference; the universal serial bus power supply device with a delay function transmits the first start communication signal to the first electronic device, and at the same time the The general serial bus power supply device with a delay function transmits the second initial communication signal to the second electronic device, and then, in the communication process of the general serial bus power supply device with a delay function and the second electronic device In this case, the universal serial bus power supply device with a delay function delays the time difference before replying to the second electronic device.

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