CN105094194B - voltage control method - Google Patents

voltage control method Download PDF

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Publication number
CN105094194B
CN105094194B CN201410201529.XA CN201410201529A CN105094194B CN 105094194 B CN105094194 B CN 105094194B CN 201410201529 A CN201410201529 A CN 201410201529A CN 105094194 B CN105094194 B CN 105094194B
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China
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voltage
signal
electronic switch
load
produce
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CN201410201529.XA
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Chinese (zh)
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CN105094194A (en
Inventor
黄广顺
黄伟骐
吴建兴
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万国半导体(开曼)股份有限公司
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Abstract

The invention discloses a voltage control method. The method comprises the following steps: first dividing a load voltage on a load to generate a feedback voltage, and extracting an absolute value of a periodic triangular wave signal to generate a positive feedback signal; then adding the positive feedback signal and the feedback voltage together to generate a sum signal, comparing the sum signal with a target voltage, and updating the load voltage by utilizing an input voltage when the sum signal is smaller than the target voltage; or comparing the sum of the feedback voltage and the periodic triangular wave signal and the feedback voltage respectively with the target voltage, and when the sum and the feedback voltage are respectively smaller than the target voltage, updating the load voltage by utilizing the input voltage. After the load voltage is updated, the situation that the instantaneous load voltage or the stable-state load voltage of the load is unstable can be avoided.

Description

Voltage control method

Technical field

The present invention is, with regard to the control method in a kind of power-supply management system, particularly with regard to regard to one kind voltage to be realized The method of control.

Background technology

The adjustment system of the supply of electric power of integrated circuit is using coboundary field-effect transistor (high-side FET) with Border field-effect transistor (low-side FET) is designed as the ON-OFF control circuit of voltage x current.Electric current is by coboundary Load is flowed at junction/node that the source electrode of field-effect transistor is connected with the drain electrode of lower boundary field-effect transistor.This Load system concatenates with inductor, and is have capacitor to load with this and connect.When starting in the cycle, coboundary field-effect transistor is Conducting, but lower boundary field-effect transistor is cut-off, and electric current system flows to inductance via the coboundary field-effect transistor of conducting Device, capacitor and load.This electric current will rise will the stored quantity of electric charge of capacitor.And when load institute across voltage reach mesh During mark level, coboundary field-effect transistor will be caused to switch to cut-off, and lower boundary field-effect transistor switches to conducting, this When electric current will be via capacitor discharge.Therefore turn on and cut by coboundary field-effect transistor and lower boundary field-effect transistor Interaction switching only, so that output voltage will not change with rising or falling for inductive current.

As shown in Figure 1, the switching control of conventional art includes 10, coboundary field effect of a comparison controller Answer transistor (high-side FET) 12 and a lower boundary field-effect transistor (low-side FET) 14.This coboundary The drain electrode of field-effect transistor 12 is electrically connected at input voltage source VIN, and the source electrode system of this coboundary field-effect transistor 12 with The drain electrode of this lower boundary field-effect transistor 14 is electrically connected with.The source electrode of this lower boundary field-effect transistor 14 is attached to ground connection End.And grid (or the lock of the grid (or gate) of this coboundary field-effect transistor 12 and this lower boundary field-effect transistor 14 Pole) it is electrically connected with the comparison controller 10 respectively.It is relative by producing when enough voltage is acted on the grid of transistor The electric current answered is between drain electrode and source electrode.Via the control operation of voltage x current, the grid of this coboundary field-effect transistor 12 are made The grid of pole and this lower boundary field-effect transistor 14 is by interaction conducting and ends.Additionally, an inductor 16 is attached to this At node that the source electrode of coboundary field-effect transistor 12 is connected with the drain electrode of this lower boundary field-effect transistor 14 or junction. And a load 18 is to be serially connected between this inductor 16 and earth terminal, and this load 18 is to would span across an output voltage VO

