CN108170256B - USB-C dynamic power distribution system and power detection method thereof - Google Patents
USB-C dynamic power distribution system and power detection method thereof Download PDFInfo
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- CN108170256B CN108170256B CN201810123393.3A CN201810123393A CN108170256B CN 108170256 B CN108170256 B CN 108170256B CN 201810123393 A CN201810123393 A CN 201810123393A CN 108170256 B CN108170256 B CN 108170256B
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- 238000001514 detection method Methods 0.000 title claims abstract description 14
- 238000012544 monitoring process Methods 0.000 claims abstract description 21
- 238000004891 communication Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 4
- 238000003032 molecular docking Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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Classifications
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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
- G06F1/32—Means for saving power
- G06F1/3203—Power management, i.e. event-based initiation of a power-saving mode
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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
-
- 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
- H01R13/70—Structural association with built-in electrical component with built-in switch
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R27/00—Coupling parts adapted for co-operation with two or more dissimilar counterparts
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
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- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Sources (AREA)
Abstract
The invention discloses a USB-C dynamic power distribution system and a power detection method thereof, wherein the system comprises a USB-C plug, a PD controller, a microprocessor, a power management circuit, a power switch, a USB-C plug and a USB3.0 socket; wherein the USB-C plug is connected with the PD controller; the PD controller is connected with the microprocessor; the microprocessor is respectively connected with a power switch with power monitoring and a USB-C socket; the power management circuit is connected with the power switch. The device can expand the device of a plurality of output interfaces simultaneously, increases the utilization ratio, reduces the cost, and can monitor the power value of each output interface simultaneously so as to maximize the power of the PD power supply.
Description
Technical Field
The invention relates to the field of USB-C computers, tablets and mobile phone peripheral accessories and a detection method thereof, in particular to a USB-C dynamic power distribution system and a power detection method thereof.
Background
Since the push of USB-C interface (USB Type-C interface, abbreviated as USB-C), many computers, tablet computers, and mobile phones with USB-C interface appear on the market, and the USB-C interface of these devices can not only retain signals of USB3.1, but also support DP (DisplayPort) signal output. Because of the relatively few interfaces on these devices, a USB-C docking station is typically required to expand to different interfaces to meet different needs. Typically, these USB-C docking stations support PD charging, while having multiple USB interfaces and other interfaces. The USB interfaces need to supply Power to peripheral devices, and after the USB interfaces are connected to the USB devices, the Power required for the simultaneous operation is very high. Most USB-C docking stations intercept fixed power supply power from PD power supply and reserve the power for USB interface, even if the USB interface is not connected with equipment, the power of the USB interface is reserved for USB interface and can not be charged into computer. Sometimes, resources are left unused, and the power of the PD power supply cannot be utilized to the maximum.
Disclosure of Invention
The invention discloses a USB-C dynamic power distribution system and a power detection method thereof, which aim to solve the defects in the prior art.
The technical proposal is as follows: a USB-C dynamic power distribution system comprises a USB-C plug, a PD controller, a microprocessor, a power management circuit, a power switch, a USB-C plug, a USB3.0 socket, a USB hub and a DP video processor; the USB-C plug is connected with the PD controller; the PD controller is connected with the microprocessor; the microprocessor is respectively connected with a power switch with power monitoring and a USB-C socket; the power supply management circuit is connected with the power switch; the USB-C plug is connected with the USB hub and the DP video processor; the method is characterized in that: the USB-C interface expansion device comprises a power switch with current monitoring, and a current detection circuit is integrated in the power switch, so that the current flowing through the power switch can be accurately detected. The microprocessor can access the power switch through the I2C bus to read the current consumed by the USB interface. The microprocessor also detects whether a PD power supply is connected or not, and if so, the power of the PD power supply is detected through PD communication. The microprocessor then calculates how much power is available to charge the computer, the power to charge the computer = PD mains power-power consumed by the USB. The microprocessor scans every 1 second for a change in the power consumed by the USB, and if the change in the power consumed by the USB means that the power supplied to the computer is also changed, the microprocessor notifies the front-end PD controller to adjust the power so as to change the power which can be supplied to the computer.
Preferably, it is: the power switch is provided with a current monitoring function.
Preferably, it is: the microprocessor accesses the power switch via the I2C bus.
Preferably, it is: the power switch with current monitoring is internally integrated with a current detection circuit, so that the current flowing through the power switch can be accurately detected, and the detection error is smaller than 100mA. The microprocessor can access the power switch through the I2C bus to read the current consumed by the USB interface.
Preferably, it is: the microprocessor is an ARM Cortex-M032-bit microprocessor.
Preferably, it is: the power switch for current monitoring is provided with 8-gear current limiting thresholds which are adjusted through the I2C bus and are respectively 530mA, 960mA, 1070mA, 1280mA, 1600mA, 2130mA, 2670mA and 3200mA, so that the current limiting functions of different USB interfaces can be met.
Preferably, it is: the PD controller is responsible for processing USB-C power management and DP Alt-Mode handshakes.
