CN107769556A - Synchronous rectification BOOST converter, synchronous commutating control circuit and method - Google Patents
Synchronous rectification BOOST converter, synchronous commutating control circuit and method Download PDFInfo
- Publication number
- CN107769556A CN107769556A CN201711058570.6A CN201711058570A CN107769556A CN 107769556 A CN107769556 A CN 107769556A CN 201711058570 A CN201711058570 A CN 201711058570A CN 107769556 A CN107769556 A CN 107769556A
- Authority
- CN
- China
- Prior art keywords
- input
- unit
- resistance
- output
- output end
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
- H02M3/1588—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load comprising at least one synchronous rectifier element
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The present invention provides a kind of synchronous commutating control circuit and method, wherein, a kind of synchronous commutating control circuit, including exporting detection unit, error amplifying unit, logic control element and drive circuit unit, output detection unit is connected between the output plus terminal of main power cell and the first input end of error amplifying unit, the output end of error amplifying unit and the first input end of logic control element connect, first output end of logic control element, the second output end first input end with drive circuit unit respectively, second input connects, first output end of drive circuit unit, second output end respectively with switching tube M1, M2 grid connection, the 3rd output end drain electrode with switching tube M1 respectively of drive circuit unit, M2 source electrode connection；Also include input detection unit and non-linear modulation unit, the output end of input detection unit is connected with the input of non-linear modulation unit, and the output end of non-linear modulation unit and the second input of logic control element connect.
Description
Technical field
The present invention relates to the synchronous rectification control electricity in switch converters field, more particularly to synchronous rectification BOOST converter
Road and method.
Background technology
As the swift and violent development of field of power electronics causes the more and more extensive of switch converters application, particularly people couple
The switch converters of high power density, high reliability and small size propose more requirements, and the switching loss in converter
The principal element of converter frequency lifting and volume reduction is typically limited, therefore soft switch technique is increasingly by industry
Concern.
It is at present to meet that Sofe Switch characteristic generally selects synchronous rectification BOOST circuits, its schematic diagram in booster converter
As shown in Fig. 1.If synchronous rectification switch pipe M2 turns off the moment, inductance Lm electric current is the forward current (electric current with Fig. 1 signs
IlmDirection is identical), then synchronous rectification BOOST converter main switch M1 is hard switching state, and product efficiency is relatively low.If switching tube
M2 turns off the moment, and inductance Lm electric current is reverse current (the electric current I with Fig. 1 signslmIn the opposite direction), then synchronous rectification BOOST
Converter main switch M1 may realize ZVS characteristics, and product efficiency can be obviously improved.
In the dead time that main switch M1 and synchronous rectification switch pipe M2 are turned off, inductance Lm and switching tube knot are utilized
Electric capacity C1, C2 resonance, when main switch M1 drain-source voltages or electric capacity C1 terminal voltage are in dead time interior resonance to zero
When, switching tube M1 body diode D1 conductings, subsequent switching tube M1 is open-minded, so as to realize main switch M1 ZVS characteristics.Together
The ON time by controlling main switch M1 of sample so that carving inductance Lm when off in switching tube M1 can produce enough
Big forward current, in the dead time that main switch M1 and switching tube M2 are turned off, utilize inductance Lm and switching tube knot electricity
Hold C1, C2 resonance, when switching tube M2 drain-source voltages or electric capacity C2 terminal voltage in dead time interior resonance to zero when, open
Close pipe M2 body diode D2 conductings, subsequent switching tube M2 conductings, so as to realize switching tube M2 ZVS characteristics.Due to main switch
The forward current of pipe M1 shut-off moment inductance is more than the reverse current of switching tube M2 shut-off moment inductance, in switching tube model phase
Together, under conditions of dead time is equal, main switch M1 is more difficult to realize ZVS characteristics compared with switching tube M2.And main switch M1 is real
The key of existing ZVS characteristics is that the reverse current at switching tube M2 shut-off moment inductance Lm is sufficiently large, can ensure that in dead time
Drain-source voltage resonance is to zero.
For Fig. 1 synchronous rectification BOOST converter, conventional control mode be pulse width modulation (hereinafter referred to as
PWM) and pulse frequency modulated (hereinafter referred to as PFM) control mode.
Control block diagram such as traditional PWM voltage mode control modes is as shown in Figure 2.Synchronous rectification BOOST converter is main
Be made up of main power cell 101 and synchronous commutating control circuit, synchronous commutating control circuit mainly by output detection unit 102,
Error amplifying unit 103, logic control element 104, drive circuit unit 105 and pwm unit 106 form, its
In, the input of output detection unit 102 draws the first input end as synchronous commutating control circuit, drive circuit unit
(105) the first output end draws the first output end as synchronous commutating control circuit, and the of drive circuit unit (105)
Two output ends draw the second output end as synchronous commutating control circuit, and the 3rd output end of drive circuit unit (105) is drawn
Go out the 3rd output end as synchronous commutating control circuit.
The circuit connecting relation of synchronous rectification BOOST converter is that output plus terminal and the output of main power cell 101 detect
The input connection of unit 102, export the output end of detection unit 102 and connect with the first input end of error amplifying unit 103
Connect, the input of error amplifying unit 103 second and reference voltage VrefConnection, the output end and logic of error amplifying unit 103
The first input end connection of control unit 104；The output end and logic control element of pulse width modulation (PWM) unit 106
104 the second input connection；First output end of logic control element 104, the second output end respectively with drive circuit unit
105 first input end, the connection of the second input, the first output end of drive circuit unit 105 and main switch M1 grid
Connection, the second output end are connected with switching tube M2 grid, the 3rd output end and main switch M1 drain electrode, switching tube M2 source
Pole connects.
Wherein the pulse signal Ctrl_1 of the first output end output of logic control element 104, the second output end export
Drive signal GM1 that pulse signal Ctrl_2 exports with the first output end of drive circuit unit 105 respectively, the second output end
The drive signal GM2 of output is synchronous.Drive signal GM1 controlling switch pipes M1 turn-on and turn-off, drive signal GM2 controls are opened
Close pipe M2 turn-on and turn-off, the 3rd output end S of drive circuit unit 105wReference edge as drive signal GM2 outputs.
The core concept of PWM voltage mode controls is that output voltage is sampled, by sampled voltage Vo_sWith reference voltage VrefThan
Compensation Modulation signal V is obtained after error amplifier compensates compared with generation error signal, then by error signalea, and by Compensation Modulation
Signal VeaCompared with fixed frequency and the sawtooth oscillation signal Osc of amplitude that pwm unit 106 is sent, enter one
Step obtain pulse signal Ctrl_1, Ctrl_2, pulse signal Ctrl_1, Ctrl_2 controlled after drive circuit main switch M1,
Switching tube M2 turn-on and turn-off.
As shown in figure 3, the work wave of the synchronous commutating control circuit for existing BOOST converter, its test condition are
Under part input voltage in compared with wide input voltage range.Traditional PWM control mode switching frequencies remain constant
(as shown in Figure 4), when input voltage range is wider, the switching tube M2 shut-off moment, the reverse current amplitude I of inductancel_minIn the presence of
Downward trend (as shown in Figure 5) after first rising, under the conditions of portion voltage being present in input voltage range, the reverse electricity of inductance
Flow amplitude Il_minIt is smaller.When the reverse current of inductance is smaller, will be unable to meet in defined dead time by main switch
M1 drain-source voltage resonance is to zero, therefore PWM control mode, when compared with wide input voltage range, part input voltage will
ZVS characteristics can not be realized, so that in compared with wide input voltage range, it is less efficient under the input voltage of part.
Traditional PFM control modes, converter switches frequency is adjusted by detecting output voltage signal, and its frequency is usual
For monotonic increase or the variation tendency of monotone decreasing.When compared with wide input voltage, the monotonic increase of frequency or successively decrease can cause
In whole input voltage range, switching tube M2 turns off the reverse current I of moment inductancel_minLarger fluctuation be present.Frequency dullness is passed
Increase reverse current I when can cause high input voltagel_minAmplitude is too low, it is difficult to realizes ZVS characteristics, efficiency is relatively low；Frequency dullness is passed
Subtract reverse current I when can cause low inputl_minAmplitude is too high, and current effective value is big, and efficiency is relatively low.
The content of the invention
For inductance reverse current in conventional synchronization rectification control mode in synchronous rectification BOOST converter as described above
Il_minThe deficiency that fluctuation is big, current amplitude is higher or lower, present invention generally provides a kind of synchronous commutating control circuit and side
Method, it is allowed to realize ZVS characteristics in compared with wide input voltage range, ensures to compare compared with the efficiency in wide input voltage range
It is higher.Accordingly, the second technical problem to be solved by the present invention is to provide a kind of synchronous rectification BOOST converter.
For product theme, the present invention provides a kind of synchronous commutating control circuit, suitable for the synchronization of Boost
Rectification controls, including output detection unit (102), error amplifying unit (103), logic control element (104) and driving electricity
Road unit (105), the input of output detection unit (102) draw the first input end as synchronous commutating control circuit, use
In the output plus terminal for connecting main power cell, the of the output end of output detection unit (102) and error amplifying unit (103)
One input is connected, and the second input of error amplifying unit (103) is connected with reference voltage, error amplifying unit (103)
Output end is connected with the first input end of logic control element (104), the first output end of logic control element (104), second
The first input end with drive circuit unit (105), the second input are connected output end respectively, drive circuit unit (105)
First output end draws the first output end as synchronous commutating control circuit, for being connected with main switch M1 grid, drives
Second output end of dynamic circuit unit (105) draws the second output end as synchronous commutating control circuit, for it is synchronous whole
Flow tube M2 grid connection, the 3rd output end of drive circuit unit (105) draw the as synchronous commutating control circuit the 3rd
Output end, drain electrode, synchronous rectifier M2 source electrode for the M1 with main switch are connected；Also include input detection unit
(107) and non-linear modulation unit (108), the input extraction of input detection unit (107) are used as synchronous commutating control circuit
The second input, for being connected with the input of main power cell, the output end of input detection unit (107) with it is non-linear
The input connection of modulating unit (108), the of the output end of non-linear modulation unit (108) and logic control element (104)
Two inputs connect.
Preferably, the input detection unit (107), including resistance R1 and resistance R2, resistance R1 one end are with inputting just
End connection, the resistance R1 other end are connected with resistance R2 one end, resistance R2 other end ground connection.
Preferably, the input detection unit (107), including resistance R5, resistance R6 and electric capacity C3 compositions, resistance R5's
One end is connected with resistance R6 one end and main switch M1 source electrode respectively, resistance R5 other end ground connection；The resistance R6 other end
It is connected respectively with electric capacity C3 one end and the input of non-linear modulation unit (108), electric capacity C3 other end ground connection.
The present invention also provides a kind of synchronous rectification BOOST converter, including main power cell (101) and synchronous rectification control
Circuit, synchronous commutating control circuit include output detection unit (102), error amplifying unit (103), logic control element
(104) and drive circuit unit (105), output detection unit (102) are connected to output end and the error amplification of main power cell
Between the first input end of unit (103), the second input of error amplifying unit (103) is connected with reference voltage, and error is put
The output end of big unit (103) is connected with the second input of logic control element (104), and the of logic control element (104)
The first input end with drive circuit unit (105), the second input are connected respectively for one output end, the second output end, driving electricity
First output end of road unit (105) is connected with main switch M1 grid, the second output end of drive circuit unit (105)
It is connected with synchronous rectifier M2 grid, the 3rd output end of drive circuit unit (105) and the M1 of main switch drain electrode,
Synchronous rectifier M2 source electrode connection；The synchronous commutating control circuit also includes input detection unit (107) and non-linear tune
Unit (108) processed, the input of input detection unit (107) are connected with the input of main power cell, input detection unit
(107) output end is connected with the input of non-linear modulation unit (108), the output end of non-linear modulation unit (108) with
The first input end connection of logic control element (104).
