CN102088204B - Electronic device for switching power supply mode through detecting external power supply - Google Patents
Electronic device for switching power supply mode through detecting external power supply Download PDFInfo
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- CN102088204B CN102088204B CN 200910310960 CN200910310960A CN102088204B CN 102088204 B CN102088204 B CN 102088204B CN 200910310960 CN200910310960 CN 200910310960 CN 200910310960 A CN200910310960 A CN 200910310960A CN 102088204 B CN102088204 B CN 102088204B
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Abstract
The invention relates to an electronic device for switching a power supply mode through detecting external power supply. The device is used for receiving an external power from a first power supply and a second power supply, an electric potential output by the first power supply is fallen in the first electric potential interval, an electric potential output by the second power supply is fallen in the second electric potential interval, a system circuit of the electronic device determines whether the external power is from the first power supply or second power supply by means of detecting the fact that the external power is fallen in the first electric potential interval and second electric potential interval; when the external power is from the first power supply, the system circuit is switched to the first external power mode; and when the external power is from the second power supply, the system circuit is switched to the second external power mode. By means of switchover of power modes, the first or second power supply is optimizedly used by the system circuit.
Description
Technical field
The power mode that present invention is directed to electronic installation switches, and particularly a kind of external power of detecting is originated and the electronic installation of Switching power pattern.
Background technology
Consult shown in Figure 1ly, be the electric power system square of portable electronic devices in the prior art 1.Portable electronic devices 1 mainly comprises supply of electric power circuit and circuit system 2, and the supply of electric power circuit comprises external power source and internal power source 3.The external power source is that an interchange turns direct current transducer, sees through an electric connector 4 and is electrically coupled to the supply of electric power circuit, supplies a direct current electric power to circuit system 2.Internal power source 3 is battery module, to circuit system 2, and can be used as the UPS in external power source in order to supply electric power in the time can't obtaining external power, avoids the electric power in external power source to interrupt suddenly.
The supply of electric power time in external power source can be considered infinitely great, and internal power source 3 only has fixing capacitance, and its supply of electric power time is along with power output changes.Therefore, portable electronic devices 1 can possess at least two kinds of power modes usually: external power pattern and internal power pattern.When using the external power source that electric power is provided, the circuit system 2 of portable electronic devices 1 can switch to the external power pattern, operates with maximum power, and portable electronic devices 1 is operated with best efficiency.Simultaneously, the electric power of external power input is capable of bypass to a charging device 5, and seeing through charging device 5 provides suitable voltage and electric current that inner electric power source 3 is charged.
When the output power in external power source interrupts, provide electrical power to circuit system 2 by internal power source 3, circuit system 2 can switch to the internal power pattern, operates with relatively low usefulness, reduce power consumption, to prolong the internal power 3 supply of electric power times of source.
About the switching of external power pattern and internal power pattern, circuit system 2 is that whether input electric power switches according to the external power source.Circuit system 2 for example with charging device, judges whether electric connector 4 has the electric power input usually with a detecting loop.If the unregulated power input then represents without external power, and internal power source 3 need namely can not continue output power through switching.If electric connector 4 has the electric power input, then representative has the external power input, and internal power source 3 can stop output power because of bias relation.
In order to prolong the time of using out of doors, usually can additionally provide electric power with an external power bag (External Power Pack), the deficiency in the time of can't using interchange to turn direct current transducer as the external power source to replenish.The form of external power bag comprises power brick (BatteryPack), fuel cell or solar cell, wherein the capacitance of power brick (Battery Pack) and fuel cell turns direct current transducer still for limited with respect to interchange, and solar cell is not enough to the power consumption of independent system circuit 2, only assisting as the internal power source.Yet, the external power bag still by electric connector 4 input electric powers to circuit system 2, circuit system 2 is judged as it with exchanging turns the identical external power source of direct current transducer, and continue to operate with maximum efficiency.The user is the power mode of switched system circuit 2 voluntarily, just can make external power bag performance ceiling effect.If the user forgets switching, circuit system 2 will operate with the power mode of maximum efficiency, and consumes rapidly the electric power of external power bag, and has shortened significantly the service time of external power bag.
Summary of the invention
In the prior art, because portable electronic devices and can't judge the form in external power source, so portable electronic devices will continue with the maximum efficiency running, cause the external power bag of limited capacitance can't effectively bring into play the benefit that prolongs the electricity usage time.
For the problems referred to above, the present invention proposes a kind of external power of detecting and originates and the electronic installation of Switching power pattern, can judge the form in external power source, and the automatic switchover power mode.
