CN106774764B - Method for realizing multi-power supply USB interface and USB power supply - Google Patents
Method for realizing multi-power supply USB interface and USB power supply Download PDFInfo
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- CN106774764B CN106774764B CN201611103871.1A CN201611103871A CN106774764B CN 106774764 B CN106774764 B CN 106774764B CN 201611103871 A CN201611103871 A CN 201611103871A CN 106774764 B CN106774764 B CN 106774764B
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- 238000006243 chemical reaction Methods 0.000 claims description 42
- 238000004891 communication Methods 0.000 claims description 6
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- 230000017525 heat dissipation Effects 0.000 abstract description 6
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
- G06F1/266—Arrangements to supply power to external peripherals either directly from the computer or under computer control, e.g. supply of power through the communication port, computer controlled power-strips
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/66—Structural association with built-in electrical component
- H01R13/665—Structural association with built-in electrical component with built-in electronic circuit
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/66—Structural association with built-in electrical component
- H01R13/665—Structural association with built-in electrical component with built-in electronic circuit
- H01R13/6675—Structural association with built-in electrical component with built-in electronic circuit with built-in power supply
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Abstract
A method for realizing a multi-power supply USB interface and a USB power supply are provided, wherein the USB power supply comprises a USB interface supporting positive and negative insertion; a power path management module including a first set of interfaces and a second set of interfaces and a switch array, the first set of interfaces being connected to the power supply port of the USB interface, the second set of interfaces including: an interface connected to the first DC supply and to the second DC supply; the control module can control the switch array according to the information acquired from the control port, so that the USB power supply can support positive and negative insertion to output a first direct current supply and/or a second direct current supply; wherein the first DC supply is a basic supply and the second DC supply is a personalized supply for the USB device. The invention can simplify the power supply of the USB equipment, improve the utilization efficiency of the power supply, reduce energy loss and heat dissipation measures, and is beneficial to the miniaturization of electronic equipment.
Description
Technical Field
The present invention relates to USB interfaces, and more particularly, to providing power supply using a USB interface.
Background
Because the current USB protocol provides that the USB interface adopts a single 5V power supply to supply power, the default output of the power supply of all the current USB interfaces is 5V, and the electronic equipment of the USB interfaces is 5V power supply input. In practical applications, the internal modules of the electronic device generally need different power supply voltages to supply power, for example: 12V, 5V, 3.3V, 1.8V, 1.2V and the like, and some of the requirements even reach more than 20V. At present, the power supplies required by the internal modules of the electronic equipment are all generated by the 5V power supply input by the USB interface through voltage reduction or voltage boosting conversion. The existing power supply mode has some problems: firstly, in the voltage reduction and voltage increase conversion processes of the power supply, due to the influence of conversion efficiency, a large amount of energy loss exists, and the utilization efficiency of the power supply is reduced; secondly, the energy loss of power conversion is dissipated in the form of heat, so that the temperature of the electronic equipment is increased, and various heat dissipation measures are required to reduce the temperature increase; again, some high performance but high power, high voltage components are limited in their application in portable electronic devices, such as: high performance audio devices, high performance motors, etc.
For the above reasons, some new USB interface power supply schemes are continuously emerging, such as: the protocols include QC2.0 protocol for increasing the output voltage of the USB Power supply to 12V, USB Power delivery protocol for increasing the output voltage of the USB Power supply to 20V and the like, and the USB Power supply problem is optimized by increasing the Power supply voltage of the USB Power supply. There are still some problems with such improved power supply approaches: firstly, the power supply voltage of the USB power supply is increased, the voltage withstanding requirement of a power supply voltage reduction conversion module of the electronic equipment is increased, and the corresponding cost is increased; secondly, when changing from high to low pressure, for example: when the voltage is reduced from 12V to 1.2V, the power conversion efficiency is low, which causes unnecessary energy loss and the adoption of heat dissipation measures, and is not beneficial to the miniaturization of electronic equipment.