When this coboundary field-effect transistor 12 and this lower boundary field-effect transistor 14 will be turned on and cutting for ending When changing, the grid of transistor be will to keep former on or off for a period of time.And by bleeder circuit 20 to output voltage VO Sample to obtain a feedback voltage F.In addition, addition process device 26 is in the source electrode and inductance of lower boundary field-effect transistor 14 One end of device 16 captures a cycle triangular wave signal.Feedback voltage F is with triangular wave signal system via the phase of addition process device 26 Plus after, produce a summation signal S.Comparison controller 10 compares this summation signal S with a target voltage T-phase, wherein this Target voltage T is by produced by a target voltage generator 22.When this summation signal S-phase is equal to this target voltage T, the ratio It is will to produce to trigger signal so that 14 points of coboundary field-effect transistor 12 and this lower boundary field-effect transistor compared with controller 10 Do not turn on the switching with cut-off.Additionally, being have a capacitor 24 with this load 18 and connect.

When 18 generation instantaneously variation is loaded, such as when load 18 becomes gently to load from heavy duty, then in load 18 Electric current will be reduced rapidly, and now the electric current on inductor 16 can be with the current reduction in load 18.And boundary field on top When effect transistor 12 performs respectively cut-off with conducting with lower boundary field-effect transistor 14, lower boundary field-effect transistor 14 Drain electrode occurs a trapezoidal wave signal with the voltage drop of source electrode, if coboundary field-effect transistor 12 is brilliant with lower boundary field-effect Body pipe 14 is presented and periodically switched, then trapezoidal wave signal also can be presented periodically.Because triangular wave signal is by the cycle instantly Trapezoidal wave signal deducts the final voltage of a periodic trapezoid ripple and is formed, and because now go up a periodic trapezoid ripple final voltage it Absolute value more than the trapezoidal wave signal in cycle instantly absolute value, so when triangular wave signal have a negative voltage and produce, enter And allow summation signal S less than target voltage T, and coboundary field-effect transistor 12 is opened, load 18 is provided energy to, can be real Now make output voltage VOImprove.Meanwhile, and because the electric current in load 18 is reduced rapidly, therefore it is saturating by inductor 16 to have electric current Cross or flowed toward ground terminal by electric capacity 24, cause output voltage VOIt is constantly repeatedly high, form unstable phenomenon.

Therefore, the present invention ties up to the puzzlement for above-mentioned prior art, proposes a kind of voltage control method, current to solve Problem produced by known scheme.

The content of the invention

The main object of the present invention, is to provide a kind of voltage control method, and it is to capture in periodic triangular ripple signal Positive information, or can be cut with controlling switch to produce while target voltage is compared respectively with summation signal and feedback voltage Signal is alternatively controlled, in load steady state or transient change, to reach the effect of regulated output voltage.

It is that, up to above-mentioned purpose, the present invention provides a kind of voltage control method, first, the upper load electricity of one load of partial pressure Pressure, to produce a feedback voltage, and the absolute value of acquisition a cycle triangular wave signal, to produce a positive feedback news Number.Then, feedback voltage and positive feedback signal are added, to produce a summation signal.Come again, compare summation signal and a mesh Mark voltage, when summation signal is less than target voltage, produces a control signal.Finally, this control signal, and profit accordingly are received Updated with an input voltage and steady load voltage.

The present invention also provides a kind of voltage control method, first, the upper load voltage of one load of partial pressure, to produce a time Award voltage.Then, feedback voltage and a cycle triangular wave signal are added, to produce a summation signal.Come again, by summation Signal compares respectively with feedback voltage with a target voltage, when summation signal and feedback voltage are smaller than target voltage, point Chan Sheng not one first control signal and one second control signal.Finally, receive first and control signal and the second control signal, And utilize an input voltage to update and steady load voltage accordingly.

Hereby by reader the architectural feature and effect for reaching of the present invention are more had it is further understand and understanding, careful assistant with Preferred embodiment figure and coordinate detailed description, illustrate such as content hereinafter.

In one embodiment, a kind of voltage control method is disclosed, is comprised the steps of:One load of partial pressure is upper negative Voltage is carried, to produce a feedback voltage, and the absolute value of acquisition a cycle triangular wave signal, to produce a positive feedback Signal;The feedback voltage and the positive feedback signal are added, to produce a summation signal;Compare the summation signal and a target Voltage, and when the summation signal is less than the target voltage, produce a control signal;And receive the control signal, and according to This updates and stablizes the load voltage using an input voltage.

Said method, this controls signal for high levle signal.

Said method, the load connects a divider, and it is the partial pressure load voltage, to produce the feedback voltage.

Said method, the load connects first electronic switch and second electronic switch, wherein second electronics Switch ground connection, first electronic switch receives the control signal, and is updated using the input voltage according to the control signal and steady The fixed load voltage.

Said method, the load is connected in parallel with a capacitor.

Said method, second electronic switch connects an Absolute value generator, and it is connected an addition with the divider Device, the Absolute value generator receives the voltage drop across second electronic switch, and capture accordingly the triangular wave signal this is exhausted To value, to produce the positive feedback signal to the adder, the divider transmits the feedback voltage to the adder, the adder phase Plus the positive feedback signal and the feedback voltage, to produce the summation signal.

Said method, the adder is connected a comparison controller, the comparison controller with a target voltage generator Connect first electronic switch and second electronic switch, the comparison controller receives being somebody's turn to do produced by the target voltage generator Target voltage and the summation signal, by its relatively after, produce the control signal and give first electronic switch, and drive this second electric Son switch.

Said method, when first electronic switch is to open, to close, first electronic switch is second electronic switch During closing, second electronic switch is unlatching.

In another embodiment, a kind of voltage control method is disclosed, is comprised the steps of:Partial pressure one loads it Load voltage, to produce a feedback voltage;The feedback voltage and a cycle triangular wave signal are added, it is total to produce one And signal;The summation signal is compared respectively with the feedback voltage with a target voltage, and in the summation signal and the feedback When voltage is smaller than the target voltage, one first control signal and one second control signal are produced respectively;And reception should First control signal and the second control signal, and the load voltage is updated using an input voltage and stablized accordingly.

Said method, the first control signal is all high levle signal with the second control signal.

Said method, in the reception first control signal and the second control signal, and utilizes the input voltage more accordingly In step that is new and stablizing the load voltage, also comprise the steps of:The first control signal and the second control signal are received, And be multiplied, to produce one the 3rd control signal;And the 3rd control signal is received, and the input voltage is utilized accordingly Update and stablize the load voltage.

Said method, the 3rd controls signal for high levle signal.

Said method, the load connects a divider, and it is the partial pressure load voltage, to produce the feedback voltage.

Said method, the load connects first electronic switch and second electronic switch, second electronic switch Ground connection, first electronic switch is connected a controller with second electronic switch, and it is the output end for connecting and door, should It is connected a first comparator and second comparator with the input of door, the first comparator receives the target voltage and is somebody's turn to do Summation signal, and by its relatively after, produce the first control signal, second comparator receives the target voltage with feedback electricity Pressure, and by its relatively after, produce this second control signal, should with door receive this first control signal with this second control signal, And be multiplied, to produce the 3rd control signal, the controller receives the 3rd control signal, and drives this first electric accordingly Son switch updates and stablizes the load voltage with second electronic switch using the input voltage.

Said method, the load is connected in parallel with a capacitor.

Said method, second electronic switch is connected an addition process device with the divider, and the addition process device is received Triangular wave signal that the feedback voltage is formed with the voltage drop across second electronic switch, to produce the summation signal.

Said method, the addition process device is connected the first comparator with a target voltage generator, and it is to receive to be somebody's turn to do The target voltage produced by target voltage generator, the divider connects second comparator and the target voltage generator.

Said method, when first electronic switch is to open, to close, first electronic switch is second electronic switch During closing, second electronic switch is unlatching.

Description of the drawings

With reference to appended accompanying drawing, more fully to describe embodiments of the invention.However, appended accompanying drawing be merely to illustrate and Illustrate, and be not meant to limit the scope of the invention.

Fig. 1 is the circuit diagram of the switching control of prior art.

Fig. 2 is the circuit diagram of the switching control using voltage control method of the present invention.

Fig. 3 is each signal waveform schematic diagram of the present invention.

Fig. 4 is the circuit diagram of another switching control using voltage control method of the present invention.

Specific embodiment

The 2nd figure is referred to, one embodiment of the present invention is first introduced below.Switching used in one embodiment Control device includes first electronic switch 28 and second electronic switch 30, and it is all with field effect transistor M OSFET As a example by (IGBT, BJT etc. switch be also suitable for).First electronic switch 28 connects 31, comparison controller of an input voltage source 32 and second electronic switch 30.Second electronic switch 30 is grounded (such as source ground), and connects comparison controller 32.Relatively control Device 32 connects a target voltage generator 34.First electronic switch 28 and the second electronic switch 30 are passed through or by one jointly Inductance 36 connects one end of a load 38, and such as inductance 36 is connected to connecting node N between switch 28,30 and load 38 Between the one end, the other end for loading 38 is then grounded.Additionally, load 38 also with an electric capacity 40 and in parallel with a divider 42. Drain electrode as the field-effect transistor of the second electronic switch 30 is connected an Absolute value generator 44, this absolute value simultaneously with source electrode Generator 44 is connected an adder 46, and the connection comparison controller 32 of adder 46 simultaneously with divider 42.

This switching control mainly produces a control signal C using comparison controller 32 or one is closed signal D and given First electronic switch 28 switches over (here signal can claim signal), while also driving the second electronic switch 30 to switch over.When It is according to control signal C when first electronic switch 28 receives the high levle signal (or claiming logically high signal) as control signal C Using an input voltage V of input voltage source 31INUpdate and the load voltage V in steady load 38O.Now, the first electronics Switch 28 is opened, and the second electronic switch 30 may turn off, therefore, input voltage source 31 will be provided through the first electronic switch 28 One input voltage VIN, make inductance 36 produce an inductive current IL, this inductive current ILCan flow with electric capacity 40 toward load 38, Wherein from inductive current ILThe current definition for separating dealing 38 flowings of load is output current IO.In addition, when the first electronic switch 28 When receiving as the low level signal (or claiming logic low signal) for closing signal D, the first electronic switch 28 is closed, the second electronic cutting Close 30 may turn on, now, electric current can be from electric capacity 40 sequentially through the second electronic switch 30 is with inductance 36 and tapers into.

The voltage control method of the present invention introduced below.First, comparison controller 32 provides the Gao Zhun as control signal C Position signal gives the first electronic switch 28, while driving the second electronic switch 30, makes the first electronic switch 28 and the second electronic switch 30 are separately turned on and closing, then input voltage source 31 will provide an input voltage V through the first electronic switch 28IN, make electricity Sense 36 produces an inductive current IL, this inductive current ILCan flow with electric capacity 40 toward load 38, to produce one in load 38 Load voltage VO, so using partial pressure this load voltage V of divider 42O, just can produce a feedback voltage (or claim feedback electricity Pressure) F.Meanwhile, comparison controller 32 according to user set, make the first electronic switch 28 and the second electronic switch 30 be separately turned on After closing is continued for some time, such as 1 microsecond (us), comparison controller 32 provide as close signal D low level signal to First electronic switch 28, while drive the second electronic switch 30 to open, make the first electronic switch 28 and the second electronic switch 30 it On off state is exchanged, due to now inductive current ILCan be more and more little.Now, Absolute value generator 44 is received as the second electronics Voltage drop V between the source electrode of the field-effect transistor of switch 30 and drain electrodeDS, and obtain accordingly a cycle triangular wave signal it The absolute value of first triangular wave, to produce a positive feedback signal (or claiming positive feedback signal) P.Come again, adder 46 is received This positive feedback signal P and feedback voltage F, and they are added, to produce a summation signal S.Comparison controller 32 connects The target voltage T that this summation signal S is produced with target voltage generator 34 is received and compares, when detection finds this summation signal When S is less than target voltage T, comparison controller 32 produces control signal C to the first electronic switch 28, while driving the second electronic cutting Close 30 to switch over, the first electronic switch 28 and the second electronic switch 30 is separately turned on and closing.First electronic switch 28 connects This control signal C is received, and utilizes input voltage V accordinglyINUpdate and steady load voltage VO.Meanwhile, comparison controller 32 is according to making User sets, and after making the first electronic switch 28 and the second electronic switch 30 be separately turned on being continued for some time with closing, such as 1 is micro- Second (us), comparison controller 32 is provided as the low level signal of signal D is closed to the first electronic switch 28, while driving second Electronic switch 30, makes the first electronic switch 28 exchange with the on off state of the second electronic switch 30, due to now inductive current IL Can be more and more little.Now, Absolute value generator 44 receives source electrode and the leakage of the field-effect transistor as the second electronic switch 30 The voltage drop V of interpolarDS, and the absolute value of second triangular wave of (or sample, take) periodic triangular ripple signal is captured accordingly. By that analogy, the present invention can capture the absolute value of the 3rd triangular wave, and constantly running is gone down.

Please refer to the 3rd figure, wherein N nodes are the source electrode of the field-effect transistor as the first electronic switch 28. In conventional art, when loading 38 and producing variation, such as when loading 38 and becoming gently to load from heavy duty, then output current IOJust Can reduce rapidly, and now inductive current ILCan be with output current IOReduce.Due to as the field-effect of the second electronic switch 30 Voltage drop V between the source electrode of transistor and drain electrodeDSWhat is can become is lower, so when triangular wave signal have negative voltage and produce, And then allow summation signal S less than target voltage T, and the first electronic switch 28 is opened, load 38 is provided energy to, make load electricity Pressure VOImprove, as shown in phantom in FIG., feedback voltage F is improved and then represented load voltage VOImprove.But in the present invention, using exhausted Negative voltage in triangular wave signal is filtered out by value generator 44, summation signal S so just can be avoided to be less than target easily Voltage T, and then avoid the first electronic switch 28 of unlatching from providing energy to load 38, with steady load voltage VO, such as in figure It is shown in solid.In addition to load instantaneous (or transient state), when being even supported on stable state, only there is positive information using the present invention Triangular wave signal still can be with steady load voltage VO

Refer to the 4th figure, second embodiment of the present invention introduced below.Switching control used in second embodiment Device processed includes first electronic switch 48 and second electronic switch 50, and it is all by taking field-effect transistor as an example.First Electronic switch 48 connects 52, electronic switch 50 of main control unit 54 and second of an input voltage source.Second electronic switch 50 ground connection, and connect main control unit 54.First electronic switch 48 connects through an inductance 58 jointly with the second electronic switch 50 One end of a load 60 is connect, the other end for loading 60 is then grounded.Additionally, load 60 also with an electric capacity 62 and with a partial pressure Device 64 is in parallel.Drain electrode as the field-effect transistor of the second electronic switch 50 adds with source electrode and divider 64 while being connected one Method processor 66, and addition process device 66 is connected respectively a first comparator 68 and second comparator with divider 64 70, first comparator 68 is all connected a target voltage generator 71 and main control unit 54 with the second comparator 70.Main control Device 54 further includes one with door 72 (also referred to as AND or and lock) and a controller 74.It is connected first with the input of door 72 The comparator 70 of comparator 68 and second, output end then connects controller 74.Controller 74 is the first electronic switch 48 of connection and the Two electronic switches 50 (for example controlling their gate terminal).The comparator 70 of first comparator 68 and second produces respectively one first Control signal C1 and one second control signal C2, the first control signal C1 and the second control signal C2 is then multiplied to produce with door 72 Raw one the 3rd control signal C3 makes controller 74 drive the first electronic switch 48 according to the 3rd control signal C3 to controller 74 With the switching that the second electronic switch 50 carries out closure or openness.

This switching control is mainly closed signal D and drives the using controller 74 according to the 3rd control signal C3 or one One electronic switch 48 is switched over the second electronic switch 50.When the first electronic switch 48 receive as the 3rd control signal C3 it During high levle signal, the first electronic switch 48 is opened, and the second electronic switch 50 may turn off, and now, input voltage source 52 will An input voltage V is provided through the first electronic switch 48IN, make inductance 58 produce an inductive current IL, this inductive current IL 60 can flow with electric capacity 62 toward load, wherein from inductive current ILThe current definition for separating dealing 60 flowings of load is output current IO.In addition, when the first electronic switch 48 is received as the low level signal for closing signal D, the first electronic switch 48 is closed, the Two electronic switches 50 may turn on, now, electric current can from electric capacity 62 sequentially through the second electronic switch 50 with inductance 58 and gradually Diminish.

The voltage control method of the present invention introduced below.First, controller 74 provides the height as the 3rd control signal C3 Level signal gives the first electronic switch 48, while driving the second electronic switch 50, makes the first electronic switch 48 and the second electronic cutting Close 50 to be separately turned on and closing, then input voltage source 52 will provide input voltage V through the first electronic switch 48IN, make inductance 58 produce an inductive current IL, this inductive current ILCan flow with electric capacity 62 toward load 60, be born with producing one in load 60 Carry voltage VO, so using partial pressure this load voltage V of divider 64O, to produce a feedback voltage F.Meanwhile, controller 74 according to User sets, after making the first electronic switch 48 and the second electronic switch 50 be separately turned on being continued for some time with closing, such as 1 Microsecond (us), controller 74 is provided as the low level signal of signal D is closed to the first electronic switch 48, while driving second is electric Son switch 50, makes the first electronic switch 48 exchange with the on off state of the second electronic switch 50.Now inductive current ILCan more come It is less.Now, addition process device 66 receives the voltage drop V between the source electrode of the second electronic switch 50 and drain electrodeDS, and capture one accordingly First triangular wave of individual periodic triangular ripple signal, it is added with feedback voltage F, to produce a summation signal S.The One comparator 68 receives and compares the target voltage T that this summation signal S is produced with target voltage generator 71, and here is total When being less than target voltage T with signal S, the high levle signal as one first control signal C1 is produced.Second comparator 70 connects Feedback voltage F and target voltage T is received and compared, and when feedback voltage F is less than target voltage T, is produced as one second control The high levle signal of signal C2 processed.First is received with door 72 and control the control signal C2 of signal C1 and second, and be multiplied, to produce The raw high levle signal as one the 3rd control signal C3.Controller 74 receives this 3rd control signal C3, and drives accordingly First electronic switch 48 and the second electronic switch 50 are separately turned on and closing, with using input voltage VINUpdate and steady load electricity Pressure VO

In the above-mentioned methods, it is to receive the first control signal C1 and the second control signal C2 using with door 72, and gives phase Take advantage of, to produce the 3rd control signal C3.Then, controller 74 receives this 3rd control signal C3, and drives the first electronics accordingly The electronic switch 50 of switch 48 and second, using input voltage VINUpdate and steady load voltage VO.Additionally, can also also utilize one Replacing, i.e., main control unit 54 receives first and controls signal C1 and controls signal C2 with second individual actuation step, and drives accordingly First electronic switch 48 and the second electronic switch 50, using input voltage VINUpdate and steady load voltage VO

Please refer to the 3rd figure and the 4th figure, wherein N nodes are the source electrode of the first electronic switch 48.In the conventional technology, When loading 60 and producing variation, such as when loading 60 and becoming gently to load from heavy duty, then output current IOWill reduce rapidly, And now inductive current ILCan be with output current IOReduce.Due to the source of the field-effect transistor as the second electronic switch 50 Voltage drop V between pole and drain electrodeDSWhat is can become is lower, so when triangular wave signal have negative voltage and produce, and then allow summation Signal S is less than target voltage T, opens the first electronic switch 48, provides energy to load 60, makes load voltage VOImprove, As shown in phantom in FIG., feedback voltage F is improved and is then represented load voltage VOImprove.In other words, because triangular wave signal has negative electricity Pressure is produced, so when comparing triangular wave signal and not having negative voltage to produce, load voltage VOCan more improve.However, in load Voltage VOWhen not yet declining, because the negative voltage of triangular wave signal is too low, cause at next cycle, load voltage VOChange once again High/folded height.Therefore in the present invention, judge the relation of feedback voltage F and target voltage T using the second comparator 70, cooperate with and The effect of door 72, when feedback voltage F is more than target voltage T, closes the first electronic switch 48, to stop that energy is supplied to load 60, with steady load voltage VO, as shown by the solid line in the drawings.In addition to when loading wink or transient state, when being even supported on stable state, profit With the present invention when feedback voltage F is more than target voltage T, stop the condition of energy offer, still can be with steady load voltage VO

In sum, the present invention is using the magnitude relationship between feedback voltage and target voltage, or only has positive information Triangular wave signal reaches the purpose of steady load voltage as the foundation of switching electronic switch.

Symbol description:Comparison controller 10, coboundary field-effect transistor 12 (can also be expressed as high side MOS transistor), Lower boundary field-effect transistor 14 (can also be expressed as downside MOS transistor), inductor 16, load 18, bleeder circuit 20, target Voltage generator 22, capacitor 24, addition process device 26, the first electronic switch 28, the second electronic switch 30, input voltage source 31st, comparison controller 32, target voltage generator 34, inductance 36, load 38, electric capacity 40, divider 42, Absolute value generator 44th, adder 46, the first electronic switch 48, the second electronic switch 50, input voltage source 52, main control unit 54, inductance 58, negative Carry 60, electric capacity 62, divider 64, the first comparator 68 of addition process device 66, the second comparator 70, target voltage generator 71, With door 72, controller 74.

Claims (18)

1. a kind of voltage control method, it is characterised in that comprise the steps of:
The upper load voltage of the load of partial pressure one, to produce a feedback voltage, and in the source electrode of border field-effect transistor once and leakage The voltage drop of pole captures the absolute value of a periodic triangular ripple signal, to produce a positive feedback signal;
The feedback voltage and the positive feedback signal are added, to produce a summation signal;
Compare the summation signal and a target voltage, and when the summation signal is less than the target voltage, produces one and control signal; And
Receive the control signal, and update using an input voltage and stablize the load voltage accordingly.
2. voltage control method as claimed in claim 1, it is characterised in that this controls signal for high levle signal.
3. voltage control method as claimed in claim 1, it is characterised in that the load connects a divider, it is that partial pressure should Load voltage, to produce the feedback voltage.
4. voltage control method as claimed in claim 3, it is characterised in that the load connects one first electronic switch and one the Two electronic switches, the second electronic switch ground connection, first electronic switch receives the control signal, and according to the control signal profit The load voltage is updated and stablized with the input voltage.
5. voltage control method as claimed in claim 4, it is characterised in that load one electric capacity of parallel connection.
6. voltage control method as claimed in claim 5, it is characterised in that second electronic switch connects an absolute value and produces Device, it is connected an adder with the divider, and the Absolute value generator receives the voltage drop across second electronic switch, and according to This captures the absolute value of the triangular wave signal, and to produce the positive feedback signal to the adder, the divider transmits the feedback Voltage gives the adder, and the adder is added the positive feedback signal and the feedback voltage, to produce the summation signal.
7. voltage control method as claimed in claim 6, it is characterised in that the adder is connected with a target voltage generator One comparison controller, the comparison controller connects first electronic switch and second electronic switch, and the comparison controller is received The target voltage of the target voltage generator generation and the summation signal, by its relatively after, produce the control signal to this One electronic switch, and drive second electronic switch.
8. voltage control method as claimed in claim 7, it is characterised in that when first electronic switch is to open, this second To close, when first electronic switch is to close, second electronic switch is to open to electronic switch.
9. a kind of voltage control method, it is characterised in that comprise the steps of:
The upper load voltage of the load of partial pressure one, to produce a feedback voltage;
The feedback voltage and a periodic triangular ripple signal are added, to produce a summation signal, described periodic triangular ripple news Number it is to capture with the voltage drop of drain electrode via the source electrode of border field-effect transistor once;
The summation signal is compared respectively with the feedback voltage with a target voltage, and in the summation signal and the feedback voltage all During less than the target voltage, one first is produced respectively and controls signal and one second control signal;And
The first control signal and the second control signal are received, and updates using an input voltage and stablize load electricity accordingly Pressure.
10. voltage control method as claimed in claim 9, it is characterised in that the first control signal and the second control news Number it is all high levle signal.
11. voltage control methods as claimed in claim 9, it is characterised in that receive this first control signal with this second Control signal, and using the input voltage update and stablize in the step of the load voltage accordingly, comprise the steps of:
The first control signal and the second control signal are received, and mutually therewith, to produce one the 3rd signal is controlled;And receive 3rd control signal, and the load voltage is updated using the input voltage and stablized accordingly.
12. voltage control methods as claimed in claim 11, it is characterised in that the 3rd controls signal for high levle signal.
13. voltage control methods as claimed in claim 12, it is characterised in that the load connects a divider, and it is partial pressure The load voltage, to produce the feedback voltage.
14. voltage control methods as claimed in claim 13, it is characterised in that load connection one first electronic switch and Second electronic switch, the second electronic switch ground connection, first electronic switch is connected a controller with second electronic switch, its System's connection one and the output end of door, should be connecteds a first comparator and one second comparator with the input of door, and this first compares Device receives the target voltage and the summation signal, and by its relatively after, produce the first control signal, second comparator is received The target voltage and the feedback voltage, and by its relatively after, produce the second control signal, the first control news should be received with door Number with the second control signal, and be multiplied it, to produce the 3rd control signal, the controller receives the 3rd control signal, And drive first electronic switch that the load voltage is updated and stablized using the input voltage with second electronic switch accordingly.
15. voltage control methods as claimed in claim 14, it is characterised in that load one electric capacity of parallel connection.
16. voltage control methods as claimed in claim 15, it is characterised in that second electronic switch is connected with the divider One addition process device, the addition process device receives the feedback voltage with being somebody's turn to do that the voltage drop across second electronic switch is formed Triangular wave signal, to produce the summation signal.
17. voltage control methods as claimed in claim 16, it is characterised in that the addition process device and a target voltage are produced Device connects the first comparator, and it is to receive the target voltage produced by the target voltage generator, and the divider connection should Second comparator and the target voltage generator.
18. voltage control methods as claimed in claim 17, it is characterised in that when first electronic switch is to open, this To close, when first electronic switch is to close, second electronic switch is to open to two electronic switches.
CN201410201529.XA 2014-05-13 2014-05-13 voltage control method CN105094194B (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6362604B1 (en) * 1998-09-28 2002-03-26 Alpha-Omega Power Technologies, L.L.C. Electrostatic precipitator slow pulse generating circuit
JP2007109267A (en) * 2007-01-31 2007-04-26 Ricoh Co Ltd Voltage regulator
CN101051233A (en) * 2006-04-05 2007-10-10 通嘉科技股份有限公司 Voltage regulating circuit and voltage regulating method for preventing input voltage sudden fall
CN101809854A (en) * 2007-09-25 2010-08-18 万国半导体有限公司 Voltage/current control apparatus and method
CN102339082A (en) * 2010-07-22 2012-02-01 日隆电子股份有限公司 Power level control circuit

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITVA20020038A1 (en) * 2002-05-30 2003-12-01 St Microelectronics Srl Voltage regulator
JP4489485B2 (en) * 2004-03-31 2010-06-23 株式会社ルネサステクノロジ Semiconductor device
JP4426955B2 (en) * 2004-11-30 2010-03-03 株式会社ルネサステクノロジ Semiconductor device
US7595624B2 (en) * 2005-11-30 2009-09-29 Texas Instruments Incorporated Slope compensation for switching regulator
US7986135B2 (en) * 2008-05-13 2011-07-26 L&L Engineering, Llc Method and systems for conduction mode control
JP5405891B2 (en) * 2009-05-08 2014-02-05 スパンション エルエルシー Power supply device, control circuit, and control method for power supply device
CN102141816B (en) * 2010-10-19 2013-05-15 启攀微电子(上海)有限公司 Current-mode current induction circuit externally connected with MOS (metal oxide semiconductor) and method for realizing current mode
CN103683908B (en) * 2013-12-19 2015-11-25 矽力杰半导体技术(杭州)有限公司 Switching power source control circuit, Switching Power Supply and control method thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6362604B1 (en) * 1998-09-28 2002-03-26 Alpha-Omega Power Technologies, L.L.C. Electrostatic precipitator slow pulse generating circuit
CN101051233A (en) * 2006-04-05 2007-10-10 通嘉科技股份有限公司 Voltage regulating circuit and voltage regulating method for preventing input voltage sudden fall
JP2007109267A (en) * 2007-01-31 2007-04-26 Ricoh Co Ltd Voltage regulator
CN101809854A (en) * 2007-09-25 2010-08-18 万国半导体有限公司 Voltage/current control apparatus and method
CN102339082A (en) * 2010-07-22 2012-02-01 日隆电子股份有限公司 Power level control circuit

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