CN106160467A - Strengthen the booster type dc-dc of transient response - Google Patents
Strengthen the booster type dc-dc of transient response Download PDFInfo
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- CN106160467A CN106160467A CN201510134263.6A CN201510134263A CN106160467A CN 106160467 A CN106160467 A CN 106160467A CN 201510134263 A CN201510134263 A CN 201510134263A CN 106160467 A CN106160467 A CN 106160467A
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Abstract
The present invention relates to electronic technology field, be specifically related to a kind of dc-dc.Strengthen the booster type dc-dc of transient response, including, one operating circuit being provided with energy-storage travelling wave tube, switchable it is connected to an input, an outfan, one crosses between node and an earth terminal, under PWM modulation signal or PFM modulated signal effect, control operating circuit alternately switching between charge mode and discharge mode；One control unit, in order to be produced PWM modulation signal or PFM modulated signal according to one by the input signal selecting switch to select, a sampling under the current detection signal effect of operating circuit.The present invention can select switch to switch over, the input signal of comparator to improve the transient response of circuit, to guarantee system stability when load current moment increases by one.
Description
Technical field
The present invention relates to electronic technology field, be specifically related to a kind of dc-dc.
Background technology
Booster type dc-dc is with its low suppling voltage, low-power consumption, high efficiency, high output voltage
It is widely used in the mobile device such as smart mobile phone, panel computer, according to control with the big features such as electric current that export
Making mechanism is different, and booster type dc-dc is divided into PWM (Pulse Width Modulation) to control
Mode processed, PFM (Pulse Frequency Modulation) control mode and mixed-control mode three kinds,
Mixed-control mode, in the case of heavy duty, uses PWM working method, under light load conditions, cuts
It is changed to PFM working method, to ensure, at whole loading range Internal Translator, all there is higher conversion effect
Rate, but, booster type dc-dc as shown in Figure 1 is in application process, at load jump
Time, the output voltage of transducer exists relatively greater than punching or decline, affects chip performance and system stability.
Summary of the invention
It is an object of the invention to, it is provided that a kind of booster type dc-dc strengthening transient response,
Solve above technical problem；
Technical problem solved by the invention can realize by the following technical solutions:
The booster type dc-dc of enhancing transient response, wherein, including,
One operating circuit being provided with energy-storage travelling wave tube, for producing an output voltage being higher than input voltage；
One switching device group, is connected in described operating circuit, in a PWM modulation signal or a PFM
The alternately switching between charge mode and discharge mode of described operating circuit is controlled under modulated signal effect；
One control unit, in order to the input signal selected by selection switch according to, a sampling from described storage
Produce described PWM modulation signal under the current detection signal effect of the charging current of energy element or PFM adjusts
Signal processed.
The booster type dc-dc of the enhancing transient response of the present invention, described control unit includes,
One comparator, for comparing described input signal with described current detection signal, produces ratio
Relatively signal；
One clock unit, is used for producing clock signal；
One PWM/PFM manipulator, described PWM/PFM manipulator connects described clock signal, is used for
Described PWM modulation signal or described PFM modulation is produced according to described comparison signal and described clock signal
Signal.
The booster type dc-dc of the enhancing transient response of the present invention, described selection switch is one the
Between one first signal and one second reference signal, a wherein road output is selected under the effect of one control signal
As described input signal.
The booster type dc-dc of the enhancing transient response of the present invention, described first signal is by one by mistake
Difference amplifier provides, and described error amplifier is by sampling from described DC-DC to a reference voltage and one
The voltage feedback signal of the outfan of transducer compares and obtains an error amplification signal, with described error
Amplify signal as described first signal.
The booster type dc-dc of the enhancing transient response of the present invention, described first control signal is led to
Crossing a logic control element to produce, the input of described logic control element connects described error amplification signal,
In order to described error amplification signal and one the 3rd reference voltage to be compared, produce institute according to comparative result
State the first control signal.
The booster type dc-dc of the enhancing transient response of the present invention, described operating circuit includes,
Charging controlling brancher, is connected to an earth terminal and and crosses between node；
Discharge and recharge branch road, is connected to an input and described crosses between node；
Control of discharge branch road, be connected to described in cross between node and described outfan；
Described energy-storage travelling wave tube is series on described discharge and recharge branch road；
Described operating circuit is when charge mode, and described charging controlling brancher and described discharge and recharge branch road turn on,
Described control of discharge branch road disconnects, and described energy-storage travelling wave tube is charged by the electric current of described input input；
Described operating circuit is when discharge mode, and described control of discharge branch road and described discharge and recharge branch road turn on,
Described charging controlling brancher disconnects, and described outfan is discharged by described energy-storage travelling wave tube.
The booster type dc-dc of the enhancing transient response of the present invention, described voltage feedback signal leads to
Crossing a feedback network to produce, described feedback network is mainly formed by a resistor voltage divider circuit, and described resistance divides
Volt circuit include predetermined number and be connected in series with each other between described outfan and described earth terminal point
Piezoresistance, the point-shaped being connected between described divider resistance becomes divider node, and described voltage feedback signal is from institute
State divider node to draw.
The booster type dc-dc of the enhancing transient response of the present invention, described current detection signal leads to
Crossing current detection circuit described in produce, described current detection circuit includes:
One detection resistance, is series on described current detection circuit；
One current sampling unit, connects the two ends of described detection resistance, flows through described detection electricity in order to detect
The electric current of resistance；
One is controlled to switch by the detection of described pulse-width signal control break-make, is connected to described current detecting
On circuit.
The booster type dc-dc of the enhancing transient response of the present invention, described detection controls switch and adopts
With the mos field effect transistor of N-channel.
Beneficial effect: due to use above technical scheme, the present invention can load current moment increase or
During reduction, select switch that the input signal of comparator is switched in time by one, the wink of circuit can be improved
State responds, to guarantee system stability.
Accompanying drawing explanation
Fig. 1 is the step-up DC-DC converter circuit structure figure of prior art；
Fig. 2 is the oscillogram of the coherent signal of prior art；
Fig. 3 is the step-up DC-DC converter circuit structure schematic diagram of the present invention；
Fig. 4 is the oscillogram of the coherent signal of the present invention.
Detailed description of the invention
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 present invention, and
It is not all, of embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art are not making
The every other embodiment obtained on the premise of going out creative work, broadly falls into the scope of protection of the invention.
It should be noted that in the case of not conflicting, the embodiment in the present invention and the spy in embodiment
Levy and can be mutually combined.
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings, but not as the present invention's
Limit.
In conjunction with prior art circuit structure such as Fig. 1 and coherent signal oscillogram as in figure 2 it is shown, load
When electric current increases suddenly, owing to circuit transient response is poor, it is impossible to follow the tracks of the change of load current in time,
The output end signal Vea_out of error amplifier slowly rises, cause current sampling signal CS slowly on
Rising, system response speed is the slowest.
The present invention provides a kind of booster type dc-dc strengthening transient response, with reference to Fig. 3, Fig. 4,
Including,
One operating circuit being provided with energy-storage travelling wave tube；Switchable it is connected to an input VDD, an output
End Vout, one cross between node Lx and an earth terminal GND, in PWM modulation signal or PFM
Operating circuit alternately switching between charge mode and discharge mode is controlled under modulated signal effect；
One control unit, in order to the input signal selected by selection switch according to, a sampling from energy storage unit
Modulated signal is produced under the current detection signal CS effect of part charging current.
The booster type dc-dc of the enhancing transient response of the present invention, control unit can include,
One comparator 2, for comparing input signal with current detection signal CS, produces and compares letter
Number；
One clock unit 5, is used for producing clock signal；
One PWM/PFM manipulator 1, PWM/PFM manipulator 1 connects clock signal, for foundation
Comparison signal and clock signal produce PWM modulation signal or PFM modulated signal.
The booster type dc-dc of the enhancing transient response of the present invention, selecting to switch 9 can be one
Select between one first signal and one second reference signal Vref2 under the effect of the first control signal SEL
Wherein a road exports as input signal.By selecting the switching of switch 9, so that load current wink
Between when becoming big, the second reference signal Vref2 is accessed comparator 2 so that current sampling signal CS's is anti-
Should be unlikely to too slow, the transient response of circuit can be improved, to guarantee system stability.
The booster type dc-dc of the enhancing transient response of the present invention, the first signal is put by an error
Big device 6 provides, and error amplifier 6 is by changing from DC-DC reference voltage V ref and a sampling
The voltage feedback signal Vfb of the outfan of device compares, with the error amplification signal Vea_out obtained
As the first signal.
The booster type dc-dc of the enhancing transient response of the present invention, the first control signal SEL is led to
Crossing a logic control element 8 to produce, the input VDD of logic control element 8 connects error and amplifies letter
Number Vea_out, in order to compare error amplification signal Vea_out and one the 3rd reference voltage, depends on
The first control signal SEL is produced according to comparative result.Logic control element 8 when load current increases suddenly,
Produce the first control signal SEL.
The booster type dc-dc of the enhancing transient response of the present invention, operating circuit includes,
Charging controlling brancher, is connected to earth terminal GND and crosses between node Lx；
Discharge and recharge branch road, is connected to input VDD and crosses between node Lx；
Control of discharge branch road, is connected to cross between node Lx and output end vo ut；
Energy-storage travelling wave tube L is series on discharge and recharge branch road；
Operating circuit is when charge mode, and charging controlling brancher and the conducting of discharge and recharge branch road, control of discharge props up
Road disconnects, and energy-storage travelling wave tube L is charged by the electric current making input VDD input；
Operating circuit is when discharge mode, and control of discharge branch road and discharge and recharge branch road turn on, and control charging
Controlling brancher disconnects, and makes energy-storage travelling wave tube L discharge output end vo ut.
The booster type dc-dc of the enhancing transient response of the present invention, current detection signal CS passes through
One current detection circuit produces, and current detection circuit includes:
One detection resistance Rb, is series on current detection circuit；
One current sampling unit 3, connects the two ends of detection resistance Rb, flows through detection resistance in order to detect
The electric current of Rb；
One is controlled the detection control switch Msen of break-make by pulse-width signal, is connected to current detection circuit
On.Current detection circuit can use other circuit structures of the prior art to realize, and does not repeats at this.
The booster type dc-dc of the enhancing transient response of the present invention, voltage feedback signal Vfb leads to
Crossing a feedback network to produce, feedback network is mainly formed by a resistor voltage divider circuit, resistor voltage divider circuit bag
Include predetermined number and the dividing potential drop electricity being connected in series with each other between output end vo ut and earth terminal GND
Resistance, the point-shaped being connected between divider resistance becomes divider node, voltage feedback signal Vfb to draw from divider node
Go out.
A kind of specific embodiment, charging controlling brancher is connected a N-channel MOS pipe Mn, control of discharge
Connect on branch road a P-channel metal-oxide-semiconductor Mp；Wherein the substrate of N-channel MOS pipe Mn is controlled by one
The control of signal Body SEL.One electric capacity C is connected between output end vo ut and earth terminal GND；
Resistance R1 and resistance R2, the voltage being serially connected it is also connected with between output end vo ut and earth terminal GND
Draw at the point that feedback signal self-resistance R1 and resistance R2 is connected.
The booster type dc-dc of the enhancing transient response of the present invention, it is also possible to include a zero passage inspection
Slowdown monitoring circuit 7, is connected with PWM/PFM manipulator 1.The zero cross detection circuit of prior art can be used
Realizing, therefore not to repeat here.
The present invention can select switch to select the second reference signal when load current moment changes by one
Vref2 accesses comparator, compares to produce corresponding modulated signal with current detection signal CS, real
Show the input signal to comparator to switch in time, the transient response of circuit can have been improved, to guarantee system
Stable.
The foregoing is only preferred embodiment of the present invention, not thereby limit embodiments of the present invention and
Protection domain, to those skilled in the art, it should can appreciate that all utilization description of the invention
And the equivalent done by diagramatic content and the scheme obtained by obvious change, all should comprise
Within the scope of the present invention.
Claims (9)
1. strengthen the booster type dc-dc of transient response, it is characterised in that include,
One operating circuit being provided with energy-storage travelling wave tube, for producing an output voltage being higher than input voltage；
One switching device group, is connected in described operating circuit, in a PWM modulation signal or a PFM
The alternately switching between charge mode and discharge mode of described operating circuit is controlled under modulated signal effect；
One control unit, in order to the input signal selected by selection switch according to, a sampling from described storage
Produce described PWM modulation signal under the current detection signal effect of the charging current of energy element or PFM adjusts
Signal processed.
The booster type dc-dc of enhancing transient response the most according to claim 1, it is special
Levying and be, described control unit includes,
One comparator, for comparing described input signal with described current detection signal, produces ratio
Relatively signal；
One clock unit, is used for producing clock signal；
One PWM/PFM manipulator, described PWM/PFM manipulator connects described clock signal, is used for
Described PWM modulation signal or described PFM modulation is produced according to described comparison signal and described clock signal
Signal.
The booster type dc-dc of enhancing transient response the most according to claim 1, its feature
Being, described selection switchs under the effect of one first control signal in one first signal and one second reference
A wherein road is selected to export as described input signal between signal.
The booster type dc-dc of enhancing transient response the most according to claim 3, its feature
Being, described first signal is provided by an error amplifier, and described error amplifier is by a benchmark electricity
Pressure and a sampling compare from the voltage feedback signal of the outfan of described dc-dc and obtain one
Error amplification signal, using described error amplification signal as described first signal.
The booster type dc-dc of enhancing transient response the most according to claim 4, it is special
Levying and be, described first control signal is produced by a logic control element, described logic control element
Input connects described error amplification signal, in order to described error amplification signal and one the 3rd reference voltage
Compare, produce described first control signal according to comparative result.
The booster type dc-dc of enhancing transient response the most according to claim 1, it is special
Levying and be, described operating circuit includes,
Charging controlling brancher, is connected to an earth terminal and and crosses between node；
Discharge and recharge branch road, is connected to an input and described crosses between node；
Control of discharge branch road, be connected to described in cross between node and described outfan；
Described energy-storage travelling wave tube is series on described discharge and recharge branch road；
Described operating circuit is when charge mode, and described charging controlling brancher and described discharge and recharge branch road turn on,
Described control of discharge branch road disconnects, and described energy-storage travelling wave tube is charged by the electric current of described input input；
Described operating circuit is when discharge mode, and described control of discharge branch road and described discharge and recharge branch road turn on,
Described charging controlling brancher disconnects, and described outfan is discharged by described energy-storage travelling wave tube.
The booster type dc-dc of enhancing transient response the most according to claim 4, its feature
Being, described voltage feedback signal is produced by a feedback network, and described feedback network is mainly by a resistance
Bleeder circuit is formed, and described resistor voltage divider circuit includes predetermined number and is connected in series with each other in described defeated
Going out the divider resistance between end and described earth terminal, the point-shaped being connected between described divider resistance becomes dividing potential drop to save
Point, described voltage feedback signal is drawn from described divider node.
The booster type dc-dc of enhancing transient response the most according to claim 1, it is special
Levying and be, described current detection signal is produced by current detection circuit described in, described current detecting electricity
Road includes:
One detection resistance, is series on described current detection circuit；
One current sampling unit, connects the two ends of described detection resistance, flows through described detection electricity in order to detect
The electric current of resistance；
One is controlled to switch by the detection of described pulse-width signal control break-make, is connected to described current detecting
On circuit.
The booster type dc-dc of enhancing transient response the most according to claim 1, it is special
Levying and be, described detection controls switch and uses the mos field effect transistor of N-channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510134263.6A CN106160467B (en) | 2015-03-25 | 2015-03-25 | Enhance the booster type DC-DC converter of transient response |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510134263.6A CN106160467B (en) | 2015-03-25 | 2015-03-25 | Enhance the booster type DC-DC converter of transient response |
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| CN106160467A true CN106160467A (en) | 2016-11-23 |
| CN106160467B CN106160467B (en) | 2018-08-10 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109002077A (en) * | 2018-08-17 | 2018-12-14 | 电子科技大学 | A kind of transient state enhancing circuit |
| TWI784279B (en) * | 2020-05-29 | 2022-11-21 | 大陸商北京集創北方科技股份有限公司 | DC-DC conversion circuit and information processing device |
| WO2023087221A1 (en) * | 2021-11-18 | 2023-05-25 | 华为技术有限公司 | Power supply circuit and electronic device |
| CN117879348A (en) * | 2023-04-26 | 2024-04-12 | 杭州顺元微电子有限公司 | Step-down DCDC converter |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1543046A (en) * | 2003-04-16 | 2004-11-03 | 罗姆股份有限公司 | Power supply apparatus |
| JP2005130616A (en) * | 2003-10-23 | 2005-05-19 | Matsushita Electric Ind Co Ltd | Power system |
| US20110057635A1 (en) * | 2009-09-10 | 2011-03-10 | Renesas Electronics Corporation | Switching regulator |
| US20120235656A1 (en) * | 2011-03-14 | 2012-09-20 | Kabushiki Kaisha Toshiba | Current-direction detecting circuit and dc-dc converter |
-
2015
- 2015-03-25 CN CN201510134263.6A patent/CN106160467B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1543046A (en) * | 2003-04-16 | 2004-11-03 | 罗姆股份有限公司 | Power supply apparatus |
| JP2005130616A (en) * | 2003-10-23 | 2005-05-19 | Matsushita Electric Ind Co Ltd | Power system |
| US20110057635A1 (en) * | 2009-09-10 | 2011-03-10 | Renesas Electronics Corporation | Switching regulator |
| US20120235656A1 (en) * | 2011-03-14 | 2012-09-20 | Kabushiki Kaisha Toshiba | Current-direction detecting circuit and dc-dc converter |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109002077A (en) * | 2018-08-17 | 2018-12-14 | 电子科技大学 | A kind of transient state enhancing circuit |
| CN109002077B (en) * | 2018-08-17 | 2020-07-10 | 电子科技大学 | Transient enhancement circuit |
| TWI784279B (en) * | 2020-05-29 | 2022-11-21 | 大陸商北京集創北方科技股份有限公司 | DC-DC conversion circuit and information processing device |
| WO2023087221A1 (en) * | 2021-11-18 | 2023-05-25 | 华为技术有限公司 | Power supply circuit and electronic device |
| CN117879348A (en) * | 2023-04-26 | 2024-04-12 | 杭州顺元微电子有限公司 | Step-down DCDC converter |
| CN117879348B (en) * | 2023-04-26 | 2024-06-11 | 杭州顺元微电子有限公司 | Step-down DCDC converter |
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| Publication number | Publication date |
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| CN106160467B (en) | 2018-08-10 |
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