CN103809721A - Computer with charging function - Google Patents
Computer with charging function Download PDFInfo
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- CN103809721A CN103809721A CN201410006280.7A CN201410006280A CN103809721A CN 103809721 A CN103809721 A CN 103809721A CN 201410006280 A CN201410006280 A CN 201410006280A CN 103809721 A CN103809721 A CN 103809721A
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Abstract
The invention discloses a computer with the charging function. The computer comprises a body and a USB interface arranged in the body. The body provides a power supply through a power supplying circuit. The computer is characterized in that a voltage converting circuit is arranged between the USB interface and the power supplying circuit. The USB interface has the charging mode. Under the charging mode, a first voltage connected from the USB interface is transformed into a second voltage through the voltage converting circuit to be supplied to the power supplying circuit. The first voltage is smaller than the second voltage. The problems in the prior art are solved and charging devices can be shared. The charging devices and mobile power supplies specially applied to mobile phones, cameras and other electronic devices can also be used for charging the computer.
Description
Technical field
The present invention relates to notebook computer, desktop computer, all-in-one and access the electric equipment of power supply by connector.
Background technology
The mobile electronic product major part using is in the market all the adapter of the output 5V voltage of employing, and interface is all USB interface, is connected to electronic equipment charges by cable line.Present notebook computer has USB interface, and has realized by USB interface and having charged to other electronic equipments, but can not use adapter or other portable power source equipment of output 5V voltage to charge to notebook computer by USB interface.
Smart mobile phone brand Samsung on market, Lenovo, HTC, the power supply adaptor of what Apple used is output 5V, very small volume and less weight, and also interface on adapter is all the USB interface of standard.
But charging equipment can not share, while going out, want carrying mobile phone charger, computer charger simultaneously, bring great inconvenience to user.
Summary of the invention
The deficiency existing in order to overcome prior art, the object of the invention is to provide the computer with charge function with shared charging inlet.
For reaching above object, the invention provides a kind of computer with charge function, comprise body and the USB interface being arranged on described body, described body provides power supply by feed circuit, between described USB interface and feed circuit, be provided with voltage conversion circuit, described USB interface has charge mode, under described charge mode, be converted to second voltage from the first voltage of described USB interface access through voltage conversion circuit and offer feed circuit, the first described voltage is less than described second voltage.
Further optimization of the present invention is, described USB interface has data-transmission mode, and described USB interface works in one of them in charge mode and data-transmission mode.
Further optimization of the present invention is, comprises that one for switching the change-over switch of charge mode and data-transmission mode.
Further optimization of the present invention is, comprises a charge switch, and under described charge mode, described charge switch is exported the first voltage.
Further optimization of the present invention is, described charge switch comprises field effect transistor, and the S terminal of described field effect transistor is connected with USB interface, and described G terminal is connected with change-over switch.
Further optimization of the present invention is, described voltage conversion circuit is CS5171 voltage-regulation chip, described CS5171 chip comprises a current sensing resistor and the regulating resistance being connected with negative feedback pin, and described current sensing resistor and feed circuit are in parallel.
Further optimization of the present invention is, the resistance of described regulating resistance is 1.5 kilo-ohms, and the resistance of described current sensing resistor is 13.3 kilo-ohms.
Further optimization of the present invention is, at least one in described current sensing resistor and regulating resistance is resistance adjustable resistance.
Further optimization of the present invention is, the first described voltage is 5V.
Further optimization of the present invention is, described second voltage is 12V.
The invention has the beneficial effects as follows:
1) realize sharing of charging equipment.The special mobile phone of giving, charging equipment, portable power source that the electronic equipments such as camera use also can charge to notebook computer.While going out, only need to carry a kind of charger of specification;
2) electric weight of realizing in emergency circumstances shifts.When computer has not had electricity, but mobile phone still has electricity, can mobile phone electric weight be transferred to computer by a USB line realization and carry out electric weight transfer in emergency circumstances.Along with the development of technology, the battery capacity of mobile phone is increasing now, can realize electric weight transfer and seem important all the more between mobile phone and computer.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of the charge switch part of the present invention's computer with charge function;
Fig. 2 is the circuit theory diagrams that the present invention has the voltage regulator circuit of the computer of charge function.
Embodiment
Below preferred embodiment of the present invention is described in detail, thereby so that advantages and features of the invention can be easier to be it will be appreciated by those skilled in the art that, protection scope of the present invention is made to more explicit defining.
A kind of computer with charge function, comprise body and be arranged at the USB interface on body, body provides power supply by feed circuit, between USB interface and feed circuit, be provided with voltage conversion circuit, USB interface has charge mode, under charge mode, be converted to second voltage from the first voltage of USB interface access through voltage conversion circuit and offer feed circuit, wherein the first voltage is less than second voltage.
In the present embodiment, the first voltage is 5V.Because most computers have USB interface on market, can be in notebook computer indoor design the charging circuit based on USB 5V, thereby realize sharing of charging equipment.The special mobile phone of giving, the portable power source that the electronic equipments such as camera use also can charge to notebook computer.
What certainly need to mention especially is; along with the continuous revision of USB standard; USB realizes the trend that variable voltage is technical development, is 5V voltage so protection scope of the present invention should not only limit to the first voltage yet, can be the voltage that is less than second voltage of arbitrary size.Certainly can also be the first voltage that voltage range can change.If this first voltage can be 5V ~ 11V.The charger that so just can realize multiple different product different size can charge to notebook computer by USB interface.
In the present embodiment, second voltage is 12V, and 12V voltage is the supply voltage of a kind of that specification that in prior art, notebook is conventional.Certainly along with the development of technology, second voltage can be also magnitude of voltage arbitrarily, and the protection domain of second voltage magnitude of voltage should not be restricted.
USB interface has data-transmission mode, and USB interface works in one of them in charge mode and data-transmission mode.Can realize like this multiplexing of USB interface, in the time that needs charge, select charge mode, in the time not needing to charge, revert to normal data-transmission mode.Effectively save the space of notebook, and do not needed to arrange independent charging USB interface.
In order to realize the multiplexing of charge mode and data-transmission mode, also comprise that one for switching the change-over switch of charge mode and data-transmission mode.This change-over switch can be to exist with example, in hardware, and in the time pressing this switch, charge mode starts.This change-over switch can also be to exist with form of software, and a control panel is provided in system, and by select charge mode on control panel, both, for starting this change-over switch, charge mode started.
The present embodiment comprises a charge switch, and under charge mode, charge switch is exported the first voltage.Charge switch comprises field effect transistor, and the S terminal of field effect transistor is connected with USB interface, and G terminal is connected with change-over switch.In the time of charge mode, change-over switch is to low voltage signal of G terminal, and in the time there is a voltage difference between S terminal and D terminal, field effect transistor conducting, exports first voltage that magnitude of voltage is similar to S terminal.
Referring to accompanying drawing 1, in the present embodiment, voltage conversion circuit is CS5171 voltage-regulation chip, and CS5171 chip comprises a current sensing resistor R2 and the regulating resistance R1 being connected with negative feedback pin, and current sensing resistor and feed circuit are in parallel.
The resistance of regulating resistance is 1.5 kilo-ohms, and the resistance of current sensing resistor is 13.3 kilo-ohms, according to the description of chip
vout=1.276/ regulating resistance * current sensing resistor+1.276can calculate, at this moment can provide a size to be about the second voltage of 12V to feed circuit.
Need to mention especially, in order to realize stability and the high-adaptability of second voltage, at least one in current sensing resistor and regulating resistance is resistance adjustable resistance.In the time that the first voltage of input is not 5V, by calculating or call the information pre-seting, can regulate current sensing resistor or regulating resistance to make second voltage is still 12V; And along with the development of computer technology, the supply voltage that may need in the time using different computer functions is different, even so the first voltage is still 5V, but while needing second voltage to become other magnitudes of voltage, still can regulate current sensing resistor or regulating resistance to make second voltage be changed to required voltage.
Principle of work of the present invention is below described in detail in detail.
It in Fig. 1, is the circuit increasing for USB charging specially on common USB circuit.
In the present embodiment, Q1 Q2 Q3 and the circuit between them jointly form charge switch.
In the time that USB port is set to normal USB and uses, KBC3_USBPWRON# is low effectively, and Q1 can conducting like this, and USB charge function does not use.
In the time that USB port is set to USB charge function, KBC3_USBPWRON# is high level, now insert Q2 conducting after USB charger or portable power source, KBC3_USBPWROK# signal is low effectively, this signal is connected to MICOM end, notice MICOM can carry out USB charging, and MICOM can select the charging current setting in inside in advance to charge simultaneously.Because USB charger power is in 5W left and right under normal circumstances, charging current generally will be arranged on 200 ~ 300mA like this, and difference arranges with normal charging.At this moment MICOM returns to KBC3_USBCHGEN signal and makes Q3 conducting, produces 5V USB_CHARGE_VCC.Control and realized the multiplexing of the normal use of USB port and USB charge function by MICOM like this.
Fig. 2 is output as routine circuit with 12V, and the battery that notebook computer uses generally in the market is 2 strings, 3 strings, or 4 strings, and take common 16850 model battery cores as example, corresponding charging voltage is as follows:
| Battery serial number |
Nominal | Charging voltage | |
| 2 strings | 7.4V |
8.4 |
|
| 3 strings | 11.1V | 12.6V | |
| 4 strings | 14.8V | 14.8V |
Wherein R1 is regulating resistance, and R2 is current sensing resistor.
USB_CHARGE_VCC in Fig. 1 is connected to the VCC end in Fig. 2, by the booster circuit of Fig. 2,5V voltage is elevated to battery charging voltage.
Circuit conditioning:
According to chip instructions, the voltage representative value of FB (2PIN) pin is 1.276V, and by regulating the R1 in figure, R2 regulates output voltage, and formula is as follows: Vout=1.276/R1*R2+1.276
Will be for example 3 crosstalk pond chargings, the R2 that can arrange in Fig. 2 changes 13.3Kohm into.
In practical application, on PCB, the Vout in Fig. 2 is connected to anode, in MICOM, set in advance that USB charge function enables and charging current value after, the notebook computer that just can realize 5V USB interface after having USB charging equipment or the portable power source based on 5V to insert USB port charges.Realize sharing of charging equipment.The special mobile phone of giving, charging equipment, portable power source that the electronic equipments such as camera use also can charge to notebook computer.And along with the development of computer technology, the reduction of computer power consumption, this USB charging modes can also substitute existing charging technique and charge to computer.
Above embodiment is only explanation technical conceive of the present invention and feature; its object is to allow person skilled in the art understand content of the present invention and implemented; can not limit the scope of the invention with this, all equivalences that Spirit Essence does according to the present invention change or modification is all encompassed in protection scope of the present invention.
Claims (10)
1. one kind has the computer of charge function, comprise body and the USB interface being arranged on described body, described body provides power supply by feed circuit, it is characterized in that: between described USB interface and feed circuit, be provided with voltage conversion circuit, described USB interface has charge mode, under described charge mode, be converted to second voltage from the first voltage of described USB interface access through voltage conversion circuit and offer feed circuit, the first described voltage is less than described second voltage.
2. the computer with charge function according to claim 1, is characterized in that: described USB interface has data-transmission mode, described USB interface works in one of them in charge mode and data-transmission mode.
3. the computer with charge function according to claim 2, is characterized in that: comprise that one for switching the change-over switch of charge mode and data-transmission mode.
4. the computer with charge function according to claim 2, is characterized in that: comprise a charge switch, under described charge mode, described charge switch is exported the first voltage.
5. the computer with charge function according to claim 2, is characterized in that: described charge switch comprises field effect transistor, the S terminal of described field effect transistor is connected with USB interface, and described G terminal is connected with change-over switch.
6. the computer with charge function according to claim 1, it is characterized in that: described voltage conversion circuit is CS5171 voltage-regulation chip, described CS5171 chip comprises a current sensing resistor and the regulating resistance being connected with negative feedback pin, and described current sensing resistor and feed circuit are in parallel.
7. the computer with charge function according to claim 6, is characterized in that: the resistance of described regulating resistance is 1.5 kilo-ohms, and the resistance of described current sensing resistor is 13.3 kilo-ohms.
8. the computer with charge function according to claim 6, is characterized in that: at least one in described current sensing resistor and regulating resistance is resistance adjustable resistance.
9. the computer with charge function according to claim 1, is characterized in that: the first described voltage is 5V.
10. the computer with charge function according to claim 1, is characterized in that: described second voltage is 12V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410006280.7A CN103809721A (en) | 2014-01-07 | 2014-01-07 | Computer with charging function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410006280.7A CN103809721A (en) | 2014-01-07 | 2014-01-07 | Computer with charging function |
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| Publication Number | Publication Date |
|---|---|
| CN103809721A true CN103809721A (en) | 2014-05-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410006280.7A Pending CN103809721A (en) | 2014-01-07 | 2014-01-07 | Computer with charging function |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6668296B1 (en) * | 2000-06-30 | 2003-12-23 | Hewlett-Packard Development Company, L.P. | Powering a notebook across a USB interface |
| US20080111522A1 (en) * | 2006-11-15 | 2008-05-15 | Motorola, Inc. | Method and system for charging electronic devices |
| CN201167239Y (en) * | 2007-07-28 | 2008-12-17 | 成都芯源系统有限公司 | USB charging circuit with current-limiting function |
| CN101425749A (en) * | 2007-10-29 | 2009-05-06 | 凌特公司 | Bidirectional power converters |
-
2014
- 2014-01-07 CN CN201410006280.7A patent/CN103809721A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6668296B1 (en) * | 2000-06-30 | 2003-12-23 | Hewlett-Packard Development Company, L.P. | Powering a notebook across a USB interface |
| US20080111522A1 (en) * | 2006-11-15 | 2008-05-15 | Motorola, Inc. | Method and system for charging electronic devices |
| CN201167239Y (en) * | 2007-07-28 | 2008-12-17 | 成都芯源系统有限公司 | USB charging circuit with current-limiting function |
| CN101425749A (en) * | 2007-10-29 | 2009-05-06 | 凌特公司 | Bidirectional power converters |
Non-Patent Citations (1)
| Title |
|---|
| ON SEMICONDUCTOR: "《1.5A 280kHz/560kHz Boost Regulators》", 30 June 2001, article """" * |
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Application publication date: 20140521 |
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