CN110442220B - Power supply control device and method for USB-C interface equipment - Google Patents

Power supply control device and method for USB-C interface equipment Download PDF

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Publication number
CN110442220B
CN110442220B CN201910550010.5A CN201910550010A CN110442220B CN 110442220 B CN110442220 B CN 110442220B CN 201910550010 A CN201910550010 A CN 201910550010A CN 110442220 B CN110442220 B CN 110442220B
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interface
power supply
resistor
usb
current
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CN110442220A (en
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张清森
陈俊灵
肖政文
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Shenzhen Lvlian Technology Co Ltd
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Shenzhen Lvlian Technology Co Ltd
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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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/38—Information transfer, e.g. on bus
    • G06F13/382—Information transfer, e.g. on bus using universal interface adapter
    • G06F13/385—Information transfer, e.g. on bus using universal interface adapter for adaptation of a particular data processing system to different peripheral devices
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2213/00—Indexing scheme relating to interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F2213/0042—Universal serial bus [USB]
    • 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)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Power Sources (AREA)

Abstract

The application discloses a power supply control device and method for USB-C interface equipment, which comprises a USB-C interface, an external power supply interface, a switching module, a power supply adjusting module and a control module, wherein the control module is used for detecting whether the USB-C interface and the external power supply interface have power supply access or not, the switching module is used for switching the power supplies accessed by the USB-C interface and the external power supply interface, and the power supply adjusting module is used for adjusting the current of the accessed power supplies according to the difference of power supply input ends. Because the USB-C interface equipment can adjust the power supply current according to the difference of the power supply input ends, the USB-C interface equipment can automatically control the magnitude of the USB output current so as to reduce the risk of self-adaptive output current and improve the user experience.

Description

Power supply control device and method for USB-C interface equipment
Technical Field
The invention relates to the technical field of power supply control of USB-C interface equipment, in particular to a power supply control device and method for the USB-C interface equipment.
Background
The current of a power supply provided by a USB-C interface of a notebook computer in the current mainstream market is 1.5A or the current of the power supply provided by the USB-C interface with the lightning 3 function is 3A. Taking the current of the power supply provided by the USB-C interface as 1.5A as an example, when the load of the USB-C interface exceeds 1.5A current, the USB-C interface peripheral device connected to the computer cannot work normally, which generally indicates that the current is too large, the TYPE-C device cannot be used, and the notebook computer is burned out seriously. Therefore, in the prior art, a fixed current-limiting technology is applied to prevent the notebook computer from being burnt out, that is, an overcurrent protection device adopts a Positive Temperature Coefficient (PTC) mode, generally adopts a thermistor with a Positive Temperature Coefficient, but has great limitation in practical application, if the set current is too large, the risk degree of burning out the computer is improved, and if the set current is too small, the load power is reduced, and the maximum power of the peripheral equipment is reduced, so that the user experience is deteriorated. Therefore, it is desirable to provide a new power control apparatus for a USB-C interface peripheral device to optimize power management of the USB-C interface device.
Disclosure of Invention
The invention provides a power supply control device and a power supply control method for a USB-C interface device, which aim to overcome the defects of power supply management of the USB-C interface device in the prior art.
According to a first aspect, a power control apparatus for a USB-C interface device, comprises:
the USB-C interface is used for being connected with the USB-C interface of the computer;
the external power supply interface is used for inputting an external power supply;
the switching module is respectively connected with the USB-C interface and the external power supply interface, is used for respectively connecting with a power supply of the computer USB-C interface and an external power supply through the USB-C interface and the external power supply interface, and outputs the power supply of the computer USB-C interface or the external power supply;
the power supply adjusting module is connected with the switching module and is used for adjusting and outputting the electrical parameters of the power supply of the USB-C interface of the computer or the external power supply;
the control module is respectively connected with the external power interface, the USB-C interface, the switching module and the power supply adjusting module and is used for detecting whether a power supply is connected to the USB-C interface and the external power interface or not;
when the computer USB-C interface has power input and the external power interface has no power input, the control module is further used for controlling the switching module to output the power of the computer USB-C interface to the power adjusting module, and controlling the power adjusting module to adjust the power current of the computer USB-C interface to a first current value and then output the first current value to the computer USB-C interface peripheral equipment;
when the external power supply interface has power input, the control module is further used for controlling the switching module to output the external power supply to the power supply adjusting module, and controlling the power supply adjusting module to adjust the current of the external power supply to a second current value and then output the second current value to the computer USB-C interface peripheral equipment.
Further, the power supply adjusting module comprises a voltage adjusting circuit and a current adjusting circuit;
the voltage adjusting circuit is connected with the switching module and is used for adjusting and outputting the voltage of the power supply of the computer USB-C interface or the external power supply output by the switching module;
the current adjusting circuit is connected with the voltage adjusting circuit and used for adjusting the current of the computer USB-C interface power supply or the external power supply after voltage adjustment and outputting the current to the computer USB-C interface peripheral equipment.
Further, the control module includes a controller; the controller comprises a first control output end and a second control output end;
the first control output end and the second control output end are connected with the switching module, and the controller is used for sending high and low level signals to the switching module through the first control output end and the second control output end so as to control the switching module to output the power supply of the computer USB-C interface or an external power supply.
Further, the switching module comprises a switching circuit; the switching circuit comprises a field effect transistor Q41, a field effect transistor Q42, a field effect transistor Q43, a field effect transistor Q44, a resistor R41, a resistor R42, a resistor R43 and a resistor R44;
the drain electrode of the field effect tube Q41 is connected with the power supply access end of the USB-C interface; the source electrode of the field effect transistor Q41 is connected with the source electrode of the field effect transistor Q42 and serves as the output end of the switching circuit, and the power supply or the external power supply of the USB-C interface of the computer is output to the power supply adjusting module;
the grid of the field effect transistor Q41 is connected with one end of the resistor R41, the other end of the resistor R41 is connected with the source of the field effect transistor Q43 and one end of the resistor R42, and the other end of the resistor R42 is connected with the output end of the switching circuit;
the drain electrode of the field effect transistor Q42 is connected with the power supply access end of the external power supply interface; the grid electrode of the field-effect tube Q42 is connected with one end of the resistor R44, the other end of the resistor R44 is connected with the source electrode of the field-effect tube Q44 and one end of the resistor R43, and the other end of the resistor R43 is connected with the output end of the switching circuit;
the drain electrode of the field effect transistor Q43 is grounded, the grid electrode of the field effect transistor Q43 is connected with the first control output end and is connected with one end of the resistor R47, and the other end of the resistor R47 is grounded;
the drain electrode of the field effect transistor Q44 is grounded, the grid electrode of the field effect transistor Q44 is connected with the second control output end and is connected with one end of the resistor R48, and the other end of the resistor R48 is grounded.
Further, the controller further comprises a first voltage detection signal input terminal and/or a second voltage detection signal input terminal;
the control module further comprises:
the first voltage detection circuit is connected with a first voltage detection signal input end and a power supply input end of the USB-C interface and is used for detecting whether the USB-C interface has power supply access or not;
and/or the second voltage detection circuit is connected with a second voltage detection signal input end and a power supply input end of the external power supply interface and is used for detecting whether the external power supply interface has power supply access;
the first voltage detection circuit comprises a resistor R11 and a resistor R12; one end of a resistor R11 is connected with a power supply access end of the USB-C interface, the other end of the resistor R11 is connected with the first voltage detection signal input end and one end of a resistor R12, and the other end of the resistor R12 is grounded;
the second voltage detection circuit comprises a resistor R13 and a resistor R14; one end of the resistor R13 is connected with the power supply access end of the external power supply interface, the other end of the resistor R13 is connected with the second voltage detection signal input end and one end of the resistor R12, and the other end of the resistor R12 is grounded.
Further, the controller further comprises a first discharge signal output end and/or a second discharge signal output end;
the control module further comprises:
the first discharge circuit is connected with a first discharge signal output end and the power supply input end of the USB-C interface and is used for receiving a discharge signal of the controller through the first discharge signal output end to perform discharge protection on the power supply of the USB-C interface;
and/or the second discharge circuit is connected with the second discharge signal output end and the power supply access end of the external power supply interface and used for receiving the discharge signal of the controller through the second discharge signal output end to perform discharge protection on the power supply of the external power supply interface.
The first discharge circuit comprises a resistor R24, a resistor R25 and a field effect transistor Q21;
one end of the resistor R24 is connected with the power input end of the USB-C interface, and the other end of the resistor R is connected with the drain electrode of the field effect transistor Q21;
the source electrode of the field effect transistor Q21 is grounded;
the grid electrode of the field effect transistor Q21 is connected with the first discharge signal output end and one end of the resistor R25, and the other end of the resistor R25 is grounded;
the second discharge circuit comprises a resistor R31, a resistor R32 and a field effect transistor Q31;
one end of the resistor R31 is connected with the power input end of the external power interface, and the other end of the resistor R31 is connected with the drain electrode of the field effect transistor Q31;
the source electrode of the field effect transistor Q31 is grounded;
the gate of the field effect transistor Q31 is connected to the second discharge signal output terminal and one end of the resistor R32, and the other end of the resistor R32 is grounded.
Further, the controller further comprises a current adjustment control output end, which is used for sending a high-low level signal to the current adjustment circuit through the current adjustment control output end by the controller so as to control the current adjustment circuit to adjust the current of the voltage-adjusted power supply of the computer USB-C interface or the external power supply;
the current adjusting circuit comprises a current control device U51, a resistor R14, a resistor 15 and a field effect transistor Q51;
the current control device U51 includes an output terminal OUT, an input terminal IN, a ground terminal GND, a switch control terminal EN, and a current limit terminal ISET;
the input end IN and the switch control end EN of the current control device U51 are connected with the output end of the voltage regulating circuit and used as the input end of the current regulating circuit;
the ground terminal GND of the current control device U51 is grounded;
the output end OUT of the current control device U51 is used as the output end of the current adjusting circuit;
the current limiting end ISET of the current control device U51 is connected with one end of the resistor R52, and the other end of the resistor R52 is grounded;
the current limiting end ISET of the current control device U51 is also connected with one end of a resistor R51, and the other end of the resistor R51 is connected with the drain electrode of the field effect transistor Q51;
the grid electrode of the field effect transistor Q51 is connected with the current regulation control output end;
the source of the field effect transistor Q51 is grounded.
According to a second aspect, a computer USB-C interface peripheral device comprises the power control apparatus of the first aspect.
Further, the system also comprises a USB interface HUB, a video conversion module and/or an audio conversion module;
and the power supply of the USB interface HUB, the video conversion module and/or the audio conversion module is provided by the power supply adjusting module.
According to a third aspect, a power control method for a USB-C interface device, comprising:
the computer USB-C interface peripheral equipment detects whether a USB-C interface and an external power supply interface have power supply access; the USB-C interface is connected with a computer USB-C interface, and the external power supply interface is connected with an external power supply;
when the computer USB-C interface is detected to have power input and the external power interface does not have power input, adjusting the power current of the computer USB-C interface to a first current value and then outputting the first current value to the computer USB-C interface peripheral equipment;
and when the external power supply interface is detected to have power supply input, adjusting the external power supply current to a second current value and outputting the second current value to the computer USB-C interface peripheral equipment.
