CN107222088A - Control module, switching power supply device and peak-current mode control method - Google Patents
Control module, switching power supply device and peak-current mode control method Download PDFInfo
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- CN107222088A CN107222088A CN201610164447.1A CN201610164447A CN107222088A CN 107222088 A CN107222088 A CN 107222088A CN 201610164447 A CN201610164447 A CN 201610164447A CN 107222088 A CN107222088 A CN 107222088A
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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
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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
- H02M1/0003—Details of control, feedback or regulation circuits
Abstract
The invention discloses a kind of control module, switching power supply device and peak-current mode control method, the control module is included:One current order generation unit produces a current reference signal according to the output voltage of power transfer module；An inductive current of one current sensor to sense power transfer module, and produce a current sensing signal；One current comparator is used to produce electric current comparison signal when current sensing signal is same as current reference signal；One shut-in time controller produces shut-in time control signal according to the input voltage and output voltage of power transfer module；One time reference counter receives electric current comparison signal and shut-in time control signal, and in producing a trigger signal after the shut-in time that shut-in time control signal is reacted；One peak value comparison method unit is according to trigger signal control power switch conducting.
Description
Technical field
The present invention is filled on power supply provisioning technique, and in particular to applied to switching power supply
Put, and switching power supply device peak-current mode control method.
Background technology
Electronic installation is operated using electric power.Switched-mode power supply is generally because having high efficiency, small size and low heavy
Amount, therefore to supply electricity to the electronic equipment of many today.Controlled in Current Mode and Based is to be used for switched-mode power supply conversion
The conventional control method of device, compared with voltage mode is controlled, improves control loop dynamic response, and can obtain
More preferable line noise suppressed.
With regard to the difference of current feedback mechanism, conventional Controlled in Current Mode and Based has Average Current Control
(averagecurrent mode control) controls (peak current mode with peak-current mode
Control) two major class., it is necessary to additionally add slope-compensation (slope under peak-current mode
Compensator) to promote stiffness of system.
In the application (such as DC-DC converter) of input voltage relatively small change, because of its input voltage
And output voltage is fixes, therefore certain slope can be designed to meet the demand condition of DC-DC converter.
However, the application scenarios of the input such as power factor corrector exchange input in change, compensation slope needs
Change to dynamic, cause circuit design to be difficult.
The content of the invention
It is an object of the invention to provide a kind of peak point current module controlling party of switching power supply device
Method, switching power supply device and its control module.
A kind of peak-current mode control method of switching power supply device is provided according to the present invention, it is wrapped
Containing following steps:A) closing is produced according to the input voltage and output voltage of switching power supply device
Time control signal；B) relatively voltage comparison signal is produced according to reference voltage level and output voltage；
C) current reference signal is produced according to voltage comparison signal；D) in the inductance of switching power supply device
Electric current is same as producing electric current comparison signal during current reference signal；E) according to shut-in time control signal and
Electric current comparison signal is in producing trigger signal after the shut-in time；And it is f) wide with trigger pulse by trigger signal
Modulated signal is spent to control the operation of switching power supply device.
A kind of control module is separately provided according to the present invention to include:One current order generation unit, is electrically connected to electricity
Source modular converter, current order generation unit produces current reference signal according to output voltage；One current sense
Device, to sense the inductive current of power transfer module, and produces current sensing signal；One current comparator,
To produce electric current comparison signal when current sensing signal is same as current reference signal；Shut-in time controls
Device, shut-in time control signal is produced according to input voltage and output voltage；One time reference counter, connects
Electric current comparison signal and shut-in time control signal are received, and when the closing that shut-in time control signal is reacted
Between after produce trigger signal；And a peak value comparison method unit, control power switch according to trigger signal
Conducting.
The present invention more provides a kind of switching power supply device, comprising:One power transfer module, electrical connection
In input voltage and output voltage, and include the inductor and power switch being electrically connected to each other；One control module,
Comprising:One current order generation unit, is electrically connected to power transfer module, and produce electricity according to output voltage
Flow reference signal；One current sensor, foundation produces current sensing signal by the inductive current of inductor；
One current comparator, is electrically connected to current order generation unit, peak value comparison method unit and current sensor,
Current comparator produces electric current comparison signal when current sensing signal is same as current reference signal；One closes
Time controller, shut-in time control signal is produced according to input voltage and output voltage；One time reference meter
Number device, is electrically connected to current comparator and shut-in time controller, and time reference counter receives electric current and compared
Signal and shut-in time control signal, and touched in being produced after the shut-in time that shut-in time control signal is reacted
Signal to trigger peak value comparison method unit to control the operation of power switch；And a peak value comparison method
Unit, is closed and conducting power switch according to electric current comparison signal with trigger signal.
Brief description of the drawings
Fig. 1 illustrates a circuit box of the switching power supply device according to first embodiment of the invention
Figure；
Fig. 2 illustrates a circuit box of the switching power supply device according to second embodiment of the invention
Figure；
Fig. 3 is illustrated shows inductive current and closing of the power supply device in peak current controller according to exchange
The graph of a relation of time；
Fig. 4 illustrates the time sequences figure of the switching power supply device according to second embodiment of the invention；
Fig. 5 illustrates a circuit box of the switching power supply device according to third embodiment of the invention
Figure；
Fig. 6 illustrates a circuit box of the switching power supply device according to four embodiment of the invention
Figure；And
Fig. 7 illustrates the circuit block diagram of the switching power supply device according to fifth embodiment of the invention.
Wherein, reference：
10th, 10A, 10B switching power supply device
100 direct currents are to dc source modular converter
100A is exchanged to dc source modular converter
100B direct currents are to AC power modular converter
120 control modules
122 peak value comparison method units
124 current comparators
126 digital control units
128 voltage comparators
129 reference voltage sources
130 output voltage converters
132 time reference counters
134 shut-in time controllers
136 input voltage converters
138 current converters
140 current sensors
142 current order generation units
COMP electric current comparison signals
iLSimulaed inductance electric current
iREFAnalog current reference signal
iSENSEAnalog current sensing signal
L inductors
Pwm pulse bandwidth modulation signals
TOFFShut-in time control signal
VINAnalog input voltage
VOUTAnalog output voltage
VREFReference voltage level
ZERO trigger signals
Embodiment
Fig. 1 is refer to, it illustrates the electricity of the switching power supply device according to first embodiment of the invention
Road block diagram.In Fig. 1, switching power supply device 10 includes power transfer module 100 and control module
120.Control module 120 is that the running of power transfer module 100 is controlled with peak-current mode.Suitching type
Power supply device 10 can be for example changes electricity to DC conversion power feeding mechanism, exchange for direct current to direct current
Source supply device or direct current are to AC power source converting apparatus.
Further, when control module 120 makes switching power supply device 10 operate in continuous conduction mode
In (continuous-conduction Mode, CCM).In continuous conduction mode, pass through switched-mode power supply
Electric current on the inductor L of feeding mechanism 10 belongs to the pattern being continuously turned on, i.e. inductive current iLMinimum value
Be not zero (i.e. inductor L not exclusively discharges), thus keeps continuous conduction mode.
Power transfer module 100 receives analog input voltage VIN, and according to the pulse width of control module 120
Modulated signal PWM is by analog input voltage VINIt is converted into analog output voltage VOUT, and simulation output is provided
Voltage VOUTTo load.
Referring to Fig. 2, it illustrates the electricity of the switched-mode power supply conversion equipment according to second embodiment of the invention
Road block diagram.In fig. 2, power transfer module 100 be direct current to dc source modular converter, it receives into
The input voltage V of DC formIN, and the output voltage V of DC form is provided intoOUTTo load.Control mould
Block 120 is electrically connected to power transfer module 100, and according to the input voltage V of power transfer module 100IN, it is defeated
Go out voltage VOUTAnd inductive current iLTo control the running of power transfer module 100.
Control module 120 includes peak value comparison method unit 122, current comparator 124, digital control unit
126th, voltage comparator 128, reference voltage source 129, output voltage converter 130, time reference counter
132nd, shut-in time controller 134, input voltage converter 136, current converter 138 and current sensor
140。
Peak value comparison method unit 122 is for transmission signal to power transfer module 100, and current comparator 124 connects
Receive the signal of current sensor 140 and current converter 138 and output signal to peak value comparison method unit 122
With time reference counter 132, output voltage converter 130 receives the output voltage of power transfer module 100
VOUTAnd current order generation unit 142 is outputed signal to, current order generation unit 142 generates a signal to electricity
Stream transformer 138.Time reference counter 132 receives shut-in time controller 134 and current comparator 124
The signal of generation simultaneously outputs signal to peak value comparison method unit 122, and shut-in time controller 134 receives output
The signal that electric pressure converter 130 and input voltage converter 136 are exported.Input voltage converter 136 receives electricity
The analog input voltage V of source modular converter 100IN。
Output voltage converter 130 is analog-digital converter.Output voltage converter 130 receives direct current to straight
Flow the analog output voltage V of power transfer module 100OUT, and by analog output voltage VOUTIt is converted into phase
The digital output voltage answered.
Voltage comparator 128 receives the digital output voltage that output voltage converter 130 is exported, and numeral is defeated
Go out the reference voltage level V that voltage is provided with reference voltage source 129REFThe voltage ratio of generation after being compared compared with
Signal is transferred to digital control unit 126.The receiving voltage comparison signal of digital control unit 126, and according to electricity
Comparison signal is pressed to produce digital current reference signal, wherein digital control unit 126 is to provide output voltage
Stable feedback compensation, can be any digital control method, such as digital IIR filters.
Current converter 138 is digital analog converter, and it receives the numeral electricity that digital control unit 126 is exported
Flow reference signal, and digital current reference signal is converted into analog current reference signal iREF.Electric current sense
Survey device 140 and can be for example current transformer or shunt resistance；The simulation that the sensing of current sensor 140 passes through inductor L
Inductive current iL, and produce analog current sensing signal iSENSE。
Current comparator 124 receives the analog sensing current signal i that current sensor 140 is exportedSENSEAnd electric current
The analog current reference signal i that converter 138 is exportedREF, and according to analog sensing current signal iSENSEAnd mould
Intend current reference signal iREFComparison produce electric current comparison signal COMP；Described electric current comparison signal
COMP can be transferred to peak value comparison method unit 122 and time reference by the output end of current comparator 124
Counter 132.
Input voltage converter 136 is analog-digital converter.Input voltage converter 136 receives Power convert
The analog input voltage V of module 100IN, and by analog input voltage VINIt is converted into corresponding numeral input
Voltage.
Shut-in time controller 134 receives numeral input voltage and digital output voltage, and according to numeral input
Voltage and digital output voltage are carried out after the calculating of the shut-in time of the power switch of power transfer module 100,
Export shut-in time control signal TOFFGive time reference counter 132.
Time reference counter 132 receives the shut-in time control signal of the output of shut-in time counter 134
TOFF, and postpone T in the electric current comparison signal COMP for receiving the output of current comparator 124OFFPresented
Shut-in time, output trigger signal ZERO gives peak value comparison method unit 122.
Peak value comparison method unit 122 may be, for example, a set-reset flip-floop.Peak value comparison method unit 122 is connecing
Pulse width modulating signal PWM is sent out when receiving trigger signal ZERO and gives power transfer module 100, so that
Power switch in power transfer module 100 is according to pulse width modulating signal PWM operations, and in receiving
Pulse width modulating signal PWM, meaning are closed during the electric current comparison signal COMP that current comparator 124 is exported
Power switch i.e. in power transfer module 100 can be carried out at and lead according to pulse width modulating signal PWM
Logical (turn-on) or close (turn-off).
In general, when the length in each cycle of the power switch in power transfer module 100 is TS, work(
Each shut-in time (off time) of rate switch is TOFF, each ON time (on time) of power switch is
TON, it meets following condition:
TS=TOFF+TON。
Further, in Peak Current-Mode Controlled Circuit, power switch is periodically turned on and in simulaed inductance
Electric current iLAnalog current sensing signal iSENSEIt is same as analog current reference signal iREFWhen close, therefore power is opened
The ON time of pass is not expectable, depending on reference signal iREF.Therefore, when power switch ON time mistake
Predetermined CCM region (as shown by dotted lines in figure 3) possibly can not be operated in when big, and the present invention utilizes and controls power
The shut-in time of switch, which reaches, operates in CCM regions, and without the use of slope-compensation.
According to voltage-second balance principle, if operating under CCM condition, following condition is met:
Wherein, TSFor length of the direct current to each cycle of the power switch in dc source modular converter 100；
TOFFFor each shut-in time of power switch；
VINFor the input voltage of power transfer module 100；And
VOUTFor the output voltage of power transfer module 100.
From aforementioned condition, there is input voltage V in power transfer module 100INAnd output voltage VOUT
When fixed, by control shut-in time TOFFJust power transfer module 100 can be made to operate under CCM condition (such as
Fig. 3 is shown in solid).More specifically, under conventional peak current control mode, when analog current is with reference to letter
Number iREFDuring increase, if desired for the situation of more multi output power, power switch ON time can and then increase.
Therefore, in the cycle time (T of power switchS) on the premise of fixation, the shut-in time (T of power switchOFF)
It will shorten.Consequently, it is possible to which disengaging CCM will be produced by opening power switch once again when reaching cycle time
Operation.
Shut-in time T of the control module 120 of the present invention through control power switchOFF, to allow power switch
The predetermined shut-in time is maintained, just can make power transfer module 100 in (such as Fig. 3 solid lines of normal operating under CCM
It is shown), while into continuing to (i.e. time point the same cycle time after CCM
2Ts '-Ts '=3Ts ' -2Ts '=Ts).Wherein, it be should be appreciated that according to above-mentioned voltage-second balance principle when Power convert mould
Block 100 has input voltage VINAnd output voltage VOUTWhen fixed, if control the shut-in time for a fixed value
Have fixed cycle time (TS)。
Please refer to Fig. 2 and Fig. 4 is shone, wherein Fig. 4 illustrates the suitching type according to first embodiment of the invention
The time sequences figure of power supply device, and it shows the count signal of time reference counter 132
Time-base count, analog current reference signal iREF, analog current sensing signal iSENSE, pulse width
Modulated signal PWM, electric current comparison signal COMP and trigger signal ZERO.
When practical operation, it is defeated that control module 120 can obtain simulation of the direct current to dc source modular converter 100
Enter voltage VIN, analog output voltage VOUTAnd simulaed inductance electric current iL, and further by analog input voltage
VIN, analog output voltage VOUTAnd simulaed inductance electric current iLIt is respectively converted into numeral input voltage, numeral output
Voltage and analog current sensing signal iSENSE.Wherein, control module 120 is to utilize input voltage converter 136
Receive analog input voltage VIN, and by analog input voltage VINBe converted to numeral input voltage；Control module
120 be to receive analog output voltage V using output voltage converter 130OUT, and by analog output voltage VOUT
Be converted to digital output voltage；Utilize the sensing analog inductive current i of current converter 140L, and will simulation electricity
Inducing current iLIt is converted into analog current sensing signal iSENSE。
Digital output voltage is then passed to shut-in time controller 134 and voltage comparator 128.During closing
Between controller 134 shut-in time control signal is produced according to numeral input voltage and digital output voltage
TOFF.On the other hand, the reference voltage level V that voltage comparator 128 is produced according to reference voltage source 129REFAnd
Digital output voltage relatively produces voltage comparison signal, and this voltage comparison signal can then be passed to number
Word control unit 126.
The receiving voltage comparison signal of digital control unit 126, and produce digital current according to voltage comparison signal
Reference signal, and digital current reference signal is converted into analog current reference by current converter 138
Signal iREFAfter export to current comparator 124.Current comparator 124 is according to analog current sensing signal iSENSE
And analog current reference signal iREFRelatively produce electric current comparison signal COMP, this electric current comparison signal
COMP is transferred to peak value comparison method unit 122 and time reference counter 132.To be illustrated herein
It is that current comparator 124 can be only in analog current sensing signal iSENSEIt is same as analog current reference signal
iREFWhen send out electric current comparison signal COMP, or, current comparator 124 can in analog current sense believe
Number iSENSEDifferent from analog current reference signal iREFWhen, output is in the electric current comparison signal COMP of low level,
And in analog current sensing signal iSENSEIt is same as analog current reference signal iREFWhen, output is in high levle
Electric current comparison signal COMP.
When time reference counter 132 receives (in high levle) electric current comparison signal COMP, time base
Quasi- counter 132 can be in correspondence shut-in time control signal TOFFTriggering letter is sent out after the shut-in time presented
Number ZERO is so that the power switch conducting (turn-on) of power transfer module 100, rather than such as conventional peak electric current
The conducting power switch of pattern cycle, so as current reference signal iREFWhen increasing suddenly (Fig. 4), switch
Cycle can be temporarily increased and (be temporarily increased Ts ' by Ts as shown in Figure 3), and recover original cycle time afterwards,
CCM and response quickly so can be correctly operated in without slope-compensation.
To be illustrated herein, aforementioned digital control unit 126, voltage comparator 128 and reference voltage
The function that source 129 is provided can be provided by current order generation unit 142.That is, current order
Generation unit 142 is except the digital output voltage and reference electricity that can be exported according to output voltage converter 130
Pressure value VREFTo produce voltage comparison signal, and voltage comparison signal is converted into digital current with reference to letter
Number.Further, control module 120 can be integrated circuit, and this integrated circuit can be according to direct current to direct current
The input voltage V of modular converter 100IN, output voltage VOUTAnd inductive current iLTo control the pass of power switch
Close the time, and allow switching power supply device to operate under CCM.
In summary, the peak-current mode control method of switching power supply device of the invention is comprising such as
Lower step.First, the input voltage V that control module 120 can be according to power transfer module 100INAnd output electricity
Press VOUTTo produce shut-in time control signal, and according to reference voltage level VREFAnd output voltage VOUTRatio
Relatively produce voltage comparison signal.Then, control module 120 can produce electric current according to voltage comparison signal
Reference signal, and in the simulaed inductance electric current i of dc source modular converter 100LIt is same as current reference signal
iREFWhen produce electric current comparison signal.Finally, control module 120 receives electric current comparison signal and shut-in time control
Signal processed, and in producing trigger signal after the shut-in time, and modulated and believe with trigger pulse width by trigger signal
Number to control operation of the direct current to dc source modular converter 100.
Referring to Fig. 5, it is illustrated according to the switch power supply apparatus shown in third embodiment of the invention
Circuit block diagram.Exchange type power depicted in switch power supply apparatus and Fig. 2 depicted in Fig. 5 is supplied
Answer device similar, and identical element marking, with identical component symbol, its difference is in the power supply in Fig. 5
The input voltage V that modular converter 100 is connected toINFor by rectifier 20 but straight without the pulsation of filtering
Voltage is flowed, the use of power factor corrector is specifically for use in.Rectifier 20 can be for example bridge rectifier.
Because power factor corrector purpose makes input current be approached with AC-input voltage shape, therefore, control
Module 120 further includes multiplier 140, and it receives the digital current produced through current order generation unit 142 and joined
Signal, and the numeral input voltage that output voltage converter 136 is produced are examined, and according to digital current reference
The product output of signal and digital output voltage is with current converter 138 using the electricity as power factor corrector
Flow reference signal.The function and related description of the other elements of power transfer module 100 depicted in Fig. 5, it is real
It is identical with the power transfer module 100 of the second embodiment depicted in Fig. 2 on border, it will not be described here.Figure
Switch power supply apparatus depicted in 5 at least can reach to be filled with the switch power supply depicted in Fig. 2
Put identical function.According to above-mentioned voltage-second balance principle, it should thus be appreciated that used when as power factor corrector
When, if control shut-in time TOFFChange proportional to instantaneous input voltage, then have fixed cycle time
(TS).Further, still can apply to depicted in Fig. 2 controls exchange as depicted in Fig. 6 to direct current
Source modular converter 100A, and direct current depicted in Fig. 7 to AC power modular converter 100B (such as Fig. 7 institutes
Show) so that exchange is carried out to dc source modular converter 100A and direct current to AC power modular converter 100B
The control of peak-current mode.
Although the present invention is disclosed as above with embodiment, it is not limited to the present invention, any ability
The technical staff in domain, without departing from the spirit and scope of the present invention, when various changes and modification can be made,
Therefore protection scope of the present invention is worked as and is defined depending on the appended claims protection domain person of defining.
Claims (13)
1. the peak-current mode control method of a kind of power transfer module, it is characterised in that include:
A) shut-in time control is produced according to the input voltage and an output voltage of the power transfer module
Signal processed；
B) relatively a voltage comparison signal is produced according to a reference voltage level and the output voltage；
C) current reference signal is produced according to the voltage comparison signal；
D) produced when an inductive current of the switching power supply device is same as the current reference signal
One electric current comparison signal；
E) it is tactile in producing one after a shut-in time according to the shut-in time control signal and the electric current comparison signal
Signal；And
F) by the trigger signal to trigger a pulse width modulating signal to control the behaviour of the power transfer module
Make.
2. the method as described in claim 1, it is characterised in that step a is included:
A1) sense an analog input voltage of the power transfer module and be converted to a numeral input voltage, with
And sense an analog output voltage of the power transfer module and be converted to a digital output voltage；And
A2 the shut-in time control signal) is produced according to the numeral input voltage and the digital output voltage.
3. the method as described in claim 1, it is characterised in that step b is included:
B1) sense the analog output voltage of the power transfer module and be converted to the digital output voltage；With
And
B2 the voltage comparison signal) is produced according to the reference voltage level and the digital output voltage.
4. the method as described in claim 1, it is characterised in that the shut-in time is a fixed value.
5. a kind of control module, applied to a power transfer module is controlled, the power transfer module receives one
Input voltage simultaneously produces an output voltage, and the control module is included:
One current order generation unit, is electrically connected to the power transfer module, the current order generation unit according to
A current reference signal is produced according to the output voltage；
One current sensor, the inductive current to sense the power transfer module, and produce an electric current sense
Survey signal；
One current comparator, to produce an electricity when current sensing signal is same as the current reference signal
Flow comparison signal；
One shut-in time controller, shut-in time control letter is produced according to the input voltage and the output voltage
Number；
One time reference counter, receives the electric current comparison signal and the shut-in time control signal, and in this
A trigger signal is produced after the shut-in time that shut-in time control signal is reacted；And
One peak value comparison method unit, controls the power switch to turn on according to the trigger signal.
6. control module as claimed in claim 5, it is characterised in that the current order generation unit bag
Contain:
One reference voltage source, for producing a reference voltage level；
One voltage comparator, receives the output voltage and the reference voltage level, and according to the output voltage and be somebody's turn to do
The comparison of reference voltage level is to produce a voltage comparison signal；And
One digital control unit, the current reference signal is produced according to the voltage comparison signal.
7. control module as claimed in claim 6, it is characterised in that also include:
One input voltage converter, is electrically connected to the shut-in time controller；
One output voltage converter, is electrically connected to the voltage comparator；And
One current converter, is electrically connected between the digital control unit and the current comparator.
8. control module as claimed in claim 5, it is characterised in that also comprising a multiplier, be located at
Between the current order generation unit and the current comparator, the multiplier makes the current reference signal and this is defeated
The product for entering voltage is transferred to the current comparator.
9. a kind of switching power supply device, it is characterised in that include:
One power transfer module, is electrically connected to an input voltage and an output voltage, and comprising being electrically connected to each other
An inductor and a power switch；And
One control module, comprising:
One current order generation unit, is electrically connected to the power transfer module, and produce according to the output voltage
One current reference signal；
One current sensor, foundation produces a current sensing signal by an inductive current of the inductor；
One current comparator, is electrically connected to the current order generation unit, the peak value comparison method unit and is somebody's turn to do
Current sensor, the current comparator produces one when the current sensing signal is same as the current reference signal
Electric current comparison signal；
One shut-in time controller, shut-in time control letter is produced according to the input voltage and the output voltage
Number；
One time reference counter, is electrically connected to the current comparator and the shut-in time controller, the time
Reference counter receives the electric current comparison signal and the shut-in time control signal, and in shut-in time control
A trigger signal is produced after the shut-in time that signal is reacted to trigger the peak value comparison method unit to control
Make the operation of the power switch；And
One peak value comparison method unit, is closed with turning on the work(according to the electric current comparison signal and the trigger signal
Rate is switched.
10. switching power supply device as claimed in claim 9, it is characterised in that the Power convert
Module is to exchange to dc source modular converter, direct current to dc source modular converter or direct current to AC power
Modular converter.
11. switching power supply device as claimed in claim 9, it is characterised in that the current order
Generation unit is included:
One reference voltage source, for producing a reference voltage level；
One voltage comparator, is electrically connected to the power transfer module, and the voltage comparator receives the input voltage
And the reference voltage level, and according to the comparison of the input voltage and the reference voltage level with produce a voltage ratio compared with
Signal；
One digital control unit, is electrically connected to the voltage comparator, the voltage comparison signal to be converted into
For a current reference signal；And
One shut-in time controller, is electrically connected to the input voltage and the output voltage, and according to input electricity
Pressure and the output voltage are to produce a shut-in time control signal.
12. switching power supply device as claimed in claim 11, it is characterised in that also include:
One input voltage converter, is electrically connected to the shut-in time controller；
One output voltage converter, is electrically connected to the voltage comparator；And
One current converter, is electrically connected between the digital control unit and the current comparator.
13. switching power supply device as claimed in claim 9, it is characterised in that also multiply comprising one
Musical instruments used in a Buddhist or Taoist mass, between the current order generation unit and the current comparator, the multiplier makes the current reference
The product of signal and the input voltage is transferred to the current comparator.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108631586A (en) * | 2018-05-29 | 2018-10-09 | 合肥为民电源有限公司 | A kind of control method and device of generated output power |
| CN111176359A (en) * | 2020-01-06 | 2020-05-19 | 深圳市雷能混合集成电路有限公司 | Digital current control method and device |
| TWI707529B (en) * | 2020-05-05 | 2020-10-11 | 立錡科技股份有限公司 | Switching power conversion circuit and switching circuit |
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| US20020017897A1 (en) * | 1993-03-23 | 2002-02-14 | Linear Technology Corporation | Control circuit and method for maintaining high efficiency over broad current ranges in a switching regulator circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108631586A (en) * | 2018-05-29 | 2018-10-09 | 合肥为民电源有限公司 | A kind of control method and device of generated output power |
| CN108631586B (en) * | 2018-05-29 | 2019-09-13 | 合肥为民电源有限公司 | A kind of control method and device of generated output power |
| CN111176359A (en) * | 2020-01-06 | 2020-05-19 | 深圳市雷能混合集成电路有限公司 | Digital current control method and device |
| CN111176359B (en) * | 2020-01-06 | 2021-07-02 | 深圳市雷能混合集成电路有限公司 | Digital current control method and device |
| TWI707529B (en) * | 2020-05-05 | 2020-10-11 | 立錡科技股份有限公司 | Switching power conversion circuit and switching circuit |
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| Publication number | Publication date |
|---|---|
| CN107222088B (en) | 2019-10-15 |
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