CN101853039B - Reference voltage supplying circuit, reference voltage supplying method and voltage regulating circuit - Google Patents
Reference voltage supplying circuit, reference voltage supplying method and voltage regulating circuit Download PDFInfo
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Abstract
The invention relates to a reference voltage supplying circuit, a reference voltage supplying method and a voltage regulating circuit. The reference voltage supplying circuit is used for supplying a reference voltage to an error amplifier; and the error amplifier is used for comparing the reference voltage with a feedback voltage. The reference voltage supplying circuit comprises a voltage detecting module and a controllable voltage supplying module, wherein the voltage detecting module is used for detecting the feedback voltage to generate a control signal; and the controllable voltage supplying module is used for supplying the reference voltage according to the control signal. When the feedback voltage deviates a desired value in a presetting region, the reference voltage supplying circuit substantially supplies the desired value as the reference voltage, and when the feedback voltage deviates the desired value over the presetting region, the reference voltage supplying circuit enables the reference voltage temporarily not be the desired value so as to quicken the feedback voltage to return to the desired value.
Description
Technical field
The invention relates to that reference voltage provides circuit, uses this reference voltage to provide the method that provides of the voltage-regulating circuit of circuit and reference voltage thereof, the voltage when being particularly to improve load transfer to jump or the reference voltage of bust phenomenon provides circuit, use this reference voltage that the method that provides of the voltage-regulating circuit of circuit and reference voltage thereof is provided.
Background technology
In many electric power or electronic system, can use a voltage-regulating circuit to provide a burning voltage to the rear end load to adjust an output voltage.Fig. 1 shows the Organization Chart of a voltage-regulating circuit 100 in the prior art.In this embodiment, voltage-regulating circuit 100 comprises a voltage regulator module 101, an error amplifier 103, an inductance 105, resistance 107,109 and electric capacity 111.Inductance 105, resistance 107,109 and electric capacity 111 be coupled to a load 125.Voltage regulator module 101 is in order to export an output voltage V
Out, it can form a feedback signal FB by the tie point in resistance 107 and 109, and error amplifier 103 can be according to magnitude of voltage (that is a feedback voltage) and the reference voltage V of feedback signal FB
RefDifference to export a difference signal DIS.And voltage regulator module 101 can decide according to difference signal DIS and will increase or reduce output voltage V
Out, with output voltage V
OutControl is at a preset value.
In example shown in Figure 1, voltage regulator module 101 comprises a comparer 113, a SR flip-flop 115, a frequency signal source 117, a control circuit 119 and a PMOS121, a NMOS123.Comparative result and a current value I by PMOS121 that comparer 113 compares from error amplifier 103
Sense, its result is delivered to the replacement end of SR flip-flop 115.Because those of ordinary skill in the art are when other structure and other the detailed action that can understand voltage-regulating circuit shown in Figure 1 100 easily, so do not repeat them here.
Yet, the problem that such structure but has voltage die or jumps.Fig. 2 a and Fig. 2 b show when load changes, and export the voltage die of load or situation about jumping to.Wherein Fig. 2 a shows the situation of voltage die, and its reason is that load 125 changes into heavy duty by underloading suddenly, so the electric current that inductance 105 is exported is not enough to provide load 125 palpus electric currents in moment, so can cause the output voltage V at node 127 places
OutMoment descends.Opposite, wherein Fig. 2 b shows the situation that voltage jumps, and its reason is that load 125 changes into underloading by heavy duty suddenly, and 125 palpus electric currents of electric current high overload of moment that inductance 105 is exported are so can cause the output voltage V at node 127 places
OutMoment rises.Along with the difference of the value of electric capacity 111, the output voltage V at node 127 places
OutJump or the amount of bust can be different.So can cause bad influence to circuit.
Therefore, need a kind of circuit structure of novelty to solve above-mentioned problem.
Summary of the invention
One of purpose of the present invention is to provide a kind of reference voltage that circuit is provided and method is provided, and whether it is according to having voltage to jump or the phenomenon of voltage die, the reference voltage that comes corresponding change to provide.
Another object of the present invention is to provide a kind of voltage-regulating circuit, it can compensate, and the voltage that causes because of the conversion of the weight of load jumps or the phenomenon of voltage die, so that suitable output voltage to be provided.
