CN105915046B - A kind of control electrical appliances for electric charge pump - Google Patents
A kind of control electrical appliances for electric charge pump Download PDFInfo
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- CN105915046B CN105915046B CN201610270416.4A CN201610270416A CN105915046B CN 105915046 B CN105915046 B CN 105915046B CN 201610270416 A CN201610270416 A CN 201610270416A CN 105915046 B CN105915046 B CN 105915046B
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- Prior art keywords
- charge pump
- voltage
- switching tube
- connect
- output
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Classifications
-
- 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
- H02M3/073—Charge pumps of the Schenkel-type
-
- 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
- H02M3/073—Charge pumps of the Schenkel-type
- H02M3/077—Charge pumps of the Schenkel-type with parallel connected charge pump stages
Abstract
The invention discloses a kind of control electrical appliances for electric charge pump, including：Charge pump；First feedback circuit, first feedback circuit obtain the first sampled voltage, and adjust the output voltage by the comparison result of first sampled voltage and reference voltage for being sampled to the output voltage of the charge pump by the first feedback resistance string；Second feedback circuit, second feedback circuit obtain the second sampled voltage, and times die pressing type of the charge pump is adjusted according to input voltage and second sampled voltage for being sampled to the output voltage of the charge pump by the second feedback resistance string.The control electrical appliances for electric charge pump can adjust times die pressing type of charge pump by the second feedback circuit, and the output voltage of charge pump can also be adjusted by the first feedback circuit, and the scope of application of the control electrical appliances for electric charge pump is wider.
Description
Technical field
The present invention relates to power-supply management system field of circuit technology, more specifically, being related to a kind of control electrical appliances for electric charge pump.
Background technology
For portable functional product, the diversification of function and the miniaturization trend of volume require power supply chip
More stringent requirements are proposed for volume and area occupied using smaller package dimension, therefore to power supply IC.In addition cost performance
An important factor for height also competes as various chip products, and clear superiority of the charge pump in volume, cost, and charge
Pump overcomes the EMI problems that the power source based on inductance may be brought, keeps its application prospect more extensive without inductance.Efficient
Rate, low-power consumption, low EMI are adjusted in the power-supply management system of output, and charge pump is only choosing.
Charge pump needs to control the operating mode of charge pump by control electrical appliances for electric charge pump.Existing charge pump control electricity
Road can only control the multiplication of voltage operating mode of charge pump according to input voltage so that charge pump is defeated under different multiplication of voltage operating modes
Go out constant output voltage.
Since existing control electrical appliances for electric charge pump can only make charge pump export constant output voltage, charge cannot achieve
The controllability of the output voltage of pump.
Invention content
To solve the above problems, the present invention provides a kind of control electrical appliances for electric charge pump, the control electrical appliances for electric charge pump can be with
The output voltage of charge pump is adjusted,
To achieve the goals above, the present invention provides the following technical solutions：
A kind of control electrical appliances for electric charge pump, the control electrical appliances for electric charge pump include：
A kind of control electrical appliances for electric charge pump, the control electrical appliances for electric charge pump include：
Charge pump；
First feedback circuit, first feedback circuit are used to pass through output of the first feedback resistance string to the charge pump
Voltage is sampled, and obtains the first sampled voltage, and adjust by the comparison result of first sampled voltage and reference voltage
The output voltage；
Second feedback circuit, second feedback circuit are used to pass through output of the second feedback resistance string to the charge pump
Voltage is sampled, and obtains the second sampled voltage, and adjust the charge according to input voltage and second sampled voltage
Times die pressing type of pump.
Optional, in above-mentioned control electrical appliances for electric charge pump, the charge pump has input interface, output interface, multiplication of voltage
Control interface and clock interface；
The input interface is for inputting the input voltage；
The output interface is for exporting the output voltage.
Optional, in above-mentioned control electrical appliances for electric charge pump, the first feedback resistance string includes：First resistor and
Two resistance；First feedback circuit includes：The first resistor, the second resistance and output voltage feedback control mould
Block；
The first end of the first resistor is connect with the output interface, and second end is grounded by the second resistance；
The first input end of the output voltage feedback control module is connect with the first end of the first resistor, and second
Input terminal inputs the reference voltage, and output end is connect with the first input end of clocked logic control module；
The output end of the clocked logic control module is connect with the clock interface.
Optional, in above-mentioned control electrical appliances for electric charge pump, the second feedback resistance string includes：3rd resistor and
Four resistance；Second feedback circuit includes：The 3rd resistor, the 4th resistance and charge pump multiplication of voltage scheme control mould
Block；
The first end of the 3rd resistor is connect with the output interface, and second end passes through the 4th resistance eutral grounding；
The first input end of the charge pump multiplication of voltage mode control module and the first end of divider resistance connect, and second is defeated
Enter end to connect with the second end of the 3rd resistor, the first output end is connect with the multiplication of voltage control interface, the second output
End is connect with the second input terminal of the clocked logic control module；
The second end of the divider resistance inputs the input voltage.
Optional, in above-mentioned control electrical appliances for electric charge pump, the charge pump includes：
First pole of first switch pipe, the first switch pipe is connect with the input interface, the second pole and first segment
Point connection；
First pole of second switch pipe, the second switch pipe is connect with the first node, the second pole with it is described defeated
Outgoing interface connects；
First pole of third switching tube, the third switching tube is connect with the input interface, the second pole and the second section
Point connection；
First pole of the 4th switching tube, the 4th switching tube is connect with third node, and the second pole is saved with described second
Point connection；
First pole of the 5th switching tube, the 5th switching tube is connect with the input interface, the second pole and described the
Three nodes connect；
First pole of the 6th switching tube, the 6th switching tube is connect with the third node, the second pole with it is described defeated
Outgoing interface connects；
First pole of the 7th switching tube, the 7th switching tube is connect with the input interface, the second pole with Section four
Point connection；
First pole of the 8th switching tube, the 8th switching tube is connect with the second node, the second pole ground connection；
First pole of the 9th switching tube, the 9th switching tube is connect with the fourth node, the second pole ground connection；
One pole plate of the first pump capacitance, the first pump capacitance connects the first node, another pole plate connects institute
State second node；
One pole plate of the second pump capacitance, the second pump capacitance connects the third node, another pole plate connects institute
State fourth node；
The control terminal of all switching tubes is all connected with the clock interface.
Optional, in above-mentioned control electrical appliances for electric charge pump,
The substrate of the first switch pipe is connect with the first node；
The substrate of the second switch pipe is connect with the output interface；
The substrate of the third switching tube is connect with the input interface；
The substrate of 4th switching tube is connect with the third node；
The substrate of 5th switching tube pumps capacitance connection with described second；
The substrate of 6th switching tube is connect with the output interface；
The substrate of 7th switching tube is connect with the input interface；
The Substrate ground of 8th switching tube；
The Substrate ground of 9th switching tube.
Optional, in above-mentioned control electrical appliances for electric charge pump, the charge pump further includes：No. 2 selectors, the 2 tunnel choosing
The control terminal input control voltage of device is selected, first input end inputs the output voltage, the second input terminal and the third
Node connects, and output end is connect with the substrate of the 5th switching tube.
Optional, in above-mentioned control electrical appliances for electric charge pump, the charge pump has 1.5 multiplication of voltage operating modes and 2 times
Press operating mode；
When the charge pump is in 1.5 multiplication of voltage operating mode, the control voltage is low level, No. 2 selector
Output end export the output voltage；
When the charge pump is in 2 multiplication of voltage operating mode, the control voltage is high level, No. 2 selector
Output end exports the voltage of third node described in the output voltage.
Optional, in above-mentioned control electrical appliances for electric charge pump, the first switch pipe, the second switch pipe, described
Three switching tubes, the 4th switching tube, the 5th switching tube, the 6th switching tube and the 7th switching tube are
PMOS；
8th switching tube and the 9th switching tube are NMOS.
It is optional, in above-mentioned control electrical appliances for electric charge pump, the third input terminal of the clocked logic control module with shake
Swing device connection.
By foregoing description it is found that control electrical appliances for electric charge pump provided by the invention includes：Charge pump；First feedback circuit,
First feedback circuit obtains first for being sampled to the output voltage of the charge pump by the first feedback resistance string
Sampled voltage, and the output voltage is adjusted by the comparison result of first sampled voltage and reference voltage；Second feedback
Circuit, second feedback circuit are obtained for being sampled to the output voltage of the charge pump by the second feedback resistance string
The second sampled voltage is taken, and adjusts times die pressing type of the charge pump according to input voltage and second sampled voltage.Institute
Times die pressing type of charge pump can be adjusted by the second feedback circuit by stating control electrical appliances for electric charge pump, can also pass through the first feedback electricity
Road adjusts the output voltage of charge pump, and the scope of application of the control electrical appliances for electric charge pump is wider.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is a kind of structural schematic diagram of control electrical appliances for electric charge pump provided in an embodiment of the present invention；
Fig. 2 is times die pressing type transition diagram of control electrical appliances for electric charge pump shown in Fig. 1；
Fig. 3 is a kind of circuit diagram of charge pump provided in an embodiment of the present invention.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The output voltage of existing control electrical appliances for electric charge pump is fixed value, generally by comparison input voltage and reference electricity
It presses come the suitable multiplication of voltage operating mode of selection of sentencing, the influence of the bulk effect of the power switch tube of charge pump cannot be completely eliminated.
Since existing control electrical appliances for electric charge pump can only export a fixed voltage value, then operation strategies can be very limited, is not suitable for defeated
Go out the adjustable applicable cases of voltage.And since existing control electrical appliances for electric charge pump cannot completely eliminate the bulk effect of power switch tube
It influences, power switch tube threshold voltage is larger, to reduce the transfer efficiency and driving capability of the charge pump.
The embodiment of the present invention is directed to the fixation output voltage values of existing control electrical appliances for electric charge pump, and there are effect of bulk effect, drive
Kinetic force is insufficient, the relatively low problem of transfer efficiency, and it is adjustable to provide a kind of output voltage with double loop feedback, can disappear
Except the control electrical appliances for electric charge pump of effect of bulk effect.
To solve the above-mentioned problems, an embodiment of the present invention provides a kind of control electrical appliances for electric charge pump, charge pump control electricity
Road includes：
Charge pump；
First feedback circuit, first feedback circuit are used to pass through output of the first feedback resistance string to the charge pump
Voltage is sampled, and obtains the first sampled voltage, and adjust by the comparison result of first sampled voltage and reference voltage
The output voltage；
Second feedback circuit, second feedback circuit are used to pass through output of the second feedback resistance string to the charge pump
Voltage is sampled, and obtains the second sampled voltage, and adjust the charge according to input voltage and second sampled voltage
Times die pressing type of pump.
As it can be seen that the control electrical appliances for electric charge pump can adjust times die pressing type of charge pump by the second feedback circuit, may be used also
To adjust the output voltage of charge pump by the first feedback circuit, the scope of application of the control electrical appliances for electric charge pump is wider.
In order to keep technical solution provided in an embodiment of the present invention clearer, said program is carried out below in conjunction with the accompanying drawings detailed
Thin description.
With reference to figure 1, Fig. 1 is a kind of structural schematic diagram of control electrical appliances for electric charge pump provided in an embodiment of the present invention, the electricity
Lotus pump control circuit includes：Charge pump 11；First feedback circuit, first feedback circuit are used to pass through the first feedback resistance string
The output voltage VO UT of the charge pump 11 is sampled, obtains the first sampled voltage FB1, and pass through the first sampling electricity
The comparison result of FB1 and reference voltage VREF is pressed to adjust the output voltage VO UT；Second feedback circuit, the second feedback electricity
Road obtains the second sampled voltage for being sampled to the output voltage VO UT of the charge pump 11 by the second feedback resistance string
FB2, and adjust according to input voltage VIN and the second sampled voltage FB2 times die pressing type of the charge pump 11.
As shown in Figure 1, the charge pump 11 has input interface D1, output interface D2, multiplication of voltage control interface D3 with timely
Clock interface D4；The input interface is for inputting the input voltage VIN；The output interface D2 is for exporting the output electricity
Press VOUT.Optionally, the charge pump 11 is 1.5X/2X adaptive charge pumps.The charge pump 11 has 1.5 multiplication of voltage Working moulds
Formula and 2 multiplication of voltage operating modes.Wherein, 1.5X indicates that 1.5 multiplication of voltage operating modes, 2X indicate 2 multiplication of voltage operating modes.
Optionally, the first feedback resistance string includes：First resistor R1 and second resistance R2；The first feedback electricity
Road includes：The first resistor R1, the second resistance R2 and output voltage feedback control module 14.The first resistor R1
First end connect with the output interface D2, second end is grounded by the second resistance R2.The output voltage feedback
The first input end of control module 14 is connect with the second end of the first resistor R1, and the input of the second input terminal is described with reference to electricity
VREF, output end is pressed to be connect with the first input end of clocked logic control module 13.The clocked logic control module 14
Output end is connect with the clock interface D4.The charge pump 11 includes multiple switch pipe.Optionally, the switching tube is power
Switching tube.The clocked logic control module 13 can control the switch shape of the multiple switching tube by corresponding clock signal
State.
The first resistor R1 is adjustable resistance, and resistance value size is by more bit Digital Signals.By the resistance for adjusting R1
It is worth size, the adjustable range of output voltage VO UT can be set by adjusting first resistor R1.R1 is adjustable resistance, resistance value size
By Digital Signals, such as when control signal is 000, output voltage is minimum, and the resistance value of R1 at this moment is minimum；Such as control letter
When number being 111, output voltage highest, the resistance value of R1 at this moment is maximum.
Optionally, the second feedback resistance string includes 3rd resistor R3 and the 4th resistance R4.The second feedback electricity
Road includes：The 3rd resistor R3, the 4th resistance R4 and charge pump multiplication of voltage mode control module 12.The 3rd resistor
The first end of R3 is connect with the output interface D2, and second end is grounded by the 4th resistance R4.The charge pump multiplication of voltage
The first input end of mode control module 12 is connect with the first end of divider resistance R5, the second input terminal and the 3rd resistor
The second end of R3 connects, and the first output end is connect with the multiplication of voltage control interface D3, and second output terminal is patrolled with the clock
Collect the second input terminal connection of control module 13.The second end input input voltage VIN of the divider resistance R5, first
End is grounded by divider resistance R6.The output of the charge pump multiplication of voltage mode control module 12 control voltage VMODE, for controlling electricity
Times die pressing type of lotus pump 11.
The third input terminal of the clocked logic control module 13 is connect with oscillator 15.It is generated by the oscillator 15
Square-wave signal.The clocked logic control module 13 generates clock signal according to the square-wave signal.
Optionally, the control electrical appliances for electric charge pump further includes output capacitance Cout.A pole of the output capacitance Cout
Plate is connect with the output interface D2, another pole plate ground connection.The control electrical appliances for electric charge pump further includes electrical power by-pass capacitance
Mono- pole plate of Cin, the electrical power by-pass capacitance Cin inputs the input voltage VIN, another pole plate ground connection.
Below to the Principles of Regulation and charge of the multiplication of voltage operating mode of control electrical appliances for electric charge pump described in the embodiment of the present invention
The Principles of Regulation of the output voltage of pump are specifically described.
In control electrical appliances for electric charge pump shown in Fig. 1, output voltage feedback control module 14 passes through adjustable first feedback electricity
Resistance string samples output voltage VO UT, obtains the first sampled voltage FB1.Output voltage feedback control module 14 has first
Comparator, by the first comparator by the first sampled voltage FB1 compared with reference voltage VREF, if the first sampled voltage
FB1 is higher than reference voltage VREF, and first comparator exports high level to clock Logic control module 13, the switching tube of charge pump 11
Then can be all off, charge pump 11 stops charging to output capacitance Cout.
When the switching tube of charge pump 11 is all off, electric current is provided from output capacitance Cout to load, that is, passes through output
Capacitance Cout electric discharges provide output voltage VO UT, and with the electric discharge of output capacitance Cout, output voltage VO UT is continuously decreased, until
Current first sampled voltage FB1 is less than reference voltage VREF.When the first sampled voltage FB1 is less than reference voltage VREF, first
Comparator exports low level to clock Logic control module 13, and charge pump 11 starts power up, i.e., charge pump 11 starts to work normally,
It charges to output capacitance Cout, and is load supplying, until output voltage VO UT is higher than preset voltage value.Wherein, load with it is defeated
Outgoing interface connects.In this way, output voltage VO UT can centered on preset voltage value up and down fuctuation within a narrow range.
Specifically, when first comparator judges that the first sampled voltage FB1 is higher than reference voltage VREF, charge pump switches
All off, at this moment output voltage VO UT is reduced, and is less than reference voltage when output voltage VO UT drops to the first sampled voltage FB1
When VREF, charge pump 11 can rework again, and such output voltage VO UT will be centered on scheduled voltage value, up and down slightly
The amplitude of fluctuation, output voltage VO UT fluctuations depends on the offset voltage and loop reaction speed of first comparator.
By foregoing description it is found that control electrical appliances for electric charge pump described in the embodiment of the present invention can be according to the difference of sampled voltage
Adjust the size of output voltage VO UT, the voltage range that output voltage VO UT can be limited in the lower limiting value and the upper limit value
It adjusts.The adjustment process of above-mentioned output voltage is pulse skipping modulation, while being also first of the control electrical appliances for electric charge pump anti-
The operation principle that the range of output voltage is adjusted in feedback branch.Output can be set by adjusting the size of first resistor R1
The adjustable range of voltage VOUT.
Second feedback circuit is by the second feedback resistance string (3rd resistor R3 and the 4th resistance R4) to the charge pump
Output voltage VO UT sampled, obtain the second sampled voltage FB2.Charge pump multiplication of voltage mode control module 12 includes having late
Second comparator of stagnant function, second comparator are used for the second sampled voltage FB2 compared with third sampled voltage FB3.
Optionally, the second sampled voltage FB2 is the 66.7% of output voltage VO UT.Third feedback resistance string is to input voltage
VIN is sampled, and the third sampled voltage FB3 is obtained.The third sampled voltage FB3 can be input voltage VIN
90%.The third feedback resistance string includes the branch pressure voltage R5 and divider resistance R6.It can be by the way that 3rd resistor be arranged
The ratio of R3 and the 4th resistance R4 set percentages of the second sampled voltage FB2 relative to output voltage VO UT, can pass through
Percentages of the ratio setting third sampled voltage FB3 of divider resistance R5 and divider resistance R6 relative to input voltage VIN is set
Than percentage and third sampled voltage of the second sampled voltage FB2 relative to output voltage VO UT can be designed as needed
Percentages of the FB3 relative to input voltage VIN, it is not limited to the numerical value that the embodiment of the present invention is illustrated.
Initial time, charge pump 11 start power up, and charge pump multiplication of voltage mode control module 12 controls charge pump 11 and locates first
In 1.5 multiplication of voltage operating modes, the second sampled voltage FB2 is equal to 66.7%*VOUT.If 66.7%*VOUT is less than 95%*VIN, and
Output voltage VO UT has reached preset voltage value, and the selection control charge pump 11 of charge pump multiplication of voltage mode control module 12 continues
It under 1.5 multiplication of voltage operating modes, charges for charge pump, charge pump generates output voltage.Second comparator is hysteresis comparator, is had
Retarding window, when the second sampled voltage FB2 is compared with 90%*VIN, such as it is required that the output of the second comparator is high electricity
Flat, then the second sampled voltage FB2 will be more than 95%*VIN, such as it is required that the output of the second comparator is low level, then second
Sampled voltage FB2 will be less than 85%*VIN, and the second comparator is centered on 90%, positive and negative 5% retarding window.
If 95%*1.5*VIN is still below preset voltage value, charge pump 11 can continue to fill under 1.5 multiplication of voltage operating modes
Electricity, until sampling and outputting voltage 66.7%*VOUT be more than 95%*VIN, at this point, charge pump multiplication of voltage mode control module 12 can be selected
It selects control charge pump to charge under 2 multiplication of voltage operating modes, generates output voltage.When charge pump 11 is in 2 multiplication of voltage mode of operation
When, it, then can be under 2 multiplication of voltage operating modes when output voltage VO UT reductions or input voltage VIN raising, charge pump times die pressing type
Control module 12 judges that output voltage VO UT is higher than preset voltage value, and controls charge pump 11 and stop filling to output capacitance Cout
Electricity, until output voltage VO UT drops to lower limiting value.If corresponding sampled voltage 66.7%*VOUT is less than 85%*VIN, at this point, electric
Lotus pump multiplication of voltage mode control module 12 can select control charge pump to charge under 1.5 multiplication of voltage operating modes, generate output voltage
VOUT。
As shown in Figure 1, unlike existing control electrical appliances for electric charge pump scheme, charge pump described in the embodiment of the present invention controls
The output voltage VO UT of circuit is adjustable, and output voltage VO UT has certain output area.The charge pump control electricity
There are 2 backfeed loops in road, first backfeed loop be by the first feedback resistance string, output voltage feedback control module 14,
Clocked logic control module 14 and charge pump 11 form.Article 2 backfeed loop is by the second feedback resistance string, charge pump times
Die pressing type control module 12, clocked logic control module 14 and charge pump 11 form.
Wherein, first resistor R1 is adjustable resistor, and resistance value is adjustable to export by more bit Digital Signals
Output voltage VO UT.Output voltage VO UT expression formulas are：
Article 2 backfeed loop is by compared with third sampled voltage FB3, tying the second sampled voltage FB2 according to comparing
Fruit control charge pump 11 is in suitable times of die pressing type.In general, the second sampled voltage FB2=VOUT/1.5=of setting
66.7%*VOUT.Third sampled voltage FB3=90%*VIN is set.
With reference to figure 2, Fig. 2 is times die pressing type transition diagram of control electrical appliances for electric charge pump shown in Fig. 1.As shown in Fig. 2, defeated
When going out that voltage is relatively low or input voltage is higher, i.e., output voltage is not higher than 95%*1.5*VIN, charge pump multiplication of voltage scheme control mould
Block can select control charge pump to be in 1.5 multiplication of voltage operating modes；With the raising of output voltage or the reduction of input voltage, output
Voltage is higher than 95%*1.5*VIN, then charge pump multiplication of voltage mode control module can select control charge pump to be in 2 multiplication of voltage Working moulds
Formula；When charge pump is in 2 multiplication of voltage operating mode, if output voltage reduces or input voltage increases, when output voltage is less than
85%*1.5*VIN, then charge pump multiplication of voltage mode control module can select control charge pump be in 1.5 multiplication of voltage operating modes.
By foregoing description it is found that control electrical appliances for electric charge pump described in the embodiment of the present invention, output voltage VO UT is designed as
More adjustable output voltages of bit have larger output voltage range, while improving the multiplication of voltage model selection machine of charge pump
System.The multiplication of voltage mode selection mechanism of existing control electrical appliances for electric charge pump is by comparing input voltage and reference voltage, and monitoring is defeated
Enter the variation of voltage to select a times die pressing type.And the multiplication of voltage mode selection mechanism of the control electrical appliances for electric charge pump of the embodiment of the present invention is
By comparing input voltage and output voltage, monitor input voltage and output voltage size judge to select be suitble to it is selected defeated
Go out times die pressing type of voltage so that the size of output voltage is adjustable.
And control electrical appliances for electric charge pump described in the embodiment of the present invention be combine complementary 2 multiplication of voltage control electrical appliances for electric charge pump with
1.5 multiplication of voltage control electrical appliances for electric charge pump circuits, the control electrical appliances for electric charge pump are adaptive charge pump circuit, can be according to output electricity
Pressure and input voltage automatically adjust times die pressing type.Control electrical appliances for electric charge pump described in the embodiment of the present invention is than existing 2 times of piezoelectricity
The driving capability of lotus pump control circuit is high, and output ripple is far below the output ripple of existing 2 multiplication of voltage control electrical appliances for electric charge pump.
With reference to figure 3, Fig. 3 is a kind of circuit diagram of charge pump provided in an embodiment of the present invention, and shown charge pump includes：First
Switching tube M1, second switch pipe M2, third switching tube M3, the 4th switching tube M4, the 5th switching tube M5, the 6th switching tube M6,
Seven switching tube M7, the 8th switching tube M8, the 9th switching tube M9, the first pump capacitance C1 and the second pump capacitance C2.
The first pole of the first switch pipe M1 and the input interface of charge pump connect, 1. the second pole connects with first node
It connects.1. the first pole of the second switch pipe M2 is connect with the first node, the output interface of the second pole and charge pump connects
It connects.The first pole of the third switching tube M3 is connect with the input interface, 2. the second pole is connect with second node.Described
3. the first pole of four switching tube M4 is connect with third node, 2. the second pole is connect with the second node.5th switch
The first pole of pipe M5 is connect with the input interface, 3. the second pole is connect with the third node.The 6th switching tube M6
The first pole 3. connect with the third node, the second pole is connect with the output interface.The of the 7th switching tube M7
One pole is connect with the input interface, 4. the second pole is connect with fourth node.The first pole of the 8th switching tube M8 and institute
It states second node 2. to connect, the second pole ground connection.4. the first pole of the 9th switching tube M9 is connect with the fourth node,
Second pole is grounded.1. a pole plate of the first pump capacitance C1 connects the first node, another pole plate connection described the
Two nodes are 2..3. a pole plate of the second pump capacitance C2 connects the third node, another pole plate connection the described 4th
Node is 4..The control terminal of all switching tubes is all connected with the clock interface of the charge pump.
In order to eliminate the bulk effect of each pipe that opens the light, the substrate of the first switch pipe M1 is connect with the first node；
The substrate of the second switch pipe M2 is connect with the output interface；The substrate of the third switching tube M3 and the input interface
Connection；The substrate of the 4th switching tube M4 is connect with the third node；The substrate of the 5th switching tube M5 and described the
Two pump capacitance connections；The substrate of the 6th switching tube M6 is connect with the output interface；The substrate of the 7th switching tube M7
It is connect with the input interface；The Substrate ground of the 8th switching tube M8；The Substrate ground of the 9th switching tube M9.
The charge pump further includes：No. 2 selectors 31, the control terminal input control voltage of No. 2 selector 31
VMODE, first input end input the output voltage, and 3. the second input terminal is connect with the third node, output end
It is connect with the substrate of the 5th switching tube M5.The control terminal of No. 2 selector 31 is connect with multiplication of voltage control interface, Jin Eryu
The charge pump multiplication of voltage mode control module of control electrical appliances for electric charge pump connects.
When the charge pump is in 1.5 multiplication of voltage operating mode, the control voltage VMODE is low level, the 2 tunnel choosing
The output end for selecting device exports the output voltage VO UT.When the charge pump is in 2 multiplication of voltage operating mode, the control voltage
VMODE is high level, and the output end of No. 2 selector exports the voltage of third node 3. described in the output voltage.
Optionally, the first switch pipe M1, the second switch pipe M2, the third switching tube M3, the described 4th open
It is PMOS to close pipe M4, the 5th switching tube M5, the 6th switching tube M6 and the 7th switching tube M7；Described 8th
Switching tube M8 and the 9th switching tube M9 is NMOS.In the embodiment of the present invention, the one of first electrode and second electrode
Person indicates that the source electrode of MOS, another one indicate the drain electrode of MOS.
Charge pump circuit shown in Fig. 3 is made of 9 switching tubes and 2 pump capacitances.In Fig. 3, Cin is electrical power by-pass capacitance,
C1, C2 are pump capacitance, and Cout is output capacitance.
The control terminal of all switching tubes connects clock interface, by two clock signal CK1 and CK2 with complementary phases
Control, by 9 switching tube being switched on or off under out of phase in 3 circuit of control figure, may be implemented 2 kinds of desired voltages
Yield value.Under the control of clock signal CK1 and CK2, under different multiplication of voltage operating modes, the switching tube being closed is needed such as
Shown in table 1.
Table 1
| The perfect Gain | The switching tube being closed when CK1 | The switching tube being closed when CK2 |
| 1.5 multiplication of voltage operating modes | M1、M4、M9 | M2、M3、M6、M7 |
| 2 multiplication of voltage operating modes | M1、M6、M7、M8 | M2、M3、M5、M9 |
As shown in figure 3, the substrate electric potential of all PMOS in the adaptive charge pump circuit is connected to the source and drain of respective pipe
Relatively high one end in both ends, the substrate electric potential of all NMOS are connected to current potential is relatively low in the source and drain both ends of respective pipe one
End.
Since the 5th switching tube M5 is off always under 1.5 multiplication of voltage operating modes, then its substrate electric potential should connect
Maximum potential connects output current potential.And the 5th switching tube M5 is in opening state in half period under 2 multiplication of voltage operating modes
State, then in order to eliminate the 5th switching tube M5 in the bulk effect of conducting phase, then its substrate electric potential meets M5 and needs and pump capacitance C2 phases
Even so that the 5th switching tube M5 substrates one end relatively high with current potential in its source and drain both ends is connect.Due to being in different multiplication of voltages
The substrate electric potential connection of the 5th switching tube M5 is different under pattern, in order to which in conducting phase, receptor effect does not influence the 5th switching tube M5
Its conducting resistance does not allow the Under Positive Substrate Bias due to the 5th switching tube M5 to lead to the 5th switching tube M5 conducting leakages in off-phases
Electricity then needs the substrate electric potential for making the 5th switching tube M5 to change with the variation of die pressing type again, as shown in figure 3, by one by
No. 2 selectors 31 of multiplication of voltage mode signal control control the 5th switching tube M5 substrate electric potentials.In 1.5 multiplication of voltage operating mode, 2
Road selector 31 can select substrate electric potential access output voltage VO UT；In 2 multiplication of voltage operating mode, No. 2 selectors 31 can select
Substrate electric potential is linked into one end that M5 is connected with pump capacitance C2.
Charge pump described in the embodiment of the present invention be 2 complementary multiplication of voltage charge pumps be combined with 1.5 multiplication of voltage charge pumps oneself
Adapt to charge pump.Charge pump described in the embodiment of the present invention and the output voltage in existing charge pump and output impedance such as the following table 2 institute
Show.
Wherein, RiFor the equivalent resistance of charge pump when all switching tubes are connected in charge pump.C1/2For the first pump of charge pump
The capacitance of capacitance or the second pump capacitance.First pump capacitance is identical as the second pump capacitance of capacitance.F is the frequency of clock signal
Rate.IloadFor load current.
Charge pump described in the embodiment of the present invention is for bulk effect problem present in current charge pump, by all of charge pump
Higher one end of current potential that the substrate electric potential of switching tube is connected in the both ends of respective metal-oxide-semiconductor, Vbs is 0 when switching tube is connected, from
And effect of bulk effect is eliminated, threshold voltage not will increase, and conducting resistance not will increase.Such as upper table 2 it is found that due to of the invention real
Apply the influence that the example charge pump considers bulk effect switch tube conducting resistance, therefore charge pump described in the embodiment of the present invention
Output impedance ROUTThe output impedance R of existing charge pump can be much smaller thanOUT, so the driving energy of charge pump described in the embodiment of the present invention
Power is stronger, in identical driving current, the transfer efficiency higher of charge pump described in the embodiment of the present invention.
By foregoing description it is found that control electrical appliances for electric charge pump provided in an embodiment of the present invention can automatically adjust charge pump
The size of output voltage can be adapted for the application scenarios for needing different output voltages；The bulk effect of charge pump is eliminated simultaneously,
Improve driving capability and transfer efficiency.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest range caused.
Claims (10)
1. a kind of control electrical appliances for electric charge pump, which is characterized in that including：
Charge pump；
First feedback circuit, first feedback circuit are used for the output voltage to the charge pump by the first feedback resistance string
It is sampled, obtains the first sampled voltage, and by described in the adjusting of the comparison result of first sampled voltage and reference voltage
Output voltage；
Second feedback circuit, second feedback circuit are used for the output voltage to the charge pump by the second feedback resistance string
It is sampled, obtains the second sampled voltage, and the charge pump is adjusted according to input voltage and second sampled voltage
Times die pressing type；The output voltage is designed as the adjustable output voltages of more bit by the control electrical appliances for electric charge pump.
2. control electrical appliances for electric charge pump according to claim 1, which is characterized in that the charge pump has input interface, defeated
Outgoing interface, multiplication of voltage control interface and clock interface；
The input interface is for inputting the input voltage；
The output interface is for exporting the output voltage.
3. control electrical appliances for electric charge pump according to claim 2, which is characterized in that the first feedback resistance string includes：The
One resistance and second resistance；First feedback circuit includes：The first resistor, the second resistance and output voltage
Feedback control module；
The first end of the first resistor is connect with the output interface, and second end is grounded by the second resistance；
The first input end of the output voltage feedback control module is connect with the second end of the first resistor, the second input
End inputs the reference voltage, and output end is connect with the first input end of clocked logic control module；
The output end of the clocked logic control module is connect with the clock interface.
4. control electrical appliances for electric charge pump according to claim 3, which is characterized in that the second feedback resistance string includes：The
Three resistance and the 4th resistance；Second feedback circuit includes：The 3rd resistor, the 4th resistance and charge pump times
Die pressing type control module；
The first end of the 3rd resistor is connect with the output interface, and second end passes through the 4th resistance eutral grounding；
The first input end of the charge pump multiplication of voltage mode control module and the first end of divider resistance connect, the second input terminal
Connect with the second end of the 3rd resistor, the first output end is connect with the multiplication of voltage control interface, second output terminal with
Second input terminal of the clocked logic control module connects；
The second end of the divider resistance inputs the input voltage, and first end is grounded by another divider resistance.
5. control electrical appliances for electric charge pump according to claim 2, which is characterized in that the charge pump includes：
First pole of first switch pipe, the first switch pipe is connect with the input interface, and the second pole connects with first node
It connects；
First pole of second switch pipe, the second switch pipe is connect with the first node, and the second pole connects with the output
Mouth connection；
First pole of third switching tube, the third switching tube is connect with the input interface, and the second pole connects with second node
It connects；
First pole of the 4th switching tube, the 4th switching tube is connect with third node, and the second pole connects with the second node
It connects；
First pole of the 5th switching tube, the 5th switching tube is connect with the input interface, the second pole and the third section
Point connection；
First pole of the 6th switching tube, the 6th switching tube is connect with the third node, and the second pole connects with the output
Mouth connection；
First pole of the 7th switching tube, the 7th switching tube is connect with the input interface, and the second pole connects with fourth node
It connects；
First pole of the 8th switching tube, the 8th switching tube is connect with the second node, the second pole ground connection；
First pole of the 9th switching tube, the 9th switching tube is connect with the fourth node, the second pole ground connection；
First pump capacitance, a pole plate of the first pump capacitance connect the first node, another pole plate connection described the
Two nodes；
Second pump capacitance, a pole plate of the second pump capacitance connect the third node, another pole plate connection described the
Four nodes；
The control terminal of all switching tubes is all connected with the clock interface.
6. control electrical appliances for electric charge pump according to claim 5, which is characterized in that
The substrate of the first switch pipe is connect with the first node；
The substrate of the second switch pipe is connect with the output interface；
The substrate of the third switching tube is connect with the input interface；
The substrate of 4th switching tube is connect with the third node；
The substrate of 6th switching tube is connect with the output interface；
The substrate of 7th switching tube is connect with the input interface；
The Substrate ground of 8th switching tube；
The Substrate ground of 9th switching tube.
7. control electrical appliances for electric charge pump according to claim 5, which is characterized in that the charge pump further includes：2 tunnels select
Device, the control terminal input control voltage of No. 2 selector, first input end input the output voltage, the second input
End is connect with the third node, and output end is connect with the substrate of the 5th switching tube.
8. control electrical appliances for electric charge pump according to claim 7, which is characterized in that the charge pump works with 1.5 multiplication of voltages
Pattern and 2 multiplication of voltage operating modes；
When the charge pump is in 1.5 multiplication of voltage operating mode, the control voltage be low level, No. 2 selector it is defeated
Outlet exports the output voltage；
When the charge pump is in 2 multiplication of voltage operating mode, the control voltage is high level, the output of No. 2 selector
End exports the voltage of the third node.
9. control electrical appliances for electric charge pump according to claim 5, which is characterized in that the first switch pipe, described second open
Guan Guan, the third switching tube, the 4th switching tube, the 5th switching tube, the 6th switching tube and the described 7th
Switching tube is PMOS；
8th switching tube and the 9th switching tube are NMOS.
10. control electrical appliances for electric charge pump according to claim 3, which is characterized in that the of the clocked logic control module
Three input terminals are connect with oscillator.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107957770B (en) * | 2016-10-14 | 2023-03-24 | 国民技术股份有限公司 | Voltage stabilizer and terminal equipment |
| IT201700007428A1 (en) | 2017-01-24 | 2018-07-24 | St Microelectronics Srl | CORRESPONDENT LOADING PUMP CIRCUIT, DEVICE AND PROCEDURE |
| WO2018222903A1 (en) | 2017-05-31 | 2018-12-06 | Intuitive Surgical Operations, Inc. | Electrosurgical output stage with integrated dc regulator |
| CN108880233B (en) * | 2018-08-03 | 2023-10-24 | 上海艾为电子技术股份有限公司 | Charge pump circuit |
| CN111740588A (en) * | 2019-03-25 | 2020-10-02 | 罗富尧 | Built-in voltage multiplier in microcontroller unit of single battery remote controller for long distance infrared and low power consumption Bluetooth low energy transmission |
| CN113394968B (en) | 2020-03-12 | 2023-09-22 | 长鑫存储技术有限公司 | Charge pump circuit |
| CN111817553B (en) * | 2020-07-01 | 2021-12-24 | 浙江驰拓科技有限公司 | On-chip charge pump circuit |
| CN113672017B (en) * | 2021-08-06 | 2022-07-29 | 成都华微电子科技股份有限公司 | Self-adaptive mode switching charge pump |
| CN113965075B (en) * | 2021-10-26 | 2022-11-11 | 武汉市聚芯微电子有限责任公司 | Charge pump circuitry |
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| CN1866707A (en) * | 2005-05-17 | 2006-11-22 | 松下电器产业株式会社 | Charge pump type booster circuit and antenna switch |
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