CN102999144B - USB feed circuit and device thereof and method of supplying power to - Google Patents
USB feed circuit and device thereof and method of supplying power to Download PDFInfo
- Publication number
- CN102999144B CN102999144B CN201210546052.XA CN201210546052A CN102999144B CN 102999144 B CN102999144 B CN 102999144B CN 201210546052 A CN201210546052 A CN 201210546052A CN 102999144 B CN102999144 B CN 102999144B
- Authority
- CN
- China
- Prior art keywords
- usb
- power
- circuit
- port
- host equipment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Power Sources (AREA)
Abstract
The invention provides a kind of USB feed circuit and device thereof and method of supplying power to, by being positioned at the first sensor on the straight-through feed circuit of a usb host equipment, second sensor, microprocessor, regulating circuit, second power stage port and reference power supply circuit, the power of the external periphery required by electronic product of described usb host equipment can be detected in time, and the power needed for the adjustment of detecting result and output, and when the power of the periphery required by electronic product accessed exceedes setting, timely cut-out power supply process, thus without the need to extra external power source, just can provide protection for standard USB device and non-USB device continued power.
Description
Technical field
The present invention relates to power-supply device technical field, particularly relate to a kind of to the USB feed circuit of the periphery electronic product powered operation of the equipment such as notebook computer and device thereof and method of supplying power to.
Background technology
When the periphery electronic product (being called for short USB peripheral hardware) of the mobile devices such as notebook computer, UMPC (the super mobile model PC of Ultra Mobile PC) uses, be generally by realizing the connection with computer in the USB socket of connected USB plug insertion computer.Usually, USB socket provides the power supply of 5V-500mA, but, due to the reason such as inner structure, heat dissipation design, often there is the defect of USB interface power supply capacity deficiency in current a lot of mobile device such as notebook, UMPC (the super mobile model PC of Ultra Mobile PC) on the market.The mobile device such as notebook computer, UMPC used more for a long time, because the reasons such as electric leakage, capacity reduction appear in the electrochemical capacitor of USB interface feed circuit, USB interface output power of power supply is reduced, the defect of USB interface power supply capacity deficiency is more obvious, make its periphery electronic product, especially the development of audio/video electronic product is very limited.
Generally, the periphery electronic product of the mobile device such as notebook computer, UMPC is in order to solve high-power problem, not only need to increase external power source in addition, so add cost of products but also make the more terseness affecting very much desktop of electric wire aobvious around notebook computer.
Therefore, a kind of USB feed circuit and device thereof and method of supplying power to is needed, to avoid above-mentioned defect.
Summary of the invention
The object of the present invention is to provide a kind of USB feed circuit and device thereof and method of supplying power to, can continue to provide power supply for the periphery electronic product to equipment such as notebook computers, simultaneously without the need to extra external power source.
For solving the problem, the invention provides a kind of USB feed circuit, comprising:
First sensor, input end connects the power input port of the straight-through feed circuit of a usb host equipment, and output terminal connects the input end of a microprocessor, and the electric current corresponding to the first power on feed circuit straight-through described in perception turns magnitude of voltage;
Second sensor, input end connects the power input port of the straight-through feed circuit of described usb host equipment, output terminal outputs to the power port of described usb host equipment and the input end of described microprocessor described in connecting, and turns magnitude of voltage for the electric current corresponding to perception second power;
Regulating circuit, input end connects the output terminal of described first sensor and the output terminal of described microprocessor, for adjusting output voltage according to the non-USB device required voltage being connected to described usb host equipment;
Second power stage port, according to the output voltage that described regulating circuit adjusts, for the non-USB device being connected to described usb host equipment provides the power stage being not more than the second power;
Reference power supply circuit, output terminal directly or indirectly connects the USB port of described main process equipment, input end connects the output terminal of described first sensor and the output terminal of microprocessor, provides the reference power supply under the first power for the USB device for being connected to described usb host equipment;
Described microprocessor, the non-USB device of connection whether is had for detecting the second power stage port, if do not connect non-USB device, then control described reference power supply circuit and reference power supply under the first power is provided for the USB device being connected to described usb host equipment, and first sensor detect be connected to described usb host equipment USB device power demand higher than the first power time, control described reference power supply circuit to stop externally exporting, the USB port simultaneously cutting off described usb host equipment exports; Non-USB device is connected if having, then control described regulating circuit and export the voltage needed for non-USB device connected, and when the power needed for described second sensor detecting to the non-USB device connected is higher than the second power, controls described regulating circuit and stop externally exporting.
Further, described first power is less than the second power.
Further, described first power is 10W, and described second power is 30W.
Further, when the output terminal of described reference power supply circuit connects the USB port of described main process equipment indirectly, described USB feed circuit also comprise: USB-HUB circuit, there is one and connect the input end of a USB port of described usb host equipment and the output terminal of the output terminal of the described reference power supply circuit of multiple connection, for a USB port of described usb host equipment is extended to multiple USB output port.
Further, between each described USB output port and the output terminal of described reference power supply circuit, be also provided with power sources in parallel device, obtain suitable voltage for the USB device connected for described USB output port.
Further, the number of described second power stage port is multiple.
Further, the number of described regulating circuit is less than or equal to the number of described second power stage port.
Further, described USB feed circuit also comprise: detection switch circuit, being arranged between described second power stage port and described microprocessor, making described microprocessor by whether having the non-USB device of connection to described detection switch circuit communication to detect the second power stage port.
The present invention also provides a kind of USB electric supply installation, comprises above-mentioned USB feed circuit.
The present invention also provides a kind of and uses above-mentioned USB feed circuit to carry out USB method of supplying power to, comprising:
The electric current straight-through feed circuit of a usb host equipment arranged corresponding to the first power on feed circuit straight-through described in perception turns the first sensor of magnitude of voltage, the input end of described first sensor connects the power input port of the straight-through feed circuit of described usb host equipment, and output terminal connects the input end of a microprocessor;
The straight-through feed circuit of described usb host equipment arrange the second sensor that the electric current be used for corresponding to perception second power turns magnitude of voltage, the input end of described second sensor connects the power input port of the straight-through feed circuit of described usb host equipment, outputs to the power port of described usb host equipment and the input end of described microprocessor described in output terminal connects;
Access a regulating circuit, for adjusting output voltage according to the non-USB device required voltage being connected to described usb host equipment, the input end of described regulating circuit connects the output terminal of described first sensor and the output terminal of described microprocessor;
Second power stage port is set at the output terminal of described regulating circuit, for the output voltage adjusted according to described regulating circuit, for the non-USB device being connected to described usb host equipment provides the power stage being not more than the second power;
Access a reference power supply circuit, reference power supply under first power is provided for the USB device for being connected to described usb host equipment, the output terminal of described reference power supply circuit directly or indirectly connects the USB port of described main process equipment, input end connects the output terminal of described first sensor and the output terminal of microprocessor, and output terminal connects the USB port of described main process equipment;
Whether the second power stage port detected by described microprocessor the non-USB device of connection;
If do not connect non-USB device, then control described reference power supply circuit and reference power supply under the first power is provided for the USB device being connected to described usb host equipment, and first sensor detect be connected to described usb host equipment USB device power demand higher than the first power time, control described reference power supply circuit to stop externally exporting, the USB port simultaneously cutting off described usb host equipment exports;
Non-USB device is connected if having, then control described regulating circuit and export the voltage needed for non-USB device connected, and when the power needed for described second sensor detecting to the non-USB device connected is higher than the second power, controls described regulating circuit and stop externally exporting.
Compared with prior art, USB feed circuit provided by the invention and device thereof and method of supplying power to, by being positioned at first sensor, the second sensor, microprocessor, regulating circuit, the second power stage port and the reference power supply circuit on the straight-through feed circuit of a usb host equipment, the power of the external periphery required by electronic product of described usb host equipment can be detected in time, and the power needed for the adjustment of detecting result and output, thus without the need to extra external power source, just can power for standard USB device and continue to provide high-power output for non-USB device; Further, when the power of the periphery required by electronic product accessed exceedes setting, power supply process is cut off in time, the periphery electronic product of protection usb host equipment and access thereof.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the USB feed circuit of the specific embodiment of the invention;
Fig. 2 is the structural representation of the USB electric supply installation of the specific embodiment of the invention;
Fig. 3 is the USB method of supplying power to process flow diagram of the specific embodiment of the invention.
Embodiment
For making object of the present invention, feature becomes apparent, and be further described, but the present invention can realize by different forms, should not think and just be confined to described embodiment below in conjunction with accompanying drawing to the specific embodiment of the present invention.
As shown in Figure 1, the invention provides a kind of USB feed circuit 1, comprising: first sensor 14, second sensor 15, microprocessor (MCU) 16, regulating circuit 17, second power stage port 18, reference power supply circuit 11, USB-HUB circuit 12 and the USB output port expanded thereof.
Wherein, the input end of first sensor 14 connects the power input port 20 of the straight-through feed circuit of a usb host equipment, output terminal connects the input end of microprocessor 16, and the electric current corresponding to the first power on feed circuit straight-through described in perception turns magnitude of voltage;
Second sensor 15 input end connects the power input port 20 of the straight-through feed circuit of described usb host equipment, output terminal outputs to the power port 21 of described usb host equipment and the input end of described microprocessor 16 described in connecting, and turns magnitude of voltage for the electric current corresponding to perception second power;
Regulating circuit 17 input end connects the output terminal of described first sensor 14 and the output terminal of described microprocessor 16, for adjusting output voltage according to the non-USB device required voltage being connected to described usb host equipment;
The output voltage that second power stage port 18 adjusts according to described regulating circuit 17, for the non-USB device being connected to described usb host equipment provides the power stage being not more than the second power;
Reference power supply circuit 11 output terminal directly or indirectly connects the USB port 22 of described main process equipment, input end connects the output terminal of described first sensor 14 and the output terminal of microprocessor 16, provides the reference power supply under the first power for the USB device for being connected to described usb host equipment;
Whether described microprocessor 16 has the non-USB device of connection for detecting the second power stage port 18, if do not connect non-USB device, then control described reference power supply circuit 11 and reference power supply under first power is provided for the USB device being connected to described usb host equipment, and first sensor 14 detect be connected to described usb host equipment USB device power demand higher than the first power time, control described reference power supply circuit 11 and stop external output, the USB port 22 simultaneously cutting off described usb host equipment exports; Non-USB device is connected if having, then control described regulating circuit 17 and export the voltage needed for non-USB device connected, and when the power needed for the non-USB device that described second sensor 15 detects connection is higher than the second power, controls described regulating circuit 17 and stop external output.
Under normal circumstances, described first power is less than the second power, and such as, described first power is 10W, and described second power is 30W, and in this case, the standard mains voltage that reference power supply circuit provides is 5V.
In the present embodiment, described USB feed circuit also comprise the USB output port of USB-HUB circuit 12 and expansion thereof, indirectly connect the USB port 22 of described main process equipment with the output terminal realizing described reference power supply circuit 11; Described USB-HUB circuit 12 has one and connects the input end of a USB port 22 of described usb host equipment and the output terminal of the output terminal of the described reference power supply circuit 11 of multiple connection, for a USB port 22 of described usb host equipment is extended to multiple USB output port.USB-HUB circuit in figure is 1 drag 3 types, 3 USB output ports 13a, 13b, 13c are extended to by USB port 22, and 3 USB output ports 13a, 13b, 13c are also provided with a power sources in parallel device (as shown in 19a, 19b, the 19c in Fig. 1) on the circuit be connected with the output terminal of described reference power supply circuit 11 separately, obtain suitable voltage for the USB device for self connecting.
