CN105811746B - A kind of power supply transformed load fast response circuit and power supply changeover device - Google Patents
A kind of power supply transformed load fast response circuit and power supply changeover device Download PDFInfo
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- CN105811746B CN105811746B CN201610139236.2A CN201610139236A CN105811746B CN 105811746 B CN105811746 B CN 105811746B CN 201610139236 A CN201610139236 A CN 201610139236A CN 105811746 B CN105811746 B CN 105811746B
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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
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
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Abstract
The present invention is suitable for integrated circuit fields, provides a kind of power supply transformed load fast response circuit and power supply changeover device, which includes：Linear compensation unit, for according to the feedback signal of output loading generation the first control voltage；Error compensator, for error voltage generation the second control voltage generated according to feedback signal；Adder for the first control voltage and the second control voltage superposition generation the 3rd to be controlled voltage, is changed with quickly and stably responsive load and carries out voltage compensation；Error compensator is than the fast response time of linear compensation unit.The present invention increases an error compensator in voltage loop, as control signal feedback effect loop after linearity compensator is superimposed with two compensation rates of error compensator, the responding ability for improving load changing ensures that major loop is stablized simultaneously, and the circuit design is simple, area is small, at low cost.
Description
Technical field
The invention belongs to integrated circuit fields more particularly to a kind of power supply transformed load fast response circuit and power supply to convert
Device.
Background technology
Switch power converter is also known as exchange type power, switch converters, is a kind of high frequency device for converting electric energy, work(
It can be by the voltage of a level, the required voltage of user terminal or electric current are converted to through various forms of frameworks.
For switch power converter, an important parameter is exactly the response speed of output loading, especially in movement
Application field, the response speed for generally requiring output loading are higher.
However, the voltage loop of the prior art is fed back by linearity compensator, and the response speed of linearity compensator compares
Slowly, voltage conversioning rate is limited to the bandwidth and error amplifier of loop, it is impossible to respond different outputting inductances, electricity well
Hold, response speed is slow, and circuit cost of implementation is high, and chip occupying area is big.
The content of the invention
The embodiment of the present invention is designed to provide a kind of power supply transformed load fast response circuit, it is intended to solve existing electricity
The problem of power-switching circuit load current step low-response, circuit cost is high, and area is big.
The embodiment of the present invention is achieved in that a kind of power supply transformed load fast response circuit, and the circuit includes：
Linear compensation unit, for according to the feedback signal of output loading generation the first control voltage, the linear compensation
The feedback signal of the input terminal Rreceive output load of unit；
Error compensator, for error voltage generation the second control voltage generated according to the feedback signal, the mistake
The positive input of poor compensator connects the first reference voltage, the reverse input end of the error compensator and the linear compensation
The input terminal connection of unit；
Adder, for the described first control voltage and the second control voltage superposition generation the 3rd to be controlled voltage,
Changed with quickly and stably responsive load and carry out voltage compensation, the first input end of the adder and the linear compensation list
The output terminal connection of member, the second input terminal of the adder are connected with the output terminal of the error compensator, the adder
Output terminal output loading step voltage signal；
The error compensator is than the fast response time of the linear compensation unit.
The another object of the embodiment of the present invention is, provides a kind of including above-mentioned power supply transformed load fast response circuit
Power supply changeover device.
The embodiment of the present invention increases an error compensator in voltage loop, by linearity compensator and error compensator
As control signal feedback effect loop after two compensation rate superpositions, the responding ability for improving load changing ensures main ring simultaneously
Road is stablized, and control is done to the compensation rate of error voltage compensator by increasing control circuit can more precisely compensate for missing
Residual quantity obtains more suitable load changing response, and the circuit design is simple, and area is small, at low cost.
Description of the drawings
Fig. 1 is the structure chart of power supply transformed load fast response circuit provided in an embodiment of the present invention；
Fig. 2 is the example knot of linear compensating unit in power supply transformed load fast response circuit provided in an embodiment of the present invention
Composition；
Fig. 3 is the preferred structure figure of power supply transformed load fast response circuit provided in an embodiment of the present invention；
Fig. 4 is the one excellent of compensation rate control unit in power supply transformed load fast response circuit provided in an embodiment of the present invention
Select exemplary plot；
Fig. 5 is the another of compensation rate control unit in power supply transformed load fast response circuit provided in an embodiment of the present invention
Preferable example figure；
Fig. 6 is the exemplary circuit structure chart of compensation rate control unit provided in an embodiment of the present invention；
Fig. 7 is the compensated curve figure of the rapid loading response circuit of power supply provided in an embodiment of the present invention conversion；
Fig. 8 is the compensated curve after the adjusting of the rapid loading response circuit of power supply provided in an embodiment of the present invention conversion
Figure；
Fig. 9 shows the another exemplary circuit structure chart of compensation rate control unit provided in an embodiment of the present invention.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, it is right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.As long as in addition, technical characteristic involved in the various embodiments of the present invention described below
Conflict is not formed each other to can be combined with each other.
The embodiment of the present invention increases an error compensator in voltage loop, by linearity compensator and error compensator
As control signal feedback effect loop after two compensation rate superpositions, the responding ability for improving load changing ensures main ring simultaneously
Road stablizes that the circuit design is simple, and area is small, at low cost.
Fig. 1 shows the structure of power supply transformed load fast response circuit provided in an embodiment of the present invention, for the ease of saying
It is bright, it illustrates only and the relevant part of the utility model.
The power supply transformed load fast response circuit can be used cooperatively with power-switching circuit in various power supply changeover devices,
It is particularly suitable in high frequency switch power, which includes：
Linear compensation unit 100, for controlling voltage Vc0 according to the feedback signal of output loading generation first, so that it is right
Voltage loop carries out linear compensation, and to improve the stability of voltage loop, the input terminal Rreceive output of linear compensation unit 100 is born
The feedback signal Fb of load；
Error compensator 200, for the error voltage △ V generated according to feedback signalFBGeneration the second control voltage △ Vc,
Variation is loaded with quick response and carries out voltage compensation, the positive input of error compensator 200 connects the first reference voltage VREF1,
The reverse input end of error compensator 200 is connected with the input terminal of linear compensation unit 100；
Adder 300, for the first control voltage Vc0 and the second control voltage △ Vc superpositions generation the 3rd to be controlled voltage
Vc loads variation with quick response and carries out voltage compensation, and the first input end of adder 300 is defeated with linear compensation unit 100
Outlet connects, and the second input terminal of adder 300 is connected with the output terminal of error compensator 200, and the output terminal of adder 300 is defeated
Go out load current step voltage signal Vc.
Wherein error compensator 200 is than the fast response time of linear compensation unit 100.
In embodiments of the present invention, the response speed of linear compensation unit 100 is slow, is mainly responsible for the stabilization of voltage loop
Property, quickly, the response time is 1,000 times of 100 speed of linear compensation unit to the response speed of error compensator 200, works as output
Feedback signal Fb can generate an error voltage △ V on the basis of steady load when load changingFB, by error compensation
Device 200 generates △ Vc, and new control voltage Vc, error compensator when steady load are generated by the superposition of adder 300
200 outputs are 0.The compensated curve S1 that error compensator 200 exports is fixed referring to Fig. 7.
The embodiment of the present invention increases an error compensator in voltage loop, by linearity compensator and error compensator
As control signal feedback effect loop after two compensation rate superpositions, the responding ability for improving load changing ensures main ring simultaneously
Road is stablized, and the circuit design is simple, and area is small, at low cost.
Fig. 2 shows showing for linear compensating unit in power supply transformed load fast response circuit provided in an embodiment of the present invention
Example structure, wherein, linear compensation unit 100 can include：
First equivalent impedance module Z1 (S) 101, the input terminal of the first equivalent impedance module 101 is linear compensation unit 100
Input terminal；
Second equivalent impedance module Z2 (S) 102, the input terminal of the second equivalent impedance module 102 and the first equivalent impedance mould
The output terminal connection of block 101, the output terminal of the second equivalent impedance module 102 are the output terminal of linear compensation unit 100；
Amplifier unit 103, the reverse input end of amplifier unit 103 are connected with the output terminal of the first equivalent impedance module 101,
The positive input of amplifier unit 103 inputs the first reference voltage VREF1, the output terminal of amplifier unit 103 and the second equivalent impedance
The output terminal connection of module 102.
Specifically, the first equivalent impedance module Z1 (S) 101 and the second equivalent impedance module Z2 (S) 102 can be used certain
The resistance of ratio is realized.
In embodiments of the present invention, signal Fb is one of output loading voltage Vout partial pressure (feedback voltage), by the
Signal is scaled by impedance ratio equal proportion after one equivalent impedance module Z1 (S) 101 and the second equivalent impedance module Z2 (S) 102
Fb2,103 linearized amplified signal Fb2 of amplifier unit and the first reference voltage VREF1The margin of error, generate control signal Vc0, due to
Control signal Vc0 is converted by impedance, therefore response speed is slow, and generally at uS grades, therefore the embodiment of the present invention passes through
Increase error compensator 200 to improve response speed, make after linearity compensator is superimposed with two compensation rates of error compensator
For new control signal (Vc) feedback effect voltage loop, the responding ability for improving load changing ensures that major loop is steady simultaneously
It is fixed.
Due to adding error compensator 200 on voltage loop, a compensation loop is added, therefore in linear compensation list
Add compensation rate on the basis of member 100, and linear compensation unit 100 need not pass through impedance conversion can be directly in response to signal Fb
Variation, therefore response speed is faster, generally at nS grades, institute so as to change voltage loop control voltage Vc faster, so as to
Realize faster responsive load step.
Fig. 3 shows the structure for the power supply transformed load fast response circuit that one embodiment of the present invention provides, as
One embodiment of the invention, the rapid loading response circuit of power supply conversion can also include：
Compensation rate control unit 400, for controlling the compensation rate of error compensator 200, compensation rate control unit 400 it is defeated
Outlet is connected with the control terminal of error compensator 200.
The embodiment of the present invention is controlled by increasing compensation rate control unit come the compensation rate to error compensator, so as to
To be more accurately controlled the compensation margin of error, more suitable load changing response is obtained.
Curve S2 in Fig. 8 is to pass through the compensated curve after adjusting, it can be seen that the compensated curve S2 compensation rates after adjusting
It can program, be set as needed, adjust, change regulated quantity, control the time to load variation response.Obviously control is rung here
The time answered can become faster, can also be slack-off, greatly expand the scope of application of compensation.It can be to load when becoming faster
Variation responds rapidly to, and can be applied to require high application to step load variation；The load that can decay when slack-off when becomes
The response of change, amplification load current step variation.
As a kind of realization method, compensation rate control unit 400 can be current control module 401, pass through current control
The equivalent transconductance Gm of error compensation unit input pipe adjusts the compensation rate of error compensator 200, referring to Fig. 4.
As another realization method, compensation rate control unit 400 or output resistance control module 402 pass through
The equivalent output resistance Rout of error compensation unit is controlled to adjust the compensation rate of error compensator 200, referring to Fig. 5.
In embodiments of the present invention, since the compensation effect of compensation rate control unit 400 is determined by two parameters, that is, input
The equivalent transconductance Gm of pipe and equivalent output resistance Rout, therefore can be by adjusting the equivalent transconductance Gm or equivalent outputs of input pipe
Resistance Rout realizes the adjusting to compensation rate.
Fig. 6 shows the exemplary circuit structure of compensation rate control unit provided in an embodiment of the present invention, for convenience of description,
It illustrates only and the relevant part of the utility model.
As an embodiment of the present invention, which passes through current control errors compensating unit input pipe
Equivalent transconductance adjust the compensation rate of error compensator 200, including：
First error amplifier A1, first switch pipe M1, second switch pipe M2, the 3rd switching tube M3, resistance R0 and resistance
RBIAS；
The positive input of first error amplifier A1 connects the second reference voltage VREF2, the first error amplifier A1's is defeated
Outlet is connected with the control terminal of the 3rd switching tube M3, the input terminal of the 3rd switching tube M3 while the output terminal with first switch pipe M1
It is connected with the control terminal of first switch pipe M1, the input terminal of first switch pipe M1 is connected simultaneously with the input terminal of second switch pipe M2
Supply voltage, the control terminal of second switch pipe M2 are connected with the control terminal of first switch pipe M1, the output terminal of second switch pipe M2
For the output terminal of compensation rate control unit 400, the output terminal of the 3rd switching tube M3 is connected with one end of resistance R0, and resistance R0's is another
One end is connected with the reverse input end of the first error amplifier A1, and the other end of resistance R0 also passes through resistance RBIASGround connection.
Preferably, first, second, third switching tube M3 is p-type metal-oxide-semiconductor, the source electrode of p-type metal-oxide-semiconductor is first, second,
The input terminal of 3rd switching tube M3, p-type metal-oxide-semiconductor drain as the output terminal of first, second, third switching tube M3, p-type metal-oxide-semiconductor
Grid be first, second, third switching tube M3 control terminal.
In embodiments of the present invention, resistance RBIASOutside chip, it can be realized by connecing different resistance to control electricity
Flow IBIASProgramming, so as to obtain the different compensation rate of error compensator.
Fig. 9 shows another exemplary circuit structure of compensation rate control unit provided in an embodiment of the present invention, for the ease of
Illustrate, illustrate only and the relevant part of the utility model.
As an embodiment of the present invention, the compensation rate control unit 400 is by controlling the equivalent output of error compensation unit
Resistance adjusts the compensation rate of error compensator 200, including：
Second error amplifier A2 and switch arrays S1, S2 ... SN；
Wherein, resistance R1, R2 ... RN is the sub- equivalent resistance of equivalent output resistance Rout, the second error amplifier A2's
The positive input of the feedback signal Fb, the second error amplifier A2 of the load of reverse input end Rreceive output connect the 3rd benchmark electricity
Press VREF3, the output terminal of the second error amplifier A2 be connected simultaneously with the multiple input end of switch arrays S1, S2 ... SN, switch
The output terminal of array S1, S2 ... SN are grounded respectively by resistance R1, R2 ... RN.
In embodiments of the present invention, can be changed by controlling the control terminal of switch arrays S1, S2 ... SN equivalent defeated
Go out the size of resistance Rout.
The another object of the embodiment of the present invention is, provides a kind of including above-mentioned power supply transformed load fast response circuit
Power supply changeover device.
The embodiment of the present invention increases an error compensator in voltage loop, by linearity compensator and error compensator
As control signal feedback effect loop after two compensation rate superpositions, the responding ability for improving load changing ensures main ring simultaneously
Road is stablized, and control is done to the compensation rate of error voltage compensator by increasing control circuit can more precisely compensate for missing
Residual quantity obtains more suitable load changing response, and the circuit design is simple, and area is small, at low cost.
The foregoing is merely a prefered embodiment of the invention, is not intended to limit the invention, it is all the present invention spirit and
All any modification, equivalent and improvement made within principle etc., should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of power supply transformed load fast response circuit, which is characterized in that the circuit includes：
Linear compensation unit, for according to the feedback signal of output loading generation the first control voltage, the linear compensation unit
Input terminal Rreceive output load feedback signal；
Error compensator, for error voltage generation the second control voltage generated according to the feedback signal, the error is mended
The positive input for repaying device connects the first reference voltage, the reverse input end of the error compensator and the linear compensation unit
Input terminal connection；
Adder, for the described first control voltage and the second control voltage superposition generation the 3rd to be controlled voltage, with fast
Speed, steadily responsive load variation carry out voltage compensation, the first input end of the adder and the linear compensation unit
Output terminal connects, and the second input terminal of the adder is connected with the output terminal of the error compensator, the adder it is defeated
Outlet output loading step voltage signal；
The error compensator is than the fast response time of the linear compensation unit.
2. circuit as described in claim 1, which is characterized in that the linear compensation unit includes：
First equivalent impedance module, the input terminal of the first equivalent impedance module are the input terminal of the linear compensation unit；
Second equivalent impedance module, the input terminal of the second equivalent impedance module and the output of the first equivalent impedance module
End connection, the output terminal of the second equivalent impedance module are the output terminal of the linear compensation unit；
Amplifier unit, the reverse input end of the amplifier unit is connected with the output terminal of the first equivalent impedance module, described
The positive input of amplifier unit inputs the first reference voltage, the output terminal of the amplifier unit and the second equivalent impedance mould
The output terminal connection of block.
3. circuit as described in claim 1, which is characterized in that the circuit further includes：
Compensation rate control unit, for controlling the compensation rate of the error compensator, the output terminal of the compensation rate control unit
It is connected with the control terminal of the error compensation unit.
4. circuit as claimed in claim 3, which is characterized in that the compensation rate control unit passes through error described in current control
The equivalent transconductance of compensating unit input pipe adjusts the compensation rate of the error compensator.
5. circuit as claimed in claim 4, which is characterized in that the compensation rate control unit includes：
First error amplifier, first switch pipe, second switch pipe, the 3rd switching tube, resistance R0 and resistance RBIAS；
The positive input of first error amplifier connects the second reference voltage, the output terminal of first error amplifier
It is connected with the control terminal of the 3rd switching tube, the input terminal output with the first switch pipe simultaneously of the 3rd switching tube
End is connected with the control terminal of the first switch pipe, the input terminal of the input terminal of the first switch pipe and the second switch pipe
Supply voltage is connected simultaneously, the control terminal of the second switch pipe is connected with the control terminal of the first switch pipe, and described second
The output terminal of switching tube is the output terminal of the compensation rate control unit, the output terminal of the 3rd switching tube and the resistance R0
One end connection, the other end of the resistance R0 is connected with the reverse input end of first error amplifier, the resistance R0
The other end also pass through the resistance RBIASGround connection.
6. circuit as claimed in claim 5, which is characterized in that first, second, third switching tube is p-type metal-oxide-semiconductor,
The source electrode of the p-type metal-oxide-semiconductor is the input terminal of first, second, third switching tube, and the drain electrode of the p-type metal-oxide-semiconductor is described
The output terminal of first, second, third switching tube, the grid of the p-type metal-oxide-semiconductor are the control of first, second, third switching tube
End processed.
7. circuit as claimed in claim 3, which is characterized in that the compensation rate control unit is by controlling the error compensation
The equivalent output resistance of unit adjusts the compensation rate of the error compensator.
8. circuit as claimed in claim 7, which is characterized in that the compensation rate control unit includes：
Second error amplifier and switch arrays；
The feedback signal of the reverse input end Rreceive output load of second error amplifier, second error amplifier
Positive input connects the 3rd reference voltage, and the output terminal of second error amplifier is multiple with the switch arrays simultaneously
Input terminal connects, and the output terminal of the switch arrays is grounded respectively by resistance R1, R2 ... RN；
Wherein, resistance R1, R2 ... RN is the sub- equivalent resistance of equivalent output resistance Rout.
9. a kind of power supply changeover device, which is characterized in that the power supply changeover device includes such as claim 1 to 8 any one of them
Power supply transformed load fast response circuit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610139236.2A CN105811746B (en) | 2016-03-11 | 2016-03-11 | A kind of power supply transformed load fast response circuit and power supply changeover device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610139236.2A CN105811746B (en) | 2016-03-11 | 2016-03-11 | A kind of power supply transformed load fast response circuit and power supply changeover device |
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| Publication Number | Publication Date |
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| CN105811746A CN105811746A (en) | 2016-07-27 |
| CN105811746B true CN105811746B (en) | 2018-05-25 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102208912A (en) * | 2010-03-31 | 2011-10-05 | 上海摩波彼克半导体有限公司 | Analog-to-digital conversion non-linear error restoration circuit composition in integrated circuit and method thereof |
| CN102237797A (en) * | 2010-04-22 | 2011-11-09 | 英特赛尔美国股份有限公司 | System and method for detection and compensation of aggressive output filters for switched mode power supplies |
| CN104734469A (en) * | 2015-04-07 | 2015-06-24 | 南京矽力杰半导体技术有限公司 | Control circuit and switch type converter with same |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7538535B2 (en) * | 2006-01-13 | 2009-05-26 | Dell Products L.P. | Error voltage ripple compensation to extend bandwidth of a feedback loop in a DC-to-DC converter |
-
2016
- 2016-03-11 CN CN201610139236.2A patent/CN105811746B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102208912A (en) * | 2010-03-31 | 2011-10-05 | 上海摩波彼克半导体有限公司 | Analog-to-digital conversion non-linear error restoration circuit composition in integrated circuit and method thereof |
| CN102237797A (en) * | 2010-04-22 | 2011-11-09 | 英特赛尔美国股份有限公司 | System and method for detection and compensation of aggressive output filters for switched mode power supplies |
| CN104734469A (en) * | 2015-04-07 | 2015-06-24 | 南京矽力杰半导体技术有限公司 | Control circuit and switch type converter with same |
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