CN103034316A - Power control system and method - Google Patents
Power control system and method Download PDFInfo
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- CN103034316A CN103034316A CN2011102968051A CN201110296805A CN103034316A CN 103034316 A CN103034316 A CN 103034316A CN 2011102968051 A CN2011102968051 A CN 2011102968051A CN 201110296805 A CN201110296805 A CN 201110296805A CN 103034316 A CN103034316 A CN 103034316A
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Abstract
A power control system comprises a power supply which provides direct current input voltage, a time schedule controller, at least one voltage conversion circuit and a power protection chip. The time schedule controller is connected with the power supply and the voltage conversion circuit. The time schedule controller is used for sending out an enable signal to the voltage conversion circuit after a period of start-up time. The voltage conversion circuit is connected with the power supply and the time schedule controller and is used for transferring the input voltage to operating voltage after receiving the enable signal. The power protection chip is used for sensing the output voltage values of the voltage conversion circuit, comparing whether the he output voltage values of the voltage conversion circuit is equal to the input voltage values and controlling the opening and closing of the power supply. When the he output voltage values of the voltage switching circuit is equal to the input voltage values, the power protection chip closes the power supply. The invention further provides a power control method.
Description
Technical field
The present invention relates to power control system and method, particularly, relate to a kind of power control system and method that is applied to computing machine.
Background technology
Computing machine generally includes a power supply unit (power supply unit, PSU), a time schedule controller and at least one voltage conversion circuit.PSU is used for an alternating voltage is converted to the input voltage of a direct current and offers voltage conversion circuit.Time schedule controller is connected to PSU and by the PSU power supply, time schedule controller also is connected to voltage conversion circuit and is used for sending an enable signal (enable signal) to voltage conversion circuit.Voltage conversion circuit is connected to PSU and time schedule controller, and the input voltage that voltage conversion circuit is used for behind the reception enable signal PSU being provided further is converted to operating voltage.
Usually, time schedule controller sends enable signal to voltage transitions voltage again after need finishing startup through certain start-up time behind the power supply that reception PSU provides.If voltage conversion circuit is short-circuited, then can within the start-up time of time schedule controller, namely not receive the DC voltage that access PSU provides in the situation of enable signal and can't input voltage changed, at this moment, the voltage of voltage conversion circuit output equals input voltage, causes voltage conversion circuit within the start-up time of time schedule controller because the overtension of exporting continues damaged.
Summary of the invention
In view of this, be necessary to provide in fact a kind of prevent within the start-up time of time schedule controller, continuing when voltage conversion circuit is short-circuited impaired power control system and method.
A kind of power control system is applied to a computing machine, and described power control system comprises a power supply unit, time schedule controller, at least one voltage conversion circuit and a power protection chip.Described power supply unit is used for providing the input voltage of a direct current.Described time schedule controller is connected to described power supply unit and by described power supply unit power supply, described time schedule controller also is connected to voltage conversion circuit; Described time schedule controller is used for sending an enable signal to voltage conversion circuit after through one period start-up time.Described voltage conversion circuit is connected to power supply unit and described time schedule controller, and described voltage conversion circuit is converted to operating voltage with described input voltage after being used for receiving enable signal.Described power protection chip comprises a detecting unit, a comparing unit and a control module.Described detecting unit is connected to described voltage conversion circuit, is used for the magnitude of voltage of the described voltage conversion circuit output of detecting within described start-up time; Described comparing unit is connected to described detecting unit, and whether the magnitude of voltage that is used for more described voltage conversion circuit output equals the value of described input voltage and export comparative result; Described control module is connected to described comparing unit and described power supply unit, for controlling the unlatching of described power supply unit according to described comparative result or closing.When the magnitude of voltage of described voltage conversion circuit output equaled the value of described input voltage, described control module was closed described power supply unit.
A kind of power control method is applied to a computing machine, may further comprise the steps:
S1: open a power supply unit that is used for the input voltage of supply one direct current;
S2: powered to a time schedule controller by described power supply unit, described time schedule controller is used for sending an enable signal after finishing startup through one period start-up time;
S3: at least one voltage conversion circuit by described power supply unit power supply is provided, and described voltage conversion circuit is used for after receiving described enable signal described input voltage being converted to operating voltage;
S4: a power protection chip is provided, and whether the magnitude of voltage that is used for magnitude of voltage, the output of more described voltage conversion circuit of the described voltage conversion circuit output of detecting within the described opening time equals the value of described input voltage and controls the unlatching of described power supply unit or close;
S5: when the magnitude of voltage of described voltage conversion circuit output equaled the value of described input voltage, described power protection chip was closed described power supply unit.
With respect to prior art; when the magnitude of voltage of described voltage conversion circuit output equals the value of described input voltage; show that voltage conversion circuit is short-circuited, described power protection chip is closed described power supply unit and is made described voltage conversion circuit outage, prevents that voltage conversion circuit from being continued to damage.
Description of drawings
Fig. 1 is the structured flowchart of the power control system that provides of embodiment of the present invention.
Fig. 2 is the process flow diagram of the computer power supply control method that provides of embodiment of the present invention.
The main element symbol description
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311 |
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| The second voltage change-over |
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| Four- |
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| South Bridge |
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| Step | S1、S2、S3、S4、S5、S6 |
Following embodiment further specifies the present invention in connection with above-mentioned accompanying drawing.
Embodiment
See also Fig. 1, the power control system 100 that embodiment of the present invention provides is applied to a computing machine (not shown).Described power control system 100 comprises a power supply unit 10, a time schedule controller 20, first voltage conversion circuit 31, second voltage change-over circuit 32, a central processing unit 41 (central processing unit, CPU), a South Bridge chip 42 and a power protection chip 50.
Described power supply unit 10 is used for the alternating voltage of outside is converted into the input voltage of the available direct current of computing machine.For example, in the present embodiment, described power supply unit 10 is the input voltage that 220 volts alternating voltage is converted to 12 volts direct current with the amplitude of outside.
Described time schedule controller 20 is connected to described power supply unit 10 and is powered by described power supply unit 10.Described time schedule controller 20 is used for sending enable signal through after certain start-up time when described computer booting.Described time schedule controller 20 can be integrated in a baseboard management controller (base motherboard controller, BMC) of computing machine, also can be an independent chip.In the present embodiment, described time schedule controller 20 is integrated in described BMC.Be about 0.5 second to 1 second the start-up time of described time schedule controller 20.
Described the first voltage conversion circuit 31 comprises a first input end 311, second input end 312 and first output terminal 313.Described first input end 311 is connected to described power supply unit 10, so makes the described input voltage of described the first voltage conversion circuit 31 accesses.Described the second input end 312 is connected to described time schedule controller 20, so makes described the first voltage conversion circuit 31 receive the enable signal that described time schedule controller 20 sends.Described the first output terminal 313 is connected to described CPU41.Described the first voltage conversion circuit 31 is used for after receiving described enable signal described input voltage further being converted to direct current the first operating voltage and offering described CPU41.
Described second voltage change-over circuit 32 comprises the 3rd input end 321, a four-input terminal 322 and second output terminal 323.Described the 3rd input end 321 is connected to described power supply unit 10, so makes the described input voltage of described second voltage change-over circuit 32 accesses.Described four-input terminal 322 is connected to described time schedule controller 20, so makes described second voltage change-over circuit 32 receive the enable signal that described time schedule controller 20 sends.Described the second output terminal 323 is connected to described South Bridge chip 42.Described second voltage change-over circuit 32 is used for after receiving enable signal described input voltage further being converted to the second operating voltage of direct current and offering described South Bridge chip 42.In the present embodiment, described the first voltage conversion circuit 31, described second voltage change-over circuit 32 are pressure drop circuit (buck circuit).The value of described the first operating voltage is approximately 1.5 volts.The value of described the second operating voltage is approximately 3.3 volts.Be that described the first operating voltage, described the second operating voltage are all less than described input voltage.
Described power protection chip 50 comprises a detecting unit 51, a storage unit 52, a comparing unit 53 and a control module 54.Described detecting unit 51 is connected to respectively described the first output terminal 313 and the second output terminal 323 and detects respectively the magnitude of voltage of described the first output terminal 313 and the second output terminal 323.Described storage unit 52 stores the value of described input voltage, described the first operating voltage and described the second operating voltage.Described comparing unit 53 is used for the value whether more described the first output terminal 313 magnitudes of voltage equal the value of described the first operating voltage or equal described input voltage, when described the first output terminal 313 magnitudes of voltage equal the value of the first operating voltage, first comparative result of described comparing unit 53 outputs, when described the first output terminal 313 magnitudes of voltage equal the value of described input voltage, second comparative result of described comparing unit 53 outputs.Whether the magnitude of voltage that described comparing unit 53 also is used for more described the second output terminal 323 equals the value of described the second operating voltage or equals the value of described input voltage, when described the second output terminal 323 magnitudes of voltage equal the value of the second operating voltage, the 3rd comparative result of described comparing unit 53 outputs, when the magnitude of voltage of described the second output terminal 323 equals the value of described input voltage, the 4th comparative result of described comparing unit 53 outputs.Described control module 54 is connected to described comparing unit 53, is used for obtaining the comparative result of described comparing unit 53 outputs.Described control module 54 also is connected to described power supply unit 10, for controlling the unlatching of described power supply unit 10 according to the comparative result of described comparing unit 53 outputs or closing.
Particularly, when described computer booting, power supply unit 10 at first is unlocked, and described time schedule controller 20 is by described power supply unit 10 power supplies and finish startup after described start-up time, and following three kinds of situations can appear in this moment:
1, when described the first voltage conversion circuit 31 and second voltage change-over circuit all are not short-circuited, after starting, described time schedule controller 20 sends the first enable signal to described the first voltage conversion circuit 31 first, described the first voltage conversion circuit 31 receives behind described the first enable signal and described input voltage to be dropped to described the first operating voltage and by 313 outputs of described the first output terminal, described detecting unit 51 detects the magnitude of voltage of described the first output terminal 313, first comparative result of output is to described control module 54 described comparing unit 53 equals the value of described the first operating voltage through the magnitude of voltage of more described the first output terminal 313 after, and described control module 54 was controlled described power supply unit 10 according to described the first comparative result and continued to remain opening this moment.In addition, described the first voltage conversion circuit 31 is to power supply normal signal (POWER GOOD of described time schedule controller 20 feedbacks, the P.G signal), described time schedule controller 20 sends the second enable signal to described second voltage change-over circuit 32 again after receiving described P.G signal, after described second voltage change-over circuit 32 receives described the second enable signal described input voltage is converted to the second operating voltage, described detecting unit 51 detects the magnitude of voltage of described the second output terminal 323, the 3rd comparative result of output is to described control module 54 described comparing unit 53 equals the value of described the second operating voltage through the magnitude of voltage of more described the second output terminal 323 after, and control module 54 was controlled described power supply unit 10 according to described the 3rd comparative result and continued to remain opening this moment.
2, when described the first voltage conversion circuit 31 is short-circuited, second voltage change-over circuit 32 is not short-circuited, because described time schedule controller 20 sends the first enable signal to described the first voltage conversion circuit 31 again behind elapsed boot time, at this moment, described the first voltage conversion circuit 31 is directly exported described input voltage in the situation that does not receive described the first enable signal, described detecting unit 51 detects the magnitude of voltage of described the first output terminal 313, described comparing unit 53 equals the value of described input voltage and exports second comparative result to described control module 54 through the magnitude of voltage of more described the first output terminal 313, and this moment, control module 54 was closed described power supply unit 10 according to described the second comparative result.At this moment, described time schedule controller 20, described the first voltage conversion circuit 31 and described second voltage change-over circuit 32 are off-position.
3, when described the first voltage conversion circuit 31 is not short-circuited, when described second voltage change-over circuit 32 is short-circuited, since described time schedule controller 20 through start-up time backward described the first voltage conversion circuit 31 send the first enable signal, described second voltage change-over circuit 32 does not also receive at described the first voltage conversion circuit 31 in the situation of described the first enable signal described input voltage is directly exported, described detecting unit 51 detects the magnitude of voltage of described the second output terminal 323, described comparing unit 53 equals the value of described input voltage and exports the 4th comparative result to described control module 54 through the magnitude of voltage of more described the second output terminal 323, and described control module 54 is closed described power supply unit 10 according to described the 4th comparative result.At this moment, described time schedule controller 20, described the first voltage conversion circuit 31 and described second voltage change-over circuit 32 are off-position.
The quantity of the voltage conversion circuit of described power control system 100 is not limited to described the first voltage conversion circuit 31 and the second voltage change-over circuit 32 in the present embodiment, and described power control system 100 can comprise one or more voltage conversion circuit.
In the present embodiment, the value of the magnitude of voltage of described the first output terminal 313 and the first work is considered as the value that described the first output terminal 313 values equal described the first work when differing in 5%, the magnitude of voltage of described the first output terminal 313 and the value of described input voltage are considered as the value that described the first output terminal 313 values equal input voltage when differing in 5%.Same, the value of stating the magnitude of voltage of the second output terminal 323 and the second work is considered as described the second output terminal 323 values when differing in 5% and equals the second value of working, and the magnitude of voltage of described the second output terminal 323 and the value of described input voltage are considered as described the second output terminal 323 when differing in 5% magnitude of voltage equals the value of input voltage.
Compared with prior art; whether described power protection chip 50 is detected the voltage of described the first voltage conversion circuit 31 and described second voltage change-over circuit 32 outputs and more described the first voltage conversion circuit 31 and 32 outputs of described second voltage change-over circuit within described start-up time magnitude of voltage equals the value of described input voltage; when the magnitude of voltage of described the first voltage conversion circuit 31 or 32 outputs of described second voltage change-over circuit equals the value of described input voltage; show described the first voltage conversion circuit 31 or 32 short circuits of described second voltage change-over circuit, the described power supply unit 10 of described power protection chip 50 controls is closed and is made described the first voltage conversion circuit 31 and 32 outages of second voltage change-over circuit.As long as one of them of the first voltage conversion circuit 31 and second voltage change-over circuit 32 is short-circuited; described power supply unit 10 all will be closed by described power protection chip 50, prevent that with this first voltage conversion circuit 31 of short circuit or second voltage change-over circuit 32 from continuing damaged.
As shown in Figure 2, the present invention also provides a kind of power control method, is applied to a computing machine, may further comprise the steps:
S1: when described computer booting, open a power supply unit that is used for the input voltage of supply one direct current;
S2: utilize described power supply unit to power to a time schedule controller, described time schedule controller sends an enable signal after finishing startup through one period start-up time;
S3: at least one voltage conversion circuit by described power supply unit power supply is provided, and described voltage conversion circuit is converted to the input voltage of described direct current the operating voltage of a direct current behind the enable signal that the described time schedule controller of reception sends;
S4: a power protection chip is provided, and whether the magnitude of voltage that is used for magnitude of voltage, the output of more described voltage conversion circuit of the described voltage conversion circuit output of detecting within the described opening time equals the value of described input voltage and controls the unlatching of described power supply unit or close;
S5: when the magnitude of voltage of described voltage conversion circuit output equaled the value of described input voltage, described power protection chip was closed described power supply unit.
Further, described power control method is further comprising the steps of:
S6: when the magnitude of voltage of described voltage conversion circuit output equals the value of described operating voltage; the described power supply unit of described power protection chip controls remains opening, and described power protection chip continues the magnitude of voltage of the described voltage conversion circuit output of detecting.
Be understandable that those skilled in the art also can do other variation and wait for design of the present invention in spirit of the present invention, as long as it does not depart from technique effect of the present invention and all can.The variation that these are done according to spirit of the present invention all should be included within the present invention's scope required for protection.
Claims (8)
1. a power control system is applied to a computing machine, and described power control system comprises a power supply unit, time schedule controller, at least one voltage conversion circuit and a power protection chip; Described power supply unit is used for providing the input voltage of a direct current; Described time schedule controller is connected to described power supply unit and by described power supply unit power supply, described time schedule controller also is connected to described voltage conversion circuit; Described time schedule controller is used for sending an enable signal to voltage conversion circuit after through one period start-up time; Described voltage conversion circuit is connected to power supply unit and described time schedule controller, and described voltage conversion circuit is converted to operating voltage with described input voltage after being used for receiving enable signal; Described power protection chip comprises a detecting unit, a comparing unit and a control module; Described detecting unit is connected to described voltage conversion circuit, is used for the magnitude of voltage of the described voltage conversion circuit output of detecting within described start-up time; Described comparing unit is connected to described detecting unit, and whether the magnitude of voltage that is used for more described voltage conversion circuit output equals the value of described input voltage and export comparative result; Described control module is connected to described comparing unit and described power supply unit, for controlling the unlatching of described power supply unit according to described comparative result or closing; When the magnitude of voltage of described voltage conversion circuit output equaled the value of described input voltage, described control module was closed described power supply unit.
2. power control system as claimed in claim 1, it is characterized in that: described power protection chip also comprises a storage unit, is used for storing the value of described input voltage and the value of described operating voltage.
3. power control system as claimed in claim 2 is characterized in that: when the value of described voltage conversion circuit output equaled the value of described operating voltage, described control module was controlled described power supply unit and is continued to remain opening.
4. power control system as claimed in claim 2 is characterized in that: the magnitude of voltage of described voltage conversion circuit output is considered as the voltage that described voltage conversion circuit exports when differing in 5% with the value of operating voltage value equals the value of described operating voltage; The value of the voltage of described voltage conversion circuit output is considered as the value that magnitude of voltage that described voltage conversion circuit exports equals input voltage when differing in 5% with the value of described input voltage.
5. power control system as claimed in claim 1, it is characterized in that: described time schedule controller is integrated in a baseboard management controller of described computing machine.
6. power control system as claimed in claim 1, it is characterized in that: described voltage conversion circuit is the pressure drop circuit, and described operating voltage is less than described input voltage.
7. a power control method is applied to a computing machine, may further comprise the steps:
S1: open a power supply unit that is used for the input voltage of supply one direct current;
S2: utilize described power supply unit to power to a time schedule controller, described time schedule controller is used for sending an enable signal after finishing startup through one period start-up time;
S3: at least one voltage conversion circuit by described power supply unit power supply is provided, and described voltage conversion circuit is used for behind the enable signal that the described time schedule controller of reception sends described input voltage being converted to operating voltage;
S4: a power protection chip is provided, and whether the magnitude of voltage that is used for magnitude of voltage, the output of more described voltage conversion circuit of the described voltage conversion circuit output of detecting within the described opening time equals the value of described input voltage and controls the unlatching of described power supply unit or close;
S5: when the magnitude of voltage of described voltage conversion circuit output equaled the value of described input voltage, described power protection chip was closed described power supply unit.
8. power control method as claimed in claim 7 is characterized in that: further may further comprise the steps:
S6: when the magnitude of voltage of described voltage conversion circuit output equaled described operational voltage value, the described power supply unit of described power protection chip controls remained opening, and described power protection chip continues the magnitude of voltage of the described voltage conversion circuit output of detecting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102968051A CN103034316A (en) | 2011-09-30 | 2011-09-30 | Power control system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102968051A CN103034316A (en) | 2011-09-30 | 2011-09-30 | Power control system and method |
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| CN103034316A true CN103034316A (en) | 2013-04-10 |
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| CN2011102968051A Pending CN103034316A (en) | 2011-09-30 | 2011-09-30 | Power control system and method |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7694163B1 (en) * | 2006-12-14 | 2010-04-06 | Emc Corporation | System for generating and monitoring voltages generated for a variety of different components on a common printed circuit board |
| CN101727136A (en) * | 2008-10-17 | 2010-06-09 | 联想(北京)有限公司 | Method for protecting main board of computer, computer and constituent elements of computer |
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2011
- 2011-09-30 CN CN2011102968051A patent/CN103034316A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7694163B1 (en) * | 2006-12-14 | 2010-04-06 | Emc Corporation | System for generating and monitoring voltages generated for a variety of different components on a common printed circuit board |
| CN101727136A (en) * | 2008-10-17 | 2010-06-09 | 联想(北京)有限公司 | Method for protecting main board of computer, computer and constituent elements of computer |
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Application publication date: 20130410 |