Disclosure of Invention
The technical problem to be solved by the present invention is to overcome the above-mentioned deficiencies of the prior art, and to provide a USB power supply, which can simplify the power supply of the USB device, improve the power utilization efficiency, reduce the energy loss, reduce the heat dissipation measures, and is beneficial to the miniaturization of the electronic device.
The technical scheme provided by the invention aiming at the technical problem comprises that a USB power supply is provided, which comprises a USB interface supporting positive and negative insertion; a power path management module including a first set of interfaces and a second set of interfaces and a switch array connected between the two sets of interfaces, the first set of interfaces being connected to the power supply ports of the USB interfaces, the second set of interfaces including: an interface connected to the first DC supply and an interface connected to the second DC supply; the control module is connected with the control port of the USB interface and can control the switch array according to the information acquired from the control port, so that the USB power supply can support positive and negative insertion to output first direct current supply and/or second direct current supply; wherein the first DC supply is a basic supply and the second DC supply is a personalized supply for the USB device.
The technical solution of the present invention, which is provided to solve the above technical problem, further includes providing a method for implementing a USB interface with multiple power supplies, including providing a USB power supply, and providing a power path management module in the USB power supply, so that the USB power supply includes a first group of interfaces, a second group of interfaces, and a switch array connected between the two groups of interfaces, where the first group of interfaces are connected to multiple power supply ports of the USB interface, and the second group of interfaces includes: an interface connected to the first DC supply and an interface connected to the second DC supply; the USB power supply is provided with a control module which is connected with a control port of a USB interface, and the switch array can be controlled according to information acquired from the control port, so that the USB power supply can support positive and negative insertion to output a first direct current supply and/or a second direct current supply; wherein the first DC supply is a basic supply and the second DC supply is a personalized supply for the USB device.
Compared with the prior art, the USB power supply can support the positive and negative insertion output of the first direct current supply and/or the second direct current supply and can support the output of multiple paths of different voltages by skillfully arranging the power path management module and the control module, thereby simplifying the power supply of the USB equipment, improving the utilization efficiency of the power supply, reducing energy loss and heat dissipation measures and being beneficial to the miniaturization of electronic equipment.
Drawings
Fig. 1a, 1b and 1c are block diagram illustrations of a USB power supply, a USB cable and a USB device of the present invention, respectively.
Fig. 2a and 2b are respectively a port definition of a standard TYPE-C USB receptacle and a port definition of a TYPE-C USB receptacle according to the present invention.
Fig. 2C and 2d are respectively a port definition of a standard TYPE-C USB plug and a port definition of a TYPE-C USB plug of the present invention.
Fig. 3 is a schematic flow chart of an implementation method of the multi-power-supply USB interface of the present invention.
Fig. 4 is a detailed flow chart illustrating a method for implementing a multi-power-supply USB interface according to the present invention, which is suitable for a situation where a USB device is connected to a USB power supply via a USB cable.
Fig. 5 is a detailed flow chart of the method for implementing a multi-power-supply USB interface according to the present invention, which is suitable for the case of direct-plug connection between a USB device and a USB power supply.
Fig. 6 is an electrical schematic of the USB power supply of the present invention.
Fig. 7 is an electrical schematic of the USB cable of the present invention.
FIG. 8 is an electrical schematic of the USB device of the present invention.
Wherein the reference numerals are as follows: 100 USB power source 120 USB device 160 first load 180 second load 101 power input 102 power conversion module 103 power path management module 1031 first interface 1032 second interface 104 USB interface 105 control module 121 first USB interface 123 second USB interface 125 identification module 141 USB interface 142 power path management module 143 power conversion module 144 control module 600 USB power source 601 power input 602 power conversion module 603 power path management module 604 USB interface 605 control module 700 USB cable 721 first USB interface 723 second USB interface 725 identification module 800 USB device 841 USB device 842 power path management module 844 control module 860 first load 880 second load.
Detailed Description
The present invention will be further explained in detail with reference to the accompanying drawings.
Referring to fig. 1a, 1b and 1c, fig. 1a, 1b and 1c are block diagram illustrations of a USB power supply, a USB cable and a USB device of the present invention, respectively. The invention provides a method for realizing a multi-power supply USB interface, and relates to a method for realizing a USB power supply 100, a USB cable 120 and USB equipment 140. The method can enable the USB power supply 100, the USB cable 120 and the USB equipment 140 to mutually detect and identify, and enable the USB power supply 100 to output a plurality of paths of power supplies with different voltages to supply power to the USB equipment 140 under the condition of meeting the conditions. The USB power supply 100 may be a USB host such as a computer or a USB power adapter as a power output terminal. The USB device 140 may be connected to the USB power source 100 through the USB cable 120 as a power input terminal, or may be directly connected to the USB power source 100 without a cable. The USB power supply 100 and the USB cable 120 of the present invention are compatible with the conventional single-channel USB devices.
Referring to fig. 1a, the USB power supply 100 includes: a power input 101, a power conversion module 102, a power path management module 103, a USB interface 104, and a control module 105.
Power input 101: the input power supply providing the USB power supply differs according to the type of the USB power supply 100. For example: the USB interface of the PC inputs Direct Current (DC) power; and the input of the power adapter is Alternating Current (AC) power.
The power conversion module 102: for converting the input power of the USB power supply 100 to provide the output power of the USB power supply. According to different USB power types, the power conversion modules are different: when the USB power supply input is an AC power supply, the power supply conversion module is an AC/DC rectification filter and a DC step-down transformer; when the USB power supply input is a direct current power supply, the power supply conversion module is used for converting a DC-DC power supply. The power conversion module 102 supports multiple dc outputs and has adjustable voltage. In this embodiment, the first DC supply output by the power conversion module 102 is 5V DC, and when the input power is normal, the first DC supply is the default output to supply the power requirements of other modules of the USB power supply 100 itself; the second DC supply output by the power conversion module 102 is 20V DC, and is off by default. It is worth mentioning that the second direct current supply can be adjusted within a certain range, for example: 3V-30V to meet the personalized requirements of the USB equipment.
Power path management module 103: is located between the output of the power conversion module 102 and the power port of the USB interface 104, and performs path control on the connection between the two. Firstly, when the USB device 140 is not plugged in, the output of the power conversion module 102 and the power path of the USB interface 104 are disconnected to meet the USB protocol requirement; secondly, since the USB Type-C interface supports two insertion directions, different outputs of the power conversion module 102 need to be controlled to be connected to the power ports of the corresponding USB interfaces 104 according to the insertion directions.
It is understood that the power path management module 103 includes a first set of interfaces 1031 and a second set of interfaces 1032, and a switch array connected between the two sets of interfaces 1031, 1032, the first set of interfaces 1031 being connected to the power supply ports of the USB interface 104, the second set of interfaces 1032 including: interface connected with first direct current supply and interface connected with second direct current supply
The USB interface 104: for connecting the USB cable 120 or the USB device 140, the USB interface of the present invention adopts a Type-C interface. In this embodiment, the USB interface 104 is a Type-C socket.
According to the USB protocol, the standard Type-C socket interface signal is defined as shown in FIG. 2a, wherein the A4, A9, B4 and B9 ports are all USB interface single power VBUS. The USB interface of the USB power supply 100 provided by the present invention modifies the standard Type-C interface definition, and splits the VBUS power supply port into multiple power supply ports. As shown in fig. 2B, in the present embodiment, a4 and B4 define VBUS1 (e.g., corresponding to the first dc supply), and a9 and B9 define VBUS2 (e.g., corresponding to the second dc supply), so that the dual power supply can be realized. In other embodiments, the four ports a4, a9, B4, and B9 may be defined as VBUS1, VBUS2, VBUS3, and VBUS4, respectively, to implement four-way power supply. The definitions and functions of the rest ports of the Type-C interface of the invention are consistent with those of the traditional USB Type-C interface, and are not described in detail herein.
It is worth mentioning that referring to the Type-C plug definition of fig. 2C and 2d, when the USB device 140 is connected in a plug-and-play manner, the USB power source 100 still uses the Type-C socket.
