CN101655732A - Power-started control device and power-started control method - Google Patents
Power-started control device and power-started control method Download PDFInfo
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- CN101655732A CN101655732A CN200810210131A CN200810210131A CN101655732A CN 101655732 A CN101655732 A CN 101655732A CN 200810210131 A CN200810210131 A CN 200810210131A CN 200810210131 A CN200810210131 A CN 200810210131A CN 101655732 A CN101655732 A CN 101655732A
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Abstract
The invention relates to a power-started control device and a power-started control method, which are applied to a power supply converter. The power supply converter supplies fixed voltage. The power-started control device comprises a first voltage conversion circuit, a second voltage conversion circuit, a third voltage conversion circuit and a comparison module, wherein the first voltage conversion circuit receives the fixed voltage and generates a reference voltage; the second voltage conversion circuit receives the fixed voltage and generates multiple working voltages; the third voltage conversion circuit receives the working voltages and generates multiple preliminary voltages correspondingly according to the working voltages; and when the preliminary voltages are larger than the reference voltage, the comparison module outputs excellent signals of the power supply.
Description
Technical field
The present invention is about a kind of control device and method of power initiation, particularly a kind of control device and method of power initiation of the power supply changeover device that is applied to provide fixed voltage.
Background technology
When computer system starts at the beginning, can produce suitable DC voltage, and electric power starting need pass through a bit of time, just can provide inside computer system element or peripheral element to use, and then make the computing machine normal operation.If, before the power supply no show still of computer system is stable,, can cause computer system errors and phenomenon that can't normal operation produces just provide computing machine to use power supply or attempt start, be because of due to the suitable voltage of power supply no show still in fact.Therefore, too early in order to prevent computer system starting, power supply unit can provide a signal to mainboard, and this signal is the good signal of so-called power supply.That is to say, finish close beta and judge just can send the good signal of power supply, and informing that mainboard can start computer system when being ready to be used when the power unit of computer system.
Yet, when computer system adopts power supply changeover device (adapter) so that power supply to be provided, power supply changeover device only provides a fixing voltage to computer system, therefore when computer system is powered by power supply changeover device, power supply changeover device can't directly produce the good signal of power supply and give computer system, therefore computer system can't learn whether power supply is ready to complete, and causes computer system in can't normally starting.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of control device and method of power initiation, to improve the shortcoming of prior art.
The present invention proposes a kind of control device of power initiation, be applied to power supply changeover device, this power supply changeover device provides fixed voltage, and the control device of this power initiation comprises: first voltage conversion circuit, second voltage conversion circuit, tertiary voltage change-over circuit and comparison module.First voltage conversion circuit receives fixed voltage, and produces reference voltage.Second voltage conversion circuit receives fixed voltage, produces a plurality of operating voltage.The tertiary voltage change-over circuit receives operating voltage, and according to a plurality of stand-by voltages of the corresponding generation of operating voltage.Comparison module, when stand-by voltage all greater than reference voltage, the good signal of out-put supply.
The present invention also proposes a kind of control method of power initiation, is applied to power supply changeover device, and this power supply changeover device provides fixed voltage, comprises the following step: receive fixed voltage, and produce reference voltage; Receive fixed voltage, and produce a plurality of operating voltage; Receive operating voltage, and according to a plurality of stand-by voltages of the corresponding generation of operating voltage; When stand-by voltage all greater than reference voltage, the good signal of out-put supply.
By device proposed by the invention or method, can allow and have power supply changeover device (adapter) and the computing machine of fixed voltage is provided, when power supply is ready to be used, produces the good signal of power supply that is short of in the prior art, and then computing machine can be started smoothly.
Relevant preferred embodiment of the present invention and effect thereof, conjunction with figs. explanation now as after.
Description of drawings
Figure 1A is an embodiment synoptic diagram () of the control device of power initiation.
Figure 1B is an embodiment synoptic diagram (two) of the control device of power initiation.
Fig. 2 is an embodiment circuit diagram of tertiary voltage change-over circuit and comparison module.
Fig. 3 is the process flow diagram of the control method of power initiation.
Embodiment
Please be respectively an embodiment synoptic diagram () and (two) of the control device of power initiation of the present invention simultaneously with reference to Figure 1A and Figure 1B.The control device of power initiation proposed by the invention is applied to provide the power supply changeover device (adapter) of fixed voltage, and power supply changeover device can provide computer system required power supply with coupled computer systems.The control device 5 of power initiation comprises: first voltage conversion circuit 10, second voltage conversion circuit 20, tertiary voltage change-over circuit 30, comparison module 40.In this, the fixed voltage V that power supply changeover device 1 is provided
cCan be 19 volts, but not as limit.
The fixed voltage V that first voltage conversion circuit 10 is provided according to power supply changeover device 1
c, produce reference voltage V
RefBy shown in Figure 1B as can be known, first voltage conversion circuit 10 can be bleeder circuit, produces reference voltage V in the dividing potential drop mode
RefWherein, the magnitude of voltage of reference voltage can be set on demand.
Because computer system needs the power supply of a plurality of different magnitudes of voltage, so that being provided, uses by different elements, and therefore, second voltage conversion circuit 20 receives the fixed voltage V that power supply changeover device 1 is provided
c, the fixed voltage of single magnitude of voltage is converted to the operating voltage of a plurality of different magnitudes of voltage.By Figure 1B as can be known, second voltage conversion circuit 20 can be reduction voltage circuit, in the step-down mode with fixed voltage V
cConvert a plurality of operating voltage to.Illustrate, second voltage conversion circuit 20 receives fixed voltage V
c, 19 volts fixed voltages are converted to a plurality of operating voltage, be respectively 3 volts, 5 volts and 12 volts, so that being provided, computer system uses, but not as limit.
Tertiary voltage change-over circuit 30 receives the operating voltage that is produced by second voltage conversion circuit 20 respectively, and produces stand-by voltage according to operating voltage.By Figure 1B as can be known, tertiary voltage change-over circuit 30 can be bleeder circuit, produces stand-by voltage in the dividing potential drop mode.Illustrate, the power supply of computer system has just begun to start, because power supply has just just begun to climb, therefore be not ready to complete as yet, and when each operating voltage rise to maximum voltage value 90% the time, the expression power supply has been about to arrive load voltage value, can use for computer system, just can send out the good signal of so-called power supply this moment.Therefore, the present invention utilizes tertiary voltage change-over circuit 30, receives each operating voltage, utilize bleeder circuit realize when operating voltage arrival load voltage value 90% the time, just represent that operating voltage is ready to complete, can use for computer system, but not exceed with 90%.
With some operating voltage is that example explains, but not as limit, suppose that operating voltage is that 5 volts, the dividing potential drop ratio of tertiary voltage change-over circuit 30 are 2/3, stand-by voltage is 3 volts (5 volts of * 90%*2/3), and therefore setting reference voltage at this embodiment is 2.95 volts.When power supply just begins to start, operating voltage is non-to be 5 volts immediately, must could arrive 5 volts of specified voltages between the rising stage via one section voltage, the operating voltage that this moment, 30 receptions of tertiary voltage change-over circuit just started, can be according to the stand-by voltage that operating voltage produced less than 2.95 volts, under the comparison via comparison module 40, the signal that output terminal 46 is produced is low level (low) signal, thereby can not produce the good signal of power supply.When operating voltage rises gradually, the operating voltage that tertiary voltage change-over circuit 30 is produced arrives 90% of rated voltage, that is 4.5 volts, represent 5 volts operating voltage to be ready to complete.At this moment, be 3 volts via the stand-by voltage that is produced after tertiary voltage change-over circuit 30 dividing potential drops, under the comparison by comparison module 40, the stand-by voltage of positive input terminal 44 is 3 volts, the reference voltage of negative input end 42 is 2.95 volts, and output terminal 46 just can be exported the high level signal, that is the good signal of out-put supply, and then allows 5 volts the operating voltage of learning of computer system be ready to complete.In this mandatory declaration, because general computing machine has the operating voltage of a plurality of different magnitudes of voltage, we can design the different pressure conditions that divide, before allowing operating voltage reach rated voltage, all about 3 volts of the stand-by voltage that is produced, and greater than setting 2.95 volts of reference voltages, use a simple logic lock again, AND lock for example, therefore can wait until that all working voltage has been ready to complete all after, just send the good signal of power supply.
Please refer to the embodiment circuit diagram of Fig. 2 for tertiary voltage change-over circuit and comparison module.In this, the circuit that illustrates tertiary voltage change-over circuit 30 and comparison module 40 couples relation.As shown in Figure 2 as can be known, the operating voltage of 3 volts, 5 volts and 12 volts is utilized a plurality of resistance respectively and is carried out dividing potential drop in the tertiary voltage change-over circuit 30, to produce corresponding stand-by voltage respectively.Comparison module 40 comprises a plurality of comparers, and therefore can be integrated into an integrated circuit (IC), and have many branch connecting pins, as: pin+IN1 is in order to couple the stand-by voltage that tertiary voltage change-over circuit 30 is produced; Pin-IN1 and-IN2 are in order to couple reference voltage V
RefPin OUT2 is in order to the good signal S of out-put supply
PgDeng.
Please refer to Fig. 3, this figure is depicted as the process flow diagram of the control method of power initiation, is applied to power supply changeover device, and this power supply changeover device provides fixed voltage, comprises the following step.Wherein, fixed voltage can be 19 volts.
Step S10: receive fixed voltage, and produce reference voltage.In this, can utilize the dividing potential drop mode, produce reference voltage.
Step S20: receive fixed voltage, and produce a plurality of operating voltage.In this, can utilize the step-down mode, produce operating voltage.Wherein, operating voltage can be selected from 3 volts, 5 volts and 12 volts of groups that constituted.
Step S30: receive operating voltage, and according to a plurality of stand-by voltages of the corresponding generation of operating voltage.In this, can utilize the dividing potential drop mode, produce stand-by voltage.
Step S40: when stand-by voltage all greater than reference voltage, the good signal of out-put supply.
Though technology contents of the present invention discloses as above with preferred embodiment; right its is not in order to limit the present invention; anyly be familiar with this technician; do not breaking away from spirit of the present invention a little change and the retouching done; all should be covered by in the category of the present invention, so protection scope of the present invention is as the criterion when looking the content that claims define.
Claims (13)
1. the control device of a power initiation is connected to power supply changeover device, and above-mentioned power supply changeover device provides fixed voltage, it is characterized in that, the control device of above-mentioned power initiation comprises:
First voltage conversion circuit receives said fixing voltage, and produces reference voltage;
Second voltage conversion circuit receives said fixing voltage, produces a plurality of operating voltage;
The tertiary voltage change-over circuit receives above-mentioned these operating voltage, and according to a plurality of stand-by voltages of the corresponding generation of above-mentioned these operating voltage; And
Comparison module, when above-mentioned these stand-by voltages all greater than above-mentioned reference voltage, the good signal of out-put supply.
2. according to the control device of the power initiation of claim 1, it is characterized in that, wherein above-mentioned comparison module has a plurality of comparers, above-mentioned these comparers have negative input end, positive input terminal and output terminal respectively, above-mentioned negative input end receives above-mentioned reference voltage, above-mentioned positive input terminal receives arbitrary above-mentioned these stand-by voltages, and above-mentioned output terminal is in order to export the good signal of above-mentioned power supply.
3. according to the control device of the power initiation of claim 1, it is characterized in that wherein above-mentioned first voltage conversion circuit is a bleeder circuit.
4. according to the control device of the power initiation of claim 1, it is characterized in that wherein above-mentioned second voltage conversion circuit is a reduction voltage circuit, to the said fixing voltage step-down, and produces above-mentioned these operating voltage.
5. according to the control device of the power initiation of claim 1, it is characterized in that wherein above-mentioned tertiary voltage change-over circuit is a bleeder circuit, receive above-mentioned these operating voltage and produce corresponding above-mentioned these stand-by voltages.
6. according to the control device of the power initiation of claim 1, it is characterized in that wherein said fixing voltage is 19 volts.
7. according to the control device of the power initiation of claim 1, it is characterized in that wherein above-mentioned these operating voltage are selected from 3 volts, 5 volts and 12 volts of groups that constituted.
8. the control method of a power initiation is characterized in that, comprises the following step:
Receive the fixed voltage of power supply changeover device, and produce reference voltage;
Receive said fixing voltage, and produce a plurality of operating voltage;
Receive above-mentioned these operating voltage, and according to a plurality of stand-by voltages of the corresponding generation of above-mentioned these operating voltage; And
When above-mentioned these stand-by voltages all greater than above-mentioned reference voltage, the good signal of out-put supply.
9. the control method of power initiation according to Claim 8 is characterized in that, wherein produces the step of above-mentioned reference voltage, produces above-mentioned reference voltage in the dividing potential drop mode.
10. the control method of power initiation according to Claim 8 is characterized in that, wherein produces the step of above-mentioned these operating voltage, in the step-down mode, produces above-mentioned these operating voltage.
11. the control method of power initiation according to Claim 8 is characterized in that, wherein produces the step of above-mentioned these stand-by voltages, in the dividing potential drop mode, produces above-mentioned these stand-by voltages.
12. the control method of power initiation according to Claim 8 is characterized in that, wherein said fixing voltage is 19 volts.
13. the control method of power initiation according to Claim 8 is characterized in that, wherein above-mentioned these operating voltage are selected from 3 volts, 5 volts and 12 volts of groups that constituted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810210131A CN101655732A (en) | 2008-08-21 | 2008-08-21 | Power-started control device and power-started control method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810210131A CN101655732A (en) | 2008-08-21 | 2008-08-21 | Power-started control device and power-started control method |
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| CN101655732A true CN101655732A (en) | 2010-02-24 |
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| CN200810210131A Pending CN101655732A (en) | 2008-08-21 | 2008-08-21 | Power-started control device and power-started control method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102692967A (en) * | 2012-05-14 | 2012-09-26 | 江苏中科梦兰电子科技有限公司 | Computer mainboard circuit capable of supporting various power adapters |
| CN102914688A (en) * | 2011-08-01 | 2013-02-06 | 冠捷投资有限公司 | Electronic system, device with voltage detecting and warning functions, and voltage detection circuit |
| CN105676982A (en) * | 2014-11-17 | 2016-06-15 | 鸿富锦精密工业(武汉)有限公司 | Power supply matching circuit |
-
2008
- 2008-08-21 CN CN200810210131A patent/CN101655732A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102914688A (en) * | 2011-08-01 | 2013-02-06 | 冠捷投资有限公司 | Electronic system, device with voltage detecting and warning functions, and voltage detection circuit |
| CN102692967A (en) * | 2012-05-14 | 2012-09-26 | 江苏中科梦兰电子科技有限公司 | Computer mainboard circuit capable of supporting various power adapters |
| CN105676982A (en) * | 2014-11-17 | 2016-06-15 | 鸿富锦精密工业(武汉)有限公司 | Power supply matching circuit |
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Open date: 20100224 |