CN101887299B - Power supply control circuit and control method of computer system - Google Patents
Power supply control circuit and control method of computer system Download PDFInfo
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- CN101887299B CN101887299B CN200910141606A CN200910141606A CN101887299B CN 101887299 B CN101887299 B CN 101887299B CN 200910141606 A CN200910141606 A CN 200910141606A CN 200910141606 A CN200910141606 A CN 200910141606A CN 101887299 B CN101887299 B CN 101887299B
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Abstract
The invention relates to a power supply control circuit of a computer system and a control method. The computer system is provided with the power supply control circuit of an embedded type controller; and the power supply control circuit comprises a voltage stabilizer, a detection control circuit and the embedded type controller, wherein the voltage stabilizer receives a first voltage and can be used for converting the first voltage into a working voltage of the embedded type controller when the voltage stabilizer is enabled; the detection control circuit is used for receiving the first voltage and judging a key signal, disabling the voltage stabilizer when the key signal is not subjected to an action, and continuing to enable the voltage stabilizer when the key signal is subjected to an action; the embedded type controller is connected to the voltage stabilizer and used for receiving the working voltage and outputting a plurality of power supply control signals; and the embedded type controller can also provide a power starting signal to the detection control circuit so as to ensure that the detection control circuit continuously enables the voltage stabilizer.
Description
Technical field
The present invention is about power control circuit and power control method in a kind of computer system, and particularly about power control circuit and the power control method of embedded controller in a kind of computer system (embedded controller).
Background technology
As everyone knows; (embedded controller EC) is used for carrying out the power management (power management) of computer system, the charging running (battery chargingoperation) of battery, the rotating speed Detection & Controling of radiator fan all to have an embedded controller in the computer system.Wherein, power management also comprises the power supply sequential control task when carrying out start with shutdown.
Because embedded controller is played the part of the task of power management in computer system, so must make in the design of computer system that embedded controller remains on the state of clear-headed (alive) forever.Even computer system has got into battery saving mode or shutdown, embedded controller still remains on the state of clear-headed (alive).Therefore, embedded controller must be supplied power by standby power (standby power), and standby power then is to be supplied by the battery of computer system.
Please with reference to Fig. 1, it is depicted as the power control circuit of embedded controller in the known electric brain system.The cell voltage V that battery provided
BatBe connected to a low dropout voltage regulator (REGULATOR) 10, produce the WV V of an embedded controller afterwards
ECTo embedded controller 20.And the WV V of embedded controller
ECBe standby power and be about 3V.
Moreover voltage stabilizer (REGULATOR) 10 has an activation pin position, and (enable pin EN), and is connected in cell voltage V with one first resistance R 1
BatAnd between the activation pin position EN.That is when the battery insertion computer system while, activation pin position EN is that high level makes voltage stabilizer (REGULATOR) 10 begin action, and the WV V of embedded controller is provided
ECTo embedded controller 20.And receive the WV V of embedded controller when embedded controller 20
ECThe time, embedded controller 20 be an exportable high level an electric power starting signal (power on signal, PW_ON).
And known embedded controller 20 also is connected to the power key (power button) of computer system, in order to receive a push button signalling (button signal).In general, when the user did not push power key, push button signalling was a high level; Otherwise when the user pushed power key, push button signalling was a low level, and the time of pushing is the low level duration.When embedded controller 20 detects push button signalling when being in low level, promptly produce a plurality of power control signals (power control signals) and come intrasystem other element of controlling computer to begin action.
Yet, when battery inserts in computer system, voltage stabilizer (regulator) 10 and the lasting consumed power of embedded controller 20 meetings, its standby current (quiescent current) is about 3～5mA.In other words, if computer system manufacturer is incorporated into shipment in the computer system with battery, through concluding the business the user after a while on hand the time, the residual amount of energy of battery possibly can't be opened computer system.
Summary of the invention
The objective of the invention is to propose the power control circuit and the power control method of embedded controller in a kind of computer system,, and make the energy content of battery of computer system keep the long time in order to the standby current of reduction computer system.
The present invention proposes the power control circuit of embedded controller in a kind of computer system, comprising: a voltage stabilizer receives to one first voltage, can be when voltage stabilizer be enabled be the WV of an embedded controller with first voltage transitions; One detects control circuit receives first voltage and judges a push button signalling, and forbidden energy voltage stabilizer when push button signalling does not move continues the activation voltage stabilizer when push button signalling moves; And an embedded controller is connected to the WV of voltage stabilizer in order to the reception embedded controller, and exports a plurality of power control signals; Wherein, embedded controller also can provide an electric power starting signal to detecting control circuit, makes that detecting control circuit continues this voltage stabilizer of activation.
The present invention also proposes the power control method of embedded controller in a kind of computer system, apply to a low pressure drop voltage stabilizing, detect control circuit, and an embedded controller between, this power control method comprises the following steps: to judge a push button signalling; When push button signalling did not move, the forbidden energy voltage stabilizer also made voltage stabilizer and embedded controller be failure to actuate; And when push button signalling moved, the activation voltage stabilizer also made WV that voltage stabilizer produces this embedded controller to embedded controller.
Description of drawings
In order to enable further clear understand characteristic of the present invention and technology contents, see also following about detailed description of the present invention and accompanying drawing, yet accompanying drawing only provides reference and explanation, is not to be used for the present invention is limited, wherein:
Shown in Figure 1 is the power control circuit of embedded controller in the known electric brain system.
Shown in Figure 2 is first embodiment of the power control circuit of embedded controller in the computer system of the present invention.
Shown in Figure 3 is second embodiment of the power control circuit of embedded controller in the computer system of the present invention.
Embodiment
Please with reference to Fig. 2, it is depicted as first embodiment of the power control circuit of embedded controller in the computer system of the present invention.The power control circuit of this embedded controller comprise one detect control circuit 130, a voltage stabilizer (REGULATOR) 110, with an embedded controller 120.According to the first embodiment of the present invention, voltage stabilizer (REGULATOR) 110 and embedded controller 120 neither can action when battery inserts computer system.And when the user pushed power key and makes that push button signalling produces low level, detecting control circuit 130 was the WV V of may command voltage stabilizer (REGULATOR) 110 output embedded controllers
ECTo embedded controller 120, and make a plurality of power control signals of embedded controller 120 generations come intrasystem other element of controlling computer to begin action.
As shown in Figure 2, the cell voltage that battery provided (Vbat) is connected to voltage stabilizer (REGULATOR) 110, and voltage stabilizer (REGULATOR) 110 has an activation pin position EN, and is connected between cell voltage Vbat and the activation pin position EN with one first resistance R 1.Moreover,, voltage stabilizer (REGULATOR) 110 can produce the WV V of an embedded controller after being enabled
ECTo embedded controller 120.And receive the WV V of embedded controller when embedded controller 120
ECThe time, an electric power starting signal PW_ON and a plurality of power control signal that embedded controller 120 can be exported a high level simultaneously come intrasystem other element of controlling computer to begin action.
Moreover, detect control circuit 130 also comprise a mu balanced circuit 132, a first transistor M1, a transistor seconds M2, one second resistance R 2, one the 3rd resistance R 3, a capacitor C, with a diode D.Wherein, comprise in the mu balanced circuit 132 a parallelly connected voltage adjuster (shunt regulator, SR), one the 4th resistance R 4, one the 5th resistance R 5, with one the 6th resistance R 6.Be connected the 4th resistance R 4 between the negative pole end of cell voltage (Vbat) and shunt voltage adjuster SR; The positive terminal of shunt voltage adjuster SR is connected to earth terminal; Be connected the 5th resistance R 5 between the negative pole end of shunt voltage adjuster SR and the reference edge; Be connected the 6th resistance R 6 between the positive terminal of shunt voltage adjuster SR and the reference edge.Therefore, mu balanced circuit 132 can convert cell voltage Vbat into an operating voltage Vcc.
The first transistor M1 drain electrode is connected to activation pin position EN; The first transistor M1 source electrode is connected to earth terminal.Transistor seconds M2 drain electrode is connected to the first transistor M1 grid; Transistor seconds M2 source electrode is connected to earth terminal; Be connected the 3rd resistance R 3 between transistor seconds M2 grid and the earth terminal, and transistor seconds M2 grid receives electric power starting signal PW_ON.Moreover diode D cathode terminal (cathode) receives push button signalling; Diode D anode tap (anode) is connected to the first transistor M1 grid.Be connected second resistance R 2 between the first transistor M1 grid and the operating voltage Vcc.Be connected capacitor C between the first transistor M1 grid and the earth terminal.
When the user did not push power key, push button signalling was a high level.Because the first transistor M1 grid is a high level, the first transistor M1 opens (turn on) and makes that activation pin position EN is a low level.Therefore, voltage stabilizer (REGULATOR) 110 can't move, and can't export the WV V of embedded controller
ECTo embedded controller 120.
When the user pushed power key, push button signalling was a low level.Because the first transistor M1 grid is a low level, the first transistor M1 closes (turn off) and makes that activation pin position EN is a high level.Therefore, voltage stabilizer (REGULATOR) 110 actions, and the WV V of output embedded controller
ECTo embedded controller 120.And embedded controller 120 can be exported electric power starting signal PW_ON and a plurality of power control signal of high level simultaneously and comes intrasystem other element of controlling computer to begin action.Moreover when transistor seconds M2 grid received the electric power starting signal PW_ON of high level, transistor seconds M2 opened (turn on) and makes the first transistor M1 grid maintain low level.At this moment, even if push button signalling returns back to the low level that high level can not change the first transistor M1 grid yet.
Can know that by the first embodiment of the present invention voltage stabilizer (REGULATOR) 110 and embedded controller 120 neither can actions only have the control circuit of detection 130 to move when battery inserts computer system.And detection control circuit 130 required standby currents of the present invention can significantly be reduced to 300～500 μ A.Therefore, can be so that the energy of battery be kept the long time.
In other words, after the user pushes power key, detect control circuit 130 and just can control voltage stabilizer (REGULATOR) 110 actions, and the WV V of output embedded controller
ECTo embedded controller 120, make embedded controller 120 produce a plurality of power control signals and come intrasystem other element of controlling computer to begin action.
Please with reference to Fig. 3, it is depicted as second embodiment of the power control circuit of embedded controller in the computer system of the present invention.The power control circuit of this embedded controller comprise one detect control circuit 230, a voltage stabilizer (REGULATOR) 210, with an embedded controller 220.According to a second embodiment of the present invention, voltage stabilizer (REGULATOR) 210 and embedded controller 220 neither can action when battery inserts computer system or transformer (adaptor) insertion.Moreover the embedded controller 220 among second embodiment must confirm earlier whether the user pushes power key when action.And when the user pushed power key and makes that push button signalling produces low level, detecting control circuit 230 was the WV V of may command voltage stabilizer (REGULATOR) 210 output embedded controllers
ECTo embedded controller 220, and make a plurality of power control signals of embedded controller 220 generations come intrasystem other element of controlling computer to begin action.
As shown in Figure 3; The transformer voltage Vadp that cell voltage Vbat or the transformer that battery provided provided can be connected to voltage stabilizer (REGULATOR) 210; And voltage stabilizer (REGULATOR) 210 has an activation pin position EN, and is connected between cell voltage/transformer voltage Vbat/Vadp and the activation pin position EN with one first resistance R 1.Moreover voltage stabilizer (REGULATOR) 210 can produce the WV V of an embedded controller when being enabled
ECTo embedded controller 220.And receive the WV V of embedded controller when embedded controller 220
ECThe time, embedded controller 220 must confirm earlier whether the user pushes power key.That is to say that when push button signalling was high level, electric power starting signal PW_ON maintained low level; Otherwise when push button signalling was low level, electric power starting signal PW_ON maintained high level and exports a plurality of power control signals and come intrasystem other element of controlling computer to begin action.
Moreover, detect control circuit 230 also comprise a mu balanced circuit 232, a first transistor M1, a transistor seconds M2, one the 3rd transistor M3, one the 4th transistor M4, one second resistance R 2, one the 3rd resistance R 3, one the 4th resistance R 4, one the 5th resistance R 5, one the 6th resistance R 6, one the 7th resistance R 7, one first capacitor C1, one second capacitor C2, one the 3rd capacitor C3, with a diode D.Wherein, comprise in the mu balanced circuit 232 a parallelly connected voltage adjuster (shunt regulator, SR), one the 8th resistance R 8, one the 9th resistance R 9, with 1 the tenth resistance R 10.Be connected the 8th resistance R 8 between the negative pole end of cell voltage/transformer voltage Vbat/Vadp and shunt voltage adjuster SR; The positive terminal of shunt voltage adjuster SR is connected to earth terminal; Be connected the 9th resistance R 9 between the negative pole end of shunt voltage adjuster SR and the reference edge; Be connected the tenth resistance R 10 between the positive terminal of shunt voltage adjuster SR and the reference edge.Therefore, mu balanced circuit 232 produces an operating voltage Vcc after can receiving cell voltage/transformer voltage Vbat/Vadp.
The first transistor M1 drain electrode is connected to activation pin position EN; The first transistor M1 source electrode is connected to earth terminal.Transistor seconds M2 drain electrode is connected to the first transistor M1 grid; Transistor seconds M2 source electrode is connected to earth terminal; Be connected the 3rd resistance R 3 between transistor seconds M2 grid and the earth terminal, and transistor seconds M2 grid receives electric power starting signal PW_ON.Moreover diode D cathode terminal (cathode) receives push button signalling; Diode D anode tap (anode) is connected to the first transistor M1 grid.Be connected second resistance R 2 between the first transistor M1 grid and the operating voltage Vcc.Be connected the first capacitor C1 between the first transistor M1 grid and the earth terminal.
The 3rd transistor M3 drain electrode is connected to the first transistor M1 grid; The 3rd transistor M3 source electrode is connected to earth terminal; Be connected the 5th resistance R 5 between the 3rd transistor M3 grid and the earth terminal.The second capacitor C2, first end is connected to cell voltage Vbat; Be connected the 4th resistance R 4 between the second capacitor C2, second end and the 3rd transistor M3 grid.The 4th transistor M4 drain electrode is connected to the first transistor M1 grid; The 4th transistor M4 source electrode is connected to earth terminal; Be connected the 7th resistance R 7 between the 4th transistor M4 grid and the earth terminal.The 3rd capacitor C3 first end is connected to transformer voltage Vadp; Be connected the 6th resistance R 6 between the 3rd capacitor C3 second end and the 4th transistor M4 grid.
Be not inserted in computer system moment when the user pushes power key and battery, voltage stabilizer (REGULATOR) 210, first resistance R 1, receive cell voltage Vbat with mu balanced circuit 232.At this moment, the 3rd transistor M3 opens (turn on), and the first transistor M1 grid is low level and closes (turn off), makes that activation pin position EN is a high level.Therefore, voltage stabilizer (REGULATOR) 210 actions, and the WV V of output embedded controller
ECTo embedded controller 220.And since this moment push button signalling be high level, so electric power starting signal PW_ON maintains low level.Therefore; The 4th resistance R 4, the 5th resistance R 5, with the formed charging circuit of the second capacitor C2 after after a while; Can cause the 3rd transistor M3 to close, make that the first transistor M1 grid is high level and unlatching (turn on), makes that activation pin position EN is a low level.At this moment, voltage stabilizer (REGULATOR) 210 is got back to non-action state once more with embedded controller 220.
Be not inserted in computer system moment when the user pushes power key and transformer, voltage stabilizer (REGULATOR) 210, first resistance R 1, with mu balanced circuit 232 receiving transformer voltage Vadp.At this moment, the 4th transistor M4 opens (turn on), and the first transistor M1 grid is low level and closes (turn off), makes that activation pin position EN is a high level.Therefore, voltage stabilizer (REGULATOR) 210 actions, and the WV V of output embedded controller
ECTo embedded controller 220.And since this moment push button signalling be high level, so electric power starting signal PW_ON maintains low level.Therefore; The 7th resistance R 7, the 6th resistance R 6, with the formed charging circuit of the 3rd capacitor C3 after after a while; Can cause the 4th transistor M4 to close, make that the first transistor M1 grid is high level and unlatching (turn on), makes that activation pin position EN is a low level.At this moment, voltage stabilizer (REGULATOR) 210 is got back to non-action state once more with embedded controller 220.
When the user pushed power key and transformer or battery and has been inserted in computer system, push button signalling was a low level.Because the first transistor M1 grid is a low level, the first transistor M1 closes (turn off) and makes that activation pin position EN is a high level.Therefore, voltage stabilizer (REGULATOR) 210 actions, and the WV V of output embedded controller
ECTo embedded controller 220.And since this moment push button signalling be low level, so embedded controller 220 is kept electric power starting signal PW_ON at high level.Therefore, embedded controller 220 is that exportable a plurality of power control signal comes intrasystem other element of controlling computer to begin action.And when transistor seconds M2 grid received the electric power starting signal PW_ON of high level, transistor seconds M2 opened (turn on) and makes the first transistor M1 grid maintain low level.At this moment, even if push button signalling returns back to the low level that high level can not change the first transistor M1 grid yet.
Can know by the second embodiment of the present invention, the action that voltage stabilizer (REGULATOR) 210 and embedded controller 220 can be of short duration when battery or transformer insert computer system, and confirm that the user does not have and get back to the state of being failure to actuate once more after pushing power key.Only have when confirming that the user pushes power key and just can move constantly.
Moreover detection control circuit 230 required standby currents of the present invention can significantly be reduced to 300～500 μ A.Therefore, can be so that the energy of battery be kept the long time.
In sum; Though the present invention discloses as above with preferred embodiment; Yet it is not in order to limiting the present invention, anyly is familiar with this operator, is not breaking away from the spirit and scope of the present invention; When can doing various changes that are equal to or replacement, so protection scope of the present invention is when looking being as the criterion that claims define.
Claims (6)
1. the power control circuit of embedded controller in the computer system is characterized in that, comprising:
Voltage stabilizer, it receives first voltage, the WV that when said voltage stabilizer is enabled, is embedded controller with said first voltage transitions;
Detect control circuit, it receives said first voltage and judges push button signalling, and said voltage stabilizer has activation pin position to be connected to said detection control circuit, and said detection control circuit also comprises:
Mu balanced circuit is an operating voltage with said first voltage transitions;
The first transistor, said the first transistor drain electrode is connected to said activation pin position, and said the first transistor source electrode is connected to earth terminal;
Second resistance is connected between said the first transistor grid and the said operating voltage;
Transistor seconds, said transistor seconds drain electrode is connected to said the first transistor grid, and said transistor seconds source electrode is connected to said earth terminal, and said transistor seconds grid receives the electric power starting signal;
The 3rd resistance is connected between said transistor seconds grid and the said earth terminal;
Diode, said diode cathode termination is received push button signalling, and said diode anode end is connected to said the first transistor grid;
Capacitor is connected between said the first transistor grid and the said earth terminal; And
Embedded controller, it is connected to said voltage stabilizer in order to receiving the WV of said embedded controller, and exports a plurality of power control signals;
Wherein, When said detection control circuit judges that said push button signalling is low level; Said the first transistor is closed and is made that said activation pin position is a high level, and said embedded controller receives said WV and exports said a plurality of power control signal, and said embedded controller also provides said electric power starting signal to said transistor seconds grid; Make said transistor seconds open, make said detection control circuit continue the said voltage stabilizer of activation.
2. the power control circuit of embedded controller in the computer system according to claim 1; It is characterized in that; Wherein, Said first voltage is the transformer voltage that cell voltage or transformer provided that battery provided, and said detection control circuit receives said first voltage and judges push button signalling, the said voltage stabilizer of forbidden energy when judging that said push button signalling is not low level.
3. the power control circuit of embedded controller is characterized in that in the computer system according to claim 1, also comprises: first resistance is connected between said first voltage and the said activation pin position.
4. the power control circuit of embedded controller is characterized in that in the computer system according to claim 3, and wherein, said mu balanced circuit comprises:
The shunt voltage adjuster, the positive terminal of said shunt voltage adjuster is connected to said earth terminal, and the negative pole end of said shunt voltage adjuster is exported said operating voltage;
The 4th resistance is connected between the negative pole end of said first voltage and said shunt voltage adjuster;
The 5th resistance is connected between the reference edge of negative pole end and said shunt voltage adjuster of said shunt voltage adjuster; And
The 6th resistance is connected between the reference edge of positive terminal and said shunt voltage adjuster of said shunt voltage adjuster.
5. the power control circuit of embedded controller is characterized in that in the computer system according to claim 3, and wherein, said detection control circuit also comprises:
The 3rd transistor, said the 3rd transistor drain is connected to said the first transistor grid, and said the 3rd transistor source is connected to said earth terminal;
Second capacitor, said second capacitor, first termination is received said first voltage;
The 4th resistance is connected between said second capacitor, second end and said the 3rd transistor gate;
The 5th resistance is connected between said the 3rd transistor gate and the earth terminal;
The 4th transistor, said the 4th transistor drain is connected to said the first transistor grid, and said the 4th transistor source is connected to said earth terminal;
The 3rd capacitor, said the 3rd capacitor first termination is received second voltage;
The 6th resistance is connected between said the 3rd capacitor second end and said the 4th transistor gate; And
The 7th resistance is connected between said the 4th transistor gate and the earth terminal.
6. the power control circuit of embedded controller is characterized in that in the computer system according to claim 5, and wherein, said mu balanced circuit comprises:
The shunt voltage adjuster, the positive terminal of said shunt voltage adjuster is connected to said earth terminal, and the negative pole end of said shunt voltage adjuster is exported said operating voltage;
The 8th resistance is connected between the negative pole end of said first voltage and said shunt voltage adjuster;
The 9th resistance is connected between the reference edge of negative pole end and said shunt voltage adjuster of said shunt voltage adjuster; And
The tenth resistance is connected between the reference edge of positive terminal and said shunt voltage adjuster of said shunt voltage adjuster.
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| CN200910141606A CN101887299B (en) | 2009-05-15 | 2009-05-15 | Power supply control circuit and control method of computer system |
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| CN101887299B true CN101887299B (en) | 2012-09-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| TWI585566B (en) * | 2015-03-19 | 2017-06-01 | 鴻富錦精密工業（武漢）有限公司 | Direct current power control system and method |
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| US20120159219A1 (en) * | 2010-12-20 | 2012-06-21 | Lilly Huang | Vr power mode interface |
| TWI519938B (en) * | 2013-08-29 | 2016-02-01 | 緯創資通股份有限公司 | Power supply system |
| CN105652995A (en) * | 2014-11-13 | 2016-06-08 | 鸿富锦精密工业(武汉)有限公司 | Mainboard power supply circuit |
| CN106547232B (en) * | 2015-09-22 | 2019-02-26 | 万众科技有限公司 | A kind of hard switching circuit |
| TWI756936B (en) * | 2020-11-24 | 2022-03-01 | 瑞昱半導體股份有限公司 | Power supply circuit |
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