The control module 105: for controlling the power conversion module 102 and the power path management module 103 so that the USB interface 104 can provide the power supply required by the USB device 140. The control module 105 is connected to the control port of the USB interface 104, and can control the output voltage of the power conversion module 102 and the switch array of the power path management module 103 according to the information obtained from the control port, so that the USB power supply 100 can support the forward and backward insertion for outputting the first dc supply and/or the second dc supply.
Specifically, the main functions of the control module 105 include: firstly, completing the USB device 140 insertion identification process specified by the USB protocol, and establishing the normal identification of the USB power supply 100, the USB cable 120 and the USB device 140. And secondly, detecting the identification information of the USB cable 120, and reading cable parameters including the number of power supplies supported by the cable, rated current and the like. And thirdly, detecting the identification information of the USB equipment 140 and identifying the parameters of the equipment, including the quantity and voltage of the power supply required by the equipment. And fourthly, controlling the power conversion module 102 according to the identified identification information of the USB cable 120 and the USB equipment 140, and outputting a power supply meeting the requirement (mainly aiming at the personalized requirement of the USB equipment, and adjusting the second direct current supply to meet the requirement). Detecting the insertion direction of the USB interface 104, and controlling the power path management module 103 to output the power conversion module 102 to different VBUS ports according to different insertion directions. Sixthly, identifying the device parameters of the USB power supply 100, including the information of the number of the output-supported power supplies, the voltage range and the like, for the USB device 140 to detect.
Referring to fig. 1b, the USB cable 120 is an electronic identification (EMCA) cable, which includes: a first USB interface 121, a second USB interface 123 and an identification module 125.
First and second USB interfaces 121 and 123: USB Type-C plug is used, the standard USB Type-C plug interface definition is shown in fig. 2C, the USB Type-C plug interface definition of the present invention is shown in fig. 2d, and the power port definition is consistent with the USB interface VBUS port definition of the USB power supply 100 shown in fig. 2 b. VBUS of the two USB interfaces 121 and 123 at the two ends of the USB cable 120 correspond to each other, and are connected by independent power lines. The other port definitions of the USB interfaces 121, 123 are consistent with the standard USB type-C interface plug definition.
The identification module 125: for identifying the type and parameters of USB cable 120, including the number of power supplies supported by USB cable 120, the current rating of each power supply, etc.
Referring to fig. 1c, the USB device 140 includes: a USB interface 141, a power path management module 142, a power conversion module 143, and a control module 144.
The USB interface 141: the USB Type-C Type interface is adopted, and the Type of the interface is different according to the different types of USB equipment. For the direct-plug USB device without cable connection, the USB interface uses USB Type-C plug, and the interface definition is consistent with the interface definition of the USB cable 120, as shown in fig. 2 d; for the USB device requiring cable connection, the USB interface uses USB type-C socket, and the interface definition is consistent with that of the USB power supply 100, as shown in fig. 2 b.
Power path management module 142: the multi-path power supply input by the USB interface 141 is subjected to access control, and when positive and negative insertion directions of the USB Type-C interface are ensured, each path can be controlled to be accurately switched to the corresponding loads 160 and 180. For cable-connected USB devices, a power path management module 142 is necessary; for a plug-in type USB device, the power path management module 142 is not necessary.
The power conversion module 143: the USB power supply conversion device is used for carrying out power supply conversion on a USB input power supply and converting the input power supply into other required power supplies to supply power to a load; the module is an optional module, and if the USB multi-path power supply meets the requirement of equipment, the module is not needed.
The control module 144: for implementing the following functions: firstly, completing the USB interface identification process specified by the USB protocol, and establishing the normal connection of the USB power supply 100, the USB cable 120 and the USB equipment 140. And secondly, communicating with the control module 105 of the USB power supply 100 to acquire information of the USB power supply 100 and the USB cable 120. Thirdly, according to the acquired information of the USB power source 100 and the USB cable 120 and the detected insertion direction of the USB interface, the power path management module 142 is controlled to switch the input power of the USB interface 141 to the respective loads 160 and 180. And fourthly, identifying the equipment parameters of the USB equipment 140, including the information such as the number, the voltage and the like of the power supplies required by the support, and detecting the USB power supply 100.
Referring to fig. 3, fig. 3 is a schematic flow chart of an implementation method of the multi-power-supply USB interface of the present invention. The method for realizing the multi-power supply USB interface of the invention roughly comprises the following steps:
s301, corresponding four power supply ports defined by the USB interface standard to multiple paths of power supplies.
And S303, setting a power supply conversion module in the USB power supply, wherein the power supply conversion module is used for providing first direct current supply and second direct current supply.
S305, a power supply path management module is arranged in the USB power supply and used for switching a link between the power supply conversion module and the USB interface.
S307, setting a control module in the USB power supply, wherein the control module is used for controlling the power supply path management module and the power supply conversion module.
Referring to fig. 4, fig. 4 is a detailed flow schematic of a method for implementing a multi-power-supply USB interface of the present invention, and is suitable for a situation where a USB device is connected to a USB power supply via a USB cable. In this case, the method of the present invention comprises:
s401, the device is connected to a power supply through a cable, and the power supply identifies the device to be plugged in.
S403, identifying the cable insertion direction, and controlling the path management to output the first direct current supply to the equipment.
S405, starting an equipment detection module, and identifying the USB power access by equipment.
S407, if the cable is identified as the electronic identification cable?, the step is switched to S409, otherwise, the step is switched to S421.
And S409, supplying power to the cable by the power supply, and starting the identification module on the cable.
S411, the power supply/cable/equipment establishes communication, and the power supply reads information of the cable and the equipment.
S413, if it is determined whether the second dc supply satisfies the device power supply requirement?, go to step S415, otherwise go to step S423.
And S415, adjusting the second direct current supply, and outputting the multi-path power supply to the equipment through path management.
S417, the device detects the USB inserting direction and adjusts the circuit path management module to switch to different loads.
And S419, enabling the USB equipment to work normally.
S421, common passive cable, not support the multi-path power supply.
And S423, turning off the USB power supply, wherein the USB device does not work.
Referring to fig. 5, fig. 5 is a detailed flow chart illustrating a method for implementing a multi-power-supply USB interface of the present invention, which is suitable for a situation where a USB device is directly connected to a USB power supply. In this case, the method of the present invention comprises:
s501, the device is directly connected to a power supply, and the power supply identifies the insertion of the device.
S503, the power supply identifies the insertion direction of the equipment, and controls the path management to output first direct current supply to the equipment.
And S505, starting an equipment detection module, and identifying the USB power access by equipment.
And S507, the power supply/equipment establishes communication, and the power supply reads equipment information.
S509, if it is determined whether the second dc supply satisfies the device power supply requirement?, go to step S511, otherwise go to step S517.
And S511, adjusting the second direct current supply, and outputting the multi-path power supply to the equipment through path management.
S513, the device detects the direction of the power supply USB, and the circuit path management module is adjusted to switch to different loads.
And S515, the USB device works normally.
And S517, turning off the USB power supply, wherein the USB equipment does not work.
Referring to fig. 6, fig. 6 is an electrical schematic of the USB power supply of the present invention. The USB power supply 600 inputs 220V commercial power through the plug 601, and the power conversion module 602 converts the 220V AC power into a high-voltage DC power of about 300V by using an AC/DC rectification change module, and then steps down the high-voltage DC power through a DC step-down transformer. Wherein the DC step-down transformer supports two outputs OUT1, OUT2, and the output voltage is adjustable, wherein the output OUT1 (i.e. the first DC supply) defaults to 5V and the output OUT2 (i.e. the second DC supply) is turned off by default. The 5V power supply of output OUT1 simultaneously powers the control module 605 within the USB power supply 600.
The power path management module 603 of the USB power supply 600 employs 4-way power switches S1, S2, S3, S4, all of which are turned off by default. The power switches S1, S2, S3, S4 are controlled by the control module 605 in accordance with the USB Type-C protocol and the detected USB cable and device identification information.
The control module 605 selects a USB Type-C control chip, which supports the USB Power Delivery 2.0 protocol, and the working principle thereof is as follows.
Firstly, when the USB equipment is accessed through a USB cable, the USB Type-C control chip detects the access of the USB equipment and identifies the insertion direction of the USB interface. If the USB Cable is plugged, namely VBUS1(Cable) of the USB Cable corresponds to VBUS1(Host) of the USB power supply, the power switch S1 is controlled to be switched on, and first direct current is supplied to VBUS1(Host) and VBUS1 (Cable); if the USB Cable is reversely plugged, namely VBUS1(Cable) of the USB Cable corresponds to VBUS2(Host) of the USB power supply, the control power switch S3 is switched on, and the first direct current supply is provided for VBUS2(Host) and VBUS1(Cable), so that the first direct current supply is ensured to be provided for the USB device through VBUS1(Cable) of the Cable, and power is firstly supplied for a control module of the USB device.
And secondly, recognizing the insertion of the USB cable by the USB Type-C control chip, controlling the internal switch of the USB Type-C control chip to be switched on, and transmitting the first direct current supply provided by the output OUT1 to VCONN to supply power to the identification module of the USB cable.
The USBType-C control chip establishes USB Power Delivery protocol communication with the identification module of the USB cable and the control module of the USB device through the CC signal of the USB interface 604, reads identification information in the USB cable and the USB device, identifies whether the Type of the USB cable supports a plurality of Power supplies, and identifies Power supply voltage demand information of the USB device.
And fourthly, the USB Type-C control chip controls the output OUT2 of the power conversion module 602 to generate a second direct current supply required by the USB device according to the identified information of the USB device, and simultaneously turns on the power switch S2 or S4 corresponding to the forward insertion or the reverse insertion of the USB Cable respectively to input the second direct current supply to the VBUS2(Host) or the VBUS1(Host) and ensure that the second direct current supply is supplied to the USB device through the VBUS2(Cable) of the USB Cable.
As can be seen, the switch array of the power path management module 603 is composed of four power switches S1, S2, S3, S4, wherein the power switches S1, S3 are used to establish the supply link of the first dc supply (5V), and the power switches S2, S4 are used to establish the supply link of the second dc supply (20V). Specifically, the four power switches S1, S2, S3, S4 are all open by default, and when the USB power source is connected to the USB device, the control module 605 first closes the power switch S1 or S3 according to the insertion direction of the USB device, and keeps the other three power switches open, so that the USB power source outputs a first direct current to the USB device to establish communication; further, the control module 605 determines whether the second dc supply can meet the personalized requirements of the USB device, and if so, closes the power switch S2 or S4 according to the connection direction, and if not, opens all of the four power switches S1, S2, S3, and S4 again. In this embodiment, the power switches S1, S2, S3, and S4 are implemented by MOS transistors.
Referring to fig. 7, fig. 7 is an electrical schematic of the USB cable of the present invention. The USB cable 700 can be coupled to the USB power supply 600 of the present invention. The USB cable 700 supports dual power supply, and a dual VBUS cable is used therein to connect VBUS1 and VBUS2 of USB connectors 721 and 723 at both ends of the cable, respectively, to form two power transmission paths. The identification module 725 selects a USB Type-C electronic identification chip, is powered by the VCONN power provided by the USB power supply 600, and can identify parameters of the USB cable, such as supporting a dual power supply, a rated current and voltage of the power supply, a data rate of the cable, and the like.
Referring to fig. 8, fig. 8 is an electrical schematic diagram of a USB device with multiple power USB interfaces of the present invention. The USB device 800 may be connected to the USB power supply 600 of the present invention through the USB cable 700, and the USB power supply 600 provides power supply. The power path management module 842 of the USB device 800 employs four power switches S1, S2, S3, S4, wherein the power switches S1, S3 are turned on by default, and the power switches S2, S4 are turned off by default, to connect the 5V load path 860. When the USB device 800 is connected to the USB power source 600 through the USB Cable 700, the USB power source 600 outputs 5V power after detecting the USB device 800, and the 5V power is provided to the USB device 800 through VBUS1(Cable) of the USB Cable. Since the USB interface 841 of the USB Device 800 also supports a positive and negative insertion operation, the VBUS1(Cable) of the USB Cable 700 corresponds to VBUS1(Device) of the USB Device 800 at the time of the positive insertion; when unplugged, the VBUS1(Cable) of the USB Cable 700 corresponds to the VBUS2(Device) of the USB Device 800. Since power switches S1, S3 are turned on by default, there will be a first DC supply provided to control module 844 of USB device 800 whether it is plugged in or plugged in backwards.
The control module 844 selects a USB Type-C control chip to support the USB Power Delivery function. After recognizing the first dc supply provided by the USB power source 600, the interface recognition process at the USB device side is started to control the power path management module 842.
First, the control module 844 of the USB device 800 establishes USB Power Delivery protocol communication with the control module 605 of the USB Power supply 600 through the CC signal of the USB interface 841, may obtain identification information in the USB cable 700 and the USB Power supply 600, identify whether the type of the USB cable 700 supports multiple Power supplies, and identify Power supply voltage information that the USB Power supply 600 can provide.
Secondly, if the USB power supply 600 can meet the requirements of the equipment, the USB Type-C control chip identifies the insertion direction of the USB interface. If the USB Cable 700 is plugged, that is, VBUS1(Cable) of the USB Cable 700 corresponds to VBUS1(Device) of the USB Device, the power switch S3 is controlled to be turned off, the switch S4 is controlled to be turned on, and VBUS2(Device) is switched to the 20V load path 880; if the USB Cable 700 is reversely plugged, i.e. VBUS1(Cable) of the USB Cable 700 corresponds to VBUS2(Device) of the USB Device 800, the power switch S1 is controlled to be turned off, the switch S2 is controlled to be turned on, and VBUS1(Device) is switched to the 20V load path 880;
and thirdly, if the USB power supply 600 cannot meet the requirement of the device, the USB power supply 600 is informed to turn off the power supply output, and the USB device 800 does not work.
Compared with the prior art, the power path management module 103 and the control module 105 are skillfully arranged, so that the USB power supply 100 can support positive and negative insertion output of the first direct current supply and/or the second direct current supply, and can support multiple paths of different voltage outputs, thereby simplifying the power supply of the USB equipment, improving the utilization efficiency of the power supply, reducing energy loss and heat dissipation measures, and being beneficial to miniaturization of electronic equipment.
The above-mentioned embodiments are merely preferred examples of the present invention, and not intended to limit the present invention, and those skilled in the art can easily make various changes and modifications according to the main concept and spirit of the present invention, so that the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. A USB power supply comprises a USB interface supporting positive and negative insertion; it is characterized in that the USB power supply further comprises: a power path management module including a first set of interfaces and a second set of interfaces and a switch array connected between the two sets of interfaces, the first set of interfaces being connected to the power supply ports of the USB interfaces, the second set of interfaces including: an interface connected to the first DC supply and an interface connected to the second DC supply; the control module is connected with the control port of the USB interface and can control the switch array according to the information acquired from the control port, so that the USB power supply can support positive and negative insertion to output first direct current supply and/or second direct current supply; wherein the first DC supply is a basic supply and the second DC supply is a personalized supply for the USB device; the USB interface is provided with two groups of power supply ports, wherein one group of power supply ports corresponds to the first direct current supply, and the other group of power supply ports corresponds to the second direct current supply; the switch array of the power path management module is composed of four power switches S1, S2, S3, S4, wherein the power switches S1, S3 are used to establish a supply link for the first dc supply and the power switches S2, S4 are used to establish a supply link for the second dc supply.
2. The USB power supply of claim 1, wherein the four power switches S1, S2, S3 and S4 are all open by default, when the USB power supply is connected to a USB device, the control module first closes the power switch S1 or S3 and keeps the other three power switches open according to the insertion direction of the USB device, so that the USB power supply outputs a first direct current to the USB device to establish communication; furthermore, the control module determines whether the second dc supply can meet the personalized requirements of the USB device, and if so, closes the power switch S2 or S4 according to the connection direction, and if not, opens all of the four power switches S1, S2, S3, and S4 again.
3. The USB power supply of claim 1, wherein the USB power supply supports both direct connection to the USB device and connection to the USB device via a USB cable with an identification chip.
4. The USB power supply of claim 1, wherein the USB interface is a Type-C USB socket.
5. The USB power supply according to any of claims 1 to 4, further comprising: a power conversion module for converting a power input into the first and second DC supplies; the power conversion module is controlled by the control module, so that the second direct current supply can be adjusted within a set range to meet the personalized requirements of the USB equipment.
6. The USB power supply of claim 5, wherein the input of the power conversion module is DC, the power conversion module comprises a DC-DC power conversion circuit, and the DC-DC power conversion circuit is controlled by the control module.
7. The USB power supply of claim 5, wherein the input of the power conversion module is AC, the power conversion module comprises an AC/DC rectifying and filtering unit, a DC step-down transformer and a power control chip, and the power control chip is controlled by the control module.
8. A method for realizing a multi-power supply USB interface comprises a USB power supply, and is characterized in that a power path management module is arranged in the USB power supply and comprises a first group of interfaces, a second group of interfaces and a switch array connected between the two groups of interfaces, the first group of interfaces are connected with a plurality of power supply ports of the USB interfaces, and the second group of interfaces comprise: an interface connected to the first DC supply and an interface connected to the second DC supply; the USB power supply is provided with a control module which is connected with a control port of a USB interface, and the switch array can be controlled according to information acquired from the control port, so that the USB power supply can support positive and negative insertion to output a first direct current supply and/or a second direct current supply; wherein the first DC supply is a basic supply and the second DC supply is a personalized supply for the USB device.
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| CN201611103871.1A CN106774764B (en) | 2016-12-05 | 2016-12-05 | Method for realizing multi-power supply USB interface and USB power supply |
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| CN201611103871.1A CN106774764B (en) | 2016-12-05 | 2016-12-05 | Method for realizing multi-power supply USB interface and USB power supply |
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| CN106774764B true CN106774764B (en) | 2019-12-27 |
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| CN109346883B (en) * | 2018-09-20 | 2020-09-01 | 合肥联宝信息技术有限公司 | System for realizing positive and negative insertion of Type-C interface |
| CN109144215A (en) * | 2018-09-30 | 2019-01-04 | 联想(北京)有限公司 | A kind of control method and the first equipment |
| CN110492717A (en) * | 2019-07-01 | 2019-11-22 | 联想(北京)有限公司 | A kind of processing equipment and processing method |
| CN110752634B (en) * | 2019-10-12 | 2021-07-30 | 深圳慧能泰半导体科技有限公司 | USB Type-C interface circuit and charging method thereof, USB device and electronic equipment |
| TWI723920B (en) * | 2020-07-16 | 2021-04-01 | 宏碁股份有限公司 | Power delivery system with improved lifetime |
| CN118054389A (en) * | 2022-11-16 | 2024-05-17 | 华为技术有限公司 | Power supply equipment, power receiving equipment, chip and power supply system |
| CN117811143B (en) * | 2023-12-28 | 2025-03-04 | 深圳市欧姆微电子有限公司 | Charging control method, charging circuit and multi-port charger |
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Address after: Shandong City, Qingdao Province, Jiangxi City Road No. 11 Patentee after: Qingdao Hisense Mobile Communication Technology Co.,Ltd. Country or region after: China Address before: Shandong City, Qingdao Province, Jiangxi City Road No. 11 Patentee before: HISENSE MOBILE COMMUNICATIONS TECHNOLOGY Co.,Ltd. Country or region before: China |