CN103208917A - Multi-phase DC-to-DC (Direct Current) conversion controller and control method thereof - Google Patents
Multi-phase DC-to-DC (Direct Current) conversion controller and control method thereof Download PDFInfo
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- CN103208917A CN103208917A CN2012100087082A CN201210008708A CN103208917A CN 103208917 A CN103208917 A CN 103208917A CN 2012100087082 A CN2012100087082 A CN 2012100087082A CN 201210008708 A CN201210008708 A CN 201210008708A CN 103208917 A CN103208917 A CN 103208917A
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Abstract
The invention relates to a multi-phase DC-to-DC (Direct Current) conversion controller and a control method thereof. The multi-phase DC-to-DC conversion controller is used for controlling a plurality of channels of a multi-phase DC-to-DC conversion circuit to provide output voltage. The multi-phase DC-to-DC conversion controller comprises a constant conduction unit, a plurality of pulse width modulation units and a pulse width logic unit. The constant conduction unit determines a generation time point of a conduction signal which represents the preset time according to output voltage. Every pulse width modulation unit generates a pulse width modulation signal, and the pulse width of the pulse width modulation signal is determined according to the current of the plurality of channels and the conduction signal. The pulse width logic unit controls a corresponding channel of the plurality of channels according to pulse width modulation signals generated by the plurality of pulse width modulation units.
Description
Technical field
The present invention relates to a kind of direct current to direct current switching controller and control method thereof, relate in particular to a kind of multiphase DC to direct current switching controller and control method thereof.
Background technology
Along with the evolution of process technique, integrated circuit gets over microminiaturization.And the microminiaturization of integrated circuit can be accompanied by the decline of driving voltage.Yet the not decline of equal proportion along with the decline of driving voltage of the power consumption of the integrated circuit in some field makes the operating current of integrated circuit oppositely increase.
The driving voltage source of integrated circuit is all based on the switched-mode power supply circuit.And the handover operation of switched-mode power supply circuit can cause the output ripple (Ripple) of output.These ripple voltages can seem under the operating environment of low driving voltage obviously, even cause the logic error of integrated circuit.In order to reduce the ripple of switched-mode power supply circuit, multiphase DC commentaries on classics direct current switching controller and develop.Transmit electric power to the mode of DC-to-DC switching circuit output by the multichannel timesharing, can reduce the electric power size of each transmission, thereby reduce the size of ripple.
See also Fig. 1, be the circuit diagram of traditional multiphase DC to-DC switching circuit.The multiphase DC to-DC switching circuit has comprised a controller 10 and three passage 12a～12c.Each passage 12a～12c comprises two transistor switches and is serially connected between input voltage vin and the ground connection.Driver in each passage 12a～12c receives the pulse-width modulation control signal PWM1～PWM3 of self-controller 10 separately, to switch corresponding transistor switch accordingly, so that channel current Io1～Io3 to be provided.Channel current Io1～Io3 in conjunction with and form the output capacitance C charging of output current Io and produce output voltage V out, to drive load Load.Controller 10 by pin to CSP1 and CSN1, CSP2 and CSN2, CSP3 and CSN3 sense channel electric current I o1～Io3 and receive a voltage feedback signal FB, the duty ratio of the transistor switch among modulated channel 12a～12c according to this.
Prior art:
Passage 12a, 12b, 12c
Pulse-width modulation control signal PWM1, PWM2, PWM3
Channel current Io1, Io2, Io3
Output current Io
Output capacitance C
Output voltage V out
Load Load
Pin CSP1, CSN1, CSP2, CSN2, CSP3, CSN3
Voltage feedback signal FB
Input voltage vin
The present invention:
Multiphase DC is to direct current transducer 100
Constant onunit 110,210,310
Pulse-width modulation module 120,220,320
Pulse width logic unit 130,230,330
Comparator 202,302,312,3146
Turn-on control circuit 204
Pulse- width modulation unit 214a, 214b, 214c
P type MOS (metal-oxide-semiconductor) transistor 2141,2142
N-type MOS (metal-oxide-semiconductor) transistor 2143,2144,2145,2146,2147,2148
Gain circuitry 2149
SR latch 304,3147
Trailing edge testing circuit 306,3141
Current source 3142, I1, I2, I3, ION
Electric capacity 3143
Postpone adjustment unit 3144,3145
Switch 3148, SW
Input voltage vin
Pulse-width modulation control signal S1a, S1b, S2a, S2b, S3a, S3b
Channel current Io1, Io2, Io3
Output capacitance C
Output voltage V out
Voltage feedback signal FB
Continuity signal Cs
Pulse-width modulation signal Tock1, Tock2, Tock3
Current detection signal Ise1, Ise2, Ise3
Time capacitor C ON
Reference voltage Vref, Vdt, Vton
Output signal Pon
Time set resistance R ton
Driving power VDD
Set end S
Reset end R
Conducting determines signal Tcs
Inverse output terminal Q '
Summary of the invention
The transient response of multiphase DC commentaries on classics direct current switching controller of the prior art is not good, and the circuit complexity.Multiphase DC of the present invention to the direct current switching controller with constant ON time feedback controling mode, transient response fast is provided, and the mode of utilizing pulsewidth compensation compensates each channel current according to the difference of each channel current, omitted and asked electric current and reach on average, therefore further simplified the design of circuit.
For reaching above-mentioned purpose, the present invention has disclosed a kind of multiphase DC to the direct current switching controller, in order to control a multiphase DC to a plurality of passages in the DC converting circuit so that an output voltage to be provided.Multiphase DC comprises a constant onunit, most individual pulse-width modulation unit and a pulse width logic unit to the direct current switching controller.Constant onunit represents the generation time point of the Continuity signal of a scheduled time with decision according to output voltage.Each pulse-width modulation unit produces a pulse-width modulation signal, and wherein a pulse duration of pulse-width modulation signal is electric current and the Continuity signal decision according to a plurality of passages.Respective channel in a plurality of passages of those pulse-width modulation signal controlling that the pulse width logic unit produces according to most pulse-width modulation unit.
The present invention has also disclosed a kind of multiphase DC to the control method of DC converting circuit, in order to the electric current of balance one multiphase DC to a plurality of passages in the DC converting circuit.Control method comprises step: set a constant ON time 1.; 2. detect the electric current of a plurality of passages to produce a plurality of current detection signals; 3. determine the electric current of respective channel and the current difference of other passages; And most pulse-width modulation signals of 4. generations, to control corresponding passage.Wherein the pulse duration of each pulse-width modulation signal is to determine according to constant ON time and current difference.
Above general introduction and ensuing detailed description are all exemplary in nature, are in order to further specify claim of the present invention.And relevant other objects and advantages of the present invention will be set forth in follow-up explanation and diagram.
Description of drawings
Figure 1 shows that the circuit diagram of traditional multiphase DC to-DC switching circuit.
Figure 2 shows that multiphase DC according to the present invention is to the circuit block diagram of direct current transducer.
Figure 3 shows that according to the multiphase DC of one first preferred embodiment of the present invention circuit diagram to the direct current switching controller.
Figure 4 shows that the circuit diagram of the pulse-width modulation unit among Fig. 3.
Figure 5 shows that according to the multiphase DC of one second preferred embodiment of the present invention circuit diagram to the direct current switching controller.
Figure 6 shows that the circuit diagram of the pulse-width modulation unit among Fig. 5.Main description of reference numerals:
Embodiment
See also Fig. 2, for the circuit block diagram of multiphase DC according to the present invention to direct current transducer, in order to control multiphase DC to DC converting circuit.Multiphase DC comprises passage 150a, 150b, 150c to DC converting circuit, pulse-width modulation control signal S1a, S1b, S2a, S2b, S3a, the S3b that couples an input voltage vin and according to multiphase DC direct current transducer 100 is produced respectively provides channel current Io1, Io2, Io3 to output capacitance C to store, so that an output voltage V out to be provided.Multiphase DC has comprised a constant onunit 110, a pulse-width modulation module 120 and a pulse width logic unit 130 to direct current switching controller 100.Constant onunit 110 is according to receiving a voltage feedback signal FB who represents the output voltage size, and with the generation time point according to output voltage one Continuity signal Cs, wherein Continuity signal Cs is in order to represent the size of constant ON time.Pulse-width modulation module 120 has comprised most pulse-width modulation unit (not drawing), produces most pulse-width modulation signal Tock1, Tock2, Tock3 to control multiphase DC to DC converting circuit.Channel current testing circuit 152a, 152b, 152c couple passage 150a, 150b, 150c respectively, represent current detection signal Ise1, Ise2, the Ise3 of channel current size with sense channel electric current I o1, Io2, Io3 and generation.The corresponding control of pulse-width modulation signal that each pulse-width modulation unit produces multiphase DC is to a passage in the DC converting circuit, and a pulse duration of pulse-width modulation signal to be the Continuity signal Cs that current detection signal Ise1, Ise2, Ise3 and constant onunit 110 according to these passages produce decide.Pulse-width modulation signal Tock1, Tock2, the Tock3 that pulse width logic unit 130 produces according to most pulse-width modulation unit produces pulse-width modulation control signal S1a, S1b, S2a, S2b, S3a, S3b and controls respective channel 150a, 150b, 150c.
Because pulse-width modulation module 120 can be judged each other difference according to channel current Io1, Io2, Io3, and adjust the length of the constant ON time of Continuity signal Cs representative according to current difference, make the duty ratio of pulse-width modulation control signal S1a that pulse width logic unit 130 produces, S1b, S2a, S2b, S3a, S3b can the adjustment of respective channel electric current, make more convergence unanimity of each channel current.Then, see also following embodiment, with further understanding the present invention.
See also Fig. 3, for according to the multiphase DC of one first preferred embodiment of the present invention circuit diagram to the direct current switching controller.Multiphase DC has comprised a constant onunit 210, a pulse-width modulation module 220 and a pulse width logic unit 230 to the direct current switching controller.Constant onunit 210 comprises a comparator 202, a turn-on control circuit 204 and a time capacitor C ON.One non-inverting input of comparator 202 receives a reference voltage Vref, and a reverse input end receives voltage feedback signal FB.When the accurate position of voltage feedback signal FB was lower than the accurate position of reference voltage Vref, the output signal Pon of comparator 202 was to turn-on control circuit 204.Turn-on control circuit 204 is set the electric current beginning with one time capacitor C ON is charged to produce Continuity signal Cs when receiving the output signal Pon of comparator 202.Wherein, set electric current and can set according to external time setting resistance R ton, so, the user can set multiphase DC to the length of the constant ON time of direct current switching controller according to the environment of practical application circuit.
Pulse-width modulation module 220 comprises pulse- width modulation unit 214a, 214b, 214c, receive Continuity signal Cs, and the difference of judging corresponding passage and other channel currents according to current detection signal Ise1, Ise2, Ise3 separately makes the pulse duration of pulse-width modulation signal Tock1, Tock2, Tock3 to adjust along with the channel current of correspondence and the difference between other channel currents to produce pulse-width modulation signal Tock1, Tock2, Tock3.Pulse width logic unit 230 couples pulse-width modulation module 220, produces pulse-width modulation control signal S1a, S1b, S2a, S2b, S3a, S3b according to pulse-width modulation signal Tock1, Tock2, Tock3.Turn-on control circuit 204 in the constant onunit 210 receives pulse-width modulation control signal S1a, S2a, S3a, to time capacitor C ON discharge, the accurate position of Continuity signal Cs is reset to zero potential with accordingly.Pulse width logic unit 230 can receive the output signal Pon of comparator 202, decides with the number of times according to output signal Pon this time to produce the passage which group pulse-width modulation control signal is come the conducting correspondence.So, can reach timesharing control multiphase DC to a plurality of passages of DC converting circuit.
Then, see also Fig. 4, be the circuit diagram of the pulse-width modulation unit among Fig. 3.Because the circuit framework of pulse-width modulation unit 214a, 214b, 214c is identical, illustrates with pulse-width modulation unit 214a at this.Pulse-width modulation unit 214a is input amplifier more than, has comprised a current mirror, a plurality of differential to differential pair and a gain circuitry 2149.Current mirror couples a driving power VDD, comprises P type MOS (metal-oxide-semiconductor) transistor 2141,2142, and its grid is connected to each other.First is differential to comprise a current source I1 and N-type MOS (metal-oxide-semiconductor) transistor 2143,2144 to differential pair.N-type MOS (metal-oxide-semiconductor) transistor 2143,2144 connects the P type MOS (metal-oxide-semiconductor) transistor 2141,2142 in the current mirror respectively.The grid of N-type MOS (metal-oxide-semiconductor) transistor 2143 receives a reference voltage Vton, and the grid of N-type MOS (metal-oxide-semiconductor) transistor 2144 receives Continuity signal Cs, with comparison reference voltage Vton and Continuity signal Cs.Second differential comprises a current source I2 and N-type MOS (metal-oxide-semiconductor) transistor 2145,2146 to differential pair.N-type MOS (metal-oxide-semiconductor) transistor 2145,2146 connects the P type MOS (metal-oxide-semiconductor) transistor 2141,2142 in the current mirror respectively.The grid received current detection signal Ise2 of N-type MOS (metal-oxide-semiconductor) transistor 2145, the grid received current detection signal Ise1 of N-type MOS (metal-oxide-semiconductor) transistor 2146 is to judge the current difference between two passages.The 3rd differential comprises a current source I3 and N-type MOS (metal-oxide-semiconductor) transistor 2147,2148 to differential pair.N-type MOS (metal-oxide-semiconductor) transistor 2147,2148 connects the P type MOS (metal-oxide-semiconductor) transistor 2141,2142 in the current mirror respectively.The grid received current detection signal Ise3 of N-type MOS (metal-oxide-semiconductor) transistor 2147, the grid received current detection signal Ise1 of N-type MOS (metal-oxide-semiconductor) transistor 2148 is to judge the current difference between two passages.2149 current potentials according to the drain electrode end of the P type MOS (metal-oxide-semiconductor) transistor 2141,2142 in the current mirror of gain circuitry produce pulse-width modulation signal Tock1.Do not have second differential differential during to differential pair to differential pair and the 3rd, when Continuity signal Cs is higher than reference voltage Vton, the accurate position of the drain electrode of P type MOS (metal-oxide-semiconductor) transistor 2142 can be lower than the accurate position of drain electrode of P type MOS (metal-oxide-semiconductor) transistor 2141, turn-offs corresponding passage to stop gain circuitry 2149 to produce pulse-width modulation signal Tock1.And add second differential differential during to differential pair to differential pair and the 3rd, when current detection signal Ise2 (Ise3) is higher than current detection signal Ise1, the electric current of the N-type of flowing through MOS (metal-oxide-semiconductor) transistor 2145 (2147) greater than the electric current of the N-type MOS (metal-oxide-semiconductor) transistor 2146 (2148) of flowing through so that the compensation rate of respective channel current difference to be provided.Therefore, the N-type of flowing through MOS (metal-oxide-semiconductor) transistor 2144 electric currents are differential during to the differential compensation rate to differential pair of differential pair and the 3rd with second of full remuneration greater than N-type MOS (metal-oxide-semiconductor) transistor 2143 electric currents of flowing through, and gain circuitry 2149 just stops to produce pulse-width modulation signal Tock1.It is differential to the differential accurate position during to differential pair of differential pair and the 3rd that the accurate position of Continuity signal Cs this moment can be higher than second of above-mentioned nothing, so the ON time of respective channel can prolong channel current is increased.On the contrary, when current detection signal Ise2 (Ise3) is lower than current detection signal Ise1, the electric current of the N-type of flowing through MOS (metal-oxide-semiconductor) transistor 2145 (2147) less than the electric current of the N-type MOS (metal-oxide-semiconductor) transistor 2146 (2148) of flowing through so that the compensation rate of respective channel current difference to be provided.Therefore, the N-type of flowing through MOS (metal-oxide-semiconductor) transistor 2143 electric currents are differential during to the differential compensation rate to differential pair of differential pair and the 3rd with second of full remuneration greater than N-type MOS (metal-oxide-semiconductor) transistor 2144 electric currents of flowing through, and gain circuitry 2149 just stops to produce pulse-width modulation signal Tock1.So, the ON time of respective channel can reduce to reduce channel current.
See also Fig. 5, for according to the multiphase DC of one second preferred embodiment of the present invention circuit diagram to the direct current switching controller.Multiphase DC has comprised a constant onunit 310, a pulse-width modulation module 320 and a pulse width logic unit 330 to the direct current switching controller.Constant onunit 310 comprises a comparator 302, a SR latch 304, a trailing edge testing circuit 306, a current source ION, a switch SW and a time capacitor C ON.One non-inverting input of comparator 302 receives a reference voltage Vref, and a reverse input end receives voltage feedback signal FB.When the accurate position of voltage feedback signal FB is lower than the accurate position of reference voltage Vref, the setting end S of comparator 302 output signal Pon to SR latchs 304.Trailing edge testing circuit 306 couples one of SR latch 304 and resets end R, when detecting the trailing edge of conducting decision signal Tcs, SR latch 304 is reseted.Therefore, SR latch 304 determines signal Tcs and output signal Pon to produce a Signal-controlled switch SW in inverse output terminal Q ' according to conducting.Stopcock SW makes current source ION begin time capacitor C ON is charged to produce Continuity signal Cs when SR latch 304 receives output signal Pon.When SR latch 304 received conducting decision signal Tcs, actuating switch SW made zero time capacitor C ON.The external time of current source ION is set resistance R ton, to set the size of current to time capacitor C ON charging according to time capacitor C ON.Time set resistance R ton in the present embodiment couples input voltage vin, and so multiphase DC can be adjusted to preferable set point according to applied input voltage vin to the constant ON time of direct current switching controller.
Pulse-width modulation module 320 comprises a comparator 312 and delay circuit 314a, 314b, 314c.The non-inverting input of comparator 312 receives reference voltage Vton, and reverse input end receives Continuity signal Cs.When Continuity signal Cs was higher than reference voltage Vton, conducting determined signal Tcs can reduce to low level, makes trailing edge testing circuit 306 reset SR latch 304. Delay circuit 314a, 314b, 314c also detect conducting simultaneously and determine signal Tcs, and stop to produce pulse-width modulation signal Tock1, Tock2, Tock3 a time of delay after detecting conducting to determine signal Tcs.Delay circuit 314a, 314b, 314c be received current detection signal Ise1, Ise2, Ise3 simultaneously, and according to the current detection signal of respective channel and the discrepancy adjustment time of delay between other current detection signal.Pulse width logic unit 330 couples pulse-width modulation module 320, produces pulse-width modulation control signal S1a, S1b, S2a, S2b, S3a, S3b according to pulse-width modulation signal Tock1, Tock2, Tock3 and output signal Pon.
Then, see also Fig. 6, be the circuit diagram of the pulse-width modulation unit among Fig. 5.Because the circuit framework of delay circuit 314a, 314b, 314c is identical, illustrates with delay circuit 314a at this.Delay circuit 314a has comprised a trailing edge testing circuit 3141, a current source 3142, an electric capacity 3143, has postponed adjustment unit 3144,3145, a comparator 3146, a SR latch 3147 and a switch 3148.When trailing edge testing circuit 3141 detects the trailing edge of conducting decision signal Tcs, produce a pulse signal and with of short duration actuating switch 3148 current potential of electric capacity 3143 is made zero.Current source 3142 is a constant current source, to electric capacity 3143 chargings.The setting end S of SR latch 3147 receives output signal Pon and begins to produce pulse-width modulation signal Tock1.The non-inverting input coupling capacitance 3143 of comparator 3146, reverse input end receive a reference voltage Vdt, and output couples reseting of SR latch 3147 and holds R.Be higher than reference voltage Vdt when the accurate position of electric capacity 3143 rises to, comparator 3146 output high levle signals are to reset SR latch 3147, to stop to produce pulse-width modulation signal Tock1.Current source 3142, electric capacity 3,143 one comparators 3146 and SR latch 3147 constitute a benchmark delay cell.Do not postponing under adjustment unit 3144,3145 the situation, it is certain value that the current potential of electric capacity 3143 is charged to the time that equals reference voltage Vdt, so benchmark delay cell determines a reference delay time.Can be for changeing impedance amplifier and postpone adjustment unit 3144,3145, its non-inverting input receives the current detection signal Ise1 of corresponding passage, and reverse input end receives current detection signal Ise2, the Ise3 of other passages respectively.When current detection signal Ise1 is higher than current detection signal Ise2 (Ise3), postponing adjustment unit 3144 (3145) can extra geometric ratio charge to electric capacity 3143 in the different electric current of accurate potential difference, is charged to the time (being reference delay time) that equals reference voltage Vdt with the current potential that shortens electric capacity 3143.When current detection signal Ise1 is lower than current detection signal Ise2 (Ise3), geometric ratio is in the different electric current of accurate potential difference in delay adjustment unit 3144 (3145) the meeting absorption current sources 3142, to reduce the size of current to electric capacity 3143 chargings, be charged to the time (being reference delay time) that equals reference voltage Vdt with the current potential that prolongs electric capacity 3143.Therefore, Fig. 5 and embodiment shown in Figure 6, the time of delay of the pulse bandwidth of pulse-width modulation signal Tock1, Tock2, the Tock3 time that to be constant onunit 310 set according to time set resistance R ton and delay circuit 314a, 314b, 314c and, and by adjusting the effect that reaches the pulse bandwidth of adjusting pulse-width modulation signal Tock1, Tock2, Tock3 time of delay.
As mentioned above, the present invention meets patent three important documents fully: novelty, creativeness and practicality.The present invention discloses with preferred embodiment hereinbefore, so is familiar with this operator and it should be understood that this embodiment only is used for describing the present invention, does not limit the scope of the invention and should not be read as.It should be noted, such as with variation and the displacement of this embodiment equivalence, all should be made as and be covered by in the category of the present invention.Therefore, protection scope of the present invention when with claims the person of being defined be as the criterion.
Claims (10)
1. a multiphase DC is to the direct current switching controller, in order to control a multiphase DC to a plurality of passages in the DC converting circuit so that an output voltage to be provided, this multiphase DC comprises the direct current switching controller:
One constant onunit is according to the generation time point of this output voltage with the Continuity signal that determines to represent a scheduled time;
A most pulse-width modulation unit, each pulse-width modulation unit produces a pulse-width modulation signal, and wherein a pulse duration of this pulse-width modulation signal is electric current and the decision of this Continuity signal according to these a plurality of passages; And
One pulse width logic unit, respective channel in these a plurality of passages of those pulse-width modulation signal controlling that produce according to this majority pulse-width modulation unit.
2. multiphase DC according to claim 1 is to the direct current switching controller, wherein this pulse-width modulation signal is adjusted to shorten the ON time of respective channel in these a plurality of passages according to the current difference of electric current and other passages of respective channel in each this pulse-width modulation unit.
3. multiphase DC according to claim 2 is to the direct current switching controller, wherein each this pulse-width modulation unit is input amplifier more than, these many input amplifiers receive this Continuity signal and represent most current detection signals of these a plurality of channel currents in a plurality of inputs, to produce this pulse-width modulation signal.
4. multiphase DC according to claim 3 is to the direct current switching controller, wherein each these many input amplifier comprises most differential pairs, one of them produces a differential wave to each this differential pair according to the current detection signal of the current detection signal of respective channel and other passages, and this pulse-width modulation unit produces this pulse-width modulation signal according to those differential waves.
5. multiphase DC according to claim 2 is to the direct current switching controller, wherein should comprise most delay circuits in a majority pulse-width modulation unit, each this delay circuit is based on this scheduled time and a time of delay, determining this pulse duration of this pulse-width modulation signal, and be to determine according to the electric current of respective channel and the current difference of other passages this time of delay.
6. multiphase DC according to claim 5 is to the direct current switching controller, and wherein each this delay circuit comprises:
One benchmark delay cell determines a reference delay time;
At least one delay adjustment unit is according to the electric current of respective channel and current difference and this reference delay time of other passages, to determine this time of delay; And
One pulsewidth postpones generation unit, according to this scheduled time and this time of delay and, determine this pulse duration of this pulse-width modulation signal.
7. a multiphase DC in order to the electric current of balance one multiphase DC to a plurality of passages in the DC converting circuit, comprises step to the control method of DC converting circuit:
Set a constant ON time;
Detect the electric current of these a plurality of passages to produce a plurality of current detection signals;
Determine the electric current of respective channel and the current difference of other passages; And
Produce most pulse-width modulation signals, to control corresponding passage, wherein the pulse duration of each this pulse-width modulation signal is to determine according to this constant ON time and those current difference.
8. multiphase DC according to claim 7 is to the control method of DC converting circuit, and wherein this constant ON time is to set according to a resistance.
9. according to claim 7 or the 8 described multiphase DCs control method to DC converting circuit, wherein those current difference are to utilize the input amplifiers more than of a plurality of many outputs to decide according to the current detection signal that represents these a plurality of channel currents.
According to claim 7 or 8 described multiphase DCs to the control method of DC converting circuit, also comprise step:
Utilize a plurality of delay circuits, to determine time of delay according to those current difference;
Wherein, the pulse duration of each this pulse-width modulation signal is to determine according to this constant ON time and this corresponding time of delay.
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| CN107251389A (en) * | 2015-02-27 | 2017-10-13 | 株式会社自动网络技术研究所 | Signal generating circuit, voltage changer and signal generating method |
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| CN110932524A (en) * | 2018-08-30 | 2020-03-27 | 力智电子股份有限公司 | Controller for multi-phase power supply conversion and current balancing method |
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| CN107251389A (en) * | 2015-02-27 | 2017-10-13 | 株式会社自动网络技术研究所 | Signal generating circuit, voltage changer and signal generating method |
| CN107251389B (en) * | 2015-02-27 | 2019-05-14 | 株式会社自动网络技术研究所 | Signal generating circuit, voltage changer and signal generating method |
| CN105896980A (en) * | 2015-04-27 | 2016-08-24 | 成都芯源系统有限公司 | Constant on-time controlled DC-DC converter and multiphase power supply |
| CN109314463A (en) * | 2016-06-14 | 2019-02-05 | 住友电气工业株式会社 | The control method of multiphase DC/DC converter, computer program and multiphase DC/DC converter |
| CN106059290A (en) * | 2016-08-02 | 2016-10-26 | 成都芯源系统有限公司 | Multi-channel DC-DC converter and control circuit and method |
| CN110932524A (en) * | 2018-08-30 | 2020-03-27 | 力智电子股份有限公司 | Controller for multi-phase power supply conversion and current balancing method |
| CN110932524B (en) * | 2018-08-30 | 2022-06-17 | 力智电子股份有限公司 | Controller for multi-phase power supply conversion and current balancing method |
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Application publication date: 20130717 |