CN103901959A - Mainboard and power management method thereof - Google Patents
Mainboard and power management method thereof Download PDFInfo
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- CN103901959A CN103901959A CN201310072532.1A CN201310072532A CN103901959A CN 103901959 A CN103901959 A CN 103901959A CN 201310072532 A CN201310072532 A CN 201310072532A CN 103901959 A CN103901959 A CN 103901959A
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Abstract
The invention discloses a mainboard which is applied to various power supplies with different load driving capacities. The power supply provides a supply voltage source to the motherboard. The mainboard includes: a comparator; the reference voltage generating circuit outputs reference voltage coupled to one input end of the comparator; a power load having a power output terminal coupled to the supply voltage source and a control terminal coupled to an output terminal of the comparator; an interface voltage; a potential determining resistor coupled to the interface voltage; the expansion card slot is used for the electric insertion of the expansion card and is provided with a state pin coupled with the potential determining resistor and the other input end of the comparator. When the expansion card is inserted into the expansion card slot, the power load is closed; otherwise, the power load is turned on to increase the output load of the supply voltage source.
Description
[technical field]
The present invention has about a kind of circuit board and method for managing power supply thereof, particularly a kind of motherboard and method for managing power supply thereof.
[background technology]
In computing machine in early days, on motherboard, at least need to arrange central processing unit (central processing unit, CPU), display card (graphics card), internal memory (memory module) ability normal boot-strap, then enter operating system (operating system, OS) normal operation.Along with the progress of integrated circuit manufacture process ability, more and more many functions are integrated among same chips, for example there is at present considerable low order display card function to be integrated in the chipset (chipset) of motherboard, even further integrate with central processing unit.In addition, motherboard now also seldom need to plug extra sound card so that sound effect function to be provided, and therefore makes to need on motherboard the spare part number that plugs in addition less and less.
And, how integrated circuit manufacture process ability has come rice (nanometer, 10 negative 9 meters) technical level of grade, except integrating more and more many functions as above-mentioned on same chips, and can promote outside circuit operation frequency, the required power consumption of chip is also less and less, make the mainly motherboard circuits with a large amount of integrated circuit operations, the system power dissipation of its entirety is also less and less with work, even, under the application situation of some low power consumption running, its overall power is less than 5 watts (Watt).
Also therefore, the power supply unit (power supply unit, PSU) in computer installation is under current application situation, and it has not been problem that maximum can be supplied power.But some commercially available power supply unit; its supply-voltage source is generally positive 12 volts of power supplys; when kicking the beam, output load is less than 0.8 ampere-hour as output current; the function that its voltage is adjusted (regulation) can start to occur abnormal situation; even start its low current protection (under current protection) mechanism, and automatically cut off its power supply output.For example, in the time that computer installation starts boot-strap program code, entire system power consumption has between given period suitable little in start process, the part of for example central processing unit, its power consumption is less than 6 watts, if now computer installation collocation is above-mentioned power supply unit, its just can automatic cut-off power output, cause the computer installation cannot normal boot-strap, also just cannot enter operating system.
Owing to buying voluntarily the required all parts of computer installation at present, and the user who assembles voluntarily overall calculation machine system is found almost everywhere, and therefore can not avoid it to choose above-mentioned power supply unit, and then meet with described problem.The mode of dealing with problems at present, mainly contain following two kinds: first, power supply unit is enclosed a fictitious load (dummy load) with its product, fictitious load is a powerful cement resistor, and by the female seat of Winchester disk drive attaching plug, be connected on the supply-voltage source of power supply unit, for example positive 12 voltaism potential sources, make the output load of supply-voltage source continue to maintain on the setting value that can normally work.But this method makes power supply unit have unnecessary output load always, may cause cannot be by the 80 PLUS international norms for power supply unit.The second, manufacturer plugs one group of fixing fictitious load on motherboard, and its purpose is identical with first method, but may cause computer installation cannot pass through the standard of Energy Star (Energy Star).
[summary of the invention]
In view of above problem, the invention provides a kind of motherboard and method for managing power supply thereof, make motherboard be applied to different power supply units, can maintain again the efficiency optimization of system power.
In order to address the above problem, the present invention proposes a kind of motherboard, is applied to different power supply units.Power supply unit provides supply-voltage source to give motherboard.Motherboard comprises power control circuit and expansion card slot.Power control circuit comprises that comparer, generating circuit from reference voltage, power termination, interface voltage and current potential determine resistance.Comparer has the first comparison input end, the second relatively input end and relatively output terminal.Generating circuit from reference voltage is coupled to second and compares input end, and output one reference voltage.Power termination has control end and power take-off, and wherein power take-off is coupled to supply-voltage source, and control end is coupled to comparison output terminal.Current potential determines that resistance is coupled to interface voltage.Expansion card slot electrically plugs for expansion board, and has status pin and be coupled to current potential and determine resistance and the first comparison input end.Wherein, status pin is coupled in interface voltage normally, makes the voltage of status pin between interface voltage and reference voltage, or equals interface voltage.Comparer is exported the first output voltage to power termination, to open power termination, and has additional supply of the output load of voltage source.And when expansion board is inserted in expansion card slot, expansion board determines that the voltage of status pin, not between interface voltage and reference voltage, is also not equal to interface voltage, and comparer is exported the second output voltage to power termination, to close power termination.
The present invention proposes again a kind of motherboard, is applied in computer system, and is applicable to the power supply unit of various tool different loads driving forces.Power supply unit provides supply-voltage source to give motherboard.Motherboard comprises Control Component and power termination.Control Component has open state output stitch.Power termination has control end and power take-off.Power take-off is coupled to supply-voltage source, and control end is coupled to open state output stitch.Wherein, when computer system is carried out boot-strap program code and transmitted start signal to Control Component, the open state output stitch of Control Component is exported the first output voltage to power termination according to start signal, to open power termination, and has additional supply of the output load of voltage source.And when computer system completes boot-strap program code, the open state output stitch of Control Component is exported the second output voltage to power termination, to close power termination.
The present invention more proposes a kind of method for managing power supply of motherboard, comprises the following steps:
Provide the power termination of supply-voltage source to motherboard with power supply unit.The generating circuit from reference voltage output reference voltage of motherboard.Whether the expansion card slot that judges motherboard with a comparer of motherboard plugs expansion board, if not, the voltage of one status pin of expansion card slot is between interface voltage and reference voltage, or equal interface voltage, comparer is exported the first output voltage to power termination, to open power termination, and have additional supply of the output load of voltage source; If so, the voltage that expansion board determines status pin, not between interface voltage and reference voltage, is also not equal to interface voltage, and comparer is exported the second output voltage to power termination, to close power termination.
The present invention proposes a kind of mainboard power supply management method in addition, is applied to computer system.Method for managing power supply comprises the following steps:
Provide the power termination of supply-voltage source to motherboard with power supply unit.Start computer system and carry out boot-strap program code, and transmit the Control Component of start signal to motherboard.The open state output stitch of Control Component is exported the first output voltage to power termination according to start signal, to open power termination, and has additional supply of the output load of voltage source.When computer system completes boot-strap program code, the open state output stitch of Control Component is exported the second output voltage to power termination, to close power termination.
Effect of the present invention is, by the control circuit on motherboard and method for managing power supply thereof, in the time that the output load of supply-voltage source may be too low, its extra output load is provided, and closed under the behaviour in service that does not need extra output load, therefore make supply-voltage source can normally work under various states, can be suitable for different electrical power supply and make to include motherboard of the present invention, can take into account again the efficiency optimization of system power simultaneously.
About feature of the present invention, implementation and effect, hereby coordinate to be graphicly described in detail as follows as most preferred embodiment.
[accompanying drawing explanation]
Below in conjunction with drawings and embodiments, the present invention is further detailed explanation.
Fig. 1 is the block schematic diagram of the motherboard of first embodiment of the invention.
Fig. 2 is the power management process flow diagram of the motherboard of first embodiment of the invention.
Fig. 3 is the circuit diagram of the generating circuit from reference voltage of the motherboard of first embodiment of the invention.
Fig. 4 is the circuit diagram of the power termination of the motherboard of first embodiment of the invention.
Fig. 5 is the block schematic diagram of the motherboard of second embodiment of the invention.
Fig. 6 is the power management process flow diagram of the motherboard of second embodiment of the invention.
Fig. 7 is the block schematic diagram of the motherboard of third embodiment of the invention.
Fig. 8 is the method for managing power supply process flow diagram of the motherboard of third embodiment of the invention.
Fig. 9 is the block schematic diagram of the motherboard of fourth embodiment of the invention.
Figure 10 is the method for managing power supply process flow diagram of the motherboard of fourth embodiment of the invention.
Figure 11 is the circuit diagram of the voltage quasi position change-over circuit of the motherboard of fourth embodiment of the invention.
Primary clustering symbol description:
100,200,400,500 motherboard 110 comparers
111 first compare relatively input end of input end 112 second
113 compare output terminal 120 generating circuit from reference voltage
121 reference voltage 130 power terminations
131 control end 132 power take-offs
140 expansion card slot 141 status pin
150 current potentials determine resistance 160 supply-voltage sources
170 interface voltage 180 control circuit activation switches
185 decapacitation voltage 190 activation control ends
195 power control circuit 210 first reference resistances
220 second reference resistance 230 earth terminals
310 power resistor 320 switch modules
410 Control Component 411 open state output stitch
510 voltage quasi position change-over circuit 511 input ends
512 output terminal 610 level transfer resistances
620 level switches
[embodiment]
In the middle of instructions and follow-up claims, couple a word and include directly any and be indirectly electrically connected means at this.Therefore, be coupled to one second device if describe a first device in literary composition, represent that first device can directly be electrically connected in the second device, or be indirectly electrically connected to the second device through other device or connection means.In addition, positive signal is the state of a Digital Logic signal, or to can be regarded as general Digital Logic signal state be 1, and anti-phase signal is the state of another Digital Logic signal, or to can be regarded as general Digital Logic signal state be 0.
Fig. 1 is the block schematic diagram of the disclosed motherboard 100 of first embodiment of the invention.Motherboard 100 is applied among a computer installation, and be applicable to the power supply unit (not shown) of different loads driving force, and this power supply unit provides supply-voltage source 160 to motherboard 100, for example provide the voltage source output of positive 12 volts, for motherboard 100 and plug assembly thereon and use as Winchester disk drive, the required power supply of expansion board.Motherboard 100 includes a power control circuit 195 and an expansion card slot 140, and power control circuit 195 includes comparer 110, generating circuit from reference voltage 120, power termination 130, current potential decision resistance 150 and interface voltage 170.
As shown in Figure 1, comparer 110 has the first comparison input end 111, the second relatively input end 112 and relatively output terminal 113.The voltage that is wherein less than the second comparison input end 112 when the voltage of the first comparison input end 111, comparer 110 is exported the first output voltage; And the voltage of working as the first comparison input end 111 is greater than the voltage of the second comparison input end 112, comparer 110 is exported the second output voltage.
Generating circuit from reference voltage 120 is coupled to second of comparer 110 and compares input end 112, in order to output reference voltage 121, and the voltage reference bit standard comparing using comparer 110 in the present embodiment.
Current potential determines that one end of resistance 150 is coupled to interface voltage 170, and the other end is coupled to expansion card slot 140.As shown in Figure 1, expansion card slot 140 plugs for an expansion board, for example, provide the expansion board such as display card or internal memory electrically to plug wherein.Expansion card slot 140 has a status pin 141, and it is coupled to first of comparer 110 and compares input end 111, and current potential determines that resistance 150 is coupled to the status pin 141 of expansion card slot 140.In addition, expansion card slot 140 can be to show drawing array (video graphic array, VGA) expansion card slot of display card, or support quick peripheral hardware interconnect standard (peripheral component interconnect express, PCI-E) expansion card slot, but not as limit.
Fig. 2 is the power management process flow diagram of the motherboard of first embodiment of the invention, the operation of narrating its control circuit at the block schematic diagram of the motherboard 100 shown in this cooperation Fig. 1 is as follows: as shown in step 250, provide the power termination of supply-voltage source to motherboard with power supply unit.As shown in step 260, comparer judges whether the expansion card slot of motherboard plugs expansion board, if not,, as shown in step 270, the voltage of the status pin of expansion card slot is between interface voltage and reference voltage, and wherein the voltage of status pin is different from reference voltage, and level off to or equal interface voltage, now comparer is exported the first output voltage to power termination, to open power termination, and has additional supply of the output load of voltage source; If so, as shown in step 280, the voltage of expansion board set condition stitch, not between interface voltage and reference voltage, is namely not equal to interface voltage, and now comparer is exported the second output voltage to power termination, to close power termination.
Illustrate, if interface voltage 170 is greater than reference voltage 121, in the time that expansion board is not inserted in expansion card slot 140, status pin 141 determines that via current potential resistance 150 is coupled to interface voltage 170, and produce a magnitude of voltage that is greater than reference voltage 121 in status pin 141, now comparer 110 is exported the control end 131 of the first output voltage to power termination 130 after relatively, to open power termination 130, that is provides an extra output load to give supply-voltage source 160.Otherwise, in the time that expansion board is inserted in expansion card slot 140, expansion board is by the voltage of set condition stitch 141, and produce a voltage that is less than reference voltage 121 in status pin 141, now comparer 110 is exported the control end 131 of the second output voltage to power termination 130 after relatively, to close power termination 130, that is can not cause the extra output load of supply-voltage source 160.
Separately lift again an example explanation, in other embodiments of the invention, also can be the state that interface voltage 170 is set as being less than reference voltage 121, therefore in the time that expansion board is not inserted in expansion card slot 140, status pin 141 determines that via current potential resistance 150 is coupled to interface voltage 170, and produce a voltage that is less than reference voltage 121 in status pin 141, now comparer 110 is exported the control end 131 of the first output voltage to power termination 130 after relatively, to open power termination 130, that is provide an extra output load to give supply-voltage source 160; Otherwise, in the time that expansion board is inserted in expansion card slot 140, expansion board is by the voltage of set condition stitch 141, make status pin 141 produce a voltage that is greater than reference voltage 121, now comparer 110 is exported the control end 131 of the second output voltage to power termination 130 after relatively, to close power termination 130, that is can not cause the extra output load of supply-voltage source 160.
Effect of the present embodiment is; in the time that expansion board is not inserted in motherboard 100; the output load that prevents supply-voltage source 160 is too low; and cause power supply unit malfunction; the action that even starting protection mechanism is closed automatically, and then the problem that computer installation cannot normally use is occurred.And in the time that expansion board is inserted in motherboard 100, power control circuit 195 can't form unnecessary output load on supply-voltage source 160, provides efficiency therefore power supply unit can be brought into play best power supply.
Therefore, the state that whether is inserted in motherboard 100 according to expansion board determines whether providing an extra output load to give supply-voltage source 160, not only make the supply-voltage source 160 of power supply unit can normally work under various states, also in the optimization of the system power of computer installation, average out a little, the load that the supply-voltage source 160 of power supply unit is exported all belongs to autotelic output, but not invalid waste.
In addition, as shown in Figure 3, in the present invention, generating circuit from reference voltage 120 can include the first reference resistance 210 and the second reference resistance 220.The first reference resistance 210 is coupled between interface voltage 170 and reference voltage 121, and the second reference resistance 220 is coupled between reference voltage 121 and earth terminal 230.As previously mentioned, reference voltage 121 is the voltage reference bit standard that device 110 compares as a comparison.For example, in the time that expansion board is inserted in expansion card slot 140, the voltage system of status pin 141 sets via the interlock circuit on expansion board, for example, status pin 141 is connected to earth terminal 230 both voltages are equated; And in the time that expansion board is not inserted in expansion card slot 140, the voltage system of status pin 141 determines the coupling of resistance 150 via current potential and forms, for example, makes the voltage of status pin 141 equal interface voltage 170.In addition, because reference voltage 121 is to be formed with the first reference resistance 210 and the second reference resistance 220 dividing potential drops by interface voltage 170, therefore can learn via the comparative result of comparer 110 state that plugs of expansion board.
In addition, because reference voltage 121 is determined by the dividing potential drop of the first and second reference resistance 210,220, therefore can consider in different circuit operation situations, arround the difference of noise size, as plugged expansion board with respect to the situation that does not plug expansion board, carry out optimized design.For example, in the time that expansion board is inserted in the expansion card slot 140 of motherboard 100, may cause power control circuit 195 larger arround noise, now the voltage of status pin 141 is the voltage of earth terminal 230 again, therefore can be designed to be greater than with reference to voltage 121 half of interface voltage 170, to make the input difference of comparer 110 larger, that is there is good inhibition ability for noise, to ensure that comparer can obtain preferably comparative result.
Fig. 4 is the circuit diagram of the power termination 130 of the disclosed motherboard 100 of first embodiment of the invention.In the present embodiment, power termination 130 can include power resistor 310 and switch module 320.Power resistor 310 is connected in series with the passage of switch module 320, and is coupled between power take-off 132 and earth terminal 230.The control end of switch module 320 is the control end 131 of power termination 130.When switch module 320 receives the first output voltage and conducting, power resistor 310 forms an output load between supply-voltage source 160 and earth terminal 230, for example supply-voltage source 160 is positive 12 volts, and power resistor 310 is 24 nurses difficult to understand, in the time of switch module 320 conducting, the electric current on it is 0.5 ampere.Be noted that now power resistor 310, by the power that consumes 6 watts, therefore needs to consider its power consumption, and realizes power resistor 310 can tolerate the resistance of high power consumption, for example cement resistor.
Fig. 5 is the block schematic diagram of the motherboard 200 of second embodiment of the invention.Difference between the disclosed motherboard 100 of the motherboard 200 of the present embodiment and the first embodiment is, the disclosed motherboard 200 of second embodiment of the invention further comprises control circuit activation switch 180, decapacitation voltage 185 and activation control end 190.The passage of control circuit activation switch 180 is coupled between the comparison output terminal 113 and decapacitation voltage 185 of comparer 110, and control circuit activation switch 180 includes an assembly control end, and it is coupled to activation control end 190.
Fig. 6 is the power management process flow diagram of the motherboard of second embodiment of the invention.Coordinate the calcspar of the motherboard 200 shown in Fig. 5 to narrate the operation of its power control circuit 195 as follows, wherein step 650,660,670,680 is corresponding in Fig. 2, the step 250,260,270,280 of the first embodiment, and both are roughly the same, do not repeat them here.
In the second embodiment of the present invention, as shown in step 652, judge whether motherboard sends decapacitation control signal in activation control end, if, as shown in step 654, the passage conducting of control circuit activation switch, and activation control end is coupled to decapacitation voltage via control circuit activation switch, and power termination is closed normally; If not, that is activation control end receives the activation control signal that motherboard sends, the passage of control circuit activation switch cut-off, and proceed the motion flow after step 660, be the unlatching of power termination and close the voltage of being exported by comparer and determine, it can be with reference to explanation relevant to Fig. 2 in the first embodiment.Wherein, described activation control signal and decapacitation control signal, can utilize bouncing pilotage (jump) circuit, microprocessor or microcontroller on motherboard, carries out the setting of hardware mode or software mode
As shown in Figure 5, in the second embodiment of the present invention, the configuration purpose of control circuit activation switch 180 and activation control end 190 is, whether the output that motherboard 200 can initiatively judge supply-voltage source 160 can malfunction in the time of load too low, for example, utilize and distinguish that the mode of identification symbol judges.Malfunction in the time that motherboard 200 judges that the output of supply-voltage source 160 can't be in load too low, now motherboard 200 can send decapacitation control signal in activation control end 190, and power termination 130 is closed normally, to avoid unnecessary power consumption; Otherwise, send activation control signal, make power termination 130 in time open or to close, guarantee the normal work of supply-voltage source 160.So, not only make supply-voltage source 160 can normally work under various states, also in the efficiency optimization of system power, average out a little, make the load that supply-voltage source 160 is exported all belong to autotelic output, but not random waste.
Fig. 7 is the block schematic diagram of the motherboard 400 of third embodiment of the invention.Fig. 8 is the method for managing power supply process flow diagram of the motherboard 400 of third embodiment of the invention.The disclosed motherboard 400 of third embodiment of the invention is applied among a computer system.Motherboard 400 includes Control Component 410 and power termination 130, wherein Control Component 410 has open state output stitch 411, and power termination 130 includes control end 131 and power take-off 132, control end 131 is coupled to Control Component 410, and power take-off 132 is coupled to the power source supply end 160 of power supply unit.The Control Component 410 of motherboard 400 is the open state according to computer system, the open and close of power ratio control load 130.
The method for managing power supply that hereby coordinates the motherboard 400 of the block schematic diagram key diagram 8 of the motherboard 400 shown in Fig. 7, includes following steps: as shown in step 810, provide the power termination 130 of supply-voltage source 160 to motherboard 400 with power supply unit.As shown in step 830, start computer system and carry out boot-strap program code, and transmit the Control Component 410 of start signal to motherboard.As shown in step 850, the open state output stitch 411 of Control Component 410 is exported the first output voltage to power termination 130 according to start signal, to open power termination 130, and have additional supply of the output load of voltage source 160, wherein Control Component 410 can be the operand part such as microcontroller (microcontroller) or South Bridge chip group common on general motherboard, but not as limit.Then, as shown in step 870, judge whether computer installation has completed boot-strap program code, if so, as shown in step 890, the open state output stitch 411 of Control Component 410 is exported the second output voltage to power termination 130, to close power termination 130; If not, get back to the motion flow of step 850.
Effect of the present embodiment is; prevent that computer system is in the time carrying out boot-strap program code; for supply-voltage source 160; may have the too low situation of output load; and cause supply-voltage source 160 malfunctions and action that even starting protection mechanism is closed automatically, cause computer system normally to use.Therefore, utilize the open and close of open state output stitch 411 according to the open state power ratio control load 130 of computer system, and provide extra output load to supply-voltage source 160 according to this, also even computer installation does not complete start, power termination 130 provides an extra output load to give supply-voltage source 160, and when computer installation has completed start, Control Component 410 closes power termination 130, so not only make supply-voltage source 160 can normally work under various states, also in the efficiency optimization of system power, average out a little, make the load that supply-voltage source 160 is exported all belong to autotelic output, but not invalid waste.
Fig. 9 is the block schematic diagram of the motherboard 500 of disclosed the 4th embodiment of the present invention.The present embodiment and the disclosed motherboard of the 3rd embodiment are structurally roughly the same, difference is between the two, the disclosed motherboard of the 3rd embodiment further comprises voltage quasi position change-over circuit 510, it has input end 511 and output terminal 512, input end 511 is coupled to the open state output stitch 411 of Control Component, and output terminal 512 is connected in the control end 131 of power termination 130.Voltage quasi position change-over circuit 510 is the predetermined voltage level that the logic voltage level in order to open state is exported to stitch 411 is converted to control end 131, for example, be the voltage of supply-voltage source 160.For example, open state output stitch 411 is universal input and output (the general purpose input output with microcontroller, GPIO) stitch is realized, its logic voltage level may be 3.3 volts, and switch module in power termination 130 system realizes with a N-type metal oxide semiconductor field effect transistor (N-MOSFET), and its withstand voltage demand that meets supply-voltage source 160.Due to the possibly switch module conducting that cannot effectively make power termination 130 of the voltages of 3.3 volts, and the output load that causes power termination 130 to form reduces, affect effect that institute of the present invention wish produces, therefore can utilize voltage quasi position change-over circuit 510 level of 3.3 volts to be converted to the voltage of supply-voltage source 160, the for example predetermined voltage level of positive 12 volts, to effectively by switch module conducting, the effect producing to bring into play institute of the present invention wish.
Figure 10 is the method for managing power supply process flow diagram of the motherboard 500 of disclosed the 4th embodiment of the present invention.Hereby coordinate the calcspar of the disclosed motherboard 500 of Fig. 9 to illustrate that the method for managing power supply of Figure 10 is as follows.Wherein, step 1010,1030 can be with reference to the step 810 of the 3rd embodiment in figure 8,830 related description.Then, as shown in step 1050, the open state output stitch 411 of Control Component 410 is exported the first output voltage according to start signal, and be converted to predetermined voltage level to power termination 130 via voltage quasi position change-over circuit 510, to open power termination 130, and have additional supply of the output load of voltage source 160.Then, as shown in step 1070, judge whether computer installation has completed boot-strap program code, if,, as shown in step 1090, the open state output stitch 411 of Control Component 410 is exported the second output voltage, and is converted to after predetermined voltage level via voltage quasi position change-over circuit 510, be sent to power termination 130, to close power termination 130; If not, get back to the motion flow of step 1050.
As shown in figure 11, in the disclosed motherboard 500 of fourth embodiment of the invention, voltage quasi position change-over circuit 510 can include level transfer resistance 610 and level switch 620, and level transfer resistance 610 is connected in series with the passage of level switch 620, and is coupled between supply-voltage source 160 and earth terminal 230.The control end of level switch 620 is the input end 511 of voltage quasi position change-over circuit 510.Illustrate, level switch 620 is to realize with a N-type metal oxide semiconductor field effect transistor, when input end 511 is 3.3 volts, also while being the positive signal 1 of 3.3 volts of logic levels, 620 conductings of level switch, output terminal 512 is the voltage of earth terminal 230, is also 0 volt; Be 0 volt and work as input end 511, while being also the anti-phase signal 0 of 3.3 volts of logic levels, level switch 620 ends, and output terminal 512 is the voltage of supply-voltage source 160, for example, be positive 12 volts.
It should be noted that, with the angle of logical circuit, voltage quasi position change-over circuit 510 has been realized the function of a phase inverter, precisely because input end 511 is different from the logic voltage level of output terminal 512, therefore with the third embodiment of the present invention and the 4th embodiment comparison, wish is controlled identical power termination 130, and the logic of open state output stitch 411 its outputs of two embodiment must be anti-phase each other.But if add a phase inverter in the voltage quasi position change-over circuit 510 of the 4th embodiment, the output logic of the open state of two embodiment output stitch 411 can be homophase signal.Therefore, above lifted each embodiment, only illustrate as of the present invention, not in order to limit enforcement aspect of the present invention, this area has knows the knowledgeable conventionally, all can, according to the actual demand in circuit design, change design for each component part of control circuit, and not depart from the disclosed spirit of the present invention.
Effect of the present invention is, by the control circuit on motherboard and control method thereof, the output load of supply-voltage source may be too low in, its extra output load is provided, and closed under the behaviour in service that does not need extra output load, therefore make power supply unit can normally work under various states, and make the disclosed motherboard of the present invention all can be applicable to different electrical power supply, can take into account again the efficiency optimization of system power simultaneously.
Although embodiments of the invention disclose as mentioned above; so not in order to limit the present invention; anyly have the knack of related art techniques person; without departing from the spirit and scope of the present invention; such as work as and can do a little change according to shape, structure, feature and quantity described in the present patent application scope, therefore scope of patent protection of the present invention must be as the criterion depending on this instructions appending claims person of defining.
Claims (16)
1. a motherboard, is applied to the power supply unit of different loads driving force, and described power supply unit provides a supply-voltage source to give described motherboard, it is characterized in that, described motherboard includes:
One power control circuit, includes:
One comparer, has one first and compares relatively relatively output terminal of input end and of input end, one second;
One generating circuit from reference voltage, is coupled to described second and compares input end, and output one reference voltage;
One power termination, has a control end and a power take-off, and wherein said power take-off is coupled to described supply-voltage source, and described control end is coupled to described relatively output terminal;
One interface voltage; And
One current potential determines resistance, is coupled to described interface voltage; And
One expansion card slot, confession one expansion board electrically plugs, and described expansion card slot has a status pin, and described status pin is coupled to the first comparison input end of described current potential decision resistance and described comparer;
Wherein, described status pin is coupled in described interface voltage normally, and the voltage of described status pin is between described interface voltage and described reference voltage, and be different from described reference voltage, described comparer output one first output voltage is to described power termination, to open described power termination, and increase the output load of described supply-voltage source; And when described expansion board is inserted in described expansion card slot, described expansion board is set the voltage of described status pin not between described interface voltage and described reference voltage, described comparer output one second output voltage is to described power termination, to close described power termination.
2. motherboard as claimed in claim 1, its characteristic is, described interface voltage is greater than described reference voltage, make in the lump the voltage of described status pin be greater than described reference voltage, described comparer is exported described the first output voltage to described power termination, and when described expansion board is inserted in described expansion card slot, the voltage of described status pin is less than described reference voltage, described comparer is exported described the second output voltage to described power termination.
3. motherboard as claimed in claim 1, its characteristic is, described interface voltage is less than described reference voltage, make to be in the lump less than described reference voltage when the voltage of described status pin, described comparer is exported described the first output voltage to described power termination, and when described expansion board is inserted in described expansion card slot, the voltage of described status pin is greater than described reference voltage, described comparer is exported described the second output voltage to described power termination.
4. motherboard as claimed in claim 1, its characteristic is, described generating circuit from reference voltage includes one first reference resistance and one second reference resistance, described the first reference resistance is coupled between described interface voltage and described reference voltage, and described the second reference resistance is coupled between described reference voltage and an earth terminal.
5. motherboard as claimed in claim 1, its characteristic is, the voltage of described status pin equals described interface voltage normally, and is inserted in described expansion card slot when described expansion board, and the voltage of described status pin equals the voltage of the earth terminal of described motherboard.
6. motherboard as claimed in claim 1, its characteristic is, described power termination also includes a power resistor and a switch module, described power resistor is coupled between a passage of described supply-voltage source and this switch module, described passage is coupled between described power resistor and an earth terminal, when described comparer is exported described the first output voltage to passage described in described power termination conducting, to open described power termination, and export described the second output voltage to described power termination when described comparer and end described passage, described power termination is closed.
7. motherboard as claimed in claim 1, its characteristic is, also include a control circuit activation switch, one decapacitation voltage and an activation control end, described control circuit activation switch is coupled to the comparison output terminal of described comparer, between described decapacitation voltage and described activation control end, and described control end is coupled to described decapacitation voltage via described control circuit activation switch, described power termination is closed normally, and work as the passage that described activation control end ends described control circuit activation switch, the unlatching of described power termination and close the voltage of being exported by described comparer and determine.
8. a motherboard, is applied in a computer system, and is applicable to the power supply unit of different loads driving force, and described power supply unit provides a supply-voltage source to give described motherboard, it is characterized in that, described motherboard includes:
One Control Component, has an open state output stitch; And
One power termination, has a control end and a power take-off, and described power take-off is coupled to described supply-voltage source, and described control end is coupled to described open state output stitch;
Wherein, when described computer system is carried out a boot-strap program code and transmitted a start signal to described Control Component, the open state output stitch of described Control Component is according to the extremely described power termination of described start signal output one first output voltage, to open described power termination, and increase the output load of described supply-voltage source, and when described computer system completes described boot-strap program code, open state output stitch output one second output voltage of described Control Component is to described power termination, to close described power termination.
9. motherboard as claimed in claim 8, its characteristic is, described Control Component is a microcontroller chip or a South Bridge chip group.
10. motherboard as claimed in claim 8, its characteristic is, described power termination also includes a power resistor and a switch module, described power resistor is coupled between described supply-voltage source and one end of described switch module passage, the passage of described switch module is coupled between described power resistor and an earth terminal, the assembly control end of described switch module is coupled to described control end, when described open state output stitch is exported described the first output voltage to described power termination, the passage conducting of described switch module, to open described power termination, and when described open state output stitch is exported described the second output voltage to described power termination, the passage cut-off of described switch module, described power termination is closed.
11. motherboards as claimed in claim 8, its characteristic is, also includes a voltage quasi position change-over circuit, includes an input end and an output terminal; Described input end is connected in the open state output stitch of described Control Component, and described output terminal is connected in the control end of described power termination, in order to the logic voltage level of described open state output stitch is converted to the predetermined voltage level of described control end.
12. motherboards as claimed in claim 11, its characteristic is, described voltage quasi position change-over circuit also includes a level transfer resistance and position conversion switch surely, described level transfer resistance is coupled between described supply-voltage source and the output terminal of described voltage quasi position change-over circuit, the passage of described level switch is coupled between the output terminal and an earth terminal of described voltage quasi position change-over circuit, and the assembly control end of described level switch is coupled to the input end of described voltage quasi position change-over circuit.
The method for managing power supply of 13. 1 kinds of motherboards, its characteristic is, includes following steps:
Provide the power termination of a supply-voltage source to described motherboard with a power supply unit;
One generating circuit from reference voltage of described motherboard is exported a reference voltage; And
Whether an expansion card slot that judges described motherboard with a comparer of described motherboard plugs an expansion board;
If not, the voltage of one status pin of described expansion card slot is between described interface voltage and described reference voltage, and be different from described reference voltage, described comparer output one first output voltage is to described power termination, to open described power termination, and increase the output load of described supply-voltage source
If so, the voltage that described expansion board is set described status pin is not between described interface voltage and described reference voltage, and described comparer output one second output voltage is to described power termination, to close described power termination.
The method for managing power supply of 14. motherboards as claimed in claim 13, its characteristic is, also includes following steps:
If the passage conducting of one of described motherboard control circuit activation switch, one of described power termination control end is coupled to a decapacitation voltage, closes to described power termination normality; And
If the cut-off of the passage of the described control circuit activation switch of described motherboard, the voltage that the control end voltage of described power termination is exported by comparer determines, to set the unlatching of described power termination or to close.
The method for managing power supply of 15. 1 kinds of motherboards, is applied to a computer system, and its characteristic is, described method for managing power supply includes following steps:
Provide the power termination of a supply-voltage source to described motherboard with a power supply unit;
Start described computer system and carry out a boot-strap program code, and transmit the Control Component of a start signal to described motherboard;
One open state output stitch of described Control Component to described power termination, to open described power termination, and increases the output load of described supply-voltage source according to described start signal output one first output voltage; And
When described computer system completes described boot-strap program code, open state output stitch output one second output voltage of described Control Component is to described power termination, to close described power termination.
16. method for managing power supply as claimed in claim 15, its characteristic is, described the first output voltage and described the second output voltage are converted to a predetermined voltage level via a voltage quasi position change-over circuit, then export described power termination to.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW101150667 | 2012-12-27 | ||
| TW101150667A TWI459189B (en) | 2012-12-27 | 2012-12-27 | Motherboard and power management method thereof |
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| CN103901959A true CN103901959A (en) | 2014-07-02 |
| CN103901959B CN103901959B (en) | 2018-03-20 |
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| TW (1) | TWI459189B (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| TW201426273A (en) | 2014-07-01 |
| TWI459189B (en) | 2014-11-01 |
| CN103901959B (en) | 2018-03-20 |
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