CN107834849A - Switching power source control circuit and control method - Google Patents
Switching power source control circuit and control method Download PDFInfo
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- CN107834849A CN107834849A CN201711067108.2A CN201711067108A CN107834849A CN 107834849 A CN107834849 A CN 107834849A CN 201711067108 A CN201711067108 A CN 201711067108A CN 107834849 A CN107834849 A CN 107834849A
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- 238000000034 method Methods 0.000 title claims abstract description 9
- 230000033228 biological regulation Effects 0.000 claims abstract description 61
- 230000005611 electricity Effects 0.000 claims description 5
- 241000208340 Araliaceae Species 0.000 claims description 3
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 claims description 3
- 235000003140 Panax quinquefolius Nutrition 0.000 claims description 3
- 235000008434 ginseng Nutrition 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 8
- 230000000630 rising effect Effects 0.000 description 5
- 239000003990 capacitor Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003831 deregulation Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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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
- 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
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Abstract
The invention discloses a kind of switching power source control circuit and control method, including the first regulation circuit or/and the second regulation circuit, the first regulation circuit, the first voltage signal of main switch and the public terminal voltage of auxiliary switch pipe will be characterized compared with the first reference signal, obtain the first comparison signal, whether first comparison signal characterizes adjusts the first dead time, and first dead time is the time for the main switch shut-off moment moment being opened to auxiliary switch pipe；The second regulation circuit, the first voltage signal of main switch and the public terminal voltage of auxiliary switch pipe will be characterized compared with the second reference signal, obtain the second comparison signal, whether second comparison signal characterizes adjusts the second dead time, and switching tube shut-off moment to main switch opens the time at moment supplemented by second dead time.For the present invention when adjusting dead time, response is fast, and reliability is high.
Description
Technical field
The present invention relates to a kind of electric and electronic technical field, more particularly to a kind of switching power source control circuit and controlling party
Method.
Background technology
In Switching Power Supply, it is related to the occasion of Synchronization Control, the phenomenon straight-through due to switching tube can not occur, so needing
Dead time is set.Two switching tubes of Synchronization Control can not simultaneously turn on, and the situation of short circuit otherwise just occurs.In order that open
Pipe reliable operation is closed, is avoided because turn-off delay effect causes two switching tubes to lead directly to, it is necessary to dead time is set, that is,
The time that two switching tubes simultaneously turn off.The switching tube that dead time can be effectively prevented from caused by postponing effect is not complete
Shut-off, and another switching tube is in the conduction state.But dead time is long to reduce power supply delivery efficiency, can to control
Circuit is interfered so as to influence circuit normal work, and generation latch-up causes circuit malfunction.
In the prior art, exemplified by adjusting Buck circuit dead times, with reference to shown in figure 1, the dead band regulation of prior art
Circuit includes first comparator U01, the second comparator U02 and control circuit U03.Buck circuits include upper tube M1, down tube M2, electricity
Sense L and electric capacity C, described upper tube M1 one end are connected with down tube M2 one end, and its public terminal voltage is Vsw, and another terminations of upper tube M1 are defeated
Enter voltage Vin, down tube M2 other ends ground connection.Inductance L one end connects Vsw, another termination capacitor C one end, another terminations of electric capacity C
Ground.First comparator U01 normal phase input ends receive Buck circuit down tube M2 gate voltage signal Vgb, and negative-phase input receives base
Calibration signal 0, export the first comparison signal；Second comparator normal phase input end receives Vsw voltage signals, and negative-phase input receives ginseng
Vref is examined, exports the second comparison signal.The control circuit U03 receives the first comparison signal and the second comparison signal, output control
The control signal of upper, lower tube M1, M2 break-make processed, and then control the dead time between upper, lower tube M1 and M2.
When the grid voltage Vgb of down tube drops to 0, open upper tube so as to set down tube shut-off the moment and upper tube open when
Dead time between quarter；When voltage Vsw at upper, lower tube common port is dropped to reference to Vref, down tube is opened so as to set
Upper tube shut-off moment and down tube open the dead time between the moment.This switching power source control circuit has very big delay,
And dead time can change with the change of temperature and technique, cause the uniformity between chip poor, circuit reliability is poor.
The content of the invention
In view of this, it is existing for solving it is an object of the invention to provide a kind of switching power source control circuit and control method
There are dead band regulation delay, the technical problem of circuit reliability difference existing for technology.
To achieve the above object, the invention provides a kind of switching power source control circuit, including：
First regulation circuit or/and the second regulation circuit；
The first regulation circuit, the first voltage signal and the of main switch and the public terminal voltage of auxiliary switch pipe will be characterized
One reference signal compares, and obtains the first comparison signal, first comparison signal characterizes whether adjust the first dead time, described
First dead time is the time for the main switch shut-off moment moment being opened to auxiliary switch pipe；
The second regulation circuit, the first voltage signal and the of main switch and the public terminal voltage of auxiliary switch pipe will be characterized
Two reference signals compare, and obtain the second comparison signal, second comparison signal characterizes whether adjust the second dead time, described
Switching tube shut-off moment to main switch opens the time at moment supplemented by second dead time
Optionally, the first regulation circuit includes first comparator, the first comparator first end reception described the
One voltage signal, the second end receive first reference signal, within a period of time after main switch turns off the moment, to first
Voltage signal and the first reference signal are compared to export first comparison signal；If the first comparison signal judge need into
The dead time of row first is adjusted, then adjusts the main switch shut-off moment or auxiliary switch pipe opens the moment.
Optionally, the first regulation circuit also includes the first impulse generator, and first impulse generator receives master
The pwm signal of switching tube, the first pulse signal is exported, after the first pulse signal pulsewidth characterizes the main switch shut-off moment
For a period of time.
Optionally, the first regulation circuit also includes first and door, described first compared with door reception described first letter
Number and first pulse signal, export the first logical signal.
Optionally, when the first regulation circuit also opens moment or/and main switch shut-off including regulation auxiliary switch pipe
The first adjustment module carved, first adjustment module receive auxiliary switch pipe pwm signal or/and main switch pwm signal and institute
The first logical signal is stated, the auxiliary switch pipe of output the first dead time of regulation opens Regulate signal or/and main switch shut-off is adjusted
Save signal.
Optionally, the second regulation circuit includes the second comparator, the second comparator first end reception described the
One voltage signal, the second end receive second reference signal, within a period of time after auxiliary switch pipe turns off the moment, to first
Voltage signal and the second reference signal are compared to export second comparison signal；If the second comparison signal judge need into
The dead time of row second is adjusted, then adjusts the auxiliary switch pipe shut-off moment or main switch opens the moment.
Optionally, the second regulation circuit also includes the second impulse generator, and second impulse generator receives auxiliary
The pwm signal of switching tube, the second pulse signal is exported, after the second pulse signal pulsewidth characterizes the auxiliary switch pipe shut-off moment
For a period of time.
Optionally, the second regulation circuit also includes second and door, described second compared with door reception described second letter
Number and second pulse signal, export the second logical signal.
Optionally, when the second regulation circuit is also opened including regulation auxiliary switch pipe shut-off moment or/and main switch
The second adjustment module carved, second adjustment module receive auxiliary switch pipe pwm signal or/and main switch pwm signal and institute
The second logical signal is stated, the auxiliary switch pipe of output the second dead time of regulation opens Regulate signal or/and main switch shut-off is adjusted
Save signal.
Optionally, the on-off circuit also includes logic circuit, and it is open-minded that described logic circuit receives the auxiliary switch pipe
Regulate signal or/and auxiliary switch pipe shut-off Regulate signal or/and main switch shut-off Regulate signal or/and the master
Switching tube opens Regulate signal, exports the pwm signal of auxiliary switch pipe and the pwm signal of main switch.
The present invention also provides a kind of Switching Power Supply control method：
By the first voltage signal for characterizing main switch and the public terminal voltage of auxiliary switch pipe compared with the first reference signal, obtain
To the first comparison signal, whether first comparison signal characterizes adjusts the first dead time, based on first dead time
The switching tube shut-off moment opens the time at moment to auxiliary switch pipe；The of main switch and the public terminal voltage of auxiliary switch pipe will be characterized
One voltage signal obtains the second comparison signal compared with the second reference signal, and whether second comparison signal characterizes adjusts the
Two dead times, switching tube shut-off moment to main switch opens the time at moment supplemented by second dead time.
