CN107979266B - Single-inductance double-output switch converters voltage-type-capacitance current ripple mixing control method and device - Google Patents

Single-inductance double-output switch converters voltage-type-capacitance current ripple mixing control method and device Download PDF

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Publication number
CN107979266B
CN107979266B CN201711217623.4A CN201711217623A CN107979266B CN 107979266 B CN107979266 B CN 107979266B CN 201711217623 A CN201711217623 A CN 201711217623A CN 107979266 B CN107979266 B CN 107979266B
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voltage
output
capacitance current
switch converters
inductance double
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CN107979266A (en
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王瑶
徐利梅
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Southwest Minzu University
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0003—Details of control, feedback or regulation circuits
    • H02M1/0016—Control circuits providing compensation of output voltage deviations using feedforward of disturbance parameters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0003—Details of control, feedback or regulation circuits
    • H02M1/0016—Control circuits providing compensation of output voltage deviations using feedforward of disturbance parameters
    • H02M1/0019—Control circuits providing compensation of output voltage deviations using feedforward of disturbance parameters the disturbance parameters being load current fluctuations
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0083—Converters characterised by their input or output configuration
    • H02M1/009—Converters characterised by their input or output configuration having two or more independently controlled outputs

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)

Abstract

The invention discloses a kind of single-inductance double-output switch converters voltage-type-capacitance current ripple mixing control method and devices.Voltage mode control device CTR1Detect the single-inductance double-output switch converters output voltage Voa, generate control pulse Vgs1, to control branch switch pipe S in single-inductance double-output switch converters1Conducting and shutdown；Capacitance current ripple control device CTR2Detect the single-inductance double-output switch converters output voltage Vob, the road a capacitance current Ic1With the road b capacitance current Ic2, generate control pulse Vgs2, to control main switch S in single-inductance double-output switch converters2Conducting and shutdown.The beneficial effects of the present invention are single-inductance double-output switch converters can quickly adjust the control pulse of main switch when load changes, and output voltage overshoot is small, and regulating time is short, the load transient better performances of converter；When output branch circuit load changes, the cross influence for exporting branch all the way can be effectively reduced.

Description

Single-inductance double-output switch converters voltage-type-capacitance current ripple mixes controlling party Method and device
Technical field
The present invention relates to switch converters technical field, especially a kind of single-inductance double-output switch converters voltage-type- Capacitance current ripple mixing control method and device.
Background technique
With widely available, body of the user to its power supply of the portable electronic products such as smart phone, tablet computer The requirement of product, cost and efficiency is higher and higher.Studies have shown that single-inductance double-output switch converters can be smart phone, plate The portable electronic products such as computer provide the independent power supply of two-way, reduce inductance and control the quantity of chip, effectively Power volume is reduced, is reduced the production cost, transfer efficiency is improved, thus more and more by academia and industry Concern.
Traditional voltage-type-peak point current mixing control, control thought is: control circuit includes voltage mode control circuit And peak current control circuitry, the output voltage that voltage mode control circuit will test are compared with reference voltage, the mistake of output The error voltage that difference signal is amplified after error amplifier compensates, the error voltage of amplification is with sawtooth voltage compared with Device compares output control signal, controls main circuit branch switch pipe.Peak current control circuitry includes voltage control loop and electric current Control ring, voltage control loop sampling another output voltage are compared with reference voltage, and the error signal of output passes through error The error voltage amplified after amplifier offset.Current regulator passes through the error voltage of the inductive current of sampling and amplification Comparator compares, and respectively as the input signal at the end rest-set flip-flop R and the end S, the end rest-set flip-flop Q is defeated for comparison result and clock signal Signal is controlled out, controls main circuit main switch.This method is used for single-inductor dual-output converter, has and intersects between exporting branch Influence serious, the slow-footed disadvantage of load transient response.
Summary of the invention
The object of the present invention is to provide a kind of control method and device of single-inductance double-output switch converters, are allowed to simultaneously It is influenced with preferable load transient performance and lesser output cross, and is suitable for the more of single-inductance double-output switch converters Kind topological structure.
Realize that the technical solution of the object of the invention is as follows:
Single-inductance double-output switch converters voltage-type-capacitance current ripple mixing control method, voltage mode control device CTR1Detect the single-inductance double-output switch converters output voltage Voa, generate control pulse Vgs1, to control single inductance Branch switch pipe S in dual output switch converters1Conducting and shutdown；Capacitance current ripple control device CTR2Detect single electricity Feel dual output switch converters output voltage Vob, the road a capacitance current Ic1With the road b capacitance current Ic2, generate control pulse Vgs2, To control main switch S in single-inductance double-output switch converters2Conducting and shutdown.
Further, the control pulse Vgs1Generation method are as follows: output voltage VoaWith voltage reference value Vref1By Error amplifier EAP1Generate the error signal V of amplificationc1It is sent into comparator CMP1Positive input terminal, saw-toothed wave generator STH produce Raw sawtooth wave VmIt is sent into comparator CMP1Negative input end, Vc1And VmPass through comparator CMP1Generate control pulse Vgs1；It is described Control pulse Vgs2Generation method are as follows: output voltage VobWith voltage reference value Vref2By error amplifier EAP2Generate amplification Error signal Vc2It is sent into comparator CMP2Negative input end, capacitance current Ic1With capacitance current Ic2It is obtained by adder ADD Total capacitance current IcIt is sent into comparator CMP2Positive input terminal；IcAnd Vc2Comparison result be sent into rest-set flip-flop TGR the end R, control Main switch S processed2Shutdown；Clock signal clk is sent into the end S of rest-set flip-flop TGR, controls main switch S2Conducting.
Single-inductance double-output switch converters voltage-type-capacitance current ripple mixed control apparatus, including voltage mode control Device CTR1With capacitance current ripple control device CTR2；The voltage mode control device CTR1Including the voltage detecting circuit being sequentially connected VS1, error amplifier EAP1, comparator CMP1With driving circuit DR1, and it is connected to CMP1Saw-toothed wave generator STH；EAP1 It is also connected with reference voltage Vref1；The capacitance current ripple control device CTR2Including the voltage detecting circuit VS being sequentially connected2, accidentally Poor amplifier EAP2, comparator CMP2, rest-set flip-flop TGR and driving circuit DR2；It further include the electricity for being connected respectively to adder ADD Capacitance current detection circuit IS1With capacitance current detection circuit IS2, ADD is also connected to CMP2；EAP2It is also connected with reference voltage Vref2, TGR is also connected with clock signal clk；The VS1、VS2、IS1、IS2、DR1And DR2It is connected respectively to the single-inductance double-output switch Converter.
Further, the single-inductance double-output switch converters are Buck converter, Boost, Buck- Boost or Bipolar converter.
Compared with prior art, the beneficial effects of the present invention are:
One, of the invention compared with existing voltage-type-peak point current mixing control single-inductance double-output switch converters Single-inductance double-output switch converters can quickly adjust the control pulse of main switch, output voltage when load changes Overshoot is small, and regulating time is short, the load transient better performances of converter.
Two, of the invention compared with existing voltage-type-peak point current mixing control single-inductance double-output switch converters Single-inductance double-output switch converters can effectively reduce the intersection for exporting branch all the way when output branch circuit load changes It influences.
Detailed description of the invention
Fig. 1 is system construction drawing of the invention.
Fig. 2 is the circuit structure diagram when present invention uses Buck converter.
Fig. 3 is the waveform diagram that the inductive current used when Buck converter and switching device of the invention control pulse.Wherein, Fig. 3 a is the present invention in d1<d2When i.e. continuous conduction mode drops in inductive current liter-liter-, inductive current and switching device control pulse Waveform；Fig. 3 b is the present invention in d1>d2I.e. inductive current liter-drop-drop continuous conduction mode when, inductive current and switching device control Signal waveform processed.
Fig. 4 is that the present invention and voltage-type-peak point current mixing control single-inductance double-output switch converters are exporting respectively Transient state time-domain-simulation waveform when branch a and b load variation.Wherein, Fig. 4 a is that voltage-type-peak point current mixing controls single inductance Transient response waveform of the dual output switch converters when exporting branch a load variation；Fig. 4 b is that the present invention is negative in output branch a Carry transient response waveform when variation；Fig. 4 c is that voltage-type-peak point current mixing control single-inductance double-output switch converters exist Export transient response waveform when branch b load variation；Fig. 4 d is transient response of the present invention when exporting branch b load variation Waveform.
Specific embodiment
The mixing control of voltage-type-capacitance current ripple, basic thought is: control circuit include voltage mode control circuit and Capacitance current ripple control circuit, voltage mode control circuit is with above-mentioned analysis, for controlling main circuit branch switch pipe.Capacitor electricity Flow liner wave control circuit equally includes voltage control loop and current regulator, voltage control loop sampling and outputting voltage and reference voltage It is compared, the error voltage that the error signal of output is amplified after error amplifier compensates.Current regulator will be adopted Compared with the capacitance current of sample and the error voltage of amplification are by comparator, comparison result and clock signal are respectively as rest-set flip-flop The input signal at the end R and the end S, the end rest-set flip-flop Q output control signal, controls main circuit main switch.Voltage-type-capacitance current There is ripple mixing control single-inductor dual-output converter output cross to influence small, the good advantage of load transient performance.
The invention will now be described in further detail with reference to the accompanying drawings.
As shown in Figure 1, single-inductance double-output switch converters voltage-type-capacitance current ripple mixing control method and its dress It sets, by converter TD and switching tube S1、S2Control device composition.Its control device is mainly by voltage mode control device CTR1And electricity Capacitance current ripple control device CTR2Composition.Voltage mode control device CTR1By voltage detecting circuit VS1, reference voltage Vref1, error puts Big device EAP1, saw-toothed wave generator STH, comparator CMP1, driving circuit DR1Composition；Capacitance current ripple control device CTR2By electricity Press detection circuit VS2, capacitance current detection circuit IS1, capacitance current detection circuit IS2, adder ADD, reference voltage Vref2、 Error amplifier EAP2, comparator CMP2, rest-set flip-flop TGR, driving circuit DR2, clock signal clk composition.Wherein, voltage is examined Slowdown monitoring circuit VS1、VS2It is respectively used to obtain output voltage Voa、Vob, capacitance current detection circuit IS1、IS2It is respectively used to obtain capacitor Electric current Ic1、Ic2, adder ADD is for obtaining total capacitance current, error amplifier EAP1、EAP2It is respectively used to obtain amplification Error voltage Vc1、Vc2, saw-toothed wave generator STH is for obtaining sawtooth wave Vm, comparator CMP2For obtaining rest-set flip-flop TGR2 The end R input signal, S end input signal of the clock signal clk as rest-set flip-flop TGR, the end Q of rest-set flip-flop TGR exports letter Number for obtaining switching tube S2Control signal, comparator CMP1For obtaining switching tube S1Control signal, via driving circuit DR1、DR2The conducting and shutdown of control switch converter TD switching tube.
The converter TD of this example is Buck converter, and working process and principle are:
Control device is using voltage-type-capacitance current ripple mixing control working process and principle: Fig. 2 shows electricity Die mould controller CTR1Sampling and outputting voltage Voa, with reference voltage Vref1Comparison result pass through error amplifier EAP1After obtain The error voltage V of amplificationc1；Vc1The sawtooth wave V generated with saw-toothed wave generator STHmPass through comparator CMP1, output control signal Vgs1Control switch pipe S1.Capacitance current ripple control device CTR2Sampling and outputting voltage VobWith capacitance current Ic1、Ic2；Output voltage VobWith reference voltage Vref2Comparison result pass through error amplifier EAP2The error voltage V amplified afterwardsc2；Capacitance current Ic1、Ic2Total capacitance current I is obtained by adder ADDc；IcWith Vc2Pass through comparator CMP2Compare to obtain rest-set flip-flop TGR The end R input signal, TGR generate main switch S2Cut-off signals be connected to driving circuit DR2Input terminal, DR2Output end It is connected to main switch S2Gate pole control terminal, control switch pipe S2Shutdown.
Fig. 3 shows the working sequence and inductive current waveform diagram that Fig. 2 circuit works in continuous current mode conduction mode. When converter working sequence is Fig. 3 a, in d1aTsIn time, S1And S2Conducting, D1And D2Shutdown, inductive current pass through output branch A is with charging ramp (Vin-Voa)/L rises.In (d2a-d1a)TsIn time, S2And D2Conducting, S1And D1Shutdown, inductive current pass through Branch b is exported with charging ramp (Vin-Vob)/L continues to rise.In (1-d2a)TsIn time, D1And D2Conducting, S1And S2Shutdown, electricity Inducing current is by output branch b with the slope-V that dischargesob/ L decline.When converter working sequence is Fig. 3 b, in d2bTsIn time, S1 And S2Conducting, D1And D2Shutdown, inductive current is by output branch a with charging ramp (Vin-Voa)/L rises.In (d1b-d2b)Ts In time, S1And D1Conducting, S2And D2Shutdown, inductive current is by output branch a with the slope-V that dischargesoa/ L decline.In (1-d1b) TsIn time, D1And D2Conducting, S1And S2Shutdown, inductive current is by output branch b with the slope-V that dischargesob/ L decline, until electricity Road enters next switch periods.
Time-domain-simulation analysis is carried out to method of the invention with PSIM simulation software, it is as a result as follows.
Fig. 4 is to be implemented on single-inductance double-output Buck converter using voltage-type-peak point current mixing control and the present invention The time-domain-simulation waveform diagram of output voltage and output electric current when exporting branch circuit load mutation, Fig. 4 a, Fig. 4 b respectively correspond voltage Type-peak point current mixing control and voltage-type-capacitance current ripple mixing control single-inductance double-output Buck converter output branch The time-domain-simulation waveform of output voltage and output electric current when road a load variation, Fig. 4 c, Fig. 4 d respectively correspond voltage-type-peak value electricity Stream mixing control and voltage-type-capacitance current ripple mixing control single-inductance double-output Buck converter output branch b load become The time-domain-simulation waveform of output voltage and output electric current when change.In Fig. 4 a, Fig. 4 b, the voltage-type-single electricity of peak point current mixing control Feel dual output Buck converter and voltage-type-capacitance current ripple mixing control single-inductance double-output Buck converter exports branch The output electric current I of aoaFrom 1A mutation to 1.5A, the output electric current I of branch b is exportedoaWhen for 1A, voltage-type-peak point current mixing Controlling single-inductance double-output output branch a is 200mV to the cross influence of output branch b；And use voltage-type-electricity of the invention Capacitance current ripple mixing control single-inductance double-output Buck switch converters output branch a to output branch b cross influence about 50mV.In Fig. 4 c, Fig. 4 d, voltage-type-peak point current mixing control single-inductance double-output Buck converter and voltage-type-capacitor electricity The output electric current I of flow liner wave mixing control single-inductance double-output Buck converter output branch bobFrom 1A mutation to 1.5A, output The output electric current I of branch aoaWhen for 1A, voltage-type-peak point current mixing control single-inductance double-output Buck converter exports branch The output voltage V of bobEnter new stable state, overshoot 200mV after about 3ms；And use voltage-type-capacitor of the invention The transient state regulating time of current ripples mixing control single-inductance double-output Buck converter is very short, overshoot 50mV.It can be seen that The output branch b output voltage transient state overshoot of the switch converters of invention is small, and regulating time is short, and load transient performance is good, and It is small to the cross influence of output branch b to export branch a.The simulated conditions of Fig. 4 are input voltage Vin=10V, reference voltage Vref1 =1.8V, Vref2=3.3V, inductance L=100 μ H, capacitor C1=470 μ F, C2=220 μ F, load resistance Ra=1.8 Ω, Rb= 3.3Ω。
In the present invention, converter TD may be Boost, One Buck-Boost converter body or Bipolar converter.

Claims (4)

1. single-inductance double-output switch converters voltage-type-capacitance current ripple mixing control method, which is characterized in that voltage-type Controller CTR1Detect the single-inductance double-output switch converters output voltage Voa, generate control pulse Vgs1, to control Branch switch pipe S in single-inductance double-output switch converters1Conducting and shutdown；Capacitance current ripple control device CTR2Detection institute State single-inductance double-output switch converters output voltage Vob, the road a capacitance current Ic1With the road b capacitance current Ic2, generate control pulse Vgs2, to control main switch S in single-inductance double-output switch converters2Conducting and shutdown.
2. the method as described in claim 1, which is characterized in that the control pulse Vgs1Generation method are as follows: output voltage VoaWith voltage reference value Vref1By error amplifier EAP1Generate the error signal V of amplificationc1It is sent into comparator CMP1It is just defeated Enter end, the sawtooth wave V that saw-toothed wave generator STH is generatedmIt is sent into comparator CMP1Negative input end, Vc1And VmPass through comparator CMP1Generate control pulse Vgs1；The control pulse Vgs2Generation method are as follows: output voltage VobWith voltage reference value Vref2Through Cross error amplifier EAP2Generate the error signal V of amplificationc2It is sent into comparator CMP2Negative input end, capacitance current Ic1And capacitor Electric current Ic2Total capacitance current I is obtained by adder ADDcIt is sent into comparator CMP2Positive input terminal；IcAnd Vc2Comparison knot Fruit is sent into the end R of rest-set flip-flop TGR, controls main switch S2Shutdown；Clock signal clk is sent into the end S of rest-set flip-flop TGR, Control main switch S2Conducting.
3. single-inductance double-output switch converters voltage-type-capacitance current ripple mixed control apparatus, it is characterised in that: including electricity Die mould controller CTR1With capacitance current ripple control device CTR2；
The voltage mode control device CTR1Including the voltage detecting circuit VS being sequentially connected1, error amplifier EAP1, comparator CMP1 With driving circuit DR1, and it is connected to CMP1Saw-toothed wave generator STH；EAP1It is also connected with reference voltage Vref1；
The capacitance current ripple control device CTR2Including the voltage detecting circuit VS being sequentially connected2, error amplifier EAP2, ratio Compared with device CMP2, rest-set flip-flop TGR and driving circuit DR2；It further include the capacitance current detection circuit for being connected respectively to adder ADD IS1With capacitance current detection circuit IS2, ADD is also connected to CMP2；EAP2It is also connected with reference voltage Vref2, TGR, which is also connected with clock, to be believed Number CLK；
The VS1、VS2、IS1、IS2、DR1And DR2It is connected respectively to the single-inductance double-output switch converters.
4. device as claimed in claim 3, which is characterized in that the single-inductance double-output switch converters are Buck transformation Device, Boost, One Buck-Boost converter body or Bipolar converter.
CN201711217623.4A 2017-11-28 2017-11-28 Single-inductance double-output switch converters voltage-type-capacitance current ripple mixing control method and device Expired - Fee Related CN107979266B (en)

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CN110661422A (en) * 2019-10-26 2020-01-07 西南民族大学 Ripple control method and device for single-inductor double-output switching converter
CN115347781B (en) * 2022-08-31 2024-01-26 陕西理工大学 Design method of intrinsically safe single-inductor multi-output switch converter

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CN103560668A (en) * 2013-11-12 2014-02-05 东南大学 Method for realizing secondary switch 100% duty ratio output in single-inductor dual-output converter
CN104660033A (en) * 2015-02-10 2015-05-27 西南交通大学 Frequency conversion control method and device for single-inductor dual-output switch converter in continuous conduction mode
CN106253662A (en) * 2016-08-25 2016-12-21 西南交通大学 Switch converters frequency V2C dynamic afterflow control method surely and control device thereof
CN106300964A (en) * 2016-08-24 2017-01-04 西南交通大学 Independent charge and discharge sequential single-inductance double-output switch converters method for controlling frequency conversion and device thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103560668A (en) * 2013-11-12 2014-02-05 东南大学 Method for realizing secondary switch 100% duty ratio output in single-inductor dual-output converter
CN104660033A (en) * 2015-02-10 2015-05-27 西南交通大学 Frequency conversion control method and device for single-inductor dual-output switch converter in continuous conduction mode
CN106300964A (en) * 2016-08-24 2017-01-04 西南交通大学 Independent charge and discharge sequential single-inductance double-output switch converters method for controlling frequency conversion and device thereof
CN106253662A (en) * 2016-08-25 2016-12-21 西南交通大学 Switch converters frequency V2C dynamic afterflow control method surely and control device thereof

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