CN106817024B - Promote the buck power converter of transient response performance - Google Patents
Promote the buck power converter of transient response performance Download PDFInfo
- Publication number
- CN106817024B CN106817024B CN201510864333.3A CN201510864333A CN106817024B CN 106817024 B CN106817024 B CN 106817024B CN 201510864333 A CN201510864333 A CN 201510864333A CN 106817024 B CN106817024 B CN 106817024B
- Authority
- CN
- China
- Prior art keywords
- nmos tube
- circuit
- signal
- grid
- tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Dc-Dc Converters (AREA)
- Amplifiers (AREA)
Abstract
The present invention relates to electronic technology fields, and in particular to a kind of buck power converter.Promote the buck power converter of transient response performance, including, one is provided with the operating circuit of energy-storage travelling wave tube, it acts on lower control operating circuit in a pulse width modulating signal or a pulse frequency modulated signal alternately to switch between charge mode and discharge mode, for generating an output voltage for being lower than input voltage；One control circuit, it is connect with operating circuit, to generate pulse width modulating signal or pulse frequency modulated signal, control circuit includes an error amplifier, and error amplifier switches between the first circuit topology with the first gain and the topology of the second circuit with the second gain under the action of a second control signal to change the size of error amplification signal.The present invention increases the gain of error amplifier in control circuit when load current increases suddenly, and the fast quick-recovery of output voltage is allowed to promote transient response, it is ensured that system steady operation to reduce the fluctuation of output voltage.
Description
Technical field
The present invention relates to electronic technology fields, and in particular to a kind of buck power converter.
Background technique
Power supply is the important component of electronic equipment, the superiority and inferiority of performance directly affect electronic equipment stability and
Reliability.Buck power converter is since circuit structure is simple, easy to adjust, high reliability, in buck occasion
It is widely used always.Most of buck power converter realizes control in such a way that pulse width is modulated, i.e.,
The ratio between turn-on time and pulse period of power switch tube is controlled to adjust output voltage, as shown in Figure 1, step down supplies are converted
The output voltage Vout of device generates feedback voltage Vfb through feedback loop, and feedback voltage Vfb is put with a reference voltage Vref through error
The current sampling signal that output error amplified signal after big device 6, error amplification signal and current sampling unit 3 obtain is through comparator
2 compare, and comparison result is input to the turn-on time for changing power switch tube after PWM modulator 1, stabilize the output voltage；However,
This buck power converter, when load variation causes output voltage to change, due to needing through voltage feedback loop and
Current feedback loop could stablize buck power converter to change the width of output pulse, and response speed is slower, stability
Difference.It is from top to bottom respectively the waveform diagram of output voltage Vout and load current Iload in Fig. 2, as seen from Figure 2, when negative
When load electric current Iload increases suddenly, output voltage Vout fluctuation is larger, so that the stability of system is poor.
Summary of the invention
The object of the present invention is to provide a kind of buck power converters for promoting transient response performance, more than solution
Technical problem；
Technical problem solved by the invention can be realized using following technical scheme:
Promote the buck power converter of transient response performance, wherein including,
One is provided with the operating circuit of energy-storage travelling wave tube, makees in a pulse width modulating signal or a pulse frequency modulated signal
Alternately switched between charge mode and discharge mode with the lower control operating circuit, for generating one lower than input voltage
Output voltage；
One control circuit is connect with the operating circuit, to switchably generate the pulse width modulating signal or
The pulse frequency modulated signal, the control circuit include an error amplifier, and the error amplifier is in one second control
Switch between the first circuit topology with the first gain and the topology of the second circuit with the second gain under the action of signal
To change the size of the error amplification signal of output.
The buck power converter of above-mentioned promotion transient response performance, the second control signal pass through the control
Circuit generates, and the control circuit generates the second control signal when load current increases suddenly.
The buck power converter of above-mentioned promotion transient response performance, the error amplifier include,
Operating voltage end, for inputting the operating voltage；
First input end, for connecting a reference voltage signal；
Second input terminal, 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-semiconductor compositions, is controllably connected to the operating voltage end, the ground connection
Between end, the first input end, second input terminal and the output end, for the reference voltage signal and described
Voltage feedback signal carries out differential amplification to export the error amplification signal；
The both ends of the scheduled metal-oxide-semiconductor one second metal-oxide-semiconductor in parallel, second metal-oxide-semiconductor in the differential amplifier circuit
Grid and the scheduled metal-oxide-semiconductor grid between connect a switching branches, the switching branches are in the second control letter
It is turned on or off under the action of number, to realize that the differential amplifier circuit is opened up in first circuit topology and the second circuit
Switch between flutterring.
The buck power converter of above-mentioned promotion transient response performance, the differential amplifier circuit include,
The source electrode connection one first of first PMOS tube, first PMOS tube crosses node, the leakage of first PMOS tube
Pole connection one second crosses node, and the grid of first PMOS tube connects the first input end；
The source electrode connection described first of second PMOS tube, second PMOS tube crosses node, second PMOS tube
Drain electrode one third of connection crosses node, and the grid of second PMOS tube connects second input terminal；
The grid of third PMOS tube, the third PMOS tube connects one first bias voltage, the source of the third PMOS tube
Pole connects the operating voltage end, and the drain electrode connection described first of the third PMOS tube crosses node, and Yu Suoshu first is biased
First bias current is provided under the action of voltage；
First NMOS tube is connected to described second and crosses between node and power ground, and the grid of first NMOS tube connects
Connect one second bias voltage；
Second NMOS tube is connected to the third and crosses between node and power ground, and the grid of second NMOS tube connects
Connect second bias voltage.
The buck power converter of above-mentioned promotion transient response performance, the differential amplifier circuit further include,
The source electrode connection described second of 5th NMOS tube, the 5th NMOS tube crosses node, the 5th NMOS tube
Drain electrode connection one the 4th crosses node, and the described 4th grid for crossing node connects a third bias voltage；
6th NMOS tube, the source electrode of the 6th NMOS tube connect the third and cross node, the 6th NMOS tube
Drain electrode connection output end, the grid of the 6th NMOS tube connect the third bias voltage；
7th NMOS tube and the 9th NMOS tube are series at the described 4th and cross between node and the operating voltage end, institute
The grid for stating the 7th NMOS tube connects the 4th bias voltage, and the source electrode of the 7th NMOS tube connects the 9th NMOS tube
Drain electrode, the source electrode of the 9th NMOS tube connects the operating voltage end, the grid connection one the 5th of the 9th NMOS tube
Bias voltage；
8th NMOS tube and the tenth NMOS tube are series between the output end and the operating voltage end, the described 8th
The grid of NMOS tube connects the 4th bias voltage, and the source electrode of the 8th NMOS tube connects the leakage of the tenth NMOS tube
Pole, the source electrode of the tenth NMOS tube connect the operating voltage end, and the grid connection the described 5th of the tenth NMOS tube is partially
Set voltage.
The buck power converter of above-mentioned promotion transient response performance, the differential amplifier circuit further includes one the 4th
PMOS tube is parallel between the source electrode and drain electrode of the third PMOS tube, the grid of the 4th PMOS tube and the third
A first switch branch is connected between the grid of PMOS tube, the first switch branch is under the action of the second control signal
When conducting, the third PMOS tube works asynchronously with the 4th PMOS tube, to change the size of first bias current.
The buck power converter of above-mentioned promotion transient response performance, the differential amplifier circuit further include,
Third NMOS tube is parallel between the source electrode and drain electrode of first NMOS tube, the grid of the third NMOS tube
A second switch branch is connected between the grid of first NMOS tube, the second switch branch is in the second control letter
When being connected under the action of number, the third NMOS tube works asynchronously with first NMOS tube；
4th NMOS tube is parallel between the source electrode and drain electrode of second NMOS tube, the grid of the 4th NMOS tube
A third switching branches are connected between the grid of second NMOS tube, the third switching branches are in the second control letter
When being connected under the action of number, the 4th NMOS tube works asynchronously with second NMOS tube.
The buck power converter of above-mentioned promotion transient response performance, the control circuit include,
One comparator, for the error amplification signal and a sampling from the current detection signal of the operating circuit into
Row compares, and generates a comparison signal；
One clock unit, for generating clock signal；
One modulator, the modulator connect the clock signal and the comparison signal, according to the comparison signal and
The clock signal generates the pulse width modulating signal or the pulse frequency modulated signal.
The buck power converter of above-mentioned promotion transient response performance, the operating circuit include,
One charge control branch is connected to an input terminal and one and crosses between node；
One charge and discharge branch is connected to described cross between node and the output end；
One control of discharge branch is connected to described cross between node and a ground terminal；
The energy-storage travelling wave tube is series at the charge and discharge branch road；
The operating circuit is when charge mode, and the charge control branch and charge and discharge branch conducting are described to put
Electric control branch disconnects, and the electric current of the input terminal input charges to the energy-storage travelling wave tube；
The operating circuit is when discharge mode, and the control of discharge branch and charge and discharge branch conducting are described to fill
Electric control branch disconnects, and the energy-storage travelling wave tube discharges to the output end.
The buck power converter of above-mentioned promotion transient response performance, the current detection signal are examined by an electric current
Slowdown monitoring circuit generates, and the current detection circuit includes,
One detection resistance is series on the current detection circuit；
One current sampling unit connects the both ends of the detection resistance, to detect the electric current for flowing through the detection resistance；
One is controlled the detection control switch of on-off by the pulse width modulating signal or the pulse frequency modulated signal,
It is connected on the current detection circuit.
The utility model has the advantages that due to using the technology described above, the present invention increases control circuit when load current increases suddenly
The gain of middle error amplifier allows the fast quick-recovery of output voltage, to reduce the fluctuation of output voltage, promote transient state and ring
It answers, it is ensured that system steady operation.
Detailed description of the invention
Fig. 1 is the circuit diagram of the buck power converter of the prior art；
Fig. 2 is the waveform diagram of the output end voltage Vout of the prior art, load current Iload；
Fig. 3 is the circuit diagram of the buck power converter of promotion transient response performance of the invention；
Fig. 4 is load current Iload of the invention, output voltage Vout, second control signal Osc_on_delay and mistake
The waveform diagram of the current signal Iea of poor amplifier；
Fig. 5 is a kind of structural schematic diagram 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 schematic diagram of Fig. 5 of the invention；
Fig. 8 is the second switch branch schematic diagram of Fig. 5 of the invention；
Fig. 9 is the third switching branches schematic diagram of Fig. 5 of the invention.
Specific embodiment
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 description, 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, those of ordinary skill in the art without creative labor it is obtained it is all its
His embodiment, shall fall within the protection scope of the present invention.
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
The present invention will be further explained below with reference to the attached drawings and specific examples, but not as the limitation of the invention.
Referring to Fig. 3, the buck power converter of transient response performance is promoted, wherein including,
One is provided with the operating circuit of energy-storage travelling wave tube, makees in a pulse width modulating signal or a pulse frequency modulated signal
Alternately switched between charge mode and discharge mode with lower control operating circuit, for generating one lower than input voltage VDD's
Output voltage Vout；
One control circuit, connect with operating circuit, switchably to generate pulse width modulating signal or pulse frequency
Modulated signal, control circuit include an error amplifier 6a, and error amplifier 6a is in a second control signal Osc_on_delay
Under the action of in the first circuit topology with the first gain and the second circuit with the second gain topology between switching to change
Become the size of error amplification signal EAout.
The control circuit of buck power converter can be divided into PWM (Pulse Width Modulation, pulse width tune
System) control mode, PFM (Pulse Frequency Modulation, pulse frequency modulated) control mode and mixing controlling party
Three kinds of formula, mixed-control mode is in heavy duty, using PWM control mode；Under light load conditions, it is switched to PFM control
Mode processed, to guarantee in entire loading range interior power converter transfer efficiency all with higher；Meanwhile step down supplies turn
The Whole Response speed of parallel operation is heavily dependent on the reaction speed of error amplifier, and the present invention passes through in error amplifier
Second control signal Osc_on_delay is set on 6a, and second control signal Osc_on_delay is generated by control circuit, control
Circuit processed generates second control signal Osc_on_delay when load current increases suddenly.Exist in buck power converter
Under low-load mode, when load current increases suddenly, second control signal Osc_on_delay is generated with switching circuit topology knot
Structure, increase control circuit in error amplifier gain so that load suddenly increase when, output voltage can fast quick-recovery, subtract
The fluctuation of small output voltage promotes transient response, it is ensured that system steady operation.A kind of preferred embodiment, the second above-mentioned control
Signal Osc_on_delay processed generate when, buck power converter from PFM control mode conversion be PWM control mode.
The buck power converter of above-mentioned promotion transient response performance, referring to Fig. 5, Fig. 6, error amplifier 6a can be with
Including,
Operating voltage end VDD is used for input service voltage；
First input end Vin1, for connecting a reference voltage signal Vref；
Second input terminal Vin2, for connecting voltage feedback signal Vfb of the sampling from output voltage Vout；
Output end EAout is used for output error amplified signal EAout；
The differential amplifier circuit of a plurality of metal-oxide-semiconductor compositions, is controllably connected to operating voltage end VDD, ground terminal, first
Between input terminal Vin1, the second input terminal Vin2 and output end EAout, for believing reference voltage signal Vref and Voltage Feedback
Number Vfb carries out differential amplification with output error amplified signal；
The both ends of scheduled metal-oxide-semiconductor one second metal-oxide-semiconductor in parallel in differential amplifier circuit, the grid of the second metal-oxide-semiconductor and predetermined
Metal-oxide-semiconductor grid between connect a switching branches, switching branches are led under the action of second control signal Osc_on_delay
On-off is opened, and is switched with realizing differential amplifier circuit between the first circuit topology and second circuit topology.A kind of specific implementation
Example, when each switching branches disconnect, differential amplifier circuit is the first circuit topology, has the first gain；And when each switching branches are led
When logical, differential amplifier circuit is second circuit topology, has the second gain, to realize control switching.
In a kind of preferred embodiment, the first circuit topology of differential amplifier circuit may include,
First PMOS tube M1, source electrode connection one first cross node A, and drain electrode connection one second crosses nodes X, grid
Pole connects first input end Vin1；
Second PMOS tube M2, source electrode connection first cross node A, and drain electrode one third of connection crosses node Y, grid
Connect the second input terminal Vin2；
Third PMOS tube M11, grid connect one first bias voltage Vb5, and source electrode connects operating voltage end VDD, leakage
Pole connection first crosses node A, provides the first bias current under the action of the first bias voltage Vb5.
The buck power converter of above-mentioned promotion transient response performance, the first circuit topology of differential amplifier circuit is also
Including,
First NMOS tube M5 is connected to second and crosses between nodes X and power ground GND, one second biasing of grid connection
Voltage Vb4；
Second NMOS tube M6 is connected to third and crosses between node Y and power ground, and grid connects the second bias voltage
Vb4；
First NMOS tube M5 and the second NMOS tube M6 works in saturation region to provide the load of differential amplifier circuit.
The buck power converter of above-mentioned promotion transient response performance, the first circuit topology further include,
5th NMOS tube M3, source electrode connection second cross nodes X, and drain electrode connection the 4th crosses node B, and grid connects
Meet third bias voltage Vb1；
6th NMOS tube M4, source electrode connection third cross node Y, drain electrode connection output end EAout, grid connection
Third bias voltage Vb1；
7th NMOS tube M7 and the 9th NMOS tube M9 is series at the 4th and crosses between node B and operating voltage end VDD, the
The grid of seven NMOS tube M7 connects the 4th bias voltage Vb2, and the source electrode of the 7th NMOS tube M7 connects the drain electrode of the 9th NMOS tube M9,
The source electrode of 9th NMOS tube M9 connects operating voltage end VDD, and the grid of the 9th NMOS tube M9 connects the 5th bias voltage Vb3；
8th NMOS tube M8 and the tenth NMOS tube M10 is series between output end EAout and operating voltage end VDD, the 8th
The grid of NMOS tube M8 connects the 4th bias voltage Vb2, and the source electrode of the 8th NMOS tube M8 connects the drain electrode of the tenth NMOS tube M10,
The source electrode of tenth NMOS tube M10 connects operating voltage end VDD, and the grid of the tenth NMOS tube M10 connects the 5th bias voltage Vb3.
First topological structure of above-mentioned differential amplifier circuit is as shown in Figure 6, wherein the first PMOS tube M1 and the 2nd PMOS
Pipe M2 constitutes Differential Input pair, and the 5th NMOS tube M3, the 6th NMOS tube M4 form defeated with the first PMOS tube M1, the second PMOS tube M2
Enter cascade pipe, it is total that the 9th NMOS tube M9, the tenth NMOS tube M10 and the 7th NMOS tube M7, the 8th NMOS tube M8 constitute common source
Both-end Differential Input is converted to Single-end output by cascode current mirror.
In a kind of preferred embodiment, as shown in figure 5, the second circuit topology of differential amplifier circuit includes the first circuit
Topology further includes one the 4th PMOS tube M12, is parallel between the source electrode and drain electrode of third PMOS tube M11, the 4th PMOS tube M12
Grid and third PMOS tube M11 grid between connect a first switch branch, first switch branch is in second control signal
When being connected under the action of Osc_on_delay, the 4th PMOS tube M12 works asynchronously with third PMOS tube M11, to change first partially
Set the size of electric current.As shown in fig. 7, when first switch branch is connected under the action of second control signal Osc_on_delay,
The first bias voltage that the bias voltage Vb6 of the grid connection of 4th PMOS tube M12 is connect with the grid of third PMOS tube M11
Vb5 connection.
The second circuit topology of differential amplifier circuit can further include,
Third NMOS tube M13 is parallel between the source electrode and drain electrode of the first NMOS tube M5, the grid of third NMOS tube M13
A second switch branch is connected between the grid of the first NMOS tube M5, second switch branch is in second control signal Osc_on_
When being connected under the action of delay, third NMOS tube M13 works asynchronously with the first NMOS tube M5；As shown in figure 8, second switch branch
When road is connected under the action of second control signal Osc_on_delay, the bias voltage of the grid connection of third NMOS tube M13
The second bias voltage Vb4 connection that Vb7 is connect with the grid of the first NMOS tube M5, third NMOS tube work synchronous with the first NMOS tube
Make；
4th NMOS tube M14 is parallel between the source electrode and drain electrode of the second NMOS tube M6, the grid of the 4th NMOS tube M14
A third switching branches are connected between the grid of the second NMOS tube M6, third switching branches are in second control signal Osc_on_
When being connected under the action of delay, the 4th NMOS tube M14 works asynchronously with the second NMOS tube M6.As shown in figure 9, third switch branch
When road is connected under the action of second control signal Osc_on_delay, the bias voltage of the grid connection of the 4th NMOS tube M14
The second bias voltage Vb4 connection that Vb8 is connect with the grid of the second NMOS tube M6.
Under second circuit topology, the 4th PMOS tube M12, third NMOS tube M13 and the 4th NMOS tube M14 are accessed simultaneously,
To provide the second gain for being higher than the first gain.
The buck power converter of above-mentioned promotion transient response performance, control circuit further include,
One comparator 2, for being carried out to the sampling of error amplification signal EAout and one from the current detection signal of operating circuit
Compare, generates a comparison signal；
One clock unit 5, for generating clock signal；
One modulator 1a, modulator 1a connection clock signal and comparison signal generate arteries and veins according to comparison signal, clock signal
Rush bandwidth modulation signals or pulse frequency modulated signal.
The buck power converter of above-mentioned promotion transient response performance, operating circuit include,
One charge control branch is connected to an input terminal VDD and one and crosses between node Lx；
One charge and discharge branch, is connected to and crosses between node Lx and output end vo ut；
One control of discharge branch is connected to and crosses between node Lx and a ground terminal GND；
Energy-storage travelling wave tube L is series at charge and discharge branch road；
When charge mode, charge control branch and the conducting of charge and discharge branch, control of discharge branch disconnects operating circuit, defeated
The electric current for entering to hold VDD to input charges to energy-storage travelling wave tube L；
When discharge mode, control of discharge branch and the conducting of charge and discharge branch, charge control branch disconnect operating circuit, storage
Energy element L discharges to output end.
A kind of specific embodiment, a first switch tube Mp are series at charge control branch road, a second switch Mn, series connection
In control of discharge branch road；The source electrode of first switch tube Mp connects input terminal VDD, and drain electrode connects the node Lx that crosses, second switch
The source electrode of pipe Mn connects ground terminal GND, and the grid that drain electrode connects cross node Lx, first switch tube Mp and second switch Mn connects
By the control on or off of modulator 1a.
The buck power converter of above-mentioned promotion transient response performance, current detection signal pass through current detecting electricity
Road generates, and current detection circuit includes,
One detection resistance Rb, is series on current detection circuit；
One current sampling unit 3, the both ends of connecting detection resistance Rb, to detect the electric current for flowing through detection resistance；
One is controlled the detection control switch Msen of on-off by pulse width modulating signal or pulse frequency modulated signal, connection
In on current detection circuit.Current detection circuit can also be using other current detection circuits in the prior art realization, herein
It does not repeat.
Above-mentioned buck power converter further includes zero cross detection circuit 7, connect with modulator 1a, is not belonging to this hair
Bright improvements, therefore not to repeat here.
The buck power converter of above-mentioned promotion transient response performance, voltage feedback signal Vfb pass through a feedback net
Network generates, and feedback network is mainly formed by a resistor voltage divider circuit, and resistor voltage divider circuit includes predetermined number and is serially connected ground
The divider resistance being connected between output end vo ut and ground terminal GND, the dot being connected between divider resistance is at divider node；Electricity
Feedback signal Vfb is pressed to draw from divider node.A kind of specific embodiment, voltage feedback signal Vfb is from a first resistor R1 and one
It is drawn in feedback network second resistance R2 in series.
It can be seen that waveform diagram 2 compared with the prior art referring to the waveform diagram of Fig. 4, the present invention can be in PFM control model
Under, a second control signal is generated in load current mutation, error amplifier is made certainly to there is the first circuit of the first gain to open up
It flutters and is converted to the second circuit topology with the second gain, increase the electric current Iea of error amplifier, make output voltage Vout can be with
Fast quick-recovery in a short time promotes transient response, it is ensured that system steady operation to reduce the fluctuation of output voltage Vout.
The foregoing is merely preferred embodiments of the present invention, are not intended to limit embodiments of the present invention and protection model
It encloses, to those skilled in the art, should can appreciate that all with made by description of the invention and diagramatic content
Equivalent replacement and obviously change obtained scheme, should all be included within the scope of the present invention.
Claims (9)
1. promoting the buck power converter of transient response performance, which is characterized in that including,
One is provided with the operating circuit of energy-storage travelling wave tube, under a pulse width modulating signal or pulse frequency modulated signal effect
It controls the operating circuit alternately to switch between charge mode and discharge mode, for generating the output for being lower than input voltage
Voltage；
One control circuit is connect with the operating circuit, switchably to generate the pulse width modulating signal or described
Pulse frequency modulated signal, the control circuit include an error amplifier, and the error amplifier is in a second control signal
Under the action of in the first circuit topology with the first gain and the second circuit with the second gain topology between switching to change
Become the size of the error amplification signal of output；
The error amplifier includes,
Operating voltage end, for inputting the operating voltage；
First input end, for connecting a reference voltage signal；
Second input terminal, 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 is controllably connected to the operating voltage end, ground terminal, described the
Between one input terminal, second input terminal and the output end, for the reference voltage signal and the Voltage Feedback
Signal carries out differential amplification to export the error amplification signal；
The both ends of scheduled metal-oxide-semiconductor one second metal-oxide-semiconductor in parallel in the differential amplifier circuit, the grid of second metal-oxide-semiconductor with
A switching branches are connected between the grid of the scheduled metal-oxide-semiconductor, the switching branches are in the effect of the second control signal
Under be turned on or off, with realize the differential amplifier circuit in first circuit topology and the second circuit topology between cut
It changes.
2. the buck power converter according to claim 1 for promoting transient response performance, which is characterized in that described the
Two control signals are generated by the control circuit, and the control circuit generates second control when load current increases suddenly
Signal processed.
3. the buck power converter according to claim 1 for promoting transient response performance, which is characterized in that the difference
Point amplifying circuit includes,
The source electrode connection one first of first PMOS tube, first PMOS tube crosses node, and the drain electrode of first PMOS tube connects
It connects one second to cross node, the grid of first PMOS tube connects the first input end；
The source electrode connection described first of second PMOS tube, second PMOS tube crosses node, the drain electrode of second PMOS tube
It connects a third to cross node, the grid of second PMOS tube connects second input terminal；
Third PMOS tube, the grid of the third PMOS tube connect one first bias voltage, and the source electrode of the third PMOS tube connects
Connect the operating voltage end, the drain electrode connection described first of the third PMOS tube crosses node, the first bias voltage of Yu Suoshu
Under the action of the first bias current is provided；
First NMOS tube is connected to described second and crosses between node and power ground, the grid connection one of first NMOS tube
Second bias voltage；
Second NMOS tube is connected to the third and crosses between node and power ground, and the grid of second NMOS tube connects institute
State the second bias voltage.
4. the buck power converter according to claim 3 for promoting transient response performance, which is characterized in that the difference
Point amplifying circuit further includes,
The source electrode connection described second of 5th NMOS tube, the 5th NMOS tube crosses node, the drain electrode of the 5th NMOS tube
It connects one the 4th to cross node, the grid of the 5th NMOS tube connects a third bias voltage；
6th NMOS tube, the source electrode of the 6th NMOS tube connect the third and cross node, the drain electrode of the 6th NMOS tube
Output end is connected, the grid of the 6th NMOS tube connects the third bias voltage；
7th NMOS tube and the 9th NMOS tube are series at the described 4th and cross between node and the operating voltage end, and described
The grid of seven NMOS tubes connects the 4th bias voltage, and the source electrode of the 7th NMOS tube connects the drain electrode of the 9th NMOS tube,
The source electrode of 9th NMOS tube connects the operating voltage end, and the grid of the 9th NMOS tube connects one the 5th biased electrical
Pressure；
8th NMOS tube and the tenth NMOS tube are series between the output end and the operating voltage end, the 8th NMOS
The grid of pipe connects the 4th bias voltage, and the source electrode of the 8th NMOS tube connects the drain electrode of the tenth NMOS tube, institute
The source electrode for stating the tenth NMOS tube connects the operating voltage end, and the grid of the tenth NMOS tube connects the 5th biased electrical
Pressure.
5. the buck power converter according to claim 3 for promoting transient response performance, which is characterized in that the difference
Dividing amplifying circuit further includes one the 4th PMOS tube, is parallel between the source electrode and drain electrode of the third PMOS tube, the described 4th
A first switch branch is connected between the grid of PMOS tube and the grid of the third PMOS tube, the first switch branch is in institute
It states when being connected under the action of second control signal, the third PMOS tube works asynchronously with the 4th PMOS tube, to change
State the size of the first bias current.
6. the buck power converter according to claim 5 for promoting transient response performance, which is characterized in that the difference
Point amplifying circuit further includes,
Third NMOS tube is parallel between the source electrode and drain electrode of first NMOS tube, the grid of the third NMOS tube and institute
It states and connects a second switch branch between the grid of the first NMOS tube, the second switch branch is in the second control signal
Under effect when conducting, the third NMOS tube works asynchronously with first NMOS tube；
4th NMOS tube is parallel between the source electrode and drain electrode of second NMOS tube, the grid of the 4th NMOS tube and institute
It states and connects a third switching branches between the grid of the second NMOS tube, the third switching branches are in the second control signal
Under effect when conducting, the 4th NMOS tube works asynchronously with second NMOS tube.
7. the buck power converter according to claim 1 for promoting transient response performance, which is characterized in that the control
Circuit processed includes,
One comparator, for comparing from the current detection signal of the operating circuit with a sampling the error amplification signal
Compared with one comparison signal of generation；
One clock unit, for generating clock signal；
One modulator, the modulator connect the clock signal and the comparison signal, according to the comparison signal and described
Clock signal generates the pulse width modulating signal or the pulse frequency modulated signal.
8. the buck power converter according to claim 1 for promoting transient response performance, which is characterized in that the work
Include as circuit,
One charge control branch is connected to an input terminal and one and crosses between node；
One charge and discharge branch is connected to described cross between node and the output end of the buck power converter；
One control of discharge branch is connected to described cross between node and a ground terminal；
The energy-storage travelling wave tube is series at the charge and discharge branch road；
The operating circuit is when charge mode, the charge control branch and charge and discharge branch conducting, the electric discharge control
Branch processed disconnects, and the electric current of the input terminal input charges to the energy-storage travelling wave tube；
The operating circuit is when discharge mode, the control of discharge branch and charge and discharge branch conducting, the charging control
Branch processed disconnects, and the energy-storage travelling wave tube discharges to the output end of the buck power converter.
9. the buck power converter according to claim 7 for promoting transient response performance, which is characterized in that the electricity
By current detection circuit generation, the current detection circuit includes stream detection signal,
One detection resistance is series on the current detection circuit；
One current sampling unit connects the both ends of the detection resistance, to detect the electric current for flowing through the detection resistance；
One is controlled the detection control switch of on-off by the pulse width modulating signal or the pulse frequency modulated signal, connection
In on the current detection circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510864333.3A CN106817024B (en) | 2015-11-30 | 2015-11-30 | Promote the buck power converter of transient response performance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510864333.3A CN106817024B (en) | 2015-11-30 | 2015-11-30 | Promote the buck power converter of transient response performance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106817024A CN106817024A (en) | 2017-06-09 |
| CN106817024B true CN106817024B (en) | 2019-05-24 |
Family
ID=59107179
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510864333.3A Active CN106817024B (en) | 2015-11-30 | 2015-11-30 | Promote the buck power converter of transient response performance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106817024B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109687869B (en) * | 2018-12-26 | 2022-08-16 | 中国电子科技集团公司第五十八研究所 | Voltage reduction and voltage division biasing circuit based on high-voltage and high-precision polycrystalline resistor in trap |
| US10996700B1 (en) * | 2019-12-07 | 2021-05-04 | Pixart Imaging Incorporation | Fast response linear regulator with bias current control and overshoot and undershoot suppression |
| CN115603569B (en) * | 2021-07-08 | 2024-11-01 | 圣邦微电子（北京）股份有限公司 | Switching converter and its control circuit |
| CN114242020B (en) * | 2022-02-22 | 2022-06-10 | 深圳通锐微电子技术有限公司 | Transient recovery circuit |
| CN114499128B (en) * | 2022-04-14 | 2022-07-22 | 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 |
| 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 |
| CN117879348B (en) * | 2023-04-26 | 2024-06-11 | 杭州顺元微电子有限公司 | Step-down DCDC converter |
| CN119276226B (en) * | 2024-12-06 | 2025-04-04 | 上海芯享程半导体有限公司 | A BUCK converter and a variable gain error amplifier circuit |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101520667A (en) * | 2008-02-26 | 2009-09-02 | 瑞昱半导体股份有限公司 | Linear voltage stabilizer and voltage stabilizing method |
| CN102025277A (en) * | 2009-09-17 | 2011-04-20 | 凌力尔特有限公司 | Improved feedback control of a dc/dc power converter |
| CN104753345A (en) * | 2013-12-30 | 2015-07-01 | 展讯通信（上海）有限公司 | Technology for improving transient response of BUCK circuit |
-
2015
- 2015-11-30 CN CN201510864333.3A patent/CN106817024B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101520667A (en) * | 2008-02-26 | 2009-09-02 | 瑞昱半导体股份有限公司 | Linear voltage stabilizer and voltage stabilizing method |
| CN102025277A (en) * | 2009-09-17 | 2011-04-20 | 凌力尔特有限公司 | Improved feedback control of a dc/dc power converter |
| CN104753345A (en) * | 2013-12-30 | 2015-07-01 | 展讯通信（上海）有限公司 | Technology for improving transient response of BUCK circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106817024A (en) | 2017-06-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106817024B (en) | Promote the buck power converter of transient response performance | |
| CN101552554B (en) | Control circuit of cascade type buck-boost converter and control method thereof | |
| CN105048808B (en) | Voltage conversion circuit, method and multi-phase parallel power supply system | |
| Kumar et al. | Quadratic boost converter with less input current ripple and rear-end capacitor voltage stress for renewable energy applications | |
| CN211352048U (en) | A control circuit of a four-switch buck-boost converter | |
| CN105162325B (en) | Pulse frequency modulation circuit based on reference voltage comparison oscillator | |
| CN106160452B (en) | Inhibit the power-supply system of electromagnetic interference | |
| CN106160459B (en) | The charge pump circuit system of fast transient response | |
| CN105811761B (en) | A kind of BOOST circuit of current sampling circuit and integrated current sample circuit | |
| CN110912405A (en) | Four-switch buck-boost converter based on voltage mode control | |
| CN106992670B (en) | Adaptive turn-on time control circuit for PFM mode boost type DC-DC converter | |
| CN108336905A (en) | A kind of DC-DC circuit | |
| CN204145302U (en) | Multiple transformers parallel connection type Width funtion input DC-DC switching power circuit | |
| CN106160458B (en) | Improve the BOOST circuit of transient response | |
| CN209948956U (en) | Voltage reduction circuit and electronic equipment | |
| CN106160467B (en) | Enhance the booster type DC-DC converter of transient response | |
| CN105811760B (en) | Improve the DC-DC converter of transient response | |
| CN109149938A (en) | A kind of DC-DC circuit | |
| CN115242089B (en) | Switching converter and control circuit and control method thereof | |
| CN105932875B (en) | A kind of outer synchronous DC/DC converter of adaptive band PLL latch function | |
| CN216959670U (en) | Voltage converter, battery module and power supply system | |
| CN105811755B (en) | A kind of step down switching voltage regulator improving transient response | |
| CN105099172B (en) | A kind of Switching Power Supply of novel pulse frequency modulated | |
| CN107317478A (en) | A kind of ON time control circuit in DC DC converters for ACOT control models | |
| CN115242083A (en) | Switching converter and its control circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |