TWI807608B - Multiple outputs universal serial bus travel adaptor and control method thereof - Google Patents

Abstract

A multiple output universal serial bus travel adaptor includes: at least one AC-DC converter configured to generate a first DC power according to an AC power; at least one DC-DC converter configured to provide a second DC power according to the first DC power; plural switches, wherein the switch is coupled to the AC-DC converter and/or the DC-DC converter and is configured to provide the first DC power or the second DC power for corresponding connectors according to operation signals; and a protocol controller configured to generate the plural operation signals according to at least one of the following parameters: a. the types of the connectors; b. whether there is a mobile device connected to the connectors or not; c. a first command from the mobile devices; d. the consumed powers of the mobile devices; e. the currents flowing through the connectors; and f. the voltages at the connectors.

Description

Multi-output universal serial bus travel adapter and control method thereof

The present invention relates to a multi-output universal serial bus travel adapter and its control method, in particular to a multi-output universal serial bus travel adapter capable of dynamically adjusting the electrical connections between AC-DC converters, DC-DC converters and connectors and its control method.

Please refer to FIG. 1 , which shows a schematic circuit diagram of a conventional multi-output USB travel adapter 10 . This prior art utilizes an AC-DC converter 101 and a DC-DC converter 102, and the AC-DC converter 101 and the DC-DC converter 102 respectively correspond to different protocol controllers 104a and 104b. Such a configuration has better efficiency at the connector 103 a because the output of the AC-DC converter 101 is directly coupled to the connector 103 a. However, connector 103b generally has poor efficiency. So if there is only one mobile device, it must be plugged into the connector 103a for best efficiency. If there are two mobile devices, the conventional multi-output USB travel adapter 10 becomes less efficient once the mobile device plugged into connector 103b consumes more power than the mobile device plugged into connector 103a.

In view of this, the present invention proposes a multi-output universal serial bus travel adapter capable of dynamically adjusting the electrical connection relationship between the AC-DC converter and the DC-DC converter and the connector and its control method.

In one aspect, the present invention provides a multi-output universal serial bus travel adapter, which includes: at least one AC-DC converter for converting an AC power source to generate a first DC power source; at least one DC-DC converter coupled with the AC-DC converter for providing a second DC power source according to the first DC power source; a plurality of connectors for receiving the first DC power source or the second DC power source to provide an output power source for a mobile device plugged into the connector; An AC-DC converter and/or the at least one DC-DC converter are coupled, and the switch is used to provide the first DC power supply or the second DC power supply to the corresponding connector according to an operation signal; and a protocol controller, coupled to the plurality of switches, is used to generate a plurality of the operation signals according to at least one of the following parameters to operate the plurality of switches, and then determine the electrical connection relationship between the first DC power supply and the second DC power supply and the plurality of connectors: a. The type of the connector; b. Whether there is a mobile device plugged into the plurality of switches A connector; c. a first command from the mobile device; d. a power consumption of the mobile device; e. a current flowing through the connector; and f. a voltage of the connector; wherein the AC-DC converter provides an internal power supply to the DC-DC converter.

In one embodiment, the connector is a Type-A (Type-A) universal serial bus or a Type-C (Type-C) universal serial bus.

In one embodiment, the AC-DC converter includes a flyback converter.

In one embodiment, the DC-DC converter includes a step-down converter or a step-up/down converter.

In one embodiment, the protocol controller further controls the AC-DC converter according to a second command from the mobile device to dynamically adjust the first DC power supply.

In one embodiment, the protocol controller further controls the DC-DC converter according to a third command from the mobile device to dynamically adjust the second DC power supply.

In one embodiment, the protocol controller is integrated in the AC-DC converter or the DC-DC converter.

In one embodiment, the protocol controller further generates a reset signal to operate the plurality of switches, and then adjusts an output voltage of the output power source to a preset potential or 0V during a period of reset before determining the electrical connection relationship between the first DC power source and the second DC power source and the plurality of connectors.

In another viewpoint, the present invention provides a method for controlling a multi-output universal serial bus travel adapter, which includes: converting an AC power source to generate a first DC power source; providing a second DC power source according to the first DC power source; providing a plurality of connectors for receiving the first DC power source or the second DC power source to provide an output power source for a mobile device plugged into the connector; operating a switch according to an operation signal to provide the first DC power source or the second DC power source to the corresponding connector; and according to at least one of the following: Parameters, and generate a plurality of the operating signals to operate the plurality of switches, and then determine the electrical connection relationship between the first DC power supply and the second DC power supply, and the plurality of connectors: a. the type of the connector; b. whether there is a mobile device plugged into the connector; c. a first command from the mobile device; d. a power consumption of the mobile device;

In one embodiment, the step of providing a second DC power source according to the first DC power source includes a step-down conversion step or a step-up/down conversion step.

In one embodiment, the control method further includes: converting the AC power to generate the first DC power according to a second instruction from the mobile device, so as to dynamically adjust the first DC power.

In one embodiment, the control method further includes: converting the first DC power source to generate the second DC power source according to a third instruction from the mobile device, so as to dynamically adjust the second DC power source.

In one embodiment, the control method further includes: generating a reset signal to operate the plurality of switches, and then adjusting an output voltage of the output power supply to a preset potential or 0V during a period of reset before determining the electrical connection relationship between the first DC power supply, the second DC power supply, and the plurality of connectors.

The advantage of the present invention is that the multi-output universal serial bus travel adapter of the present invention and its control method can achieve the maximum efficiency under any hardware configuration by dynamically adjusting the electrical connection relationship between the AC-DC converter and the DC-DC converter and the connector, and can achieve the maximum efficiency under any operating conditions.

In the following detailed description by means of specific embodiments, it will be easier to understand the purpose, technical content, characteristics and effects of the present invention.

10,20,60,70,80: Multi-Output Universal Serial Bus Travel Adapter

101,201,601,701,801[1]~801[x]: AC-DC converter

102,202,202’,602,702[1]~702[n-1],802[1,1]~802[1,n-1],802[2,1]~802[2,m-1],802[x,1]~802[x,r-1]: DC-DC converter

103a, 103b, 203a, 203b, 603a, 603b, 703[1]~703[n], 803[11]~803[1n], 803[21]~803[2m], 803[x1]~803[xr]: connector

104a, 104b, 204, 604a, 604b, 704, 804[1]~804[x]: protocol controller

205,605,705,805: AC power supply

206,606,706,806[1]~806[x]: complex switch

GND: ground potential

intf: interface

Sc1, Sc2~Scn, Sc11~Sc1n, Sc21~Sc2m, Scx1~Scxr: communication signal

SET1, SET2~SETn, SET11~SET1n, SET21~SET2m, SETx1~SETxr: setting signal

SW11, SW12~SW1n, SW21, SW22~SW2n, SWn1~SWnn, SW111~SW11n, SW121~SW12n, SW1n1~SW1nn: switch

SW11G, SW12G~SW1nG, SW21G, SW22G~SW2nG, SWn1G~SWnnG, SW111G~SW11nG, SW121G~SW12nG, SW1n1G~SW1nnG: Operation signal

t1, t2, t3, t4, t5, t6: time points

Tr: reset period

VHI1, VHI11, VHI21, VHIx1: the first DC power supply

VHI2~VHIn, VHI12~VHI1n, VHI22~VHI2m, VHIx2~VHIxr: the second DC power supply

VOUT[1], VOUT[2]~VOUT[n], VOUT[11]~VOUT[1n], VOUT[21]~VOUT[2m], VOUT[x1]~VOUT[xr]: output voltage

FIG. 1 is a schematic circuit diagram of a conventional multi-output USB travel adapter.

FIG. 2 is a schematic circuit diagram showing a multi-output USB travel adapter according to an embodiment of the present invention.

FIG. 3 is a schematic circuit diagram showing an AC-DC converter of a multi-output USB travel adapter according to an embodiment of the present invention.

FIG. 4 is a circuit diagram showing a DC-DC converter of a multi-output USB travel adapter according to an embodiment of the present invention.

FIG. 5 is a schematic circuit diagram showing a DC-DC converter of a multi-output USB travel adapter according to another embodiment of the present invention.

FIG. 6 shows the output states of the multi-output USB travel adapter according to the hardware configuration in the standby state according to an embodiment of the present invention.

FIG. 7 shows the operation status of the multi-output USB travel adapter according to an embodiment of the present invention.

FIG. 8 is a circuit diagram showing a multi-output USB travel adapter according to another embodiment of the present invention.

FIG. 9 is a schematic circuit diagram showing a multi-output USB travel adapter according to yet another embodiment of the present invention.

FIG. 10 is a schematic circuit diagram showing a multi-output USB travel adapter according to yet another embodiment of the present invention.

FIG. 11 is a schematic diagram showing signal waveforms of a multi-output USB travel adapter according to an embodiment of the present invention.

FIG. 12 is a schematic diagram showing signal waveforms of a multi-output USB travel adapter according to another embodiment of the present invention.

The diagrams in the present invention are all schematic and mainly intended to show the coupling relationship between various circuits and the relationship between various signal waveforms. As for the circuits, signal waveforms and frequencies, they are not drawn to scale.

FIG. 2 is a schematic circuit diagram showing a multi-output USB travel adapter according to an embodiment of the present invention. As shown in FIG. 2 , the multi-output universal serial bus travel adapter 20 of the present invention includes at least one AC-DC converter 201 , at least one DC-DC converter 202 , multiple connectors 203 a , 203 b , protocol controller 204 and multiple switches 206 . The AC-DC converter 201 is used to convert the AC power 205 to generate the first DC power VHI1, and at least one DC-DC converter 202 is coupled to the AC-DC converter 201 for providing the second DC power VHI2 according to the first DC power VHI1.

The connectors 203a and/or 203b are used to receive the first DC power VHI1 or the second DC power VHI2 to provide the output voltage VOUT[1] or VOUT[2] of the output power to the mobile device plugged into the connectors 203a or 203b. The plurality of switches 206 are coupled to at least one AC-DC converter 201 and/or at least one DC-DC converter 202, and the plurality of switches 206 are coupled to the plurality of connectors 203a, 203b. The plurality of switches 206 includes, for example but not limited to, a switch SW11 , a switch SW12 , a switch SW21 and a switch SW22 . The switch SW11, the switch SW12, the switch SW21 and the switch SW22 are respectively used for providing the first DC power VHI1 or the second DC power VHI2 to the corresponding connector 203a or 203b according to the operation signals SW11G, SW12G, SW21G and SW22G.

The protocol controller 204 is coupled with the plurality of switches 206, and is used to generate the plurality of operation signals SW11G, SW12G, SW21G, and SW22G according to at least one of the following parameters to operate the plurality of switches 206, and then determine the electrical connection relationship between the first DC power supply VHI1 and the second DC power supply VHI2, and the plurality of connectors 203a and 203b: a. the type of the connector 203a or 203b; b. whether there is a mobile device plugged in at the connector 203a or 203b; c. the first command from the mobile device; d. the power consumption of the mobile device; e. the current flowing through the connector 203a or 203b; and f. The voltage of the connector 203a or 203b. The AC-DC converter 201 provides internal power to the DC-DC converter 202 .

In one embodiment, the protocol controller 204 is powered by the AC-DC converter 201 . In one embodiment, the connector connected to the mobile device with higher power consumption, higher voltage requirement or higher current requirement is coupled to the AC-DC converter 201 through the plurality of switches 206 . In one embodiment, when a mobile device requires high voltage but consumes low power, and another mobile device requires low voltage but consumes high power, the mobile device that consumes high power and requires low voltage is coupled to the AC-DC converter 201 through the plurality of switches 206, and the DC-DC converter 202 needs to use a boost converter.

In one embodiment, if the voltage provided by the AC-DC converter 201 is fixed, it is necessary to first determine whether the voltage required by the mobile device meets the voltage that the AC-DC converter 201 can provide, and then couple the connector connected to the mobile device with higher power consumption among the one or more mobile devices that meet the requirement to the AC-DC converter 201 , and couple the connector connected to the non-compliant mobile device to the DC-DC converter 202 . In one embodiment, the protocol controller 204 includes a setting pin for generating a setting signal SET1 for setting the operating voltage of the AC-DC converter 201 according to the command of the mobile device. In one embodiment, the protocol controller 204 includes a setting pin for generating a setting signal SET2 for setting the operating voltage of the DC-DC converter 202 according to the command of the mobile device.

In one embodiment, the connector 203 a or 203 b is a Type-A (Type-A) USB or a Type-C (Type-C) USB. In one embodiment, the type of the connector 203 a or 203 b can come from a detection pin or from an internal setting of the protocol controller 204 . In one embodiment, the aforementioned pin may be a dedicated pin or a type A or type C characteristic pin. Yu Yishi In an embodiment, the AC-DC converter 201 includes a flyback converter. In one embodiment, the DC-DC converter 202 includes a step-down converter or a step-up/down converter.

In one embodiment, the protocol controller 204 further controls the AC-DC converter 201 according to the second command from the mobile device, so as to dynamically adjust the voltage or current of the first DC power source VHI1 . In one embodiment, the protocol controller 204 further controls the DC-DC converter 202 according to the third instruction from the mobile device, so as to dynamically adjust the voltage or current of the second DC power source VHI2 . In one embodiment, the above-mentioned first command, second command and third command can be partly transmitted by the communication signal Sc1 or Sc2, and the communication signal Sc1 or Sc2 can be received from the communication pin of the connector 203a or 203b. In one embodiment, the communication pins may be DP pins or DM pins. In another embodiment, the communication pin can be a CC1 pin or a CC2 pin.

FIG. 3 is a schematic circuit diagram showing an AC-DC converter of a multi-output USB travel adapter according to an embodiment of the present invention. FIG. 3 is an exemplary embodiment of the AC-DC converter 201 of the multi-output USB travel adapter 20 of the present invention. In this embodiment, the AC-DC converter 201 is a flyback converter. FIG. 4 is a circuit diagram showing a DC-DC converter of a multi-output USB travel adapter according to an embodiment of the present invention. FIG. 4 is an exemplary embodiment of the DC-DC converter 202 of the multi-output USB travel adapter 20 of the present invention. In this embodiment, the DC-DC converter 202 is a step-down converter.

FIG. 5 is a schematic circuit diagram showing a DC-DC converter of a multi-output USB travel adapter according to another embodiment of the present invention. Fig. 5 is another exemplary embodiment of the DC-DC converter 202' of the multi-output USB travel adapter 20 of the present invention. In this embodiment, the DC-DC converter 202' is a step-up/down converter.

FIG. 6 shows the output states of the multi-output USB travel adapter according to the hardware configuration in the standby state according to an embodiment of the present invention. Please refer to FIG. 6 and FIG. 2 at the same time. When the connectors 203a and 203b are both C-type, the AC-DC converter 201 is turned on, the DC-DC converter 202 is turned off, the connector 203a is not connected, the switches SW11 and SW12 are turned off, the connector 203b is not connected, and the switches SW21 and SW22 are turned off. When the type of the connector 203a is C type and the type of the connector 203b is A type, the AC-DC converter 201 provides 5V, the DC-DC converter 202 is closed, the connector 203a is not connected, the switches SW11 and SW12 are both turned off, the connector 203b outputs 5V, the switch SW21 is turned on, and the switch SW22 is turned off.

When the type of the connector 203a is type A and the type of the connector 203b is type C, the AC-DC converter 201 provides 5V, the DC-DC converter 202 is closed, the connector 203a outputs 5V, the switch SW11 is turned on, the switch SW12 is turned off, the connector 203b is not connected, and the switches SW21 and SW22 are both turned off. When the connectors 203a and 203b are both type A, case 1 is that the AC-DC converter 201 provides 5V, the DC-DC converter 202 is closed, the connector 203a outputs 5V, the switch SW11 is turned on, the switch SW12 is turned off, the connector 203b outputs 5V, the switch SW21 is turned on, and the switch SW22 is turned off; case 2 is that the AC-DC converter 201 provides 5V, the DC-DC converter 202 provides 5V, the connector 203a outputs 5V, and the switch SW 11 is turned on, the switch SW12 is turned off, the connector 203b outputs 5V, the switch SW21 is turned off, and the switch SW22 is turned on. Case 1 is more efficient of the two cases.

FIG. 7 shows the operation status of the multi-output USB travel adapter according to an embodiment of the present invention. In this embodiment, the connectors 203 a and 203 b are C-type, and the AC-DC converter 201 is a flyback converter, and the DC-DC converter 202 is a step-down converter. Please refer to FIG. 7 and FIG. 2 at the same time. When the connectors 203a and 203b are not inserted by the mobile device, Similar to the standby state in FIG. 6 , the DC-DC converter 202 is disabled, and the switches SW11 , SW12 , SW21 , and SW22 are all turned off.

When one of the connectors 203a and 203b is inserted into the mobile device, if the connector 203a is inserted, the DC-DC converter 202 is disabled, the switch SW11 is turned on, and the switches SW12, SW21, and SW22 are turned off; When both the connectors 203a and 203b are inserted into the mobile device, if the voltage of the connector 203a is high, the DC-DC converter 202 is enabled, the switches SW11 and SW22 are turned on, and the switches SW12 and SW21 are turned off;

FIG. 8 is a circuit diagram showing a multi-output USB travel adapter according to another embodiment of the present invention. In one embodiment, as shown in FIG. 8 , the protocol controllers 604a and/or 604b are integrated in the AC-DC converter 601 and/or the DC-DC converter 602 respectively. The AC-DC converter 601, DC-DC converter 602, multiple connectors 603a, 603b, AC power source 605, and multiple switches 606 of this embodiment are similar to the AC-DC converter 201, DC-DC converter 202, multiple connectors 203a, 203b, AC power source 205, and multiple switches 206 of the embodiment in FIG. When the protocol controllers 604a and 604b are integrated in the AC-DC converter 601 and the DC-DC converter 602 respectively, one of the protocol controllers 604a or 604b is the master, and the other is the slave, and the two communicate through the interface intf. In the embodiment of FIG. 8, the protocol controller 604b of the DC-DC converter 602 is the master.

FIG. 9 is a schematic circuit diagram showing a multi-output USB travel adapter according to yet another embodiment of the present invention. The difference between this embodiment and the embodiment shown in FIG. 2 is that the DC-DC converters 702[1]~702[n-1] are respectively coupled to the AC-DC converter 701 to provide the second DC power sources VHI2~VHIn respectively according to the first DC power source VHI1. Connectors 703[1]~703[n] are used for Receive the first DC power VHI1 or the second DC power VHI2~VHIn to provide the output voltages VOUT[1]~VOUT[n] of the output power to the mobile devices plugged into the connectors 703[1]~703[n].

The plurality of switches 706 includes, for example but not limited to, switches SW11˜SW1n, switches SW21˜SW2n, and switches SWn1˜SWnn. Where n is a positive integer greater than or equal to 2. The switches SW11-SW1n, SW21-SW2n and SWn1-SWnn are respectively used to provide the first DC power VHI1 or the second DC power VHI2-VHIn to the corresponding connectors 703[1]-703[n] according to the operation signals SW11G-SW1nG, SW21G-SW2nG and SWn1G-SWnnG. The protocol controller 704 is used to generate a plurality of operation signals SW11G~SW1nG, SW21G~SW2nG, and SWn1G~SWnnG to operate the switches SW11~SW1n, SW21~SW2n, and SWn1~SWnn, and then determine the electrical connection relationship between the first DC power source VHI1 and the second DC power source VHI2~VHIn, and the plurality of connectors 703[1]~703[n].

FIG. 10 is a schematic circuit diagram showing a multi-output USB travel adapter according to yet another embodiment of the present invention. The difference between this embodiment and the embodiment shown in FIG. 2 is that the DC-DC converters 802[1,1]~802[1,n-1] are respectively coupled to the AC-DC converter 801[1], for providing the second DC power sources VHI12~VHI1n respectively according to the first DC power source VHI11. The DC-DC converters 802[2,1]-802[2,m-1] are respectively coupled to the AC-DC converter 801[2] for respectively providing the second DC power VHI22-VHI2m according to the first DC power VHI21. The DC-DC converters 802[x, 1]-802[x,r-1] are respectively coupled to the AC-DC converter 801[x] for respectively providing the second DC power VHIx2-VHIxr according to the first DC power VHIx1.

The connectors 803[11]~803[1n] are used to receive the first DC power VHI11 or the second DC power VHI12~VHI1n to provide the output voltage VOUT[11]~VOUT[1n] of the output power for the mobile device plugged into the connectors 803[11]~803[1n]. The connectors 803[21]~803[2m] are used to receive the first DC power supply VHI21 or the second DC power supply VHI22~VHI2m to provide the output voltage VOUT[21]~VOUT[2m] of the output power supply to be plugged into the connectors 803[21]~803[2m]. device. The connectors 803[x1]~803[xr] are used to receive the first DC power VHIx1 or the second DC power VHIx2~VHIxr to provide the output voltage VOUT[x1]~VOUT[xr] of the output power for the mobile device plugged into the connectors 803[x1]~803[xr].

The plurality of switches 806[1] include, for example but not limited to, switches SW111˜SW11n, switches SW121˜SW12n, and switches SW1n1˜SW1nn. Where n is a positive integer greater than 1. The switches SW111-SW11n, SW121-SW12n and SW1n1-SW1nn are respectively used for providing the first DC power VHI11 or the second DC power VHI12-VHI1n to the corresponding connectors 803[11]-803[1n] according to the operation signals SW111G-SW11nG, SW121G-SW12nG and SW1n1G-SW1nnG. By analogy, the complex number switch 806[2] is similar to the complex number switch 806[1], but its variable is m. Where m is a positive integer greater than 1. By analogy, the complex switch 806[x] is similar to the complex switch 806[1], but its variable is r. Where r is a positive integer greater than 1, and x is a positive integer greater than 1.

The protocol controller 804[1] is used to generate complex operation signals SW111G~SW11nG, SW121G~SW12nG, and SW1n1G~SW1nnG to operate the switches SW111~SW11n, SW121~SW12n, and SW1n1~SW1nn to determine the first DC power VHI11 and the second DC power VHI12~VHI1n, and the multiple connectors 803[11]~80 The electrical connection between 3[1n]. Similarly, the protocol controller 804[2] is used to generate a plurality of operation signals (not shown) to operate the plurality of switches 806[2] to determine the electrical connection relationship between the first DC power VHI21 and the second DC power VHI22~VHI2m, and the plurality of connectors 803[21]~803[2m]. Similarly, the protocol controller 804[x] is used to generate a plurality of operation signals (not shown) to operate the plurality of switches 806[x] to determine the electrical connection relationship between the first DC power supply VHIx1 and the second DC power supplies VHIx2-VHIxr and the plurality of connectors 803[x1]-803[xr].

FIG. 11 is a schematic diagram showing signal waveforms of a multi-output USB travel adapter according to an embodiment of the present invention. Please refer to FIG. 11 and FIG. 2 at the same time. In one embodiment, when the protocol controller 204 detects that the output voltage VOUT[2] is higher than the output voltage VOUT[1] or the connector When the load power of 203b is higher than the load power of the connector 203a or the current flowing through the connector 203b is higher than the current flowing through the connector 203a, the protocol controller 204 will further generate a reset signal Srst to perform port swap (port swap) to operate the plurality of switches 206, and then determine the electrical connection relationship between the first DC power source VHI1 and the second DC power source VHI2 and the plurality of connectors 203a, 203b During the reset period Tr, the output voltages VOUT[1] and VOUT[2] of the output power are adjusted to 0V, and after the reset period Tr, the second DC power VHI2 is output to the connector 203a, and the first DC power VHI1 is output to the connector 203b. In FIG. 11 , for example, a mobile device is plugged into the connector 203a at time point t1 and requires a voltage of 6V at time point t2, and another mobile device is plugged into connector 203b at time point t3 and requires a voltage of 9V at time point t4, thereby starting port exchange.

FIG. 12 is a schematic diagram showing signal waveforms of a multi-output USB travel adapter according to another embodiment of the present invention. Please refer to FIG. 12 and FIG. 2 at the same time. In another embodiment, when the protocol controller 204 detects that the output voltage VOUT[2] is higher than the output voltage VOUT[1] or the load power of the connector 203b is higher than the load power of the connector 203a or the current flowing through the connector 203b is higher than the current flowing through the connector 203a, the protocol controller 204 will further generate a reset signal Srst to perform port swap (port swap) to operate the plurality of switches 20 6. In a reset period Tr before determining the electrical connection between the first DC power VHI1 and the second DC power VHI2 and the plurality of connectors 203a and 203b, adjust the output voltages VOUT[1] and VOUT[2] of the output power to a preset potential, and after the reset period Tr, output the second DC power VHI2 to the connector 203a, and enable the first DC power VHI1 to output to the connector 203b.

The present invention has been described above with reference to preferred embodiments, but the above description is only for making those skilled in the art easily understand the content of the present invention, and is not intended to limit the scope of rights of the present invention. The described embodiments are not limited to single application, and can also be used in combination. For example, two or more embodiments can be used in combination, and some components in one embodiment can also be used to replace corresponding components in another embodiment. Furthermore, under the same spirit of the present invention, Those skilled in the art can think of various equivalent changes and various combinations. For example, the term "processing or computing based on a certain signal or generating a certain output result" in the present invention is not limited to the signal itself, but also includes performing voltage-current conversion, current-voltage conversion, and/or ratio conversion on the signal when necessary, and then processing or computing according to the converted signal to generate a certain output result. It can be seen that under the same spirit of the present invention, those skilled in the art can think of various equivalent changes and various combinations, and there are many combinations, which will not be listed here. Accordingly, the scope of the invention should encompass the above and all other equivalent variations.

20: Multi-Output Universal Serial Bus Travel Adapter

201:AC-DC Converter

202: DC-DC converter

203a, 203b: connector

204: Agreement controller

205: AC power supply

206: Complex switch

GND: ground potential

Sc1, Sc2: communication signal

SET1,SET2: set signal

SW11, SW12, SW21, SW22: switch

SW11G, SW12G, SW21G, SW22G: Operation signal

VHI1: The first DC power supply

VHI2: Second DC power supply

VOUT[1], VOUT[2]: output voltage

Claims (14)

A multi-output universal serial bus travel adapter, comprising: at least one AC-DC converter, which is used to convert an AC power source to generate a first DC power source; at least one DC-DC converter, coupled to the AC-DC converter, to convert the first DC power source to generate a second DC power source; a plurality of connectors, the plurality of connectors are used to receive the first DC power source or the second DC power source, so as to provide at least one corresponding output power source to be plugged into at least one mobile device corresponding to at least one of the plurality of connectors; Each of the plurality of switches is used to control the electrical connection relationship between the first DC power supply or the second DC power supply and the corresponding one of the plurality of connectors according to a corresponding operation signal; and a protocol controller, coupled to the plurality of switches, is used to generate a plurality of the operation signals according to at least one of the following parameters to operate the plurality of switches, and then determine the electrical connection relationship between the first DC power supply and the second DC power supply and the plurality of connectors: a. The type of the plurality of connectors; b. c. a first command corresponding to the at least one mobile device; d. a power consumption corresponding to the at least one mobile device; e. a current corresponding to the at least one output power supply; and f. a voltage corresponding to the at least one output power supply. The multi-output universal serial bus travel adapter as described in claim 1, wherein the type of the plurality of connectors includes a Type-A (Type-A) universal serial bus or a Type-C (Type-C) universal serial bus. The multi-output universal serial bus travel adapter as claimed in claim 1, wherein the AC-DC converter includes a flyback converter. The multi-output universal serial bus travel adapter as claimed in claim 1, wherein the DC-DC converter includes a step-down converter or a step-up/down converter. The multi-output USB travel adapter as claimed in claim 1, wherein the protocol controller further controls the AC-DC converter according to a second command from the at least one mobile device to dynamically adjust the first DC power supply. The multi-output USB travel adapter as claimed in claim 1, wherein the protocol controller further controls the DC-DC converter according to a third command from the at least one mobile device to dynamically adjust the second DC power supply. The multi-output universal serial bus travel adapter as claimed in claim 1, wherein the protocol controller is integrated in the AC-DC converter or the DC-DC converter. The multi-output USB travel adapter as described in claim 1, wherein the protocol controller further generates a reset signal to operate the plurality of switches, and then adjust at least one output voltage of the at least one output power source to a preset potential or 0V during a reset period before determining the electrical connection relationship between the first DC power source and the second DC power source and the plurality of connectors. A control method for a multi-output universal serial bus travel adapter, comprising: converting an AC power source to generate a first DC power source; converting the first DC power source to generate a second DC power source; Provide a plurality of connectors, the plurality of connectors are used to receive the first DC power supply or the second DC power supply to provide at least one corresponding output power to at least one mobile device corresponding to at least one of the plurality of connectors; operate a switch according to an operation signal to control the electrical connection relationship between the first DC power supply or the second DC power supply and the corresponding one of the plurality of connectors; The electrical connection relationship between the second DC power supply and the plurality of connectors: a. the type of the plurality of connectors; b. the plugging status of the plurality of connectors and 0 to a plurality of mobile devices; c. the at least one mobile device corresponds to a first command; d. the at least one mobile device corresponds to a power consumption; e. the at least one output power corresponds to a current; and f. the at least one output power corresponds to a voltage. The control method of the multi-output universal serial bus travel adapter as described in claim 9, wherein the type of the plurality of connectors includes a Type-A (Type-A) universal serial bus or a Type-C (Type-C) universal serial bus. The control method of the multi-output universal serial bus travel adapter as described in claim 9, wherein the step of converting the first DC power source to generate the second DC power source includes a step-down conversion step or a step-up/down conversion step. The control method of the multi-output USB travel adapter as described in claim 9 further includes: converting the AC power to generate the first DC power according to a second instruction from the at least one mobile device, so as to dynamically adjust the first DC power. The control method of the multi-output USB travel adapter as described in claim 9 further includes: converting the first DC power to generate the second DC power according to a third command from the at least one mobile device, so as to dynamically adjust the second DC power. The control method of the multi-output USB travel adapter as described in Claim 9 further includes: generating a reset signal to operate the plurality of switches, and then adjusting at least one output voltage of the at least one output power supply to a preset potential or 0V during a reset period before determining the electrical connection relationship between the first DC power supply and the second DC power supply and the plurality of connectors.

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