TW202030578A - Multi-port power supply apparatus and operation method thereof - Google Patents

Abstract

A multi-port power supply apparatus and an operation method thereof are provided. In an embodiment, the multi-port power supply apparatus includes a plurality of USB ports, a plurality of power converters, and a common control circuit. The USB ports include a first USB port and a second USB port. The power converters are configured to supply power to the USB ports. The common control circuit is configured to obtain power variations of the USB ports, and correspondingly control the plurality of power converters to supply power to the USB ports according to the power requirements of the plurality of USB ports. The common control circuit dynamically diverts the power difference between the first power of the first USB port at the first time and the second power of the first USB port at the second time to the second USB port.

Description

Multi-port power supply device and operation method thereof

The present invention relates to a power supply device, in particular to a multi-port power supply device with multiple ports and an operation method thereof.

Generally speaking, when a power supply device provides power to an external device through a USB port, the power supply device needs to perform a voltage conversion operation according to the rated specifications of the external device, so that the output voltage of the power supply device can meet the demand voltage of the external device . The power supply device may have multiple ports and multiple voltage converters corresponding to the multiple ports, so as to simultaneously provide power of different output voltages to multiple external devices with different required voltages. In any case, once the power configuration between the power supply device and an external device is determined, the output voltage of the traditional power supply device to the external device will remain unchanged until the external device and the power supply device The connection is severed.

On the other hand, these voltage converters of the power supply device convert the same source voltage into different output voltages. Generally speaking, this source voltage is fixed (the level of the source voltage will not change with the voltage requirements of these ports). Generally, the fixed level of this source voltage must be very high in order to meet the high voltage requirements of these ports. For example, suppose the voltage requirements of these ports fall within the range of 5V to 20V, so the fixed level of the source voltage can be 24V. When the voltage requirement of a certain port is 20V, the voltage converter of this port can convert the source voltage (ie 24V) to the output voltage (ie 20V). However, during voltage conversion, the greater the increase (or decrease) of the voltage, the lower the voltage conversion efficiency of the voltage converter. For example, when the voltage requirement of a certain port is 5V, the voltage converter of this port needs to reduce the voltage from 24V to 5V. When the voltage converter drops the voltage from 24V to 5V, the voltage conversion efficiency of the voltage converter will decrease. In the case of a lower voltage conversion efficiency, the unconverted electric energy is lost in the form of heat, so the power supply device may generate heat. Therefore, it is necessary to provide a new power supply device to solve the problem of poor voltage conversion efficiency of the conventional power supply device.

It should be noted that the content of the "prior art" paragraph is used to help understand the present invention. Part of the content (or all of the content) disclosed in the "prior art" paragraph may not be the conventional technology known to those with ordinary knowledge in the technical field. The content disclosed in the "prior art" paragraph does not mean that the content has been known to those with ordinary knowledge in the technical field before the application of the present invention.

The present invention provides a multi-port power supply device capable of improving voltage conversion efficiency and an operation method thereof.

An embodiment of the present invention provides a multi-port power supply device. The multi-port power supply device includes a plurality of USB connection ports, a plurality of power converters and a common control circuit. The multiple USB connection ports include a first USB connection port and a second USB connection port. The plurality of power converters are respectively coupled to the plurality of USB ports in a one-to-one manner. The plurality of power converters are configured to supply power to the plurality of USB ports. The common control circuit is coupled to the multiple USB ports to learn power changes of the multiple USB ports. The common control circuit is configured to correspondingly control the plurality of power converters to supply power to the plurality of USB ports according to the power requirements of the plurality of USB ports. The common control circuit dynamically transfers the power difference between the first power of the first USB port at the first time and the second power of the first USB port at the second time to the second USB port.

An embodiment of the present invention provides an operating method of a multi-port power supply device. The multi-port power supply device includes a plurality of USB ports. The multiple USB connection ports include a first USB connection port and a second USB connection port. The operation method includes: obtaining the power change of the multiple USB ports by a common control circuit; correspondingly controlling the multiple power converters according to the power requirements of the multiple USB ports by the common control circuit; and controlling according to the common control circuit , The plurality of power converters respectively supply power to the plurality of USB ports in a one-to-one manner; and the common control circuit connects the first power of the first USB port at the first time to the first USB port The power difference between the second power at the second time is dynamically transferred to the second USB port.

An embodiment of the present invention provides a multi-port power supply device. The multi-port power supply device includes a power supply circuit, multiple USB ports, multiple power converters, and a common control circuit. The power supply circuit is used to provide source power. A plurality of power converters are respectively coupled to the plurality of USB connection ports in a one-to-one manner. The plurality of power converters are coupled to the power supply circuit to receive source power. The power converters supply power to the USB connection ports. The common control circuit is coupled to the multiple USB ports to learn the power requirements of the multiple USB ports. The common control circuit is configured to correspondingly control the plurality of power converters to supply power to the plurality of USB ports according to the power requirements of the plurality of USB ports. The common control circuit calculates the total power of the multiple USB ports. The common control circuit correspondingly controls the power supply circuit to dynamically adjust the voltage of the source electrical energy according to the relationship between the total power and the threshold power.

An embodiment of the present invention provides an operating method of a multi-port power supply device. The multi-port power supply device includes a plurality of USB ports. The operation method includes: the power supply circuit provides source power to multiple power converters; the common control circuit learns the power requirements of the multiple USB ports; the common control circuit calculates the total power of these USB ports; The circuit correspondingly controls the power supply circuit to dynamically adjust the voltage of the source power according to the relationship between the total power and the threshold power; the common control circuit correspondingly controls the multiple power converters according to the power requirements of the multiple USB ports; and According to the control of the common control circuit, power is supplied from the plurality of power converters to the plurality of USB ports.

Based on the above, in some embodiments of the present invention, the multi-port power supply device and operation method dynamically adjust the power difference between the first power of a USB port at the first time and the second power at the second time. Transfer to another USB port. In some embodiments of the present invention, the multi-port power supply device and the operation method will correspondingly control the power supply circuit according to the relationship between the total power and the threshold power to dynamically adjust the voltage of the source electrical energy. In this way, the present invention can dynamically improve the voltage conversion efficiency of the multi-port power supply device.

In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail in conjunction with the accompanying drawings.

The term "coupling (or connection)" used in the full description of the case (including the scope of the patent application) can refer to any direct or indirect connection means. For example, if the text describes that the first device is coupled (or connected) to the second device, it should be interpreted as that the first device can be directly connected to the second device, or the first device can be connected through other devices or some This kind of connection means is indirectly connected to the second device. The terms "first" and "second" mentioned in the full text of the description of this case (including the scope of the patent application) are used to name the element (element), or to distinguish different embodiments or ranges, and are not used to limit the number of elements The upper or lower limit is not used to limit the order of components. In addition, wherever possible, elements/components/steps with the same reference numbers in the drawings and embodiments represent the same or similar parts. Elements/components/steps using the same reference numerals or using the same terms in different embodiments may refer to related descriptions.

Please refer to FIG. 1, which is a circuit block diagram of a multi-port power supply device according to an embodiment of the present invention. As shown in FIG. 1, the multi-port power supply device 100 includes a power supply circuit 110, USB connection ports 120_1 to 120_4, power converters 130_1 to 130_4, and a common control circuit 140. The number of power converters shown in Figure 1 is 4 (ie, power converters 120_1~120_4), and the number of USB ports is also 4 (ie, USB ports 120_1~120_4). In other embodiments, the number of power converters and the number of USB ports can be adjusted/set according to design requirements.

According to design requirements, in some embodiments, the power supply circuit 110 may include a voltage regulator (Voltage Regulator) or other power supply circuits that can adjust voltage, current, and/or power. According to the control of the common control circuit 140, the power supply circuit 110 can convert external AC power (or DC power) into DC power (for example, the source power Ps shown in FIG. 1). The source power Ps provided by the power supply circuit 110 can be supplied to the power converters 130_1 to 130_4.

In this embodiment, the multi-port power supply device 100 can supply power to different external devices (not shown) through different USB ports 120_1~120_4, and can learn from different USB ports 120_1~120_4. Configuration information CC1~CC4 of the external device. According to the configuration information CC1 to CC4, the multi-port power supply device 100 can learn the power requirements of these external devices (not shown). For example, any one of the USB ports 120_1 to 120_4 may be a USB Type-C (USB Type-C, also known as USB-C) port or a USB Type-A (USB Type-A) port.

The power converters 130_1~130_4 are respectively coupled to the USB ports 120_1~120_4 in a one-to-one manner. That is, the output end of the power converter 130_1 is coupled to the power pin (power bus pin, generally denoted as Vbus) of the USB port 120_1, and the output end of the power converter 130_2 is coupled to the power of the USB port 120_2 The output terminal of the power converter 130_3 is coupled to the power pin of the USB port 120_3, and the output terminal of the power converter 130_4 is coupled to the power pin of the USB port 120_4. The input terminals of the power converters 130_1 to 130_4 are respectively coupled to the output terminals of the power supply circuit 110 to receive the source power Ps. According to the control of the common control circuit 140, the power converter 130_1 can convert the source power Ps into the output power P1, and output the output power P1 to the corresponding power pin of the USB port 120_1. According to the control of the common control circuit 140, the power converter 130_2 can convert the source power Ps into the output power P2, and output the output power P2 to the corresponding power pin of the USB port 120_2. According to the control of the common control circuit 140, the power converter 130_3 can convert the source power Ps into the output power P3, and output the output power P3 to the corresponding power pin of the USB port 120_3. According to the control of the common control circuit 140, the power converter 130_4 can convert the source power Ps into the output power P4, and output the output power P4 to the corresponding power pin of the USB port 120_4.

The common control circuit 140 of the multi-port power supply device 100 is coupled to the USB ports 120_1~120_4, so as to know the power requirements of the USB ports 120_1~120_4. For example, in some embodiments, the common control circuit 140 may be coupled to the configuration channel (CC) pins of the USB ports 120_1 to 120_4 to obtain the configuration information CC1 to CC4. Taking the USB port 120_1 as an example, the common control circuit 140 obtains the configuration information CC1 of the external device (not shown) through the CC pin of the USB port 120_1. The common control circuit 140 can know from the configuration information CC1 that the voltage demand, current demand, and/or power demand of the USB port 120_1 (that is, the voltage demand, current demand, and/or power demand of the external device connected to the USB port 120_1) . Similarly, it can be deduced that the common control circuit 140 can learn the voltage requirements, current requirements and/or power requirements of the USB ports 120_2 to 120_4 through the configuration information CC2 to CC4 of the USB ports 120_2 to 120_4.

The common control circuit 140 is coupled to the control terminals of the power converters 130_1 to 130_4. The common control circuit 140 can support multiple USB protocols according to design requirements to jointly meet the transmission requirements of the USB ports 120_1 to 120_4 of different specifications. For example, when any one of the USB ports 120_1~120_4 is a USB Type-C port, the common control circuit 140 may be a USB Type-C port controller (Type-C) supporting the Power Delivery (PD) protocol. -C Port Controller, TCPC) or USB Type-C Port Manager (Type-C Port Manager, TCPM). For another example, if the USB ports 120_1 to 120_4 are USB Type-A ports, the power converter 130_1 may be a USB Type-A port manager supporting QC (Quick Charge) protocol. For another example, when any one of the USB ports 120_1 to 120_4 is connected to an external device with a programmable power supply (PPS) function, the common control circuit 140 can support the PPS protocol. The PPS protocol/function is a conventional protocol/function, so it will not be repeated.

The common control circuit 140 controls the power converter 130_1 according to the voltage requirement of the USB port 120_1, so that the power converter 130_1 converts/regulates the source power Ps into an output power P1 that meets the voltage requirement. In addition, the power converter 130_1 outputs the adjusted output power P1 to the power pin of the USB port 120_1. In the same way, the common control circuit 140 will control the power converters 130_2~130_4 according to the voltage requirements of the USB ports 120_2~120_4, so that the power converters 130_2~130_4 will output the adjusted output power P2~P4 to the USB connection. Port 120_2~120_4.

After learning the power requirements of the USB ports 120_1~120_4, the common control circuit 140 also controls the power supply circuit 110 correspondingly according to the power requirements of the USB ports 120_1~120_4, so as to dynamically adjust the voltage of the source power Ps (ie, the source voltage ), current and/or power. For example, by adjusting the voltage of the source power Ps, the common control circuit 140 can reduce the voltage difference between the source power Ps and the output power P1~P4 as much as possible. In this way, the multi-port power supply device 100 can dynamically adjust the source power Ps according to the power requirements of the USB ports 120_1~120_4, thereby improving the voltage conversion efficiency of the power converters 130_1~130_4 of the multi-port power supply device 100.

According to different design requirements, the implementation of the blocks of the common control circuit 140 may be hardware, firmware, software (program), or a combination of more of the three.

In terms of hardware, the blocks of the aforementioned common control circuit 140 can be implemented in a logic circuit on an integrated circuit. The above-mentioned related functions of the common control circuit 140 can be implemented as hardware by using hardware description languages (for example, Verilog HDL or VHDL) or other suitable programming languages. For example, the related functions of the aforementioned common control circuit 140 may be implemented in one or more controllers, microcontrollers, microprocessors, application-specific integrated circuits (ASICs), and digital signal processors. (Digital signal processor, DSP), Field Programmable Gate Array (FPGA), and/or various logic blocks, modules and circuits in other processing units.

In terms of software form and/or firmware form, the related functions of the aforementioned common control circuit 140 can be implemented as programming codes. For example, general programming languages (such as C, C++ or assembly language) or other suitable programming languages are used to implement the aforementioned common control circuit 140. The programming code may be recorded/stored in a recording medium, which includes, for example, a read-only memory (Read Only Memory, ROM), a storage device, and/or a random access memory (Random Access Memory, RAM). . A computer, a central processing unit (CPU), a controller, a microcontroller, or a microprocessor can read and execute the programming code from the recording medium, thereby achieving related functions. As the recording medium, a "non-transitory computer readable medium" can be used, for example, tape, disk, card, semiconductor memory, and Programming logic circuits, etc. Furthermore, the program can also be provided to the computer (or CPU) via any transmission medium (communication network, broadcast wave, etc.). The communication network is, for example, the Internet, wired communication, wireless communication, or other communication media.

Please refer to FIG. 1 and FIG. 2 at the same time. FIG. 2 is a schematic flowchart of the operation method according to the first embodiment of the present invention. In the embodiment of FIG. 1 and FIG. 2, the power supply circuit 110 provides source power Ps to the power converters 130_1 to 130_4 in step S210. In step S220, the common control circuit 140 learns the power requirements of the USB ports 120_1 to 120_4. The common control circuit 140 learns the power requirement of the USB port 120_1 through the configuration information CC1 of the USB port 120_1. Similarly, it can be deduced that the common control circuit 140 learns the power requirements of the USB ports 120_2 to 120_4 through the configuration information CC2 to CC4 of the USB ports 120_2 to 120_4.

In step S230, the common control circuit 140 correspondingly controls the power converters 130_1 to 130_4 according to the power requirements of the USB ports 120_1 to 120_4. Next, in step S240, the common control circuit 140 controls the power converter 130_1 to convert the source power Ps into the output power P1, so that the power converter 130_1 outputs the output power P1 to the USB port 120_1, thereby providing the output power P1 to An external device (not shown) connected to the USB port 120_1. In the same way, the power converters 130_2~130_4 convert the source power Ps into output power P2~P4, and output the output power P2~P4 to the USB ports 120_2~120_4.

3 to 5 are schematic diagrams illustrating the flow of step 230 shown in FIG. 2 according to an embodiment of the present invention. Please refer to Figure 1, Figure 3, Figure 4 and Figure 5 at the same time. In step S301, the common control circuit 140 can know the maximum required voltage value and the minimum required voltage value among the voltage requirements of the USB ports 120_1~120_4, and calculate the total power according to the power requirements of the USB ports 120_1~120_4 . The total power may be the sum of these power requirements (maximum power) of the USB ports 120_1 to 120_4. The maximum required voltage value may be the largest of these voltage requirements of the USB ports 120_1~120_4. The minimum required voltage value may be the smallest of the voltage requirements of the USB ports 120_1 to 120_4. In the following multiple steps, the common control circuit 140 can calculate the voltage value of the source power Ps according to the maximum required voltage value, the minimum required voltage value and the total power.

In this embodiment, the common control circuit 140 may determine in step S302 whether the USB ports 120_1 to 120_4 are connected to an external device with a programmable power supply (PPS) function. If the common control circuit 140 determines in step S302 that none of the USB ports 120_1 to 120_4 are connected to an external device with a programmable power supply function, then step node A is entered. Conversely, if the common control circuit 140 determines in step S302 that any one of the USB ports 120_1 to 120_4 is connected to an external device with a programmable power supply function, it proceeds to step node B.

In this embodiment, after it is determined in step S302 shown in FIG. 3 that none of the USB ports 120_1 to 120_4 are connected to an external device with a programmable power supply function, the common control circuit 140 may execute step S402 in FIG. 4. In step S402, the common control circuit 140 may determine whether the total power is less than or equal to the rated power value of the power supply circuit 110, and determine the difference between the maximum required voltage value and the minimum required voltage value (ie Whether the demand voltage difference) is less than or equal to the threshold. The threshold can be determined according to design requirements. The rated power value of the power supply circuit 110 may be the maximum value of the output power of the power supply circuit 110 (the maximum power of the source electric energy Ps). When the common control circuit 140 determines that the total power of the USB ports 120_1~120_4 is less than or equal to the rated power value of the power supply circuit 110, and the required voltage difference is less than or equal to the threshold value (that is, the determination of step S402 The result is "Yes"), and the common control circuit 140 proceeds to step S403. In step S403, the common control circuit 140 selects the maximum demand voltage value as the candidate voltage value. When the common control circuit 140 determines that the total power of the USB ports 120_1~120_4 is greater than the rated power value of the power supply circuit 110, and/or the required voltage difference is greater than the threshold value (that is, the determination of step S402 The result is "No"), and the common control circuit 140 proceeds to step S404. In step S404, the common control circuit 140 selects the average value of the maximum demand voltage value and the minimum demand voltage value as the candidate voltage value.

In the subsequent steps S405 to S410, the common control circuit 140 calculates the voltage value of the source power Ps according to the candidate voltage value. When the common control circuit 140 determines that the product of the candidate voltage value and the rated current value of the power supply circuit 110 is greater than or equal to the total power of the USB ports 120_1~120_4, the common control circuit 140 can be based on the candidate voltage Value to adjust the voltage of the source power Ps. Wherein, the rated current value of the power supply circuit 110 may be the maximum value of the output current of the power supply circuit 110 (the maximum current of the source power Ps). Conversely, when the common control circuit 140 determines that the product of the candidate voltage value and the rated current value of the power supply circuit 110 is less than the total power of the USB ports 120_1~120_4, the common control circuit 140 can be based on the total power The quotient of the power and the rated current value adjusts the voltage of the source power Ps.

In detail, in this embodiment, after the maximum demand voltage value is selected as the candidate voltage value in step S403, the common control circuit 140 may proceed to step S405. In step S405, the common control circuit 140 further determines whether the product of the candidate voltage value (the maximum required voltage value) and the rated current value of the power supply circuit 110 is greater than or equal to the USB ports 120_1~120_4. Total power. When the product of the maximum required voltage value and the rated current value is greater than or equal to the total power (that is, the judgment result of step S405 is “Yes”), the common control circuit 140 may proceed to step S406. In step S406, the common control circuit 140 adjusts the voltage of the source power Ps according to the candidate voltage value (the maximum required voltage value). For example, the common control circuit 140 adjusts the voltage value of the source power Ps to the maximum required voltage value.

Conversely, when the product of the maximum required voltage value and the rated current value is less than the total power (that is, the judgment result of step S405 is “No”), the common control circuit 140 may proceed to step S407. In step S407, the common control circuit 140 adjusts the voltage of the source power Ps according to the quotient of the total power and the rated current value. For example, assuming that the total power of the USB ports 120_1~120_4 is H, and the rated current value of the power supply circuit 110 is Ir, the common control circuit 140 will adjust the voltage value of the source power Ps to H/ Ir.

On the other hand, after the average value of the maximum demand voltage value and the minimum demand voltage value is selected as the candidate voltage value in step S404, the common control circuit 140 may proceed to step S408. In step S408, the common control circuit 140 determines whether the product of the candidate voltage value (the average value) and the rated current value of the power supply circuit 110 is greater than or equal to the total power. When the product is greater than or equal to the total power (that is, the judgment result of step S408 is "Yes"), the common control circuit 140 may proceed to step S409. In step S409, the common control circuit 140 adjusts the voltage of the source power Ps according to the candidate voltage value (the average value of the maximum demand voltage value and the minimum demand voltage value). For example, if the maximum required voltage value is A and the minimum required voltage value is B, the average value (candidate voltage value) is (A+B)/2, and the common control circuit 140 will The voltage value of the source power Ps is adjusted to (A+B)/2.

Conversely, when the product of the average value (candidate voltage value) and the rated current value of the power supply circuit 110 is less than the total power (that is, the judgment result of step S408 is "No"), the common control circuit 140 may Go to step S410. In step S410, the common control circuit 140 adjusts the voltage of the source power Ps according to the quotient of the total power and the rated current value. For example, assuming that the total power of the USB ports 120_1~120_4 is H, and the rated current value of the power supply circuit 110 is Ir, the common control circuit 140 will adjust the voltage value of the source power Ps to H/ Ir.

Returning to step S302 shown in FIG. 3, when the common control circuit 140 determines in step S302 that any one of the USB ports 120_1~120_4 is connected to an external device with a programmable power supply function, the common control circuit 140 can execute the diagram Step S502 in 5. In step S502, the common control circuit 140 obtains the threshold power. The threshold power can be determined according to design requirements. For example, in some embodiments, the common control circuit 140 may calculate the product of the minimum rated voltage (for example, 5 volts) and the maximum rated current (for example, 5 amperes) of the power supply circuit 110 as the threshold power (for example, Is 25 watts). In step S503, the common control circuit 140 may determine whether the total power H obtained in step S301 is less than the threshold power. When the common control circuit 140 determines in step S503 that the total power H is less than the threshold power, the common control circuit 140 proceeds to step S504 to set the voltage value of the source power Ps of the power supply circuit 110 to the value of the USB ports 120_1~120_4 Minimum rated voltage (for example, 5 volts).

When the common control circuit 140 determines in step S503 that the total power H is greater than or equal to the threshold power, and the total power H is less than or equal to the rated power that the power supply circuit 110 can provide, the common control circuit 140 proceeds to step S505 to calculate the total power The quotient of H and the maximum rated current of the power supply circuit 110, and the voltage value of the source power Ps of the power supply circuit 110 is set to the above quotient. For example, assuming that the maximum rated current of the power supply circuit 110 is 5 amperes, the common control circuit 140 may set the voltage value of the source power Ps of the power supply circuit 110 to H/5.

Table 1 is a power supply comparison table of a multi-port power supply device according to an embodiment of the present invention.

Table 1: Configuration CC1 CC2 CC3 CC4 Total power Ps voltage/current 1 5V/3A 5V/3A 5V/3A 5V/2.4A 57W 11.4V/5A 2 5V/3A 15W 5V/3A 3 20V/3A 60W 20V/3A 4 5V/3A 20V/2.25A 60W 12.5V/4.8A 5 15V/1A 15V/1A 15V/1A 5V/2.4A 57W 11.4V/5A 6 9V/1A 9V/1A 9V/1A 5V/2.4A 39W 9V/4.4A 7 5V/3A 9V/1A 24W 9V/2.6A 8 5V/3A 12V/3A 51W 10.2V/5A 9-1 3.3~8.3V/3A ＜25W 5V/5A 9-2 8.3~11V/3A ≧25W 5~6.6V/5A 10-1 3.3~4.3V/3A 5V/2.4A ＜25W 5V/5A 10-2 4.4~11V/3A 5V/2.4A ≧25W 5~9V/5A 11-1 3.3~4.3V/1.5A 3.3~4.3V/1.5A 5V/2.4A ＜25W 5V/5A 11-2 4.4~11V/1.5A 4.4~11V/1.5A 5V/2.4A ≧25W 5~9V/5A

Please refer to FIG. 1, FIG. 3, FIG. 4, FIG. 5, and Table 1. In this embodiment, the power supply comparison table of Table 1 lists examples of multiple configurations. In the first configuration to the eighth configuration, it is assumed that none of the USB ports 120_1~120_4 is connected to an external device with a programmable power supply function. In the 9-1 configuration, 9-2 configuration, 10-1 configuration, 10-2 configuration, 11-1 configuration to 11-2 configuration, it is assumed that the USB ports 120_1~120_4 Any one is connected to an external device with programmable power supply function. In the embodiment shown in Table 1, the rated power value of the power supply circuit 110 is assumed to be 60 watts, the threshold value in step S402 is assumed to be 5 volts, the rated current value of the power supply circuit 110 is assumed to be 5 amperes, and the step The threshold power in S502 is 25 watts (the preset minimum rated voltage value is 5 volts).

First, take the first configuration as an example. In the first configuration, the common control circuit 140 can learn from the configuration information CC1~CC4 of the USB ports 120_1~120_4 that the voltage requirements of the USB ports 120_1~120_4 are all 5 volts in step S301. , And the current requirements of the USB ports 120_1~120_4 are all 3 amperes. Therefore, the total power H of the USB ports 120_1 to 120_4 is 5*3 + 5*3 + 5*3 + 5*2.4 = 57 watts. In step S302, the common control circuit 140 can learn from the configuration information CC1~CC4 of the USB ports 120_1~120_4 that none of the USB ports 120_1~120_4 is connected to an external device with programmable power supply function, so the common control circuit 140 performs steps S402, S403, S405, and S407 in FIG. 4. In the second configuration, the common control circuit 140 can learn from the configuration information CC1 that the required voltage of the external device connected to the USB port 120_1 is 5V and the demand current is 3A, and can also learn the USB connection from the configuration information CC2~CC4 Ports 120_2~120_4 are not connected to external devices. Therefore, the total power H of the USB ports 120_1 to 120_4 is 5*3 + 0 + 0 + 0 = 15 watts. Therefore, the common control circuit 140 performs steps S402, S403, S405, and S406 in FIG. 4. The same principle can be inferred. In the third configuration, the sixth configuration, and the seventh configuration, the common control circuit 140 performs steps S402, S403, S405, and S406 in FIG. 4. In the fourth configuration, the common control circuit 140 performs steps S402, S404, S408, and S409 in FIG. 4. In the fifth configuration and the eighth configuration, the common control circuit 140 performs steps S402, S404, S408, and S410 in FIG. 4.

In the 9-1 configuration, the common control circuit 140 can learn that the USB port 120_1 is connected to an external device with programmable power supply function through the configuration information CC1~CC4 of the USB ports 120_1~120_4 in step S302, and then step S502 . The common control circuit 140 calculates in step S502 that the total power H is increased from 9.9 watts to 24.9 watts. In the above process, the common control circuit 140 determines in step S503 that the total power H is less than the threshold power (for example, 25 watts), and therefore proceeds to step S504. The common control circuit 140 sets the voltage value of the source power Ps of the power supply circuit 110 to the minimum rated voltage, that is, 5 volts. In addition, the common control circuit 140 sets the current value of the source power Ps of the power supply circuit 110 as the quotient of the threshold power and the minimum rated voltage, that is, 5 amperes. In the 9-2 configuration, the common control circuit 140 can learn that the USB port 120_1 is connected to an external device with programmable power supply function through the configuration information CC1~CC4 of the USB ports 120_1~120_4 in step S302, and then step S502 . The common control circuit 140 calculates in step S502 that the total power H is increased from 24.9 watts to 33 watts. In the above process, the common control circuit 140 determines in step S503 that the total power H is greater than the threshold power, and the total power H is less than the rated power (60W), so it proceeds to step S505. The common control circuit 140 calculates the quotient of the total power H and the maximum rated current (for example, 5 amperes) of the power supply circuit. And the voltage value of the source electric energy Ps of the electric power supply circuit 110 is set to the aforementioned quotient, that is, 5 volts to 6.6 volts. In addition, the common control circuit 140 sets the current value of the source power Ps of the power supply circuit 110 to 5 amperes (ie, the maximum rated current). It is worth mentioning here that the multi-port power supply device 100 can dynamically adjust the source power Ps according to the 9-1 configuration being replaced with the 9-2 configuration, so as to dynamically maintain the high voltage of the multi-port power supply device. Conversion efficiency.

Configuration 10-1 adds external devices that do not have programmable power supply functions. However, in step S302, the common control circuit 140 can learn that the USB port 120_1 is connected to an external device with a programmable power supply function through the configuration information CC1 to CC4 of the USB ports 120_1 to 120_4, and then proceeds to step S502. The common control circuit 140 calculates in step S502 that the total power H increases from 21.9 watts to 24.9 watts. In the above process, the common control circuit 140 determines in step S503 that the total power H is less than the threshold power (for example, 25 watts), and therefore proceeds to step S504. The common control circuit 140 sets the voltage value of the source power Ps of the power supply circuit 110 to the minimum rated voltage, that is, 5 volts. In addition, the common control circuit 140 sets the current value of the source power Ps of the power supply circuit 110 as the quotient of the threshold power and the minimum rated voltage, that is, 5 amperes. In the 10-2 configuration, the common control circuit 140 calculates in step S502 that the total power H is increased from 25.2 watts to 45 watts. In the above process, the common control circuit 140 determines in step S503 that the total power H is greater than the threshold power, and the total power H is less than the rated power (60W), so it proceeds to step S505. The common control circuit 140 calculates the quotient of the total power H and the maximum rated current (for example, 5 amperes) of the power supply circuit. And the voltage value of the source electric energy Ps of the power supply circuit 110 is set to the aforementioned quotient, that is, 5 volts to 9 volts. In addition, the common control circuit 140 sets the current value of the source power Ps of the power supply circuit 110 to 5 amperes (ie, the maximum rated current).

Configuration 11-1 adds external devices that do not have programmable power supply functions. However, the common control circuit 140 can learn that the USB ports 120_1 and 120_2 are connected to external devices with programmable power supply functions through the configuration information CC1 to CC4 of the USB ports 120_1 to 120_4 in step S302, and then step S502. The common control circuit 140 calculates in step S502 that the total power H increases from 21.9 watts to 24.9 watts. In the above process, the common control circuit 140 determines in step S503 that the total power H is less than the threshold power (for example, 25 watts), and therefore proceeds to step S504. The common control circuit 140 sets the voltage value of the source power Ps of the power supply circuit 110 to the minimum rated voltage, that is, 5 volts. In addition, the common control circuit 140 sets the current value of the source power Ps of the power supply circuit 110 as the quotient of the threshold power and the minimum rated voltage, that is, 5 amperes. In the 11-2 configuration, the common control circuit 140 calculates in step S502 that the total power H is increased from 25.2 watts to 45 watts. In the above process, the common control circuit 140 determines in step S503 that the total power H is greater than the threshold power, and the total power H is less than the rated power (60W), so it proceeds to step S505. The common control circuit 140 calculates the quotient of the total power H and the maximum rated current (for example, 5 amperes) of the power supply circuit. And the voltage value of the source electric energy Ps of the power supply circuit 110 is set to the aforementioned quotient, that is, 5 volts to 9 volts. In addition, the common control circuit 140 sets the current value of the source power Ps of the power supply circuit 110 to 5 amperes (ie, the maximum rated current).

Please go back to the embodiment of FIG. 1. In another embodiment, the common control circuit 140 of the multi-port power supply device 100 can learn the power changes of the USB ports 120_1~120_4 according to the power changes of the USB ports 120_1~120_4 Correspondingly control the power converters 130_1~130_4. In addition, the common control circuit 140 can also dynamically transfer the power difference between the power of one of the USB ports 120_1~120_4 at the first time and the power at the second time later than the first time to other USB ports. Connection port.

In this embodiment, the common control circuit 140 can learn the power changes of the USB ports 120_1 to 120_4. For example, a sensing resistor (not shown) can be set between the USB port 120_1 and the power converter 130_1, and the common control circuit 140 can sense the connection through the USB through the sensing resistor (not shown) The current of port 120_1 changes. The common control circuit 140 can infer the power change of the USB port 120_1 according to the current change of the USB port 120_1. By analogy, the common control circuit 140 can learn the power changes of the USB ports 120_2 to 120_4.

For specific description, please refer to Figure 1 and Figure 6 at the same time. FIG. 6 is a schematic flowchart of the operation method according to the second embodiment of the present invention. In this embodiment, the common control circuit 140 learns the power changes of the USB ports 120_1 to 120_4 in step S610. In step S610, the common control circuit 140 can learn the power changes of the ports 120_1~120_4 through the configuration information CC1~CC4 of the ports 120_1~120_4. In step S620, the common control circuit 140 correspondingly controls the power supply circuit 110 to dynamically adjust the source power Ps according to the power requirements of the ports 120_1 to 120_4. In step S630, the common control circuit 140 controls the power converter 130_1 to convert the source power Ps into the output power P1, so that the power converter 130_1 outputs the output power P1 to the connection port 120_1, thereby providing the output power P1 to the connection External device of port 120_1 (not shown). In the same way, the power converters 130_2~130_4 convert the source power Ps into output power P2~P4, and output the output power P2~P4 to the connection ports 120_2~120_4. In step S640, the common control circuit 140 compares the power of one of the USB ports 120_1~120_4 at the first time and the power at the second time later than the first time according to the power changes of the USB ports 120_1~120_4 The power difference between them is dynamically transferred to one of the other USB ports. For example, during the continuous period when the USB port 120_3 is electrically connected to the external device, the common control circuit 140 controls the power converter 130_3 for the first time, so that the power converter 130_3 provides the output power P3 to the USB port 120_3. When the power at the USB port 120_1 drops, that is, the power of the output power P1 at the second time is less than the power of the output power P1 at the first time. The common control circuit 140 controls the power converters 130_1 and 130_3 at the second time, and the USB port 120_1 transfers the power difference caused by the power drop to the USB port 120_3. Therefore, the power of the output electrical energy P3 will be increased, that is, the power of the output electrical energy P3 at the second time will be greater than the power of the output electrical energy P3 at the first time. In some embodiments, step S640 may follow step S610.

Please refer to Figure 1 and Figure 7 to Figure 10 at the same time. 7 to 10 are schematic diagrams of the operation method according to the third embodiment of the present invention. In this embodiment, the common control circuit 140 obtains the rated power TP of the power supply circuit 110 in step S701. The common control circuit 140 determines whether the USB ports 120_1 to 120_4 are connected to external devices in step S702 in FIG. 7. In this embodiment, the USB connection ports 120_1 to 120_3 may be Type-C connection ports, for example. The USB port 120_4 may be a Type-A port, for example. If the common control circuit 140 determines that only at least two of the USB ports 120_1 to 120_3 are respectively connected to the external device, step node C is entered. Next, in step S802 of FIG. 8, the common control circuit 140 obtains the reserved value T1 corresponding to the Type-C port when the Type-C port is connected to the external device, and uses the power supply circuit 110 The surplus power REM is calculated from the rated power and the total power. In this embodiment, the reserved value T1 is the product of the minimum rated voltage of the Type-C port and the maximum rated current of the Type-C port. In this embodiment, the minimum rated voltage of the Type-C port is 5 volts, and the maximum rated current of the Type-C port is 3 amperes, so the reserved value T1 is equal to 15. The reserved value T1 of the Type-C port is a real number. The remaining power REM is the difference obtained by subtracting the power of the USB port connected to the external device from the rated power TP of the power supply circuit 110.

In step S803, the common control circuit 140 determines whether the powers of the Type-C ports connected to the external device are the same. If they are the same, this means that the output power of the Type-C port does not need to be transferred, so step S804 is entered. In step S804, the common control circuit 140 will wait. For example, the common control circuit 140 will wait (but not limited to) 10 minutes before returning to step S803.

In some embodiments, the common control circuit 140 further determines whether the power of the Type-C port is greater than the lowest rated power of the Type-C port in step S803. If the common control circuit 140 determines that the power of the Type-C port is less than or equal to the lowest rated power of the Type-C port, no subsequent operation is performed. If the common control circuit 140 determines that the power of the Type-C port is greater than the lowest rated power of the Type-C port, subsequent operations can be performed.

In step S803, if the common control circuit 140 determines that the power of the Type-C port connected to the external device is different, it proceeds to step S805. In step S805, the common control circuit 140 determines whether the power of the Type-C port with the maximum power (ie, the first USB port) is greater than the reserved value T1 corresponding to the Type-C port. If the common control circuit 140 determines that the power of the first USB port is greater than the reserved value T1 corresponding to the Type-C port, step S806 is entered. In step S806, the common control circuit 140 will wait. For example, the common control circuit 140 will wait (but not limited to) 10 minutes before returning to step S805. If the common control circuit 140 determines that the power of the first USB port is less than or equal to the reserved value T1 corresponding to the Type-C port, it means that the power of the first USB port has been reduced. Therefore, step S807 is entered to start transferring the power difference of the first USB port to other USB ports (ie, the second USB port). Once the transfer is completed, step S808 is entered. In step S808, the common control circuit 140 will wait. For example, the common control circuit 140 will wait (but not limited to) 10 minutes before returning to step S802.

In step S807, the voltage value of the USB port 120_1 is adjusted to 5 volts, and the current value is adjusted to 3 amperes.

In step S807, the common control circuit 140 can also use the power of the first USB port at the first time, the reserved value T1, the original power of the second USB port at the first time, and the residual power REM to calculate the new output power. The voltage value and current value of P3. The common control circuit 140 controls the power converters 130_1 to 130_4 to allocate new power to the second USB port after the second time. In detail, the common control circuit 140 obtains a first reference value according to formula (1).

N1 = (P1-T1 + P3 + REM) / IP…………………….. Formula (1)

Where N1 is the first reference value, P1 is the power of the first USB port at the first time, P3 is the original power of the second USB port at the first time, and IP is the maximum rated current value. The first reference value may be a positive integer or a positive real number.

The common control circuit 140 provides the corresponding voltage values in different intervals according to the first reference value to the Type-C ports that receive the power difference after the second time. For example, when the common control circuit 140 determines that the first reference value is less than or equal to 5, the common control circuit 140 controls the power converters 130_1 to 130_4 to configure a voltage value of 5 volts to the second USB port. When the common control circuit 140 determines that the first reference value is greater than 5 and less than or equal to 9, the common control circuit 140 controls the power converters 130_1 to 130_4 to configure a voltage value of 5V or 9V to the second USB port. When the common control circuit 140 determines that the first reference value is greater than 9 and less than or equal to 12, the common control circuit 140 will control the power converters 130_1~130_4 to configure the voltage value of 5V, 9V or 12V for the second USB connection port. When the common control circuit 140 determines that the first reference value is greater than 12 and less than or equal to 15, the common control circuit 140 will control the power converters 130_1~130_4 to configure a voltage value of 5 volts, 9 volts, 12 volts, or 15 volts. The second USB port. When the common control circuit 140 determines that the first reference value is greater than 15, the common control circuit 140 will control the power converters 130_1~130_4 to configure a voltage value of 5 volts, 9 volts, 12 volts, 15 volts or 20 volts for the second USB port.

Table 2 is a power supply comparison table of a multi-port power supply device according to an embodiment of the invention.

Table 2: Configuration CC1 CC2 CC3 Residual power 12-1 5V/3A 5V/3A 5V/3A 15W 12-2 5V/3A 5V/3A 5V/3A 15W 13-1 9V/3A 9V/2.67A 9V/1A 0W 13-2 5V/3A 9V/2.67A 9V/2.3A 0W 14-1 5V/3A 9V/2.67A 9V/2.3A 0W 14-2 5V/3A 5V/3A 12V/2.5A 0W 15-1 15V/3A 9V/1.5A 1.5W 15-2 5V/3A 15V/3A 0W 16-1 20V/2.25A 9V/1.5A 1.5W 16-2 5V/3A 15V/3A 0W

To further illustrate with an example, please refer to FIG. 1, FIG. 8 and Table 2. In this example, regarding the 12-1 configuration, the common control circuit 140 can obtain the configuration information CC1~ from the 12-1 configuration in step S803. CC3 determines that the power of the Type-C port connected to the external device is the same. Therefore, after entering the 12-2 configuration, there will be no transfer of power differences.

Regarding the 13-1 and 13-2 configurations, the common control circuit 140 can determine from the configuration information CC1~CC3 of the 13-1 configuration that the power of the Type-C port connected to the external device is different in step S803 . The configuration information CC1 indicates that the USB port 120_1 is a Type-C port with the maximum power (ie, 27 watts). Therefore, the common control circuit 140 uses the USB port 120_1 as the first USB port. The configuration information CC3 indicates that the USB port 120_3 is a Type-C port with minimum power (ie, 9 watts). The common control circuit 140 uses the USB port 120_3 as the second USB port. The common control circuit 140 will start to determine in step S805 whether the power of the USB port 120_1 has decreased from greater than the reserved value T1 corresponding to the Type-C port to less than or equal to the reserved value T1. If the power of the USB port 120_1 in the 13-1 configuration transition to the 13-2 configuration (ie, the second time) is reduced to less than or equal to the reserved value T1 (ie, the configuration information CC1 in the 13-2 configuration) , Then enter step S807 to transfer the power difference to the second USB port, that is, the USB port 120_3. In step S807, the common control circuit 140 determines that the power of the USB port 120_1 is reduced from 27 watts to 15 watts. In other words, the charging (or power supply) of the external device by the USB port 120_1 has ended or is about to end. Therefore, a change from 27 watts to 15 watts, which is 12 watts, is used as the power difference. Next, the common control circuit 140 calculates the new power by using the power difference (ie, 12 watts) and the original power of the USB port 120_3 at the second time (ie, 9 watts), that is, 9 + 12 = 21 watts . Therefore, the power of the USB port 120_3 increases from 9 watts to 21 watts. The voltage value of the USB port 120_1 is adjusted to 5 volts, and the current value is adjusted to 3 amperes. In the 13-1 and 13-2 configurations, the first reference value can be obtained as 7 according to formula (1). Therefore, the voltage value of the USB port 120_3 can be 9 volts. And the current value of the USB port 120_3 is the quotient of the new power and voltage, which is 2.3 amperes.

Regarding the 14-1 and 14-2 configurations, the common control circuit 140 can determine from the configuration information CC1~CC3 of the 14-1 configuration that the power of the Type-C port connected to the external device is different in step S803 . The configuration information CC2 indicates that the USB port 120_2 is a Type-C port with maximum power (ie, 24 watts). The common control circuit 140 uses the USB port 120_2 as the first USB port, and uses the USB port 120_3 as the second USB port.

The common control circuit 140 determines in step S805 that the power of the USB port 120_2 in the 14-1 configuration transition to the 14-2 configuration (ie, the second time) is reduced to less than or equal to the reserved value T1, and then enters step S807 transfers to the second USB port, which is the USB port 120_3, based on the power difference. In step S807, the common control circuit 140 determines that the power of the USB port 120_2 is reduced from 24 watts to 15 watts. In other words, the charging (or powering) of the external device by the USB port 120_2 has ended or is about to end. Therefore, the change from 24 watts to 15 watts, which is 9 watts, is used as the power difference. Next, the common control circuit 140 calculates the new power by using the power difference (ie, 9 watts) and the original power of the USB port 120_3 at the second time (ie, 21 watts), that is, 21 + 9 = 30 watts . Therefore, the power of the USB port 120_3 increases from 21 watts to 30 watts. The voltage value of the USB port 120_2 is adjusted to 5 volts, and the current value is adjusted to 3 amperes. In the 14-1 and 14-2 configurations, the first reference value can be equal to 10 according to formula (1). Therefore, in the 14-2 configuration, the voltage value of the USB port 120_3 can be 12 volts. And the current value of the USB port 120_3 is the quotient of the new power and voltage, which is 2.5 amperes.

Regarding the 15-1 and 15-2 configurations, the common control circuit 140 can determine from the configuration information CC1~CC3 of the 15-1 configuration that the power of the Type-C port connected to the external device is different in step S803 . The configuration information CC1 indicates that the USB port 120_1 is a Type-C port with maximum power (ie, 45 watts). The common control circuit 140 uses the USB port 120_1 as the first USB port, and uses the USB port 120_2 as the second USB port.

The common control circuit 140 determines in step S805 that the power of the USB port 120_1 in the 15-1 configuration transition to the 15-2 configuration (ie, the second time) is reduced to less than or equal to the reserved value T1, and then the step is entered S807 transfers to the second USB port, which is the USB port 120_2, based on the power difference. In step S807, the common control circuit 140 determines that the power of the USB port 120_1 is reduced from 45 watts to 15 watts. In other words, the charging (or power supply) of the USB port 120_1 to the external device has ended or is about to end. Therefore, the change from 45 watts to 15 watts, which is 30 watts, is used as the power difference. Next, the common control circuit 140 calculates the new power by using the power difference (ie, 30 watts), the original power of the USB port 120_2 at the second time (ie, 13.5 watts), and the remaining power (ie, 1.5 watts). , Which is 30 + 13.5 + 1.5 = 45 watts. Therefore, the power of the USB port 120_2 increases from 13.5 watts to 45 watts. The voltage value of the USB port 120_1 is adjusted to 5 volts, and the current value is adjusted to 3 amperes. In the 15-1 and 15-2 configurations, the first reference value can be obtained as 15 according to formula (1). Therefore, in the 15-2 configuration, the voltage value of the USB port 120_2 may be 15 volts. And the current value of the USB port 120_2 is the quotient of the new power and voltage value, that is, 3 amperes.

Regarding the 16-1 and 16-2 configurations, sufficient teaching can be obtained from the descriptions of the 15-1 and 15-2 configurations, so I will not repeat them here.

Please return to step S702 of the third embodiment shown in FIG. 1 and FIG. 7 to FIG. 10. In step S702, if the common control circuit 140 determines that only at least one of the USB ports 120_1 to 120_3 and the USB port 120_4 are respectively connected to the external device, step S703 is entered. In step S703, the common control circuit 140 determines whether at least one of the Type-C ports (ie, the USB ports 120_1 to 120_3) is connected to the external device first. If the common control circuit 140 determines that at least one of the Type-C ports is connected to the external device first, step node D is entered.

Next, in step S902 in FIG. 9, the common control circuit 140 obtains the reserved value T1 corresponding to the Type-C port when the Type-C port is connected to the external device. The common control circuit 140 determines whether the Type-A port is connected to an external device through the Type-A port (ie, the USB port 120_4). It should be understood that in step S902, the common control circuit 140 may also perform the operations of steps S802 to S808. In step S903, the Type-A port is connected to the external device. The common control circuit 140 obtains the maximum reserved value T2 and the minimum reserved value T3 corresponding to the Type-A port when the Type-A port is connected to the external device, and obtains the residual power REM.

In this embodiment, the aforementioned maximum reserved value T2 is the product of the minimum rated voltage of the Type-A port and the maximum rated current of the Type-A port. The above minimum reserved value T3 is the product of the minimum rated voltage of the Type-A port and the minimum rated current of the Type-A port. In this embodiment, the minimum rated voltage of the Type-A port is 5 volts, the maximum rated current of the Type-A port is 2.4 amperes, and the minimum rated current of the Type-A port is 1 ampere. Therefore, the maximum reserved value T2 is equal to 12, and the minimum reserved value T3 is equal to 5. The residual power REM is the difference of the rated power TP minus the power of the USB ports (including Type-C and Type-A ports) connected to external devices.

In addition, in step S903, when the Type-A port is connected to an external device, the current of the Type-A port is limited, and the current limit flag value is set to 0. In this embodiment, the current of the Type-A port can be limited to less than or equal to the minimum rated current of the Type-A port, such as 0.5 ampere, but it is not limited to this. In this embodiment, the delay time length when the current limit flag value is set to 0 must be greater than a maintenance time length (for example, 3 seconds). The above-mentioned maintenance time length is the shortest time length between performing steps S904 to S907, that is, the shortest time required to perform power difference conversion.

Next, the common control circuit 140 determines in step S904 whether the total power of the Type-C port is less than or equal to the difference between the rated power TP and the reserved value T1. If the common control circuit 140 determines that the total power of the Type-C port is less than or equal to the difference between the rated power TP and the reserved value T1. This means that the Type-A port can receive enough output power P4, and the output power does not need to be transferred. Therefore, the common control circuit 140 will wait in step S905. For example, the common control circuit 140 will wait (but not limited to) 10 minutes before returning to step S904. Conversely, if the common control circuit 140 determines that the total power of the Type-C port is greater than the difference between the rated power TP and the reserved value T1, this means that the output power needs to be transferred. Therefore, the common control circuit 140 determines in step S906 whether the power of the Type-C port with the maximum power is greater than the reserved value T1, and the current limit flag value of the Type-A port=0. If the judgment result is "Yes", it means that the Type-A port is in a current-limited state, and the Type-C port with the highest power has enough power to transfer to the Type-A port. Therefore, the common control circuit 140 will release the current limit of the Type-A port in step S907, transfer the power difference of the Type-C port with the highest power to the Type-A port, and transfer the Type-A port The current limit flag value is changed to 1. Once the transfer is completed, it enters step S908 and waits. For example, the common control circuit 140 will wait (but not limited to) 10 minutes before returning to step S902. In an embodiment, the current limit flag value can also be changed from 1 to 0.