In other embodiments of the invention, in order to realize the access of multiple non-USB device simultaneously, the number of the second power stage port can arrange multiple, these the second power stage ports can all be connected on a regulating circuit, also can connect each self-corresponding regulating circuit separately by man-to-man mode.Therefore, the number of described regulating circuit is generally less than the number equaling described second power stage port.
In the present embodiment, described USB feed circuit also comprise: detection switch circuit (not shown), be arranged at described second power stage port 18 and (being generally the switching signal output pin that the control end of detection switch circuit is connected microprocessor) between described microprocessor 16, make described microprocessor 16 by whether having to described detection switch circuit communication connect non-USB device (namely whether having plug to insert) to detect the second power stage port 18.
It should be noted that, the usb host equipment of indication of the present invention can be the mobile devices such as notebook computer, panel computer, UMPC (the super mobile model PC of Ultra Mobile PC), non-USB device is the powerful device such as audio/video electronic product, printer, scanner mainly, USB device refers to USB flash disk, portable hard drive, the low-power equipments such as storage card and following emerging USB device.
USB feed circuit of the present invention can be directly embedded in usb host equipment, or are embedded in the periphery electronic product of usb host equipment, to make the desktop around usb host equipment succinct.But universal in order to improve, reduce the cost of products of usb host equipment and periphery electronic product thereof, these USB feed circuit can be assembled into separately an autonomous device.
Therefore, as shown in Figure 2, the present invention also provides a kind of USB electric supply installation 30, connects with the power supply of usb host equipment, comprises above-mentioned USB feed circuit 1.In the present embodiment, the USB-HUB circuit of USB feed circuit 1 drags four, and the second power stage port is 3, therefore provides 4 for accessing USB port and 3 jacks for the non-USB device of grafting of USB device for extraneous.
In sum, USB feed circuit provided by the invention and device thereof, by being positioned at the first sensor on the straight-through feed circuit of a usb host equipment, second sensor, microprocessor, regulating circuit, second power stage port and reference power supply circuit, the power of the external periphery required by electronic product of described usb host equipment can be detected in time, and the power needed for the adjustment of detecting result and output, and when the power of the periphery required by electronic product accessed exceedes setting, timely cut-out power supply process, thus without the need to extra external power source, just can provide protection for standard USB device and non-USB device continued power.
As shown in Figure 3, the present invention also provides a kind of and uses above-mentioned USB feed circuit to carry out USB method of supplying power to, comprising:
S31, the electric current straight-through feed circuit of a usb host equipment arranged corresponding to the first power on feed circuit straight-through described in perception turns the first sensor of magnitude of voltage, the input end of described first sensor connects the power input port of the straight-through feed circuit of described usb host equipment, and output terminal connects the input end of a microprocessor;
S32, the straight-through feed circuit of described usb host equipment arrange the second sensor that the electric current be used for corresponding to perception second power turns magnitude of voltage, the input end of described second sensor connects the power input port of the straight-through feed circuit of described usb host equipment, outputs to the power port of described usb host equipment and the input end of described microprocessor described in output terminal connects;
S33, accesses a regulating circuit, and for adjusting output voltage according to the non-USB device required voltage being connected to described usb host equipment, the input end of described regulating circuit connects the output terminal of described first sensor and the output terminal of described microprocessor;
S34, arranges the second power stage port at the output terminal of described regulating circuit, for the output voltage adjusted according to described regulating circuit, for the non-USB device being connected to described usb host equipment provides the power stage being not more than the second power;
S36, access a reference power supply circuit, reference power supply under first power is provided for the USB device for being connected to described usb host equipment, the output terminal of described reference power supply circuit directly or indirectly connects the USB port of described main process equipment, input end connects the output terminal of described first sensor and the output terminal of microprocessor, and output terminal connects the USB port of described main process equipment;
S41, whether the second power stage port detected by described microprocessor the non-USB device of connection;
S42, if do not connect non-USB device, then controls described reference power supply circuit and provides reference power supply under the first power for the USB device being connected to described usb host equipment, and perform step S44 and S45 further;
S43, connects non-USB device if having, then control described regulating circuit and export the voltage needed for non-USB device connected, and perform step S46 and S47;
S44, whether first sensor detecting is connected to the USB device power demand of described usb host equipment higher than the first power; If not, continue to perform step S42, described reference power supply circuit continues to provide the reference power supply under the first power; If so, then step S45 is performed;
S45, reference power supply circuit described in Microprocessor S3C44B0X stops externally exporting, and cuts off described usb host equipment simultaneously;
S46, whether the power needed for non-USB device that the second sensor detecting connects is higher than the second power, and if not, continue to perform step S43, described regulating circuit continues to export the voltage needed for non-USB device connected; If so, step S47 is performed;
S47, regulating circuit described in Microprocessor S3C44B0X stops externally exporting.
In above-mentioned steps, S31 to S35 can regard the step as usb host equipment laying USB feed circuit such as notebook computers as, and step S41 to step S47 can regard the process that the USB feed circuit laid are powered as.Use in the process of USB feed circuit of the present invention at some, just connect before each parts of USB feed circuit self, the execution of step S31 to S35 can be omitted, directly the input end of first sensor is connected the power input port of the straight-through feed circuit of described usb host equipment, the input end of the second sensor is connected the power input port of the straight-through feed circuit of described usb host equipment, the power port of described usb host equipment is outputted to described in output terminal connects, the process that remaining USB feed circuit is powered automatically is processed by microprocessor and completes.
USB method of supplying power to disclosed by the invention, by arranging first sensor on the straight-through feed circuit of a usb host equipment, second sensor, microprocessor, regulating circuit, second power stage port and reference power supply circuit, the power of the external periphery required by electronic product of described usb host equipment can be detected in time, and the power needed for the adjustment of detecting result and output, and when the power of the periphery required by electronic product accessed exceedes setting, timely cut-out power supply process, thus without the need to extra external power source, just can provide protection for standard USB device and non-USB device continued power.
Below using notebook computer as usb host equipment, can circumscribed USB equipment and audio frequency and video electronic product (non-USB device) be example, describe principle of work or the using method of USB feed circuit of the present invention in detail, with easier, the clearer beneficial effect understanding the method for supplying power to using USB feed circuit of the present invention.
The straight-through feed circuit of notebook computer can be regarded as from this laptop adapter output terminal (i.e. power input port the straight-through feed circuit of usb host equipment) to the power port being input to notebook computer CPU(and outputting to described usb host equipment) one section of circuit; First sensor is 10W sensor, can turn magnitude of voltage by the electric current corresponding to perception 10W power; Second sensor is 30W sensor, can turn magnitude of voltage by the electric current corresponding to perception 30W power; Second power stage port is 30W power stage port, can provide the high-power output of 30W for the non-USB device of notebook computer periphery; Regulating circuit is the adjustable DC/DC circuit of 30W voltage, can adjust output voltage according to the non-USB device required voltage of notebook computer periphery; Microprocessor (MCU), inner integrated system program carries out various state detecting or operation; Reference power supply circuit is 10W DC/DC circuit, can provide the 5V reference power supply of 10W for USB device; USB-HUB circuit is 1 drag 3USB-HUB circuit, carries out conventional USB HUB and transfers, the standard USB port of notebook computer can be extended to 3 high-power USB output ports here.
After the power supply adaptor of this notebook computer is connected, microprocessor inserts detection switch signal by sending power supply to 30W power stage port, detects 30W power stage port and is not inserted by plug.
When 30W power stage port is not inserted by plug, microprocessor can detect this state, and now system default is USB-HUB large power supply output mode, thus provides condition of work can to the USB device of below 10W; Whether the power needed for USB device that 10W sensor detecting inserts is more than 10W; when the USB device power demand inserted is more than 10W; microprocessor can by 10W sensor detecting to super setting; now microprocessor sends signal of stopping power supply and is given to 10W DC/DC circuit; 10WDC/DC circuit is made to stop externally exporting; and cut off the 5V USB power source that notebook computer itself carries and export (standard USB port namely cutting off laptop exports), to play a protective role.
When 30W power stage port has plug to insert, microprocessor can detect the change of this state, and now system automatically switches to 30W power mode output, for the non-USB powerful device inserted provides condition of work; Whether the power needed for USB device that 30W sensor detecting inserts is more than 30W; when the non-USB powerful device of outside is more than 30W; microprocessor can by 30W sensor detecting to super setting; now microprocessor sends signal of stopping power supply and is given to 30W DC/DC circuit; 30W DC/DC circuit is made to stop externally exporting, to play a protective role.
In sum, USB feed circuit provided by the invention and device thereof and method of supplying power to, by being positioned at the first sensor on the straight-through feed circuit of a usb host equipment, second sensor, microprocessor, regulating circuit, second power stage port and reference power supply circuit, the power of the external periphery required by electronic product of described usb host equipment can be detected in time, and the power needed for the adjustment of detecting result and output, and when the power of the periphery required by electronic product accessed exceedes setting, timely cut-out power supply process, thus without the need to extra external power source, just can provide protection for standard USB device and non-USB device continued power.
Obviously, those skilled in the art can carry out various change and modification to invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (10)
1. USB feed circuit, is characterized in that, comprising:
First sensor, input end connects the power input port of the straight-through feed circuit of a usb host equipment, and output terminal connects the input end of a microprocessor, and the electric current corresponding to the first power on feed circuit straight-through described in perception turns magnitude of voltage;
Second sensor, input end connects the power input port of the straight-through feed circuit of described usb host equipment, output terminal connection outputs to the power port of described usb host equipment and the input end of described microprocessor, turns magnitude of voltage for the electric current corresponding to perception second power;
Regulating circuit, input end connects the output terminal of described first sensor and the output terminal of described microprocessor, for adjusting output voltage according to the non-USB device required voltage being connected to described usb host equipment;
Second power stage port, according to the output voltage that described regulating circuit adjusts, for the non-USB device being connected to described usb host equipment provides the power stage being not more than the second power;
Reference power supply circuit, output terminal directly or indirectly connects the USB port of described main process equipment; Input end connects the output terminal of described first sensor and the output terminal of microprocessor, provides the reference power supply under the first power for the USB device for being connected to described usb host equipment;
Described microprocessor, the non-USB device of connection whether is had for detecting the second power stage port, if do not connect non-USB device, then control described reference power supply circuit and reference power supply under the first power is provided for the USB device being connected to described usb host equipment, and first sensor detect be connected to described usb host equipment USB device power demand higher than the first power time, control described reference power supply circuit to stop externally exporting, the USB port simultaneously cutting off described usb host equipment exports; Non-USB device is connected if having, then control described regulating circuit and export the voltage needed for non-USB device connected, and when the power needed for described second sensor detecting to the non-USB device connected is higher than the second power, controls described regulating circuit and stop externally exporting.
2. USB feed circuit as claimed in claim 1, it is characterized in that, described first power is less than the second power.
3. USB feed circuit as claimed in claim 2, it is characterized in that, described first power is 10W, and described second power is 30W.
4. USB feed circuit as claimed in claim 1, it is characterized in that, when the output terminal of described reference power supply circuit connects the USB port of described main process equipment indirectly, described USB feed circuit also comprise: USB-HUB circuit, there is one and connect the input end of a USB port of described usb host equipment and the output terminal of the output terminal of the described reference power supply circuit of multiple connection, for a USB port of described usb host equipment is extended to multiple USB output port.
5. USB feed circuit as claimed in claim 4, is characterized in that, be also provided with power sources in parallel device between each described USB output port and the output terminal of described reference power supply circuit, obtain suitable voltage for the USB device connected for described USB output port.
6. USB feed circuit as claimed in claim 1, it is characterized in that, the number of described second power stage port is multiple.
7. USB feed circuit as claimed in claim 6, it is characterized in that, the number of described regulating circuit is less than or equal to the number of described second power stage port.
8. USB feed circuit as claimed in claim 1, it is characterized in that, also comprise: detection switch circuit, being arranged between described second power stage port and described microprocessor, making described microprocessor by whether having the non-USB device of connection to described detection switch circuit communication to detect the second power stage port.
9. a USB electric supply installation, is characterized in that, described USB electric supply installation connects the power supply of a usb host equipment, and comprises the USB feed circuit according to any one of claim 1 to 8.
10. use the USB feed circuit according to any one of claim 1 to 8 to carry out a USB method of supplying power to, it is characterized in that, comprising:
The electric current straight-through feed circuit of a usb host equipment arranged corresponding to the first power on feed circuit straight-through described in perception turns the first sensor of magnitude of voltage, the input end of described first sensor connects the power input port of the straight-through feed circuit of described usb host equipment, and output terminal connects the input end of a microprocessor;
The straight-through feed circuit of described usb host equipment arrange the second sensor that the electric current be used for corresponding to perception second power turns magnitude of voltage, the input end of described second sensor connects the power input port of the straight-through feed circuit of described usb host equipment, and output terminal connection outputs to the power port of described usb host equipment and the input end of described microprocessor;
Access a regulating circuit, for adjusting output voltage according to the non-USB device required voltage being connected to described usb host equipment, the input end of described regulating circuit connects the output terminal of described first sensor and the output terminal of described microprocessor;
Second power stage port is set at the output terminal of described regulating circuit, for the output voltage adjusted according to described regulating circuit, for the non-USB device being connected to described usb host equipment provides the power stage being not more than the second power;
Access a reference power supply circuit, reference power supply under first power is provided for the USB device for being connected to described usb host equipment, the output terminal of described reference power supply circuit directly or indirectly connects the USB port of described main process equipment, input end connects the output terminal of described first sensor and the output terminal of microprocessor, and output terminal connects the USB port of described main process equipment;
Whether the second power stage port detected by described microprocessor the non-USB device of connection;
If do not connect non-USB device, then control described reference power supply circuit and reference power supply under the first power is provided for the USB device being connected to described usb host equipment, and first sensor detect be connected to described usb host equipment USB device power demand higher than the first power time, control described reference power supply circuit to stop externally exporting, the USB port simultaneously cutting off described usb host equipment exports;
Non-USB device is connected if having, then control described regulating circuit and export the voltage needed for non-USB device connected, and when the power needed for described second sensor detecting to the non-USB device connected is higher than the second power, controls described regulating circuit and stop externally exporting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210546052.XA CN102999144B (en) | 2012-12-14 | 2012-12-14 | USB feed circuit and device thereof and method of supplying power to |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210546052.XA CN102999144B (en) | 2012-12-14 | 2012-12-14 | USB feed circuit and device thereof and method of supplying power to |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102999144A CN102999144A (en) | 2013-03-27 |
| CN102999144B true CN102999144B (en) | 2015-07-29 |
Family
ID=47927804
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210546052.XA Active CN102999144B (en) | 2012-12-14 | 2012-12-14 | USB feed circuit and device thereof and method of supplying power to |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102999144B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105045754A (en) * | 2015-08-10 | 2015-11-11 | 安徽普为智能科技有限责任公司 | Serial bus based intelligent connection charging method |
| CN105045755A (en) * | 2015-08-10 | 2015-11-11 | 安徽普为智能科技有限责任公司 | Intelligent connection system for client |
| CN106059013B (en) * | 2016-08-01 | 2020-09-25 | 联想(北京)有限公司 | Method for improving battery endurance and electronic equipment |
| CN106201807B (en) * | 2016-09-12 | 2022-12-06 | 陈斌 | Multifunctional electronic software and hardware debugging equipment |
| CN108509010B (en) * | 2018-03-21 | 2024-04-23 | 联想(北京)有限公司 | Power supply method and power supply system |
| CN110770997A (en) * | 2018-08-16 | 2020-02-07 | 深圳市大疆创新科技有限公司 | Power supply method and equipment |
| CN113687552A (en) * | 2020-05-19 | 2021-11-23 | 联合微电子中心有限责任公司 | Phase-shift control circuit |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101593990A (en) * | 2008-02-13 | 2009-12-02 | 技领半导体(上海)有限公司 | Realize method, device and the integrated circuit of the intellectual power management of USB port |
| CN102822812A (en) * | 2010-02-22 | 2012-12-12 | 苹果公司 | Methods and apparatus for intelligently providing power to a device |
| CN202948395U (en) * | 2012-12-14 | 2013-05-22 | 青岛歌尔声学科技有限公司 | USB (Universal Serial Bus) power supply circuit and device thereof |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7436950B2 (en) * | 2003-07-02 | 2008-10-14 | Hewlett-Packard Development Company, L.P. | Apparatus and method for real-time power distribution management |
| US7877618B2 (en) * | 2007-08-29 | 2011-01-25 | Dell Products L.P. | Systems and methods for power management |
| JP2009094623A (en) * | 2007-10-04 | 2009-04-30 | Konica Minolta Business Technologies Inc | Image forming apparatus and control method executed in image forming apparatus |
| US8266456B2 (en) * | 2007-10-15 | 2012-09-11 | Apple Inc. | Supplying remaining available current to port in excess of bus standard limit |
-
2012
- 2012-12-14 CN CN201210546052.XA patent/CN102999144B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101593990A (en) * | 2008-02-13 | 2009-12-02 | 技领半导体(上海)有限公司 | Realize method, device and the integrated circuit of the intellectual power management of USB port |
| CN102822812A (en) * | 2010-02-22 | 2012-12-12 | 苹果公司 | Methods and apparatus for intelligently providing power to a device |
| CN202948395U (en) * | 2012-12-14 | 2013-05-22 | 青岛歌尔声学科技有限公司 | USB (Universal Serial Bus) power supply circuit and device thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102999144A (en) | 2013-03-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102999144B (en) | USB feed circuit and device thereof and method of supplying power to | |
| US9606597B2 (en) | Intermediate electronic device, method for operating the intermediate electronic device and electronic system | |
| US10042801B2 (en) | System for detecting universal serial bus (USB) device and method thereof | |
| US8502414B2 (en) | Power saving apparatus and power saving method thereof | |
| EP2545631B1 (en) | External power source voltage drop compensation for portable devices | |
| TWI494863B (en) | Dual-interface card reader module | |
| KR101623756B1 (en) | A method for interrupting power supply in an apparatus for interrupting power supply utilizing the voltage supplied to the system memory | |
| US11119550B2 (en) | USB device and operation method thereof | |
| US20170220087A1 (en) | Information Handling System Multiple Port Power Source Management | |
| CN203014451U (en) | USB charger | |
| CN101826805A (en) | Control circuit of switch power supply | |
| US20200201416A1 (en) | Usb adapting circuit | |
| CN202948395U (en) | USB (Universal Serial Bus) power supply circuit and device thereof | |
| US20170220088A1 (en) | Information Handling System Port Power Management and Cable Detect | |
| CN103777733B (en) | The method of supplying power to of computer apparatus and general connectivity port module | |
| TWI451235B (en) | Connecting module for coupling output ends of a host device to an external storage device and coupling method thereof | |
| CN102611078A (en) | Portable electronic device and system efficiency adjusting method thereof | |
| WO2020233445A1 (en) | Power adapter and charging method | |
| CN201667067U (en) | USB interface | |
| KR101661392B1 (en) | Standby power cut-off charging devices and control mothod for Smart devices | |
| KR101773489B1 (en) | Power supply apparatus and display apparatus including the same | |
| CN209590835U (en) | A kind of power-supply system and electronic equipment | |
| CN205353872U (en) | Integration computer mainboard with solely show | |
| CN206819284U (en) | Processor power management system and computer equipment | |
| CN102866764B (en) | The method for managing power supply of terminal device and internal storage location thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |