Multi-output Universal Serial Bus Travel Adapter and its Control Method

Abstract

A multi-output Universal Serial Bus (USB) travel adapter and its control method are disclosed. The multi-output USB travel adapter includes: at least one AC-DC converter for converting AC power to generate a first DC power supply; at least one DC-DC converter for providing a second DC power supply based on the first DC power supply; a plurality of switches coupled to the AC-DC converter and / or the DC-DC converter for supplying the first or second DC power supply to a corresponding connector based on an operating signal; and a protocol controller for generating a plurality of operating signals to operate the plurality of switches based on at least one of the following parameters: a. connector type; b. whether a mobile device is plugged into the connector; c. a first command from the mobile device; d. power consumption of the mobile device; e. current flowing through the connector; and f. connector voltage.

Description

Technical Field

[0001] This invention relates to a multi-output universal serial bus travel adapter and its control method, and more particularly to a multi-output universal serial bus travel adapter and its control method that can dynamically adjust the electrical connection relationship between the AC-DC converter and the DC-DC converter and the connector. Background Technology

[0002] Please refer to Figure 1 The diagram shows a circuit schematic of a known multi-output Universal Serial Bus (USB) travel adapter 10. This prior art utilizes an AC-DC converter 101 and a DC-DC converter 102, each corresponding to different protocol controllers 104a and 104b. This configuration results in better efficiency at connector 103a because the output of AC-DC converter 101 is directly coupled to connector 103a. However, connector 103b typically has lower efficiency. Therefore, if there is only one mobile device, it must be plugged into connector 103a for optimal efficiency. If there are two mobile devices, the efficiency of this known USB travel adapter 10 deteriorates if the mobile device plugged into connector 103b consumes more power than the mobile device plugged into connector 103a. Summary of the Invention

[0003] In one viewpoint, the present invention provides a multi-output universal serial bus travel adapter, comprising: at least one AC-DC converter for converting an AC power supply to generate a first DC power supply; at least one DC-DC converter coupled to the AC-DC converter for providing a second DC power supply based on the first DC power supply; a plurality of connectors for receiving the first DC power supply or the second DC power supply to provide an output power supply to a mobile device plugged into the connectors; and a plurality of switches coupled to the at least one AC-DC converter and / or the at least one DC-DC converter, the switches being configured to, upon an operation signal, convert the AC power supply to the second DC power supply. A first DC power supply or the second DC power supply is provided to the corresponding connector; and a protocol controller, coupled to the plurality of switches, is used to generate a plurality of operating signals based on at least one of the following parameters to operate the plurality of switches, thereby determining 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 a mobile device is plugged into the 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.

[0004] In one embodiment, the connector is a Type-A Universal Serial Bus or a Type-C Universal Serial Bus.

[0005] In one embodiment, the AC-DC converter includes a flyback converter.

[0006] In one embodiment, the DC-DC converter includes a step-down converter or a step-up / down converter.

[0007] In one embodiment, the protocol controller also controls the AC-DC converter according to a second instruction from the mobile device to dynamically adjust the first DC power supply.

[0008] In one embodiment, the protocol controller also controls the DC-DC converter according to a third instruction from the mobile device to dynamically adjust the second DC power supply.

[0009] In one embodiment, the protocol controller is integrated into the AC-DC converter or the DC-DC converter.

[0010] In one embodiment, the protocol controller also generates a reset signal to operate the plurality of switches, thereby adjusting an output voltage of the output power supply to a preset potential or 0V during a reset period prior to determining the electrical connection relationship between the first DC power supply and the second DC power supply and the plurality of connectors.

[0011] In another viewpoint, the present invention provides a control method for a multi-output Universal Serial Bus travel adapter, comprising: converting an AC power supply to generate a first DC power supply; providing a second DC power supply based on the first DC power supply; providing a plurality of connectors for receiving the first DC power supply or the second DC power supply to provide an output power supply to a mobile device plugged into the connector; operating a switch according to an operation signal to provide the first DC power supply or the second DC power supply to the corresponding connector; and generating a plurality of the operation signals according to at least one of the following parameters to operate a plurality of the switches, thereby determining 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 a mobile device is plugged into the 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.