Preferably, the input detection unit (107), including resistance R1 and resistance R2, resistance R1 one end are with inputting just
End connection, the resistance R1 other end are connected with resistance R2 one end, resistance R2 other end ground connection.
Preferably, the input detection unit (107), including resistance R5, resistance R6 and electric capacity C3 compositions, resistance R5's
One end is connected with resistance R6 one end and main switch M1 source electrode respectively, resistance R5 other end ground connection；The resistance R6 other end
It is connected respectively with electric capacity C3 one end and the input of non-linear modulation unit (108), electric capacity C3 other end ground connection.
The present invention provides a kind of synchronous rectification BOOST converter again, includes the main power list of synchronous rectification BOOST converter
First (101), output detection unit (102), error amplifying unit (103), logic control element (104) and drive circuit unit
(105), export detection unit (102) to detect the output voltage of main power cell and be supplied to error amplifying unit (103), by mistake
Poor amplifying unit (103) compared with reference voltage after exported comparative result as the first input signal to logic control
Unit (104), logic control element (104) generation output of pulse signal give drive circuit unit (105), drive circuit unit
(105) output drive signal is distinguished to main switch M1 grid and synchronous rectifier M2 grid according to pulse signal；It is described same
Step rectifier control circuit also includes input detection unit (107) and non-linear modulation unit (108), input detection unit (107)
Detect the input signal of main power cell and export and give non-linear modulation unit, non-linear modulation unit (108) carries out non-linear
Exported after modulation using modulated signal as the second input signal to logic control element.
Preferably, the input detection unit (107), is voltage detection unit, including resistance R1 and resistance R2, resistance
R1 one end is connected with input positive terminal, and the resistance R1 other end is connected with resistance R2 one end, resistance R2 other end ground connection；
Or current detecting unit, including resistance R5, resistance R6 and electric capacity C3 compositions, resistance R5 one end respectively with resistance R6 one
The connection of end and main switch M1 source electrode, resistance R5 other end ground connection；The resistance R6 other end respectively with electric capacity C3 one end and
The input connection of non-linear modulation unit (108), electric capacity C3 other end ground connection.
For method theme, the present invention provides a kind of synchronous rectification control method, and sampling generation is carried out to input voltage
Sampled voltage Vin_s, carry out non-linear modulation according to the frequency of sampled voltage Vin_s amplitude switch tube so that fully enter
Under voltage range, when synchronous rectifier turns off, inductance Lm reverse current keeps constant；Wherein, non-linear modulation mode,
It is the frequency of controlling switch pipe and the variation tendency of input voltage, is fully entering in voltage range, in first rises what is declined afterwards
The plots changes that Open Side Down, i.e., increase in low input section, the frequency of switching tube with the increase of input voltage,
Variation tendency is in upward status；In high input voltage section, the frequency of switching tube reduces with the increase of input voltage, and change becomes
Gesture is in decline state.
Preferably, the non-linear modulation mode, the frequency of switching tube and the variation tendency of input voltage are followed such as ShiShimonoseki
It is formula,
Wherein, fswFor converter switches frequency, D is the dutycycle of converter, POFor the power output of converter, K is guarantor
Hold constant constant, LmFor inductance inductance value, tdeadTurned off for the second output GM2 to dead time during the first output GM1 unlatchings,
η be converter efficiency, VinFor input voltage, VoFor output voltage.
The synchronous commutation control device of the present invention is by main power cell 101, output detection unit 102, error amplifying unit
103rd, logic control element 104, drive circuit unit 105, input detection unit 107, non-linear modulation unit 108 form.
Input is just connected with the input of input detection unit 107, the output end and non-linear modulation of input detection unit 107
The input connection of unit 108, the output end of non-linear modulation unit 108 connect with the first input end of logic control element 104
Connect, output is just connected with exporting the input of detection unit 102, exports the output end and error amplifying unit of detection unit 102
103 first input end connection, the second input and reference voltage V of error amplifying unit 103refConnection, error amplification are single
First 103 output end is connected with the second input of logic control element 104, the first output end of logic control element 104,
The first input end with drive circuit unit 105, the second input are connected second output end respectively, drive circuit unit 105
First output end is connected with main switch M1 grid, and the second output end is connected with switching tube M2 grid, the 3rd output end with
The M1 of main switch drain electrode, switching tube M2 source electrode connection.
Wherein the first pulse signal Ctrl_1 of logic control element 104, the second pulse signal Ctrl_2 respectively with driving
The first drive signal GM1, the second drive signal GM2 of circuit unit 105 are synchronous.First drive signal GM1 control main switches M1
Turn-on and turn-off, the second drive signal GM2 controlling switch pipes M2 turn-on and turn-off, the 3rd of drive circuit unit 105 be defeated
Go out the Voltage Reference end that the second drive signal GM2 is made at end.
It is an object of the invention to provide a kind of synchronous commutation control device of non-linear modulation and method, in wider input
During voltage range, its frequency is in nonlinear change, and switching tube M2 turns off the reverse current I of moment inductancel_minKeep not
Become, to ensure meet ZVS characteristics in wide input voltage range, so that the efficiency in whole input voltage range
It is higher.The synchronous commutating control circuit of the present invention, input is sampled by input detection unit 107, when input voltage becomes
Sampled voltage V during changein_sAmplitude respective change.Non-linear modulation unit 108 is according to sampled voltage Vin_sAmplitude to vibration
Signal Osc frequency carries out non-linear modulation so that in compared with wide input voltage range, switching tube M2 shut-off moment inductance
Lm reverse current Il_minKeep constant, it is ensured that ZVS characteristics can be realized in compared with wide input voltage range, so that
The efficiency obtained in whole input voltage range is higher.
Compared with prior art, synchronous rectification control program of the present invention has the advantages that：
1st, compared with wide input voltage range, the reverse current at synchronous rectification switch pipe M2 shut-off moment inductance Lm maintains not
Become, it is ensured that ZVS characteristics can be realized in compared with wide input voltage range；
2nd, compared with wide input voltage range, the virtual value electric current of inductance is smaller and fluctuating range is small；
3rd, compared with wide input voltage range, the efficiency of converter is higher and more stable.
Brief description of the drawings
Fig. 1 is the circuit theory diagrams of the BOOST converter with synchronous rectification；
Fig. 2 is the theory diagram of the existing BOOST converter with synchronous rectification using PWM control modes；
Fig. 3 is that the existing BOOST converter with synchronous rectification is surveyed under compared with wide input voltage range inside points input voltage
Try obtained working waveform figure；
Fig. 4 be switching frequency of the existing BOOST converter with synchronous rectification under the conditions of compared with wide input voltage range with
The changing trend diagram of input voltage；
Fig. 5 is that switching tube M2 of the existing BOOST converter with synchronous rectification under the conditions of compared with wide input voltage range is closed
The reverse current I at disconnected moment inductance Lml_minWith the changing trend diagram of input voltage；
Fig. 6 is the theory diagram that the synchronous commutating control circuit of the embodiment of the present invention one is applied in BOOST converter；
Fig. 7 is that the synchronous commutating control circuit of the embodiment of the present invention one is applied in BOOST converter in wider input electricity
Press the working waveform figure under range of condition；
Fig. 8 is that the synchronous commutating control circuit of the embodiment of the present invention one is applied in BOOST converter in wider input electricity
The changing trend diagram of switching frequency and input voltage under the conditions of pressure；
Fig. 9 is that the synchronous commutating control circuit of the embodiment of the present invention one is applied in BOOST converter in wider input electricity
Press the reverse current I at switching tube M2 shut-off moment inductance Lm under range of conditionl_minWith the changing trend diagram of input voltage；
Figure 10 is that prior art and the efficiency comparative of model machine of the present invention scheme；
Figure 11 is the theory diagram that the synchronous commutating control circuit of the embodiment of the present invention two is applied in BOOST converter.
Embodiment
Embodiment one
As shown in fig. 6, it is applied to principle in BOOST converter for the synchronous commutating control circuit of the embodiment of the present invention one
Block diagram, a kind of synchronous rectification BOOST converter, including main power cell 101 and synchronous commutating control circuit, synchronous rectification control
Circuit processed includes output detection unit 102, error amplifying unit 103, logic control element 104, drive circuit unit 105, defeated
Enter detection unit 107 and non-linear modulation unit 108.Wherein, the input for exporting detection unit 102 is drawn as synchronous whole
The first input end of flow control circuit, the input of input detection unit (107) draw the as synchronous commutating control circuit
Two inputs, the first output end of drive circuit unit (105) draw the first output end as synchronous commutating control circuit,
Second output end of drive circuit unit (105) draws the second output end as synchronous commutating control circuit, drive circuit list
3rd output end of first (105) draws the 3rd output end as synchronous commutating control circuit.
The circuit connecting relation of synchronous rectification BOOST converter of the present invention is, the output plus terminal of main power cell 101 with it is defeated
Go out the input connection of detection unit 102, export the output end of detection unit 102 and the first input of error amplifying unit 103
End connection, the input of error amplifying unit 103 second are connected with reference voltage, the output end and logic of error amplifying unit 103
The first input end connection of control unit 104.The input positive terminal of main power cell 101 and the input of input detection unit 107
Connection, the output end of input detection unit 107 are connected with the input of non-linear modulation unit 108, non-linear modulation unit
108 output end is connected with the second input of logic control element 104.First output end of logic control element 104,
The first input end with drive circuit unit 105, the second input are connected two output ends respectively, and the of drive circuit unit 105
One output end is connected with main switch M1 grid, and the second output end is connected with switching tube M2 grid, the 3rd output end and master
Switch M1 drain electrode, switching tube M2 source electrode connection.
The basic conception of the present invention is, using change of the non-linear modulation mode according to detection signal, converter to be opened
Close frequency and carry out nonlinear modulation so that compared with wide input voltage range, at the switching tube M2 shut-off moment, inductance Lm's is anti-
To electric current Il_minKeep constant, ZVS characteristics can be realized in the full input voltage range of converter.Preferably, in the present embodiment
It is middle to use nonlinear pulse frequency modulated mode (abbreviation PFM).
The operation principle of synchronous rectification BOOST converter of the present invention is as follows：
The sampled input voltage of input detection unit 107, and by sampled signal Vin_sAs the defeated of non-linear modulation unit 108
Enter signal.The pressure sampling circuit that preferable input detection unit can be made up of resistance, resistance R1 one end is with inputting just
Connection, the other end are connected with resistance R2 one end, and the resistance R2 other end is connected with input GND, sampled signal Vin_sFor electricity
Hinder R2 terminal voltage amplitude, when input voltage changes, sampled voltage Vin_sAmplitude voltage change accordingly.
Second input signal of the output signal of non-linear modulation unit 108 as logic control element 104.Non-linear tune
Unit 108 processed is according to sampled signal Vin_sChange the frequency of oscillator signal Osc caused by non-linear modulation unit 105 is entered
Row non-linear modulation.
The sampling and outputting voltage of detection unit 102 is exported, and by sampled voltage Vo_sFirst as error amplifying unit 103
Input signal.
Reference voltage VrefAs the second input signal of error amplifying unit 103, error amplifying unit 103 will sample electricity
Press Vo_sWith reference voltage VrefError voltage compensate amplification after obtain Compensation Modulation signal Vea, Compensation Modulation signal Vea
The first input signal as logic control element 104.
Amplitude and the error amplification for the oscillator signal Osc that logic control element 104 exports non-linear modulation unit 108 are single
The Compensation Modulation signal V of the output of member 103eaIt is compared by internal comparator, produces respective frequencies, duty ratio corresponding and consolidate
Complementary pulse signal Ctrl_1, Ctrl_2 of dead time are determined, wherein the first pulse signal Ctrl_1, the second pulse signal
Ctrl_2 exports to the first input end of drive circuit unit 105, the second input respectively.
Preferable first pulse signal Ctrl_1 is synchronous with the first drive signal GM1 of drive circuit unit 105, the second arteries and veins
Rush that signal Ctrl_1 is synchronous with the second drive signal GM2 of drive circuit unit 105, the 3rd output of drive circuit unit 105
Hold SwVoltage Reference end as the second drive signal GM2.3rd output end SwDrain electrode, switching tube M2 with main switch M1
Source electrode is connected.
Preferable first drive signal GM1 control main switches M1 turn-on and turn-off, the second drive signal GM2 controls are opened
Close pipe M2 turn-on and turn-off.
Synchronous rectification BOOST converter can realize the leakage that the key of ZVS characteristics is main switch M1 in dead time
Source voltage resonance is to zero.Inductance Lm electric currents can be approximately considered in resonant process and maintain Il_minIt is constant.If realizing ZVS characteristics, open
Close pipe M2 shut-off moment, inductance Lm reverse current Il_minNeed to meet
The dutycycle D of BOOST converter meets
If desired ZVS characteristics are realized in wide input voltage range, it is reverse to design inductance in the voltage range of wide input
Electric current Il_minFor constant K
Il_min=K (3)
BOOST converter switching tube M2 turns off moment, inductance Lm reverse current Il_minMeet
Simultaneous formula (3) (4) can calculate fsw
C in formula (1) (2) (3) (4) (5)1、C2The respectively equivalent junction capacitance of switching tube M1, M2 hourglass source electrodes, tdeadFor
Two output GM2 are turned off to dead time during the first output GM1 unlatchings, Il_minFor the reverse current amplitude of inductance, VinFor input
Voltage, VoFor output voltage, D is the dutycycle of converter, POFor the power output of converter, η is the efficiency of converter, LmFor
Inductance inductance value, fswFor converter switches frequency, K is to keep constant constant.
According to formula (5), it is known that under the conditions of compared with wide input voltage range, switching frequency fswWith input voltage VinChange
Change trend is as shown in Figure 8.
According to formula (3), it is known that switching tube M2 turns off moment, inductance Lm reverse current Il_minKeep constant, its electric current
Il_minIt is as shown in Figure 9 with the variation tendency of input voltage.
Reverse current Il_minKeep constant in whole input voltage range and amplitude is enough, it is ensured that wider input electricity
ZVS characteristics can be realized in the range of pressure, so that the efficiency in whole input voltage range is higher.And entirely inputting
In voltage range, the inductance value that allows can be bigger during due to design, diminishes for the current effective value of inductance and creates condition,
Make the current effective value of inductance can be small with smaller and fluctuating range, and it is to have to improved efficiency that the virtual value electric current of inductance is small
Help.
It is with full-load power 20W, input voltage range 100V~200VDC, output voltage 220VDC prototyping testing now
Example, the BOOST converter of the existing synchronous commutating control circuit technology of application is designated as sample one, using synchronous rectification of the present invention
The BOOST converter of control circuit is designated as sample two, and its efficiency is contrasted, and test data contrast table is as shown in table 1 below,
Table 1
It can be seen that from upper table 1, when compared with wide input voltage range, sample two (the present invention program sample) and sample one
(prior art sample) compares, low pressure input and during high input voltage sample two than sample one improved efficiency about
4%~5%, electric current I in its reason full voltage range that has been circuit realiration of the present inventionl_minIt is constant, then can be in full voltage range
Inside realize ZVS characteristics.And prior art circuits because low pressure input, high input voltage when Il_minIt is smaller, ZVS characteristics, portion can not be realized
The efficiency of component voltage section is relatively low.The efficiency comparative of prior art and inventive samples figure is as shown in Figure 10, wherein, the table of curve 600
Show the efficiency of prior art (PWM mode) sample, curve 800 represents the efficiency of (PFM modes) sample of the invention.
Embodiment two
As shown in figure 11, the synchronous commutating control circuit of specific embodiment two for the present invention is applied in BOOST converter
Theory diagram, the input detection unit 107 unlike embodiment one is input electric cur- rent measure.The detection electricity of input current
Road is simple and can detect real-time inductive current, so that the precision of FREQUENCY CONTROL is higher.
Preferably, input detection unit 107 can be made up of resistance R5, resistance R6, electric capacity C3, resistance R5 one end with
One end connection of main switch M1 source electrode, resistance R6, the resistance R5 other end are connected with input GND, the resistance R6 other end and
Electric capacity C3 one end, the input connection of non-linear modulation unit 108, the electric capacity C3 other end are connected with input GND.Electric capacity
Output signal V of the C3 terminal voltage as input detection unitin_s.Resistance R5 is converted to the triangular current signal of inductance
The voltage signal of triangular wave, then the filter network being made up of resistance R6, electric capacity C3, obtain a voltage signal Vin_s.It is non-thread
The foundation V of property modulating unit 108in_sVoltage non-linear modulation, its implementation principle and the phase of example one are carried out to converter frequency
Together.
Claims (10)
1. a kind of synchronous commutating control circuit, the synchronous rectification suitable for Boost controls, including output detection unit
(102), error amplifying unit (103), logic control element (104) and drive circuit unit (105), detection unit is exported
(102) input draws the first input end as synchronous commutating control circuit, the output end of output detection unit (102) and
The first input end connection of error amplifying unit (103), the second input and the reference voltage of error amplifying unit (103) connect
Connect, the output end of error amplifying unit (103) is connected with the first input end of logic control element (104), logic control element
(104) first input end with drive circuit unit (105), the second input connect the first output end, the second output end respectively
Connect, the first output end of drive circuit unit (105) draws the first output end as synchronous commutating control circuit, drive circuit
Second output end of unit (105) draws the second output end as synchronous commutating control circuit, drive circuit unit (105)
3rd output end draws the 3rd output end as synchronous commutating control circuit, it is characterised in that：
Also include input detection unit (107) and non-linear modulation unit (108), the input of input detection unit (107) draws
Go out the second input as synchronous commutating control circuit, output end and the non-linear modulation unit of input detection unit (107)
(108) input connection, the output end of non-linear modulation unit (108) and the second input of logic control element (104)
Connection.
2. synchronous rectification BOOST converter according to claim 1, it is characterised in that：The input detection unit
(107), including resistance R1 and resistance R2, resistance R1 one end are connected with input positive terminal, and the resistance R1 other end is with resistance R2's
One end connects, resistance R2 other end ground connection.
3. synchronous rectification BOOST converter according to claim 1, it is characterised in that：The input detection unit
(107), including resistance R5, resistance R6 and electric capacity C3 compositions, resistance R5 one end one end with resistance R6 and main switch M1 respectively
Source electrode connection, resistance R5 the other end ground connection；The resistance R6 other end one end with electric capacity C3 and non-linear modulation list respectively
The input connection of first (108), electric capacity C3 other end ground connection.
4. a kind of synchronous rectification BOOST converter, including main power cell (101) and synchronous commutating control circuit, synchronous rectification
Control circuit includes output detection unit (102), error amplifying unit (103), logic control element (104) and drive circuit list
It is first defeated to be connected to the output end of main power cell and error amplifying unit (103) for first (105), output detection unit (102)
Between entering end, the second input of error amplifying unit (103) is connected with reference voltage, the output of error amplifying unit (103)
End is connected with the second input of logic control element (104), the first output end of logic control element (104), the second output
The first input end with drive circuit unit (105), the second input are connected respectively at end, and the first of drive circuit unit (105)
Output end is connected with main switch M1 grid, the second output end of drive circuit unit (105) and synchronous rectifier M2 grid
Pole connects, and the 3rd output end of drive circuit unit (105) and the M1 of main switch drain electrode, synchronous rectifier M2 source electrode connect
Connect, it is characterised in that：
The synchronous commutating control circuit also includes input detection unit (107) and non-linear modulation unit (108), input detection
The input of unit (107) is connected with the input of main power cell, output end and the non-linear tune of input detection unit (107)
The input connection of unit (108) processed, the output end of non-linear modulation unit (108) and the first of logic control element (104)
Input connects.
5. synchronous rectification BOOST converter according to claim 1, it is characterised in that：The input detection unit
(107), including resistance R1 and resistance R2, resistance R1 one end are connected with input positive terminal, and the resistance R1 other end is with resistance R2's
One end connects, resistance R2 other end ground connection.
6. synchronous rectification BOOST converter according to claim 1, it is characterised in that：The input detection unit
(107), including resistance R5, resistance R6 and electric capacity C3 compositions, resistance R5 one end one end with resistance R6 and main switch M1 respectively
Source electrode connection, resistance R5 the other end ground connection；The resistance R6 other end one end with electric capacity C3 and non-linear modulation list respectively
The input connection of first (108), electric capacity C3 other end ground connection.
7. a kind of synchronous rectification BOOST converter, including the main power cell (101) of synchronous rectification BOOST converter, output inspection
Unit (102), error amplifying unit (103), logic control element (104) and drive circuit unit (105) are surveyed, output detection is single
The output voltage that first (102) detect main power cell is simultaneously supplied to error amplifying unit (103), error amplifying unit (103) with
Comparative result is exported and gives logic control element (104), logic control by reference voltage after being compared as the first input signal
Unit (104) generation output of pulse signal gives drive circuit unit (105), and drive circuit unit (105) is distinguished according to pulse signal
Output drive signal is to main switch M1 grid and synchronous rectifier M2 grid, it is characterised in that：
The synchronous commutating control circuit also includes input detection unit (107) and non-linear modulation unit (108),
Input detection unit (107), which detects the input signal of main power cell and exported, gives non-linear modulation unit, non-linear tune
Unit (108) processed is exported to logic control element after carrying out non-linear modulation using modulated signal as the second input signal.
8. synchronous rectification BOOST converter according to claim 7, it is characterised in that：The input detection unit
(107), it is voltage detection unit, including resistance R1 and resistance R2, resistance R1 one end are connected with input positive terminal, resistance R1's is another
One end is connected with resistance R2 one end, resistance R2 other end ground connection；Or current detecting unit, including resistance R5, resistance R6
Formed with electric capacity C3, resistance R5 one end is connected with resistance R6 one end and main switch M1 source electrode respectively, and resistance R5's is another
End ground connection；The resistance R6 other end is connected with electric capacity C3 one end and the input of non-linear modulation unit (108) respectively, electric capacity
C3 other end ground connection.
9. a kind of synchronous rectification control method, sampling generation sampled voltage Vin_s is carried out to input voltage, according to sampled voltage Vin_
The frequency of s amplitude switch tube carries out non-linear modulation so that fully enters under voltage range, is turned off in synchronous rectifier
When, inductance Lm reverse current Il_minKeep constant；Wherein, non-linear modulation mode, it is frequency and the input of controlling switch pipe
The variation tendency of voltage, fully entering in voltage range, declining the plots changes that Open Side Down afterwards in first rising, i.e.,
In low input section, the frequency of switching tube increases with the increase of input voltage, and variation tendency is in upward status；Inputted in height
Voltage section, the frequency of switching tube reduce with the increase of input voltage, and variation tendency is in decline state.
10. synchronous rectification control method according to claim 9, it is characterised in that：The non-linear modulation mode, switch
The frequency of pipe and the variation tendency of input voltage follow following relational expression,
<mrow>
<msub>
<mi>f</mi>
<mrow>
<mi>s</mi>
<mi>w</mi>
</mrow>
</msub>
<mo>=</mo>
<mfrac>
<mrow>
<mn>1</mn>
<mo>-</mo>
<mi>D</mi>
</mrow>
<mrow>
<mo>(</mo>
<mfrac>
<msub>
<mi>P</mi>
<mi>o</mi>
</msub>
<mrow>
<mi>&eta;</mi>
<mo>*</mo>
<msub>
<mi>V</mi>
<mrow>
<mi>i</mi>
<mi>n</mi>
</mrow>
</msub>
</mrow>
</mfrac>
<mo>-</mo>
<mi>K</mi>
<mo>)</mo>
<mo>*</mo>
<mfrac>
<mrow>
<mn>2</mn>
<msub>
<mi>L</mi>
<mi>m</mi>
</msub>
</mrow>
<mrow>
<msub>
<mi>V</mi>
<mi>o</mi>
</msub>
<mo>-</mo>
<msub>
<mi>V</mi>
<mrow>
<mi>i</mi>
<mi>n</mi>
</mrow>
</msub>
</mrow>
</mfrac>
<mo>+</mo>
<msub>
<mi>t</mi>
<mrow>
<mi>d</mi>
<mi>e</mi>
<mi>a</mi>
<mi>d</mi>
</mrow>
</msub>
</mrow>
</mfrac>
<mo>,</mo>
</mrow>
Wherein, fswFor converter switches frequency, D is the dutycycle of converter, POFor the power output of converter, K is to keep not
The constant of change, LmFor inductance inductance value, tdeadTurned off for the second output GM2 to dead time during the first output GM1 unlatchings, η is change
The efficiency of parallel operation, VinFor input voltage, VoFor output voltage.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711058570.6A CN107769556B (en) | 2017-11-01 | 2017-11-01 | Synchronous rectification BOOST converter, synchronous commutating control circuit |
| PCT/CN2018/096046 WO2019085548A1 (en) | 2017-11-01 | 2018-07-18 | Synchronous rectification boost converter, and synchronous rectification control circuit and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711058570.6A CN107769556B (en) | 2017-11-01 | 2017-11-01 | Synchronous rectification BOOST converter, synchronous commutating control circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107769556A true CN107769556A (en) | 2018-03-06 |
| CN107769556B CN107769556B (en) | 2019-09-10 |
Family
ID=61272110
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711058570.6A Active CN107769556B (en) | 2017-11-01 | 2017-11-01 | Synchronous rectification BOOST converter, synchronous commutating control circuit |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN107769556B (en) |
| WO (1) | WO2019085548A1 (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108494232A (en) * | 2018-05-07 | 2018-09-04 | 电子科技大学 | A kind of synchronous commutating control circuit for preventing electric current from pouring in down a chimney |
| CN108494276A (en) * | 2018-05-07 | 2018-09-04 | 电子科技大学 | A kind of synchronous rectification driving circuit |
| CN108566104A (en) * | 2018-05-07 | 2018-09-21 | 电子科技大学 | A kind of synchronous commutating control circuit |
| CN108631590A (en) * | 2018-04-26 | 2018-10-09 | 成都芯源系统有限公司 | Voltage converter, controller and control method thereof |
| WO2019085548A1 (en) * | 2017-11-01 | 2019-05-09 | 广州金升阳科技有限公司 | Synchronous rectification boost converter, and synchronous rectification control circuit and method |
| CN111313677A (en) * | 2020-04-01 | 2020-06-19 | 南通大学 | Method for setting dead zone of synchronous working type SiC MOSFET Boost DC-DC converter |
| CN112994459A (en) * | 2021-04-26 | 2021-06-18 | 西安拓尔微电子有限责任公司 | Power supply circuit and control method thereof |
| WO2023015523A1 (en) * | 2021-08-12 | 2023-02-16 | 华为技术有限公司 | Voltage conversion apparatus having current equalization function, current equalization method and apparatus, and medium |
| WO2023020607A1 (en) * | 2021-08-20 | 2023-02-23 | 深圳市新思电能科技有限责任公司 | Synchronous coupling boost circuit, boost circuit and power supply apparatus |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1622437A (en) * | 2003-11-27 | 2005-06-01 | 株式会社理光 | Switching regulator |
| CN201063541Y (en) * | 2007-07-30 | 2008-05-21 | 重庆鹏阳电子科技有限公司 | High-frequency highly effective boosting DC/DC converter |
| CN104578772A (en) * | 2014-12-26 | 2015-04-29 | 福建联迪商用设备有限公司 | Boosting circuit |
| CN105119493A (en) * | 2015-09-21 | 2015-12-02 | 西安三馀半导体有限公司 | DC-DC converter |
| US20160085251A1 (en) * | 2014-09-24 | 2016-03-24 | Rohm Co., Ltd. | Power supply device |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4374033B2 (en) * | 2007-02-26 | 2009-12-02 | 株式会社ルネサステクノロジ | Switching power supply circuit |
| US7936152B2 (en) * | 2007-07-09 | 2011-05-03 | Fuji Electric Systems Co., Ltd. | Switching power source |
| CN101459381B (en) * | 2008-12-10 | 2010-08-11 | 浙江大学 | Control apparatus and method for Boost type switch converter |
| CN106067733A (en) * | 2016-07-08 | 2016-11-02 | 西南交通大学 | A kind of switch converters non-linear modulation voltage mode control device and method |
| CN106374739B (en) * | 2016-11-18 | 2018-07-31 | 贵州恒芯微电子科技有限公司 | A kind of circuit of synchronous rectification |
| CN107769556B (en) * | 2017-11-01 | 2019-09-10 | 广州金升阳科技有限公司 | Synchronous rectification BOOST converter, synchronous commutating control circuit |
-
2017
- 2017-11-01 CN CN201711058570.6A patent/CN107769556B/en active Active
-
2018
- 2018-07-18 WO PCT/CN2018/096046 patent/WO2019085548A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1622437A (en) * | 2003-11-27 | 2005-06-01 | 株式会社理光 | Switching regulator |
| CN201063541Y (en) * | 2007-07-30 | 2008-05-21 | 重庆鹏阳电子科技有限公司 | High-frequency highly effective boosting DC/DC converter |
| US20160085251A1 (en) * | 2014-09-24 | 2016-03-24 | Rohm Co., Ltd. | Power supply device |
| CN104578772A (en) * | 2014-12-26 | 2015-04-29 | 福建联迪商用设备有限公司 | Boosting circuit |
| CN105119493A (en) * | 2015-09-21 | 2015-12-02 | 西安三馀半导体有限公司 | DC-DC converter |
Non-Patent Citations (2)
| Title |
|---|
| WAN-RONE LIOU等: "A synchronous boost regulator with PWM/PFM mode operation", 《2009 IEEE 8TH INTERNATIONAL CONFERENCE ON ASIC》 * |
| 魏海龙等: "一种单片高效开关DC/DC转换器的设计与实现", 《武汉大学学报》 * |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019085548A1 (en) * | 2017-11-01 | 2019-05-09 | 广州金升阳科技有限公司 | Synchronous rectification boost converter, and synchronous rectification control circuit and method |
| CN108631590A (en) * | 2018-04-26 | 2018-10-09 | 成都芯源系统有限公司 | Voltage converter, controller and control method thereof |
| CN108631590B (en) * | 2018-04-26 | 2020-11-17 | 成都芯源系统有限公司 | Voltage converter, controller and control method thereof |
| CN108494232A (en) * | 2018-05-07 | 2018-09-04 | 电子科技大学 | A kind of synchronous commutating control circuit for preventing electric current from pouring in down a chimney |
| CN108494276A (en) * | 2018-05-07 | 2018-09-04 | 电子科技大学 | A kind of synchronous rectification driving circuit |
| CN108566104A (en) * | 2018-05-07 | 2018-09-21 | 电子科技大学 | A kind of synchronous commutating control circuit |
| CN108494276B (en) * | 2018-05-07 | 2019-10-18 | 电子科技大学 | A kind of synchronous rectification driving circuit |
| CN111313677A (en) * | 2020-04-01 | 2020-06-19 | 南通大学 | Method for setting dead zone of synchronous working type SiC MOSFET Boost DC-DC converter |
| CN111313677B (en) * | 2020-04-01 | 2021-08-27 | 南通大学 | Method for setting dead zone of synchronous working type SiC MOSFET Boost DC-DC converter |
| CN112994459A (en) * | 2021-04-26 | 2021-06-18 | 西安拓尔微电子有限责任公司 | Power supply circuit and control method thereof |
| WO2023015523A1 (en) * | 2021-08-12 | 2023-02-16 | 华为技术有限公司 | Voltage conversion apparatus having current equalization function, current equalization method and apparatus, and medium |
| WO2023020607A1 (en) * | 2021-08-20 | 2023-02-23 | 深圳市新思电能科技有限责任公司 | Synchronous coupling boost circuit, boost circuit and power supply apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107769556B (en) | 2019-09-10 |
| WO2019085548A1 (en) | 2019-05-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107769556A (en) | Synchronous rectification BOOST converter, synchronous commutating control circuit and method | |
| CN107017780B (en) | A kind of the isolated form DC-DC boost converter and its control method of band pull-up active clamp branch | |
| CN103675426B (en) | Inductive current zero-crossing detection method, circuit and switch power supply with circuit | |
| CN106411142A (en) | LLC resonant converter with wide load range | |
| CN106849686B (en) | Bicyclic fixed-frequency control method based on BUCK-LLC two-stage DC/DC converters | |
| CN102801329A (en) | High-efficiency and low-loss AC/DC (Alternating Current/Direct Current) power supply circuit and control method thereof | |
| CN103036405B (en) | Synchronous rectification switching tube driving method and device of phase-shifted full-bridge circuit | |
| CN101312330A (en) | High voltage power source of resonant transformer | |
| CN110224599A (en) | A kind of multiphase buck-boost alternation parallel DC/DC translation circuit | |
| CN102931838A (en) | Slope compensation method for voltage-type hysteresis loop control switching converter and device thereof | |
| CN206099766U (en) | Adjustable output's soft switching power converter of active PFC+ | |
| CN107769541A (en) | LCC resonance buffer-type two-way DC converters and its frequency modulation soft start control method | |
| CN106787771A (en) | A kind of controlled resonant converter | |
| CN106787757A (en) | A kind of CLTCL resonance DCs converter | |
| CN201199674Y (en) | High-voltage power supply apparatus for resonant converter | |
| CN106059294A (en) | Output-power-adjustable active PFC+ soft switch power converter and conversion method thereof | |
| Rajakumari et al. | Comparative analysis of DC-DC converters | |
| CN107565814A (en) | A kind of quasi- Z source switch boosting inverters of high-gain suitable for fuel cell power generation | |
| CN102522912B (en) | Bipolar SPWM (Sinusoidal Pulse Width Modulation) type adaptive dead-zone compensation method | |
| CN107231086A (en) | A kind of soft-start method and its circuit of resonance DC transformer | |
| CN102857109A (en) | High-power LLC (logical link control) resonant full-bridge converter based on DSP (digital signal processor) | |
| CN104022672A (en) | Self-adaptive adjustable delay circuit for soft-switch ZVT (zero voltage transformation) converter | |
| CN203039585U (en) | Critical continuous mode unity power factor flyback converter | |
| CN116131596B (en) | Hybrid mode power factor correction converter and control method thereof | |
| CN111600366B (en) | Soft start method for vehicle charger |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |