CN103633836A - Average inductive current type voltage compensation control device and control method thereof - Google Patents
Average inductive current type voltage compensation control device and control method thereof Download PDFInfo
- Publication number
- CN103633836A CN103633836A CN201210299698.2A CN201210299698A CN103633836A CN 103633836 A CN103633836 A CN 103633836A CN 201210299698 A CN201210299698 A CN 201210299698A CN 103633836 A CN103633836 A CN 103633836A
- Authority
- CN
- China
- Prior art keywords
- valley point
- current
- voltage
- resistance
- average
- 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.)
- Granted
Links
Images
Landscapes
- Dc-Dc Converters (AREA)
Abstract
The invention discloses an average inductive current type voltage compensation control device and a control method thereof, the control device comprising a valley voltage sample-hold unit and a reference voltage generator which are connected with each other. The valley voltage sample-hold unit is connected to an inductor in a DC-to-DC converter, and an electronic switch in the DC-to-DC converter is connected to the reference voltage generator. The valley voltage sample-hold unit obtains average valley voltage of at least two adjacent time points on the inductor. The reference voltage generator receives doubled external voltage of an average inductive current of a corresponding doubled inductor, so as to subtract the valley voltage from the doubled external voltage and generate a reference voltage to control the electronic switch. Thus, a peak current on the inductor remains constant, and the impact of the inductor in the converter is avoided at the same time.
Description
Technical field
The present invention is relevant a kind of control technology, particularly about a kind of average inductor current formula voltage compensation device and control method thereof.
Background technology
Electric pressure converter is broadly divided into several according to type difference, and stream (AC/AC) transducer is delivered in interchange, interchange turns direct current (AC/DC) transducer, DC-DC (DC/DC) transducer and direct current and delivers stream (DC/AC); Wherein, with regard to DC-DC (DC/DC) transducer, in many electronic circuits, often there are some electronic components to need Power supply more than duplicate supply, such as liquid crystal display, voltage comparator, operational amplifier etc., or due to the different demands that have many group different potentials of operating voltage of organizing electronic components, now just needing has DC-DC transducer to obtain the voltage of wanting more.
As shown in Figure 1, DC-DC transducer 10 comprises an electric capacity 12, a diode 14, an inductance 16, a transistor switch 18 and a resistance 20, and wherein the on off state of transistor switch 18 is controlled by a feedback controller 22.In transistor switch 18 conductings (ON) stage, input power 24 has electric current and flows through inductance 16, and energy is stored on inductance 16; And when transistor switch 18 receives pick-off signal, transistor switch 18 cut-off (OFF), now the induced electricity on inductance 16 fails to be convened for lack of a quorum and is discharged on resistance 20 output with stable maintenance voltage.Feedback controller 22 can be detected the electric current on inductance 16, and removes thus to control transistor switch 18, and wherein feedback controller 22 produces the control signal that is used for controlling transistor switch 18, with current waveform on inductance 16 as shown in Figure 2.In the waveform of inductive current, its crest current value equals two times of average inductor current values and deducts trough current value, and in above-mentioned control signal, the time interval of low level voltage is fixed.Utilize above-mentioned negative feedback control mode, when input power 24 is increased to hundreds of volts, crest current value and trough current value will no longer keep fixing and produce change, and for fixing average inductor current, when trough current value is lower, crest current value is higher; When trough current value is higher, crest current value is lower.In addition, measure waveform as shown in Figure 3, wherein dotted line waveform is the source voltage waveform of transistor switch 18, and its below is sequentially current waveform and the inductive current waveform by diode string 26.Hence one can see that, and the peak value of inductive current and valley are continuous earthquakes.
Therefore, the present invention is in the puzzlement for above-mentioned, proposes a kind of average inductor current formula voltage compensation device and control method thereof, to solve the existing problem being produced.
Summary of the invention
Main purpose of the present invention, be to provide a kind of average inductor current formula voltage compensation device and control method thereof, it is an average valley point voltage that utilizes at least two adjacent time points on inductance, two times of external voltages with the average inductor current of corresponding two times of inductance, with the peak current on fixed inductance, and need not respond to the induced current of high voltage end (high side), and avoid being subject to the separate inductor impact in DC-DC converter, to improve the accuracy of voltage adjustment. simultaneously
For reaching above-mentioned purpose, the invention provides a kind of average inductor current formula voltage compensation device, comprise a valley point voltage sampling keeping unit, connect the inductance in a DC-DC converter, and at least two valley point currents of at least two adjacent time points on receiving inductance, and be converted into an average valley point voltage.Valley point voltage sampling keeping unit is connected a reference voltage generator with the electronic switch in DC-DC converter simultaneously, it is and receives two times of external voltages of the average inductor current of corresponding two times of inductance, to be deducted average valley point voltage, produce a reference voltage and control electronic switch, to make thus the peak current on inductance keep definite value.
