CN107742978A - Charge pump circuit with enhancing driving force - Google Patents
Charge pump circuit with enhancing driving force Download PDFInfo
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- CN107742978A CN107742978A CN201711079617.7A CN201711079617A CN107742978A CN 107742978 A CN107742978 A CN 107742978A CN 201711079617 A CN201711079617 A CN 201711079617A CN 107742978 A CN107742978 A CN 107742978A
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- charge pump
- pump unit
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- order
- multiplying power
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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
- H02M3/06—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider
- H02M3/07—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode, e.g. charge pumps
Abstract
This application provides a kind of charge pump to include charge pump primary module, and the charge pump primary module includes X first order charge pump unit, and wherein X is the positive integer more than 1；Clock module, to export clock sequence to adjust the coupled relation between the first order charge pump unit and the coupled relation inside the first order charge pump unit；Multiplying power selecting module, it is to control the clock module to export corresponding clock sequence according to the output multiplying power of needs；The X first order charge pump unit is reassembled as Y second level charge pump unit by the charge pump primary module according to received clock sequence, Y is the positive integer more than or equal to 1 but less than or equal to X, wherein for a multiplying power of each integer or integer point, the number difference that Y second level charge pump unit has the first order charge pump unit included in identical equivalent capacitance value, or each second level charge pump unit is less than or equal to 1.Present invention also provides the method using charge pump adjustment voltage.
Description
Technical field
The application is related to integrated circuit fields, the full multiplying power charge pump more particularly to height output driving force.
Background technology
Charge pump construction is widely used in the power-supply management system design of display screen or handheld device.Charge pump is also referred to as
Switched capacitor voltage changer, be it is a kind of using electric capacity rather than inductance or transformer come the DC converter of energy storage.Pass through electricity
Lotus pump can be raised and lowered input voltage, it might even be possible to for producing negative voltage.Charge pump construction uses switch arrays with one
Fixed mode controls capacitor to be charged and discharged, and input voltage is doubled with certain factor or demultiplication, so as to required for obtaining
Output voltage.Because (capacitor type) charge pump does not include inductor, therefore the electromagnetic interference brought by inductor can be avoided.
No matter for which kind of application, the multiplying power that user is intended to charge pump output voltage can be in wider model
Interior change is enclosed, can so effectively improve power efficiency and ripple performance.When charge pump input voltage is smaller, height can be selected
Multiplying power mode of operation, it is on the contrary then low range mode of operation can be used.Especially, for the power module on piece, due to
Its integrated level is high, so quite being liked by user.Power module on piece is main typically using Dickson charge pump design on piece
Take a fancy to the characteristics of its chip area is small, and the loss that parasitic capacitance is brought is also small.
By taking traditional N level voltage-dropping type Dickson charge pumps as an example, input voltage VDD, its output voltage is VDD/(N+
1) it is 1/ (N+1), that is, to produce voltage multiplying power.As shown in figure 1, when charge pump switches to another multiplying power from a multiplying power, than
Such as：When charge pump is from 1/5 magnification transformable into 1/3 multiplying power, traditional method is that three-level is in parallel before allowing, and turns into new one-level, this
Sample, Dickson charge pump just become 2 level structures from 4 original level structures, and multiplying power also becomes 1/3.Although this scheme is effectively
All on-chip capacitances are make use of, load capacity can be improved, but it is also to be improved for charge pump output driving ability.This
It is the capacitance profile inequality because of each charge pump unit after combination, therefore charge pump circuit can not realize that the output of maximum is driven
Kinetic force.
Therefore the charge pump provided is needed to be that by a multiplying power of all integers or integer point to improve system work(
Rate, while more preferable output driving ability can also be provided.
The content of the invention
It is described this application provides a kind of charge pump, including charge pump primary module for problem present in current techniques
Charge pump primary module includes X first order charge pump unit, and wherein X is the positive integer more than 1；Clock module, it is configured as defeated
Go out clock sequence to adjust in coupled relation and the first order charge pump unit between the first order charge pump unit
The coupled relation in portion；Multiplying power selecting module, it is configured as output multiplying power as needed and controls the clock module output corresponding
Clock sequence；Wherein, the charge pump primary module according to received clock sequence by the X first order charge pump list
Member is reassembled as Y second level charge pump unit, and Y is the positive integer more than or equal to 1 but less than or equal to X, wherein for each integer
Or a multiplying power of integer point, Y second level charge pump unit have identical equivalent capacitance value, or each described second
The number difference of first order charge pump unit included in level charge pump unit is less than or equal to 1.
Particularly, in the case that in the Y second level, charge pump unit has identical equivalent capacitance value, with the electricity
The capacitance of first first order charge pump unit of lotus pump input coupling and the X coupled with the charge pump outputs
The capacitance of first order charge pump unit is standard value, and the capacitance of other first order charge pump units is less than the standard
Value.
Particularly, the charge pump also includes output capacitance, is coupling between output end and the ground level of the charge pump.
Particularly, when the maximum or minimum achievable multiplying power of the charge pump is n+1 or 1/ (n+1), the X first order
The total capacitance value sum of charge pump unit is equivalent to n specific capacitance sum, i+1 be the multiplying power that is actually needed and i be less than etc.
In n positive integer, j is the positive integer less than or equal to i, for j-th of second level charge pump unit, aij=n*j/i's is whole
Number part plus 1 represent specific capacitance sequence number where j-th of second level charge pump unit, its fractional part is represented at j-th the
The split position in specific capacitance where two-stage charge pump unit.
Particularly, each first order charge pump unit includes an electric capacity, and its first end is coupled to by first switch
The output end of previous first order charge pump unit, and the first end of the electric capacity is coupled to next by second switch
The output end of the charge pump is coupled at the input of one-step charge pump unit, the second end of the electric capacity by the 3rd switch,
Second end of the electric capacity ground level is coupled to by the 4th switch；Wherein described clock sequence includes two opposite clock letters
Number, it is configured to control one or more of described first to fourth switch.
Present invention also provides a kind of display, including foregoing any described charge pump.
Present invention also provides a kind of flash memory device, including foregoing any described charge pump.
Present invention also provides a kind of power supply, including foregoing any described charge pump.
Present invention also provides a kind of method that voltage is adjusted using charge pump, wherein the charge pump includes charge pump master
Module, clock module and multiplying power selecting module, methods described include multiplying power selecting module output multiplying power control needed for
The corresponding clock sequence of generation of clock module；The clock module is under the control of the multiplying power selecting module, described in output
Corresponding clock sequence；The charge pump primary module is according to received clock sequence by the X in the charge pump primary module
Individual first order charge pump unit is reassembled as Y second level charge pump unit, and Y is the positive integer more than or equal to 1 but less than or equal to X,
Wherein there is identical equivalent capacitance value for a multiplying power of each integer or integer point, Y second level charge pump unit,
Or the number difference of the first order charge pump unit included in each second level charge pump unit is less than or equal to 1.
Present invention also provides a kind of method that voltage adjustment is carried out using charge pump, wherein the charge pump includes electric charge
Pump primary module, clock module and multiplying power selecting module, the charge pump primary module include X first order charge pump unit, each
The first order charge pump unit has identical capacitance, and methods described is included the X first order charge pump unit point
Into two groups, one group includes m second level charge pump unit, and another group includes n second level charge pump unit；Wherein described m
Each in the charge pump unit of the second level includes k first order charge pump unit, in the charge pump unit of the n second level
Each includes k-1 first order charge pump unit；If X=1, stop all operations, otherwise make X=X-1, by n second
One in level charge pump is split as k-1 first order charge pump unit；As (n-1) >=(k-1), by the k-1 first
In the individual second level charge pump units being made up of k-1 first order charge pump unit of level charge pump unit insertion n-1, so as to be formed
Two groups of new second level charge pump units, one group includes m+k-1 second level charge pump unit, each second level electric charge in the group
Pump unit includes k first order charge pump unit；Another group includes n-k second level charge pump unit, each second level of the group
Charge pump unit includes k-1 first order charge pump unit；As (n-1)<And (k-n) (k-1)<During m, by the k-1 first
Second level charge pump units and k-n that level charge pump unit insertion n-1 is made up of k-1 first order charge pump unit it is individual by
In the second level charge pump unit of k first order charge pump unit composition, so as to form two groups of new second level charge pump units,
One group includes the individual second level charge pump units of (n-1)+(m- (k-n)), and each second level charge pump unit includes k the in the group
One-step charge pump unit；Another group includes k-n second level charge pump unit, and each second level charge pump unit of the group includes k+
1 first order charge pump unit.
The method that charge pump and the charge pump as provided herein carries out voltage adjustment, for all
One multiplying power of integer or integer point both provides the identical or essentially identical charge pump unit of equivalent capacitance value, for specific
For multiplying power, the output driving ability of charge pump improves 33% or higher.
Detailed description hereinafter with reference to accompanying drawing to the exemplary embodiment of the application.
Brief description of the drawings
Refer to the attached drawing shows and illustrates embodiment.These accompanying drawings be used for illustrate general principle, so as to illustrate only for
Understand the necessary aspect of general principle.These accompanying drawings are not in proportion.In the accompanying drawings, identical reference represents similar
Feature.
Fig. 1 show the charge pump construction module diagram according to the application one embodiment；
Fig. 2 show the charge pump primary module structural representation according to the application one embodiment；
Fig. 3 a- Fig. 3 d show the working state schematic representation of the charge pump primary module shown in Fig. 2；
Fig. 4 show the clock signal schematic diagram for the embodiment of the present application；
Fig. 5 show the method flow diagram that full multiplying power charge pump is constructed according to the application one embodiment；
Fig. 6 show the state diagram that full multiplying power charge pump is constructed according to the application one embodiment；
Fig. 7 show the structural representation according to the charge pump circuit that the minimum multiplying power of the application one embodiment is 1/7；
Fig. 8 a- Fig. 8 d show the working state schematic representation of the charge pump primary module according to another embodiment of the application；
Fig. 9 is shown to be reconfigured according to the charge pump unit in different multiplying charge pump that is directed to of the application one embodiment
Scheme list；And
Figure 10 show the method that voltage adjustment is carried out using charge pump according to the application one embodiment.
Embodiment
Each exemplary embodiment of the application is described in detail hereinafter with reference to accompanying drawing.It should be noted that unless have in addition
Body illustrates that the unlimited system of part and the positioned opposite of step, numerical expression and the numerical value otherwise illustrated in these embodiments is originally
The scope of application.
The description only actually at least one exemplary embodiment is illustrative below, not as to this Shen
Please and its application or any restrictions that use.
It may be not discussed in detail for technology, method and apparatus known to person of ordinary skill in the relevant, but suitable
In the case of, the technology, method and apparatus should be considered as part for specification.
In shown here and discussion all examples, any occurrence should be construed as merely exemplary, without
It is as limitation.Therefore, other examples of exemplary embodiment can have different values.
It should be noted that similar label and letter represent similar terms in following accompanying drawing, therefore, once a certain item exists
It is defined, then it need not be further discussed in subsequent accompanying drawing in one accompanying drawing.
For N level Dickson charge pumps, i is is less than or equal to N positive integer, C more than or equal to 1iFor i-stage charge pump
The capacitance of unit, f are charge pump frequency, ILFor charge pump output current, the internal resistance R of charge pumpssl, then output voltage
VOUTIt can be expressed as：
The wherein internal resistance R of charge pumpsslWith output current ILIt can be expressed as respectively
The total capacitance value of charge pump can be expressed by below equation,
According to average inequality, in the case where output voltage and frequency are certain, all charge pump units that and if only if
During electric capacity equalization, i.e. C1=C2=...=CN, output current ILIt is maximum：
Existing way is that the capacitance of N number of charge pump unit is set into identical, when charge pump is switched to by N times or 1/N times
During another multiplying power, existing method to set up is that the electric capacity of other charge pump units is simply distributed to such as first electricity
Lotus pump unit, the capacitance of first charge pump unit after merging can be more much larger than other charge pump units, and charge pump
Therefore driving force can just be affected, and to easily lead to first charge pump unit discharge and recharge incomplete for such setting
(because RC is excessive), it is likely that limit the overall work frequency of charge pump and cause relatively low driving force.
In order to overcome above mentioned problem, charge pump disclosed in the present application and the method using charge pump adjustment voltage are being realized entirely
Multiplying power, while make full use of on-chip capacitance, additionally provide more preferable output driving ability.
Fig. 1 show the module diagram of charge pump.Wherein, charge pump 100 can include multiplying power selecting module 102 by with
Reception input signal is put, produces multiplying power of the output signal relative to input signal, control signal is produced always according to the multiplying power, with control
Clock module processed selects corresponding clock sequence.Clock module 104 is configured as selecting under the control of multiplying power selecting module 102
Corresponding clock sequence, so as to control the folding condition of each switch in charge pump primary module 106.Charge pump 100 also includes electricity
For lotus pump primary module 106 including multiple charge pump units, charge pump unit includes electric capacity and switch arrays, each electric charge
Include switch inside pump unit, switch is also included between each charge pump unit.Folding conditions of these switches are by from described
The clock sequence that clock module 104 receives is controlled.
Fig. 2 is the voltage-dropping type charge pump section structural representation according to the application one embodiment.Fig. 2 shows charge pump
Primary module and output capacitance CL.According to one embodiment, the maximum output multiplying power of the charge pump is 5 times or 1/5 times.In this reality
Apply in example, charge pump primary module includes six charge pump units, and each charge pump list on the direction from input to output end
The capacitance that member includes is C, 1/3C, 2/3C, 2/3C, and C, wherein C representative units capacitance respectively.In each charge pump unit
The bottom crown of electric capacity is all coupled to output voltage V by switch respectivelyOUTAnd ground level；Electric capacity is upper in adjacent charge pump unit
Pole plate is coupled to each other by switching.The top crown of the electric capacity of first (namely near input) charge pump unit is also logical
Cross switch and be coupled to the input of charge pump for receiving input signal such as VDD.6th (namely near output end)
The top crown of charge pump unit is additionally coupled to output capacitance CLTop crown and charge pump outputs.Output capacitance CLLower pole
Plate is coupled to ground level.
It is worth noting that, although the application is probably voltage-dropping type charge pump as the example of exemplary illustration.But this
Art personnel know, can be realized without creative efforts based on technical scheme disclosed in the present application
Corresponding booster type charge pump.
Fig. 3 a- Fig. 3 d show working condition of the charge pump section arrangement works shown in Fig. 2 under different output multiplying powers
Schematic diagram.Fig. 4 is the clock sequence schematic diagram for the charge pump shown in Fig. 2.
Fig. 3 a show the state for the mode of operation that the charge pump section arrangement works shown in Fig. 2 are 1/5 in output multiplying power
Schematic diagram.Two clock signal Φ shown in Fig. 4 can be used1And Φ2To between charge pump unit inside and charge pump unit
On off state be controlled.
According to one embodiment, the charge pump primary module in the present embodiment includes 6 charge pump units and an output electricity
Hold CL.Clock signal Φ1Control the switch S between input and the first charge pump unit1, tricharged pump unit and the 4th
Switch S between charge pump unit4And the 6th switch S between charge pump unit and output end7State；Φ1It also control
First and the 4th and the 5th charge pump unit and output voltage VOUTBetween switch S8、S14And S16State, and second,
Switch S between 3rd and the 6th charge pump unit and ground level11、S13And S19State.
According to one embodiment, Φ2Control the switch S between the first charge pump unit and the second charge pump2State,
And the 5th switch S between charge pump unit and the 6th charge pump unit6State；Φ2It also control the first, the 4th and
Switch S between five charge pump units and ground level9、S15And S17State, and second, third and the 6th charge pump unit with
Output voltage VOUTBetween switch S10、S12And S18State.
According to one embodiment, the switch S between second and tricharged pump unit3, and the 4th and the 5th charge pump
Switch S between unit5All be set as permanent conducting state, or perhaps under the control of significant level (such as high level) this two
Individual switch turns on all the time.
According to one embodiment, as shown in figure 4, Φ1And Φ2Two clocks not overlapped for significant level such as high level
Signal.
According to the embodiment of one, work as Φ1=1 Φ2When=0, S is switched1And S8Conducting, switch S2And S9Disconnect, the
The electric capacity C of one charge pump unit1It is transfused to voltage VDDIt is charged to VDD-VOUT。
Work as Φ1=0 Φ2When=1, S is switched2Conducting, the electric capacity C of the first charge pump unit1Electric discharge.Switch S10And S12
Conducting, switch S11And S13Disconnect, due to switching S3Perseverance conducting, the electric capacity C of second, third charge pump unit2And C3Parallel connection, it is equivalent
Capacitance is C, and is charged to VDD-2VOUT。
As Φ again1=1 Φ2When=0, S is switched4Turn on, the electric capacity C in second, third charge pump unit2And C3
Discharge together.Switch S14And S16Conducting, switch S15And S17Disconnect, due to switching S5Perseverance conducting, the four, the 5th charge pump units
Electric capacity C4And C5Parallel connection, equivalent capacitance value C, and it is charged to VDD-3VOUT。
As Φ again1=0 Φ2When=1, S is switched6Turn on, the electric capacity C in the 4th and the 5th charge pump unit4With
C5Discharge together, switch S18Conducting, switch S19Disconnect, the electric capacity C of the 6th charge pump unit6It is charged to VDD-4VOUT。
As Φ again1=1 Φ2When=0, S is switched7Conducting, the electric capacity C of the 6th charge pump unit6To output capacitance
CLElectric discharge, and provide output signal V to output endDD-4VOUT=VOUT.Thus, it can be known that VOUT=1/5VDD。
In this embodiment, by six first order electric capacity C1To C6The second level electric capacity C1 reconfigured, C2+C3,
C4+C5, C6Equivalent capacitance value be all C.According to foregoing theory, under 1/5 multiplying power, the capacitance of charge pump each unit is equal,
It is achieved that maximum output driving force.
Fig. 3 b show the state for the mode of operation that the charge pump section arrangement works shown in Fig. 2 are 1/4 in output multiplying power
Schematic diagram.Two clock signal Φ shown in Fig. 4 can equally be used1And Φ2To charge pump unit inside and charge pump unit
Between on off state be controlled.
According to one embodiment, Φ1Control the switch S between charge pump unit1And S5State；Φ1It also control electricity
Lotus pump unit internal switch S8、S10、S13、S15、S16And S18State.Φ2Control the switch S between charge pump unit3And S7
State；Φ2It also control charge pump unit internal switch S9、S11、S12、S14、S17And S19State.
According to one embodiment, the switch S between first and second charge pump unit2, the third and fourth charge pump unit
Between switch S4, and the switch S between the 5th and the 6th charge pump unit6All it is set as permanent conducting state, or perhaps
The two switches turn on all the time under the control of significant level (such as high level).
According to one embodiment, as shown in figure 4, Φ1And Φ2Two clocks not overlapped for significant level such as high level
Signal.
According to the embodiment of one, work as Φ1=1 Φ2When=0, S is switched1、S8And S10Conducting, switch S3、S9And S11
Disconnect.Due to switching S2Perseverance conducting, the electric capacity C of first, second charge pump unit1And C2Parallel connection, equivalent capacitance value are (1+1/3)
C, it is charged to VDD-VOUT。
Work as Φ1=0 Φ2When=1, S is switched3Conducting, the electric capacity C of the first and second charge pump units1And C2Electric discharge.Open
Close S12And S14Conducting, switch S13And S15Disconnect, due to switching S4Perseverance conducting, the electric capacity C of the three, the 4th charge pump units3And C4
Parallel connection, equivalent capacitance value is (1+1/3) C, and is charged to VDD-2VOUT。
As Φ again1=1 Φ2When=0, S is switched5Turn on, the electric capacity C in the three, the 4th charge pump units3And C4
Discharge together.Switch S16And S18Conducting, switch S17And S19Disconnect, due to switching S5Perseverance conducting, the five, the 6th charge pump units
Electric capacity C5And C6Parallel connection, equivalent capacitance value is (1+1/3) C, and is charged to VDD-3VOUT。
As Φ again1=0 Φ2When=1, S is switched7Conducting, the electric capacity C of the 5th and the 6th charge pump unit5And C6
To output capacitance CLElectric discharge, and provide output signal V to output endDD-3VOUT=VOUT.Thus, it can be known that VOUT=1/4VDD。
In this embodiment, by C1+C2, C3+C4, C5+C6These three are by first order electric capacity C1-C6Reconfigure
The equivalent capacitance value of second level electric capacity is all (1+1/3) C.According to foregoing theory, such arrangement can realize charge pump most
Big output current.
Similar, the charge pump section separation structure that Fig. 3 c and Fig. 3 d are shown in Fig. 2 is in the case of 1/3 and 1/2 multiplying power is realized
Working state figure.In figure 3 c, by C1+C2+C3And C4+C5+C6It is reassembled into two second level electric capacity, each second level electricity
The equivalent capacitance value of appearance is 2C.In Fig. 3 d, by C1+C2+C3+C4+C5+C6A second level electric capacity is reassembled into, its is equivalent
Capacitance is 4C.
Voltage-dropping type charge pump is employed in the application to be illustrated.Those of ordinary skill in the art can be based on the application
Disclosed information realization booster type charge pump.
As can be seen here, using the charge pump in the embodiment of the present application, while all integer multiplying powers are realized, ensure that with
The equivalent capacitance value of the corresponding each two-stage charge pump unit of particular power is identical, so that charge pump can reach under each multiplying power
To the output driving ability of maximum.
The method that Fig. 5 show the full multiplying power charge pump of a kind of construction according to the embodiment of the application one.In the present embodiment
Charge pump can realize 1/ (n+1) of maximum output multiplying power, wherein n is the positive integer more than or equal to 1.
In step 502, n charge pump unit is set, wherein the capacitance that each charge pump unit includes is identical.
In step 504, the electric capacity in the charge pump unit in addition to the 1st and n-th of charge pump unit is split, wherein
Cut-point is aij=n*j/i, wherein i are that (its corresponding multiplying power can be such as 1/ (i+ for the charge pump series of practically necessary realization
1)), i is the positive integer for being less than or equal to n more than or equal to 1, and j is the positive integer less than or equal to i, a more than or equal to 1ijInteger part
It is related to the electric capacity sequence number to be split, such as aijInteger part add 1 to be electric capacity sequence number to be split.aijFractional part with
Position of the cut-point in electric capacity to be split is related, such as represents the location point in the electric capacity to be split.
Fig. 6 is the schematic diagram that method shown in Fig. 5 carries out capacitive division for different multiplying powers.When the multiplying power to be exported is most
When big or minimum output multiplying power n+1 or 1/ (n+1), an,j=n*j/n, j are just whole less than or equal to n more than or equal to 1
Number, charge pump has n charge pump unit just, therefore the electric capacity in each charge pump unit need not be split.When required
Output multiplying power when be n or 1/n, an-1,j=n*j/ (n-1), j are the positive integer for being less than or equal to n-1 more than or equal to 1, can
Adjust the segmentation to standard charge pump unit step by step with the multiplying power needed for according to this rule.
Fig. 7 is the schematic diagram that the method shown in Fig. 5 is split in the case of n=6 to electric capacity.When i=6,
Electric capacity in 6 charge pump units need not be split.
When i=5, a5,jRespectively 6/5,12/5,18/5,24/5 and 6, it is meant that in the electricity of the 2nd charge pump unit
Hold 1/5 at, at the 2/5 of the electric capacity of the 3rd charge pump unit, at the 3/5 of the electric capacity of the 4th charge pump unit, in the 5th electric charge
Split at the 4/5 of the electric capacity of pump unit.
When i=4, a4,jRespectively 3/2,3,9/2, and 6, it is meant that the 1/2 of the electric capacity of the 2nd charge pump unit
Split at the 1/2 of the electric capacity of place and the 5th charge pump unit.
When i=3, a3,jRespectively 2,4, and 6, it is not necessary to the electric capacity of charge pump unit is split.
When i=2, a2,jRespectively 3 and 6, it is not necessary to which the electric capacity of charge pump unit is split.
In summary, in order to realize 1 to 7 or 1 to 1/7 multiplying power, the 2nd charge pump unit using the charge pump shown in Fig. 6
Electric capacity need be divided 2 times, cut-point for the electric capacity 1/5 and 1/2 at；The electric capacity of 3rd charge pump unit needs to be divided 1
Secondary, cut-point is at the 2/5 of the electric capacity；The electric capacity of 4th charge pump unit needs to be divided 1 time, and cut-point is the 3/5 of the electric capacity
Place；The electric capacity of 5th charge pump unit needs to be divided 2 times, and cut-point is at the 1/2 and 4/5 of the electric capacity；1st and the 6th charge pump
The electric capacity of unit need not be divided.
So in order to realize above-mentioned all multiplying powers, in the design of charge pump primary module, need setting 12 small altogether
Electric capacity, capacitance ratio are followed successively by：1,1/5,3/10,1/2,2/5,3/5,3/5,2/5,1/2,3/10,1/5,1.These electric capacity
First order electric capacity can be referred to as, the charge pump unit comprising this 12 small capacitances can be referred to as first order charge pump unit.
According to above-described embodiment, for the different multiplying of required realization, shape can be combined to these first order charge pump units
Into equivalent capacitance value identical second level charge pump unit, so as to ensure that charge pump all there is maximum output to drive under each multiplying power
Kinetic force.
Fig. 8 a- Fig. 8 d show work shape of another embodiment of the charge pump shown in Fig. 1 under different output multiplying powers
State schematic diagram.In the present embodiment, each charge pump unit in charge pump primary module has identical electric capacity.With traditional electricity
Unlike lotus pump, when conversion exports multiplying power, in order to realize output driving ability as big as possible, multiplying power selecting module
Can be as far as possible average by calculating the capacitance of the second level charge pump unit after reconfiguring.
The charge pump section arrangement works that Fig. 8 a show the present embodiment are illustrated in the working condition that output multiplying power is 1/5
Figure.Two clock signal Φ shown in Fig. 4 can be used1And Φ2To opening between charge pump unit inside and charge pump unit
Off status is controlled.According to one embodiment, the charge pump primary module in the present embodiment includes 4 charge pump units and one defeated
Go out electric capacity CL.Because four original capacitances of charge pump unit of charge pump primary module are exactly equal, therefore realizing 1/5 times
Charge pump unit need not be carried out reconfiguring can in the case of rate and realize maximum output driving force.
The state for the mode of operation that the charge pump section arrangement works that Fig. 8 b show the present embodiment are 1/4 in output multiplying power
Schematic diagram.
According to one embodiment, clock signal Φ1Control the switch S between input and the first charge pump unit1,
Switch S between tricharged pump unit and the 4th charge pump unit4State；Φ1It also control first, second and the 4th electric charge
Pump unit and output voltage VOUTBetween switch S6、S8And S12State, and between tricharged pump unit and ground level
Switch S11State.
According to one embodiment, Φ2Control the switch S between the second charge pump unit and tricharged pump3State,
And the 4th switch S between charge pump unit and output end5State；Φ2It also control first, second and the 4th charge pump
Switch S between unit and ground level7、S9And S13State, and tricharged pump unit and output voltage VOUTBetween open
Close S10State.
According to one embodiment, the switch S between first and second charge pump unit2Permanent conducting state is set as, or
Say it is that this switch turns on all the time under the control of significant level (such as high level).
According to one embodiment, as shown in figure 4, Φ1And Φ2Two clocks not overlapped for significant level such as high level
Signal.
According to the embodiment of one, work as Φ1=1 Φ2When=0, S is switched1Conducting, switch S7And S9Disconnect, due to opening
Close S2Perseverance conducting, the electric capacity C of the first and second charge pump units1And C2Parallel connection, and it is transfused to voltage VDDIt is charged to VDD-VOUT。
Work as Φ1=0 Φ2When=1, S is switched3Conducting, the electric capacity C of the first and second charge pump units1And C2Electric discharge.Open
Close S3And S10Conducting, switch S11Disconnect, the electric capacity C of tricharged pump unit3It is charged to VDD-2VOUT。
As Φ again1=1 Φ2When=0, S is switched4Conducting, C3Electric discharge.Switch S12Conducting, switch S13Disconnect, C4
It is charged to VDD-3VOUT。
As Φ again1=0 Φ2When=1, S is switched5Conducting, the electric capacity C of the 4th charge pump unit4To output capacitance
CLElectric discharge, and provide output signal V to output endDD-3VOUT=VOUT.Thus, it can be known that VOUT=1/4VDD。
In this embodiment, by including C1And C2First and second charge pump units are recombined the electricity for the second level
Lotus pump unit, but including C3And C4First order charge pump unit it is not combined.
The state for the mode of operation that the charge pump section arrangement works that Fig. 8 c show the present embodiment are 1/3 in output multiplying power
Schematic diagram.
According to one embodiment, clock signal Φ1Control the switch S between input and the first charge pump unit1,
Switch S between four charge pump units and output end5State；Φ1It also control first, second charge pump unit and output electricity
Press VOUTBetween switch S6And S8State, and the switch S between the third and fourth charge pump unit and ground level11And S13
State.
According to one embodiment, Φ2Control the switch S between the second charge pump unit and tricharged pump3State；
Φ2It also control the switch S between the first and second charge pump units and ground level7And S9State, and third and fourth electricity
Lotus pump unit and output voltage VOUTBetween switch S10And S12State.
According to one embodiment, the switch S between first and second charge pump unit2With the 3rd and the 4th charge pump unit
Between switch S4Permanent conducting state is set as, or perhaps this switch begins under the control of significant level (such as high level)
Conducting eventually.
According to one embodiment, as shown in figure 4, Φ1And Φ2Two clocks not overlapped for significant level such as high level
Signal.
According to the embodiment of one, work as Φ1=1 Φ2When=0, S is switched1、S6And S8Conducting, switch S7And S9Disconnect,
Due to switching S2Perseverance conducting, the electric capacity C of the first and second charge pump units1And C2Parallel connection, and it is transfused to voltage VDDIt is charged to
VDD-VOUT。
Work as Φ1=0 Φ2When=1, S is switched3Conducting, the electric capacity C of the first and second charge pump units1And C2Electric discharge.Open
Close S10And S12Conducting, switch S11And S13Disconnect, due to switching S4Perseverance conducting, the electric capacity C of tricharged pump unit3And C4Parallel connection,
And it is charged to VDD-2VOUT。
As Φ again1=1 Φ2When=0, S is switched5Conducting, C3And C4To output capacitance CLElectric discharge, and to output end
Output signal V is providedDD-2VOUT=VOUT.Thus, it can be known that VOUT=1/3VDD。
In this embodiment, by including C1And C2First order charge pump unit and including C3And C4The first order electricity
Lotus pump unit is reconfigured as the charge pump unit of two groups of second level respectively.After such reconfigure, two second
The equivalent capacitance value of level charge pump unit is equal, it is achieved thereby that output driving ability maximum under 1/3 output multiplying power.
The state for the mode of operation that the charge pump section arrangement works that Fig. 8 d show the present embodiment are 1/2 in output multiplying power
Schematic diagram.Four charge pump units are directly combined as second level charge pump unit in this case, therefore realized
The problem of being averaged as far as possible without the concern for second level charge pump unit equivalent capacity in the case of 1/2.
In summary, from the point of view of the example shown in Fig. 8 a- Fig. 8 d, for each electricity in the case of 1/5 multiplying power and 1/3 multiplying power
Lotus pump unit capacitance is equal, especially for 1/3 multiplying power situation relative to traditional way (namely for example by
First, second, third charge pump unit is combined into the situation of a second level charge pump unit) output driving ability improves
33.3%.
According to a kind of method of the full multiplying power charge pump of construction of the embodiment of the application one.Charge pump in the embodiment can be with
It is equal including the individual first order charge pump units of m*k+n* (k-1), the capacitance of each first order charge pump unit.For each
One multiplying power of integer pointFor, above-mentioned first order charge pump unit can be divided into two groups of second level charge pump lists
Member, one group includes m second level charge pump unit, and each charge pump unit includes k first order charge pump unit；Another group of bag
N second level charge pump unit is included, each charge pump unit includes k-1 first order charge pump unit；Wherein x=m+n, wherein
M, n, k are the positive integer more than or equal to 1.Combinations thereof relation can be expressed with formula (6).
When further realizingMultiplying power is namelyWhen multiplying power, it is possible to reduce a second level charge pump unit, example
One in the second level charge pump unit that n such as rightmost is made up of k-1 first order charge pump unit, by the second level
K-1 first order charge pump unit in charge pump unit equably " inserts " other n-1 by k-1 first order charge pump
The second level charge pump unit of unit composition and the m second level charge pump units being made up of k charge pump unit.
In the presence of two kinds of situations：, can be by one of rightmost by k-1 first order charge pump list as (n-1) >=(k-1)
The second level charge pump unit of member composition uniformly inserts the n-1 second level electric charges being made up of k-1 first order charge pump unit
In pump unit, so as to form the k-1 new second level charge pump units being made up of k first order charge pump unit, and n-k
The individual second level charge pump unit being made up of k-1 first order charge pump unit, so as to realizeMultiplying power.Formula 7 embodiesThe combination formed under multiplying power in order to reach close maximum output driving ability.
As (n-1)<And (k-n) (k-1)<During m, one of rightmost is made up of k-1 first order charge pump unit
Second level charge pump unit is uniformly inserted in the individual second level charge pump units being made up of k-1 first order charge pump unit of n-1,
So as to form the individual second level charge pump units being made up of k first order charge pump unit of (n-1)+(m- (k-n)), and k-n
The individual second level charge pump unit being made up of k+1 first order charge pump unit, so as to realizeMultiplying power.Formula 8 embodiesThe combination formed under multiplying power in order to reach close maximum output driving ability.
Form shown in Fig. 9 is the group of the charge pump unit carried out according to above-described embodiment for different output multiplying powers
Conjunction mode.Combination wherein in dotted line frame is the multiplying power that driving force is improved for traditional charge pump.
Figure 10 show the method that voltage adjustment is carried out using charge pump according to the application one embodiment, the wherein electricity
The primary module of lotus pump includes x first order charge pump unit, and each first order charge pump unit has identical capacitance, and x is
Positive integer more than or equal to 1.
In step 1002, x first order charge pump unit is divided into two groups, one group includes m second level charge pump unit,
Another group includes n second level charge pump unit；Each in wherein described m second level charge pump unit includes k the
One-step charge pump unit, each in the charge pump unit of the n second level include k-1 first order charge pump unit；
In step 1004, if x=1, stop calculating, otherwise enter step 1006；
In step 1006, x=x-1, one in n second level charge pump is split as k-1 first order charge pump list
Member；
In step 1008, detection n-1 and k-1 relation；
In step 1010, as (n-1) >=(k-1), the k-1 first order charge pump unit is inserted n-1 by k-1
In the second level charge pump unit of individual first order charge pump unit composition, so as to form two groups of new second level charge pump units,
One group includes m+k-1 second level charge pump unit, and each second level charge pump unit includes k first order charge pump in the group
Unit；Another group includes n-k second level charge pump unit, and each second level charge pump unit of the group includes the k-1 first order
Charge pump unit；
In step 1012, as (n-1)<And (k-n) (k-1)<During m, the k-1 first order charge pump unit is inserted into n-
1 second level charge pump unit being made up of k-1 first order charge pump unit and k-n are individual by k first order charge pump list
In the second level charge pump unit of member composition, so as to form two groups of new second level charge pump units, one group includes (n-1)+(m-
(k-n)) individual second level charge pump unit, each second level charge pump unit includes k first order charge pump unit in the group；Separately
One group includes k-n second level charge pump unit, and each second level charge pump unit of the group includes k+1 first order charge pump list
Member.
Although some specific embodiments of the application are described in detail by example, the skill of this area
Art personnel it should be understood that example above merely to illustrate, rather than in order to limit scope of the present application.The skill of this area
Art personnel in the case where not departing from the scope and spirit of the present application to above example it should be understood that can modify.This Shen
Scope please is defined by the following claims.
Claims (10)
1. a kind of charge pump, including
Charge pump primary module, the charge pump primary module include X first order charge pump unit, and wherein X is just whole more than 1
Number；
Clock module, be configured as exporting clock sequence with adjust coupled relation between the first order charge pump unit and
Coupled relation inside the first order charge pump unit；
Multiplying power selecting module, it is configured as output multiplying power as needed and controls the clock module to export corresponding clock sequence
Row；
Wherein, the charge pump primary module recombinates the X first order charge pump unit according to received clock sequence
For Y second level charge pump unit, Y is the positive integer more than or equal to 1 but less than or equal to X, wherein for each integer or integer
/ mono- multiplying power, Y second level charge pump unit have identical equivalent capacitance value, or each second level electric charge
The number difference of first order charge pump unit included in pump unit is less than or equal to 1.
2. charge pump as claimed in claim 1, wherein there is identical equivalent capacity in Y second level charge pump unit
In the case of value, the capacitance of first first order charge pump unit coupled with the charge pump input and with the electric charge
The capacitance of the X first order charge pump unit of pump output terminal coupling is standard value, other described first order charge pump units
Capacitance be less than the standard value.
3. charge pump as claimed in claim 1 also includes, output capacitance, the output end and ground level of the charge pump are coupling in
Between.
4. charge pump as claimed in claim 2, wherein when the maximum or minimum achievable multiplying power of the charge pump is n+1 or 1/
(n+1), the total capacitance value sum of the X first order charge pump unit is equivalent to n specific capacitance sum, and i+1 needs to be actual
The multiplying power and i wanted are the positive integer less than or equal to n, and j is the positive integer less than or equal to i, for j-th of second level charge pump unit
For, aij=n*j/i integer part adds 1 to represent specific capacitance sequence number where j-th of second level charge pump unit, its fraction
Part represents the split position in the specific capacitance where j-th of second level charge pump unit.
5. charge pump as claimed in claim 1, wherein each first order charge pump unit includes an electric capacity, its first end
It is coupled to the output end of previous first order charge pump unit by first switch, and the first end of the electric capacity passes through second
Switch is coupled to the input of next first order charge pump unit, and institute is coupled in the second end of the electric capacity by the 3rd switch
The output end of charge pump is stated, ground level is coupled in the second end of the electric capacity by the 4th switch；
Wherein described clock sequence includes two opposite clock signals, is configured to control first to fourth switch
One or more of.
6. a kind of display, including the charge pump as described in any in claim 1-5.
7. a kind of flash memory device, including the charge pump as described in any in claim 1-5.
8. a kind of power supply, including the charge pump as described in any in claim 1-5.
9. a kind of method that voltage is adjusted using charge pump, wherein the charge pump includes charge pump primary module, clock module with
Multiplying power selecting module, methods described include
The corresponding clock sequence of generation of multiplying power selecting module output multiplying power control clock module needed for；
The clock module exports corresponding clock sequence under the control of the multiplying power selecting module；
The charge pump primary module is according to received clock sequence by X first order electric charge in the charge pump primary module
Pump unit is reassembled as Y second level charge pump unit, and Y is the positive integer more than or equal to 1 but less than or equal to X, wherein for each
One multiplying power of integer or integer point, Y second level charge pump unit have identical equivalent capacitance value, or each described
The number difference of first order charge pump unit included in the charge pump unit of the second level is less than or equal to 1.
A kind of 10. method that voltage adjustment is carried out using charge pump, wherein the charge pump includes charge pump primary module, clock mould
Block and multiplying power selecting module, the charge pump primary module include X first order charge pump unit, each first order charge pump
Unit has identical capacitance, and methods described includes
The X first order charge pump unit is divided into two groups, one group includes m second level charge pump unit, and another group includes n
Individual second level charge pump unit；Each in wherein described m second level charge pump unit includes k first order charge pump list
Member, each in the charge pump unit of the n second level include k-1 first order charge pump unit；
If X=1, stop all operations, otherwise make X=X-1, one in n second level charge pump is split as k-1 the
One-step charge pump unit；
As (n-1) >=(k-1), the k-1 first order charge pump unit is inserted n-1 by k-1 first order charge pump
In the second level charge pump unit of unit composition, so as to form two groups of new second level charge pump units, one group includes m+k-1
Second level charge pump unit, each second level charge pump unit includes k first order charge pump unit in the group；Another group includes
N-k second level charge pump unit, each second level charge pump unit of the group include k-1 first order charge pump unit；
As (n-1)<And (k-n) (k-1)<During m, the k-1 first order charge pump unit is inserted n-1 by k-1 first
The second level charge pump unit of level charge pump unit composition and the k-n second level being made up of k first order charge pump unit
In charge pump unit, so as to form two groups of new second level charge pump units, one group includes the individual second level of (n-1)+(m- (k-n))
Charge pump unit, each second level charge pump unit includes k first order charge pump unit in the group；Another group includes k-n
Second level charge pump unit, each second level charge pump unit of the group include k+1 first order charge pump unit.
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| CN201711079617.7A CN107742978B (en) | 2017-11-06 | 2017-11-06 | Charge pump circuit with enhancing driving capability |
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| CN201711079617.7A CN107742978B (en) | 2017-11-06 | 2017-11-06 | Charge pump circuit with enhancing driving capability |
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| CN111817553A (en) * | 2020-07-01 | 2020-10-23 | 浙江驰拓科技有限公司 | On-chip charge pump circuit |
| CN111969845A (en) * | 2020-09-04 | 2020-11-20 | 广东工业大学 | Mixed type reconfigurable charge pump circuit |
| CN115864830A (en) * | 2023-02-15 | 2023-03-28 | 深圳通锐微电子技术有限公司 | Negative-pressure two-removal switching circuit and equipment terminal |
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| Publication number | Publication date |
|---|---|
| CN107742978B (en) | 2019-12-03 |
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