Embodiments of the invention have disclosed a kind of reference voltage circuit are provided, and in order to reference voltage to an error amplifier to be provided, error amplifier is this reference voltage and a feedback voltage relatively.Reference voltage provides circuit to comprise: a detecting voltage module, in order to detect feedback voltage to produce a control signal; An and controllable type voltage supply module, in order to provide reference voltage according to control signal, when this feedback voltage departs from an expectation value in a preset range time, this reference voltage provides circuit roughly to provide this expectation value as this reference voltage, and when this feedback voltage departs from this expectation value above this preset range, this reference voltage provides circuit to make this reference voltage temporarily not be this expectation value, revert to this expectation value to accelerate this feedback voltage.
Another embodiment of the present invention has disclosed a kind of voltage-regulating circuit, comprises: a voltage regulator module, adjust voltage in order to produce one according to a comparative result; One error amplifier, in order to relatively corresponding to a feedback voltage of adjusting voltage and a reference voltage to produce comparative result; And one reference voltage circuit is provided, in order to detect feedback voltage, so that reference voltage to be provided, wherein, when feedback voltage departs from an expectation value in a preset range time, reference voltage provides circuit roughly to provide expectation value as reference voltage, and when feedback voltage departs from this expectation value and surpasses preset range, reference voltage provides circuit to make this reference voltage temporarily not be expectation value, revert to expectation value to accelerate feedback voltage.This reference voltage provides circuit to comprise: a detecting voltage module, in order to detect feedback voltage to produce a control signal; And a controllable type voltage supply module, in order to provide reference voltage according to control signal.
A kind of method that provides of reference voltage has been provided another embodiment of the present invention, in order to reference voltage to an error amplifier to be provided, and error amplifier comparison reference voltage and a feedback voltage, this method includes: the detecting feedback voltage; When feedback voltage departs from an expectation value in a preset range time, make reference voltage be substantially equal to expectation value; And when feedback voltage departs from expectation value above preset range, make reference voltage temporarily not be expectation value, revert to expectation value to accelerate feedback voltage.
According to the above embodiments, whether reference voltage provides the circuit can be according to having voltage to jump or the reference voltage that provides is provided the voltage die phenomenon.Therefore but the voltage-regulating circuit bucking voltage jumps or voltage die phenomenon and stable output voltage is provided.
Description of drawings
Fig. 1 shows the Organization Chart of a voltage-regulating circuit in the prior art;
Fig. 2 a and Fig. 2 b show when load changes, and export the voltage die of load or situation about jumping to;
Fig. 3 shows the voltage-regulating circuit according to one embodiment of the invention;
Fig. 4 shows the wherein embodiment that reference voltage shown in Figure 3 provides the detailed construction of circuit;
Fig. 5 shows an embodiment of the detailed construction of bust detecting voltage module shown in Figure 4;
Fig. 6 shows an embodiment of the detailed construction of the detecting voltage module that jumps shown in Figure 4;
Fig. 7 shows a wherein embodiment of controllable type voltage supply module shown in Figure 4;
Fig. 8 shows the more specific embodiment of circuit diagram shown in Figure 5;
Fig. 9 shows the more specific embodiment of circuit diagram shown in Figure 6;
Figure 10 shows the voltage synoptic diagram that use voltage-regulating circuit according to the present invention produces;
Figure 11 shows the voltage synoptic diagram that use voltage-regulating circuit according to the present invention produces.
[main element symbol description]
100,300: voltage-regulating circuit
101: voltage regulator module
103: error amplifier
501,601: comparer
105: inductance
107,10: resistance
111: electric capacity
113,819: comparer
The 115:SR flip-flop
117: frequency signal source
119: control circuit
121：PMOS
123：NMOS
125: load
127: node
301: reference voltage provides circuit
303: the detecting voltage module
305: controllable type voltage supply module
307: bust detecting voltage module
309: the detecting voltage module jumps
503,603: the pulse signal generation module
505,605: intercept circuit
507,607: pulse generator
509,511,609,611:SR flip-flop
513,613: the adjustable delay line
701,703: on-off element
801,821: switch
803,823: resistance
805,817:AND door
807,809,811: phase inverter
813: differential amplifier
815: phase inverter
The 901:XOR door
The 903:AND door
905: comparer
Embodiment
In the middle of instructions and follow-up claim, used some vocabulary to censure specific element.Those of ordinary skill in the art should understand, and hardware manufacturer may be called same element with different nouns.This instructions and follow-up claim are not used as distinguishing the mode of element with the difference of title, but the criterion that is used as distinguishing with the difference of element on function.Be an open term mentioned " comprising " in the middle of instructions and the follow-up request item in the whole text, so should be construed to " comprise but be not limited to ".In addition, " coupling " word is to comprise any indirect means that are electrically connected that directly reach at this.Therefore, be coupled to one second device if describe one first device in the literary composition, then represent this first device and can directly be electrically connected in this second device, or be electrically connected to this second device indirectly through other device or connection means.
Fig. 3 shows the voltage-regulating circuit 300 according to one embodiment of the invention.Compared to voltage-regulating circuit shown in Figure 1 100, voltage-regulating circuit 300 shown in Figure 3 also comprises a reference voltage provides circuit 301, in order to change the reference voltage V of error amplifier 103 according to feedback signal FB
RefParticularly, reference voltage provides circuit 301 detecting feedback signal FB, and is taking place that voltage jumps or during the bust situation, changing reference voltage V
Ref, voltage regulator module 101 is reacted fast, voltage jumps or the situation of bust to improve.
Fig. 4 shows the wherein embodiment that reference voltage shown in Figure 3 provides the detailed construction of circuit 301.As shown in Figure 4, reference voltage provides circuit 301 to comprise a detecting voltage module 303 and a controllable type voltage supply module 305.Detecting voltage module 303 is in order to detect the magnitude of voltage V of feedback signal FB
FBTo produce a control signal CS.Controllable type voltage supply module 305 receives control signal CS and provides reference voltage V according to control signal CS
RefWhole voltage-regulating circuit 300 can make the magnitude of voltage V of feedback signal FB
FBApproach reference voltage V
RefIn other words, when steady state (SS), magnitude of voltage V
FBCan equal an expectation value, just reference voltage V
RefPreset value.
Whether the bust detecting voltage module 307 in the detecting voltage module 303 is lower than one first predetermined voltage in order to the magnitude of voltage of detecting feedback signal FB, uses to produce a bust voltage instruction signal V
DWith as control signal CS.Whether the detecting voltage module 309 that jumps in the detecting voltage module 303 is higher than one second predetermined voltage in order to the magnitude of voltage of detecting feedback signal FB, uses to produce the voltage instruction signal V that jumps
RWith as control signal CS.
In one embodiment, control signal CS is a pulse signal.And controllable type voltage supply module 305 can change reference voltage V according to the pulse bandwidth of pulse signal
Ref, making it temporarily is not this expectation value.Therefore, reference voltage shown in Figure 4 provides the action of circuit 301 to be summarized as follows: jump or the situation of bust when taking place as voltage, detecting voltage module 303 is sent a corresponding pulse signal as control signal CS, and controllable type voltage supply module 305 temporarily changes reference voltage V according to the width of pulse signal
RefIt is noted that structure shown in Figure 4 and action are not in order to limit the present invention only in order to for example.In addition, circuit shown in Figure 4 is not limited to use the circuit structure shown in Figure 3, for instance, the voltage that reference voltage provides circuit 301 to export not necessarily is input to an error amplifier as reference voltage, and such variation all should be within the scope of the present invention.
Therefore, the present invention is disclosed wherein one provides the method for reference voltage letter to show as follows: the detecting feedback voltage; When feedback voltage departs from an expectation value in a preset range time, make reference voltage be substantially equal to expectation value when not having bust or jumping situation (that is); And when feedback voltage departs from this expectation value above preset range, make reference voltage temporarily not be expectation value (that is downgrading or heighten reference voltage), revert to this expectation value to accelerate this feedback voltage.
Fig. 5 shows an embodiment of the detailed construction of bust detecting voltage module 307 shown in Figure 4.As shown in Figure 5, bust detecting voltage module 307 comprises a comparer 501 and a pulse signal generation module 503.Comparer 501 is in order to compare magnitude of voltage and the first predetermined voltage V of feedback signal FB
Under, when feedback signal FB less than the first predetermined voltage V
UnderThe time, i.e. expression has the situation of voltage die to take place, and pulse signal generation module 503 produces a pulse signal with as bust voltage instruction signal V
DExcept comparer 501 and pulse signal generation module 503, bust detecting voltage module 307 can also comprise one and intercept circuit 505, in order to intercept its noise section before entering comparer 501 at feedback signal FB.The noise section general reference that intercepts circuit 505 obstructs occurs on the feedback signal FB, may cause the noise of comparer 501 erroneous judgements.
In this embodiment, pulse signal generation module 503 comprises: pulse generator 507, SR flip-flop 509,511 and adjustable delay line 513.Pulse generator 507 in order at the magnitude of voltage of feedback signal FB less than the first predetermined voltage V
UnderThe time produce a pulse.The input end received pulse signal of SR flip-flop 509, its replacement termination is received a delay output signal DOS, and its output terminal output bust voltage instruction signal V
DThe input end received pulse signal of SR flip-flop 511, its replacement termination is received a delay output signal DOS, and its output terminal is exported an output signal OS.Adjustable delay line 513 in order to delay output signal OS to produce delay output signal DOS.By pulse generator 507, SR flip-flop 509,511 and adjustable delay line 513 operate jointly, can produce a pulse signal with as bust indicator signal V
D, and the pulse bandwidth of its pulse signal can be controlled by adjustable delay line 513.Those of ordinary skill in the art when can push away easily how to utilize pulse generator 507, SR flip-flop 509,511 and adjustable delay line 513 produce the pulse signal of institute's palpus, so do not repeat them here.
Fig. 6 shows an embodiment of the detailed construction of the detecting voltage module 309 that jumps shown in Figure 4.As shown in Figure 6, the detecting voltage module 309 that jumps comprises: comparer 601, pulse signal generation module 603 and intercept circuit 605.Comparer 601 is in order to compare feedback signal FB and the second predetermined voltage V
Over, if the magnitude of voltage of feedback signal FB is greater than the second predetermined voltage V
Over, then the situation that voltage jumps takes place in representative.Pulse signal generation module 603 in order at the magnitude of voltage of feedback signal FB greater than the second predetermined voltage V
OverThe time produce a pulse signal PWM.Intercept circuit 605 in order to intercept bust voltage instruction signal V
DNoise and according to bust voltage instruction signal V
DAnd the comparative result start pulse signal generation module 603 of comparer 601 is with the generation voltage instruction signal VR that jumps.In this embodiment, pulse signal generation module 603 has and pulse signal generation module 503 components identical: pulse generator 607, SR flip-flop 609,611 and adjustable delay line 613.
Pulse signal generation module 603 and pulse signal generation module 503 differences are: the compare result signal that the pulse generator 507 of pulse signal generation module 503 receives from comparer 501, and the pulse generator 607 of pulse signal generation module 603 receives from the output signal that intercepts circuit 605.Other action of pulse signal generation module 603 is identical with pulse signal generation module 503 with structure, so do not repeat them here.
Fig. 7 shows a wherein embodiment of controllable type voltage supply module 305 shown in Figure 4.As shown in Figure 7, controllable type voltage supply module 305 comprises: on-off element 701 is coupled to the second voltage V
2On-off element 703 is coupled to tertiary voltage V
3Bust voltage instruction signal V wherein
DWhether conducting of gauge tap element 701, and the voltage instruction signal V that jumps
RWhether conducting of gauge tap element 703.When there not being bust voltage instruction signal V
DWith the voltage instruction signal V that jumps
RThe time, just export the first voltage V
1As output voltage.By the conducting and not conducting of on-off element 701 with on-off element 703, can change reference voltage V
Ref, bust voltage instruction signal V for example ought appear
DThe time, on-off element 701 conductings, reference voltage V
RefMagnitude of voltage just by the first voltage V
1With the second voltage V
2Determine.In addition, also can include an on-off element (not shown) in the another embodiment of the present invention and be coupled to the first voltage V
1, and by bust voltage instruction signal V
DWith the voltage instruction signal V that jumps
RThe whether conducting of common this on-off element of control also can reach similar effect.Those of ordinary skill in the art ought understand its embodiment easily, so no longer in addition to illustrate.
Fig. 8 shows the more specific embodiment of circuit diagram shown in Figure 5, asks mutual comparison diagram 5 and Fig. 8 more to understand circuit structure shown in Figure 5.It is noted that circuit structure shown in Figure 8 in order to for example, is not in order to limit the present invention only.As shown in Figure 8, obstruct circuit 505 shown in Figure 5 is incorporated in the comparer 501.Switch 801, resistance 803 and frequency source CLK
1As a switch module, to determine whether signal passes through.Pulse generator 507 comprises an AND door 805, phase inverter 807,809,811 and differential amplifier 813.Adjustable delay line 513 comprises phase inverter 815, AND door 817 and comparer 819.Switch 821, resistance 823 and frequency source CLK
2As a switch module, to determine whether signal passes through.Those of ordinary skill in the art can learn the action of circuit structure shown in Figure 8 easily via circuit structure shown in Figure 8 and aforesaid describing mode, so do not repeat them here.
Fig. 9 shows the more specific embodiment of circuit diagram shown in Figure 6.Circuit structure shown in Figure 9 is identical haply with circuit structure shown in Figure 8, and its difference has been more than circuit structure shown in Figure 9 and the circuit structure shown in Figure 8 obstruct circuit 605.XOR gate 901, AND door 903 and comparer 905 have been comprised and intercept circuit 605 in this embodiment.Those of ordinary skill in the art can learn the action of circuit structure shown in Figure 9 easily via circuit structure shown in Figure 9 and aforesaid describing mode, so do not repeat them here.
Figure 10 shows the voltage synoptic diagram that use voltage-regulating circuit according to the present invention produces.Particularly, Figure 10 shows when the voltage die situation takes place, the voltage synoptic diagram that how to use voltage-regulating circuit according to the present invention to compensate.Wherein, voltage curve Org has represented when the voltage die situation takes place in the prior art, and the voltage curve of any compensation mechanism is not arranged.Voltage curve Case1 and Case2 have then represented the voltage curve that uses voltage-regulating circuit according to the present invention to come the bucking voltage bust to produce.By voltage curve Org as can be known, when voltage die takes place, have sizable voltage drop, therefore cause erroneous judgement easily.And under the situation of Case1 and Case2, after voltage die took place, reference voltage can be from V shown in Figure 10
1Change over V
2And cause the phenomenon that draws high of voltage by this, and the time that voltage draws high can be proportional to voltage die indicator signal V
DThe time of high levels, (that is reference voltage was V
2) time.
In example shown in Figure 10, the voltage die indicator signal V of Case1 and Case2
DHave two kinds of different high levels times (namely having different pulse widths).So the time that voltage draws high is also different.Particularly, when voltage die took place in Case1, reference voltage was at t
1Can be from V in time
1Change over V
2, so voltage is at t
1Can corresponding being drawn high in time.Same, when voltage die took place in Case2, reference voltage was at t
2Can be from V in time
1Change over V
2, so voltage is at t
2Can corresponding being drawn high in time.That is to say that the present invention can correspond to the time of voltage die, change the reformed time length of reference voltage, make voltage comparatively stable to draw high voltage.From voltage curve Org, Case1 and Case2 can find out have the voltage curve Case1 of compensation mechanism and Case2 comparatively steady compared with the voltage curve Org of uncompensated mechanism, more can not cause erroneous judgement.
Figure 11 shows the voltage synoptic diagram that use voltage-regulating circuit according to the present invention produces.Particularly, Figure 11 shows when the voltage situation that jumps takes place, the voltage synoptic diagram that how to use voltage-regulating circuit according to the present invention to compensate.Similar to FIG. 10, voltage curve Org has represented when the voltage situation that jumps takes place in the prior art, and the voltage curve of any compensation mechanism is not arranged.Voltage curve Case3 and Case4 have then represented the voltage curve that uses voltage-regulating circuit according to the present invention to come the bucking voltage bust to produce.By voltage curve Org as can be known, when voltage jumps generation, have sizable voltage drop, therefore cause erroneous judgement easily.And under the situation of Case3 and Case4, after voltage jumped generation, reference voltage can be from V shown in Figure 11
1Change over V
3So that voltage descends, and the time that voltage descends can be proportional to the voltage indicator signal V that jumps
RThe time of low level, (that is reference voltage was V
3) time.
In example shown in Figure 11, the voltage of Case3 and the Case4 indicator signal V that jumps
RHave two kinds of different low level times (namely having different pulse widths).Therefore the time of voltage decline is also different.Particularly, when voltage jumped generation, reference voltage was at t in Case3
3Can be from V in time
1Change over V
3, so voltage is at t
3Can corresponding being dragged down in time.Same, when voltage jumped generation, reference voltage was at t in Case4
4Can be from V in time
1Change over V
4, so voltage is at t
4Can corresponding being dragged down in time.And as can be seen from Figure 11, at t
5, t
6Similar voltage relationship was arranged in the time.That is to say that the present invention can correspond to the time that voltage jumps, change the reformed time length of reference voltage, make voltage comparatively stable to reduce voltage.From voltage curve Org, Case3 and Case4 can find out have the voltage curve Case3 of compensation mechanism and Case4 comparatively steady compared with the voltage curve Org of uncompensated mechanism, more can not cause erroneous judgement.
According to the above embodiments, whether reference voltage provides the circuit can be according to having voltage to jump or the reference voltage that provides is provided the voltage die phenomenon.Therefore but the voltage-regulating circuit bucking voltage jumps or voltage die phenomenon and stable output voltage is provided.
The above only is preferred embodiment of the present invention, and all equalizations of doing according to claim of the present invention change and modify, and all should belong to covering scope of the present invention.
Claims (13)
1. a reference voltage provides circuit, it is characterized in that, in order to reference voltage to an error amplifier to be provided, this error amplifier is this reference voltage and a feedback voltage relatively, and this reference voltage provides circuit to comprise:
One detecting voltage module is in order to detect this feedback voltage to produce a control signal; And
One controllable type voltage supply module, in order to provide this reference voltage according to this control signal, when this feedback voltage departs from an expectation value in a preset range time, this reference voltage provides circuit roughly to provide this expectation value as this reference voltage, and when this feedback voltage departs from this expectation value above this preset range, this reference voltage provides circuit to make this reference voltage temporarily not be this expectation value, revert to this expectation value to accelerate this feedback voltage.
2. reference voltage according to claim 1 provides circuit, it is characterized in that, this detecting voltage module produces a pulse signal with as this control signal.
3. reference voltage according to claim 1 provides circuit, it is characterized in that, this detecting voltage module comprises:
Whether one bust detecting voltage module is lower than one first predetermined voltage to produce a bust voltage instruction signal with as this control signal in order to detect this feedback voltage; And
Whether the one detecting voltage module that jumps is higher than one second predetermined voltage and jumps voltage instruction signal with as this control signal to produce one in order to detect this feedback voltage.
4. reference voltage according to claim 3 provides circuit, it is characterized in that, this bust detecting voltage module comprises:
One comparer is in order to relatively this feedback voltage and this first predetermined voltage; And
One pulse signal generation module is in order to produce a pulse signal during less than this first predetermined voltage with as this bust voltage instruction signal at this feedback voltage.
5. reference voltage according to claim 3 provides circuit, it is characterized in that, this controllable type voltage supply module comprises:
One scheduled voltage is in order to provide a predetermined voltage;
One first switch is coupled to one first voltage, controlled by this bust voltage instruction signal; And
One second switch is coupled to one second voltage, controlled by this voltage instruction signal that jumps.
6. a voltage-regulating circuit is characterized in that, comprises
One voltage regulator module is adjusted voltage in order to produce one according to a comparative result;
One error amplifier, in order to relatively corresponding to a feedback voltage of this adjustment voltage and a reference voltage to produce this comparative result; And
One reference voltage provides circuit, in order to detect this feedback voltage, so that this reference voltage to be provided, wherein, when this feedback voltage departs from an expectation value in a preset range time, this reference voltage provides circuit roughly to provide this expectation value as this reference voltage, and when this feedback voltage departs from this expectation value above this preset range, this reference voltage provides circuit to make this reference voltage temporarily not be this expectation value, revert to this expectation value to accelerate this feedback voltage, and this reference voltage provides circuit to comprise:
One detecting voltage module is in order to detect this feedback voltage to produce a control signal; And
One controllable type voltage supply module is in order to provide this reference voltage according to this control signal.
7. voltage-regulating circuit according to claim 6 is characterized in that, this detecting voltage module produces a pulse signal with as this control signal.
8. voltage-regulating circuit according to claim 6 is characterized in that, this detecting voltage module comprises:
One bust detecting voltage module is detected this feedback voltage, and when this feedback voltage is lower than one first predetermined voltage, produces a bust voltage instruction signal with as this control signal; And
The one detecting voltage module that jumps is detected this feedback voltage, and when this feedback voltage is higher than one second predetermined voltage, produces one and jumps voltage instruction signal with as this control signal.
9. voltage-regulating circuit according to claim 8 is characterized in that, this bust detecting voltage module comprises:
One comparer is in order to relatively this feedback voltage and this first predetermined voltage; And
One pulse generation module is in order to produce a pulse signal during less than this first predetermined voltage with as this bust voltage instruction signal at this magnitude of voltage of this feedback voltage.
10. voltage-regulating circuit according to claim 9 is characterized in that, also comprises one and intercepts circuit, in order to intercept the noise section of this feedback signal before entering this comparer in this feedback signal.
11. voltage-regulating circuit according to claim 8 is characterized in that, this controllable type voltage supply module comprises:
One scheduled voltage is in order to provide a predetermined voltage;
One first switch is coupled to one first voltage, controlled by this bust voltage instruction signal; And
One second switch is coupled to one second voltage, controlled by this voltage instruction signal that jumps.
12. a reference voltage method is provided, it is characterized in that in order to reference voltage to an error amplifier to be provided, this error amplifier is this reference voltage and a feedback voltage relatively, this method includes:
Detect this feedback voltage;
When this feedback voltage departs from an expectation value in a preset range time, make this reference voltage be substantially equal to this expectation value; And
When this feedback voltage departs from this expectation value above this preset range, make this reference voltage temporarily not be this expectation value, revert to this expectation value to accelerate this feedback voltage.
13. method according to claim 12 is characterized in that, includes:
Control a voltage regulator module according to this error amplifier, adjust voltage to produce one;
Wherein, this feedback voltage is adjusted voltage corresponding to this.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910129256 CN101853039B (en) | 2009-04-03 | 2009-04-03 | Reference voltage supplying circuit, reference voltage supplying method and voltage regulating circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910129256 CN101853039B (en) | 2009-04-03 | 2009-04-03 | Reference voltage supplying circuit, reference voltage supplying method and voltage regulating circuit |
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| Publication Number | Publication Date |
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| CN101853039A CN101853039A (en) | 2010-10-06 |
| CN101853039B true CN101853039B (en) | 2013-08-21 |
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| CN102611333B (en) * | 2011-01-24 | 2014-10-22 | 立锜科技股份有限公司 | Controller of power converter and control method of power converter |
| CN102740541B (en) * | 2011-04-15 | 2016-05-11 | 登丰微电子股份有限公司 | Switching controller |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6605931B2 (en) * | 2000-11-07 | 2003-08-12 | Microsemi Corporation | Switching regulator with transient recovery circuit |
| US7292018B2 (en) * | 2006-04-07 | 2007-11-06 | Aimtron Technology Corp. | Reverse current preventing circuit with an automatic correction of reference |
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| JP2009038146A (en) * | 2007-07-31 | 2009-02-19 | Nidec-Read Corp | Substrate processing device |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6605931B2 (en) * | 2000-11-07 | 2003-08-12 | Microsemi Corporation | Switching regulator with transient recovery circuit |
| US7292018B2 (en) * | 2006-04-07 | 2007-11-06 | Aimtron Technology Corp. | Reverse current preventing circuit with an automatic correction of reference |
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| CN101853039A (en) | 2010-10-06 |
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