The power supply control device and the method for the USB-C interface equipment according to the embodiment comprise a USB-C interface, an external power supply interface, a switching module, a power supply adjusting module and a control module, wherein the control module is used for detecting whether the USB-C interface and the external power supply interface have power supply access or not, the switching module is used for switching the power supplies accessed by the USB-C interface and the external power supply interface, and the power supply adjusting module is used for adjusting the current of the accessed power supplies according to the difference of power supply input ends. Because the USB-C interface equipment can adjust the power supply current according to the difference of the power supply input ends, the USB-C interface equipment can automatically control the magnitude of the USB output current so as to reduce the risk of self-adaptive output current and improve the user experience.
Drawings
FIG. 1 is a schematic diagram of a power control apparatus for a USB-C interface device in one implementation;
FIG. 2 is a schematic diagram of a control module of the power control apparatus in an implementation;
FIG. 3 is a schematic diagram of a USB-C interface of a power control apparatus;
FIG. 4 is a schematic diagram of an external power interface of the power control apparatus;
FIG. 5 is a schematic diagram of a switching module of the power control apparatus;
FIG. 6 is a schematic diagram of a current regulator circuit of the power control apparatus;
FIG. 7 is a schematic diagram of a first voltage detection circuit of the power control apparatus;
FIG. 8 is a schematic diagram of a second voltage detection circuit of the power control apparatus;
FIG. 9 is a schematic diagram of a first discharge circuit of the power control apparatus;
FIG. 10 is a schematic diagram of a second discharge circuit of the power control apparatus in one embodiment;
FIG. 11 is a diagram of a computer USB-C interface peripheral device according to another embodiment.
Detailed Description
The present invention will be described in further detail with reference to the following detailed description and accompanying drawings. Wherein like elements in different embodiments are numbered with like associated elements. In the following description, numerous details are set forth in order to provide a better understanding of the present application. However, those skilled in the art will readily recognize that some of the features may be omitted or replaced with other elements, materials, methods in different instances. In some instances, certain operations related to the present application have not been shown or described in detail in order to avoid obscuring the core of the present application from excessive description, and it is not necessary for those skilled in the art to describe these operations in detail, so that they may be fully understood from the description in the specification and the general knowledge in the art.
Furthermore, the features, operations, or characteristics described in the specification may be combined in any suitable manner to form various embodiments. Also, the various steps or actions in the method descriptions may be transposed or transposed in order, as will be apparent to one of ordinary skill in the art. Thus, the various sequences in the specification and drawings are for the purpose of clearly describing certain embodiments only and are not intended to imply a required sequence unless otherwise indicated where a certain sequence must be followed.
The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings).
In the prior art, the power supply current limiting technology of the USB-C interface equipment adopts a single current value to limit current.
In the embodiment of the invention, whether the USB-C interface and the external power interface have power access is detected by the control module, the power accessed by the USB-C interface and the external power interface is switched by the switching module, and the current of the accessed power is adjusted by the power adjusting module according to the difference of the power input ends. Because the USB-C interface equipment can adjust the power supply current according to the difference of the power supply input ends, the USB-C interface equipment can automatically control the magnitude of the USB output current so as to reduce the risk of self-adaptive output current and the risk of overcurrent protection of a computer, thereby protecting the computer and improving the user experience.
Example one
Referring to fig. 1, a schematic structural diagram of a power control apparatus for a USB-C interface device in an implementation of the power control apparatus includes a control module 10, a USB-C interface 20, an external power interface 30, a switching module 40, and a power adjustment module 50. The USB-C interface 20 is used to interface with a computer USB-C interface. The external power interface 30 is used for inputting an external power. The switching module 40 is respectively connected to the USB-C interface 20 and the external power interface 30, and is configured to be respectively connected to a power supply of the USB-C interface of the computer and an external power supply through the USB-C interface 20 and the external power interface 30, and output the power supply of the USB-C interface of the computer or the external power supply. The power adjustment module 50 is connected to the switching module 40, and is configured to adjust and output electrical parameters of a power supply of the USB-C interface of the computer or an external power supply. The control module 10 is connected to the external power interface 30, the USB-C interface 30, the switching module 40 and the power adjusting module 50, respectively, and is configured to detect whether a power is connected to the USB-C interface 20 and the external power interface 30. When the computer USB-C interface 20 has a power input and the external power interface 30 has no power input, the control module 10 is further configured to control the switching module 40 to output the power of the computer USB-C interface to the power adjustment module 50, and control the power adjustment module 50 to adjust the power current of the computer USB-C interface to a first current value and output the first current value to the peripheral device of the computer USB-C interface. When the external power interface 30 has power input, the control module 10 is further configured to control the switching module 40 to output the external power to the power adjustment module 50, and control the power adjustment module 50 to adjust the current of the external power to a second current value and output the second current value to the computer USB-C interface peripheral device.
Please refer to fig. 2, which is a schematic structural diagram of a control module of a power control apparatus in an implementation, the control module includes a controller, and the controller includes a first control output terminal GPIO1 and a second control output terminal GPIO2. The first control output terminal GPIO1 and the second control output terminal GPIO2 are connected to the switching module 40, and are configured to send a high-low level signal to the switching module 40 through the first control output terminal GPIO1 and the second control output terminal GPIO2 by the controller 10, so as to control the switching module 40 to output a power supply or an external power supply of the USB-C interface of the computer. In one embodiment, when the first control output terminal GPIO1 is a high level signal and the second control output terminal GPIO2 is a low level signal, the controller 10 controls the switching module 40 to output a power supply of the USB-C interface of the computer; when the first control output terminal GPIO1 is a low level signal and the second control output terminal GPIO2 is a high level signal, the controller 10 controls the switching module 40 to output the external power.
The controller further comprises a first voltage detection signal input terminal VBUS _ DET1, a second voltage detection signal input terminal VBUS _ DET1, a first discharge signal output terminal GPIO4, a second discharge signal output terminal GPIO5 and/or a current regulation control output terminal GPIO3. In an embodiment, the controller further includes a control output terminal GPIO6, a control output terminal GPIO7, a control output terminal GPIO8, and a control output terminal GPIO9, which are used to connect the controllable USB interface HUB, the video conversion module, and/or the audio conversion module. In one embodiment, the controller further includes data communication terminals, such as a data communication terminal CC1_ DRP, a data communication terminal CC2_ DRP, a data communication terminal CC1_ URP, a data communication terminal CC2_ URP, a data communication terminal D +, and a data communication terminal D-. In one embodiment, the USB-C interface is a USB-C male, and the data communication terminal D +, the data communication terminal D-, the data communication terminal CC1_ DRP, and the data communication terminal CC2_ DRP of the control module 10 are connected to the data communication terminal corresponding to the USB-C interface 20 and the computer USB-C interface, so that the controller 10 communicates with the computer USB-C interface to coordinate that the power output terminal of the computer USB-C interface is the power output port B4 or the power output port A4. In one embodiment, the external power interface 30 is a USB-C connector, and the data communication terminal CC1_ URP and the data communication terminal CC2_ URP of the controller 10 are connected to corresponding interfaces of the external power to coordinate the output of the external power.
Please refer to fig. 3, which is a schematic structural diagram of a USB-C interface of a power control device in an implementation, wherein the USB-C interface is a USB-C male connector, and includes 24 output ports, i.e., output ports A1-a12 and output ports A1-a12, which are respectively connected to a USB-C interface of a computer. In one embodiment, the output terminal A2 and the output terminal A3 of the USB-C interface are respectively connected to capacitors C21 and C22, the output terminal B2 and the output terminal B3 of the USB-C interface are respectively connected to capacitors C23 and C24, the output terminal B5 of the USB-C interface is connected to the data communication terminal CC2_ DRP of the controller 10, and a resistor R21 is connected in series therebetween. And a capacitor C25 is arranged between the output end A5 of the USB-C interface and the ground. The resistor R23 and the resistor R22 are respectively connected between the output end A8 and the output end B8 of the USB-C interface and the ground in series. The output terminal B4 and the output terminal A4 of the USB-C interface are connected to an input terminal VBUS of the switching module 40, and are used for inputting the power supply of the USB-C interface of the computer.
Referring to fig. 4, a schematic diagram of an external power interface structure of an implemented power control device is shown, where the external power interface is a USB-C female connector and includes 24 output ports, i.e., output ports A1-a12 and output ports A1-a 12. In one embodiment, the output terminal A4, the output terminal A9, the output terminal B4, and the output terminal B9 of the external power interface are connected to another input terminal V-W of the switching module 40, and are used to input the external power V-W1, the external power V-W2, the external power V-W3, and/or the external power V-W4 to the switching module 40. In one embodiment, the output terminal A5 and the output terminal B5 of the external power interface are grounded respectively, and are connected in series with a capacitor C31 and a capacitor C32 respectively. The output end A1, the output end A12, the output end B1 and the output end B12 of the external power supply interface are grounded.
Referring to fig. 5, a schematic diagram of a switching module of a power control device in an implementation is shown, where the switching module includes a switching circuit. The switching circuit comprises a field effect transistor Q41, a field effect transistor Q42, a field effect transistor Q43, a field effect transistor Q44, a resistor R41, a resistor R42, a resistor R43 and a resistor R44. And the drain electrode of the field effect transistor Q41 is connected with the power supply access end of the USB-C interface and serves as the input end VBUS of the switching circuit. In one embodiment, the drain of the fet Q41 is connected to the output B4 and the output A4 of the USB-C interface, and is used for inputting the power supply of the USB-C interface of the computer. The source of the fet Q41 is connected to the source of the fet Q42, and serves as an output VBUS-M of the switching circuit, which is used to output the power supply of the USB-C interface of the computer or the external power supply to the power supply adjusting module 50. The gate of the field effect transistor Q41 is connected to one end of the resistor R41, the other end of the resistor R41 is connected to the source of the field effect transistor Q43 and one end of the resistor R42, and the other end of the resistor R42 is connected to the output terminal VBUS-M of the switching circuit. The drain of the field effect transistor Q42 is connected to the power input of the external power interface 30, and serves as the other input V-W of the switching circuit. In one embodiment, the drain of the field effect transistor Q42 is connected to the output terminal A4, the output terminal A9, the output terminal B4, and the output terminal B9 of the external power interface, and is used for inputting the external power. The gate of the field effect transistor Q42 is connected to one end of the resistor R44, the other end of the resistor R44 is connected to the source of the field effect transistor Q44 and one end of the resistor R43, and the other end of the resistor R43 is connected to the output terminal V-W of the switching circuit. The drain electrode of the field effect transistor Q43 is grounded, the gate electrode of the field effect transistor Q43 is connected with the first control output terminal GPIO1 of the controller and is connected with one end of the resistor R47, and the other end of the resistor R47 is grounded. The drain of the field effect transistor Q44 is grounded, the gate of the field effect transistor Q44 is connected with the second control output terminal GPIO2 of the controller and is connected with one end of the resistor R48, and the other end of the resistor R48 is grounded. In one embodiment, the switching circuit further includes a capacitor C43 and a capacitor C44, the capacitor C43 is connected in series between the resistor 42 and the gate of the fet Q41, and the capacitor C44 is connected in series between the resistor 43 and the gate of the fet Q42. In one embodiment, the fets Q41 and Q42 are P-channel MOS transistors, and the fets Q43 and Q44 are N-channel MOS transistors. In one embodiment, when the signal input to the switching circuit 40 from the first control output terminal GPIO1 of the controller is a high level signal, the output terminal VBUS-M of the switching circuit 40 outputs the power source of the USB-C interface of the computer. When the second control output terminal GPIO2 of the controller is inputted to the switching circuit 40 as a high level signal, the output terminal VBUS-M of the switching circuit 40 outputs an external power source. When the first control output terminal GPIO1 of the controller is at a high level, the power provided by the USB-C interface of the computer is turned on by the fet Q41 and connected to the output terminal VBUS-M of the switching circuit 40; when the second control output terminal GPIO2 of the controller is at a high level, the external power supply is connected to the output terminal VBUS-M of the switching circuit 40 through the field effect transistor Q42.
In one embodiment, fets Q41 and Q42 are SM4307PSK, and fets Q43 and Q44 are 2N7002.
In one embodiment, the power adjusting module includes a voltage adjusting circuit and a current adjusting circuit. The voltage adjusting circuit comprises an output end and an input end, wherein the input end of the voltage adjusting circuit is connected with the output end VBUS-M of the switching module, the output end of the voltage adjusting circuit is connected with the input end V-M of the current adjusting circuit, and the voltage adjusting circuit is used for adjusting the voltage of a power supply or an external power supply of a computer USB-C interface output by the switching module and outputting the power supply or the external power supply to the current adjusting circuit. The current adjusting circuit is connected with the voltage adjusting circuit and used for adjusting the current of the voltage-adjusted computer USB-C interface power supply or the external power supply and outputting the current to the computer USB-C interface peripheral equipment. In one embodiment, the voltage adjusting circuit adjusts the voltage of the power supply of the computer USB-C interface or the external power supply output by the switching module to 5V, 3.3V, 1.8V, and/or 1.2V and other voltages for output. In one embodiment, the power supply adjusted by the voltage adjusting circuit directly supplies power to the peripheral equipment of the USB-C interface.
The controller comprises a current regulation control output terminal GPIO3 connected with the current regulation circuit and used for sending high and low level signals to the current regulation circuit through the current regulation control output terminal GPIO3 so as to control the current regulation circuit to regulate the current of the regulated computer USB-C interface power supply or the external power supply.
Referring to fig. 6, a schematic structural diagram of a current adjusting circuit of a power control apparatus in an implementation is shown, in an embodiment, the current adjusting circuit includes a current control device U51, a resistor R14, a resistor 15, and a field effect transistor Q51. The current control device U51 includes an output terminal OUT, an input terminal IN, a ground terminal GND, a switch control terminal EN, and a current limit terminal ISET. The input end IN and the switch control end EN of the current control device U51 are connected with the output end of the voltage regulation circuit and used as the input end V-M of the current regulation circuit. The ground terminal GND of the current control device U51 is grounded. The output terminal OUT of the current control device U51 serves as the output terminal USB-M of the current regulation circuit. The current limiting terminal ISET of the current control device U51 is connected to one end of the resistor R52, and the other end of the resistor R52 is grounded. The current limiting end ISET of the current control device U51 is further connected to one end of the resistor R51, the other end of the resistor R51 is connected to the drain of the field effect transistor Q51, the gate of the field effect transistor Q51 is connected to the current regulation control output end, and the source of the field effect transistor Q51 is grounded. In one embodiment, the current regulation circuit further comprises a capacitor C51, a capacitor C52 and a capacitor C53, the capacitor C51 being connected in series between the output terminal USB-M of the current regulation circuit and ground, and the capacitor C52 and the capacitor C53 being connected in series between the input terminal V-M of the current regulation circuit and ground. In one embodiment, the current adjustment control output terminal GPIO3 of the controller outputs a high level signal or a low level signal, so that the resistor R51 and the resistor R52 are connected in parallel or not connected in parallel between the current limiting terminal ISET of the current control device U51 and ground, and further the resistance between the current limiting terminal ISET of the current control device U51 and ground is changed, and further the current of the power supply at the input terminal V-M is changed after passing through the current adjustment circuit, and then the current is output at the output terminal USB-M. In one embodiment, the fet Q51 is an N-channel MOS transistor. In one embodiment, current control device U51 is model SY6280.
In an embodiment, the control module 10 further includes a first voltage detection circuit and a second voltage detection circuit, and the first voltage detection circuit is connected to the first voltage detection signal input terminal VBUS _ DET1 of the controller and the power input terminal of the USB-C interface, and is configured to detect whether a power is connected to the USB-C interface. The second voltage detection circuit is connected with the second voltage detection signal input end VBUS _ DET2 and the power input end of the external power interface and is used for detecting whether the external power interface has power access.
Referring to fig. 7, a schematic structural diagram of a first voltage detection circuit of a power control device in an implementation is shown, the first voltage detection circuit includes a resistor R11 and a resistor R12, one end of the resistor R11 is connected to a power input terminal of a USB-C interface as a first voltage detection circuit input terminal VBUS, the other end of the resistor R11 is connected to a first voltage detection signal input terminal VBUS _ DET1 and one end of the resistor R12, and the other end of the resistor R12 is grounded.
Referring to fig. 8, a schematic structural diagram of a second voltage detection circuit of the power control apparatus in an implementation is shown, the second voltage detection circuit includes a resistor R13 and a resistor R14, one end of the resistor R13 is connected to a power input end of an external power interface as an input end V-W of the second voltage detection circuit, the other end of the resistor R13 is connected to a second voltage detection signal input end VBUS _ DET2 and one end of a resistor R12, and the other end of the resistor R12 is grounded.
In an embodiment, the control module 10 further includes a first discharging circuit and a second discharging circuit, where the first discharging circuit is connected to the first discharging signal output terminal GPIO4 and the power input terminal of the USB-C interface, and is configured to receive a discharging signal of the controller 10 through the first discharging signal output terminal GPIO4 to perform discharge protection on the power supply of the USB-C interface. The second discharging circuit is connected with the second discharging signal output end GPIO5 and the power supply access end of the external power supply interface and used for receiving a discharging signal of the controller through the second discharging signal output end GPIO5 to perform discharging protection on a power supply of the external power supply interface.
Referring to fig. 9, a schematic diagram of a first discharge circuit of a power control device in an implementation is shown, where the first discharge circuit includes a resistor R24, a resistor R25, and a field effect transistor Q21. One end of the resistor R24 is used as an input end VBUS of the first discharging circuit and connected with a power input end of the USB-C interface, the other end of the resistor R is connected with a drain electrode of the field-effect tube Q21, a source electrode of the field-effect tube Q21 is grounded, a grid electrode of the field-effect tube Q21 is connected with the first discharging signal output end GPIO4 and one end of the resistor R25, and the other end of the resistor R25 is grounded. In one embodiment, the fet Q21 is an N-channel MOS transistor, model 2N7002.
Referring to fig. 10, a schematic diagram of a second discharge circuit of the power control apparatus in an implementation is shown, where the second discharge circuit includes a resistor R31, a resistor R32, and a field effect transistor Q31. One end of the resistor R31 is used as an input end V-W of the second discharge circuit and connected with a power input end of an external power interface, the other end of the resistor R31 is connected with a drain electrode of the field-effect tube Q31, a source electrode of the field-effect tube Q31 is grounded, a grid electrode of the field-effect tube Q31 is connected with one end of the second discharge signal output end GPIO5 and the resistor R32, and the other end of the resistor R32 is grounded. In one embodiment, the fet Q31 is an N-channel MOS transistor, model 2N7002.
The embodiment of the present application further discloses a computer USB-C interface peripheral device, which includes the power control apparatus described in this embodiment, and the computer USB-C interface peripheral device further includes a USB interface HUB, a video conversion module and/or an audio conversion module, wherein the power of the USB interface HUB, the video conversion module and/or the audio conversion module is provided by the power adjustment module described in this embodiment.
The embodiment of the application also discloses a power supply control method for the USB-C interface equipment, which comprises the following steps:
the computer USB-C interface peripheral equipment detects whether a USB-C interface and an external power supply interface have power supply access, wherein the USB-C interface is connected with the computer USB-C interface, and the external power supply interface is connected with an external power supply.
When the computer USB-C interface is detected to have power input and the external power interface does not have power input, the power current of the computer USB-C interface is regulated to a first current value and then output to the computer USB-C interface peripheral equipment.
When the external power supply interface is detected to have power supply input, the external power supply current is regulated to a second current value and then is output to the computer USB-C interface peripheral equipment.
According to the power supply control device and method for the USB-C interface equipment of the embodiment, whether the USB-C interface and the external power supply interface have power supply access or not is detected through the control module, the power supply accessed by the USB-C interface and the external power supply interface is switched through the switching module, and then the current of the accessed power supply is adjusted through the power supply adjusting module according to different power supply input ends. Because the USB-C interface equipment can adjust the power supply current according to the difference of the power supply input ends, the USB-C interface equipment can automatically control the magnitude of the USB output current so as to reduce the risk of self-adaptive output current and improve the user experience.
Example two
Referring to fig. 11, a schematic diagram of a structure of a computer USB-C interface peripheral device in another embodiment is shown, the computer USB-C interface peripheral device includes a microprocessor 100, a USB-C male connector 200, a USB-C female connector 300, a voltage adjusting circuit 410, a current adjusting circuit 420, a discharging circuit 500, and a switching circuit 600. The microprocessor 100 is connected to the USB-C male connector 200, the USB-C female connector 300, the current adjusting circuit 420, the discharging circuit 500 and the switching circuit 600, respectively. The USB-C female head 300 is used for inputting an external power supply, the USB-C male head 200 is used for being connected with a computer USB-C interface 900, the switching circuit 600 is respectively connected with the USB-C female head 300 and the USB-C male head 200 and is used for being respectively connected with a power supply and an external power supply of the USB-C interface of the computer through the USB-C female head 300 and the USB-C male head 200 and outputting the power supply or the external power supply of the USB-C interface of the computer to the voltage adjusting circuit 410, and in one embodiment, the voltage range of the external power supply is between 5V and 20V. The voltage adjusting circuit 410 is used for adjusting the voltage of the power supply or the external power supply of the computer USB-C interface output by the switching circuit 600 and outputting the adjusted voltage to the current adjusting circuit 420, in an embodiment, the voltage adjusting circuit 410 adjusts the voltage of the power supply or the external power supply of the computer USB-C interface to 5V, 3.3V, 1.8V and 1.2V and outputs the adjusted voltage to the peripheral device of the computer USB-C interface for power supply. In one embodiment, the voltage regulator circuit 410 outputs the 5V regulated power to the current regulator circuit 420, and the current regulator circuit 420 regulates the current of the 5V power. In one embodiment, the microprocessor 100 detects whether the USB-C female connector 300 and the USB-C male connector 200 have power connection. When the male USB-C connector 200 has a power input and the female USB-C connector 300 has no power input, the microprocessor 100 is further configured to control the switching circuit 600 to output the power of the male USB-C connector 200 to the voltage adjusting circuit 410 for voltage adjustment, and control the current adjusting circuit 420 to adjust the current of the power of the USB-C interface of the computer after voltage adjustment to a first current value, and output the first current value to the peripheral device of the USB-C interface of the computer. When the USB-C female connector 300 has power input, the microprocessor 100 is further configured to control the switching circuit 600 to output the external power to the voltage adjusting circuit 410 for voltage adjustment, and control the current adjusting module 50 to adjust the current of the external power after voltage adjustment to a second current value, and then output the second current value to the computer USB-C interface peripheral device. In one embodiment, the computer USB-C interface peripheral further includes a discharging circuit 500, and the discharging circuit 500 is used for overvoltage protection of the computer USB-C interface peripheral under the control of the microprocessor 100, that is, for reducing or discharging the voltage of the power input by the USB-C female connector 300 and the USB-C male connector 200. In one embodiment, the computer USB-C interface peripheral device further comprises a HUB820 of USB interface and a USB interface 810. In one embodiment, the HUB820 of the USB interface is connected between the USB interface 810 and the male USB-C connector 200. In one embodiment, the 5V voltage of the USB interface 810 is provided by a power supply that is current regulated by a current regulation circuit. In an embodiment, the computer USB-C interface peripheral device further includes a video conversion module 710 and a video output interface 720, the video conversion module 710 is respectively connected to the USB-C male 200 and the microprocessor 100 for data communication, and the video output interface 720 is used for connecting the video conversion module 710 to a video display terminal. In one embodiment, the CC of the USB-C female connector 300 is connected to the CC of the computer USB-C interface 900 via the microprocessor 100 and the CC of the USB-C male connector 200 for supplying power in the reverse direction.
Those skilled in the art will appreciate that all or part of the functions of the various methods in the above embodiments may be implemented by hardware, or may be implemented by computer programs. When all or part of the functions of the above embodiments are implemented by a computer program, the program may be stored in a computer-readable storage medium, and the storage medium may include: a read only memory, a random access memory, a magnetic disk, an optical disk, a hard disk, etc., and the program is executed by a computer to realize the above functions. For example, the program may be stored in a memory of the device, and when the program in the memory is executed by the processor, all or part of the functions described above may be implemented. In addition, when all or part of the functions in the above embodiments are implemented by a computer program, the program may be stored in a storage medium such as a server, another computer, a magnetic disk, an optical disk, a flash disk, or a removable hard disk, and may be downloaded or copied to a memory of a local device, or may be version-updated in a system of the local device, and when the program in the memory is executed by a processor, all or part of the functions in the above embodiments may be implemented.
The present invention has been described in terms of specific examples, which are provided to aid understanding of the invention and are not intended to be limiting. For a person skilled in the art to which the invention pertains, several simple deductions, modifications or substitutions may be made according to the idea of the invention.

Claims (4)

1. A power control apparatus for a USB-C interface device, comprising:
the USB-C interface is used for being connected with the USB-C interface of the computer;
the external power supply interface is used for inputting an external power supply;
the switching module is respectively connected with the USB-C interface and the external power supply interface, is used for respectively connecting with a power supply of the computer USB-C interface and an external power supply through the USB-C interface and the external power supply interface, and outputs the power supply of the computer USB-C interface or the external power supply;
the power supply adjusting module is connected with the switching module and is used for adjusting and outputting the electrical parameters of the power supply of the USB-C interface of the computer or the external power supply;
the control module is respectively connected with the external power interface, the USB-C interface, the switching module and the power supply adjusting module and is used for detecting whether a power supply is connected to the USB-C interface and the external power interface or not;
when the computer USB-C interface has power input and the external power interface has no power input, the control module is further used for controlling the switching module to output the power of the computer USB-C interface to the power adjusting module, and controlling the power adjusting module to adjust the power current of the computer USB-C interface to a first current value and then output the first current value to the computer USB-C interface peripheral equipment;
when the external power supply interface has power supply input, the control module is further used for controlling the switching module to output the external power supply to the power supply adjusting module, and controlling the power supply adjusting module to adjust the current of the external power supply to a second current value and then output the second current value to the computer USB-C interface peripheral equipment;
the power supply adjusting module comprises a voltage adjusting circuit and a current adjusting circuit;
the voltage adjusting circuit is connected with the switching module and is used for adjusting and outputting the voltage of the power supply of the computer USB-C interface or the external power supply output by the switching module;
the current adjusting circuit is connected with the voltage adjusting circuit and is used for adjusting the current of the computer USB-C interface power supply or the external power supply after voltage adjustment and outputting the current to the computer USB-C interface peripheral equipment;
the control module comprises a controller; the controller comprises a first control output end and a second control output end;
the first control output end and the second control output end are connected with the switching module and used for the controller to send high and low level signals to the switching module through the first control output end and the second control output end so as to control the switching module to output the power supply of the USB-C interface of the computer or an external power supply;
the switching module comprises a switching circuit; the switching circuit comprises a field effect tube Q41, a field effect tube Q42, a field effect tube Q43, a field effect tube Q44, a resistor R41, a resistor R42, a resistor R43 and a resistor R44;
the drain electrode of the field effect tube Q41 is connected with the power supply access end of the USB-C interface; the source electrode of the field effect transistor Q41 is connected with the source electrode of the field effect transistor Q42 and serves as the output end of the switching circuit, and the power supply or the external power supply of the USB-C interface of the computer is output to the power supply adjusting module;
the grid of the field effect transistor Q41 is connected with one end of the resistor R41, the other end of the resistor R41 is connected with the source of the field effect transistor Q43 and one end of the resistor R42, and the other end of the resistor R42 is connected with the output end of the switching circuit;
the drain electrode of the field effect tube Q42 is connected with the power supply access end of the external power supply interface; the grid electrode of the field effect transistor Q42 is connected with one end of the resistor R44, the other end of the resistor R44 is connected with the source electrode of the field effect transistor Q44 and one end of the resistor R43, and the other end of the resistor R43 is connected with the output end of the switching circuit;
the drain electrode of the field effect transistor Q43 is grounded, the grid electrode of the field effect transistor Q43 is connected with the first control output end and is connected with one end of the resistor R47, and the other end of the resistor R47 is grounded;
the drain electrode of the field effect transistor Q44 is grounded, the grid electrode of the field effect transistor Q44 is connected with the second control output end and is connected with one end of the resistor R48, and the other end of the resistor R48 is grounded; the controller further comprises a first voltage detection signal input terminal and a second voltage detection signal input terminal;
the control module further comprises:
the first voltage detection circuit is connected with a first voltage detection signal input end and a power supply input end of the USB-C interface and is used for detecting whether the USB-C interface has power supply access or not;
the second voltage detection circuit is connected with a second voltage detection signal input end and a power supply input end of the external power supply interface and is used for detecting whether the external power supply interface has power supply access;
the first voltage detection circuit comprises a resistor R11 and a resistor R12; one end of the resistor R11 is connected with the power supply access end of the USB-C interface, the other end of the resistor R11 is connected with the first voltage detection signal input end and one end of the resistor R12, and the other end of the resistor R12 is grounded;
the second voltage detection circuit comprises a resistor R13 and a resistor R14; one end of the resistor R13 is connected with the power supply access end of the external power supply interface, the other end of the resistor R13 is connected with the second voltage detection signal input end and one end of the resistor R12, and the other end of the resistor R12 is grounded;
the controller also comprises a first discharge signal output end and a second discharge signal output end;
the control module further comprises:
the first discharge circuit is connected with a first discharge signal output end and the power supply input end of the USB-C interface and is used for receiving a discharge signal of the controller through the first discharge signal output end to perform discharge protection on the power supply of the USB-C interface;
the second discharging circuit is connected with a second discharging signal output end and a power supply access end of the external power supply interface and is used for receiving a discharging signal of the controller through the second discharging signal output end to perform discharging protection on a power supply of the external power supply interface;
the first discharge circuit comprises a resistor R24, a resistor R25 and a field effect transistor Q21;
one end of the resistor R24 is connected with the power input end of the USB-C interface, and the other end of the resistor R is connected with the drain electrode of the field effect transistor Q21;
the source electrode of the field effect transistor Q21 is grounded;
the grid of the field effect transistor Q21 is connected with the first discharge signal output end and one end of the resistor R25, and the other end of the resistor R25 is grounded;
the second discharge circuit comprises a resistor R31, a resistor R32 and a field effect transistor Q31;
one end of the resistor R31 is connected with the power input end of the external power interface, and the other end of the resistor R31 is connected with the drain electrode of the field effect transistor Q31;
the source electrode of the field effect transistor Q31 is grounded;
the grid electrode of the field effect transistor Q31 is connected with the second discharge signal output end and one end of the resistor R32, and the other end of the resistor R32 is grounded.
2. The power control device of claim 1, wherein the controller further comprises a current adjustment control output terminal, and the controller sends a high-low level signal to the current adjustment circuit through the current adjustment control output terminal to control the current adjustment circuit to adjust the regulated current of the computer USB-C interface or the external power supply;
the current adjusting circuit comprises a current control device U51, a resistor R14, a resistor 15 and a field effect transistor Q51;
the current control device U51 includes an output terminal OUT, an input terminal IN, a ground terminal GND, a switch control terminal EN, and a current limit terminal ISET;
an input end IN and a switch control end EN of the current control device U51 are connected with the output end of the voltage regulation circuit and used as the input end of the current regulation circuit;
the ground terminal GND of the current control device U51 is grounded;
the output end OUT of the current control device U51 is used as the output end of the current adjusting circuit;
the current limiting end ISET of the current control device U51 is connected with one end of the resistor R52, and the other end of the resistor R52 is grounded;
the current limiting end ISET of the current control device U51 is also connected with one end of a resistor R51, and the other end of the resistor R51 is connected with the drain electrode of the field effect transistor Q51;
the grid electrode of the field effect transistor Q51 is connected with the current regulation control output end;
the source of the field effect transistor Q51 is grounded.
3. A computer USB-C interface peripheral device comprising the power control apparatus according to any one of claims 1 to 2.
4. The device according to claim 3, further comprising a USB interface HUB, a video conversion module and/or an audio conversion module;
and the power supply of the USB interface HUB, the video conversion module and/or the audio conversion module is provided by the power supply adjusting module.
CN201910550010.5A 2019-06-24 2019-06-24 Power supply control device and method for USB-C interface equipment Active CN110442220B (en)

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