CN101753014A - Phase-shifting control method of a boost converter and implementing circuit - Google Patents
Phase-shifting control method of a boost converter and implementing circuit Download PDFInfo
- Publication number
- CN101753014A CN101753014A CN200810185166A CN200810185166A CN101753014A CN 101753014 A CN101753014 A CN 101753014A CN 200810185166 A CN200810185166 A CN 200810185166A CN 200810185166 A CN200810185166 A CN 200810185166A CN 101753014 A CN101753014 A CN 101753014A
- Authority
- CN
- China
- Prior art keywords
- subloop
- distance
- charging
- current
- major loop
- 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
Images
Landscapes
- Dc-Dc Converters (AREA)
Abstract
The present invention relates to a phase-shifting control method of a boost converter and an implementing circuit, wherein the boost converter is provided with a main energy storing loop and at least one second energy storing loop connected with the main energy storing loop in parallel; a main loop current passing through the main energy storing loop has main loop charging time distance and main loop discharging time distance; and a second loop current passing through the second energy storing loop has second loop charging time distance and second loop discharging time distance. An ideal switching time sequence of judging value when the second loop current decreases to zero current is calculated, an actual switching time sequence of the second loop charging time distance is started, break-over error time distance of the phase differences of the ideal switching time sequence and the actual switching time sequence is obtained, and the second loop charging time distance is decided by the break-over error time distance and the main loop charging time sequence. Thus, the break-over error time distance of the nest period is avoided to enlarge, and further, a problem that the second loop current generates subharmonic oscillation is avoided.
Description
Technical field
The present invention relates to a kind of phase shift control method of boosting type converter and implement circuit, particularly drive parallel boosting type converter guarantees that it is worked under critical conduction mode control method.
Background technology
Most now power supply unit or power adapter (adapter) all provide the function of adjusting voltage by the transducer (converter) of suitching type, and modal be boosting type converter (Boost converter), its purposes more is found in the power factor correction circuit except adjusting voltage, by the power factor of the modulation input electric power that boosts; See also Fig. 1, Figure 1 shows that the circuit basic framework of parallel boost converter, after connecting that input 101 is obtained input electric power and it is tuned as direct current by rectification unit 1, be tuned as modulation electric power by this boosting type converter 2 and export power conversion unit 3 to, and by this power conversion unit 3 output power that is this power supply unit or power adapter with this modulation power conversions; And above-mentioned boosting type converter 2 comprises main tank circuit and secondary tank circuit for parallel transducer, wherein this main tank circuit comprises main energy storage coil 21 series diodes 26, and be connected the first controlled switch element 23 between this main energy storage coil 21 and this diode 26, this pair tank circuit comprises secondary energy storage coil 22 series diodes 27, and should pair energy storage coil 22 with this diode 27 between be connected controlled second switch unit 24; Wherein this boosting type converter 2 also comprises control unit 25 and produces first drive signal driving this first switch element 23 and second drive signal driving this second switch unit 24, according to the conducting of this first switch element 24 or by the main circuit current (I of this main energy storage coil 21 of will flowing through
Master) when dividing into the major loop charging that electric current rises apart from and electric current descend the major loop discharge time distance, same, the subloop electric current (I of this pair energy storage coil 22 also will flow through in this second switch unit 24
Slave) when dividing into the subloop charging that electric current rises apart from and electric current descend the subloop discharge time distance, and this control unit 25 makes this first drive signal and this second drive signal have different output timing, the type of drive that just makes the conducting sequential of this first, second switch element 23,24 stagger.
And above-mentioned type of drive is called the control of alternating expression (interleave), therefore often be called crisscross parallel formula boost converter, and this type of drive is divided into two kinds: method is turn-offed in phase shift conducting method and phase shift; Wherein the current waveform that forms of phase shift conducting method and control pulse wave sequential as shown in Figure 2, the first half of Fig. 2 illustrates the main circuit current (I of this main energy storage coil 21 of flowing through
Master) and the subloop electric current (I of this pair energy storage coil 22 of flowing through
Slave), this main circuit current (I
Master) and this subloop electric current (I
Slave) direction has been shown among Fig. 1, Fig. 2 Lower Half is then represented should main circuit current and first drive signal and this second drive signal of this subloop electric current, before the research current waveform, we must make following definition, height when a drive signal, that time point of low level conversion is defined as " sequential ", the definition of sequential help we understand this first, second switch unit 23,24 conducting or deadline point, and this first, second switch unit 23,24 conductings or the duration length of ending are called " time apart from ", the time distance definition can help us to analyze the time span of certain state continuance; Wherein the characteristics of phase shift conducting method are that this first drive signal exports when detecting these main energy storage coil 21 zero currents, during through fixing charging apart from (T
ON) after end, the conducting sequential of this second drive signal and the conducting sequential of this first drive signal have the time difference, when supposing the charging of this first drive signal apart from long T altogether
S, the conducting sequential of second drive signal is then set with this first drive signal and is differed T in the next cycle
S/ 2, as long as after this first drive signal is exported in following one-period, this control unit 25 fixed intervals T
SThen export this second drive signal after/2 time; To have a regular time poor and the shortcoming of phase shift conducting method also is the conducting sequential that comes from this first, second drive signal, because the output timing of this second drive signal is to add that according to the sequential that this first drive signal produces regular time is poor, but not judge the electric current of this pair energy storage coil, should may still have electric current or electric current to stop already by pair energy storage coil 22 when therefore this second drive signal is exported, make this pair energy storage coil 22 work in continuous current pattern or discontinuous current pattern, but not our desired critical conduction mode.
And the electric current and the drive signal waveform of phase shift shutoff method are found in Fig. 3, and the first half of Fig. 3 illustrates the main circuit current (I of this main energy storage coil 21 of flowing through
Master) and the subloop electric current (I of this pair energy storage coil 22 of flowing through
Slave), Fig. 3 Lower Half is then represented should main circuit current and first drive signal and this second drive signal of this subloop electric current, the output timing of this first drive signal is identical with phase shift conducting method, but 25 of this control units are judged the sequential of the zero current time point of this pair energy storage coil 22 as this second drive signal of output, and this second drive signal is by sequential adding the time difference and obtain by sequential according to this first drive signal then; Though turn-offing method, phase shift can guarantee that this transducer works in critical condition, the conducting sequential of secondary tank circuit is to drop to zero current and determine according to this subloop electric current of detecting, be not directly controlled, when this transducer establishes that load makes main circuit current fluctuation or the change of input electric power and when causing electric power to float connecing, the reality of this pair tank circuit by sequential then and ideal when having the conducting error between the sequential apart from Δ T (as shown in Figure 4), to cause in the electric current of boosting type converter 2 outputs, having produced the phenomenon of subharmonic oscillation like this, can produce the phenomenon of subharmonic oscillation less than 0.5 the time through the checking of theoretical derivation and experimental data as the empty accounting D of these 24 work periods of second switch unit (Duty ratio), and visible this subloop electric current will produce suddenly big or suddenly small fluctuation in Fig. 4, to cause the subloop electric current out-of-sequence fully when serious, make that this converter efficiency is low maybe can't to be operated.
Because phase shift conducting method is difficult to control it and is operated in critical conduction mode, so the shortcoming of phase shift shutoff method generation subharmonic oscillation must be improved to improve the efficient of parallel boost converter work.
Summary of the invention
Because this phase shift shutoff method is applied to crisscross parallel formula boost converter and has the disappearance of above-mentioned subharmonic oscillation, to not produce subloop electric power phenomenon out of control if do not improve, thereby the purpose of this case promptly is to provide a kind of control method to drive crisscross parallel formula boost converter, make beyond this main tank circuit normal operation, also control the out-of-control phenomenon that sequential that this pair tank circuit revised its work is produced apart from Δ T when reducing the conducting error.
The invention provides a kind of phase shift control method of boosting type converter and implement circuit, wherein this boosting type converter has main tank circuit and at least one secondary tank circuit that is parallel to this main tank circuit, and when the main circuit current by this main tank circuit has the major loop charging apart from and distance during the major loop discharge, when the subloop electric current by this pair tank circuit has the subloop charging apart from and distance during the subloop discharge, this phase shift control method comprises: A, judge that this main circuit current arrival zero current judgment value opened when the beginning, this major loop charged apart from making this main circuit current rise when following; B, distance when opening beginning this major loop discharge after finishing when the charging of this major loop form complete cycle in judging that this main circuit current descends when arriving this zero current judgment value, and distance when opening the major loop charging of following one-period of beginning; C, calculate this subloop electric current according to the peak value in this last cycle of subloop electric current and descend and arrive the desirable switching sequence of this zero current judgment value, and judge that this subloop electric current arrives this zero current judgment value, and obtain the actual switching sequence of distance when opening beginning this subloop charging, and distance when obtaining the conducting error that this ideal switching sequence and this actual switching sequence differ; D, during by this conducting error apart from this major loop charging the time function of distance and distance when determining in this cycle this subloop charging; By above-mentioned method when obtaining this conducting error apart from distance when calculating this subloop charging, can change the sequential of distance when switching to the subloop discharge like this, apart from expansion, further avoid this subloop electric current to produce the problem of subharmonic oscillation when avoiding the conducting error of following one-period thus.
In sum, the good effect that this case provided is to prevent that above-mentioned parallel boost converter from producing the phenomenon of subharmonic oscillation in operation.
Description of drawings
Fig. 1 is the circuit structure diagram of existing parallel transducer transition that boosts.
Fig. 2 is the current waveform schematic diagram by existing phase shift conducting method control.
Fig. 3 is the current waveform schematic diagram by existing phase shift shutoff method control.
Fig. 4 turn-offs the current waveform schematic diagram that method forms subharmonic oscillation for existing phase shift.
Fig. 5 is for implementing the circuit structure diagram of this case control method.
Fig. 6 is the current modulating schematic diagram of this case control method.
Fig. 7 is the schematic diagram that concerns of error constant in this case control method and current modulating.
Embodiment
This case is a kind of phase shift control method of boosting type converter and implements circuit, be applied in the power supply unit crisscross parallel formula boosting type converter (being designated hereinafter simply as boosting type converter 2) as shown in Figure 5, this power supply unit connects input 101, rectification unit 1 is obtained input electric power and rectification and is exported boosting type converter 2 to being connected this input 101, and is tuned as specified output power and delivers to output 102 via delivering to this power conversion unit 3 behind these boosting type converter 2 modulations; Wherein this boosting type converter 2 has main tank circuit and at least one secondary tank circuit that is parallel to this main tank circuit, this main tank circuit and secondary tank circuit comprise energy storage coil 21 respectively, 22 and with this energy storage coil 21,22 diode in series 26,27, and this main tank circuit connects first switch element 23 between this energy storage coil 21 and this diode 26, this pair tank circuit connects second switch unit 24 between this energy storage coil 22 and this diode 27, and the conducting of this first switch element 23 and the main circuit current (I that passes through this main tank circuit by order
Master) have major loop when charging apart from and distance during the major loop discharge, these second switch unit 24 orders are by the subloop electric current (I of this pair tank circuit
Slave) have subloop when charging apart from and distance during the subloop discharge; And the control method that this case provided comprises: A, judge when this main circuit current arrives zero current judgment value and opens beginning this major loop charging when following apart from making this main circuit current rising; B, distance when opening beginning this major loop discharge after finishing when the charging of this major loop form complete cycle in judging that this main circuit current descends when arriving this zero current judgment value, and distance when opening the major loop charging of following one-period of beginning; C, calculate this subloop electric current according to the peak value in this last cycle of subloop electric current and descend and arrive the desirable switching sequence of this zero current judgment value, and judge that this subloop electric current arrives this zero current judgment value, and obtain the actual switching sequence of distance when opening beginning this subloop charging, and distance (Δ T when obtaining the conducting error that this ideal switching sequence and this actual switching sequence differ
On); D, during by this conducting error apart from (Δ T
On) function of distance and the time span of distance when determining this subloop charging in this cycle during with the charging of this major loop; In the said method, during the charging of this subloop apart from being during apart from (Δ T by this conducting error
On) when multiply by error constant and adding the charging of this major loop apart from and determine, and during this major loop charging apart from being regular time length; For implementing above-mentioned control method, this boosting type converter also comprises the control unit 25 that produces this first switch element 23 of first drive, and the correction and the driver element 28 that produce this second switch unit 24 of second drive, by this control unit 25 and this correction and driver element 28 control respectively this first, second switch unit 23,24, wherein this control unit 25 is set this zero current judgment value and the comparison of this main circuit current, and whether arrive this zero current judgment value and this first drive signal of modulation distance when whether opening beginning this major loop charging with decision according to this main circuit current, it is right that this is proofreaied and correct with driver element 28 these zero current judgment value of setting and this subloop current ratio, and whether arrive this zero current judgment value and this second drive signal of modulation distance when whether opening beginning this subloop charging with decision according to this subloop electric current, wherein this correction and driver element 28 electrically connect this control unit 25 and obtain this first drive signal, the speed of distance and the discharge of this main circuit current when charging to obtain this major loop, and this correction and driver element 28 judge that according to the speed of this main circuit current discharge this subloop electric current decline arrives the desirable switching sequence of this zero current judgment value, can make the actual switching sequence of this correction and driver element 28 distance according to this ideal switching sequence and when opening beginning this subloop charging like this, and then distance (Δ T when obtaining the conducting error that this ideal switching sequence and this actual switching sequence differ
On), distance (Δ T when further utilizing this conducting error
On) during with the charging of this major loop apart from and the time span of distance when determining this subloop charging in this cycle.
Above-mentioned control method can be come and should demonstrate,prove with the mathematical notation formula, the derivation of mathematical expression and corresponding oscillogram see also Fig. 6, comprise the ideal waveform 91 of subloop electric current, not correction signal 92 and correction signal 93 among Fig. 6, wherein this ideal waveform 91 is the perfect condition of no any current fluctuation in the hypothesis circuit, therefore sequential that should pair tank circuit charge and discharge does not have error, and this is 92 of correction signals distance (Δ T when having the conducting error not
On) waveform since this subloop when charging of correction signal 92 apart from not through overcorrect, make this not correction signal 92 compare with ideal waveform 91 when also having cut-off error apart from (Δ T
Off); Wherein we try to achieve the rate of rise of this subloop electric current earlier (with S
rThe representative) and descending slope (with S
fRepresentative):
S
r＝U
in/L ....(1)
S
f＝(U
in-U
o)/L ....(2)
U wherein
InThe current peak of this subloop electric current is flow through in expression;
U
oThe minimum of vice loop current;
L represents the time span in this cycle;
If our desire during with the conducting error of following one-period apart from (Δ T
On') dwindle then order:
|ΔT
on’/ΔT
on|＝U
in/(U
o-U
in)＜1....(3)
Then (1) formula can obtain with (2) formula substitution (3) formula
U
in＜0.5U
o....(4)
(4) U is worked as in the formula representative
InLess than 0.5U
oThe time during conducting error apart from (Δ T
On) restrain, can avoid taking place the subharmonic concussion, but U
InGreater than 0.5U
oThe subharmonic concussion generally takes place in Shi Zeru Fig. 4; But with the control method of this case during with this conducting error apart from (Δ T
On) function of distance and distance when determining this subloop charging during with the charging of this major loop, available following mathematical expression is verified:
T
on_slave＝ΔT
on+T
on_master?....(5)
Wherein:
(5) T that formula produced
On_slaveRepresent this subloop when charging distance of correction signal 92;
(5) T in the formula
On_masterRepresent this major loop when charging distance of correction signal 92;
Δ T
OnDistance during for this conducting error;
With (3) formula substitution (5) Shi Kede:
|ΔT
on’|＝|ΔT
on|·U
in/(U
o-U
in)....(6)
If allow Δ T
On'=0 item must be with T
On_slaveBe controlled to be following formula:
T
on_slave＝T
on_master+ΔT
on-ΔT
off
＝D·ΔT
on+T
on_master ....(7)
D=T wherein
On/ T
On+ T
Off
And (7) formula can further derive in this cycle this subloop charging according to (4) formula the time time span of distance can be expressed as:
T
on_slave＝k·ΔT
on+T
on_master....(8)
T wherein
On_slaveDistance when charging for subloop;
K is an error constant;
T
On_masterDistance when charging for major loop;
The relation of distance saw also Fig. 7 and table one when wherein error constant k and subloop charged:
Table one
Wherein comprised ideal waveform 91 among Fig. 7, and k in the correspondence table one
1 Correction signal 921, correspondence table one in k
2Correction signal 922, correspondence table one in k
3Correction signal 923, correspondence table one in k
4Correction signal 924 and correspondence table one in k
5Correction signal 925; Contrast Fig. 7 and table one as can be known, when 0＜k＜2D, | Δ T
On'/Δ T
On|＜1, promptly control 0＜k＜2D and can make Δ T
OnConvergence, when making the conducting error of following one-period apart from dwindling, this case can use PI or PID controller (proportional-integralcontroller or proportional-integral-derivative controller) implement this correction and driver element 28 when controlling this conducting error apart from Δ T
OnConvergence, make when this subloop electric current is subjected to influence of fluctuations, avoid uncontrollable subharmonic oscillation during the conducting error of following one-period apart from dwindling, wherein, above-mentioned PI and PID controller are to have in the field of electric control to know the knowledgeable institute well known usually, do not repeat them here the technical characterictic of its operation principles with this case of avoiding confusion.
Distance was adjusted when distance and this major loop charged when the length of distance was according to this error in the time of can making this subloop charging by above-mentioned control method, and distance is a regular time length during this major loop charging, apart from being to make corresponding modulation mainly, cause electric current out of control when therefore this subloop charges to avoid this conducting error sequential constantly to enlarge according to this conducting error sequential.
The above is the preferred embodiments of the present invention only, is not limited to the present invention.In the above-described embodiments, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. the phase shift control method of a boosting type converter, wherein said boosting type converter (2) has main tank circuit and at least one secondary tank circuit that is parallel to described main tank circuit, and when the main circuit current by described main tank circuit has the major loop charging apart from and distance during the major loop discharge, when the subloop electric current by described secondary tank circuit has the subloop charging apart from and distance during the subloop discharge, it is characterized in that described phase shift control method comprises:
A, the described main circuit current arrival of judgement zero current judgment value opened when following when the beginning, described major loop charged apart from making described main circuit current rising;
B, distance when opening beginning described major loop discharge after finishing when the charging of described major loop form complete cycle in judging that described main circuit current descends when arriving described zero current judgment value, and distance when opening the major loop charging of following one-period of beginning;
C, calculate described subloop electric current according to the peak value in described last cycle of subloop electric current and descend and arrive the desirable switching sequence of described zero current judgment value, and judge that described subloop electric current arrives described zero current judgment value, and obtain the actual switching sequence of distance when opening beginning described subloop charging, and distance when obtaining the conducting error that described desirable switching sequence and described actual switching sequence differ;
D, during by described conducting error apart from described major loop charging the time function of distance and distance when determining the charging of subloop described in the described cycle.
2. the phase shift control method of boosting type converter according to claim 1 is characterized in that, during the charging of described subloop apart from be during by described conducting error when multiply by error constant and add described major loop charging apart from and determine.
3. the phase shift control method of boosting type converter according to claim 1 is characterized in that, distance was a regular time length when described major loop charged.
4. the phase shift control method of boosting type converter according to claim 1, it is characterized in that, the circuit of implementing described method comprises first switch element (23) that connects described main tank circuit, the second switch unit (24) that connects described secondary tank circuit, the correction and the driver element (28) that produce the control unit (25) of described first switch element of first drive (23) and produce the described second switch of second drive unit (24), wherein said control unit (25) is set described zero current judgment value and the comparison of described main circuit current, and whether arrive described zero current judgment value and described first drive signal of modulation distance when whether opening beginning described major loop charging with decision according to described main circuit current, it is right with described subloop current ratio that described correction and driver element (28) are set described zero current judgment value, and whether arrive described zero current judgment value and described second drive signal of modulation distance when whether opening with decision that the beginning, described subloop charged according to described subloop electric current.
5. the phase shift control method of boosting type converter according to claim 4, it is characterized in that described correction and driver element (28) judge that according to the speed of described main circuit current discharge described subloop electric current decline arrives the desirable switching sequence of described zero current judgment value.
6. the phase shift control method of boosting type converter according to claim 5, it is characterized in that, described correction and driver element (28) electrically connect described control unit (25) and obtain described first drive signal, the speed of distance and the discharge of described main circuit current when charging to obtain described major loop.
7. the phase shift control method of boosting type converter according to claim 4, it is characterized in that, described main tank circuit and secondary tank circuit comprise respectively energy storage coil (21,22) and with described energy storage coil (21,22) diode in series (26,27), wherein said first, second switch element (23,24) then is connected between the energy storage coil (21,22) and diode (26,27) of described main tank circuit and secondary tank circuit.
