CN107742978B - Charge pump circuit with enhancing driving capability - Google Patents
Charge pump circuit with enhancing driving capability Download PDFInfo
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- CN107742978B CN107742978B CN201711079617.7A CN201711079617A CN107742978B CN 107742978 B CN107742978 B CN 107742978B CN 201711079617 A CN201711079617 A CN 201711079617A CN 107742978 B CN107742978 B CN 107742978B
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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
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Abstract
It include charge pump main module this application provides a kind of charge pump, which includes X first order charge pump unit, and wherein X is the positive integer greater than 1；Clock module is output 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 exports corresponding clock sequence to control the clock module according to the output multiplying power of needs；The X first order charge pump unit is reassembled as Y second level charge pump unit to the charge pump main module by clock sequence based on the received, 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 of first order charge pump unit included in Y second level charge pump unit equivalent capacitance value having the same or each second level charge pump unit is less than or equal to 1.Present invention also provides the methods using charge pump adjustment voltage.
Description
Technical field
This application involves integrated circuit fields, in particular to the full multiplying power charge pump of high output driving ability.
Background technique
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 capacitor rather than inductance or transformer are come the DC converter of energy storage.Pass through electricity
Lotus pump can be such that input voltage is raised and lowered, it might even be possible to for generating negative voltage.Charge pump construction uses switch arrays with one
Fixed mode controls capacitor charging and discharging, and input voltage is made double with certain factor or demultiplication, to obtain required
Output voltage.It, can be to avoid by inductor bring electromagnetic interference since (capacitive) charge pump does not include inductor.
No matter for which kind of application, the multiplying power that user is intended to charge pump output voltage can be than wider model
Interior variation is enclosed, can effectively improve power efficiency and ripple performance in this way.When charge pump input voltage is smaller, height can be selected
Multiplying power operating mode, it is on the contrary then low range operating mode can be used.Particularly, for the power module of on piece, due to
Its integrated level is high, so quite being liked by user.The power module of on piece generally uses on piece Dickson charge pump to design, main
Take a fancy to that its chip area is small, parasitic capacitance bring loss also small feature.
By taking traditional N grade voltage-dropping type Dickson charge pump as an example, input voltage VDD, output voltage VDD/(N+
1), that is, generating voltage multiplying power is 1/ (N+1).As shown in Figure 1, when charge pump switches to another multiplying power from a multiplying power, than
Such as: when charge pump is transformed into 1/3 multiplying power from 1/5 multiplying power, traditional method is that three-level is in parallel before allowing, and becomes new level-one, 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 utilized, load capacity can be improved, but it is also to be improved for charge pump output driving ability.This
It is because the capacitance profile of each charge pump unit after combination is unequal, charge pump circuit cannot achieve maximum output and drive
Kinetic force.
Therefore charge pump to be offered is needed to be that by a multiplying power of all integer or integer point to improve system function
Rate, while better output driving ability can also be provided.
Summary of the invention
It is the problem of for current techniques, described this application provides a kind of charge pump, including charge pump main module
Charge pump main module includes X first order charge pump unit, and wherein X is the positive integer greater than 1；Clock module is configured as defeated
Clock sequence is out 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 is configured as the output multiplying power control clock module output phase as needed and answers
Clock sequence；Wherein, the charge pump main module based on the 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 being directed to each integer
Or a multiplying power of integer point, Y second level charge pump unit equivalent capacitance value having the same or each described second
The number difference of first order charge pump unit included in grade charge pump unit is less than or equal to 1.
Particularly, in the case where Y second level charge pump unit equivalent capacitance value having the same, with the electricity
The capacitance of first first order charge pump unit of lotus pump input terminal 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 further includes output capacitance, is coupled between the output end and ground level of the charge pump.
Particularly, when the maximum of the charge pump or minimum achievable multiplying power are n+1 or 1/ (n+1), the X first order
The sum of total capacitance value of charge pump unit is equivalent to the sum of n specific capacitance, i+1 be multiplying power actually required and i be less than etc.
In the positive integer of n, 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 serial number where j-th of second level charge pump unit, fractional part is represented at j-th the
The division position in specific capacitance where two-stage charge pump unit.
Particularly, each first order charge pump unit includes a capacitor, and first end is coupled to by first switch
The output end of previous first order charge pump unit, and the first end of the capacitor is coupled to next by second switch
The input terminal of one-step charge pump unit, the second end of the capacitor are coupled to the output end of the charge pump by third switch,
The second end of the capacitor is coupled to ground level by the 4th switch；Wherein the 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 displays, including aforementioned any charge pump.
Present invention also provides a kind of flash memory devices, including aforementioned any charge pump.
Present invention also provides a kind of power supplys, including aforementioned any charge pump.
Present invention also provides a kind of methods using charge pump adjustment voltage, wherein the charge pump includes charge pump master
Module, clock module and multiplying power selecting module, the method includes the multiplying power selecting modules to control according to required output multiplying power
The corresponding clock sequence of the 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 main module based on the received clock sequence by the X in the charge pump main module
A 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,
The multiplying power wherein divided for each integer or integer, Y second level charge pump unit equivalent capacitance value having the same,
Or the number difference of 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 methods for carrying out voltage adjustment using charge pump, wherein the charge pump includes charge
Main module is pumped, clock module and multiplying power selecting module, the charge pump main module include X first order charge pump unit, each
The first order charge pump unit capacitance having the same, the method includes dividing the X first order charge pump unit
At two groups, one group includes m second level charge pump unit, and another group includes n second level charge pump unit；Wherein the m
Each of second level charge pump unit 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 grade charge pump is split as k-1 first order charge pump unit；As (n-1) >=(k-1), by the k-1 first
In a second level charge pump unit being made of k-1 first order charge pump unit of grade charge pump unit insertion n-1, 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 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) < (k-1) and (k-n) < m, by the k-1 first
The second level charge pump unit and k-n that grade charge pump unit insertion n-1 is made of k-1 first order charge pump unit it is a by
In the second level charge pump unit of k first order charge pump unit composition, so that two groups of new second level charge pump units are formed,
One group includes a second level charge pump unit 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.
Charge pump provided herein and the method for carrying out voltage adjustment using such charge pump, 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.
Hereinafter reference will be made to the drawings to the detailed description of the exemplary embodiment of the application.
Detailed description of the invention
It is shown with reference to attached drawing and illustrates embodiment.These attached drawings for illustrating basic principle, thus illustrate only for
Understand the necessary aspect of basic principle.These attached drawings are not in proportion.In the accompanying drawings, identical appended drawing reference indicates similar
Feature.
Fig. 1 show the charge pump construction module diagram according to the application one embodiment；
Fig. 2 show the charge pump main module structural schematic diagram according to the application one embodiment；
Fig. 3 a- Fig. 3 d show the working state schematic representation of charge pump main 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 schematic diagram for the charge pump circuit for being 1/7 according to the minimum multiplying power of the application one embodiment；
Fig. 8 a- Fig. 8 d show the working state schematic representation of the charge pump main module according to another embodiment of the application；
Fig. 9 show reconfiguring for charge pump unit in different multiplying charge pump according to the application one embodiment
Scheme list；And
Figure 10 show the method for carrying out voltage adjustment using charge pump according to the application one embodiment.
Specific embodiment
Hereinafter reference will be made to the drawings each exemplary embodiment of the application is described in detail.It should be noted that unless in addition having
Body explanation, the unlimited system of component and the positioned opposite of step, numerical expression and the numerical value otherwise illustrated in these embodiments is originally
The range of application.
Be to the description only actually of at least one exemplary embodiment below it is illustrative, not as to this Shen
Please and its application or any restrictions used.
Technology, method and apparatus known to person of ordinary skill in the relevant may be not discussed in detail, but suitable
In the case of, the technology, method and apparatus should be considered as part of specification.
It is shown here and discuss all examples in, any occurrence should be construed as merely illustratively, without
It is as limitation.Therefore, other examples of exemplary embodiment can have different values.
It should be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain item exists
It is defined in one attached drawing, then in subsequent attached drawing does not need that it is further discussed.
For N grades of Dickson charge pumps, i is the positive integer more than or equal to 1 and less than or equal to N, CiFor 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 indicate are as follows:
The wherein internal resistance R of charge pumpsslWith output electric current ILIt can be expressed as respectively
The total capacitance value of charge pump can be expressed by following formula,
According to average inequality, in the case where output voltage and certain frequency, and if only if all charge pump units
When capacitor equalization, i.e. C1=C2=...=CN, export electric current ILIt is maximum:
Existing way is that the capacitance of N number of charge pump unit is set as identical, when charge pump is switched to by N times or 1/N times
When another multiplying power, existing setting method is that the capacitor of other charge pump units is simply distributed to such as first electricity
The capacitance of lotus pump unit, first charge pump unit after merging can be more much larger than other charge pump units, and charge pump
Therefore driving capability just will receive influences, and such be arranged that easily lead to first charge pump unit charge and discharge incomplete
(because RC is excessive), it is likely that limit the overall work frequency of charge pump and lead to lower driving capability.
In order to overcome the above 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 provides better output driving ability.
Fig. 1 show the module diagram of charge pump.Wherein, charge pump 100 may include that multiplying power selecting module 102 is matched
Reception input signal is set, multiplying power of the output signal relative to input signal is generated, control signal is generated also 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, to control the folding condition of each switch in charge pump main module 106.Charge pump 100 further includes electricity
Lotus pumps main module 106 including multiple charge pump units, includes capacitor and switch arrays, each charge in charge pump unit
Include switch inside pump unit, also includes switch 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 schematic diagram according to the application one embodiment.Fig. 2 shows charge pumps
Main 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
It applies in example, charge pump main module includes six charge pump units, and each charge pump list on the direction from input terminal to output end
The capacitance that member includes is C, 1/3C, 2/3C, 2/3C and C respectively, wherein C representative unit capacitance.In each charge pump unit
The bottom crown of capacitor is all coupled to output voltage V by switch respectivelyOUTAnd ground level；Capacitor is upper in adjacent charge pump unit
Pole plate is coupled to each other by switching.The top crown of the capacitor of first (namely near input terminal) charge pump unit is also logical
It crosses switch and is coupled to the input terminal 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 may be voltage-dropping type charge pump as the example of exemplary illustration.But this
Field technical staff knows, can be realized without creative efforts based on technical solution 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 charge pump shown in Fig. 2.
Fig. 3 a show the state for the operating mode that 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
Switch state controlled.
According to one embodiment, the charge pump main module in the present embodiment includes 6 charge pump units and an output electricity
Hold CL.Clock signal Φ1Control the switch S between input terminal and the first charge pump unit1, third charge pump unit and the 4th
Switch S between charge pump unit4And the 6th switch S between charge pump unit and output end7State；Φ1It also controls
First and the 4th and the 5th charge pump unit and output voltage VOUTBetween switch S8、S14And S16State and second,
Switch S between third 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；Φ2Also 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.
Switch S according to one embodiment, between second and third charge pump unit3And the 4th and the 5th charge pump
Switch S between unit5All be set as permanent on state, or perhaps under the control of significant level (such as high level) this two
A switch is connected always.
According to one embodiment, as shown in figure 4, Φ1And Φ2Two clocks not overlapped for significant level such as high level
Signal.
According to one embodiment, work as Φ1=1 Φ2When=0, switch S1And S8Conducting, switch S2And S9It disconnects, the
The capacitor C of one charge pump unit1It is entered voltage VDDIt is charged to VDD-VOUT。
Work as Φ1=0 Φ2When=1, switch S2Conducting, the capacitor C of the first charge pump unit1Electric discharge.Switch S10And S12
Conducting, switch S11And S13It disconnects, due to switch S3Perseverance conducting, the capacitor 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, switch S4It is connected, the capacitor C in second, third charge pump unit2And C3
It discharges together.Switch S14And S16Conducting, switch S15And S17It disconnects, due to switch S5Perseverance conducting, the four, the 5th charge pump units
Capacitor C4And C5Parallel connection, equivalent capacitance value C, and it is charged to VDD-3VOUT。
As Φ again1=0 Φ2When=1, switch S6It is connected, the capacitor C in the 4th and the 5th charge pump unit4With
C5It discharges together, switch S18Conducting, switch S19It disconnects, the capacitor C of the 6th charge pump unit6It is charged to VDD-4VOUT。
As Φ again1=1 Φ2When=0, switch S7Conducting, the capacitor C of the 6th charge pump unit6To output capacitance
CLElectric discharge, and output signal V is provided to output endDD-4VOUT=VOUT.Thus, it can be known that VOUT=1/5VDD。
In this embodiment, by six first order capacitor C1To C6Second level capacitor C1, C made of reconfiguring2+C3,
C4+C5, C6Equivalent capacitance value be all C.According to theory above-mentioned, under 1/5 multiplying power, the capacitance of charge pump each unit is equal,
It is achieved that maximum output driving capability.
Fig. 3 b show the state for the operating mode that 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 switch state controlled.
According to one embodiment, Φ1Control the switch S between charge pump unit1And S5State；Φ1Also control electricity
Lotus pump unit internal switch S8、S10、S13、S15、S16And S18State.Φ2Control the switch S between charge pump unit3And S7
State；Φ2Also control charge pump unit internal switch S9、S11、S12、S14、S17And S19State.
Switch S according to one embodiment, between first and second charge pump unit2, the third and fourth charge pump unit
Between switch S4And the 5th and the 6th switch S between charge pump unit6All it is set as permanent on state, or perhaps
The two switches are connected always 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 one embodiment, work as Φ1=1 Φ2When=0, switch S1、S8And S10Conducting, switch S3、S9And S11
It disconnects.Due to switch S2Perseverance conducting, the capacitor C of the first, second charge pump unit1And C2Parallel connection, equivalent capacitance value are (1+1/3)
C is charged to VDD-VOUT。
Work as Φ1=0 Φ2When=1, switch S3Conducting, the capacitor C of the first and second charge pump units1And C2Electric discharge.It opens
Close S12And S14Conducting, switch S13And S15It disconnects, due to switch S4Perseverance conducting, the capacitor C of third, the 4th charge pump unit3And C4
Parallel connection, equivalent capacitance value is (1+1/3) C, and is charged to VDD-2VOUT。
As Φ again1=1 Φ2When=0, switch S5It is connected, the capacitor C in third, the 4th charge pump unit3And C4
It discharges together.Switch S16And S18Conducting, switch S17And S19It disconnects, due to switch S5Perseverance conducting, the five, the 6th charge pump units
Capacitor C5And C6Parallel connection, equivalent capacitance value is (1+1/3) C, and is charged to VDD-3VOUT。
As Φ again1=0 Φ2When=1, switch S7Conducting, the capacitor C of the 5th and the 6th charge pump unit5And C6
To output capacitance CLElectric discharge, and output signal V is provided 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 capacitor C1-C6Made of reconfiguring
The equivalent capacitance value of second level capacitor is all (1+1/3) C.According to theory above-mentioned, charge pump is may be implemented most in such arrangement
Big output electric current.
Similar, Fig. 3 c and Fig. 3 d show the charge pump section separation structure in Fig. 2 when realizing 1/3 and 1/2 multiplying power
Working state figure.In figure 3 c, by C1+C2+C3And C4+C5+C6It is reassembled into two second level capacitors, each second level electricity
The equivalent capacitance value of appearance is 2C.In Fig. 3 d, by C1+C2+C3+C4+C5+C6It is reassembled into a second level capacitor, it is equivalent
Capacitance is 4C.
Voltage-dropping type charge pump is used 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.
It can be seen that using the charge pump in the embodiment of the present application, while realizing all integer multiplying powers, ensure that with
The equivalent capacitance value of the corresponding each two-stage charge pump unit of particular power is identical, to make charge pump that can reach under each multiplying power
To maximum output driving ability.
The method that Fig. 5 show the full multiplying power charge pump of a kind of construction according to one embodiment of the application.In the present embodiment
Charge pump the output multiplying power of 1/ (n+1) of maximum may be implemented, 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 capacitor 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 be practically necessary realization charge pump series (its correspond to multiplying power can be such as 1/ (i+
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 for being less than or equal to i more than or equal to 1, aijInteger part
It is related to the capacitor serial number to be divided, such as aijInteger part add 1 for capacitor serial number to be split.aijFractional part with
Position of the cut-point in capacitor to be split is related, such as represents the location point in the capacitor 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 exports 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 need not be split to the capacitor in each charge pump unit.When required
Output multiplying power be n 1/n when, 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
To adjust the segmentation to standard charge pump unit step by step according to required multiplying power according to this rule.
Fig. 7 is the schematic diagram that method shown in fig. 5 is split capacitor in the case where n=6.When i=6,
Capacitor 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 capacitor of the 3rd charge pump unit, at the 3/5 of the capacitor of the 4th charge pump unit, in the 5th charge
It is split at the 4/5 of the capacitor of pump unit.
When i=4, a4,jRespectively 3/2,3,9/2 and 6, it is meant that the 1/2 of the capacitor of the 2nd charge pump unit
It is split at the 1/2 of the capacitor of place and the 5th charge pump unit.
When i=3, a3,jRespectively 2,4 and 6, it does not need to be split the capacitor of charge pump unit.
When i=2, a2,jRespectively 3 and 6, it does not need to be split the capacitor of charge pump unit.
In conclusion in order to utilize the multiplying power of charge pump shown in fig. 6 realization 1 to 7 or 1 to 1/7, the 2nd charge pump unit
Capacitor need be divided 2 times, cut-point be the capacitor 1/5 and 1/2 at；The capacitor of 3rd charge pump unit needs to be divided 1
Secondary, cut-point is at the 2/5 of the capacitor；The capacitor of 4th charge pump unit needs to be divided 1 time, and cut-point is the 3/5 of the capacitor
Place；The capacitor of 5th charge pump unit needs to be divided 2 times, and cut-point is at the 1/2 and 4/5 of the capacitor；1st and the 6th charge pump
The capacitor of unit does not need to be divided.
So in the design of charge pump main module, needing to be arranged altogether 12 small to realize above-mentioned all multiplying powers
Capacitor, capacitance ratio is successively are as follows: 1,1/5,3/10,1/2,2/5,3/5,3/5,2/5,1/2,3/10,1/5,1.These capacitors
First order capacitor can be referred to as, the charge pump unit comprising this 12 small capacitances can be referred to as first order charge pump unit.
Shape can be combined to these first order charge pump units for the different multiplying of required realization according to above-described embodiment
At the identical second level charge pump unit of equivalent capacitance value, to guarantee 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 charge pump shown in FIG. 1 under different output multiplying powers
State schematic diagram.In the present embodiment, each charge pump unit capacitor having the same in charge pump main module.With traditional electricity
Unlike lotus pump, when transformation exports multiplying power, in order to realize output driving ability as big as possible, multiplying power selecting module
It can be by calculating so that the capacitance of the second level charge pump unit after reconfiguring is average as far as possible.
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 main module in the present embodiment includes that 4 charge pump units and one are defeated
Capacitor C outL.Due to four original capacitances of charge pump unit of charge pump main module be exactly it is equal, realize 1/5 times
It does not need to reconfigure charge pump unit in the case where rate and can realize maximum output driving capability.
Fig. 8 b show the state for the operating mode that the charge pump section arrangement works of the present embodiment are 1/4 in output multiplying power
Schematic diagram.
According to one embodiment, clock signal Φ1Control the switch S between input terminal and the first charge pump unit1,
Switch S between tricharged pump unit and the 4th charge pump unit4State；Φ1Also control first, second and the 4th charge
Pump unit and output voltage VOUTBetween switch S6、S8And S12State and third charge pump unit and ground level between
Switch S11State.
According to one embodiment, Φ2Control the switch S between the second charge pump unit and third charge pump3State,
And the 4th switch S between charge pump unit and output end5State；Φ2Also control first, second and the 4th charge pump
Switch S between unit and ground level7、S9And S13State and third charge pump unit and output voltage VOUTBetween open
Close S10State.
Switch S according to one embodiment, between first and second charge pump unit2It is set as permanent on state, or
Say it is that this switch is connected always 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 one embodiment, work as Φ1=1 Φ2When=0, switch S1Conducting, switch S7And S9It disconnects, due to opening
Close S2Perseverance conducting, the capacitor C of the first and second charge pump units1And C2Parallel connection, and it is entered voltage VDDIt is charged to VDD-VOUT。
Work as Φ1=0 Φ2When=1, switch S3Conducting, the capacitor C of the first and second charge pump units1And C2Electric discharge.It opens
Close S3And S10Conducting, switch S11It disconnects, the capacitor C of third charge pump unit3It is charged to VDD-2VOUT。
As Φ again1=1 Φ2When=0, switch S4Conducting, C3Electric discharge.Switch S12Conducting, switch S13It disconnects, C4
It is charged to VDD-3VOUT。
As Φ again1=0 Φ2When=1, switch S5Conducting, the capacitor C of the 4th charge pump unit4To output capacitance
CLElectric discharge, and output signal V is provided to output endDD-3VOUT=VOUT.Thus, it can be known that VOUT=1/4VDD。
In this embodiment, by including C1And C2The electricity that first and second charge pump units are recombined as the second level
Lotus pump unit, but including C3And C4First order charge pump unit it is not combined.
Fig. 8 c show the state for the operating mode that the charge pump section arrangement works of the present embodiment are 1/3 in output multiplying power
Schematic diagram.
According to one embodiment, clock signal Φ1Control the switch S between input terminal and the first charge pump unit1,
Switch S between four charge pump units and output end5State；Φ1Also control the first, second charge pump unit and output electricity
Press VOUTBetween switch S6And S8State and the third and fourth charge pump unit and ground level between switch S11And S13
State.
According to one embodiment, Φ2Control the switch S between the second charge pump unit and third charge pump3State；
Φ2Also 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.
Switch S according to one embodiment, between first and second charge pump unit2With third and the 4th charge pump unit
Between switch S4It is set as permanent on state, 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 one embodiment, work as Φ1=1 Φ2When=0, switch S1、S6And S8Conducting, switch S7And S9It disconnects,
Due to switch S2Perseverance conducting, the capacitor C of the first and second charge pump units1And C2Parallel connection, and it is entered voltage VDDIt is charged to
VDD-VOUT。
Work as Φ1=0 Φ2When=1, switch S3Conducting, the capacitor C of the first and second charge pump units1And C2Electric discharge.It opens
Close S10And S12Conducting, switch S11And S13It disconnects, due to switch S4Perseverance conducting, the capacitor C of third charge pump unit3And C4Parallel connection,
And it is charged to VDD-2VOUT。
As Φ again1=1 Φ2When=0, switch S5Conducting, 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 respectively as the charge pump unit of two groups of second level.After such reconfigure, two second
The equivalent capacitance value of grade charge pump unit is equal, to realize maximum output driving ability under 1/3 output multiplying power.
Fig. 8 d show the state for the operating mode that the charge pump section arrangement works of the present embodiment are 1/2 in output multiplying power
Schematic diagram.Four charge pump unit groups are directly combined into second level charge pump unit in this case, therefore are being realized
Without the concern for the problem that second level charge pump unit equivalent capacity is average as far as possible in the case where 1/2.
In conclusion from the point of view of the example shown in Fig. 8 a- Fig. 8 d, for electricity each in the case where 1/5 multiplying power and 1/3 multiplying power
Lotus pump unit capacitance is equal, especially for 1/3 multiplying power the case where relative to traditional way (namely for example by
One, second, third charge pump unit is combined into the case where 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 one embodiment of the application.Charge pump in the embodiment can be with
Including a first order charge pump unit of m*k+n* (k-1), the capacitance of each first order charge pump unit is equal.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 packet
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.Said combination relationship 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 charge pump unit of the second level being made of such as the n of rightmost k-1 first order charge pump unit, by the second level
K-1 first order charge pump unit in charge pump unit equably " is inserted into " others 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 of k charge pump unit.
There are 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 is uniformly inserted into the n-1 second level charges being made of k-1 first order charge pump unit
In pump unit, to form k-1 the new second level charge pump units being made of k first order charge pump unit and n-k
A second level charge pump unit being made of k-1 first order charge pump unit, to realizeMultiplying power.Formula 7 embodiesIn order to reach the combination formed close to maximum output driving ability under multiplying power.
As (n-1) < (k-1) and (k-n) < m, one of rightmost is made of k-1 first order charge pump unit
Second level charge pump unit is uniformly inserted into a second level charge pump unit being made of k-1 first order charge pump unit of n-1,
To form a second level charge pump unit being made of k first order charge pump unit of (n-1)+(m- (k-n)) and k-n
A second level charge pump unit being made of k+1 first order charge pump unit, to realizeMultiplying power.Formula 8 embodiesIn order to reach the combination formed close to maximum output driving ability under multiplying power.
Table 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.Wherein the combination in dotted line frame is the multiplying power that driving capability is improved for traditional charge pump.
Figure 10 show the method for carrying out voltage adjustment using charge pump according to the application one embodiment, wherein the electricity
The main module of lotus pump includes x first order charge pump unit, each first order charge pump unit capacitance having the same, 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；Wherein each of m second level charge pump unit includes k the
One-step charge pump unit, each of n second level charge pump unit include k-1 first order charge pump unit；
In step 1004, if x=1, stops calculating, otherwise enter step 1006；
In step 1006, one in n second level charge pump is split as k-1 first order charge pump list by x=x-1
Member；
In step 1008, the relationship of n-1 and k-1 is detected；
In step 1010, as (n-1) >=(k-1), by the k-1 first order charge pump unit insertion n-1 by k-1
In the second level charge pump unit of a first order charge pump unit composition, so that two groups of new second level charge pump units are formed,
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) < (k-1) and (k-n) < m, the k-1 first order charge pump unit is inserted into n-
1 second level charge pump unit being made of k-1 first order charge pump unit and k-n are a by k first order charge pump list
In the second level charge pump unit of member composition, to form two groups of new second level charge pump units, one group includes (n-1)+(m-
(k-n)) a 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 being described in detail by some specific embodiments of the example to the application, the skill of this field
Art personnel it should be understood that example above merely to be illustrated, rather than in order to limit scope of the present application.The skill of this field
Art personnel are it should be understood that can modify to above embodiments in the case where not departing from the scope and spirit of the present application.This Shen
Range please is defined by the following claims.
Claims (10)
1. a kind of charge pump, including
Charge pump main module, the charge pump main module include X first order charge pump unit, and wherein X is just whole greater than 1
Number, one end of the capacitor in each first order charge pump unit under any working condition its be only attached to the charge pump
Output end or ground level；
Clock module, be configured as output 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 is configured as output multiplying power as needed and controls the corresponding clock sequence of the clock module output
Column；
Wherein, clock sequence recombinates the X first order charge pump unit to the charge pump main module based on the received
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 being directed to each integer or integer
/ mono- multiplying power, Y second level charge pump unit equivalent capacitance value having the same or each second level 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 described in claim 1, wherein in Y second level charge pump unit equivalent capacity having the same
In the case where value, the capacitance of first first order charge pump unit coupled with the charge pump input terminal and with the 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 described in claim 1 further includes output capacitance, it is coupled in the output end and ground level of the charge pump
Between.
4. charge pump as claimed in claim 2, wherein when the maximum of the charge pump or minimum achievable multiplying power are n+1 or 1/
(n+1), the sum of the total capacitance value of the X first order charge pump unit is equivalent to the sum of n specific capacitance, and i+1 is practical needs
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, aijThe integer part of=n*j/i adds 1 to represent specific capacitance serial number where j-th of second level charge pump unit, score
Part represents the division position in the specific capacitance where j-th of second level charge pump unit.
5. charge pump as described in claim 1, wherein the capacitor first end is coupled to previous first by first switch
The output end of grade charge pump unit, and the first end of the capacitor is coupled to next first order charge pump by second switch
The input terminal of unit, the second end of the capacitor are coupled to the output end of the charge pump by third switch, the capacitor
Second end is coupled to ground level by the 4th switch；
Wherein the 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 such as charge pump as claimed in any one of claims 1 to 5.
7. a kind of flash memory device, including such as charge pump as claimed in any one of claims 1 to 5.
8. a kind of power supply, including such as charge pump as claimed in any one of claims 1 to 5.
9. a kind of method using charge pump adjustment voltage, wherein the charge pump includes charge pump main module, clock module and
Multiplying power selecting module, the method includes
The multiplying power selecting module controls the corresponding clock sequence of generation of clock module according to required output multiplying power；
The clock module exports corresponding clock sequence under the control of the multiplying power selecting module；
The charge pump main module based on the received clock sequence by X first order charge in the charge pump main 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 equivalent capacitance value having the same 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, each first order electricity
One end of capacitor in lotus pump unit is only attached to the output end or ground level of the charge pump under any working condition.
10. a kind of method for carrying out voltage adjustment using charge pump, wherein the charge pump includes charge pump main module, clock mould
Block and multiplying power selecting module, the charge pump main module include X first order charge pump unit, each first order charge pump
Unit capacitance having the same, the method 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
A second level charge pump unit；Wherein each of m second level charge pump unit includes k first order charge pump list
Member, each of n second level charge pump unit 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), by the k-1 first order charge pump unit insertion n-1 by k-1 first order charge pump
In the second level charge pump unit of unit composition, 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) < (k-1) and (k-n) < m, by the k-1 first order charge pump unit insertion n-1 by k-1 first
The second level charge pump unit of grade charge pump unit composition and the k-n second level being made of k first order charge pump unit
In charge pump unit, to form two groups of new second level charge pump units, one group includes a second level (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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| CN111817553B (en) * | 2020-07-01 | 2021-12-24 | 浙江驰拓科技有限公司 | On-chip charge pump circuit |
| CN111969845B (en) * | 2020-09-04 | 2022-01-11 | 广东工业大学 | Mixed type reconfigurable charge pump circuit |
| CN115864830B (en) * | 2023-02-15 | 2023-06-02 | 深圳通锐微电子技术有限公司 | Negative pressure divides two conversion circuit and equipment terminal |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5481447A (en) * | 1995-04-27 | 1996-01-02 | Fluke Corporation | Switched capacitance voltage multiplier with commutation |
| CN101043178A (en) * | 2006-03-22 | 2007-09-26 | 罗姆股份有限公司 | Semiconductor integrated circuit device, charge pump circuit, and electric appliance |
| CN103460578A (en) * | 2010-12-23 | 2013-12-18 | 沃福森微电子股份有限公司 | Charge pump circuit |
| CN203537232U (en) * | 2013-09-25 | 2014-04-09 | 无锡中星微电子有限公司 | Charge pump device |
| CN105229909A (en) * | 2013-03-15 | 2016-01-06 | 北极砂技术有限公司 | Restructural switched capacitor power converter technology |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9800143B2 (en) * | 2016-03-03 | 2017-10-24 | The Regents Of The University Of Michigan | Moving-sum charge pump |
-
2017
- 2017-11-06 CN CN201711079617.7A patent/CN107742978B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5481447A (en) * | 1995-04-27 | 1996-01-02 | Fluke Corporation | Switched capacitance voltage multiplier with commutation |
| CN101043178A (en) * | 2006-03-22 | 2007-09-26 | 罗姆股份有限公司 | Semiconductor integrated circuit device, charge pump circuit, and electric appliance |
| CN103460578A (en) * | 2010-12-23 | 2013-12-18 | 沃福森微电子股份有限公司 | Charge pump circuit |
| CN105229909A (en) * | 2013-03-15 | 2016-01-06 | 北极砂技术有限公司 | Restructural switched capacitor power converter technology |
| CN203537232U (en) * | 2013-09-25 | 2014-04-09 | 无锡中星微电子有限公司 | Charge pump device |
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