CN106817024A - Lift the buck power converter of transient response performance - Google Patents
Lift the buck power converter of transient response performance Download PDFInfo
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- CN106817024A CN106817024A CN201510864333.3A CN201510864333A CN106817024A CN 106817024 A CN106817024 A CN 106817024A CN 201510864333 A CN201510864333 A CN 201510864333A CN 106817024 A CN106817024 A CN 106817024A
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Abstract
The present invention relates to electronic technology field, and in particular to a kind of buck power converter.Lift the buck power converter of transient response performance, including, one operating circuit for being provided with energy-storage travelling wave tube, alternately switch between charge mode and discharge mode in a pulse width modulating signal or the lower control operating circuit of pulse frequency modulated signal effect, the output voltage for generation one less than input voltage；One control circuit, it is connected with operating circuit, it is used to produce pulse width modulating signal or pulse frequency modulated signal, control circuit includes an error amplifier, and error amplifier switches to change the size of error amplification signal in the presence of one second control signal between the first circuit topology with the first gain and the topology of the second circuit with the second gain.The present invention increases the gain of error amplifier in control circuit when load current increases suddenly so that output voltage can quick-recovery soon, to reduce the fluctuation of output voltage, lifting transient response, it is ensured that system steady operation.
Description
Technical field
The present invention relates to electronic technology field, and in particular to a kind of buck power converter.
Background technology
Power supply is the important component of electronic equipment, and the quality of its performance directly affects electronic equipment
Stability and reliability.Buck power converter is because circuit structure is simple, easy to adjust, reliability
High the advantages of, it is widely used always in buck occasion.Most buck power converter
Control is realized by way of pulse width modulation, that is, controls ON time and the pulse week of power switch pipe
The ratio between phase adjusts output voltage, as shown in figure 1, the output voltage Vout of buck power converter
Feedback voltage Vfb, feedback voltage Vfb is produced to amplify through error with a reference voltage V ref through backfeed loop
Output error amplifies signal, the current sample that error amplification signal is obtained with current sampling unit 3 after device 6
Signal compares through comparator 2, and comparative result is input into PWM modulator 1 to change power switch pipe
ON time, regulated output voltage；However, this buck power converter, when load change is drawn
It is defeated to change due to needing by voltage feedback loop and current feedback loop when playing output voltage change
The width for going out pulse could stablize buck power converter, and response speed is slower, and stability is poor.Fig. 2
In from top to bottom be respectively output voltage Vout and load current Iload oscillogram, can be seen by Fig. 2
Go out, when load current Iload increases suddenly, output voltage Vout fluctuation it is larger so that system it is steady
It is qualitative poor.
The content of the invention
It is an object of the present invention to provide a kind of buck power converter for lifting transient response performance,
Solve above technical problem；
Technical problem solved by the invention can be realized using following technical scheme：
The buck power converter of transient response performance is lifted, wherein, including,
One operating circuit for being provided with energy-storage travelling wave tube, adjusts in a pulse width modulating signal or a pulse frequency
Control the operating circuit alternately to switch between charge mode and discharge mode under signal function processed, be used for
Produce an output voltage for being less than input voltage；
One control circuit, is connected with the operating circuit, switchably to produce the pulse width to adjust
Signal processed or the pulse frequency modulated signal, the control circuit include an error amplifier, the mistake
Difference amplifier in the first circuit topology with the first gain and has in the presence of one second control signal
Switch to change the size of the error amplification signal of output between the second circuit topology of the second gain.
The buck power converter of above-mentioned lifting transient response performance, second control signal passes through
The control circuit is produced, and the control circuit produces second control when load current increases suddenly
Signal.
The buck power converter of above-mentioned lifting transient response performance, the error amplifier includes,
Operating voltage end, for being input into the operating voltage；
First input end, for connecting a reference voltage signal；
Second input, for connecting voltage feedback signal of the sampling from the output voltage；
Output end, for exporting the error amplification signal；
The differential amplifier circuit of a plurality of metal-oxide-semiconductors composition, be controllably connected to the operating voltage end,
Between the earth terminal, the first input end, second input and the output end, for right
The reference voltage signal and the voltage feedback signal carry out differential amplification and amplify letter to export the error
Number；
One second metal-oxide-semiconductor of two ends parallel connection of the predetermined metal-oxide-semiconductor, institute in the differential amplifier circuit
State and connect a switching branches, institute between the grid of the second metal-oxide-semiconductor and the grid of the predetermined metal-oxide-semiconductor
State switching branches to be turned on or off in the presence of second control signal, to realize the differential amplification
Circuit switches between first circuit topology and second circuit topology.
The buck power converter of above-mentioned lifting transient response performance, the differential amplifier circuit includes,
First PMOS, the source electrode connection one first of first PMOS crosses node, and described the
The drain electrode connection one second of one PMOS crosses node, and the grid connection of first PMOS is described
First input end；
Second PMOS, the source electrode connection described first of second PMOS crosses node, described
The drain electrode connection one the 3rd of the second PMOS crosses node, the grid connection institute of second PMOS
State the second input；
3rd PMOS, the grid of the 3rd PMOS connects one first bias voltage, and described the
The source electrode of three PMOSs connects the operating voltage end, and the drain electrode connection of the 3rd PMOS is described
First is crossed node, and the first bias current is provided in the presence of first bias voltage；
First NMOS tube, is connected to described second and crosses between node and power supply ground, and described first
The grid of NMOS tube connects one second bias voltage；
Second NMOS tube, is connected to the described 3rd and crosses between node and power supply ground, and described second
The grid of NMOS tube connects second bias voltage.
The buck power converter of above-mentioned lifting transient response performance, the differential amplifier circuit is also
Including,
5th NMOS tube, the source electrode connection described second of the 5th NMOS tube crosses node,
The drain electrode connection one the 4th of the 5th NMOS tube crosses node, and the described 4th grid for crossing node connects
Connect one the 3rd bias voltage；
6th NMOS tube, the source electrode connection the described 3rd of the 6th NMOS tube crosses node,
The drain electrode connection output end of the 6th NMOS tube, the grid connection of the 6th NMOS tube is described
3rd bias voltage；
7th NMOS tube and the 9th NMOS tube, are series at the described 4th and cross node and the work
Make between voltage end, the grid of the 7th NMOS tube connects the 4th bias voltage, the described 7th
The source electrode of NMOS tube connects the drain electrode of the 9th NMOS tube, the source electrode of the 9th NMOS tube
The operating voltage end is connected, the grid of the 9th NMOS tube connects one the 5th bias voltage；
8th NMOS tube and the tenth NMOS tube, are series at the output end and the operating voltage
Between end, the grid of the 8th NMOS tube connects the 4th bias voltage, the 8th NMOS
The source electrode of pipe connects the drain electrode of the tenth NMOS tube, the source electrode connection institute of the tenth NMOS tube
Operating voltage end is stated, the grid of the tenth NMOS tube connects the 5th bias voltage.
The buck power converter of above-mentioned lifting transient response performance, the differential amplifier circuit is also wrapped
One the 4th PMOS is included, is parallel between the source electrode of the 3rd PMOS and drain electrode, the described 4th
A first switch branch road is connected between the grid of the grid of PMOS and the 3rd PMOS, it is described
When first switch branch road is turned in the presence of second control signal, the 3rd PMOS and institute
The 4th PMOS synchronous working is stated, to change the size of first bias current.
The buck power converter of above-mentioned lifting transient response performance, the differential amplifier circuit is also wrapped
Include,
3rd NMOS tube, is parallel between the source electrode of first NMOS tube and drain electrode, and described the
A second switch branch road is connected between the grid of the grid of three NMOS tubes and first NMOS tube,
When the second switch branch road is turned in the presence of second control signal, the 3rd NMOS tube
Worked asynchronously with first NMOS tube；
4th NMOS tube, is parallel between the source electrode of second NMOS tube and drain electrode, and described the
One the 3rd switching branches are connected between the grid of the grid of four NMOS tubes and second NMOS tube,
When 3rd switching branches are turned in the presence of second control signal, the 4th NMOS tube
Worked asynchronously with second NMOS tube.
The buck power converter of above-mentioned lifting transient response performance, the control circuit includes,
One comparator, for being examined from the electric current of the operating circuit to the error amplification signal and a sampling
Survey signal to be compared, produce a comparison signal；
One clock unit, for producing clock signal；
One modulator, the modulator connects the clock signal and the comparison signal, according to the ratio
The pulse width modulating signal or the pulse frequency modulated is produced to believe compared with signal and the clock signal
Number.
The buck power converter of above-mentioned lifting transient response performance, the operating circuit includes,
One charge control branch road, is connected to an input and and crosses between node；
One discharge and recharge branch road, is connected to described crossing between node and the output end；
One control of discharge branch road, is connected to described crossing between node and an earth terminal；
The energy-storage travelling wave tube is series on the discharge and recharge branch road；
When charge mode, the charge control branch road and the discharge and recharge branch road are turned on the operating circuit,
The control of discharge branch road disconnects, and the electric current of the input input charges to the energy-storage travelling wave tube；
When discharge mode, the control of discharge branch road and the discharge and recharge branch road are turned on the operating circuit,
The charge control branch road disconnects, and the energy-storage travelling wave tube discharges the output end.
The buck power converter of above-mentioned lifting transient response performance, the current detection signal passes through
One current detection circuit is produced, and the current detection circuit includes,
One detection resistance, is series on the current detection circuit；
One current sampling unit, connects the two ends of the detection resistance, is used to detect and flows through the detection electricity
The electric current of resistance；
The one detection control that break-make is controlled by the pulse width modulating signal or the pulse frequency modulated signal
System switch, is connected on the current detection circuit.
Beneficial effect：Due to using above technical scheme, the present invention increases when load current increases suddenly
Plus in control circuit error amplifier gain so that output voltage can quick-recovery soon, to reduce output
The fluctuation of voltage, lifts transient response, it is ensured that system steady operation.
Brief description of the drawings
Fig. 1 is the circuit diagram of the buck power converter of prior art；
Fig. 2 is output end voltage Vout, the oscillogram of load current Iload of prior art；
Fig. 3 is the circuit diagram of the buck power converter of lifting transient response performance of the invention；
Fig. 4 is load current Iload of the invention, output voltage Vout, the second control signal
The oscillogram of the current signal Iea of Osc_on_delay and error amplifier；
Fig. 5 is a kind of structural representation of the error amplifier of physical circuit embodiment of the invention；
Fig. 6 is the first circuit topological structure schematic diagram of the error amplifier of Fig. 5；
Fig. 7 is the first switch branch road schematic diagram of Fig. 5 of the invention；
Fig. 8 is the second switch branch road schematic diagram of Fig. 5 of the invention；
Fig. 9 is the 3rd switching branches schematic diagram of Fig. 5 of the invention.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the invention, and
It is not all, of embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art are without work
The every other embodiment obtained on the premise of going out creative work, belongs to the scope of protection of the invention.
It should be noted that in the case where not conflicting, the embodiment in the present invention and the spy in embodiment
Levying to be mutually combined.
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings, but not as of the invention
Limit.
Reference picture 3, lifts the buck power converter of transient response performance, wherein, including,
One operating circuit for being provided with energy-storage travelling wave tube, adjusts in a pulse width modulating signal or a pulse frequency
Operating circuit is controlled alternately to switch between charge mode and discharge mode under signal function processed, for producing
The one output voltage Vout less than input voltage VDD；
One control circuit, be connected with operating circuit, to switchably produce pulse width modulating signal or
Pulse frequency modulated signal, control circuit includes an error amplifier 6a, and error amplifier 6a is in one the
In the first circuit topology with the first gain and with the presence of two control signal Osc_on_delay
Switch to change the size of error amplification signal EAout between the second circuit topology of two gains.
The control circuit of buck power converter can be divided into PWM (Pulse Width Modulation, arteries and veins
Rush width modulated) control mode, PFM (Pulse Frequency Modulation, pulse frequency modulated)
Three kinds of control mode and mixed-control mode, mixed-control mode in the case of heavy duty, using PWM
Control mode；Under light load conditions, PFM control modes are switched to, to ensure in whole loading range
Interior power converter all has conversion efficiency higher；Meanwhile, the Whole Response of buck power converter
Speed is heavily dependent on the reaction speed of error amplifier, and the present invention is by error amplifier 6a
Upper second the control signal Osc_on_delay, the second control signal Osc_on_delay that set is by controlling electricity
Road produces, and control circuit produces the second control signal Osc_on_delay when load current increases suddenly.
I.e. in buck power converter under low-load pattern, when load current increases suddenly, second is produced to control
Signal Osc_on_delay processed increases the increasing of error amplifier in control circuit with switching circuit topological structure
Benefit so that when load increases suddenly, output voltage can quick-recovery soon, the fluctuation of reduction output voltage,
Lifting transient response, it is ensured that system steady operation.A kind of preferred embodiment, the second above-mentioned control letter
When number Osc_on_delay is produced, buck power converter is converted to PWM from PFM control modes
Control mode.
The buck power converter of above-mentioned lifting transient response performance, reference picture 5, Fig. 6, error is put
Big device 6a can include,
Operating voltage end VDD, for input service voltage；
First input end Vin1, for connecting a reference voltage signal Vref；
Second input Vin2, for connecting voltage feedback signal Vfb of the sampling from output voltage Vout；
Output end EAout, signal EAout is amplified for output error；
The differential amplifier circuit of a plurality of metal-oxide-semiconductors composition, be controllably connected to operating voltage end VDD,
Between earth terminal, first input end Vin1, the second input Vin2 and output end EAout, for right
Reference voltage signal Vref and voltage feedback signal Vfb carry out differential amplification and amplify signal with output error；
One second metal-oxide-semiconductor of two ends parallel connection of predetermined metal-oxide-semiconductor, the 2nd MOS in differential amplifier circuit
A switching branches are connected between the grid of the grid of pipe and predetermined metal-oxide-semiconductor, switching branches are in the second control
It is turned on or off in the presence of signal Osc_on_delay processed, to realize differential amplifier circuit in the first circuit
Switch between topological sum second circuit topology.A kind of specific embodiment, when each switching branches disconnect, difference
Amplifying circuit is the first circuit topology, with the first gain；And when each switching branches are turned on, difference is put
Big circuit is second circuit topology, with the second gain, to realize control switching.
In a kind of preferred embodiment, the first circuit topology of differential amplifier circuit can include,
First PMOS M1, its source electrode connection one first crosses node A, its drain electrode connection one second
Cross nodes X, its grid connection first input end Vin1；
Second PMOS M2, its source electrode connection first is crossed node A, and its drain electrode connection one the 3rd is handed over
Sink nodes Y, its grid connects the second input Vin2；
3rd PMOS M11, its grid connects one first bias voltage Vb5, its source electrode connection work
Voltage end VDD, drain electrode connection first crosses node A, is carried in the presence of the first bias voltage Vb5
For the first bias current.
The buck power converter of above-mentioned lifting transient response performance, the first electricity of differential amplifier circuit
Road is topological also to be included,
First NMOS tube M5, is connected to second and crosses between nodes X and power supply ground GND, its
Grid connects one second bias voltage Vb4；
Second NMOS tube M6, is connected to the 3rd and crosses between node Y and power supply ground, and its grid connects
Meet the second bias voltage Vb4；
First NMOS tube M5 and the second NMOS tube M6 work in saturation region and are put with providing difference
The load of big circuit.
The buck power converter of above-mentioned lifting transient response performance, the first circuit topology also includes,
5th NMOS tube M3, its source electrode connection second is crossed nodes X, and its drain electrode connection the 4th is handed over
Sink nodes B, its grid connects the 3rd bias voltage Vb1；
6th NMOS tube M4, its source electrode connection the 3rd crosses node Y, its drain electrode connection output end
EAout, its grid connects the 3rd bias voltage Vb1；
7th NMOS tube M7 and the 9th NMOS tube M9, is series at the 4th and crosses node B and work
Make between voltage end VDD, the grid of the 7th NMOS tube M7 connects the 4th bias voltage Vb2, the
The source electrode of seven NMOS tube M7 connects the drain electrode of the 9th NMOS tube M9, the 9th NMOS tube M9
The grid of source electrode connection operating voltage end VDD, the 9th NMOS tube M9 connect the 5th bias voltage
Vb3；
8th NMOS tube M8 and the tenth NMOS tube M10, is series at output end EAout and work
Make between voltage end VDD, the grid of the 8th NMOS tube M8 connects the 4th bias voltage Vb2, the
The source electrode of eight NMOS tube M8 connects the drain electrode of the tenth NMOS tube M10, the tenth NMOS tube M10
The grid of source electrode connection operating voltage end VDD, the tenth NMOS tube M10 connect the 5th bias voltage
Vb3。
First topological structure of above-mentioned differential amplifier circuit as shown in fig. 6, wherein, a PMOS
Pipe M1 and the second PMOS M2 constitutes Differential Input pair, the 5th NMOS tube M3, the 6th NMOS
Pipe M4 and the first PMOS M1, the second PMOS M2 form input cascade pipe, the 9th
NMOS tube M9, the tenth NMOS tube M10 and the 7th NMOS tube M7, the 8th NMOS tube
M8 constitutes common-source common-gate current mirror and both-end Differential Input is converted into Single-end output.
In a kind of preferred embodiment, as shown in figure 5, the second circuit topology bag of differential amplifier circuit
The first circuit topology is included, also including one the 4th PMOS M12, the 3rd PMOS M11 is parallel to
Source electrode and drain electrode between, the grid of the 4th PMOS M12 and the grid of the 3rd PMOS M11
Between connect a first switch branch road, first switch branch road is in the work of the second control signal Osc_on_delay
During with lower conducting, the 4th PMOS M12 works asynchronously with the 3rd PMOS M11, to change
The size of one bias current.As shown in fig. 7, first switch branch road is in the second control signal Osc_on_delay
In the presence of when turning on, the bias voltage Vb6 and the 3rd of the grid connection of the 4th PMOS M12
The first bias voltage Vb5 connections of the grid connection of PMOS M11.
The second circuit topology of differential amplifier circuit can further include,
3rd NMOS tube M13, is parallel between the source electrode of the first NMOS tube M5 and drain electrode, the
A second switch branch is connected between the grid of the grid of three NMOS tube M13 and the first NMOS tube M5
Road, when second switch branch road is turned in the presence of the second control signal Osc_on_delay, the 3rd NMOS
Pipe M13 works asynchronously with the first NMOS tube M5；As shown in figure 8, second switch branch road is in second
When being turned in the presence of control signal Osc_on_delay, the grid connection of the 3rd NMOS tube M13
The second bias voltage Vb4 connections that bias voltage Vb7 is connected with the grid of the first NMOS tube M5, the
Three NMOS tubes work asynchronously with the first NMOS tube；
4th NMOS tube M14, is parallel between the source electrode of the second NMOS tube M6 and drain electrode, the
The switch of connection one the 3rd branch between the grid of the grid of four NMOS tube M14 and the second NMOS tube M6
Road, when the 3rd switching branches are turned in the presence of the second control signal Osc_on_delay, the 4th NMOS
Pipe M14 works asynchronously with the second NMOS tube M6.As shown in figure 9, the 3rd switching branches are in second
When being turned in the presence of control signal Osc_on_delay, the grid connection of the 4th NMOS tube M14
The second bias voltage Vb4 connections that bias voltage Vb8 is connected with the grid of the second NMOS tube M6.
Under second circuit is topological, the 4th PMOS M12, the 3rd NMOS tube M13 and the 4th
NMOS tube M14 is accessed simultaneously, to provide the second gain higher than the first gain.
The buck power converter of above-mentioned lifting transient response performance, controls circuit also to include,
One comparator 2, for being examined from the electric current of operating circuit to the samplings of error amplification signal EAout and
Survey signal to be compared, produce a comparison signal；
One clock unit 5, for producing clock signal；
One modulator 1a, modulator 1a connect clock signal and comparison signal, according to comparison signal, when
Clock signal produces pulse width modulating signal or pulse frequency modulated signal.
The buck power converter of above-mentioned lifting transient response performance, operating circuit includes,
One charge control branch road, is connected to an input VDD and and crosses between node Lx；
One discharge and recharge branch road, is connected to and crosses between node Lx and output end vo ut；
One control of discharge branch road, is connected to and crosses between node Lx and an earth terminal GND；
Energy-storage travelling wave tube L is series on discharge and recharge branch road；
When charge mode, charge control branch road and discharge and recharge branch road are turned on operating circuit, control of discharge branch
Road disconnects, and the electric current of input VDD inputs charges to energy-storage travelling wave tube L；
When discharge mode, control of discharge branch road and discharge and recharge branch road are turned on operating circuit, charge control branch
Road disconnects, and energy-storage travelling wave tube L discharges output end.
A kind of specific embodiment, a first switch pipe Mp is series on charge control branch road, and one second opens
Pipe Mn is closed, is series on control of discharge branch road；The source electrode connection input VDD of first switch pipe Mp,
Drain electrode connection crosses node Lx, the source electrode connection earth terminal GND of second switch pipe Mn, drain electrode connection
Cross node Lx, and the grid of first switch pipe Mp and second switch pipe Mn receives the control of modulator 1a
On or off processed.
The buck power converter of above-mentioned lifting transient response performance, current detection signal is by an electricity
Current detection circuit is produced, and current detection circuit includes,
One detection resistance Rb, is series on current detection circuit；
One current sampling unit 3, the two ends of connecting detection resistance Rb are used to detect and flow through detection resistance
Electric current；
The one detection controlling switch that break-make is controlled by pulse width modulating signal or pulse frequency modulated signal
Msen, is connected on current detection circuit.Current detection circuit can also using it is of the prior art other
Current detection circuit realizes that therefore not to repeat here.
Above-mentioned buck power converter also includes zero cross detection circuit 7, is connected with modulator 1a, its
Improvements of the invention are not belonging to, therefore not to repeat here.
The buck power converter of above-mentioned lifting transient response performance, voltage feedback signal Vfb passes through
One feedback network is produced, and feedback network is mainly formed by a resistor voltage divider circuit, and resistor voltage divider circuit includes
Predetermined number and the divider resistance between output end vo ut and earth terminal GND is connected in series with each other,
The point being connected between divider resistance forms divider node；Voltage feedback signal Vfb draws from divider node.
A kind of specific embodiment, voltage feedback signal Vfb goes here and there from an a first resistor R1 and second resistance R2
Join extraction in the feedback network for constituting.
The oscillogram of reference picture 4 can be seen that the oscillogram 2 compared to prior art, and the present invention can be in
Under PFM control models, one second control signal is produced when load current is mutated, make error amplifier certainly
The first circuit topology with the first gain is converted to the second circuit topology with the second gain, increases and misses
The electric current Iea of difference amplifier, allows output voltage Vout fast quick-recoveries in a short time, defeated to reduce
Go out the fluctuation of voltage Vout, lift transient response, it is ensured that system steady operation.
The foregoing is only preferred embodiments of the present invention, not thereby limit embodiments of the present invention and
Protection domain, to those skilled in the art, should can appreciate that all utilization description of the invention
And the equivalent done by diagramatic content and the scheme obtained by obvious change, should include
Within the scope of the present invention.
Claims (10)
1. the buck power converter of transient response performance is lifted, it is characterised in that including,
One operating circuit for being provided with energy-storage travelling wave tube, adjusts in a pulse width modulating signal or a pulse frequency
Control the operating circuit alternately to switch between charge mode and discharge mode under signal function processed, be used for
Produce an output voltage for being less than input voltage；
One control circuit, is connected with the operating circuit, switchably to produce the pulse width to adjust
Signal processed or the pulse frequency modulated signal, the control circuit include an error amplifier, the mistake
Difference amplifier in the first circuit topology with the first gain and has in the presence of one second control signal
Switch to change the size of the error amplification signal of output between the second circuit topology of the second gain.
2. the buck power converter of lifting transient response performance according to claim 1, it is special
Levy and be, second control signal is produced by the control circuit, and the control circuit is in load electricity
Stream produces second control signal when increasing suddenly.
3. the buck power converter of lifting transient response performance according to claim 1, it is special
Levy and be, the error amplifier includes,
Operating voltage end, for being input into the operating voltage；
First input end, for connecting a reference voltage signal；
Second input, for connecting voltage feedback signal of the sampling from the output voltage；
Output end, for exporting the error amplification signal；
The differential amplifier circuit of a plurality of metal-oxide-semiconductors composition, be controllably connected to the operating voltage end,
Between the earth terminal, the first input end, second input and the output end, for right
The reference voltage signal and the voltage feedback signal carry out differential amplification and amplify letter to export the error
Number；
One second metal-oxide-semiconductor of two ends parallel connection of the predetermined metal-oxide-semiconductor, institute in the differential amplifier circuit
State and connect a switching branches, institute between the grid of the second metal-oxide-semiconductor and the grid of the predetermined metal-oxide-semiconductor
State switching branches to be turned on or off in the presence of second control signal, to realize the differential amplification
Circuit switches between first circuit topology and second circuit topology.
4. the buck power converter of lifting transient response performance according to claim 3, it is special
Levy and be, the differential amplifier circuit includes,
First PMOS, the source electrode connection one first of first PMOS crosses node, and described the
The drain electrode connection one second of one PMOS crosses node, and the grid connection of first PMOS is described
First input end；
Second PMOS, the source electrode connection described first of second PMOS crosses node, described
The drain electrode connection one the 3rd of the second PMOS crosses node, the grid connection institute of second PMOS
State the second input；
3rd PMOS, the grid of the 3rd PMOS connects one first bias voltage, and described the
The source electrode of three PMOSs connects the operating voltage end, and the drain electrode connection of the 3rd PMOS is described
First is crossed node, and the first bias current is provided in the presence of first bias voltage；
First NMOS tube, is connected to described second and crosses between node and power supply ground, and described first
The grid of NMOS tube connects one second bias voltage；
Second NMOS tube, is connected to the described 3rd and crosses between node and power supply ground, and described second
The grid of NMOS tube connects second bias voltage.
5. it is according to claim 4 lifting transient response performance buck power converter, its
It is characterised by, the differential amplifier circuit also includes,
5th NMOS tube, the source electrode connection described second of the 5th NMOS tube crosses node,
The drain electrode connection one the 4th of the 5th NMOS tube crosses node, and the described 4th grid for crossing node connects
Connect one the 3rd bias voltage；
6th NMOS tube, the source electrode connection the described 3rd of the 6th NMOS tube crosses node,
The drain electrode connection output end of the 6th NMOS tube, the grid connection of the 6th NMOS tube is described
3rd bias voltage；
7th NMOS tube and the 9th NMOS tube, are series at the described 4th and cross node and the work
Make between voltage end, the grid of the 7th NMOS tube connects the 4th bias voltage, the described 7th
The source electrode of NMOS tube connects the drain electrode of the 9th NMOS tube, the source electrode of the 9th NMOS tube
The operating voltage end is connected, the grid of the 9th NMOS tube connects one the 5th bias voltage；
8th NMOS tube and the tenth NMOS tube, are series at the output end and the operating voltage
Between end, the grid of the 8th NMOS tube connects the 4th bias voltage, the 8th NMOS
The source electrode of pipe connects the drain electrode of the tenth NMOS tube, the source electrode connection institute of the tenth NMOS tube
Operating voltage end is stated, the grid of the tenth NMOS tube connects the 5th bias voltage.
6. the buck power converter of lifting transient response performance according to claim 4, it is special
Levy and be, the differential amplifier circuit also includes one the 4th PMOS, is parallel to the 3rd PMOS
Between the source electrode of pipe and drain electrode, the grid of the 4th PMOS and the grid of the 3rd PMOS
Between connect a first switch branch road, the first switch branch road is in the presence of second control signal
During conducting, the 3rd PMOS works asynchronously with the 4th PMOS, to change described first
The size of bias current.
7. the buck power converter of lifting transient response performance according to claim 6, it is special
Levy and be, the differential amplifier circuit also includes,
3rd NMOS tube, is parallel between the source electrode of first NMOS tube and drain electrode, and described the
A second switch branch road is connected between the grid of the grid of three NMOS tubes and first NMOS tube,
When the second switch branch road is turned in the presence of second control signal, the 3rd NMOS tube
Worked asynchronously with first NMOS tube；
4th NMOS tube, is parallel between the source electrode of second NMOS tube and drain electrode, and described the
One the 3rd switching branches are connected between the grid of the grid of four NMOS tubes and second NMOS tube,
When 3rd switching branches are turned in the presence of second control signal, the 4th NMOS tube
Worked asynchronously with second NMOS tube.
8. the buck power converter of lifting transient response performance according to claim 1, it is special
Levy and be, the control circuit includes,
One comparator, for being examined from the electric current of the operating circuit to the error amplification signal and a sampling
Survey signal to be compared, produce a comparison signal；
One clock unit, for producing clock signal；
One modulator, the modulator connects the clock signal and the comparison signal, according to the ratio
The pulse width modulating signal or the pulse frequency modulated is produced to believe compared with signal and the clock signal
Number.
9. the buck power converter of lifting transient response performance according to claim 1, it is special
Levy and be, the operating circuit includes,
One charge control branch road, is connected to an input and and crosses between node；
One discharge and recharge branch road, is connected to described crossing between node and the output end；
One control of discharge branch road, is connected to described crossing between node and an earth terminal；
The energy-storage travelling wave tube is series on the discharge and recharge branch road；
When charge mode, the charge control branch road and the discharge and recharge branch road are turned on the operating circuit,
The control of discharge branch road disconnects, and the electric current of the input input charges to the energy-storage travelling wave tube；
When discharge mode, the control of discharge branch road and the discharge and recharge branch road are turned on the operating circuit,
The charge control branch road disconnects, and the energy-storage travelling wave tube discharges the output end.
10. it is according to claim 8 lifting transient response performance buck power converter, its
It is characterised by, the current detection signal is produced by a current detection circuit, the current detection circuit
Including,
One detection resistance, is series on the current detection circuit；
One current sampling unit, connects the two ends of the detection resistance, is used to detect and flows through the detection electricity
The electric current of resistance；
The one detection control that break-make is controlled by the pulse width modulating signal or the pulse frequency modulated signal
System switch, is connected on the current detection circuit.
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| CN109687869A (en) * | 2018-12-26 | 2019-04-26 | 中国电子科技集团公司第五十八研究所 | Decompression voltage dividing bias circuit based on high-pressure and high-precision polycrystalline resistor in trap |
| CN112925378A (en) * | 2019-12-07 | 2021-06-08 | 原相科技股份有限公司 | Quick response linear voltage regulator and quick response amplifying circuit thereof |
| CN114242020A (en) * | 2022-02-22 | 2022-03-25 | 深圳通锐微电子技术有限公司 | Transient recovery circuit |
| CN114499128A (en) * | 2022-04-14 | 2022-05-13 | 深圳市思远半导体有限公司 | Conduction time state switching control circuit of synchronous tube and direct current converter |
| CN115603569A (en) * | 2021-07-08 | 2023-01-13 | 圣邦微电子（北京）股份有限公司（Cn） | Switch converter and control circuit thereof |
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| CN109687869A (en) * | 2018-12-26 | 2019-04-26 | 中国电子科技集团公司第五十八研究所 | Decompression voltage dividing bias circuit based on high-pressure and high-precision polycrystalline resistor in trap |
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| CN115882727A (en) * | 2023-02-10 | 2023-03-31 | 禹创半导体(深圳)有限公司 | Step-down converter and power chip |
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