8. the phase shift control method of boosting type converter according to claim 1 is characterized in that, the function of distance can be expressed as T when determining the charging of subloop described in the described cycle
On_slave=k Δ T
On+ T
On_master,
T wherein
On_slaveDistance when charging for subloop, k is an error constant, T
On_masterDistance when charging for major loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810185166XA CN101753014B (en) | 2008-12-11 | 2008-12-11 | Phase-shifting control method of a boost converter and implementing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810185166XA CN101753014B (en) | 2008-12-11 | 2008-12-11 | Phase-shifting control method of a boost converter and implementing circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101753014A true CN101753014A (en) | 2010-06-23 |
| CN101753014B CN101753014B (en) | 2012-01-11 |
Family
ID=42479531
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810185166XA Active CN101753014B (en) | 2008-12-11 | 2008-12-11 | Phase-shifting control method of a boost converter and implementing circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101753014B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103151927A (en) * | 2011-11-11 | 2013-06-12 | 海德堡印刷机械股份公司 | High-power DC voltage converter |
| TWI487284B (en) * | 2011-07-28 | 2015-06-01 | Power Integrations Inc | Varying switching frequency and period of a power supply controller |
| US20230006551A1 (en) * | 2021-06-30 | 2023-01-05 | Nxp Usa, Inc. | Phase control of interleaved boost converter using cycle ring time |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11870349B2 (en) | 2021-08-25 | 2024-01-09 | Nxp Usa, Inc. | Input voltage ripple compensation of interleaved boost converter using cycle times |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| MX9504237A (en) * | 1994-02-10 | 1997-04-30 | Philips Electronics Nv | High frequency ac/ac converter with power factor correction. |
-
2008
- 2008-12-11 CN CN200810185166XA patent/CN101753014B/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI487284B (en) * | 2011-07-28 | 2015-06-01 | Power Integrations Inc | Varying switching frequency and period of a power supply controller |
| CN103151927A (en) * | 2011-11-11 | 2013-06-12 | 海德堡印刷机械股份公司 | High-power DC voltage converter |
| US20230006551A1 (en) * | 2021-06-30 | 2023-01-05 | Nxp Usa, Inc. | Phase control of interleaved boost converter using cycle ring time |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101753014B (en) | 2012-01-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102291871B (en) | Dimming control for a switching power supply | |
| CN100356655C (en) | Circuit for controlling battery charging, battery charging device and control method | |
| CN107248817A (en) | Quasi-resonance control switching circuit and method | |
| CN101813956B (en) | Advanced phase number control for multiphase converters | |
| US8072193B2 (en) | Phase shift control method for boost converter and circuit implementation | |
| WO2016125374A1 (en) | Dc/dc converter | |
| CN102055358A (en) | Power converter, charging method and charging system | |
| CN101753014B (en) | Phase-shifting control method of a boost converter and implementing circuit | |
| CN102136801A (en) | Resonant converter and intermittent mode control method thereof | |
| CN105322766A (en) | Constant ON-time or constant OFF-time switching power converter and control circuit thereof | |
| CN101702574A (en) | Power factor correcting controller and control method and applied power supply converter thereof | |
| CN103038969A (en) | Reactive power management | |
| CN103840667A (en) | Method and apparatus for on/off control of a power converter | |
| CN100420135C (en) | Push-pull converter and method for power supply device and uninterrupted power supply system | |
| CN101677213A (en) | Digital peak input voltage detector for a power converter controller | |
| CN107959421A (en) | BUCK-BOOST types direct current transducer and its control method | |
| CN104201887A (en) | Zero crossing regulating circuit and zero crossing regulating method of buck converter | |
| CN108199424A (en) | Multi-phase charging circuit and control method thereof | |
| CN103560783A (en) | Digital event generator, comparator, switched mode energy converter and method | |
| CN104024967B (en) | Power supply device and power supply changing method | |
| CN104756343A (en) | Power transmission system | |
| CN102372201A (en) | Elevator energy storage device | |
| CN102858071A (en) | High-power-factor direct-current current output light-emitting diode (LED) driving circuit with low-energy-storage capacitor | |
| CN103856053B (en) | There is the power-supply controller of electric of overpower protection | |
| WO2016172684A1 (en) | Method and apparatus for controlled voltage levels for one or more outputs |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |