CN100492228C - Device and method for controlling multivoltage electric supply sequence - Google Patents
Device and method for controlling multivoltage electric supply sequence Download PDFInfo
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- CN100492228C CN100492228C CNB2005100730414A CN200510073041A CN100492228C CN 100492228 C CN100492228 C CN 100492228C CN B2005100730414 A CNB2005100730414 A CN B2005100730414A CN 200510073041 A CN200510073041 A CN 200510073041A CN 100492228 C CN100492228 C CN 100492228C
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Abstract
This invention discloses a device for controlling the electric sequences on multiple voltages including multiple supply input and output ends, a control circuit controlling the connecting time of the input and output ends and an up electric control end starting said control circuit. A method is also disclosed including: determining the up electric sequences of the voltage needed by different loads, utilizing a same up electric control signal to generate a time delay signal corresponding to the sequences and turning on the supply of the load corresponding to the time delay after determining the time delay by the time delay signal.
Description
Technical field
The present invention relates to the power supply control technology, be specifically related to a kind of device and method of controlling multivoltage electric supply sequence.
Background technology
Along with the development of large scale integrated circuit technology, chip design and Circuits System design become increasingly complex, and a lot of chips not only adopt the multivoltage power supply, and between each voltage electric sequence are had very high requirement.In order to guarantee the steady operation of chip, must satisfy its electric sequence requirement.
In the prior art normally multivoltage power on according to permanent order, electric sequence configures at the beginning of powering on, the electric sequence after design is finished between the different voltages can not be adjusted again.Its electric sequence control principle is as shown in Figure 1:
Wherein, PWR1_S, PWR2_S, PWR3_S are 3 road voltages of input.Field effect transistor Q1, field effect transistor Q2, field effect transistor Q3 be big electric current field effect transistor (Vgs〉conducting during 1V, otherwise not conducting), be used to control powering on of PWR1_S, PWR2_S, PWR3_S, through field effect transistor, PWR1_S is output as PWR1, PWR2_S is output as PWR2, and PWR3_S is output as PWR3.
GATE signal, resistance R 1/ capacitor C 1, resistance R 2/ capacitor C 2, resistance R 3/ capacitor C 3 have been formed the electric sequence control circuit of voltage PWR1, PWR2, PWR3.Wherein, the GATE signal is the G end control signal of field effect transistor Q1, can adopt plug controller LTC1422 to produce.During normal output, the representative value that GATE voltage deducts PWR1_S is 12V.The function of LTC1422 is the control signal (〉 10V that produces high voltage fet).
The principle of LTC1422 is as shown in Figure 2:
Wherein, the ON signal is used to control the work of LTC1422, and the ON signal enables to export the GATE high voltage signal during for high level, and the GATE signal was output as 0V when the ON signal was low level.The ON signal can be controlled by software is unified by the core processor of system.Capacitor C 10, capacitor C 11 and capacitor C 12 are filter capacitor, and resistance R 10, resistance R 11 and resistance R 12 are current-limiting resistance.
The Vgs of field effect transistor (gate pole-source voltage) equals the GATE signal voltage and deducts the field effect transistor source voltage terminal.Therefore source voltage terminal is PWR1_S, PWR2_S, PWR3_S, and PWR1_S is designed to 3.3V in the design, and PWR2_S is designed to 2.5V, and PWR3_S is designed to 1.8V, and when the GATE signal is high level, Vgs is greater than 1V, the field effect transistor conducting.When the GATE signal is low level (0V), Vgs＜1V, field effect transistor is ended.
The GATE signal normally powers on after low uprising, and at first the R1/C1 circuit begins charging, opens the fet switch that control PWR1 powers on; The R2/C2 circuit begins charging then, opens the fet switch that control PWR2 powers on; The R3/C3 circuit begins charging then, opens the fet switch that control PWR3 powers on.So just realized the sequential control that V33, PWR1, PWR2, PWR3 power on successively.
Diode D1, diode D2 and diode D3 are used for electric control down.Because the capacitive in the system also can charged a period of time.During this period of time, capacitor C 1, capacitor C 2, capacitor C 3 begin to discharge electric energy by diode D1, diode D2, diode D3, and the internal resistance of diode forward conducting is very little, can realize that PWR1, PWR2, PWR3 are simultaneously fast down.
Above electric sequence circuit can increase a greater variety of voltages.
In addition, can also adopt special-purpose electrifying timing sequence control chip to realize the control of multivoltage electric supply sequence in the prior art, its principle as shown in Figure 3:
Electrifying timing sequence control chip by special use produces different control signal GATE1, the GATE2 of sequential, control the N-channel MOS pipe respectively and realize control that voltage V1 and voltage V2 are powered on, control utmost point GATE1, GATE2 driven MOS pipe, by the power-on time of capacitor C 1, C2 program voltage V1, V2, reach the purpose of control electric sequence.
Because during multivoltage electric supply sequence requires, the sequence power-on requirement is arranged not only, some voltage has the requirement that powers on simultaneously.And powering between each voltage also has certain requirement at interval.The prior art scheme is difficult to the requirement that the realization multivoltage powers on simultaneously, nor can reduce the dirigibility of design at the electric sequence of adjusting after the design between each voltage; If adopt special-purpose electrifying timing sequence control chip then can improve design cost.
Summary of the invention
The purpose of this invention is to provide a kind of device of controlling multivoltage electric supply sequence, can not satisfy multivoltage and power on simultaneously and design the requirement that to adjust each voltage electric sequence after finishing flexibly to solve control electrifying timing sequence circuit in the prior art, improve the dirigibility of electric sequence control and reduce and realize cost.
Another object of the present invention provides a kind of method of controlling multivoltage electric supply sequence, to realize the flexible control to multivoltage electric supply sequence easily and reliably.
For this reason, the invention provides following technical scheme:
A kind of device of controlling multivoltage electric supply sequence, comprise: a plurality of power inputs and a plurality of power output ends corresponding with it, each power input reaches between the power output end corresponding with it and is connected with control circuit, be used to control the time of described power input and the connection of described power output end, each control circuit is started by the same control end that powers on.
Described control circuit comprises: delay circuit and gauge tap, and the power input of described delay circuit links to each other with the described control end that powers on, and its signal output part links to each other with described gauge tap, and the output time delayed signal is controlled the closure of described gauge tap.
Alternatively, described delay circuit is specially: the RC charge-discharge circuit.
Alternatively, described delay circuit is specially: programmable logic device (PLD).
Preferably, described gauge tap is specially: field effect transistor, and its grid links to each other with the output terminal of described delay circuit, and source electrode links to each other with described power output end with described power input respectively with drain electrode.
Preferably, described device also comprises: with the corresponding electric control diode down of each delay circuit, its anode links to each other with the signal output part of described delay circuit, and negative electrode links to each other with the described control end that powers on, and is used to control the following electricity order of each voltage.
A kind of method of controlling multivoltage electric supply sequence comprises step:
A, determine the electric sequence of different loads required voltage;
B, utilize the same electric control signal of going up to produce the corresponding time delayed signal of a plurality of and described electric sequence;
Connect power supply behind the delay time that C, the described time delayed signal of process are determined with the corresponding load of described time-delay.
Preferably, produce the described electric control signal of going up by special integrated circuit.
In step B, described upward electric control signal is to produce described a plurality of time delayed signal by a plurality of separate charge-discharge circuits.
Produce described a plurality of time delayed signal by programming in logic.
By above technical scheme provided by the invention as can be seen, the present invention is in the multivoltage power up, utilize the conducting of field effect transistor and the connecting and disconnecting of cut-off state control voltage, and the G of each field effect transistor end is controlled through independent RC circuit by same control signal.Because power-on time constant R, the C of each field effect transistor are separate, therefore the power-on time constant of each field effect transistor can be adjusted flexibly by oneself R, C constant, thereby realize any adjustment, and the interval that powers on can be adjusted arbitrarily also to different voltage electric sequences.By the control of electric control diode down, can realize that plurality of voltages simultaneously fast down.
Because the electric sequence between the multivoltage can be adjusted arbitrarily after design, and the time interval between the different voltage can control flexibly, thereby reduced the design risk effectively.
Utilize the present invention can only use common components and parts can finish the design of control circuit,, greatly reduce cost with respect to power source special module and control chip.
Description of drawings
Fig. 1 is multivoltage electric supply sequence control principle figure in the prior art;
Fig. 2 is the pin synoptic diagram of controller LTC1422;
Fig. 3 is the schematic diagram of the special-purpose electric sequence control chip control of available technology adopting electric sequence;
Fig. 4 is the schematic diagram of apparatus of the present invention;
Fig. 5 is the first example structure block diagram of apparatus of the present invention;
Fig. 6 is the second example structure block diagram of apparatus of the present invention;
Fig. 7 is the realization flow figure of the inventive method.
Embodiment
Core of the present invention is when having a plurality of loads to need different voltages and electric sequence requirement, delay circuit produces respectively and the corresponding time delayed signal of required electric sequence requirement to utilize same upward electric control signal to control separately independently, is controlled the connection of each power supply by time delayed signal separately.
In order to make those skilled in the art person understand the present invention program better, the present invention is described in further detail below in conjunction with drawings and embodiments.
With reference to Fig. 4, Fig. 4 shows the schematic diagram of apparatus of the present invention:
Electric sequence control mode when needing three voltages shown in this figure: power input S1, S2, S3 are three road voltages of input, and its magnitude of voltage can be identical, also can be different.Power output end OUT1, OUT2, OUT3 are the output terminal of three road voltages, and be continuous with different loads in application.The output time of three road voltages is decided by control circuit separately, corresponding to first via voltage, controls its output time by control circuit 41; Corresponding to the second road voltage, control its output time by control circuit 42; Corresponding to Third Road voltage, control its output time by control circuit 43.
The principle of each control circuit is identical, includes a delay circuit and a gauge tap.As shown in the figure, comprise delay circuit 411 and gauge tap 412 in the control circuit 41.The power input of delay circuit 411 links to each other with the control end GATE that powers on, and its signal output part links to each other with gauge tap 412, is used to export the closure of time delayed signal control gauge tap 412.
Delay circuit can be realized by the RC charge-discharge circuit, also can pass through programmable logic device (PLD), realizes such as EPM3032.
Gauge tap can be a field effect transistor, and its grid links to each other with the output terminal of delay circuit, and source electrode links to each other with described power output end with power input respectively with drain electrode.Gauge tap also can be used the switching device of other big electric currents.
When powering on, control end GATE starts each control circuit simultaneously by powering on, delay circuit in the control circuit produces time delayed signal separately, after arriving required delay time, control gauge tap closure separately, the power input power output end corresponding with it connected, for the load of correspondence provides required power supply.
Because each delay circuit is independently, therefore can adjust this circuit parameter according to actual needs and produce required delay time, satisfy the requirement that some voltage powers on simultaneously, and the electric sequence and the requirement in the time interval between some voltage.Even after designing, also can adjust the electric sequence between the different voltages easily arbitrarily.
When needing a greater variety of voltage, the realization principle of electric sequence control is same as described above, does not repeat them here.
With reference to Fig. 5, Fig. 5 is the first example structure block diagram of apparatus of the present invention:
Wherein, voltage V33_S, PWR1_S, PWR2_S, PWR3_S are respectively 4 road voltages from the output of DC/DC secondary power supply module.IRL3803STRR and SI4480DY are big electric current field effect transistor, be used to control powering on of voltage V33_S, PWR1_S, PWR2_S, PWR3_S, through field effect transistor, voltage V33_S is output as V33, voltage PWR1_S is output as PWR1, voltage PWR2_S is output as PWR2, and voltage PWR3_S is output as PWR3.
GATE signal, R4/C4, R1/C1, R2/C2, R3/C3 have formed the electric sequence control circuit of voltage V33, PWR1, PWR2, PWR3 these 4 kinds of voltages.Wherein, the GATE signal is the voltage quality condition indicative signal through hot-swapping controller output, when voltage V33_S, PWR1_S, PWR2_S, PWR3_S all just often, the GATE signal is a high level, when wherein certain voltage is undesired, GATE signal output low level.The GATE signal normally powers on after low uprising, simultaneously to R4/C4 circuit, R1/C1 circuit, R2/C2 circuit, the charging of R3/C3 circuit, correspondingly open the fet switch that control voltage V33, PWR1, PWR2, PWR3 power on according to the difference of R4/C4, R1/C1, R2/C2, R3/C3 time parameter:
Use the field effect transistor of two parallel connections: Q2 and Q3 corresponding to the gauge tap of voltage V33 in the present embodiment,, reduce the heat power consumption of each field effect transistor so that each field effect transistor is shunted.When powering on, GATE exports high level, and the GATE signal begins C4 is charged simultaneously, and charging rate is controlled by R4*C4, makes Vgs when charging to〉during 1V, field effect transistor Q2 and Q3 conducting, V33 output.
Correspond respectively to the field effect transistor SI4480DY of voltage PWR1, PWR2, PWR3, its principle of work is identical with the principle of work of above-mentioned field effect transistor Q2 and Q3, does not repeat them here.
So just realized the sequential control that voltage V33, PWR1, PWR2, PWR3 electric sequence can be adjusted arbitrarily, and the interval that powers on can be adjusted arbitrarily.
Resistance R 27 among the figure, R28, R31, R34, R35 are used to prevent the self-sustained oscillation of field effect transistor G end.
MURS120T3 diode D1, D2, D3, D4 are used for electric control down.Under the power supply behind the electricity, because the capacitive in the system, also can charged a period of time.During this period of time, capacitor C 1, C2, C3, C4 begin to discharge electric energy, C1, C2, C3, the C4 all following electric diode by separately are discharged into the GATE signal with electric energy, finally electric energy is discharged by the GATE signal, because the internal resistance of diode forward conducting is very little, can realize that PWR1, PWR2, PWR3 are simultaneously fast down.
Through checking, in design, use R4=0 Ω, C4=0.01 μ F; R1=1M Ω, C1=0.01 μ F; R2=3M Ω, C2=2200pF; R3=3M Ω, C3=0.01 μ F, can realize V33 (+3.3V), PWR1 (+3.3V), PWR2 (+2.5V), PWR3 (+1.8V) sequence power-on and any two voltages power on and are no more than at interval the requirement of 20ms successively.
Through checking, in design, use R4=3M Ω, C4=0.01 μ F; R1=1M Ω, C1=2200pF; R2=3M Ω, C2=0.01 μ F; R3=0 Ω, C3=0.01 μ F, can realize PWR3 (+1.8V), PWR1 (+3.3V), PWR2 (+2.5V), V33 (+3.3V) sequence power-on and any two voltages power on and are no more than at interval the requirement of 20ms successively.
By this embodiment as seen, the G of each field effect transistor end all is that the GATE signal is controlled through an independent RC circuit in the present invention.Power-on time constant R, the C of each delay circuit are separate, do not have dependence.Therefore the power-on time of each field effect transistor control can be adjusted flexibly by oneself R, C constant, thereby reaches the effect that electric sequence can be adjusted arbitrarily.
And for prior art scheme shown in Figure 1, first field effect transistor is through a RC circuit, second field effect transistor is through two RC circuit, the resistance of equivalence increases, then under the identical situation of electric capacity, make the power-on time of second field effect transistor longer than the power-on time of first field effect transistor, and the like, realize the electric sequence control of multivoltage.Each delay circuit interdepends, in case design is finished, the electric sequence of each voltage promptly is maintained fixed constant, can't adjust arbitrarily.
With reference to Fig. 6, Fig. 6 is the second example structure block diagram of apparatus of the present invention:
Utilize programmable logic device (PLD) to produce a plurality of time delayed signal Cont1, Cont2, Cont3, use these time delayed signals directly to control the conducting of different field effect transistor with required time delay interval.The principle that produces time delayed signal is to produce the different time delayed signals that powers on by outside OSC crystal oscillator.Require the different time delayed signals that powers on is distributed to Cont1, Cont2, Cont3 signal respectively according to electric sequence, thereby reach programmable electric sequence.As adopt OSC (crystal oscillator) crystal oscillator of 1KHZ, and the cycle is 1ms, and Cont1 is programmed for direct output high level, and Cont2 just exports high level for 5 all after dates of OSC crystal oscillator counting, and Cont3 just exports high level for 10 all after dates of OSC crystal oscillator counting.Then after the 1st field effect transistor conducting, the 2nd field effect transistor conducting behind 5ms, the 3rd field effect transistor conducting behind 5ms again.
According to the practical application needs, can adjust the delay time between different control signals arbitrarily, thereby realize control different loads power-on time order.
With reference to Fig. 7, Fig. 7 shows the realization flow of the inventive method:
At first, in step 701: the electric sequence of determining the different loads required voltage.
Step 702: utilize the same electric control signal of going up to produce and the corresponding time delayed signal of electric sequence.
Such as, produce the described electric control signal of going up by special integrated circuit LTC1422, control different RC delay circuits respectively by electric control signal on this and produce and the corresponding time delayed signal of electric sequence.
Can also produce the described electric control signal of going up by the RC circuit.Produce corresponding time delayed signal by programming in logic.
Step 703: through the power supply of connection behind the definite delay time of time delayed signal with the corresponding load of time-delay.
Though described the present invention by embodiment, those of ordinary skills know, the present invention has many distortion and variation and do not break away from spirit of the present invention, wish that appended claim comprises these distortion and variation and do not break away from spirit of the present invention.
Claims (10)
1, a kind of device of controlling multivoltage electric supply sequence, comprise: a plurality of power inputs and a plurality of power output ends corresponding with it, it is characterized in that, each power input reaches between the power output end corresponding with it and is connected with control circuit, be used to control the time of described power input and the connection of described power output end, each control circuit is started by the same control end that powers on.
2, the device of control multivoltage electric supply sequence according to claim 1, it is characterized in that, described control circuit comprises: delay circuit and gauge tap, the power input of described delay circuit links to each other with the described control end that powers on, its signal output part links to each other with described gauge tap, and the output time delayed signal is controlled the closure of described gauge tap.
3, the device of control multivoltage electric supply sequence according to claim 2 is characterized in that, described delay circuit is specially: the RC charge-discharge circuit.
4, the device of control multivoltage electric supply sequence according to claim 2 is characterized in that, described delay circuit is specially: programmable logic device (PLD).
5, the device of control multivoltage electric supply sequence according to claim 2, it is characterized in that, described gauge tap is specially: field effect transistor, and its grid links to each other with the output terminal of described delay circuit, and source electrode links to each other with described power output end with described power input respectively with drain electrode.
6, the device of control multivoltage electric supply sequence according to claim 2, it is characterized in that, described device also comprises: with the corresponding electric control diode down of each delay circuit, its anode links to each other with the signal output part of described delay circuit, negative electrode links to each other with the described control end that powers on, and is used to control the following electricity order of each voltage.
7, a kind of method of controlling multivoltage electric supply sequence is characterized in that, comprises step:
A, determine the electric sequence of different loads required voltage;
B, utilize the same electric control signal of going up to produce the corresponding time delayed signal of a plurality of and described electric sequence;
Connect power supply behind the delay time that C, the described time delayed signal of process are determined with the corresponding load of described time-delay.
8, the method for control multivoltage electric supply sequence according to claim 7 is characterized in that, produces the described electric control signal of going up by special integrated circuit.
9, the method for control multivoltage electric supply sequence according to claim 7 is characterized in that, in step B, described upward electric control signal is to produce described a plurality of time delayed signal by a plurality of separate charge-discharge circuits.
10, the method for control multivoltage electric supply sequence according to claim 7 is characterized in that, produces described a plurality of time delayed signal by programming in logic.
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| CNB2005100730414A CN100492228C (en) | 2005-05-30 | 2005-05-30 | Device and method for controlling multivoltage electric supply sequence |
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| CNB2005100730414A CN100492228C (en) | 2005-05-30 | 2005-05-30 | Device and method for controlling multivoltage electric supply sequence |
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| CN100492228C true CN100492228C (en) | 2009-05-27 |
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Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100464282C (en) * | 2007-02-06 | 2009-02-25 | 杭州华三通信技术有限公司 | Method and device for controlling electric sequence of distributed system |
| CN100464306C (en) * | 2007-03-13 | 2009-02-25 | 杭州华三通信技术有限公司 | Sequentially electrifying device, method and single board |
| CN102571074B (en) * | 2010-12-08 | 2016-05-25 | 国网山东省电力公司济宁供电公司 | Voltage sequence output circuit |
| CN102915097A (en) * | 2011-08-03 | 2013-02-06 | 中兴通讯股份有限公司 | Method and device for controlling electrifying sequence |
| CN102999140B (en) * | 2012-05-30 | 2015-12-09 | 国家计算机网络与信息安全管理中心 | A kind of electrifying timing sequence control system of PCIE board and method |
| CN103532532B (en) * | 2013-08-27 | 2016-12-28 | 陕西中科天地航空模块有限公司 | Power-up/down time sequence control circuit |
| CN104980146A (en) * | 2015-06-17 | 2015-10-14 | 北京兆易创新科技股份有限公司 | Drive control device and PADIO output circuit with same |
| CN106371334B (en) * | 2015-07-21 | 2019-03-01 | 深圳市奇辉电气有限公司 | A kind of Power-up/down time sequence control circuit and power-supply system |
| CN108519806A (en) * | 2018-04-26 | 2018-09-11 | 北京比特大陆科技有限公司 | A kind of chip controls method, apparatus, computer equipment and computer storage media |
| CN109062111B (en) * | 2018-08-29 | 2021-06-29 | 郑州云海信息技术有限公司 | Power supply IC and time delay control device thereof |
| CN112398326B (en) * | 2019-08-13 | 2022-04-05 | 国民技术股份有限公司 | Soft start device and method based on multi-output device, power supply and chip |
| CN111596585B (en) * | 2020-05-19 | 2021-09-03 | 珠海格力智能装备有限公司 | System control method, circuit, electronic device, and storage medium |
| CN116670620A (en) * | 2021-05-31 | 2023-08-29 | 华为技术有限公司 | Power circuit and electronic device |
| CN114661130A (en) * | 2022-03-09 | 2022-06-24 | 湖南智领通信科技有限公司 | Power supply control circuit of CPU module and design method |
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Address after: 310052 Binjiang District Changhe Road, Zhejiang, China, No. 466, No. Patentee after: Xinhua three Technology Co., Ltd. Address before: 310053 Hangzhou hi tech Industrial Development Zone, Zhejiang province science and Technology Industrial Park, No. 310 and No. six road, HUAWEI, Hangzhou production base Patentee before: Huasan Communication Technology Co., Ltd. |