Compared with prior art, the technical scheme of the present invention has advantages below：Main switch and auxiliary switch pipe will be characterized
The first voltage signal of public terminal voltage obtains the first comparison signal, first comparison signal compared with the first reference signal
Whether sign adjusts the first dead time；The first voltage signal and the of main switch and the public terminal voltage of auxiliary switch pipe will be characterized
Two reference signals compare, and obtain the second comparison signal, and second comparison signal characterizes whether adjust the second dead time；Regulation
During the first dead time, only auxiliary switch pipe can be adjusted to open the moment, can also only adjust shut-off moment of main switch, can be with
Opening moment and the shut-off moment of main switch for auxiliary switch is adjusted simultaneously, and the second dead time of regulation is similarly.The present invention is adjusting
Be not in delay when saving delay time, be not in uniformity difference and the problem of circuit reliability difference between chip.
Brief description of the drawings
Fig. 1 is prior art switching power source control circuit structural representation；
Fig. 2 is the dead band schematic diagram in Switching Power Supply；
Fig. 3 is switching power source control circuit structural representation of the present invention；
Fig. 4 is the first regulation electrical block diagram in Fig. 3；
Fig. 5 is the second regulation electrical block diagram in Fig. 3；
Fig. 6 is that Switching Power Supply dead band of the present invention adjusts waveform diagram；
Embodiment
The preferred embodiments of the present invention are described in detail below in conjunction with accompanying drawing, but the present invention is not restricted to these
Embodiment.The present invention covers any replacement made in the spirit and scope of the present invention, modification, equivalent method and scheme.
Thoroughly understand in order that the public has to the present invention, be described in detail in present invention below preferred embodiment specific
Details, and description without these details can also understand the present invention completely for a person skilled in the art.
More specifically description is of the invention by way of example referring to the drawings in the following passage.It should be noted that accompanying drawing is adopted
Non- accurately ratio is used with more simplified form and, only to convenience, lucidly aid in illustrating the embodiment of the present invention
Purpose.
As shown in Fig. 2 illustrating the dead band schematic diagram in Switching Power Supply of the present invention, switching tube pulsewidth is adjusted supplemented by wherein PWML
Waveform processed, PWMH are main switch pulse-width modulation waveform, and Vsw is the voltage waveform at main switch and auxiliary switch pipe common port,
Vrefl, Vref2 are the first reference signal and the second reference signal.When time when PWML and PWMH is low level is dead band
Between, i.e., time that main and auxiliary switching tube simultaneously turns off, main switch turns off the time opened to auxiliary switch pipe when being the first dead band
Between, it is the second dead time that auxiliary switch pipe, which turns off the time opened to main switch,.
As shown in figure 3, illustrating switching power source control circuit structural representation of the present invention, the Switching Power Supply is with Buck electricity
Exemplified by road, the control circuit includes the first regulation circuit U 301, second and adjusts circuit U 302 and logic circuit U303.It is described
Buck circuits include upper tube M1, down tube M2, inductance L and electric capacity C, described upper tube M1 one end and are connected with down tube M2 one end, and its is public
Terminal voltage is first voltage Vsw, another termination input voltage vins of upper tube M1, down tube M2 other ends ground connection.Inductance L one end connects
Vsw, another termination capacitor C one end, electric capacity C other ends ground connection.The first regulation circuit U 301 and the second regulation circuit
U302 receives PWML signals, PWMH signals and voltage Vsw respectively, the first regulation circuit output PWML1 signals or/and
PWMH1 signals, the second regulation circuit output PWML2 signals or/and PWMH2 signals；Described in the logic circuit U303 is received
PWML1 signals or/and the PWMH1 signals or/and PWML2 signals or/and the PWMH2 signals, output auxiliary switch pipe M2 and
Main switch M1 pwm signal.By adjust main switch M1 or/and the last switch periods of auxiliary switch pipe M2 pwm signal come
The pwm signal of main switch M1 or/and auxiliary switch pipe M2 current switch periods is obtained, and then the switch of de-regulation Buck circuits is dead
Area's time.The PWML signals and PWMH signals are respectively the last switches of last switch periods auxiliary switch pipe M2 and main switch M1
The pwm signal in cycle, the PWML1 signals and the PWML2 signals are respectively that PWML signals rising edge and PWML signals decline
Signal along after regulation, i.e. auxiliary switch pipe M2's opens Regulate signal and shut-off Regulate signal, PWMH1 signals and described
PWMH2 signals are respectively the shut-off of the signal, i.e. main switch M1 after PWMH signals trailing edge and the regulation of PWMH signals rising edge
Regulate signal and open Regulate signal.
As shown in figure 4, the first regulation electrical block diagram in Fig. 3 is illustrated, including the first comparison circuit U401, first
Impulse generator U402, first and door U403 and auxiliary switch pipe are opened or/and main switch shut-off regulation circuit U 404.Described
One comparison circuit U401 normal phase input ends receive the first reference signal Vrefl, inverting input input first voltage signal Vsw,
Export the first comparison signal comp1；First impulse generator U402 the input signal PWMH, output pulse signal pulse1；
It is described to receive the first comparison signal comp1 and the first pulse signal pulse1 with door U403, export the first logical signal
logic1；The regulation circuit U 404 receives auxiliary switch pipe M2 or/and the pulsewidth modulation letter of the last switch periods of main switch M1
Number PWML or/and PWMH and the first logical signal logic1, output auxiliary switch pipe open Regulate signal PWML1 or/and main switch
Pipe shut-off Regulate signal PWMH1.
When the first reference signal Vref1 is more than first voltage signal Vsw, comparator U401 output high level signals
comp1；When trailing edge occurs in main switch M1 pulse-modulated signals PWMH, the first impulse generator U402 exports one high electricity
Flat pulse signal pulse1, the pulse signal pulse1 pulsewidths characterize PWMH signals and a period of time after trailing edge occur；When
When signal comp1 and signal pulse1 is high level, i.e., in the first dead time, exist one section of Vrefl more than Vsw when
Between, that is, show that the first dead time (reference picture 2) is long.First receives high level signal comp1 and pulse with door U403, defeated
Go out high level logic signal logicl, control PWML signals rising edge to export in advance (in reference picture 6 by adjusting circuit U 404
PWML1 waveforms) or/and PWMH trailing edge delay output, that is, reduce the first dead time.
As shown in figure 5, the second regulation electrical block diagram in Fig. 3 is illustrated, including the second comparison circuit U501, second
Impulse generator U502, second and door U503 and the shut-off of auxiliary switch pipe or/and main switch open regulation circuit U 504.Described
Two comparison circuit U501 normal phase input ends receive the second reference signal Vref2, inverting input input first voltage signal Vsw,
Export the second comparison signal comp2；Second impulse generator U502 the input signal PWML, output pulse signal pulse2；
It is described to receive the second comparison signal comp2 and the second pulse signal pulse2 with door U503, export the first logical signal
logic2；The regulation circuit U 504 receives auxiliary switch pipe M2 or/and the pulsewidth modulation letter of the last switch periods of main switch M1
Number PWML or/and PWMH and the first logical signal logic1, output auxiliary switch pipe shut-off Regulate signal PWML1 or/and main switch
Pipe opens Regulate signal PWMH1.
When the second reference signal Vref2 is more than first voltage signal Vsw, comparator U501 output high level signals
comp2；When trailing edge occurs in auxiliary switch pipe M2 pulse-width signals PWML, the second impulse generator U502 exports one high electricity
Flat pulse signal pulse2, the pulse signal pulse2 pulsewidth characterize PWML signals and a period of time after trailing edge occur；
When signal comp2 and signal pulse2 are high level, i.e., in the second dead time, one section of Vref2 be present more than Vsw's
Time, that is, show that the second dead time (reference picture 2) is long.Second receives high level signal comp2 and pulse2 with door U503,
High level logic signal logic2 is exported, the delay output of PWML signals trailing edge is controlled (in reference picture 6 by adjusting circuit U 504
PWML2 waveforms) or/and PWMH rising edge export in advance, that is, reduce the second dead time.
Reference picture 6, switching dead regulation oscillogram of the present invention is illustrated, with reference to above example schematic diagram, wherein PWML
Supplemented by switching tube pulse-width modulation waveform, PWMH is main switch pulse-width modulation waveform, and switching tube opens regulation letter supplemented by PWML1
Number, i.e., the signal that PWML rising edges export in advance；Switching tube turns off Regulate signal supplemented by PWML2, i.e. PWML trailing edges delay is defeated
The signal gone out；Pwm signal supplemented by PWML-next after switching tube M2 regulations, the PWML-next signals are according to PWML1 signals
Obtained with PWML2.Time when PWML-next and PWMH is low level is dead time after regulation.It is of the present invention dead
Area's regulating time, the first dead time can be only adjusted, can also only adjust the second dead time, first can also be adjusted simultaneously
Dead time and the second dead time；When adjusting the first dead time, can only adjust auxiliary switch pipe opens the moment, can also be only
The shut-off moment of main switch is adjusted, can also adjust auxiliary switch simultaneously opens moment and the shut-off moment of main switch；Regulation
Second dead time is similarly.
Although embodiment is separately illustrated and illustrated above, it is related to the common technology in part, in ordinary skill
Personnel apparently, can be replaced and integrate between the embodiments, be related to one of embodiment and the content recorded is not known, then
Refer to another embodiment on the books.
Embodiments described above, the restriction to the technical scheme protection domain is not formed.It is any in above-mentioned implementation
Modifications, equivalent substitutions and improvements made within the spirit and principle of mode etc., should be included in the protection model of the technical scheme
Within enclosing.
Claims (11)
1. a kind of switching power source control circuit, including：
First regulation circuit or/and the second regulation circuit；
The first regulation circuit, will characterize main switch and the first voltage signal of the public terminal voltage of auxiliary switch pipe and the first ginseng
Examine signal to compare, obtain the first comparison signal, whether first comparison signal characterizes adjusts the first dead time, and described first
Dead time is the time for the main switch shut-off moment moment being opened to auxiliary switch pipe；
The second regulation circuit, will characterize main switch and the first voltage signal of the public terminal voltage of auxiliary switch pipe and the second ginseng
Examine signal to compare, obtain the second comparison signal, whether second comparison signal characterizes adjusts the second dead time, and described second
Switching tube shut-off moment to main switch opens the time at moment supplemented by dead time.
2. switching power source control circuit according to claim 1, it is characterised in that：The first regulation circuit includes first
Comparator, the first comparator first end receive the first voltage signal, and the second end receives first reference signal,
In a period of time after the main switch shut-off moment, first voltage signal and the first reference signal are compared with described in output
First comparison signal；If the first comparison signal judges to need to carry out the first dead time regulation, when regulation main switch turns off
Carve or auxiliary switch pipe opens the moment.
3. switching power source control circuit according to claim 2, it is characterised in that：The first regulation circuit also includes the
One impulse generator, first impulse generator receive the pwm signal of main switch, export the first pulse signal, and described the
One pulse signal pulsewidth characterizes a period of time after the main switch shut-off moment.
4. switching power source control circuit according to claim 3, it is characterised in that：The first regulation circuit also includes the
One and door, described first receives first comparison signal and first pulse signal with door, exports the first logical signal.
5. switching power source control circuit according to claim 4, it is characterised in that：The first regulation circuit also includes adjusting
Section auxiliary switch pipe opens first adjustment module at moment or/and main switch shut-off moment, and first adjustment module receives auxiliary
Switching tube pwm signal or/and main switch pwm signal and first logical signal, output adjust the auxiliary of the first dead time
Switching tube opens Regulate signal or/and main switch shut-off Regulate signal.
6. Switching Power Supply according to claim 1 adjusts circuit, it is characterised in that：The second regulation circuit includes second
Comparator, the second comparator first end receive the first voltage signal, and the second end receives second reference signal,
In a period of time after the auxiliary switch pipe shut-off moment, first voltage signal and the second reference signal are compared with described in output
Second comparison signal；If the second comparison signal judges to need to carry out the second dead time regulation, when regulation auxiliary switch pipe turns off
Carve or main switch opens the moment.
7. Switching Power Supply according to claim 6 adjusts circuit, it is characterised in that：The second regulation circuit also includes the
Two impulse generators, second impulse generator receive the pwm signal of auxiliary switch pipe, export the second pulse signal, and described the
Two pulse signal pulsewidths characterize a period of time after the auxiliary switch pipe shut-off moment.
8. Switching Power Supply according to claim 7 adjusts circuit, it is characterised in that：The second regulation circuit also includes the
Two and door, described second receives second comparison signal and second pulse signal with door, exports the second logical signal.
9. Switching Power Supply according to claim 8 adjusts circuit, it is characterised in that：The second regulation circuit also includes adjusting
Section auxiliary switch pipe shut-off moment or/and main switch open second adjustment module at moment, and second adjustment module receives auxiliary
Switching tube pwm signal or/and main switch pwm signal and second logical signal, output adjust the auxiliary of the second dead time
Switching tube opens Regulate signal or/and main switch shut-off Regulate signal.
10. the switching power source control circuit according to claim 5 or 9, it is characterised in that：The on-off circuit also includes patrolling
Circuit is collected, described logic circuit receives the auxiliary switch pipe and opens Regulate signal or/and auxiliary switch pipe shut-off regulation letter
Number or/and main switch shut-off Regulate signal or/and the main switch open Regulate signal, output auxiliary switch pipe
The pwm signal of pwm signal and main switch.
A kind of 11. Switching Power Supply control method：
By the first voltage signal for characterizing main switch and the public terminal voltage of auxiliary switch pipe compared with the first reference signal, the is obtained
One comparison signal, first comparison signal characterize whether adjust the first dead time, and first dead time is main switch
The pipe shut-off moment opens the time at moment to auxiliary switch pipe；The first electricity of main switch and the public terminal voltage of auxiliary switch pipe will be characterized
Signal is pressed compared with the second reference signal, obtains the second comparison signal, it is dead whether the second comparison signal sign adjusts second
Area's time, switching tube shut-off moment to main switch opens the time at moment supplemented by second dead time.
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| CN201711067108.2A CN107834849B (en) | 2017-11-02 | 2017-11-02 | Switching power supply control circuit and control method |
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| CN201711067108.2A CN107834849B (en) | 2017-11-02 | 2017-11-02 | Switching power supply control circuit and control method |
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Cited By (6)
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| CN109039075A (en) * | 2018-09-21 | 2018-12-18 | 杰华特微电子（杭州）有限公司 | A kind of control method of switching circuit, control circuit and switching circuit |
| CN109039076A (en) * | 2018-09-21 | 2018-12-18 | 杰华特微电子（杭州）有限公司 | Control method, control circuit and the switching circuit of switching circuit |
| CN113676055A (en) * | 2021-07-09 | 2021-11-19 | 西安电子科技大学 | Two-way output flyback switching circuit |
| CN113938021A (en) * | 2021-10-08 | 2022-01-14 | 深圳市瀚强科技股份有限公司 | Detection method and circuit for self-adaptively detecting dead zone time length |
| WO2022120788A1 (en) * | 2020-12-11 | 2022-06-16 | 华为技术有限公司 | Switch mode power supply, chip, and device |
| CN117439398A (en) * | 2023-12-20 | 2024-01-23 | 成都市易冲半导体有限公司 | Dead time optimization circuit and method, control circuit thereof and push-pull output circuit |
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| CN113938021B (en) * | 2021-10-08 | 2022-09-13 | 深圳市瀚强科技股份有限公司 | Detection method and circuit for self-adaptively detecting dead zone time length |
| CN117439398A (en) * | 2023-12-20 | 2024-01-23 | 成都市易冲半导体有限公司 | Dead time optimization circuit and method, control circuit thereof and push-pull output circuit |
| CN117439398B (en) * | 2023-12-20 | 2024-03-01 | 成都市易冲半导体有限公司 | Dead time optimization circuit and method, control circuit thereof and push-pull output circuit |
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