Wherein, the DC-DC converter that described DC-DC converter is firm deadline.
Wherein, more comprise a comparator, it is to connect described inductance, described valley point voltage sampling keeping unit, described reference voltage generator and described electronic switch, to receive the inductive drop of described reference voltage and described inductance, and according to its comparative result, control described electronic switch, to make thus described peak current keep described definite value.
Wherein, when described reference voltage is identical with described inductive drop, electronic switch described in described comparator conducting, to make thus described peak current reach described definite value.
Wherein, when described reference voltage is identical with described inductive drop, described comparator is closed described electronic switch.
Wherein, described two valley point currents comprise respectively corresponding first, after one first valley point current and one second valley point current of described time point, the summation of described average valley point voltage is respectively corresponding described the first valley point current and described the second valley point current one the first half valley point voltage and one the second half valley point voltage, and described valley point voltage sampling keeping unit more comprises:
One first sequence switch, connects described inductance, and in the temporary transient conducting of described two adjacent time point, to pass through for described the first valley point current and described the second valley point current respectively;
One first valley point voltage holding unit, connects described the first sequence switch, to receive described the first valley point current or described the second valley point current, and is converted into respectively described the first half valley point voltages or described the second half valley point voltages, and keeps its output;
One second sequence switch, connects described the first valley point voltage holding unit, and between described two adjacent time points, and described inductive current is when decline gradually, temporary transient conducting, the transfer path of usining as described the first half valley point voltages; And
One second valley point voltage holding unit, connects described the second sequence switch, to receive described the first half valley point voltages, and keeps its output.
Wherein, described the first valley point voltage holding unit more comprises:
One first amplifier, connects described the first sequence switch, to receive described the first valley point current or described the second valley point current, exports respectively one first Continuity signal or one second Continuity signal;
One the first transistor switch, connects described the first amplifier and described reference voltage generator, and receives described the first Continuity signal or described the second Continuity signal to keep conducting;
One first electric capacity, one end ground connection, the other end connects described the first sequence switch and described the first amplifier; And
One first resistance, one end ground connection, the other end connects described the first transistor switch and described the first amplifier, described the first electric capacity and described the first resistance receive described the first valley point current or described the second valley point current by described the first sequence switch, and be converted into described the first half valley point voltages or described the second half valley point voltages, to keep described the first half valley point voltages of output or described the second half valley point voltages by described the first transistor switch; And
Described the second valley point voltage holding unit more comprises:
One second amplifier, connects described the second sequence switch, to receive described the first half valley point voltages, exports one the 3rd Continuity signal;
One transistor seconds switch, connects described the second amplifier and described reference voltage generator, and receives described the 3rd Continuity signal to keep conducting;
One second electric capacity, one end ground connection, the other end connects described the second sequence switch and described the second amplifier; And
One second resistance, one end ground connection, the other end connects described transistor seconds switch and described the second amplifier, described the second resistance is identical with the resistance of described the first resistance, described the second electric capacity and described the second resistance receive described the first half valley point voltages by described the second sequence switch, to keep described the first half valley point voltages of output by described transistor seconds switch.
Wherein, described reference voltage generator more comprises:
One the 3rd amplifier, receives described two times of external voltages, to produce one the 4th Continuity signal;
One the 3rd resistance, its resistance is half of described the first resistance, one end ground connection of described the 3rd resistance, the other end connects described the 3rd amplifier;
One the 3rd transistor switch, connects described the 3rd amplifier and described the 3rd resistance, to receive described the 4th Continuity signal, and by described the 3rd resistance, produces two times of described average inductor current of flow through described the 3rd transistor switch and described the 3rd resistance;
One current mirror, connects described the 3rd transistor switch; And
One the 4th resistance, its resistance is identical with described the 3rd resistance, one end ground connection of described the 4th resistance, the other end connects described current mirror, described current mirror copies described two times of described average inductor current, to produce two times of described average inductor current by described the 4th resistance, and produces accordingly described two times of external voltages, to be deducted described 2 half valley point voltages, produce described reference voltage.
Wherein, more comprise time schedule controller, it is to connect described the first sequence switch, described the second sequence switch and described inductance, and at the first sequence switch described in the temporary transient conducting of described two adjacent time point, and between described two adjacent time points, and when described inductive current declines gradually, the second sequence switch described in temporary transient conducting.
Wherein, described time point and described valley point current are all when a plurality of, and described average valley point voltage is that the summation of the valley point voltage that valley point current is corresponding described in each is average.
The present invention also provides a kind of average inductor current formula voltage compensation method, and it is to control a DC-DC converter, and this DC-DC converter comprises an electronic switch and an inductance.First, receive two times of external voltages of average inductor current and at least two valley point currents of at least two adjacent time points on inductance of corresponding two times of inductance, and at least two valley point currents are converted to an average valley point voltage.Then, two times of external voltages are deducted to average valley point voltage, to export a reference voltage of controlling electronic switch.
Wherein, more comprise a step, it is the inductive drop that receives described reference voltage and described inductance, and according to its comparative result, controls described electronic switch, to make thus the peak current on described inductance keep definite value.
Wherein, described comparative result is described reference voltage when identical with described inductive drop, and described electronic switch cuts out.
Wherein, described comparative result is described reference voltage and described inductive drop when different, and described electronic switch conducting, to make thus described peak current keep described definite value.
Wherein, the DC-DC converter that described DC-DC converter is firm deadline.
Wherein, described time point and described valley point current are all when a plurality of, and described average valley point voltage is that the summation of the valley point voltage that valley point current is corresponding described in each is average.
Hereby, for making your juror more have further understanding and understanding to architectural feature of the present invention and the effect reached, sincerely help with preferred embodiment figure and coordinate detailed explanation, illustrating as rear:
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the DC-DC converter of prior art;
Fig. 2 is the inductive current and the voltage oscillogram of controlling transistor switch of prior art;
Fig. 3 is source voltage, diode crosstalk stream and the inductive current oscillogram of the transistor switch of prior art;
Fig. 4 is the control device circuit diagram of reception two valley point currents of the present invention;
Fig. 5 is inductive current of the present invention and the voltage oscillogram of controlling transistor switch;
Fig. 6 is transistorized source voltage of the present invention, diode crosstalk stream and inductive current oscillogram;
Fig. 7 is the control device circuit diagram of a plurality of valley point currents of reception of the present invention.
Description of reference numerals: 10-DC-DC transducer; 12-electric capacity; 14-diode; 16-inductance; 18-transistor switch; 20-resistance; 22-feedback controller; 24-input power; 26-diode string; 28-DC-DC converter; 30-inductance; 32-transistor switch; 34-valley point voltage sampling keeping unit; 36-reference voltage generator; 37-valley point voltage sampling keeping unit; 38-comparator; 40-diode string; 42-the first sequence switch; 44-the first valley point voltage holding unit; 46-the second sequence switch; 48-the second valley point voltage holding unit; 49-time schedule controller; 50-the first amplifier; 52-the first transistor switch; 54-the first electric capacity; 56-the first resistance; 58-the second amplifier; 60-transistor seconds switch; 62-the second electric capacity; 64-the second resistance; 66-the 3rd amplifier; 68-the 3rd resistance; 70-the 3rd transistor switch; 72-current mirror; 74-the 4th resistance.
Embodiment
Because inductance ripple current is subject to that valley inductor current adds peak inductive current summation, half is controlled, and this represent that peak inductive current Ipeak equals two times of average inductor current Iavg to cut valley inductor current Ivally, as the formula (1).But the present invention is for fixed peak inductor current Ipeak, therefore above-mentioned valley inductor current Ivally is revised as to valley inductor current Iv1, Iv2 average of adjacent at least two time points, as the formula (2), the change of valley inductor current Ivally is counted avoiding.According to above-mentioned principle, the present invention is by two times of external voltage Vext of the average inductor current of corresponding two times of inductance, deduct the valley point voltage Vh1 of at least two adjacent time points on inductance, the mean value of Vh2, this mean value is the average valley point voltage of valley point voltage Vh1, Vh2, after subtracting each other, can obtain a reference voltage Vref, fixed peak inductor current Ipeak as the formula (3), and accordingly.
Ipeak=2*Iavg-Ivally (1)
Ipeak=2*Iavg-（Iv1+Iv2）/2 (2)
Vref＝2*Vext-(Vh1+Vh2)/2 (3)
Below refer to Fig. 4.The present invention connects the DC-DC converter 28 of a firm deadline, wherein comprises an inductance 30 and an electronic switch, and in the present embodiment, this electronic switch be take transistor switch 32 as example.The present invention comprises a valley point voltage sampling keeping unit 34 and a reference voltage generator 36, valley point voltage sampling keeping unit 34 connects inductance 30 by transistor switch 32, and at least two valley point currents of at least two adjacent time points on receiving inductance 30, and be converted into an average valley point voltage.Reference voltage generator 36 connects valley point voltage sampling keeping unit 28 and transistor switch 32, and receives two times of external voltage Vext of the average inductor current Iave of corresponding two times of inductance 30, to be deducted average valley point voltage, produces a reference voltage Vref.Inductance 30, valley point voltage sampling keeping unit 34, reference voltage generator 36 are all connected a comparator 38 with transistor switch 32, it is the inductive drop that receives reference voltage Vref and inductance 30, and according to its comparative result, control transistor switch 32, to make thus peak current keep definite value.
In other words, operation of the present invention is as follows.First, reference voltage generator 36 receives two times of external voltage Vext of the average inductor current Iave of corresponding two times of inductance 30, simultaneously, at least two valley point currents of at least two adjacent time points on valley point voltage sampling keeping unit 34 receiving inductances 30, and at least two valley point currents are converted to an average valley point voltage.Then, reference voltage generator 36 deducts average valley point voltage by two times of external voltage Vext that receive, to produce the reference voltage Vref of controlling transistor switch 32.Finally, comparator 38 receives the inductive drop of reference voltage Vref and inductance 30, and according to its comparative result, controls transistor switch 32, to make thus the peak current on inductance 30 keep definite value.For instance, when comparative result is reference voltage when identical with inductive drop, make transistor switch 32 close; When comparative result is reference voltage and inductive drop when different, make transistor switch 32 conductings.Comparator 38 produces the control signal that is used for controlling transistor switch 32, with current waveform on inductance 30 as shown in Figure 5, wherein the time interval of the high levle voltage of control signal is for fixing, the peak current on inductance 30 and valley point current also become fixing.In addition, measure waveform as shown in Figure 6, wherein dotted line waveform is the source voltage waveform of transistor switch 32, and its below is sequentially by the current waveform of diode string 40 and the current waveform of inductance 30.Hence one can see that, the peak value of inductive current and valley be presented fixing.Thus, the present invention just can respond to the induced current of high voltage end (high side), and avoids being subject to the separate inductor impact in DC-DC converter, the accuracy of adjusting to improve voltage simultaneously.
At said process, if the present invention lacks comparator 38, also can omit the inductive drop of above-mentioned reception reference voltage Vref and inductance 30, and according to its comparative result, control the step of transistor switch 32.
Please continue to refer to Fig. 4, the physical circuit of valley point voltage sampling keeping unit 34 and reference voltage generator 36 will be continued to describe below.
Above-mentioned two valley point currents comprise respectively corresponding first, after one first valley point current and one second valley point current of time point, the summation of average valley point voltage is corresponding the first valley point current of difference and the second valley point current one the first half valley point voltage and one the second half valley point voltage.Valley point voltage sampling keeping unit 36 only comprises two sub-valley point voltage sampling keeping units 37 at this, to capture respectively the first half valley point voltages and the second half valley point voltages.Wherein a sub-valley point voltage sampling keeping unit 37 more comprises one first sequence switch 42 and one first valley point voltage holding unit 44, and another sub-valley point voltage sampling keeping unit 37 more comprises one second sequence switch 46 and one second valley point voltage holding unit 48.The first sequence switch 42 connects inductance 30, and in the temporary transient conducting of two adjacent time points, to pass through for the first valley point current and the second valley point current respectively.The first sequence switch 42 connects the first valley point voltage holding units 44, and it is to receive the first valley point current or the second valley point currents from the first sequence switch 42, and is converted into respectively the first half valley point voltages or the second half valley point voltages, and keeps its output.The first valley point voltage holding unit 44 connects the second sequence switches 46, and it is between two adjacent time points, and inductive current is when decline gradually, temporary transient conducting, the transfer path of usining as the first half valley point voltages.The second sequence switch 46 connects the second valley point voltage holding units 48, and it is to receive the first half valley point voltages from the second sequence switch 46, and keeps its output.
The conducting state of the first sequence switch 42, the second sequence switch 46 is controlled by time schedule controller 49.The first sequence switch 42, the second sequence switch 46 are connected this time schedule controller 49 with inductance 30, it is at temporary transient conducting the first sequence switch 42 of two adjacent time points, and between two adjacent time points, and inductive current is when decline gradually, temporary transient conducting the second sequence switch 46.
The first valley point voltage holding unit 44 more comprises one first amplifier 50, and it is to connect the first sequence switch 42, to receive the first valley point current or the second valley point current, exports respectively one first Continuity signal or one second Continuity signal.The first amplifier 50 is connected a first transistor switch 52 with reference voltage generator 34, it is to receive the first Continuity signal or the second Continuity signal to keep conducting.One end ground connection that separately has one first electric capacity 54 and one first resistance 56, the first electric capacity 54, the other end connects the first sequence switch 42 and the first amplifier 50.One end ground connection of the first resistance 56, the other end connects the first transistor switch 52 and the first amplifier 50, the first electric capacity 54 and the first resistance 56 receive the first valley point current or the second valley point current by the first sequence switch 42, and be converted into the first half valley point voltages or the second half valley point voltages, to keep output the first half valley point voltages or the second half valley point voltages by the first transistor switch 52.
The second valley point voltage holding unit 48 more comprises one second amplifier 58, and it is to connect the second sequence switch 46, to receive the first half valley point voltages, exports one the 3rd Continuity signal.The second amplifier 58 is connected a transistor seconds switch 60 with reference voltage generator 34, it is to receive the 3rd Continuity signal to keep conducting.One end ground connection that separately has one second electric capacity 62 and one second resistance 64, the second electric capacity 62, the other end connects the second sequence switch 46 and the second amplifier 58.One end ground connection of the second resistance 64, the other end connects transistor seconds switch 60 and the second amplifier 58, the second resistance 64 is identical with the resistance of the first resistance 62, the second electric capacity 62 and the second resistance 64 receive the first half valley point voltages by the second sequence switch 46, to keep output the first half valley point voltages by transistor seconds switch 60.
Above-described embodiment only receives two valley point currents to form average valley point voltage, below refers to the 7th figure, and this embodiment and above-described embodiment difference is, valley point voltage sampling keeping unit 36 comprises a plurality of sub-valley point voltage sampling keeping units 37 at this.Therefore, in this embodiment, a plurality of valley point currents of a plurality of adjacent time points on valley point voltage sampling keeping unit 36 receiving inductances, and be converted into an average valley point voltage, make this average valley point voltage Vave for the summation of valley point voltage Vhn corresponding to each valley point current average, as the formula (4).Another remaining circuit framework and start thereof are all identical with previous embodiment, in this, repeat no more.
Vave=(Vh1+Vh2+...+Vhn)/n (4)
In sum, the present invention adopts the inductance valley point current of adjacent two time points, with fixed inductance peak current, and then the accuracy of raising DC-DC converter.
As described above, it is only a preferred embodiment of the present invention, not be used for limiting scope of the invention process, therefore the equalization of such as doing according to the shape described in the present patent application the scope of the claims, structure, feature and spirit changes and modifies, all should be included in claim of the present invention.
Claims (16)
1. an average inductor current formula voltage compensation device, is characterized in that, it is to connect a DC-DC converter, and described average inductor current formula voltage compensation device comprises:
One valley point voltage sampling keeping unit, connects the inductance in described DC-DC converter, and receives at least two valley point currents of at least two adjacent time points on described inductance, and is converted into an average valley point voltage; And
One reference voltage generator, connect the electronic switch in described valley point voltage sampling keeping unit and described DC-DC converter, and two times of external voltages of the average inductor current of the corresponding two times of described inductance of reception, to be deducted described average valley point voltage, produce a reference voltage and control described electronic switch, to make thus the peak current on described inductance keep definite value.
2. average inductor current formula voltage compensation device according to claim 1, is characterized in that the DC-DC converter that described DC-DC converter is firm deadline.
3. average inductor current formula voltage compensation device according to claim 1, it is characterized in that, more comprise a comparator, it is to connect described inductance, described valley point voltage sampling keeping unit, described reference voltage generator and described electronic switch, to receive the inductive drop of described reference voltage and described inductance, and according to its comparative result, control described electronic switch, to make thus described peak current keep described definite value.
4. average inductor current formula voltage compensation device according to claim 3, is characterized in that, when described reference voltage is identical with described inductive drop, electronic switch described in described comparator conducting, to make thus described peak current reach described definite value.
5. average inductor current formula voltage compensation device according to claim 3, is characterized in that, when described reference voltage is identical with described inductive drop, described comparator is closed described electronic switch.
6. average inductor current formula voltage compensation device according to claim 1, it is characterized in that, described two valley point currents comprise respectively corresponding first, after one first valley point current and one second valley point current of described time point, the summation of described average valley point voltage is respectively corresponding described the first valley point current and described the second valley point current one the first half valley point voltage and one the second half valley point voltage, and described valley point voltage sampling keeping unit more comprises:
One first sequence switch, connects described inductance, and in the temporary transient conducting of described two adjacent time point, to pass through for described the first valley point current and described the second valley point current respectively;
One first valley point voltage holding unit, connects described the first sequence switch, to receive described the first valley point current or described the second valley point current, and is converted into respectively described the first half valley point voltages or described the second half valley point voltages, and keeps its output;
One second sequence switch, connects described the first valley point voltage holding unit, and between described two adjacent time points, and described inductive current is when decline gradually, temporary transient conducting, the transfer path of usining as described the first half valley point voltages; And
One second valley point voltage holding unit, connects described the second sequence switch, to receive described the first half valley point voltages, and keeps its output.
7. average inductor current formula voltage compensation device according to claim 6, is characterized in that, described the first valley point voltage holding unit more comprises:
One first amplifier, connects described the first sequence switch, to receive described the first valley point current or described the second valley point current, exports respectively one first Continuity signal or one second Continuity signal;
One the first transistor switch, connects described the first amplifier and described reference voltage generator, and receives described the first Continuity signal or described the second Continuity signal to keep conducting;
One first electric capacity, one end ground connection, the other end connects described the first sequence switch and described the first amplifier; And
One first resistance, one end ground connection, the other end connects described the first transistor switch and described the first amplifier, described the first electric capacity and described the first resistance receive described the first valley point current or described the second valley point current by described the first sequence switch, and be converted into described the first half valley point voltages or described the second half valley point voltages, to keep described the first half valley point voltages of output or described the second half valley point voltages by described the first transistor switch; And
Described the second valley point voltage holding unit more comprises:
One second amplifier, connects described the second sequence switch, to receive described the first half valley point voltages, exports one the 3rd Continuity signal;
One transistor seconds switch, connects described the second amplifier and described reference voltage generator, and receives described the 3rd Continuity signal to keep conducting;
One second electric capacity, one end ground connection, the other end connects described the second sequence switch and described the second amplifier; And
One second resistance, one end ground connection, the other end connects described transistor seconds switch and described the second amplifier, described the second resistance is identical with the resistance of described the first resistance, described the second electric capacity and described the second resistance receive described the first half valley point voltages by described the second sequence switch, to keep described the first half valley point voltages of output by described transistor seconds switch.
8. average inductor current formula voltage compensation device according to claim 7, is characterized in that, described reference voltage generator more comprises:
One the 3rd amplifier, receives described two times of external voltages, to produce one the 4th Continuity signal;
One the 3rd resistance, its resistance is half of described the first resistance, one end ground connection of described the 3rd resistance, the other end connects described the 3rd amplifier;
One the 3rd transistor switch, connects described the 3rd amplifier and described the 3rd resistance, to receive described the 4th Continuity signal, and by described the 3rd resistance, produces two times of described average inductor current of flow through described the 3rd transistor switch and described the 3rd resistance;
One current mirror, connects described the 3rd transistor switch; And
One the 4th resistance, its resistance is identical with described the 3rd resistance, one end ground connection of described the 4th resistance, the other end connects described current mirror, described current mirror copies described two times of described average inductor current, to produce two times of described average inductor current by described the 4th resistance, and produces accordingly described two times of external voltages, to be deducted described 2 half valley point voltages, produce described reference voltage.
9. average inductor current formula voltage compensation device according to claim 6, it is characterized in that, more comprise time schedule controller, it is to connect described the first sequence switch, described the second sequence switch and described inductance, and at the first sequence switch described in the temporary transient conducting of described two adjacent time point, and between described two adjacent time points, and described inductive current is when decline gradually, the second sequence switch described in temporary transient conducting.
10. average inductor current formula voltage compensation device according to claim 1, is characterized in that, described time point and described valley point current are all when a plurality of, and described average valley point voltage is that the summation of the valley point voltage that valley point current is corresponding described in each is average.
11. 1 kinds of average inductor current formula voltage compensation methods, it is characterized in that, it is to control a DC-DC converter, and described DC-DC converter comprises an electronic switch and an inductance, and described average inductor current formula voltage compensation method comprises the following step:
Receive two times of external voltages of average inductor current and at least two valley point currents of at least two adjacent time points on described inductance of corresponding two times of described inductance, and described at least two valley point currents are converted to an average valley point voltage; And
Described two times of external voltages are deducted to described average valley point voltage, to export a reference voltage of controlling described electronic switch.
12. average inductor current formula voltage compensation methods according to claim 11, it is characterized in that, more comprise a step, it is the inductive drop that receives described reference voltage and described inductance, and according to its comparative result, control described electronic switch, to make thus the peak current on described inductance keep definite value.
13. average inductor current formula voltage compensation methods according to claim 12, is characterized in that, described comparative result is described reference voltage when identical with described inductive drop, and described electronic switch cuts out.
14. average inductor current formula voltage compensation methods according to claim 12, it is characterized in that, described comparative result is described reference voltage and described inductive drop when different, and described electronic switch conducting, to make thus described peak current keep described definite value.
15. average inductor current formula voltage compensation methods according to claim 11, is characterized in that the DC-DC converter that described DC-DC converter is firm deadline.
16. average inductor current formula voltage compensation methods according to claim 11, it is characterized in that, described time point and described valley point current are all when a plurality of, and described average valley point voltage is that the summation of the valley point voltage that valley point current is corresponding described in each is average.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210299698.2A CN103633836B (en) | 2012-08-21 | 2012-08-21 | Average inductor current formula voltage compensation device and control method thereof |
| TW101131750A TWI478476B (en) | 2012-08-21 | 2012-08-31 | Compensation of average inductor current control using variable reference voltage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210299698.2A CN103633836B (en) | 2012-08-21 | 2012-08-21 | Average inductor current formula voltage compensation device and control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103633836A true CN103633836A (en) | 2014-03-12 |
| CN103633836B CN103633836B (en) | 2015-10-21 |
Family
ID=50214553
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210299698.2A Active CN103633836B (en) | 2012-08-21 | 2012-08-21 | Average inductor current formula voltage compensation device and control method thereof |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN103633836B (en) |
| TW (1) | TWI478476B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111464026A (en) * | 2020-05-22 | 2020-07-28 | 矽力杰半导体技术(杭州)有限公司 | Control circuit and switching converter using same |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101242143A (en) * | 2007-02-08 | 2008-08-13 | 凌力尔特有限公司 | Adaptive output current control for switching circuits |
| CN101286704A (en) * | 2007-04-13 | 2008-10-15 | 凌特公司 | Determining average output current in dc-dc converter |
| US20090066301A1 (en) * | 2007-09-07 | 2009-03-12 | Matsushita Electric Industrial Co., Ltd. | Buck-boost switching regulator |
| US7855539B1 (en) * | 2007-05-14 | 2010-12-21 | National Semiconductor Corporation | Circuit and method for adaptive current limit control in a power converter |
| CN102026443A (en) * | 2009-09-18 | 2011-04-20 | 立锜科技股份有限公司 | Average current regulator and driver circuit thereof and method for regulating average current |
| CN102104334A (en) * | 2009-12-18 | 2011-06-22 | 凌特公司 | Clean transition between CCM and DCM in valley current mode control of DC-to-DC converter |
| CN102324848A (en) * | 2005-04-18 | 2012-01-18 | 凌特公司 | Switching regulaor and control method thereof |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7279869B2 (en) * | 2005-05-06 | 2007-10-09 | Aimtron Technology Corp. | PFM control circuit for DC regulator |
| US7768246B2 (en) * | 2006-07-27 | 2010-08-03 | Richtek Technology Corp. | Output ripple control circuit and method for a PWM system |
| US7439716B2 (en) * | 2006-09-12 | 2008-10-21 | Semiconductor Components Industries, L.L.C. | DC-DC converter and method |
| US7710084B1 (en) * | 2008-03-19 | 2010-05-04 | Fairchild Semiconductor Corporation | Sample and hold technique for generating an average of sensed inductor current in voltage regulators |
-
2012
- 2012-08-21 CN CN201210299698.2A patent/CN103633836B/en active Active
- 2012-08-31 TW TW101131750A patent/TWI478476B/en active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102324848A (en) * | 2005-04-18 | 2012-01-18 | 凌特公司 | Switching regulaor and control method thereof |
| CN101242143A (en) * | 2007-02-08 | 2008-08-13 | 凌力尔特有限公司 | Adaptive output current control for switching circuits |
| CN101286704A (en) * | 2007-04-13 | 2008-10-15 | 凌特公司 | Determining average output current in dc-dc converter |
| US7855539B1 (en) * | 2007-05-14 | 2010-12-21 | National Semiconductor Corporation | Circuit and method for adaptive current limit control in a power converter |
| US20090066301A1 (en) * | 2007-09-07 | 2009-03-12 | Matsushita Electric Industrial Co., Ltd. | Buck-boost switching regulator |
| CN102026443A (en) * | 2009-09-18 | 2011-04-20 | 立锜科技股份有限公司 | Average current regulator and driver circuit thereof and method for regulating average current |
| CN102104334A (en) * | 2009-12-18 | 2011-06-22 | 凌特公司 | Clean transition between CCM and DCM in valley current mode control of DC-to-DC converter |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111464026A (en) * | 2020-05-22 | 2020-07-28 | 矽力杰半导体技术(杭州)有限公司 | Control circuit and switching converter using same |
| CN111464026B (en) * | 2020-05-22 | 2022-01-07 | 矽力杰半导体技术(杭州)有限公司 | Control circuit and switching converter using same |
Also Published As
| Publication number | Publication date |
|---|---|
| TWI478476B (en) | 2015-03-21 |
| CN103633836B (en) | 2015-10-21 |
| TW201409913A (en) | 2014-03-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102651604B (en) | Control circuit and method of ripple regulator | |
| CN104956580B (en) | In Asynchronous Mode using synchronous converter with prevent battery charge during electric current it is reverse | |
| US20140016381A1 (en) | Current detecting circuit, controlling circuit and power conversion circuit | |
| US20130201731A1 (en) | Power factor correction device, and controller and thd attenuator used by same | |
| CN102790519B (en) | Soft start Apparatus and method in delayed electric power converter | |
| CN105375798A (en) | Self-adaptive sampling circuit, primary side feedback constant voltage system and switching power supply system | |
| JP2011030394A (en) | Charge pump circuit, and method for controlling operation thereof | |
| CN102427638A (en) | Constant-current LED drive circuit, LED drive device and control method thereof | |
| US9000735B2 (en) | DC-DC controller and operation method thereof | |
| CN103675404B (en) | Sensing and the methods, devices and systems for adjusting the inductor current in inductor | |
| CN102195461B (en) | DC-DC soft starting control circuit | |
| CN104917377B (en) | DC/DC converter | |
| CN102570434A (en) | Power converter | |
| CN108933529A (en) | Power supply control device and power supply control system | |
| CN105322810B (en) | Power conversion device and protection method thereof when current feedback signal is abnormal | |
| CN103023323B (en) | Average inductive current type voltage control method and variable reference voltage generating device used by method | |
| EP2884643B1 (en) | DC-DC voltage converter and conversion method | |
| CN205160398U (en) | Self -adaptation sampling circuit , printed circuit board , former limit feedback constant voltage system and switching power supply system | |
| CN101471646A (en) | Circuit and method for detecting and controlling signal slope | |
| CN104749426B (en) | Zero cross detection circuit and circuit of power factor correction | |
| JP6710868B2 (en) | Transmitter, receiver, monitoring device, and photovoltaic power generation system | |
| TWM534932U (en) | Power supply device | |
| CN106712513B (en) | Peak current detection circuit and power conversion device | |
| TWI547083B (en) | Control circuit of power converter and related method | |
| CN103687169A (en) | Power supply device and luminaire |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |