CN107404225A - Voltage regulator circuit and method - Google Patents
Voltage regulator circuit and method Download PDFInfo
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- CN107404225A CN107404225A CN201710572421.5A CN201710572421A CN107404225A CN 107404225 A CN107404225 A CN 107404225A CN 201710572421 A CN201710572421 A CN 201710572421A CN 107404225 A CN107404225 A CN 107404225A
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- storage capacitor
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- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000003990 capacitor Substances 0.000 claims abstract description 47
- 239000004065 semiconductor Substances 0.000 claims description 16
- 230000005611 electricity Effects 0.000 claims description 4
- 238000004146 energy storage Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004087 circulation Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 102220008337 rs1437698471 Human genes 0.000 description 1
- 102220065682 rs77311724 Human genes 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/02—Conversion of DC power input into DC power output without intermediate conversion into AC
- H02M3/04—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters
- H02M3/10—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0048—Circuits or arrangements for reducing losses
- H02M1/0054—Transistor switching losses
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
- Direct Current Feeding And Distribution (AREA)
Abstract
The invention discloses a kind of voltage regulator circuit and method, including：Drive control circuit, first and second switching tube, first and second one-way conduction element and storage capacitor.Drive control circuit drives end and first, second switch pipe control terminal connects, the end of first switch pipe second connection input voltage one end, the input voltage other end is as output voltage one end, the other end of the second switch pipe first end as output voltage, first switch pipe first end connects described storage capacitor one end, the storage capacitor other end is connected with first one-way conduction element one end, first one-way conduction element other end connection output voltage one end, the end of second switch pipe second is connected with the common port of first switch pipe and storage capacitor, second one-way conduction element one end connects one end of input voltage, the second one-way conduction element other end connects the common port of storage capacitor and the first one-way conduction element.The present invention solves the problems, such as that high-tension circuit power attenuation is larger, reduces power attenuation.
Description
Technical field
The present invention relates to electric and electronic technical field, in particular, is related to a kind of voltage regulator circuit and method.
Background technology
Voltage regulator circuit receives input voltage, and according to the demand of load or use occasion, exports expected export
Voltage, all have been widely used in many occasions.Voltage regulator circuit is commonplace in the application of low voltage difference occasion, such as low
Pressure difference voltage-stablizer (low dropout regulator, LDO), at present voltage regulator circuit have begun to towards high pressure field send out
Exhibition, but prior art voltage regulator circuit high pressure field there is power consumption penalty than it is more serious the problem of.
Such as Fig. 1, for the schematic diagram applied in high pressure of voltage regulator circuit of prior art, wherein control circuit such as Fig. 2
It is shown.Drive control circuit on one side VS is set to be equal to predeterminated voltage VREF1, by linear adjustment switching tube M20 driving voltage,
So that the electric current i21=i20-I0 that VS is flowed into, therefore output voltage stabilization is Vout=i20*R20-i21*R21+VCC-VS=
I20*R20-i21*R21+V40-VREF1, as R20=R21=R0, Vout=R0* (i20-i21)+V40-VREF1=R0*
I0+V40-VREF1, and the first difference between current I0 is definite value, then Vout is only relevant with R0, and R0 determines that Vout is constant pressure, so that
It is constant to obtain output voltage.But during this, if input and output voltage is especially big, the loss in circuit is become very
Greatly.Such as input voltage is 1200V, output voltage is 700V, then (1200-700) V*I=500V*I work(is have lost in circuit
Rate, therefore prior art power consumption penalty in the voltage-regulation of high pressure field is bigger.
The content of the invention
In view of this, the present invention proposes a kind of voltage regulator circuit and method, power damage be present for solving prior art
Lose excessive technical problem.