Preferably, it is: the microprocessor is responsible for communicating with the PD power supply, and detects the output power of the PD power supply: by reading the current on the power switch with current monitoring, the power of the PD power supply, the power consumed by the device and the available power remained by the PD power supply are calculated, and then the PD controller is informed of the available power through PD communication.
Preferably, it is: the power management circuit is responsible for gating a power supply channel and outputting stable 5V and provides power for a 5V system. When the PD power is not connected, the strobe plug-Vbus is used as a power input; when the PD power is connected, strobe socket-Vbus is used as power input; when the power input is 5V, the power management circuit needs to output 5V, and when the power input is greater than 5V, the power management circuit also outputs 5V.
A power detection method based on a USB-C dynamic distribution power system is characterized in that: the microprocessor detects whether PD power is connected or not, if the PD power is connected, the power of the PD power is detected through PD communication, then a power switch with power monitoring is accessed through an I2C bus, how much power is actually consumed by all USB devices is read, and then the microprocessor calculates how much power can be provided for a computer to charge, and the power for charging the computer=the power of the PD power-the power consumed by the USB. The microprocessor scans every 1 second for a change in the power consumed by the USB, and if the change in the power consumed by the USB means that the power supplied to the computer is also changed, the microprocessor notifies the front-end PD controller to adjust the power so as to change the power which can be supplied to the computer.
The beneficial effects are that: the device can expand the device of a plurality of output interfaces simultaneously, increases the utilization ratio, reduces the cost, and can monitor the power value of each output interface simultaneously so as to maximize the power of the PD power supply.
Drawings
FIG. 1 is a schematic diagram of a USB-C dynamic power distribution system.
FIG. 2 is a schematic diagram of a power detection method of a USB-C dynamic power distribution system.
Detailed Description
A USB-C plug is connected with the USB hub and the DP video processor; the dynamic power distribution system comprises a USB-C plug, a PD controller, a microprocessor, a power management circuit, a power switch, a USB-C plug, a USB3.0 socket, a USB hub and a DP video processor; the USB-C plug is connected with the PD controller; the PD controller is connected with the microprocessor; the microprocessor is respectively connected with a power switch with power monitoring and a USB-C socket; the power supply management circuit is connected with the power switch; the power switch is connected with the USB; the power switch is provided with a current monitoring function. The power switch with current monitoring also supports a current limiting function, has current limiting thresholds of which 8 gears can be regulated through an I2C bus, namely 530mA, 960mA, 1070mA, 1280mA, 1600mA, 2130mA, 2670mA and 3200mA, and can meet the current limiting functions of different USB interfaces. The PD controller is responsible for processing USB-C power management and DP Alt-Mode handshakes. The microprocessor is responsible for communicating with the PD power supply, and detects the output power of the PD power supply: the method comprises the steps of calculating how much power is supplied to a PD power supply, how much power is consumed by the device, how much available power is left by the PD power supply by reading current on a power switch with current monitoring, and then informing a PD controller of how much available power can be supplied to the outside through PD communication; in the present invention, the microprocessor corresponds to a PD power supply for the PD controller. The power management circuit is responsible for gating a power supply channel and outputting stable 5V and provides power for a 5V system. When the PD power is not connected, the strobe plug-Vbus is used as a power input; when the PD power is connected, strobe socket-Vbus is used as power input; when the power input is 5V, the power management circuit needs to output 5V, and when the power input is greater than 5V, the power management circuit also outputs 5V.
Example 1
A power detection method of a USB-C dynamic allocation power system comprises the following steps: the microprocessor detects whether PD power is connected or not, if the PD power is connected, the PD power is detected through PD communication, then the power switch with power monitoring is accessed through the I2C bus, a power monitoring signal is output to the microprocessor, how much power is actually consumed by all USB devices is read, then how much power can be supplied to a computer through a subtraction circuit, if the power supplied to the computer changes, a PD controller at the front end is informed of adjusting the power, and whether the power consumed by the USB is changed or not is scanned every 1 second. By constantly monitoring the power change of the USB interface, the charging power that may be provided to the USB-C computer is dynamically adjusted.
The invention selects ARM Cortex-M032-bit as a microprocessor, and an analog comparator is integrated in the microprocessor to process PD communication signal reception; the transmission of the PD communication signals can be handled by the external resistor being configured to the level of the PD communication, so that the microprocessor can simulate USC-C PD communication. The microprocessor is mainly responsible for PD communication with an external PD power supply, acquires the maximum power of the PD power supply, reads two power switches with current monitoring through an I2C bus, counts the actual power currently consumed by all USB interfaces, and simultaneously sets the current limiting value of each USB interface. And calculating how much power needs to be provided by the current PD power supply for the docking station to use, and then informing the PD controller in front of the remaining PD power supply power through PD communication, and providing the PD controller for the computer to charge.
The power switch with current monitoring is selected, so that the current can be monitored in real time, and the microprocessor can access how much current is actually consumed through the I2C bus, so that the workload of the microprocessor is reduced. In addition, the power switch with current monitoring also supports a current limiting function, has 8-gear current limiting thresholds which can be adjusted through an I2C bus and are respectively 530mA, 960mA, 1070mA, 1280mA, 1600mA, 2130mA, 2670mA and 3200mA, and can meet the current limiting functions of different USB interfaces.
In the above description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The foregoing description is only of a preferred embodiment of the invention, which can be practiced in many other ways than as described herein, so that the invention is not limited to the specific implementations disclosed above. While the foregoing disclosure has been described with reference to certain embodiments, it will be understood by those skilled in the art that various changes and modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. Any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention without departing from the technical solution of the present invention still falls within the scope of the technical solution of the present invention.
Claims (4)
1. A USB-C dynamic power distribution system, characterized by: the device comprises a USB-C plug, a PD controller, a microprocessor, a power management circuit, a power switch, a USB-C plug, a USB3.0 socket, a USB hub and a DP video processor; wherein the USB-C plug is connected with the PD controller; the PD controller is connected with the microprocessor; the microprocessor is respectively connected with the power switch and the USB-C socket; the power supply management circuit is connected with the power switch; the USB-C plug is connected with the USB hub and the DP video processor;
the USB-C dynamic power distribution system comprises a power switch with current monitoring, wherein a current detection circuit is integrated in the power switch, so that the current flowing through the power switch can be accurately detected, and the detection error is smaller than 100mA; the microprocessor can access the power switch through the I2C bus to read the current consumed by the USB interface;
the method comprises the steps that a microprocessor detects whether a PD power supply is connected or not, if the PD power supply is connected, the power of the PD power supply is detected through PD communication, then a power switch with power monitoring is accessed through an I2C bus, how much power is actually consumed by all USB devices is read, and then the microprocessor calculates how much power can be provided for a computer to charge, and the power for charging the computer=the power of the PD power supply-the power consumed by the USB;
the microprocessor scans every 1 second for a change in the power consumed by the USB, and if the change in the power consumed by the USB means that the power supplied to the computer is also changed, the microprocessor notifies the front-end PD controller to adjust the power so as to change the power which can be supplied to the computer.
2. The USB-C dynamic power distribution system according to claim 1, wherein: the microprocessor is an ARM Cortex-M032-bit microprocessor.
3. The USB-C dynamic power distribution system according to claim 1, wherein: the power switch with current monitoring is provided with 8-gear current limiting thresholds which are adjusted through the I2C bus and are respectively 530mA, 960mA, 1070mA, 1280mA, 1600mA, 2130mA, 2670mA and 3200mA, so that the current limiting functions of different USB interfaces can be met.
4. The USB-C dynamic power distribution system according to claim 1, wherein: the power management circuit is responsible for gating a power supply channel and outputting stable 5V and supplying power to a 5V system; when the PD power is not connected, the strobe plug-Vbus is used as a power input; when the PD power is connected, strobe socket-Vbus is used as power input; when the power input is 5V, the power management circuit needs to output 5V, and when the power input is greater than 5V, the power management circuit also outputs 5V.
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| CN201810123393.3A CN108170256B (en) | 2018-02-07 | 2018-02-07 | USB-C dynamic power distribution system and power detection method thereof |
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| CN201810123393.3A CN108170256B (en) | 2018-02-07 | 2018-02-07 | USB-C dynamic power distribution system and power detection method thereof |
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| CN108170256B true CN108170256B (en) | 2024-03-26 |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109117405A (en) * | 2018-07-30 | 2019-01-01 | 合肥联宝信息技术有限公司 | A kind of TypeC equipment and its control method |
| CN109144229A (en) * | 2018-09-30 | 2019-01-04 | 联想(北京)有限公司 | A kind of power supply output management method, apparatus and electronic equipment |
| CN110018728B (en) * | 2019-03-29 | 2021-05-18 | 联想(北京)有限公司 | Electronic equipment |
| CN110941581B (en) * | 2019-11-04 | 2021-06-04 | 深圳慧能泰半导体科技有限公司 | Power adjusting method based on USB Type-C interface circuit, circuit thereof and electronic equipment |
| CN111190847B (en) * | 2019-12-16 | 2023-06-13 | 深圳慧能泰半导体科技有限公司 | Power adjusting method based on USB Type-C interface circuit, circuit and electronic equipment |
| CN112346551A (en) * | 2020-10-09 | 2021-02-09 | 安克创新科技股份有限公司 | Power distribution method, device and system of hub and storage medium |
| CN113794253A (en) * | 2020-10-29 | 2021-12-14 | 威锋电子股份有限公司 | Multi-port power supply device and operation method thereof |
| CN113472043A (en) * | 2021-07-05 | 2021-10-01 | 科博达技术股份有限公司 | double-Type-C port shared charging power charger and intelligent output power distribution method thereof |
| CN113672067B (en) * | 2021-08-07 | 2022-06-10 | 东莞市海能电子有限公司 | Lightning docking station and configuration device |
| CN114546040A (en) * | 2021-12-31 | 2022-05-27 | 深圳市和宏实业股份有限公司 | USB docking station for controlling output power and control method thereof |
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