The invention provides and to detect the external power source and the electronic installation of Switching power pattern, to receive an external power from least one the first electric power source and one second electric power source, wherein the current potential of the first electric power source output drops on one first potential region, the current potential of the second electric power source output drops on one second potential region, and the first potential region and this second potential region do not overlap.
Electronic installation comprises a circuit system, an electric connector, a current potential detector, an embedded controller.Circuit system has at least one the first external power pattern and one second external power pattern.One end of electric connector is used for the first electric power source or the second electric power source electric property coupling, and the other end is electrically coupled to circuit system.The current potential detector has a detecting input and a detecting output; The detecting input is electrically coupled to electric connector, in order to capturing the current potential of electric connector, and by the current potential of detecting output output electric connector.Embedded controller is sent to circuit system in order to receive the current potential of electric connector.When the current potential of electric connector drops on the first potential region, circuit system switches to the first external power pattern; When the current potential of electric connector drops on the second potential region, circuit system switches to the second external power pattern.By the switching of power mode, circuit system can carry out optimized electricity usage to the first electric power source or the second electric power source.
Effect of the present invention is, electronic installation can be judged the source of external power, thereby the power mode of automatic switchover system circuit carries out the optimization utilization with the source for various external powers.The user does not need again manual switchover power mode, avoids the user to forget manual switchover and causes circuit system to use the electric power source of limited capacitance with dynamical power mode.
Description of drawings
Fig. 1 is in the prior art, the electric power system square of portable electronic devices.
Fig. 2 is the electric power system calcspar of the embodiment of the invention.
Fig. 3 is the circuit system calcspar of the embodiment of the invention.
Fig. 4 and Fig. 5 are in the embodiment of the invention, use the schematic diagram in different external powers source.
Fig. 6 is in the embodiment of the invention, changes the electric power system calcspar of example.
Fig. 7 is in the embodiment of the invention, changes the circuit system calcspar of example.
Embodiment
See also Fig. 2 and shown in Figure 3, be the disclosed a kind of electronic installation 1000 of detecting external power source Switching power pattern of the embodiment of the invention, this electronic installation 1000 comprises a supply of electric power and circuit for detecting 100 and a circuit system 200.Supply of electric power and circuit for detecting 100 be in order to receiving the outside direct current power in an external power source, and transmit electric power to circuit system 200.Supply of electric power and circuit for detecting 100 are detected the electric power source form of external power simultaneously, transmit a detecting result to circuit system 200.Circuit system 200 receives the detecting result, can automatically switch power mode, uses to prolong the service time that circuit system 200 uses the external power source.
Consult Fig. 2 and shown in Figure 3, circuit system 200 is in order to provide the major function of electronic installation 1000, circuit system 200 comprises central processing unit a 210 (CentralProcessor Unit at least, CPU), a system chipset 220, an Installed System Memory 230, a basic input output system 240 (BasicInput/Output System, BIOS), a keyboard controller 250, a stationary storage medium 260 (FixedStorage Media), a display interface 270, a display 280, an input unit 290.Electronic installation 1000 loads an operating system (Operation System, OS), is stored in stationary storage medium 260.Aforementioned system chipset 220 comprises South Bridge chip and north bridge chips, in order to provide bus make Installed System Memory 230, BIOS 240, keyboard controller 250, stationary storage medium 260, and display interface 270 see through system chipset 220 and be electrically coupled to central processing unit 210, to carry out transfer of data.Input unit 290 is electrically coupled to keyboard controller 250.In compact electronic device 1000, for example in PDA or PND, Installed System Memory 230 and stationary storage medium 260 can be incorporated into single flash memory module, see through the setting of Memory Controller Hub or OS, flash memory module is divided into Installed System Memory 230 in order to the load and execution program, and stored the stationary storage medium 260 of OS and application program.
Consult shown in Figure 3ly, supply of electric power and circuit for detecting 100 comprise an electric connector 110, a battery module 120, a charging device 130, a current potential detector 140, an embedded controller 150.
Consult shown in Figure 3ly, electric connector 110 is Direct current power source socket (DC Jack), and the one end is used for a plug and inserted, so that an external power source is electrically coupled to electric connector 110, receives direct current and also is sent to supply of electric power and circuit for detecting 100.The other end of electric connector 110 is electrically coupled to circuit system 200, in order to transmit direct current to DC-DC voltage conversion circuit 310.DC-DC voltage conversion circuit 310 distribution electric power are input as a plurality of direct currents outputs, and further each galvanic voltage of exporting of conversion is appropriate voltage, and are sent to each electronic building brick in the circuit system 200.
Consult shown in Figure 3ly, battery module 120 comprises one or a plurality of battery, and each battery can be Ni-MH battery, lithium ion battery or lithium polymer battery.Battery module 120 has a battery output 121 and a battery earth terminal 122, battery output 121 is electrically coupled to circuit system 200, in order to provide a direct current electric power to circuit system 200, wherein the direct current power of battery output 121 outputs of battery module 120 possesses a battery module current potential.
Consult shown in Figure 3ly, electronic installation 1000 more comprises the DC circuit that always circulates (DC-DC Circuit) 310, in order to receive electric power from electric connector 110 or battery module 120.DC-DC circuit 310 comprises a plurality of DC-DC electric pressure converter (not shown), one end of each DC-DC electric pressure converter is parallel to electric connector 110, the other end is electrically coupled to respectively central processing unit 210, system chipset 220, Installed System Memory 230, basic input output system 240, keyboard controller 250, stationary storage medium 260, display interface 270, display 280, and input unit 290, with changing voltage and distribute through the direct current of changing voltage each electronic building brick to circuit system 200.
Consult shown in Figure 3, charging device 130 have a charging input end 131 and one the charging output 132.Charging input end 131 is electrically coupled to electric connector 110, and charging output 132 is electrically coupled to the battery output 121 of battery module 120.Charging device 130 receives electric power with charging input end 131 from electric connector 110, after voltage transitions and Current Control, by the charging current of the standby charging voltage of charging output 132 output devices.Charging voltage is greater than the battery module output potential of battery module 120, so that charging device 130 can to battery module 120 chargings, be controlled the electric current to battery module 120 chargings, to charge safely simultaneously.
Consult shown in Figure 3, current potential detector 140 have one the detecting input 141 and one the detecting output 142.Detecting input 141 is electrically coupled to electric connector 110, in order to capture the current potential of electric connector 110, and detecting output 142 is electrically coupled to embedded controller 150, and the current potential of this electric connector 110 that is captured with output potential detector 140 is to embedded controller 150.On implementation, because current potential size be analog signal, so current potential detector 140 is an analog-to-digital converter, exports in order to current potential is converted to digital signal, and is embedded into 150 receptions of formula controller and processes.
Consult shown in Figure 3ly, the current potential that embedded controller 150 captures in order to receive current potential detector 140, and produce a detecting result with specific communications protocol coding is sent to circuit system 200.Generally speaking, embedded controller 150 is to be electrically coupled to System on Chip/SoC, to meet the communications protocol of South Bridge chip group bus standard or north bridge chipset bus standard, the current potential of the electric connector 110 of transmission current potential detector 140 outputs is to north bridge chips or the South Bridge chip of system chipset 220, be sent to central processing unit 210 by system chipset 220 again, carry out corresponding action for central processing unit 210.
Provide the electric power source of outside direct current power to comprise that interchange turns dc rectifier, power brick (Battery Back), fuel cell, solar cell.The normal output potential of each electric power source all possesses a potential region.The normal output of electric power source can through preseting, make the neither overlapping of potential region of different electric power source.Turn dc rectifier as example take interchange, the current potential of its output about 16 to 19Volt; The output potential interval of solar cell about 14 to 16Volt; The output potential of fuel cell is approximately 12 to 14Volt; The output potential interval of power brick is roughly identical with battery module, about 8 to 12Volt.
Consult Fig. 4 and shown in Figure 5, the minimum enforcement important document of the embodiment of the invention is selectively to adopt one first electric power source 410 and the outside direct current power of one second electric power source, 420 supplies, or do not adopt outside direct current power, and directly supply electric power with the battery module 120 of inside.Aforementioned the first electric power source 410 and the second electric power source 420 can be to exchange and turn dc rectifier, power brick (BatteryBack), fuel cell or solar cell, and the current potential of the first electric power source 410 outputs drops on one first potential region, the current potential of the second electric power source 420 output drops on one second potential region, and the first potential region and the second potential region be not for overlapping.
In addition, establish one first diode 123 between the battery output 121 of battery module 120 and the circuit system 200, the forward bias voltage drop direction of this first diode 123 is towards circuit system 200 by battery output 121.Establish one second diode 111 between electric connector 110 and the circuit system 200, the forward bias voltage drop direction of this second diode 123 is towards circuit system 200 by electric connector 110.The first diode 123 and the second diode 111 usefulness are avoided a higher output feedback electric power lower to voltage of voltage simultaneously so that a relatively high meeting of output voltage is only arranged to circuit system 200 output powers in battery module 120 and the external power source.
Aforesaid the first potential region and the second potential region system write first in this embedded controller 150, and the first electric power source 410 or the second electric power source 420 are selectively to be electrically coupled to electric connector 110.
When the first electric power source 410 or the second electric power source 420 are electrically coupled to electric connector 110, current potential detector 140 can be by the current potential of detecting input 141 acquisition electric connectors 110, after simulation and digital translation, to this embedded controller 150, embedded controller 150 is this current potential and the first potential region and the second potential region can be compared by the current potential of current potential output 142 output institute acquisition electric connectors 110.
When the current potential of this electric connector 110 drops on the first potential region, represent the first electric power source 410 and be electrically coupled to electric connector 110, the detecting result that the current potential of embedded controller 150 output electric connectors 110 drops on the first potential region is to circuit system 200, makes circuit system 200 switch to the first external power pattern for central processing unit 210 according to the characteristic of the first electric power source 410.
When the current potential of this electric connector 110 drops on the second potential region, represent the second electric power source 420 and be electrically coupled to electric connector 110, the detecting result that the current potential of embedded controller 150 output electric connectors 110 drops on the second potential region is to circuit system 200, makes circuit system 200 switch to the second external power pattern for central processing unit 210 according to the characteristic of the second electric power source 420.
When the current potential of electric connector 110 is lower than the first potential region and the second potential region, represent the power shortage of the first electric power source 410 or the second electric power source 420 with the supply electricity needs.This moment, system supplied electric power by battery module 120, and then circuit system 200 central processing units 210 make circuit system 200 switch to the internal power pattern.
When the current potential of electric connector 110 is zero, represent the first electric power source 410 or the second electric power source 420 does not have electric property coupling electric connector 110.This moment, system supplied electric power by battery module 120, and then central processing unit 210 makes circuit system 200 switch to the internal power pattern.
Consult Figure 6 and Figure 7, the keyboard controller 250 of circuit system 200 itself also is an embedded controller, therefore embedded controller 150 is to be removed, make the detecting output 142 of current potential detector 140 directly be electrically coupled to keyboard controller 250, compare output potentials, the first potential region, reach the detecting result of the second potential region to circuit system 200 by keyboard controller 250 again.
In the present invention, embedded controller 150 or keyboard controller 250 must not need to compare output potential, the first potential region, reach the second potential region.The first potential region and the second potential region can be recorded in the stationary storage medium 260 of circuit system 200, when system boot by in the central processing unit 210 loading system internal memories 230.Need to being encoded and be sent to the central processing unit 210 of circuit system 200 current potential of current potential detector output of embedded controller 150 or keyboard controller 250.Central processing unit 210 is compared output potentials, the first potential region, is reached the second potential region, uses to determine that output potential is positioned at the first potential region or the second potential region.Central processing unit 210 judges that by the first potential region, the second potential region outside direct current power from the first electric power source 410 or the second electric power source 420, uses the power mode of Adjustment System circuit 200.
Above explanation with the first electric power source, the second electric power source, the first potential region, and the second potential region describe, in fact selectable electric power source can be more than two, for example with interchange turn dc rectifier, power brick, fuel cell, and solar cell as the first electric power source, the second electric power source, the 3rd electric power source, and the 4th electric power source, and possess respectively nonoverlapping the first potential region, the second potential region, the 3rd potential region, and the 4th potential region.
Claims (10)
1. can detect the external power source and the electronic installation of Switching power pattern for one kind, in order to receive an external power from least one the first electric power source and one second electric power source, the current potential of described the first electric power source output drops on one first potential region, the current potential of described the second electric power source output drops on one second potential region, and this first potential region and this second potential region do not overlap, and this electronic installation comprises
One circuit system has at least one the first external power pattern and one second external power pattern;
One electric connector, one end are used for this first electric power source or this second electric power source electric property coupling, and the other end is electrically coupled to this circuit system;
One current potential detector has a detecting input and a detecting output; This detecting input is electrically coupled to this electric connector, in order to capturing the current potential of this electric connector, and is exported the current potential of this electric connector by this detecting output; And
One embedded controller in order to receive the current potential of this electric connector, is sent to this circuit system; And
Wherein, when the current potential of this electric connector drops on this first potential region, this circuit system switches to this first external power pattern; When the current potential of this electric connector drops on this second potential region, this circuit system switches to this second external power pattern.
2. electronic installation according to claim 1 is characterized in that, this circuit system comprises an internal power pattern, and this electronic installation comprises:
One battery module has a battery output and a battery earth terminal, and this battery output is electrically coupled to circuit system, and in order to providing a direct current electric power to this circuit system, and this battery output is exported a battery module current potential;
Wherein, when the current potential of this electric connector was lower than this first potential region, this second potential region or is zero, this circuit system switched to this internal power pattern.
3. electronic installation according to claim 2 comprises:
One charging device has a charging input end and a charging output, and this charging input end is electrically coupled to this electric connector, and this charging output is electrically coupled to the battery output of this battery module, in order to this battery module is charged.
4. electronic installation according to claim 3 is characterized in that:
Establish one first diode between the battery output of this battery module and the circuit system, and the forward bias voltage drop direction of this first diode is towards this circuit system by this battery output; And
Establish one second diode between this electric connector and the circuit system, the forward bias voltage drop direction of this second diode is towards this circuit system by this electric connector.
5. electronic installation according to claim 3 is characterized in that, this circuit system comprises at least:
One system chipset;
One central processing unit and an Installed System Memory, this Installed System Memory sees through this system chipset and is electrically coupled to this central processing unit; And
One stationary storage medium sees through this system chipset and is electrically coupled to this central processing unit, in order to store an operating system.
6. electronic installation according to claim 5 is characterized in that, this circuit system more comprises:
One basic input output system, see through this system chipset and be electrically coupled to this central processing unit, wherein this first external power pattern, the second external power pattern and this internal power pattern are stored in this basic input output system, use for this central processing unit and load this Installed System Memory.
7. electronic installation according to claim 5 is characterized in that, this first external power pattern, the second external power pattern and this internal power pattern are stored in this stationary storage medium, use for this central processing unit and are written into this Installed System Memory.
8. electronic installation according to claim 5 is characterized in that, this embedded controller is a keyboard controller, and this keyboard controller is used for an input unit and is electrically coupled to this system chipset.
9. electronic installation according to claim 5 comprises the DC circuit that always circulates, and receives electric power in order to certainly this electric connector or this battery module, with changing voltage and distribute direct current through changing voltage to this circuit system.
10. electronic installation according to claim 1 is characterized in that, this current potential detector is an analog-to-digital converter, exports in order to current potential is converted to digital signal, and is received by this embedded controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910310960 CN102088204B (en) | 2009-12-05 | 2009-12-05 | Electronic device for switching power supply mode through detecting external power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910310960 CN102088204B (en) | 2009-12-05 | 2009-12-05 | Electronic device for switching power supply mode through detecting external power supply |
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| Publication Number | Publication Date |
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| CN102088204A CN102088204A (en) | 2011-06-08 |
| CN102088204B true CN102088204B (en) | 2013-01-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200910310960 Expired - Fee Related CN102088204B (en) | 2009-12-05 | 2009-12-05 | Electronic device for switching power supply mode through detecting external power supply |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US11476717B2 (en) * | 2017-09-29 | 2022-10-18 | Hewlett-Packard Development Company, L.P. | Transmission of wireless power |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2620413Y (en) * | 2003-05-21 | 2004-06-09 | 无敌科技(西安)有限公司 | Portable electronic apparatus with charger function |
| CN1622004A (en) * | 2003-11-24 | 2005-06-01 | 顺德市顺达电脑厂有限公司 | Electric power administration arrangement and method for portable computers with auxiliary power supply |
| CN1665097A (en) * | 2004-03-01 | 2005-09-07 | 宏碁股份有限公司 | Power supply system for supplying power to an electronic apparatus |
| CN101154827A (en) * | 2006-09-25 | 2008-04-02 | 佛山市顺德区顺达电脑厂有限公司 | Power supply module and power control method for personal digital assistant |
-
2009
- 2009-12-05 CN CN 200910310960 patent/CN102088204B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2620413Y (en) * | 2003-05-21 | 2004-06-09 | 无敌科技(西安)有限公司 | Portable electronic apparatus with charger function |
| CN1622004A (en) * | 2003-11-24 | 2005-06-01 | 顺德市顺达电脑厂有限公司 | Electric power administration arrangement and method for portable computers with auxiliary power supply |
| CN1665097A (en) * | 2004-03-01 | 2005-09-07 | 宏碁股份有限公司 | Power supply system for supplying power to an electronic apparatus |
| CN101154827A (en) * | 2006-09-25 | 2008-04-02 | 佛山市顺德区顺达电脑厂有限公司 | Power supply module and power control method for personal digital assistant |
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Owner name: HANDA PRECISION ELECTRONIC (KUNSHAN) CO., LTD. Free format text: FORMER OWNER: FOSHAN SHUNDE DISTRICT MITAC PRECISION TECHNOLOGY CO., LTD. Effective date: 20130704 |
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