The invention provides a kind of voltage regulator circuit, including drive control circuit, first switch pipe, second switch pipe,
First one-way conduction element, the second one-way conduction element and storage capacitor；The drive end of the drive control circuit respectively with institute
The control terminal for stating first switch pipe connects with the control terminal of the second switch pipe, for adjusting the first switch pipe and second
The on off state of switching tube, the first switch pipe the second end connection input voltage one end, the input voltage it is another
Hold one end as output voltage, the other end of the first end of the second switch pipe as output voltage, the first switch
The first end of pipe connects one end of one end of the storage capacitor, the other end of the storage capacitor and the first one-way conduction element
Connection, the first one-way conduction element the other end connection output voltage one end, the second end of the second switch pipe with
First switch pipe connects with the common port of storage capacitor, one end connection input and output voltage of the second one-way conduction element
Current potential common port, the second one-way conduction element the other end connection storage capacitor and the first one-way conduction element it is public
End.
Optionally, the cold end of the second end connection input voltage of the first switch pipe, the height of the input voltage
Hot end of the potential end as output voltage, the cold end of the first end of the second switch pipe as output voltage, institute
State the cold end of the positive pole connection output voltage of the first one-way conduction element, the negative pole of the first one-way conduction element and institute
The one end for stating storage capacitor connects, the first end of the other end connection first switch pipe of the storage capacitor, and described second
The positive pole of one-way conduction element is connected with the common port of the first one-way conduction element and storage capacitor, the second one-way conduction member
The hot end of the negative pole connection input voltage of part, the second end of the second switch pipe and storage capacitor and first switch pipe
Common port connects.
Optionally, the first switch pipe the second end connection input voltage hot end, the input voltage it is low
Cold end of the potential end as output voltage, the hot end of the first end of the second switch pipe as output voltage, institute
The first end for stating first switch pipe is connected with storage capacitor, and the other end of storage capacitor is connecting the first one-way conduction element just
Pole, the hot end of the negative pole connection output voltage of the first one-way conduction element, the second one-way conduction element is just
Pole connects the cold end of input voltage, the negative pole of the second one-way conduction element and the first one-way conduction element and energy storage electricity
The common port connection of appearance, the second end of the second switch pipe is connected with the common port of storage capacitor and first switch pipe.
Optionally, the first switch pipe and the second switch pipe are N-type metal-oxide-semiconductors, and described first end is N-type MOS
The drain electrode of pipe, the second described end are the source electrode of N-type metal-oxide-semiconductor, and described control terminal is the grid of N-type metal-oxide-semiconductor.
Optionally, the first switch pipe and the second switch pipe are p-type metal-oxide-semiconductors, and described first end is p-type MOS
The drain electrode of pipe, the second described end are the source electrode of p-type metal-oxide-semiconductor, and described control terminal is the grid of p-type metal-oxide-semiconductor.
Optionally when input voltage is less than preset voltage value, drive control circuit causes first switch pipe and second
Switching tube all turns on；
When input voltage is higher than preset voltage value, drive control circuit is by controlling first switch pipe and second switch pipe
Turn-on and turn-off so that output voltage be less than or equal to input voltage half.
Optionally, when input voltage is higher than preset voltage value, control first switch pipe and second switch pipe conducting and
Shut-off makes it be operated in two states, is the shut-off of first switch pipe conducting second switch pipe, first switch pipe shut-off second respectively
Switching tube turns on, and when the voltage of storage capacitor and the difference of output voltage are less than the first difference, first switch pipe turns on, and second
Switching tube turns off；When the voltage of storage capacitor and the difference of output voltage are more than the second difference, the shut-off of first switch pipe, second
Switching tube turns on.
Optionally, when input voltage is higher than preset voltage value, control first switch pipe and second switch pipe conducting and
Shut-off makes it be operated in two states, is the shut-off of first switch pipe conducting second switch pipe, first switch pipe shut-off second respectively
Switching tube is turned on, and the switching of the two states after one state continues the regular hour, is switched in addition by the use of the time as foundation
One state.
Optionally, when input voltage is higher than preset voltage value, control first switch pipe and second switch pipe conducting and
Shut-off causes there are two states, is the shut-off of first switch pipe conducting second switch pipe, first switch pipe shut-off second switch respectively
Pipe turns on, and when the voltage of storage capacitor and the difference of output voltage are less than the first difference, first switch pipe turns on second switch
Pipe turns off, after continuing the regular hour, the shut-off second switch pipe conducting of first switch pipe；
Or when the voltage of storage capacitor and the difference of output voltage are more than the second difference, first switch pipe shut-off the
Two switching tubes turn on, after continuing the regular hour, the conducting second switch pipe shut-off of first switch pipe.
The invention provides a kind of voltage adjusting method, based on above-mentioned voltage regulator circuit, including：
When input voltage is less than preset voltage value, drive control circuit causes first switch pipe and second switch pipe
All turn on；
When input voltage is higher than preset voltage value, drive control circuit first switch pipe and second switch pipe are led
Logical and shut-off so that output voltage is less than or equal to the half of input voltage.
Compared with prior art, the technical scheme of the present invention has advantages below：The present invention is led to using drive control circuit
Overvoltage, time or voltage and three kinds of criterion modes of time drive the conducting of first switch pipe and second switch pipe and pass
It is disconnected, the switching of two states of two switching tube turn-on and turn-off is completed, and utilize the storage capacitor and one-way conduction in circuit
Element so that input voltage is less than the half of output voltage, so as to reach the purpose for reducing power consumption.The present invention can solve high pressure
The problem of mu balanced circuit power attenuation is larger, reduces power attenuation.
Brief description of the drawings
Fig. 1 is prior art voltage regulator circuit part-structure schematic diagram：
Fig. 2 is the drive control circuit part structural representation of prior art voltage regulator circuit；
Fig. 3 is the part-structure schematic diagram of voltage regulator circuit embodiment one of the present invention；
Fig. 4 is the detailed construction schematic diagram of voltage regulator circuit embodiment one of the present invention；
Fig. 5 is the part-structure schematic diagram of voltage regulator circuit embodiment two of the present invention；
Embodiment
The preferred embodiments of the present invention are described in detail below in conjunction with accompanying drawing, but the present invention is not restricted to these
Embodiment.The present invention covers any replacement made in the spirit and scope of the present invention, modification, equivalent method and scheme.
Thoroughly understand in order that the public has to the present invention, be described in detail in present invention below preferred embodiment specific
Details, and description without these details can also understand the present invention completely for a person skilled in the art.
More specifically description is of the invention by way of example referring to the drawings in the following passage.It should be noted that accompanying drawing is adopted
Non- accurately ratio is used with more simplified form and, only to convenience, lucidly aid in illustrating the embodiment of the present invention
Purpose.
As shown in figure 3, a kind of circuit structure of voltage-regulation of the present invention is illustrated, as embodiment one as elaboration.Bag
Include：Drive control circuit, first switch pipe M1, second switch pipe M2, the first diode D1, the second diode D2 and storage capacitor
C2.First switch pipe M1, second switch pipe M2 are N-type metal-oxide-semiconductor.The drive end of the drive control circuit is respectively with described
The grid of one switching tube connects with the grid of the second switch pipe, for adjusting the first switch pipe and second switch pipe
On off state.The cold end of the source electrode connection input voltage of the first switch pipe M1, the hot end of the input voltage
As the hot end of output voltage, the cold end to drain as output voltage of the second switch pipe M2.Described first
Diode D1 positive pole and the cold end of output voltage connect, negative pole and storage capacitor C2 one end of the first diode D1
Connection, the other end of the storage capacitor C2 is connected with first switch pipe M1 drain electrode, the positive pole of the second diode D2 and
First diode D1 connects with storage capacitor C2 common port, the negative pole of the second diode D2 and the high potential of input voltage
End connection, the source electrode of the second switch pipe M2 are connected with first switch pipe M1 and storage capacitor C2 common port.
Assuming that when voltage is higher than Vm, for Vm as preset voltage value, the power consumption in circuit is serious.Therefore at this time, it may be necessary to
Using drive control circuit come the grid voltage of switching tube M1 and M2 in control figure 3, and then the turn-on and turn-off of controlling switch pipe
The change of state.So that：
1. work as Vin≤Vm, M1 and M2 to be both turned on.
2. work as Vin ＞ Vm, by controlling switch pipe M1 and M2 turn-on and turn-off come Vout≤Vin/2.
Herein, (M1 turn on, M2 shut-off), (M1 is turned off, M2 conductings) two states switching can be by the use of voltage as sentencing
According to；The time can also be used as criterion mode；Or judge that the combination with the time is used as criterion foundation using voltage.Here
Only it is shown in detail by way of voltage is as criterion, under the simple introduction of other two ways, but this mesh can be reached
Way, be all within the scope of the present invention.
By voltage criterion mode come controlling switch pipe M1 and M2 turn-on and turn-off.
2.1 when Vc2 ＜ Vout- Δs V1, M1 conductings, M2 shut-offs；
2.2 when Vc2 ＞ Vout+ Δs V2, M1 shut-offs, M2 conductings.
2.3 constantly repeat 2.1 and 2.2 circulations.
The voltage on electric capacity C2 that wherein Vc2 is represented.Δ V1 as the first difference, Δ V2 as the second difference, and Δ V1,
Δ V2 is setting value.
When input voltage determines, can by changing Δ V1, Δ V2 value obtain different Vout values.
The design be mainly used to reduce input voltage it is excessive when power consumption penalty.As input voltage vin ＞ Vm, just start
Vc2 ＜ Vout- Δ V1, M1 conductings, M2 shut-offs, i.e., as shown in phantom in Figure 3, input voltage vin is to electricity for the running route of circuit
Hold C2 to be charged, Vin ≈ Vc2+Vout.Charge always when as Vc2 ＞ Vout+ Δ V2, then M1 is turned off, M2 conductings, i.e.,
The running route of circuit starts Vc2 discharge process as shown in dotted line in Fig. 3, until Vc2 ＜ Vout- Δs V1, M1 turn on,
M2 is turned off, and is restarted to charge to Vc2, is circulated this process always.
During C2 charging completes, the voltage in circuit is respectively Vout and Vc2；After the completion of electric discharge, the voltage in circuit is changed into
Vout=Vc2=(Vout+Vc2)/2, andThen the energy loss during this is：
As long as therefore enable to Vout close to Vc2, i.e. the power consumption of Vout ≈ Vout ≈ Vin/2 then whole circuits is minimum
, close to zero loss.As Vout ＜ Vin/2, the power dissipation ratio prior art of circuit substantially reduces in the present invention, so as to improve
When input voltage is excessive, the problem of power attenuation is excessive.
When passage time criterion mode carrys out controlling switch pipe M1 and M2 turn-on and turn-off, usually a state continues one
After the section time, another state is switched to.
When being used as by voltage judgement and the combination of time according to the turn-on and turn-off for coming controlling switch pipe M1 and M2, work as storage
When the energy voltage of electric capacity and the difference of output voltage are less than the first difference, the conducting second switch pipe shut-off of first switch pipe, continue
After regular hour, the shut-off second switch pipe conducting of first switch pipe；
Or when the voltage of storage capacitor and the difference of output voltage are more than the second difference, the shut-off of first switch pipe, the
Two switching tubes turn on, after continuing the regular hour, the conducting second switch pipe shut-off of first switch pipe.
Drive control circuit in Fig. 3 is a sketch, and generally, drive control circuit is as shown in figure 4, bag
5 ports are included, are feeder ear respectively, first end, the second end, the first drive end, the second drive end.The feeder ear is through resistance R0
It is connected with the high potential of input voltage, the voltage of feeder ear is clamped to supply voltage, and the first end is through resistance R1 and switch
Pipe M2 drain electrode connection, second end are connected with switching tube M1 source electrode, the grid of first drive end and switching tube M1
Connection, second drive end are connected with switching tube M2 grid.Fig. 4 is a kind of a kind of form of drive control circuit.
As shown in figure 5, a kind of circuit structure of voltage-regulation of the present invention is illustrated, as embodiment two as elaboration.Bag
Include：Drive control circuit, first switch pipe M1, second switch pipe M2, the first diode D1, the second diode D2, storage capacitor
C2.First switch pipe M1, second switch pipe M2 are p-type metal-oxide-semiconductor.The drive end of the drive control circuit is respectively with described
The grid of one switching tube connects with the grid of the second switch pipe, for adjusting the first switch pipe and second switch pipe
On off state.The hot end of the source electrode connection input voltage of the first switch pipe M1, the cold end of the input voltage
As the cold end of output voltage, the hot end to drain as output voltage of the second switch pipe, described first opens
The drain electrode for closing pipe M1 is connected with one end of the storage capacitor C2, the other end of the storage capacitor C2 and first diode
D1 positive pole connection, the hot end of the negative pole connection output voltage of the first diode D1, the second diode D2's
Positive pole connects the cold end of output voltage, negative pole and the storage capacitor C2 and the described 1st of the second diode D2
Pole pipe D1 common port connection, the source electrode of the second switch pipe M2 is with the first switch pipe M1's and storage capacitor C2
Common port connects.
Assuming that when voltage is higher than Vm, for Vm as preset voltage value, the power consumption in circuit is serious.Therefore at this time, it may be necessary to
Using drive control circuit come the grid voltage of switching tube M1 and M2 in control figure 5, and then the turn-on and turn-off of controlling switch pipe
The change of state.So that：
1. work as Vin≤Vm, M1 and M2 to be both turned on.
2. work as Vin ＞ Vm, by controlling switch pipe M1 and M2 turn-on and turn-off come Vout≤Vin/2.
The control mode of drive control circuit and process are identical with the method for example one in embodiment two.
Although embodiment is separately illustrated and illustrated above, it is related to the common technology in part, in ordinary skill
Personnel apparently, can be replaced and integrate between the embodiments, be related to one of embodiment and the content recorded is not known, then
Refer to another embodiment on the books.
Embodiments described above, the restriction to the technical scheme protection domain is not formed.It is any in above-mentioned implementation
Modifications, equivalent substitutions and improvements made within the spirit and principle of mode etc., should be included in the protection model of the technical scheme
Within enclosing.
Claims (10)
1. a kind of voltage regulator circuit, including drive control circuit, first switch pipe, second switch pipe, the first one-way conduction member
Part, the second one-way conduction element and storage capacitor, it is characterised in that：
The drive end of the drive control circuit respectively with the control terminal of the first switch pipe and the control of the second switch pipe
End connection processed, for adjusting the on off state of the first switch pipe and second switch pipe, the second end of the first switch pipe
Connect one end of input voltage, the one end of the other end of the input voltage as output voltage, the of the second switch pipe
The other end of the one end as output voltage, the first end of the first switch pipe connect one end of the storage capacitor, the storage
The other end of energy electric capacity is connected with one end of the first one-way conduction element, and the other end connection of the first one-way conduction element is defeated
Going out one end of voltage, the second end of the second switch pipe is connected with the common port of first switch pipe and storage capacitor, and described
The current potential common port of one end connection input and output voltage of two one-way conduction elements, the other end of the second one-way conduction element
Connect the common port of storage capacitor and the first one-way conduction element.
2. voltage regulator circuit according to claim 1, it is characterised in that：The second end connection of the first switch pipe is defeated
Enter the cold end of voltage, the hot end of the hot end of the input voltage as output voltage, the second switch pipe
Cold end of the first end as output voltage, the low potential of the positive pole connection output voltage of the first one-way conduction element
End, the negative pole of the first one-way conduction element are connected with one end of the storage capacitor, and the other end of the storage capacitor connects
Connect the first end of the first switch pipe, the positive pole of the second one-way conduction element and the first one-way conduction element and energy storage electricity
The common port connection of appearance, the hot end of the negative pole connection input voltage of the second one-way conduction element, the second switch
Second end of pipe is connected with the common port of storage capacitor and first switch pipe.
3. voltage regulator circuit according to claim 1, it is characterised in that：The second end connection of the first switch pipe is defeated
Enter the hot end of voltage, the cold end of the cold end of the input voltage as output voltage, the second switch pipe
Hot end of the first end as output voltage, the first end of the first switch pipe is connected with storage capacitor, storage capacitor
The other end connect the first one-way conduction element positive pole, the first one-way conduction element negative pole connection output voltage height
Potential end, the cold end of the positive pole connection input voltage of the second one-way conduction element, the second one-way conduction element
Negative pole be connected with the common port of the first one-way conduction element and storage capacitor, the second end of the second switch pipe and energy storage electricity
Appearance connects with the common port of first switch pipe.
4. voltage regulator circuit according to claim 2, it is characterised in that：The first switch pipe and the second switch
Pipe is N-type metal-oxide-semiconductor, and described first end is the drain electrode of N-type metal-oxide-semiconductor, and the second described end is the source electrode of N-type metal-oxide-semiconductor, described
Control terminal is the grid of N-type metal-oxide-semiconductor.
5. voltage regulator circuit according to claim 3, it is characterised in that：The first switch pipe and the second switch
Pipe is p-type metal-oxide-semiconductor, and described first end is the drain electrode of p-type metal-oxide-semiconductor, and the second described end is the source electrode of p-type metal-oxide-semiconductor, described
Control terminal is the grid of p-type metal-oxide-semiconductor.
6. according to the voltage regulator circuit described in claim 1-5 any one, it is characterised in that：
When input voltage is less than preset voltage value, drive control circuit make it that first switch pipe and second switch pipe are whole
Conducting；
When input voltage is higher than preset voltage value, drive control circuit is by controlling leading for first switch pipe and second switch pipe
Logical and shut-off so that output voltage is less than or equal to the half of input voltage.
7. voltage regulator circuit according to claim 6, it is characterised in that：When input voltage is higher than preset voltage value,
The turn-on and turn-off of control first switch pipe and second switch pipe make it be operated in two states, are the conducting of first switch pipe respectively
The shut-off of second switch pipe, the shut-off second switch pipe conducting of first switch pipe, when the voltage of storage capacitor and the difference of output voltage
During less than the first difference, the conducting of first switch pipe, the shut-off of second switch pipe；When the voltage of storage capacitor and the difference of output voltage
During more than the second difference, the shut-off of first switch pipe, the conducting of second switch pipe.
8. voltage regulator circuit according to claim 6, it is characterised in that：When input voltage is higher than preset voltage value,
The turn-on and turn-off of control first switch pipe and second switch pipe make it be operated in two states, are the conducting of first switch pipe respectively
The shut-off of second switch pipe, the shut-off second switch pipe conducting of first switch pipe, the switchings of the two states is by the use of the time as foundation, and one
After individual state continues the regular hour, another state is switched to.
9. voltage regulator circuit according to claim 6, it is characterised in that：When input voltage is higher than preset voltage value,
The turn-on and turn-off of control first switch pipe and second switch pipe cause there are two states, are first switch pipe conducting second respectively
Switching tube shut-off, the shut-off second switch pipe conducting of first switch pipe, when the voltage of storage capacitor and the difference of output voltage are less than
During the first difference, the conducting second switch pipe shut-off of first switch pipe, after continuing the regular hour, first switch pipe shut-off second
Switching tube turns on；
Or when the voltage of storage capacitor and the difference of output voltage are more than the second difference, first switch pipe shut-off second is opened
Pipe conducting is closed, after continuing the regular hour, the conducting second switch pipe shut-off of first switch pipe.
10. a kind of voltage adjusting method, based on the voltage regulator circuit of claim 1-5 any one, including：
When input voltage is less than preset voltage value, drive control circuit make it that first switch pipe and second switch pipe are whole
Conducting；
When input voltage is higher than preset voltage value, the conducting of drive control circuit first switch pipe and second switch pipe and
Shut-off so that output voltage is less than or equal to the half of input voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710572421.5A CN107404225B (en) | 2017-07-13 | 2017-07-13 | Voltage regulating circuit and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710572421.5A CN107404225B (en) | 2017-07-13 | 2017-07-13 | Voltage regulating circuit and method |
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| CN107404225A true CN107404225A (en) | 2017-11-28 |
| CN107404225B CN107404225B (en) | 2023-06-23 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108418407A (en) * | 2018-05-08 | 2018-08-17 | 杰华特微电子（杭州）有限公司 | A kind of power-supplying circuit and method and Switching Power Supply |
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| CN110764563B (en) * | 2019-10-29 | 2024-04-19 | 杰华特微电子股份有限公司 | Voltage regulating circuit and method |
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|---|---|
| CN107404225B (en) | 2023-06-23 |
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