In step S907, for example, the voltage value of the USB port 120_4 is fixed to 5 volts, and the current value is adjusted from the limited 0.5 ampere to 2.4 ampere.

In step S907, the common control circuit 140 can also calculate the voltage value and current value of the new output power P3 using the power of the Type-C port with the maximum power at the second time, the maximum reserved value T2, and the remaining power REM. The common control circuit 140 controls the power converters 130_1 to 130_4 to allocate new power to the second USB port after the second time. In detail, the common control circuit 140 obtains a second reference value according to formula (2).

N2 = (P3 – T2 + REM) / IP…………………….. Formula (2)

Where N2 is the second reference value, and P3 is the power of the Type-C port with the maximum power at the second time. The second reference value may be a positive integer or a positive real number.

The common control circuit 140 provides the corresponding voltage value in different intervals according to the second reference value to the Type-C port having the maximum power before the second time. In one embodiment, the common control circuit 140 provides the corresponding voltage value to any other Type-C port in different intervals according to the second reference value. The implementation details of the second reference value providing corresponding voltage values in different intervals can be sufficiently taught in the foregoing implementation details of the first reference value, so it will not be repeated here.

Please go back to step S906. If the result of the judgment is "No", go to step S909. In step S909, the common control circuit 140 determines whether the power of the Type-A port is less than or equal to the minimum reserved value T3, and the current limit flag value of the Type-A port is equal to 1. If the result of the judgment is "Yes", it means that the current limit of the Type-A port has been lifted, and the power of the Type-A port has dropped to less than or equal to the minimum reserved value T3. In other words, the charging (or power supply) of the Type-A port to the external device has ended or is about to end. The common control circuit 140 transfers the power difference of the Type-A port to one of the Type-C ports in step S910, and changes the current limit flag value of the Type-A port to 0. Once the transfer is completed, step S908 is entered.

In step S910, for example, the voltage value of the USB port 120_4 is fixed to 5 volts, and the current value is adjusted from 2.4 amperes to 1 ampere.

In step S910, the common control circuit 140 can also use the power of the Type-C port with the maximum power at the second time, the maximum reserved value T2, and the residual power REM to calculate the voltage value and current value of the new output power P3. The common control circuit 140 controls the power converters 130_1 to 130_4 to allocate new power to the second USB port after the second time. In detail, the common control circuit 140 obtains a third reference value according to formula (3).

N3 = (P3 + T2 – P4+ REM) / IP…………………….. Formula (3)

Where N3 is the third reference value, and P4 is the power of the Type-A port at the second time. The third reference value may be a positive integer or a positive real number.

The common control circuit 140 provides the corresponding voltage value in different intervals according to the third reference value to the Type-C port having the maximum power before the second time. In one embodiment, the common control circuit 140 provides the corresponding voltage value to any other Type-C port in different intervals according to the third reference value. The implementation details of the third reference value providing corresponding voltage values in different intervals can be taught enough in the implementation details of the first reference value, so it will not be repeated here.

Please go back to step S909, if the result of the judgment is "No", go to step S911 and wait. For example, the common control circuit 140 will wait (but not limited to) 10 minutes before returning to step S909.

Table 3 is a power supply comparison table of a multi-port power supply device according to an embodiment of the invention.

table 3: Configuration CC1 (Type-C) CC2 (Type-C) CC3 (Type-C) CC4 (Type-A) Current limit flag value 17 5V/3A 5V/3A 5V/3A 5V/2.4A 0 18 Convert 9V/3A to 5V/3A 9V/2A 5V/3A 5V/0.5A to 5V/2.4A 1 19 Convert 12V/3A to 9V/2.6A 9V/1A 5V/3A 5V/0.5A to 5V/2.4A 1 20 Convert 15V/3A to 12V/2.7A 5V/3A 5V/0.5A to 5V/2.4A 1 twenty one Convert 20V/2.5A to 15V/2.6A 9V/1A 5V/0.5A to 5V/2.4A 1 twenty two Convert 20V/3A to 20V/2.4A 5V/0.5A to 5V/2.4A 1 twenty three 5V/3A Convert 9V/2A to 9V/2.7A 5V/3A 5V/2.4A to 5V/1A 0 twenty four Convert 9V/2.6A to 12V/2.6A 9V/1A 5V/3A 5V/2.4A to 5V/1A 0 25 Convert 12V/2.7A to 15V/2.6A 5V/3A 5V/2.4A to 5V/1A 0 26 Convert 15V/2.6A to 20V/2.3A 9V/1A 5V/2.4A to 5V/1A 0 27 Convert 20V/2.4A to 20V/2.75A 5V/2.4A to 5V/1A 0

To further illustrate with an example, please refer to Figure 1, Figure 9 and Table 3 at the same time. In this example, the Type-C ports (ie, USB ports 120_1~120_3) are connected to the external device earlier than Type-C ports. The time point when port A (ie, USB port 120_4) is connected to an external device. When the Type-A port is connected to an external device, the Type-A port will be current limited. Therefore, the Type-A port voltage value is 5 volts and the current value is 0.5 amperes. The power of the Type-A port is 2.5 watts. And at this point, the current limit flag value of the Type-A port is set to 0.

Regarding the 17th configuration, the common control circuit 140 determines in step S904 that the total power of the Type-C port (ie, 45 watts) is equal to the difference between the rated power TP and the reserved value T1 (ie, 45 watts). Therefore, the output power P1~P4 does not need to be transferred.

Regarding the eighteenth configuration, the common control circuit 140 determines in step S904 that the total power of the Type-C port (ie, 60 watts) is greater than the difference between the rated power TP and the reserved value T1 (ie, 45 watts). Therefore, step S906 is entered. In step S906, the common control circuit 140 determines that the power (ie, 27 watts) of the Type-C port (ie, the USB port 120_1) with the maximum power is greater than the reserved value T1 (ie, 15 watts), and It is determined that the current limit flag value is equal to 0. Therefore, the process proceeds to step S907. In step S907, the common control circuit 140 controls the power converter 130_4 to release the current limit of the Type-A port, and controls the power converters 130_1 and 130_4 to transfer the power difference of the USB port 120_1 to the Type-A port. In detail, the power of the USB port 120_1 will be reduced from 27 watts by 12 watts, thereby reducing the power to 15 watts (ie, new power). The 12 watts subtracted is the stated power difference. The Type-A port will receive the power difference, thereby increasing the current value of the Type-A port from 0.5 ampere to 2.4 ampere. Next, set the current limit flag value to 1.

In addition, the 18th configuration can obtain the second reference value equal to 5 according to formula (2). Therefore, the voltage value of the USB port 120_1 can be adjusted to 5 volts. And the current value of the USB port 120_1 is the quotient of the new power and voltage value, which is 3 amperes.

Regarding the 19th to 22nd configurations, the process of the 19th to 22nd configurations can be sufficiently taught in the description of the 18th configuration, so I will not repeat it here.

Regarding the 23rd configuration, the common control circuit 140 determines in step S904 that the total power of the Type-C port (ie, 48 watts) is greater than the difference between the rated power TP and the reserved value T1 (ie, 45 watts). Therefore, step S906 is entered. In step S906, the common control circuit 140 determines that the power of the Type-C port (ie, the USB port 120_2) with the maximum power (ie, 18 watts) is greater than the reserved value T1 (ie, 15 watts), and It is determined that the current limit flag value is equal to 1. Therefore, the process proceeds to step S909. In step S909, the common control circuit 140 determines that the power of the Type-A port has dropped to 5 watts, which is equal to the minimum reserved value T3, and also determines that the current limit flag value of the Type-A port is equal to 1. Therefore, it proceeds to step S910. In step S910, the voltage value of the USB port 120_4 is fixed to 5 volts, and the current value is adjusted from 2.4 amperes to 1 ampere. Therefore, the power of the USB port 120_4 will be reduced from 12 watts to 5 watts, resulting in a power difference of 7 watts. Therefore, the above 7-watt power difference is, for example (but not limited to) transfer to the USB port 120_2. Therefore, the power of the USB port 120_2 will increase from 18 watts to 25 watts. In addition, the 23rd configuration can obtain the third reference value equal to 12.3 according to formula (3). Therefore, the voltage value of the USB port 120_2 can be adjusted to 9 volts. And the current value of the USB port 120_2 is the quotient of the new power and voltage value, that is, 2.7 amperes.

Regarding the 24th to 27th configurations, the flow of the 24th to 27th configurations can be sufficiently taught in the description of the 23rd configuration, so I will not repeat it here.

It is worth mentioning here that in the 23rd~27th configurations, the power difference of the USB port 120_4 will be transferred to the Type-C port with the maximum power. In this way, charging of external devices with high power requirements can be accelerated. In some embodiments, the power difference is transferred to the Type-C port with the smallest power, but it is not limited to this.

Please return to step S703 of the third embodiment shown in FIG. 1 and FIG. 7 to FIG. 10. In step S703, the common control circuit 140 determines whether at least one of the Type-C ports (ie, the USB ports 120_1 to 120_3) is connected to the external device first. If the common control circuit 140 determines that the Type-A port is connected to the external device first, the step node E is entered.

Next, in step S1002 in FIG. 10, the common control circuit 140 obtains the maximum reserved value T2 and the minimum reserved value T3 corresponding to the Type-A port when the Type-A port is connected to the external device. In step S1003, the Type-C port is connected to an external device. The common control circuit 140 obtains the reserved value T1 corresponding to the Type-C port when the Type-C port is connected to the external device, and obtains the residual power REM. In addition, in step S1002, since the Type-A port will not be current limited, the current limit flag value will be set to 1.

In step S1004, the common control circuit 140 determines whether the power of the Type-C port is the same, and whether the power of the Type-A port is greater than the minimum reserved value T3. If the judgment result is "Yes", it means that the Type-A port power is still in use, and the power of the Type-C port of the external device is the same, so the output power does not need to be transferred, so it will go to the step S1005. In step S1005, the common control circuit 140 will wait. For example, the common control circuit 140 will wait (but not limited to) 10 minutes before returning to step S1004.

In step S1004, if the result of the judgment is "No", it means that the power of the Type-A port has fallen to less than or equal to the minimum reserved value T3, or the power of at least one of the Type-C ports Has changed (or is not exactly the same). In other words, the Type-A port's charging (or power supply) to external devices has ended or is about to end, and the Type-A port can transfer the power difference to one of the Type-C ports. The common control circuit 140 sets the current value of the Type-A port from the maximum rated current (for example, 2.4 amperes) to the minimum rated current (for example, 1 ampere) in step S1006, and sets the power difference of the Type-A port Transfer to one of the Type-C ports, such as the Type-C port with the highest power. The implementation details in step S1006 can be sufficiently taught in step S910, so they will not be repeated here. In addition, in step S1006, since the Type-A port can be regarded as being limited to the minimum rated current, the current limit flag value will be set to 0. Once the transfer is completed, step S1007 is entered. In step S1007, the common control circuit 140 will wait. For example, the common control circuit 140 will wait (but not limited to) 10 minutes before returning to step S1002.

Table 4 is a power supply comparison table of a multi-port power supply device according to an embodiment of the invention.

Table 4: Configuration CC1 (Type-C) CC2 (Type-C) CC3 (Type-C) CC4 (Type-A) 28 5V/3A 5V/3A 5V/3A 5V/2.4A 29 Convert 9V/2A to 9V/2.9A 9V/1.5A 5V/3A 5V/2.4A to 5V/1A 30 Convert 9V/2.6A to 12V/2.6A 9V/1A 5V/3A 5V/2.4A to 5V/1A 31 Convert 12V/2.7A to 15V/2.7A 5V/3A 5V/2.4A to 5V/1A 32 Convert 15V/2.6A to 20V/2.3A 9V/1A 5V/2.4A to 5V/1A 33 Convert 20V/2.4A to 20V/2.7A 5V/2.4A to 5V/1A

To further illustrate with an example, please refer to Figure 1, Figure 10 and Table 4 at the same time. In this example, the time when the Type-A port (ie, USB port 120_4) is connected to the external device will be earlier than the Type-C connection The time point when the ports (ie, USB ports 120_1~120_3) are connected to external devices.

Regarding the 28th configuration, the common control circuit 140 determines in step S1004 that the power of the Type-C port is the same, and the power of the Type-A port is greater than the minimum reserved value T3. The output power P1~P4 will not be transferred.

Regarding the 29th configuration, the common control circuit 140 determines in step S1004 that the power of the Type-C port is different. When the power of the Type-A port drops from 12 watts to 5 watts. Therefore, the power difference of 7 watts can be transferred to one of the Type-C ports, such as the USB port 120_1. After the USB port 120_1 receives the power difference, the power of the USB port 120_1 will increase from 18 watts to 26.5 watts according to the power difference and the remaining power (ie, 1.5 watts). In addition, the 29th configuration can obtain the third reference value equal to 8.8 according to formula (3). Therefore, the voltage value of the USB port 120_1 can be adjusted to 9 volts. And the current value of the USB port 120_1 is the quotient of the new power and voltage value, that is, 2.9 amperes.

Regarding the 30th to 33rd configurations, the process of the 30th to 33rd configurations can be sufficiently taught in the description of the 29th configuration, so I will not repeat it here.

Please refer to FIG. 11, which is a circuit block diagram of a multi-port power supply device according to another embodiment of the present invention. In this embodiment, the multi-port power supply device 200 includes a power supply circuit 110, USB ports 120_1~120_3, power converters 130_1~130_3, a common control circuit 140, and bypass switches 150_1~150_3. The number of power converters shown in Figure 11 is 3 (ie power converters 120_1~120_3), the number of USB ports is 3 (ie power converters 120_1~120_3), and the number of bypass switches is also 3 ( Namely, bypass switches 150_1~150_3). In other embodiments, the number of power converters, the number of USB ports, and the number of bypass switches can be adjusted/set according to design requirements. The coupling method between the power supply circuit 110, the USB ports 120_1~120_3, the power converter 130_1~130_3, and the common control circuit 140 of this embodiment can be sufficiently taught from the implementation details of FIG. 1, so it will not be repeated here. Narrated.

In the embodiment shown in FIG. 11, the first ends of the bypass switches 150_1 to 150_3 are coupled to the power supply circuit 110 to receive the source power Ps. The second ends of the bypass switches 150_1 to 150_3 are respectively coupled to the power pins of the USB ports 120_1 to 120_3 in a one-to-one manner. The control ends of the bypass switches 150_1 to 150_3 are respectively coupled to the power converters 130_1 to 130_3 in a one-to-one manner. The bypass switch 150_1 is turned on or off based on the control of the power converter 130_1. The same can be inferred that the bypass switches 150_2 and 150_3 will be turned on or turned off based on the control of the power converters 130_2 and 130_3, respectively. The common control circuit 140 receives the configuration information CC1~CC3 and uses the required voltage values of the configuration information CC1~CC3 to determine whether to instruct the power converters 130_1~130_3 to turn on or turn off the bypass switches 150_1~150_3. The bypass switches 150_1 to 150_3 of this embodiment can be implemented by at least one transistor switch, respectively.

For further explanation, please refer to FIG. 11 and FIG. 12 at the same time. FIG. 12 is a schematic diagram illustrating a part of the process of step S230 shown in FIG. 2 according to another embodiment of the present invention. For step S301, step S302, step node A, and step node B shown in FIG. 12, reference may be made to the related description of FIG. 3. The difference from FIG. 3 is that the embodiment shown in FIG. 12 further adds step S303 and step S304.

In this embodiment, the common control circuit 140 learns the maximum required voltage value and the minimum required voltage value among the voltage requirements of the USB ports 120_1~120_3 in step S301, and according to the power of the USB ports 120_1~120_3 Need to calculate the total power. The common control circuit 140 may determine in step S302 whether the USB ports 120_1 to 120_3 are connected to an external device with a programmable power supply function. If the common control circuit 140 determines in step S302 that any one of the USB ports 120_1 to 120_3 is connected to an external device with a programmable power supply function, then it proceeds to step node B. Conversely, if the common control circuit 140 determines in step S302 that none of the USB ports 120_1 to 120_3 are connected to an external device with a programmable power supply function, then step S303 is entered.

The common control circuit 140 can compare the required voltage values of the USB ports 120_1~120_3 with a preset voltage value to obtain a comparison result, and determine whether to turn on one or more of the bypass switches 150_1~150_3 according to the comparison result. For example, in step S303, the common control circuit 140 further determines whether the required voltage value of the USB ports 120_1 to 120_3 is greater than or equal to a preset voltage value (for example, 20 volts or other voltage levels). If the common control circuit 140 determines that the required voltage value of any one of the USB ports 120_1 to 120_3 is greater than or equal to the preset voltage value ("Yes" in step S303), then step S304 is entered.

Here, taking the demand voltage value of the USB port 120_3 greater than the preset voltage value (for example, 20 volts) as an example, in step S304, the common control circuit 140 instructs the power converter 130_3 to turn on the bypass switch 150_3. When the bypass switch 150_3 is turned on, the power converter 130_3 will not perform power conversion (that is, the power converter 130_3 will not supply power to the USB port 120_3), but the power supply circuit 110 will pass through the bypass The circuit switch 150_3 provides the source power Ps to the power pin of the USB port 120_3. The above-mentioned power supply mode is called the bypass power supply mode. That is, in step S304 (bypass power supply mode), the multi-port power supply device 200 will use the source power Ps to supply power to the USB port whose demand voltage value is greater than or equal to the preset voltage value through the bypass switch (continued For example, the USB port 120_3). When the USB ports 120_1~120_3 have higher demand voltage values, the power supply circuit 110 supplies the source power Ps to the USB ports 120_1~120_3 through the bypass switch, instead of the power converter 130_1~ 130_3 supplies power to the USB ports 120_1~120_3. In this way, the addition of the bypass switches 150_1~150_3 can be used to reduce the voltage loss of the power converter 130_1~130_3 during power transmission and the performance loss during power conversion of the source electric energy.

On the other hand, when the common control circuit 140 determines that the required voltage values of the USB ports 120_1~120_3 are all less than the preset voltage value (for example, 20 volts) ("No" in step S303), it proceeds to step node A, and also That is, it then proceeds to step S402 shown in FIG. 4.

Table 5 is a power supply comparison table of a multi-port power supply device according to an embodiment of the invention.

table 5: Configuration CC1 CC2 CC3 Total power 34 5V/3A 5V/3A 5V/3A 45 W 35 5V/3A 9V/2A 15V/1.8A 60 W 36 5V/3A 9V/2A 20V/1.35A (bypass power supply mode) 60 W 37 5V/3A 20V/1A (bypass power supply mode) 20V/1A (bypass power supply mode) 55 W 38 20V/1A (bypass power supply mode) 20V/1A (bypass power supply mode) 20V/1A (bypass power supply mode) 60 W

Please refer to FIG. 11, FIG. 12 and Table 5 at the same time. In this embodiment, the power supply comparison table in Table 5 lists examples of multiple configurations. The preset voltage value in this embodiment is, for example, 20 volts. The voltage value of the source power Ps in this embodiment is, for example, equal to the preset voltage value, that is, 20 volts. The current value of the source electric power Ps in this embodiment is, for example, 1 ampere. Regarding the 34th and 35th configurations, the common control circuit 140 determines in step S304 that the required voltage values of the USB ports 120_1 to 120_3 are all less than the preset voltage values, and then enters step node A.

Regarding the 36th configuration, the common control circuit 140 determines that the required voltage value of the USB port 120_3 is equal to the preset voltage value, and therefore proceeds to step S304. The common control circuit 140 instructs the power converter 130_3 to turn on the bypass switch 150_3. The multi-port power supply device 200 supplies power to the USB port 120_3 in the bypass power supply mode in step S304, so as to provide the source power Ps to the USB port 120_3 through the bypass switch 150_3 that is turned on. Regarding the 37th configuration, the common control circuit 140 will determine that the required voltage values of the USB ports 120_2 and 120_3 are equal to the preset voltage values, and therefore go to step S304. The bypass switches 150_2~150_3 will be turned on. In step S304, the multi-port power supply device 200 supplies power to the USB ports 120_2 and 120_3 in the bypass power supply mode, so as to provide the source power Ps to the USB ports 120_2 and 120_3. Regarding the 38th configuration, the common control circuit 140 will determine that the required voltage values of the USB ports 120_1 to 120_3 are equal to the preset voltage values, and therefore go to step S304. The bypass switches 150_1~150_3 will be turned on. In step S304, the multi-port power supply device 200 supplies power to the USB ports 120_1~120_3 in the bypass power supply mode, so as to provide the source power Ps to the USB ports 120_1~120_3.

In summary, in the embodiments of the present invention, the multi-port power supply device and the operation method dynamically adjust the power difference between the first power of a USB port at the first time and the second power at the second time. Transfer to another USB port. The multi-port power supply device and operation method also correspondingly control the power supply circuit according to the relationship between the total power and the threshold power to dynamically adjust the voltage of the source electrical energy. In this way, the present invention can dynamically improve the voltage conversion efficiency of the multi-port power supply device.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. Anyone with ordinary knowledge in the technical field can make some changes and modifications without departing from the spirit and scope of the present invention. The scope of protection of the present invention shall be determined by the scope of the attached patent application.

100, 200: Multi-port power supply device 110: Power supply circuit 120_1~120_4: USB port 130_1~130_4: power converter 140: common control circuit 150_1~150_3: Bypass switch A, B, C, D, E: step node CC1~CC4: configuration information P1~P4: output power Ps: source power S210, S220, S230, S240: steps S301~S304: steps S402~S410: steps S502~S505: steps S610, S620, S630, S640: steps S702~S703: steps S802~S808: steps S902~S911: steps S1002~S1007: steps

FIG. 1 is a schematic diagram of a circuit block of a multi-port power supply device according to an embodiment of the present invention. FIG. 2 is a schematic flowchart of the operation method according to the first embodiment of the present invention. 3 to 5 are schematic diagrams illustrating the flow of step S230 shown in FIG. 2 according to an embodiment of the present invention. FIG. 6 is a schematic flowchart of the operation method according to the second embodiment of the present invention. 7 to 10 are schematic diagrams of the operation method according to the third embodiment of the present invention. FIG. 11 is a circuit block diagram of a multi-port power supply device according to another embodiment of the invention. FIG. 12 is a schematic diagram illustrating a part of the flow of step S230 shown in FIG. 2 according to another embodiment of the present invention.

100: Multi-port power supply device

110: Power supply circuit

120_1~120_4: USB port

130_1~130_4: power converter

140: common control circuit

CC1~CC4: configuration information

P1~P4: output power

Ps: source power

Claims (24)

A multi-port power supply device, including: A plurality of USB ports, including a first USB port and a second USB port; A plurality of power converters are respectively coupled to the USB ports in a one-to-one manner, and are configured to supply power to the USB ports; and A common control circuit is coupled to the USB ports to learn the power changes of the USB ports, and is configured to correspondingly control the power converters to supply power to the USB ports according to the power requirements of the USB ports Port, wherein the common control circuit dynamically dynamically a power difference between a first power of the first USB port at a first time and a second power of the first USB port at a second time Transfer to the second USB port. In the multi-port power supply device described in claim 1, wherein the first time is earlier than the second time, and the first power is greater than the second power. According to the multi-port power supply device described in item 2 of the scope of patent application, in a continuous period during which an external device is electrically connected to the second USB port, the common control circuit is configured with a third Power is provided to the second USB port, and the common control circuit allocates a fourth power greater than the third power to the second USB port after the second time. In the multi-port power supply device described in item 1 of the scope of patent application, the first USB port is the one having the largest power among the USB ports at the first time, and the second USB connection The port is a USB port with the smallest power among the USB ports at the first time. For the multi-port power supply device described in claim 1, wherein a power of the second USB port at the first time is a primary power, and the common control circuit uses the primary power and the power difference A new power is calculated, and the common control circuit controls the power converters to allocate the new power to the second USB port after the second time. For example, in the multi-port power supply device described in claim 1, wherein a power of the second USB port at the first time is a raw power, the multi-port power supply device further includes: A power supply circuit for providing a source of electrical energy to the power converters; The common control circuit calculates a total power of the USB ports, the common control circuit calculates a residual power by using the power of the source electric energy and the total power, and the common control circuit uses the first power, a The reserved value, the original power and the remaining power calculate a new power, and the common control circuit controls the power converters to allocate the new power to the second USB port after the second time, wherein the reserved value Is a real number. For the multi-port power supply device described in item 6 of the scope of patent application, the reserved value is the product of a minimum rated voltage and a maximum rated current of the first USB port. The multi-port power supply device described in item 6 of the scope of patent application further includes: A plurality of bypass switches, wherein a first end of each of the bypass switches is coupled to the power supply circuit to receive the source power, and the second ends of the bypass switches are respectively coupled in a one-to-one manner On the power pins of these USB ports, The common control circuit compares the required voltage values of the USB ports with a predetermined voltage value to obtain a comparison result, and determines whether to turn on one or more of the bypass switches according to the comparison result. An operation method of a multi-port power supply device, wherein the multi-port power supply device includes a plurality of USB ports, the USB ports include a first USB port and a second USB port, and the operation method includes: A common control circuit learns the power changes of the USB ports; The common control circuit correspondingly controls a plurality of power converters according to the power requirements of the USB ports; According to the control of the common control circuit, the power converters respectively supply power to the USB ports in a one-to-one manner; and The common control circuit dynamically transfers a power difference between a first power of the first USB port at a first time and a second power of the first USB port at a second time to the The second USB port. According to the operating method described in claim 9, wherein the first time is earlier than the second time, and the first power is greater than the second power. The operation method described in item 10 of the scope of patent application further includes: During a continuous period when an external device is electrically connected to the second USB port, the common control circuit allocates a third power to the second USB port at the first time, and the common control circuit After the second time, a fourth power greater than the third power is allocated to the second USB port. According to the operating method described in item 9 of the scope of patent application, the first USB port is the one with the highest power among the USB ports at the first time, and the second USB port is The first USB port has the smallest power among the USB ports. For the operation method described in item 9 of the scope of patent application, wherein a power of the second USB port at the first time is a raw power, the operation method further includes: The common control circuit calculates a new power by using the original power and the power difference; and The common control circuit controls the power converters to allocate the new power to the second USB port after the second time. For the operation method described in item 9 of the scope of patent application, wherein a power of the second USB port at the first time is a raw power, the operation method further includes: A power supply circuit provides a source of electrical energy to the power converters; Calculating a total power of the USB ports by the common control circuit; The common control circuit calculates a residual power by using the power of the source electric energy and the total power; The common control circuit calculates a new power by using the first power, a reserved value, the original power and the remaining power, where the reserved value is a real number; and The common control circuit controls the power converters to allocate the new power to the second USB port after the second time. For the operation method described in item 14 of the scope of the patent application, the reserved value is a product of a minimum rated voltage and a maximum rated current of the first USB port. The operation method described in item 14 of the scope of patent application further includes: Comparing the required voltage values of the USB ports with a preset voltage value by the common control circuit to obtain a comparison result; and The common control circuit determines whether to turn on one or more of the bypass switches according to the comparison result, wherein a first end of each of the bypass switches is coupled to the power supply circuit to receive the source power, And the second ends of the bypass switches are respectively coupled to the power pins of the USB ports in a one-to-one manner. A multi-port power supply device, including: A power supply circuit for providing a source of power; Multiple USB ports; A plurality of power converters are respectively coupled to the USB ports in a one-to-one manner, wherein the power converters are coupled to the power supply circuit to receive the source power, and the power converters supply power to the USB ports. USB port; and A common control circuit is coupled to the USB ports to learn the power requirements of the USB ports, and is configured to correspondingly control the power converters to supply power to the USB ports according to the power requirements of the USB ports. USB ports, wherein the common control circuit calculates a total power of the USB ports, and the common control circuit correspondingly controls the power supply circuit to dynamically adjust the voltage of the source electric energy according to the relationship between the total power and a threshold power. For the multi-port power supply device described in item 17 of the scope of patent application, the threshold power is the product of a minimum rated voltage and a maximum rated current of the power supply circuit. For example, the multi-port power supply device described in item 17 of the scope of patent application, wherein when the total power is less than the threshold power, the common control circuit sets the voltage of the source power of the power supply circuit to the voltage of the USB ports A minimum rated voltage. For example, the multi-port power supply device described in item 17 of the scope of patent application, wherein when the total power is greater than or equal to the threshold power and less than or equal to a rated power of the power supply circuit, the common control circuit calculates the total power and A quotient of a maximum rated current of the power supply circuit, and the common control circuit sets the voltage value of the source electric energy of the power supply circuit as the quotient. An operation method of a multi-port power supply device, wherein the multi-port power supply device includes a plurality of USB connection ports, and the operation method includes: A power supply circuit provides a source of electrical energy to multiple power converters; Know the power requirements of the USB ports from a common control circuit; Calculating a total power of the USB ports by the common control circuit; The common control circuit correspondingly controls the power supply circuit according to the relationship between the total power and a threshold power to dynamically adjust the voltage of the source electrical energy; The common control circuit correspondingly controls the power converters according to the power requirements of the USB ports; and According to the control of the common control circuit, power is supplied to the USB ports by the power converters. The operation method described in item 21 of the scope of patent application includes: The common control circuit calculates the product of a minimum rated voltage and a maximum rated current of the power supply circuit as the threshold power. The operation method described in item 21 of the scope of patent application includes: When the total power is less than the threshold power, the common control circuit sets the voltage of the source power of the power supply circuit to a minimum rated voltage of the USB ports. The operation method described in item 21 of the scope of patent application includes: When the total power is greater than or equal to the threshold power and less than or equal to a rated power of the power supply circuit, the common control circuit calculates a quotient of the total power and a maximum rated current of the power supply circuit, and the The common control circuit sets the voltage value of the source electric energy of the power supply circuit as the quotient.

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