[0012] In one embodiment, the step of providing a second DC power supply based on the first DC power supply includes a step-down conversion step or a step-up / down conversion step.

[0013] In one embodiment, the control method further includes: according to a second instruction from the mobile device, converting the AC power supply to generate the first DC power supply, so as to dynamically adjust the first DC power supply.

[0014] In one embodiment, the control method further includes: according to a third instruction from the mobile device, converting the first DC power supply to generate the second DC power supply, so as to dynamically adjust the second DC power supply.

[0015] In one embodiment, the control method further includes: generating a reset signal to operate the plurality of switches, thereby adjusting an output voltage of the output power supply to a preset potential or 0V during a reset period prior to determining the electrical connection relationship between the first DC power supply and the second DC power supply and the plurality of connectors.

[0016] This invention proposes a multi-output universal serial bus travel adapter and its control method that can dynamically adjust the electrical connection relationship between the AC-DC converter and the DC-DC converter and the connector.

[0017] The advantages of this invention are that the multi-output universal serial bus travel adapter and its control method can achieve 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 maximum efficiency under any operating conditions.

[0018] The following detailed description through specific embodiments will make it easier to understand the purpose, technical content, features, and effects achieved by the present invention. Attached Figure Description

[0019] Figure 1 This is a circuit diagram showing a known multi-output universal serial bus travel adapter.

[0020] Figure 2 This is a circuit diagram showing a multi-output universal serial bus travel adapter according to an embodiment of the present invention.

[0021] Figure 3 This is a circuit diagram of an AC-DC converter with a multi-output universal serial bus travel adapter according to an embodiment of the present invention.

[0022] Figure 4This is a circuit diagram of a DC-DC converter with a multi-output universal serial bus travel adapter according to an embodiment of the present invention.

[0023] Figure 5 This is a circuit diagram of a DC-DC converter with a multi-output universal serial bus travel adapter according to another embodiment of the present invention.

[0024] Figure 6 According to an embodiment of the present invention, the output status of a multi-output universal serial bus travel adapter in standby mode is displayed according to the hardware configuration.

[0025] Figure 7 This invention relates to an embodiment of the present invention, which displays the operating status of a multi-output universal serial bus travel adapter.

[0026] Figure 8 This is a circuit diagram showing a multi-output universal serial bus travel adapter according to another embodiment of the present invention.

[0027] Figure 9 This is a circuit diagram showing a multi-output universal serial bus travel adapter according to another embodiment of the present invention.

[0028] Figure 10 This is a circuit diagram showing a multi-output universal serial bus travel adapter according to another embodiment of the present invention.

[0029] Figure 11 This is a schematic diagram showing the signal waveforms of a multi-output universal serial bus travel adapter according to an embodiment of the present invention.

[0030] Figure 12 This is a schematic diagram showing the signal waveforms of a multi-output universal serial bus travel adapter according to another embodiment of the present invention.

[0031] Explanation of symbols in the diagram

[0032] 10, 20, 60, 70, 80: Multi-output Universal Serial Bus Travel Adapter

[0033] 101, 201, 601, 701, 801[1]~801[x]: AC-DC converters

[0034] 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

[0035] 103a, 103b, 203a, 203b, 603a, 603b, 703[1]~703[n], 803

[11] ~803[1n], 803

[21] ~803[2m], 803[x1]~803[xr]: Connectors

[0036] 104a, 104b, 204, 604a, 604b, 704, 804[1]~804[x]: Protocol controllers

[0037] 205, 605, 705, 805: AC power supply

[0038] 206, 606, 706, 806[1]~806[x]: Multiple switches

[0039] GND: Grounding potential

[0040] intf: Interface

[0041] Sc1, Sc2~Scn, Sc11~Sc1n, Sc21~Sc2m, Scx1~Scxr: Communication signals

[0042] SET1, SET2~SETn, SET11~SET1n, SET21~SET2m, SETx1~SETxr: Setting signals

[0043] SW11, SW12~SW1n, SW21, SW22~SW2n, SWn1~SWnn, SW111~SW11n, SW121~SW12n, SW1n1~SW1nn: Switches

[0044] SW11G, SW12G~SW1nG, SW21G, SW22G~SW2nG, SWn1G~SWnnG, SW111G~SW11nG, SW121G~SW12nG, SW1n1G~SW1nnG: operation signal

[0045] t1, t2, t3, t4, t5, t6: Time points

[0046] Tr: During reset

[0047] VHI1, VHI11, VHI21, VHIx1: First DC power supply

[0048] VHI2~VHIn, VHI12~VHI1n, VHI22~VHI2m, VHIx2~VHIxr: Second DC power supply

[0049] VOUT[1], VOUT[2]~VOUT[n], VOUT

[11] ~VOUT[1n], VOUT

[21] ~VOUT[2m], VOUT[x1]~VOUT[xr]: Output voltage Detailed Implementation

[0050] The accompanying drawings in this invention are all schematic and are mainly intended to show the coupling relationship between various circuits and the relationship between various signal waveforms. The circuits, signal waveforms and frequencies are not drawn to scale.

[0051] Figure 2 This is a circuit diagram illustrating a multi-output universal serial bus travel adapter according to an embodiment of the present invention. Figure 2 As shown, 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 203a and 203b, a protocol controller 204, and multiple switches 206. The AC-DC converter 201 is used to convert AC power 205 to generate a first DC power supply VHI1, while the at least one DC-DC converter 202 is coupled to the AC-DC converter 201 to provide a second DC power supply VHI2 according to the first DC power supply VHI1.

[0052] Connectors 203a and / or 203b are used to receive a first DC power supply VHI1 or a second DC power supply VHI2 to provide an output voltage VOUT[1] or VOUT[2] of the output power supply to a mobile device plugged into connectors 203a or 203b. A 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 a plurality of connectors 203a and 203b. The plurality of switches 206 include, for example but not limited to, switches SW11, SW12, SW21, and SW22. Switches SW11, SW12, SW21, and SW22 are respectively used to provide the first DC power supply VHI1 or the second DC power supply VHI2 to the corresponding connectors 203a or 203b according to operating signals SW11G, SW12G, SW21G, and SW22G.

[0053] Protocol controller 204 is coupled to a plurality of switches 206 to generate a plurality of operating signals SW11G, SW12G, SW21G, and SW22G based on at least one of the following parameters to operate the plurality of switches 206, thereby determining the electrical connection relationship between the first DC power supply VHI1 and the second DC power supply VHI2 and a plurality of connectors 203a and 203b: a. the type of connector 203a or 203b; b. whether a mobile device is plugged into connector 203a or 203b; c. a first command from the mobile device; d. the power consumption of the mobile device; e. the current flowing through connector 203a or 203b; and f. the voltage of connector 203a or 203b. AC-DC converter 201 provides internal power to DC-DC converter 202.

[0054] In one embodiment, the protocol controller 204 is powered by the AC-DC converter 201. In one embodiment, connectors to mobile devices that require higher power, higher voltage, or higher current are coupled to the AC-DC converter 201 via multiple switches 206. In one embodiment, when one mobile device requires high voltage but has lower power consumption, and another mobile device requires low voltage but has higher power consumption, the mobile device requiring lower voltage will be coupled to the AC-DC converter 201 via multiple switches 206, and the DC-DC converter 202 will be a boost converter.

[0055] In one embodiment, if the voltage provided by the AC-DC converter 201 is fixed, it is first necessary to determine whether the voltage required by the mobile device matches the voltage that the AC-DC converter 201 can provide. Then, the connector connected to the mobile device with higher power consumption among the matching mobile devices is coupled to the AC-DC converter 201, while the connector connected to the mobile device that does not match is coupled to the DC-DC converter 202. In one embodiment, the protocol controller 204 includes a setting pin for generating a setting signal SET1 according to the instruction of the mobile device to set the operating voltage of the AC-DC converter 201. In one embodiment, the protocol controller 204 includes a setting pin for generating a setting signal SET2 according to the instruction of the mobile device to set the operating voltage of the DC-DC converter 202.

[0056] In one embodiment, connector 203a or 203b is a Type-A or Type-C Universal Serial Bus. In one embodiment, the type of connector 203a or 203b may be derived 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 characteristic pin of Type-A or Type-C. In one 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.

[0057] In one embodiment, the protocol controller 204 further controls the AC-DC converter 201 according to a second instruction from the mobile device to dynamically adjust the first DC power supply VHI1, for example, its voltage or current. In one embodiment, the protocol controller 204 further controls the DC-DC converter 202 according to a third instruction from the mobile device to dynamically adjust the second DC power supply VHI2, for example, its voltage or current. In one embodiment, the first, second, and third instructions may be partially transmitted via communication signals Sc1 or Sc2, which may be received from the communication pins of connectors 203a or 203b. In one embodiment, the communication pins may be DP pins or DM pins. In another embodiment, the communication pins may be CC1 pins or CC2 pins.

[0058] Figure 3 This is a circuit diagram of an AC-DC converter with a multi-output universal serial bus travel adapter according to an embodiment of the present invention. Figure 3 This is an exemplary embodiment of the AC-DC converter 201 of the multi-output universal serial bus travel adapter 20 of the present invention. In this embodiment, the AC-DC converter 201 is a flyback converter. Figure 4 This is a circuit diagram of a DC-DC converter with a multi-output universal serial bus travel adapter according to an embodiment of the present invention. Figure 4 This is an exemplary embodiment of the DC-DC converter 202 of the multi-output universal serial bus travel adapter 20 of the present invention. In this embodiment, the DC-DC converter 202 is a step-down converter.

[0059] Figure 5 This is a circuit diagram of a DC-DC converter with a multi-output universal serial bus travel adapter according to another embodiment of the present invention. Figure 5This is another exemplary embodiment of the DC-DC converter 202' of the multi-output universal serial bus travel adapter 20 of the present invention. In this embodiment, the DC-DC converter 202' is a step-up / down converter.

[0060] Figure 6 This invention relates to an embodiment of a multi-output universal serial bus travel adapter, which displays the output status according to hardware configuration in standby mode. Please also refer to... Figure 6 and Figure 2 When both connectors 203a and 203b are type C, AC-DC converter 201 is on, DC-DC converter 202 is off, connector 203a is not connected, and switches SW11 and SW12 are both off. Connector 203b is not connected, and switches SW21 and SW22 are both off. When connector 203a is type C and connector 203b is type A, AC-DC converter 201 provides 5V, DC-DC converter 202 is off, connector 203a is not connected, switches SW11 and SW12 are both off, connector 203b outputs 5V, switch SW21 is on, and switch SW22 is off.

[0061] When connector 203a is type A and connector 203b is type C, AC-DC converter 201 provides 5V, DC-DC converter 202 is off, connector 203a outputs 5V, switch SW11 is on, switch SW12 is off, connector 203b is not connected, and switches SW21 and SW22 are both off. When both connectors 203a and 203b are type A, in case 1, AC-DC converter 201 provides 5V, DC-DC converter 202 is off, connector 203a outputs 5V, switch SW11 is on, switch SW12 is off, connector 203b outputs 5V, switch SW21 is on, and switch SW22 is off; in case 2, AC-DC converter 201 and DC-DC converter 202 both provide 5V, connector 203a outputs 5V, switch SW11 is on, switch SW12 is off, connector 203b outputs 5V, switch SW21 is off, and switch SW22 is on. Of the two scenarios, scenario 1 is more efficient.

[0062] Figure 7 This invention relates to an embodiment of the present invention, which displays the operating status of a multi-output universal serial bus travel adapter. In this embodiment, connectors 203a and 203b are both type C, and the AC-DC converter 201 is a flyback converter, while the DC-DC converter 202 is a buck converter. Please also refer to... Figure 7 and Figure 2 When neither connector 203a nor 203b is inserted by the moving device, it is similar to Figure 6In standby mode, DC-DC converter 202 is disabled, and switches SW11, SW12, SW21, and SW22 are all disconnected.

[0063] When either connector 203a or 203b is inserted by the mobile device, if connector 203a is inserted, the DC-DC converter 202 is disabled, switch SW11 is turned on, and switches SW12, SW21, and SW22 are turned off; if connector 203b is inserted, the DC-DC converter 202 is disabled, switch SW21 is turned on, and switches SW11, SW12, and SW22 are turned off. When both connectors 203a and 203b are inserted by the mobile device, if the voltage of connector 203a is higher, the DC-DC converter 202 is enabled, switches SW11 and SW22 are turned on, and switches SW12 and SW21 are turned off; if the voltage of connector 203b is higher, the DC-DC converter 202 is enabled, switches SW12 and SW21 are turned on, and switches SW11 and SW22 are turned off.

[0064] Figure 8 This is a circuit diagram illustrating a multi-output universal serial bus travel adapter according to another embodiment of the present invention. In one embodiment, as... Figure 8 As shown, protocol controllers 604a and / or 604b are integrated into AC-DC converters 601 and / or DC-DC converters 602, respectively. In this embodiment, the AC-DC converter 601, DC-DC converter 602, multiple connectors 603a and 603b, AC power supply 605, and multiple switches 606 are similar to... Figure 2 The AC-DC converter 201, DC-DC converter 202, multiple connectors 203a and 203b, AC power supply 205, and multiple switches 206 in the embodiment are not described in detail. When protocol controllers 604a and 604b are integrated into AC-DC converter 601 and DC-DC converter 602 respectively, one protocol controller 604a or 604b is the primary one, and the other is the secondary one, and the two communicate through the intf interface. Figure 8 In the embodiment, the protocol controller 604b of the DC-DC converter 602 is primary.

[0065] Figure 9 This is a circuit diagram illustrating a multi-output universal serial bus travel adapter according to yet another embodiment of the present invention. This embodiment is similar to... Figure 2The difference in the embodiment is that DC-DC converters 702[1] to 702[n-1] are respectively coupled to AC-DC converter 701 to provide second DC power supplies VHI2 to VHIn according to the first DC power supply VHI1. Connectors 703[1] to 703[n] are used to receive the first DC power supply VHI1 or the second DC power supply VHI2 to VHIn to provide the output voltage VOUT[1] to VOUT[n] of the output power supply to the mobile device plugged into connectors 703[1] to 703[n].

[0066] Multiple switches 706 include, but are 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. Switches SW11~SW1n, switches SW21~SW2n, and switches SWn1~SWnn are respectively used to provide the first DC power supply VHI1 or the second DC power supply VHI2~VHIn to the corresponding connectors 703[1]~703[n] according to the operation signals SW11G~SW1nG, SW21G~SW2nG, and SWn1G~SWnnG. Protocol controller 704 is used to generate multiple operation signals SW11G~SW1nG, SW21G~SW2nG and SWn1G~SWnnG to operate switches SW11~SW1n, SW21~SW2n and SWn1~SWnn, thereby determining the electrical connection relationship between the first DC power supply VHI1 and the second DC power supply VHI2~VHIn and multiple connectors 703[1]~703[n].

[0067] Figure 10 This is a circuit diagram illustrating a multi-output universal serial bus travel adapter according to another embodiment of the present invention. This embodiment is similar to... Figure 2 The difference in the embodiment is that DC-DC converters 802[1,1] to 802[1,n-1] are respectively coupled to AC-DC converter 801[1] to provide second DC power supplies VHI12 to VHI1n according to the first DC power supply VHI11. DC-DC converters 802[2,1] to 802[2,m-1] are respectively coupled to AC-DC converter 801[2] to provide second DC power supplies VHI22 to VHI2m according to the first DC power supply VHI21. DC-DC converters 802[x,1] to 802[x,r-1] are respectively coupled to AC-DC converter 801[x] to provide second DC power supplies VHIx2 to VHIxr according to the first DC power supply VHIx1.

[0068] Connectors 803

[11] to 803[1n] are used to receive a first DC power supply VHI11 or a second DC power supply VHI12 to VHI1n to provide the output voltage VOUT

[11] to VOUT[1n] of the output power supply to the mobile device plugged into connectors 803

[11] to 803[1n]. Connectors 803

[21] to 803[2m] are used to receive a first DC power supply VHI21 or a second DC power supply VHI22 to VHI2m to provide the output voltage VOUT

[21] to VOUT[2m] of the output power supply to the mobile device plugged into connectors 803

[21] to 803[2m]. Connectors 803[x1] to 803[xr] are used to receive a first DC power supply VHIx1 or a second DC power supply VHIx2 to VHIxr to provide the output voltage VOUT[x1] to VOUT[xr] of the output power supply to the mobile device plugged into connectors 803[x1] to 803[xr].

[0069] Multiple 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. Switches SW111~SW11n, switches SW121~SW12n and switches SW1n1~SW1nn are respectively used to provide the first DC power supply VHI11 or the second DC power supply VHI12~VHI1n to the corresponding connectors 803

[11] ~803[1n] according to the operation signals SW111G~SW11nG, SW121G~SW12nG and SW1n1G~SW1nnG. Similarly, multiple switches 806[2] are similar to multiple switches 806[1], but their variable is m. Where m is a positive integer greater than 1. Similarly, multiple switches 806[x] are similar to multiple switches 806[1], but their variable is r. Where r is a positive integer greater than 1, and x is a positive integer greater than 1.

[0070] Protocol controller 804[1] generates multiple operation signals SW111G~SW11nG, SW121G~SW12nG and SW1n1G~SW1nnG to operate switches SW111~SW11n, SW121~SW12n and SW1n1~SW1nn, thereby determining the electrical connection relationship between the first DC power supply VHI11 and the second DC power supply VHI12~VHI1n and multiple connectors 803

[11] ~803[1n]. Similarly, protocol controller 804[2] generates multiple operation signals (not shown) to operate multiple switches 806[2], thereby determining the electrical connection relationship between the first DC power supply VHI21 and the second DC power supply VHI22~VHI2m and multiple connectors 803

[21] ~803[2m]. Similarly, the protocol controller 804[x] generates multiple operation signals (not shown) to operate multiple switches 806[x], thereby determining the electrical connection relationship between the first DC power supply VHIx1 and the second DC power supply VHIx2 to VHIxr, and multiple connectors 803[x1] to 803[xr].

[0071] Figure 11 This is a schematic diagram showing the signal waveforms of a multi-output universal serial bus travel adapter according to an embodiment of the present invention. Please also refer to... Figure 11 and Figure 2 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 load power of connector 203b is higher than the load power of connector 203a, or the current flowing through connector 203b is higher than the current flowing through connector 203a, the protocol controller 204 will further generate a reset signal to perform port swap, thereby operating multiple switches 206. During a reset period Tr before determining the electrical connection relationship between the first DC power supply VHI1 and the second DC power supply VHI2 and the multiple connectors 203a and 203b, the output voltages VOUT[1] and VOUT[2] of the output power supply are adjusted to 0V. After the reset period Tr, the second DC power supply VHI2 is output to connector 203a, and the first DC power supply VHI1 is output to connector 203b. Figure 11 For example, a mobile device inserts connector 203a at time t1 and requests a voltage of 6V at time t2, while another mobile device inserts connector 203b at time t3 and requests a voltage of 9V at time t4, thereby initiating port switching.

[0072] Figure 12 This is a schematic diagram showing the signal waveforms of a multi-output universal serial bus travel adapter according to another embodiment of the present invention. Please also refer to... Figure 12 and Figure 2 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 connector 203b is higher than the load power of connector 203a, or the current flowing through connector 203b is higher than the current flowing through connector 203a, the protocol controller 204 will further generate a reset signal to perform port swap to operate multiple switches 206. Then, during a reset period Tr before determining the electrical connection relationship between the first DC power supply VHI1 and the second DC power supply VHI2 and multiple connectors 203a and 203b, the output voltages VOUT[1] and VOUT[2] of the output power supply are adjusted to a preset potential, and after the reset period Tr, the second DC power supply VHI2 is output to connector 203a, and the first DC power supply VHI1 is output to connector 203b.

[0073] The present invention has been described above with reference to preferred embodiments. However, the above description is only intended to facilitate understanding of the invention by those skilled in the art and is not intended to limit the broadest scope of the invention. The described embodiments are not limited to individual application and can also be used in combination. For example, two or more embodiments can be used in combination, and some components of one embodiment can be used to replace corresponding components in another embodiment. Furthermore, within the same spirit of the invention, those skilled in the art can conceive of various equivalent changes and combinations. For example, the phrase "processing or calculating based on a signal or generating an output result" in the present invention is not limited to the signal itself, but also includes, when necessary, performing voltage-to-current conversion, current-to-voltage conversion, and / or proportional conversion on the signal, and then processing or calculating based on the converted signal to generate an output result. Therefore, within the same spirit of the invention, those skilled in the art can conceive of various equivalent changes and combinations, and there are many ways to combine them, which will not be listed here. Therefore, the scope of the present invention should cover the above and all other equivalent changes.

Claims

1. A multi-output universal serial bus travel adapter, characterized in that, Include: An AC-DC converter is used to convert an AC power supply to generate a first DC power supply. A DC-DC converter, coupled to the AC-DC converter, is used to provide a second DC power supply based on the first DC power supply; Multiple connectors, including a first connector and a second connector, each of the connectors being used to provide an output power to a mobile device plugged into the connector; Multiple switches are coupled to the AC-DC converter and / or the DC-DC converter, and to the first connector and the second connector; as well as A protocol controller, coupled to the plurality of switches, is configured to operate the plurality of switches based on at least one of the following parameters, thereby determining whether each connector is selectively electrically connected to the first DC power supply or the second DC power supply, or simultaneously electrically connected to the first DC power supply and the second DC power supply, or simultaneously electrically disconnected from the first DC power supply and the second DC power supply, thereby determining an electrical connection relationship between the first connector and the second connector corresponding to the first DC power supply and the second DC power supply: a. The type of the connector; b. Whether a mobile device is plugged into the connector; c. A first command from the mobile device; d. The power consumed by the mobile device; e. A current flowing through the connector; and f. A voltage of the connector; The electrical connection includes a port switching operation, in which the first connector is electrically connected to the first DC power supply and the second connector is electrically connected to the second DC power supply, and the connection is changed to the first connector being electrically connected to the second DC power supply and the second connector being electrically connected to the first DC power supply; wherein the AC-DC converter provides an internal power supply to the DC-DC converter.

2. The multi-output universal serial bus travel adapter as described in claim 1, wherein, The connector is a Type A Universal Serial Bus or a Type C Universal Serial Bus. When both the first connector and the second connector are inserted by their respective mobile devices, the protocol controller controls the multiple switches to supply power from the first DC power supply to the connector that provides the higher power output.

3. The multi-output universal serial bus travel adapter as described in claim 1, wherein, Both the first connector and the second connector are C-type universal serial buses. When the first connector and the second connector are both inserted by their respective mobile devices, the protocol controller controls the multiple switches to supply power to the first connector and the second connector that provides the higher voltage output power with the first DC power supply, and to the first connector and the second connector that provides the lower voltage output power with the second DC power supply.

4. The multi-output universal serial bus travel adapter as described in claim 1, wherein, The DC-DC converter includes a buck converter or a buck-boost converter.

5. The multi-output universal serial bus travel adapter as described in claim 1, wherein, The protocol controller also controls the AC-DC converter to dynamically adjust the first DC power supply based on a second instruction from the mobile device.

6. The multi-output universal serial bus travel adapter as described in claim 1, wherein, The protocol controller also controls the DC-DC converter to dynamically adjust the second DC power supply based on a third instruction from the mobile device.

7. The multi-output universal serial bus travel adapter as described in claim 1, wherein, The protocol controller is integrated into the AC-DC converter or the DC-DC converter.

8. The multi-output universal serial bus travel adapter as claimed in claim 1, wherein when the first connector and the second connector are both inserted by their respective corresponding mobile devices, the protocol controller, during the port switching operation, also generates a reset signal to operate the plurality of switches, thereby adjusting an output voltage of the 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, and after the reset period, switching the electrical connection relationship between the first connector and the second connector and the first DC power supply and the second DC power supply.

9. A control method for a multi-output universal serial bus travel adapter, characterized in that, Include: An AC power source is converted into a DC power source by an AC-DC converter; A second DC power supply is provided by a DC-DC converter based on the first DC power supply; Provide multiple connectors, including a first connector and a second connector, each of the connectors being used to provide an output power to a mobile device plugged into the connector; Multiple switches are provided, coupled to the AC-DC converter and / or the DC-DC converter, and coupled to the first connector and the second connector; as well as Based on at least one of the following parameters, multiple switches are operated to determine whether each connector is selectively electrically connected to the first DC power supply or the second DC power supply, or simultaneously electrically connected to the first DC power supply and the second DC power supply, or simultaneously electrically disconnected from the first DC power supply and the second DC power supply, thereby determining an electrical connection relationship between the first connector and the second connector corresponding to the first DC power supply and the second DC power supply: a. The type of the connector; b. Whether a mobile device is plugged into the connector; c. A first command from the mobile device; d. The power consumed by the mobile device; e. A current flowing through the connector; as well as f. A voltage of the connector; The electrical connection relationship includes a port switching operation, wherein the steps of the port switching operation include: switching from the first connector being electrically connected to the first DC power supply and the second connector being electrically connected to the second DC power supply to the first connector being electrically connected to the second DC power supply and the second connector being electrically connected to the first DC power supply.

10. The control method for a multi-output universal serial bus travel adapter as described in claim 9, further comprising: wherein, Each connector is a Type A Universal Serial Bus or a Type C Universal Serial Bus; when both the first connector and the second connector are inserted by their respective mobile devices, the first DC power supply is used to supply power to the one of the first connector and the second connector that provides the higher power output.

11. The control method for a multi-output universal serial bus travel adapter as described in claim 9, further comprising: wherein, Both the first connector and the second connector are C-type universal serial buses. When the first connector and the second connector are both inserted by their respective mobile devices, the multiple switches are controlled to supply power to the first connector and the second connector that provides the higher voltage output power supply with the first DC power supply, and to the first connector and the second connector that provides the lower voltage output power supply with the second DC power supply.

12. The control method for a multi-output universal serial bus travel adapter as described in claim 9, wherein, It also includes: generating the first DC power supply by converting the AC power supply according to a second instruction from the mobile device, so as to dynamically adjust the first DC power supply.

13. The control method for a multi-output universal serial bus travel adapter as described in claim 9, wherein, It also includes: generating the second DC power supply by converting the first DC power supply according to a third instruction from the mobile device, so as to dynamically adjust the second DC power supply.

14. The control method for a multi-output universal serial bus travel adapter as described in claim 9, wherein, It also includes: when the first connector and the second connector are both inserted by their respective mobile devices, during the port switching operation, generating a reset signal to operate the plurality of switches, thereby adjusting the output voltage of the 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, and after the reset period, switching the electrical connection relationship between the first connector and the second connector and the first DC power supply and the second DC power supply.

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