CN102999144A - USB (Universal Serial Bus) power supply circuit and device as well as power supply method - Google Patents
USB (Universal Serial Bus) power supply circuit and device as well as power supply method Download PDFInfo
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- CN102999144A CN102999144A CN201210546052XA CN201210546052A CN102999144A CN 102999144 A CN102999144 A CN 102999144A CN 201210546052X A CN201210546052X A CN 201210546052XA CN 201210546052 A CN201210546052 A CN 201210546052A CN 102999144 A CN102999144 A CN 102999144A
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Abstract
The invention provides a USB (Universal Serial Bus) power supply circuit and device as well as a power supply method. Power needed by a peripheral electronic product which is externally connected with USB host equipment can be detected in time through a first sensor, a second sensor, a microprocessor, a voltage adjusting circuit, a second power output port and a standard power supply circuit, which are located on the shoot-through power supply circuit of the USB host equipment; the needed power is adjusted and output according to a detected result; and when the accessed power needed by the peripheral electronic product exceeds a specified value, a power supply process is switched off in time, so that an extra external power supply is not needed, and power can be continuously supplied to standard USB equipment and non-standard USB equipment which are also protected.
Description
Technical field
The present invention relates to the power-supply device technical field, relate in particular to a kind of USB feed circuit and device and method of supplying power to of the peripheral electronic product powered operation to equipment such as notebook computers.
Background technology
When the peripheral electronic product of the mobile devices such as notebook computer, UMPC (the super mobile model PC of Ultra Mobile PC) (be called for short USB peripheral hardware) uses, generally be to insert by connected USB plug to realize in the USB socket of computer and being connected of computer.Usually, USB socket provides the power supply of 5V-500mA, but owing to reasons such as inner structure, heat dissipation design, often there is the defective of USB interface power supply capacity deficiency in mobile devices such as a lot of notebooks, UMPC (the super mobile model PC of Ultra Mobile PC) on the market at present.The mobile devices such as the notebook computer that has used more for a long time, UMPC, the reasons such as electric leakage, volume lowering appear owing to the electrochemical capacitor of USB interface feed circuit, the USB interface output power of power supply is reduced, the defective of USB interface power supply capacity deficiency is more obvious, so that its peripheral electronic product, the especially development of audio/video electronic product are very limited.
Generally speaking, the peripheral electronic product of the mobile device such as notebook computer, UMPC is in order to solve high-power problem, need to increase in addition external power source, so namely increased cost of products again so that the more terseness that affects very much desktop of electric wire that shows around the notebook computer.
Therefore, need a kind of USB feed circuit and device and method of supplying power to, to avoid defects.
Summary of the invention
The object of the present invention is to provide a kind of USB feed circuit and device and method of supplying power to, can continue to provide power supply for the peripheral electronic product to equipment such as notebook computers, need not simultaneously extra external power source.
For addressing the above problem, the invention provides a kind of USB feed circuit, comprising:
First sensor, input end connect the power input mouth of the straight-through feed circuit of a usb host equipment, and output terminal connects the input end of a microprocessor, and the corresponding electric current of the first power that is used on the described straight-through feed circuit of perception turns magnitude of voltage;
The second sensor, input end connects the power input mouth of the straight-through feed circuit of described usb host equipment, output terminal connects the described power port of described usb host equipment and the input end of described microprocessor of outputing to, and is used for the corresponding electric current of perception the second power and turns magnitude of voltage;
Regulating circuit, input end connect the output terminal of described first sensor and the output terminal of described microprocessor, are used for adjusting output voltage according to the non-USB device required voltage that is connected to described usb host equipment;
The second power stage port is according to the output voltage of described regulating circuit adjustment, for the non-USB device that is connected to described usb host equipment provides the power stage that is not more than the second power;
The 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, is used to the USB device that is connected to described usb host equipment that reference power supply under the first power is provided;
Described microprocessor, be used for detecting the second power stage port whether the non-USB device of connection is arranged, if do not connect non-USB device, then control described reference power supply circuit and provide reference power supply under the first power for the USB device that is connected to described usb host equipment, and detect the USB device power demand that is connected to described usb host equipment when being higher than the first power at first sensor, control described reference power supply circuit and stop external output, cut off simultaneously the USB port output of described usb host equipment; If the non-USB device of connection is arranged, then control the required voltage of non-USB device that described regulating circuit output connects, and when described the second sensor detecting is higher than the second power to the required power of non-USB device that connects, controls described regulating circuit and stop external output.
Further, described the first power is less than the second power.
Further, described the first power is 10W, and described the second power is 30W.
Further, during the USB port of the described main process equipment of output terminal indirect joint of described reference power supply circuit, described USB feed circuit also comprise: the USB-HUB circuit, input end with a USB port that connects described usb host equipment with are connected the output terminal of output terminal of the described reference power supply circuit of connection, be used for a USB port of described usb host equipment is extended to a plurality of USB output ports.
Further, also be provided with the power supply parallel device between the output terminal of each described USB output port and described reference power supply circuit, the USB device that is used to described USB output port to connect obtains suitable voltage.
Further, the number of described the second power stage port is a plurality of.
Further, the number of described regulating circuit is less than or equal to the number of described the second power stage port.
Further, described USB feed circuit also comprise: the detection switch circuit, be arranged between described the second power stage port and the described microprocessor, so that whether described microprocessor is by 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 the USB method of supplying power to, comprising:
Be provided for the first sensor that the corresponding electric current of the first power on the described straight-through feed circuit of perception turns magnitude of voltage at the straight-through feed circuit of a usb host equipment, the input end of described first sensor connects the power input mouth of the straight-through feed circuit of described usb host equipment, and output terminal connects the input end of a microprocessor;
Straight-through feed circuit at described usb host equipment are provided for the second sensor that the corresponding electric current of perception the second power turns magnitude of voltage, the input end of described the second sensor connects the power input mouth of the straight-through feed circuit of described usb host equipment, and output terminal connects the described power port of described usb host equipment and the input end of described microprocessor of outputing to;
Access a regulating circuit, be used for adjusting output voltage according to the non-USB device required voltage that is 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;
Output terminal at described regulating circuit arranges the second power stage port, is used for the output voltage according to described regulating circuit adjustment, for the non-USB device that is connected to described usb host equipment provides the power stage that is not more than the second power;
Access a reference power supply circuit, be used to the USB device that is connected to described usb host equipment that reference power supply under the first power is provided, 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 described microprocessor is detected the second power stage port the non-USB device of connection;
If do not connect non-USB device, then control described reference power supply circuit and provide reference power supply under the first power for the USB device that is connected to described usb host equipment, and detect the USB device power demand that is connected to described usb host equipment when being higher than the first power at first sensor, control described reference power supply circuit and stop external output, cut off simultaneously the USB port output of described usb host equipment;
If the non-USB device of connection is arranged, then control the required voltage of non-USB device that described regulating circuit output connects, and when described the second sensor detecting is higher than the second power to the required power of non-USB device that connects, controls described regulating circuit and stop external output.
Compared with prior art, USB feed circuit provided by the invention and device and method of supplying power to, by the first sensor on the straight-through feed circuit that are positioned at a usb host equipment, the second sensor, microprocessor, regulating circuit, the second power stage port and reference power supply circuit, can in time detect the power of the external peripheral required by electronic product of described usb host equipment, and according to detecting as a result adjustment and exporting required power, thereby need not extra external power source, just can continue to provide high-power output for standard USB device power supply and for non-USB device; Further, when the power of the peripheral required by electronic product that accesses surpasses setting, in time cut off power supply process, the peripheral electronic product of protection usb host equipment and access thereof.
Description of drawings
Fig. 1 is the synoptic 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 purpose of the present invention, feature are become apparent, below in conjunction with accompanying drawing the specific embodiment of the present invention is further described, yet the present invention can realize with different forms, should not think just to be confined to described embodiment.
As shown in Figure 1, the invention provides a kind of USB feed circuit 1, comprising: the USB output port of first sensor 14, the second sensor 15, microprocessor (MCU) 16, regulating circuit 17, the second power stage port 18, reference power supply circuit 11, USB-HUB circuit 12 and expansion thereof.
Wherein, the input end of first sensor 14 connects the power input mouth 20 of the straight-through feed circuit of a usb host equipment, output terminal connects the input end of microprocessor 16, and the corresponding electric current of the first power that is used on the described straight-through feed circuit of perception turns magnitude of voltage;
The second sensor 15 input ends connect the power input mouth 20 of the straight-through feed circuit of described usb host equipment, output terminal connects the described power port 21 of described usb host equipment and the input end of described microprocessor 16 of outputing to, and is used for the corresponding electric current of perception the second power and turns magnitude of voltage;
Regulating circuit 17 input ends connect the output terminal of described first sensor 14 and the output terminal of described microprocessor 16, are used for adjusting output voltage according to the non-USB device required voltage that is connected to described usb host equipment;
The output voltage that the second power stage port 18 is adjusted according to described regulating circuit 17 is for the non-USB device that is connected to described usb host equipment provides the power stage that is not more than the second power;
Reference power supply circuit 11 output terminals directly or indirectly connect 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, is used to the USB device that is connected to described usb host equipment that reference power supply under the first power is provided;
Whether described microprocessor 16 is used for detecting the second power stage port 18 the non-USB device of connection, if do not connect non-USB device, then control described reference power supply circuit 11 and provide reference power supply under the first power for the USB device that is connected to described usb host equipment, and detect the USB device power demand that is connected to described usb host equipment when being higher than the first power at first sensor 14, control described reference power supply circuit 11 and stop external output, cut off simultaneously USB port 22 outputs of described usb host equipment; If the non-USB device of connection is arranged, then control the required voltage of non-USB device that described regulating circuit 17 outputs connect, and when the required power of non-USB device that described the second sensor 15 detects connection is higher than the second power, controls described regulating circuit 17 and stop external output.
Generally, described the first power is less than the second power, and for example, described the first power is 10W, and described the second power is 30W, and in this case, the reference power supply voltage that the 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, with the USB port 22 of the described main process equipment of output terminal indirect joint of realizing described reference power supply circuit 11; The input end that described USB-HUB circuit 12 has a USB port 22 that connects described usb host equipment with are connected the output terminal of output terminal of the described reference power supply circuit 11 of connection, be used for a USB port 22 of described usb host equipment is extended to a plurality of USB output ports.USB-HUB circuit among the figure is 1 to drag 3 types, be about to USB port 22 and be extended to 3 USB output port 13a, 13b, 13c, and 3 USB output port 13a, 13b, 13c are used to the USB device that self connects to obtain suitable voltage also being provided with a power supply parallel device (shown in the 19a among Fig. 1,19b, 19c) separately with on the circuit that the output terminal of described reference power supply circuit 11 is connected.
In other embodiments of the invention, in order to realize simultaneously the access of a plurality of non-USB device, the number of the second power stage port can arrange a plurality of, these the second power stage ports can all be connected on the regulating circuit, also can connect separately each self-corresponding regulating circuit by man-to-man mode.Therefore, the number of described regulating circuit is generally less than the number that equals described the second power stage port.
In the present embodiment, described USB feed circuit also comprise: detection switch circuit (not shown), be arranged between described the second power stage port 18 and the described microprocessor 16 (generally being the switching signal output pin that the control end of detection switch circuit is connected microprocessor), so that whether described microprocessor 16 is by having the non-USB device of connection (namely whether having plug to insert) to described detection switch circuit communication to detect the second power stage port 18.
Need to prove, 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 mainly is the powerful devices such as audio/video electronic product, printer, scanner, USB device refers to USB flash disk, portable hard drive, low-power equipment and the following emerging USB device such as storage card.
USB feed circuit of the present invention can be directly embedded in the usb host equipment, perhaps are embedded in the peripheral electronic product of usb host equipment, so that the desktop around the usb host equipment is succinct.But universal in order to improve, the cost of products of reduction usb host equipment and peripheral electronic product thereof can be assembled into these USB feed circuit separately an autonomous device.
Therefore, as shown in Figure 2, the present invention also provides a kind of USB electric supply installation 30, joins 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 is that to drag four, the second power stage ports be 3, the jacks that therefore provide 4 USB mouths that are used for the access USB device and 3 to be used for pegging graft non-USB device for the external world.
In sum; USB feed circuit provided by the invention and device thereof; by the first sensor on the straight-through feed circuit that are positioned at a usb host equipment; the second sensor; microprocessor; regulating circuit; the second power stage port and reference power supply circuit; can in time detect the power of the external peripheral required by electronic product of described usb host equipment; and according to detecting as a result adjustment and exporting required power; and when the power of the peripheral required by electronic product that accesses surpasses setting; in time cut off power supply process; thereby need not extra external power source, just can and 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 the USB method of supplying power to, comprising:
S31, be provided for the first sensor that the corresponding electric current of the first power on the described straight-through feed circuit of perception turns magnitude of voltage at the straight-through feed circuit of a usb host equipment, the input end of described first sensor connects the power input mouth of the straight-through feed circuit of described usb host equipment, and output terminal connects the input end of a microprocessor;
S32, straight-through feed circuit at described usb host equipment are provided for the second sensor that the corresponding electric current of perception the second power turns magnitude of voltage, the input end of described the second sensor connects the power input mouth of the straight-through feed circuit of described usb host equipment, and output terminal connects the described power port of described usb host equipment and the input end of described microprocessor of outputing to;
S33 accesses a regulating circuit, is used for adjusting output voltage according to the non-USB device required voltage that is connected to described usb host equipment, and 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, is used for the output voltage adjusted according to described regulating circuit, for the non-USB device that is connected to described usb host equipment provides the power stage that is not more than the second power;
S36, access a reference power supply circuit, be used to the USB device that is connected to described usb host equipment that reference power supply under the first power is provided, 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 S41, described microprocessor detect the second power stage port 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 that is connected to described usb host equipment, and further execution in step S44 and S45;
S43 if the non-USB device of connection is arranged, then controls the required voltage of non-USB device that described regulating circuit output connects, and execution in step S46 and S47;
S44, whether the USB device power demand that the first sensor detecting is connected to described usb host equipment is higher than the first power; If not, continue execution in step S42, described reference power supply circuit continues to provide the reference power supply under the first power; If, execution in step S45 then;
S45, microprocessor control described reference power supply circuit and stop external output, cut off simultaneously described usb host equipment;
S46, whether the required power of non-USB device that the second sensor detecting connects is higher than the second power, if not, continues execution in step S43, and described regulating circuit continues the required voltage of non-USB device that output connects; If, execution in step S47;
S47, microprocessor control described regulating circuit and stop external output.
In above-mentioned steps, S31 to S35 can regard the step of laying the USB feed circuit as usb host equipment such as notebook computers as, and step S41 can regard the process of the USB feed circuit power supply that lays as to step S47.Use in the process of USB feed circuit of the present invention at some, just connect before each parts of USB feed circuit self, can omit the execution of step S31 to S35, the power input mouth that directly input end of first sensor is connected the straight-through feed circuit of described usb host equipment, the power input mouth that the input end of the second sensor is connected the straight-through feed circuit of described usb host equipment, output terminal connects the described power port that outputs to described usb host equipment and gets final product, and the process of remaining USB feed circuit power supply is automatically processed and finished by microprocessor.
USB method of supplying power to disclosed by the invention; by the straight-through feed circuit at a usb host equipment first sensor is set; the second sensor; microprocessor; regulating circuit; the second power stage port and reference power supply circuit; can in time detect the power of the external peripheral required by electronic product of described usb host equipment; and according to detecting as a result adjustment and exporting required power; and when the power of the peripheral required by electronic product that accesses surpasses setting; in time cut off power supply process; thereby need not extra external power source, just can and provide protection for standard USB device and non-USB device continued power.
The below with 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, use the beneficial effect of the method for supplying power to of USB feed circuit of the present invention with easier, clearer understanding.
The straight-through feed circuit of notebook computer can be regarded as from this laptop adapter output terminal (being the power input mouth on the straight-through feed circuit of usb host equipment) to the power port that is input to notebook computer CPU(and outputs to described usb host equipment) one section circuit; First sensor is the 10W sensor, can turn magnitude of voltage by the corresponding electric current of perception 10W power; The second sensor is the 30W sensor, can turn magnitude of voltage by the corresponding electric current of perception 30W power; The 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 is carried out various state detectings or operation; The reference power supply circuit is 10W DC/DC circuit, and the 5V reference power supply of 10W can be provided for USB device; The USB-HUB circuit is 1 to drag the 3USB-HUB circuit, carries out conventional USB HUB switching, 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 was connected, microprocessor inserted the 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 was not inserted by plug, microprocessor can detect this state, and this moment, system default was USB-HUB large power supply output mode, thereby condition of work was provided can for the following USB device of 10W; Whether the required power of the USB device that the 10W sensor detecting inserts surpasses 10W; when the USB device power demand that inserts surpasses 10W; microprocessor can be by the 10W sensor detecting to super setting; microprocessor sends the signal of stopping power supply and is given to 10W DC/DC circuit at this moment; so that the 10WDC/DC circuit stops external output; and cut off the 5V USB power supply output (namely cutting off the standard USB port output of laptop) that notebook computer itself carries, to play a protective role.
When 30W power stage port had plug to insert, microprocessor can detect the variation of this state, and this moment, system automatically switched to the 30W power mode output, for the non-USB powerful device that inserts provides condition of work; Whether the required power of the USB device that the 30W sensor detecting inserts surpasses 30W; when the non-USB powerful device of outside surpasses 30W; microprocessor can be by the 30W sensor detecting to super setting; microprocessor sends the signal of stopping power supply and is given to 30W DC/DC circuit at this moment; so that 30W DC/DC circuit stops external output, to play a protective role.
In sum; USB feed circuit provided by the invention and device and method of supplying power to; by the first sensor on the straight-through feed circuit that are positioned at a usb host equipment; the second sensor; microprocessor; regulating circuit; the second power stage port and reference power supply circuit; can in time detect the power of the external peripheral required by electronic product of described usb host equipment; and according to detecting as a result adjustment and exporting required power; and when the power of the peripheral required by electronic product that accesses surpasses setting; in time cut off power supply process; thereby need not extra external power source, just can and provide protection for standard USB device and non-USB device continued power.
Obviously, those skilled in the art can carry out various changes and modification to invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (10)
1. USB feed circuit is characterized in that, comprising:
First sensor, input end connect the power input mouth of the straight-through feed circuit of a usb host equipment, and output terminal connects the input end of a microprocessor, and the corresponding electric current of the first power that is used on the described straight-through feed circuit of perception turns magnitude of voltage;
The second sensor, input end connects the power input mouth of the straight-through feed circuit of described usb host equipment, output terminal connects the described power port of described usb host equipment and the input end of described microprocessor of outputing to, and is used for the corresponding electric current of perception the second power and turns magnitude of voltage;
Regulating circuit, input end connect the output terminal of described first sensor and the output terminal of described microprocessor, are used for adjusting output voltage according to the non-USB device required voltage that is connected to described usb host equipment;
The second power stage port is according to the output voltage of described regulating circuit adjustment, for the non-USB device that is connected to described usb host equipment provides the power stage that is not more than the second power;
Reference power supply circuit, output terminal directly or indirectly connect the USB port of described main process equipment; Input end connects the output terminal of described first sensor and the output terminal of microprocessor, is used to the USB device that is connected to described usb host equipment that reference power supply under the first power is provided;
Described microprocessor, be used for detecting the second power stage port whether the non-USB device of connection is arranged, if do not connect non-USB device, then control described reference power supply circuit and provide reference power supply under the first power for the USB device that is connected to described usb host equipment, and detect the USB device power demand that is connected to described usb host equipment when being higher than the first power at first sensor, control described reference power supply circuit and stop external output, cut off simultaneously the USB port output of described usb host equipment; If the non-USB device of connection is arranged, then control the required voltage of non-USB device that described regulating circuit output connects, and when described the second sensor detecting is higher than the second power to the required power of non-USB device that connects, controls described regulating circuit and stop external output.
2. USB feed circuit as claimed in claim 1 is characterized in that, described the first power is less than the second power.
3. USB feed circuit as claimed in claim 2 is characterized in that, described the first power is 10W, and described the second power is 30W.
4. USB feed circuit as claimed in claim 1, it is characterized in that, during the USB port of the described main process equipment of output terminal indirect joint of described reference power supply circuit, described USB feed circuit also comprise: the USB-HUB circuit, input end with a USB port that connects described usb host equipment with are connected the output terminal of output terminal of the described reference power supply circuit of connection, be used for a USB port of described usb host equipment is extended to a plurality of USB output ports.
5. USB feed circuit as claimed in claim 4 is characterized in that, also are provided with the power supply parallel device between the output terminal of each described USB output port and described reference power supply circuit, and the USB device that is used to described USB output port to connect obtains suitable voltage.
6. USB feed circuit as claimed in claim 1 is characterized in that, the number of described the second power stage port is a plurality of.
7. USB feed circuit as claimed in claim 6 is characterized in that, the number of described regulating circuit is less than or equal to the number of described the second power stage port.
8. USB feed circuit as claimed in claim 1, it is characterized in that, also comprise: the detection switch circuit, be arranged between described the second power stage port and the described microprocessor, so that whether described microprocessor is by 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 each described USB feed circuit in the claim 1 to 8.
10. a right to use requires that each described USB feed circuit carry out the USB method of supplying power in 1 to 8, it is characterized in that, comprising:
Be provided for the first sensor that the corresponding electric current of the first power on the described straight-through feed circuit of perception turns magnitude of voltage at the straight-through feed circuit of a usb host equipment, the input end of described first sensor connects the power input mouth of the straight-through feed circuit of described usb host equipment, and output terminal connects the input end of a microprocessor;
Straight-through feed circuit at described usb host equipment are provided for the second sensor that the corresponding electric current of perception the second power turns magnitude of voltage, the input end of described the second sensor connects the power input mouth of the straight-through feed circuit of described usb host equipment, and output terminal connects the described power port of described usb host equipment and the input end of described microprocessor of outputing to;
Access a regulating circuit, be used for adjusting output voltage according to the non-USB device required voltage that is 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;
Output terminal at described regulating circuit arranges the second power stage port, is used for the output voltage according to described regulating circuit adjustment, for the non-USB device that is connected to described usb host equipment provides the power stage that is not more than the second power;
Access a reference power supply circuit, be used to the USB device that is connected to described usb host equipment that reference power supply under the first power is provided, 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 described microprocessor is detected the second power stage port the non-USB device of connection;
If do not connect non-USB device, then control described reference power supply circuit and provide reference power supply under the first power for the USB device that is connected to described usb host equipment, and detect the USB device power demand that is connected to described usb host equipment when being higher than the first power at first sensor, control described reference power supply circuit and stop external output, cut off simultaneously the USB port output of described usb host equipment;
If the non-USB device of connection is arranged, then control the required voltage of non-USB device that described regulating circuit output connects, and when described the second sensor detecting is higher than the second power to the required power of non-USB device that connects, controls described regulating circuit and stop external output.
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| 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 |
| CN106059013A (en) * | 2016-08-01 | 2016-10-26 | 联想(北京)有限公司 | Method for improving battery life and electronic equipment |
| CN106201807A (en) * | 2016-09-12 | 2016-12-07 | 陈斌 | A kind of multifunction electronic hardware and software debugging equipment |
| CN108509010A (en) * | 2018-03-21 | 2018-09-07 | 联想(北京)有限公司 | Method of supplying power to and power supply system |
| WO2020034148A1 (en) * | 2018-08-16 | 2020-02-20 | 深圳市大疆创新科技有限公司 | Power supply method and device |
| 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 |
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| CN106059013B (en) * | 2016-08-01 | 2020-09-25 | 联想(北京)有限公司 | Method for improving battery endurance and electronic equipment |
| CN106201807A (en) * | 2016-09-12 | 2016-12-07 | 陈斌 | A kind of multifunction electronic hardware and software debugging equipment |
| CN108509010A (en) * | 2018-03-21 | 2018-09-07 | 联想(北京)有限公司 | Method of supplying power to and power supply system |
| CN108509010B (en) * | 2018-03-21 | 2024-04-23 | 联想(北京)有限公司 | Power supply method and power supply system |
| WO2020034148A1 (en) * | 2018-08-16 | 2020-02-20 | 深圳市大疆创新科技有限公司 | Power supply method and device |
| 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 |
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