CN110504847A - A kind of AC-DC converter based on PFC+LLC topology - Google Patents
A kind of AC-DC converter based on PFC+LLC topology Download PDFInfo
- Publication number
- CN110504847A CN110504847A CN201810483408.7A CN201810483408A CN110504847A CN 110504847 A CN110504847 A CN 110504847A CN 201810483408 A CN201810483408 A CN 201810483408A CN 110504847 A CN110504847 A CN 110504847A
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- circuit
- pfc
- reduction voltage
- topology
- llc
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- 230000009467 reduction Effects 0.000 claims abstract description 29
- 238000006243 chemical reaction Methods 0.000 claims abstract description 19
- 230000001105 regulatory effect Effects 0.000 claims abstract description 9
- 238000001914 filtration Methods 0.000 claims abstract description 8
- 230000005611 electricity Effects 0.000 claims description 7
- 230000004308 accommodation Effects 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 238000013461 design Methods 0.000 description 10
- 230000017525 heat dissipation Effects 0.000 description 9
- 230000008859 change Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
- H01L23/36—Selection of materials, or shaping, to facilitate cooling or heating, e.g. heatsinks
- H01L23/367—Cooling facilitated by shape of device
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
- H01L23/46—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements involving the transfer of heat by flowing fluids
- H01L23/467—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements involving the transfer of heat by flowing fluids by flowing gases, e.g. air
-
- 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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/003—Constructional details, e.g. physical layout, assembly, wiring or busbar connections
-
- 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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0048—Circuits or arrangements for reducing losses
-
- 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
Abstract
The present invention provides a kind of AC-DC converter based on PFC+LLC topology; including conversion circuit, the conversion circuit includes current rectifying and wave filtering circuit, soft start switch, booster circuit, reduction voltage circuit, constant voltage and current limiting circuit, feedback regulating circuit, protection circuit and auxiliary power circuit；The current rectifying and wave filtering circuit, the soft start switch, the booster circuit, the reduction voltage circuit and the constant voltage and current limiting circuit are sequentially connected electrically；The protection circuit is electrically connected with the booster circuit, the reduction voltage circuit and the constant voltage and current limiting circuit respectively；The auxiliary power circuit is electrically connected with the soft start switch, the booster circuit and the reduction voltage circuit respectively；The feedback regulating circuit is connected between the reduction voltage circuit and the constant voltage and current limiting circuit.Switching loss is greatly reduced, whole power is improved.Ensure the promotion of power simultaneously, temperature controls in a certain range.It is designed using PFC, considerably reduces the interference to power grid, improve whole safety.
Description
Technical field
The present invention relates to technical field of automotive electronics, convert more particularly to a kind of AC-DC based on PFC+LLC topology
Device.
Background technique
For automobile AC-DC charger as the important car-mounted device to charge to new energy car battery, the quality of performance is straight
Connect the service life for influencing new energy car battery and vehicle security.With the development of science and technology with various countries for new since 21 century
The quick promotion of energy automobile, the demand of Vehicular charger also increasingly increase, simultaneously for the charging time of Vehicular charger
Shorter and shorter, the power requirement hence for Vehicular charger is also increasing, because while charger power improves, meeting
The loss of charger power device is caused to greatly increase, traditional large power supply uses forward topology, half-bridge and full-bridge substantially
Topology since its magnetic characteristic works in first quartile, and is hard switching operating mode come what is realized, determines that the circuit exists
Some intrinsic defects.And loss of efficiency is relatively serious.
The problem of forward topology, half-bridge and full-bridge topology realize large power supply using hard switching has:
1. within the general 100K of switching frequency that forward topology, half-bridge and full-bridge topology use, for high-power,
The volume of transformer is very big, leads to the loss of power, so that the reduction of effective power, so for the design power of transformer
It is required that improving, the volume of entire charger is also increased；
2. forward topology, half-bridge and full-bridge topology are realized using hard switching, so the switching moments of its power device
Voltage and current stress is very high, causes device temperature relatively high, and switching loss is very big, and the service life also shortens；
3. dv/dt and di/dt compare, larger, EMI and EMI problem is relatively difficult to resolve certainly；
4. the whole cost of product is relatively much higher.
Summary of the invention
In view of the foregoing deficiencies of prior art, the purpose of the present invention is to provide a kind of based on PFC+LLC topology
AC-DC converter for solving in the prior art since its magnetic characteristic works in first quartile, and is hard switching Working mould
It is some intrinsic to determine that the circuit haves the defects that for formula.And the problem that loss of efficiency is relatively serious.
The present invention provides a kind of AC-DC converter based on PFC+LLC topology, including conversion circuit, the conversion circuit
Including current rectifying and wave filtering circuit, soft start switch, booster circuit, reduction voltage circuit, constant voltage and current limiting circuit, feedback regulating circuit, protection
Circuit and auxiliary power circuit；The current rectifying and wave filtering circuit, the soft start switch, the booster circuit, the reduction voltage circuit
It is sequentially connected electrically with the constant voltage and current limiting circuit；The protection circuit respectively with the booster circuit, the reduction voltage circuit and institute
State the electrical connection of constant voltage and current limiting circuit；The auxiliary power circuit respectively with the soft start switch, the booster circuit and described
Reduction voltage circuit electrical connection；The feedback regulating circuit is connected between the reduction voltage circuit and the constant voltage and current limiting circuit.
In one embodiment of the invention, the booster circuit is PFC boost electricity of the prime using BOOST topology formation
Road.
In one embodiment of the invention, the reduction voltage circuit is LLC resonance reduction voltage circuit.
In one embodiment of the invention, the AC-DC converter further includes bottom plate, control panel, power amplifier board and upper cover；Institute
Lid is stated equipped with heat sink；An accommodation space is formed after the bottom plate and upper cover engaging, the conversion circuit setting exists
On the control panel, the control panel is vertically fixed on the power amplifier board；The control panel and the power amplifier board are arranged in institute
It states in accommodation space.
In one embodiment of the invention, mounting hole is offered on the upper lid, radiation air is installed on the mounting hole
Fan.
In one embodiment of the invention, the heat sink is cell structure.
It further include controller and temperature collecting device in one embodiment of the invention, the controller and the temperature
Acquisition device is fixed on the power amplifier board；The controller is connected with the conversion circuit with the radiator fan；The control
Device processed controls the conversion circuit according to the temperature that the temperature collecting device acquires and the radiator fan works.
In one embodiment of the invention, it is all connected on the input terminal, the output end and the temperature collecting device
There is waterproof connector.
In one embodiment of the invention, the control panel and bottom plate interval setting, and spacing distance is greater than
0.254mm。
As described above, a kind of AC-DC converter based on PFC+LLC topology of the invention, has the advantages that
Using LLC Sofe Switch, working frequency is increased substantially, while realizing that the no-voltage of switching device is opened, and is dropped significantly
Low switching loss, improves whole power.
Ensure the promotion of power simultaneously, temperature control changes in a certain range, reduces the power damage of each power device
Consumption, while structure uses maximized heat dissipation design, the heat dissipation of large area adds fan cooling to ensure that converter is stable and reliable in work.
It ensures safety, multi-protective function is devised in circuit design, protect self-security.It is set using PFC
Meter, considerably reduces the interference to power grid, improves whole safety.
Detailed description of the invention
Fig. 1 is shown as the frame structure signal of conversion circuit in the AC-DC converter based on PFC+LLC topology in the present invention
Figure.
Fig. 2 is shown as the configuration schematic diagram of the AC-DC converter based on PFC+LLC topology in the present invention.
Fig. 3 is shown as the bottom view of Fig. 2.
Component label instructions:
1 conversion circuit
2 bottom plates
3 control panels
4 power amplifier boards
5 upper covers
51 radiator fans
52 heat sinks
Specific embodiment
Illustrate embodiments of the present invention below by way of specific specific example, those skilled in the art can be by this specification
Other advantages and efficacy of the present invention can be easily understood for disclosed content.The present invention can also pass through in addition different specific realities
The mode of applying is embodied or practiced, the various details in this specification can also based on different viewpoints and application, without departing from
Various modifications or alterations are carried out under spirit of the invention.It should be noted that in the absence of conflict, following embodiment and implementation
Feature in example can be combined with each other.
It should be noted that illustrating the basic structure that only the invention is illustrated in a schematic way provided in following embodiment
Think, only shown in schema then with related component in the present invention rather than component count, shape and size when according to actual implementation
Draw, when actual implementation kenel, quantity and the ratio of each component can arbitrarily change for one kind, and its assembly layout kenel
It is likely more complexity.
Referring to Fig. 1 to Fig. 3, it should however be clear that this specification structure depicted in this specification institute accompanying drawings, ratio, size etc., only to match
The revealed content of specification is closed, so that those skilled in the art understands and reads, is not intended to limit the invention implementable
Qualifications, therefore do not have technical essential meaning, the modification of any structure, the change of proportionate relationship or the adjustment of size,
In the case where not influencing the effect of present invention can be generated and the purpose that can reach, should all still fall in disclosed technology
In the range of Rong get Neng is covered.Meanwhile it is cited such as "upper", "lower", "left", "right", " centre " and " one " in this specification
Deng term, be merely convenient to being illustrated for narration, rather than to limit the scope of the invention, the change of relativeness
Or adjustment, under the content of no substantial changes in technology, when being also considered as the enforceable scope of the present invention.
As shown in Figure 1 to Figure 3, Fig. 1 is shown as converting electricity in the AC-DC converter based on PFC+LLC topology in the present invention
The frame structure schematic diagram on road (1).Fig. 2 is shown as the detonation configuration of the AC-DC converter based on PFC+LLC topology in the present invention
Schematic diagram.Fig. 3 is shown as the bottom view of Fig. 2.The present invention provides a kind of AC-DC converters based on PFC+LLC topology, including
Conversion circuit 1, the conversion circuit 1 include current rectifying and wave filtering circuit, soft start switch, booster circuit, reduction voltage circuit, constant voltage and current limiting
Circuit, feedback regulating circuit, protection circuit and auxiliary power circuit；It is the current rectifying and wave filtering circuit, the soft start switch, described
Booster circuit, the reduction voltage circuit and the constant voltage and current limiting circuit are sequentially connected electrically；The protection circuit respectively with the boosting
Circuit, the reduction voltage circuit and constant voltage and current limiting circuit electrical connection；The auxiliary power circuit is opened with the soft start respectively
It closes, the booster circuit and the reduction voltage circuit are electrically connected；The feedback regulating circuit be connected to the reduction voltage circuit with it is described
Between constant voltage and current limiting circuit.
In an embodiment of the present invention, the booster circuit is the PFC boost circuit that prime uses BOOST topology formation.
The reduction voltage circuit is LLC resonance reduction voltage circuit.Meanwhile soft start switch uses LLC Sofe Switch, realizes zero electricity of switching device
Pressure is opened, and the power loss of each power device is reduced.Meanwhile booster circuit is designed using PFC, is considerably reduced to power grid
Interference, improve whole safety.Prime uses the PFC boost circuit of BOOST topology formation, behind input commercial power rectification
Dc voltage boost adjusts power factor (PF) to DC400V, can almost ignore to the interference of power grid.Major loop mainly uses
LLC Sofe Switch and LLC reduction voltage circuit, which are constituted, carries out reduction regulation, and the resonant frequency point of LLC is chosen to be 100K.In order to guarantee zero electricity
Sofe Switch operating mode is pressed, is realized using the combination of transformer leakage inductance and resonant inductance to Zero-voltage soft in feedback regulating circuit
The adjusting of switch.12V low-voltage needed for each circuit is entirely to be provided by independent isolated auxiliary power circuit, should
The rated power of auxiliary power circuit design is 15W, and very big limit meets auxiliary power required for whole system.
In an embodiment of the present invention, the AC-DC converter further includes bottom plate 2, control panel 3, power amplifier board 4 and upper cover 5；
The upper cover 5 is equipped with heat sink 52；The bottom plate 2 and the upper cover 5 form an accommodation space, the conversion circuit after engaging
1 is arranged on the control panel 3, and the control panel 3 is vertically fixed on the power amplifier board 4；The control panel 3 and the power
Plate 4 is arranged in the accommodation space.Further, mounting hole is offered in the upper cover 5, is equipped on the mounting hole scattered
Hot-air fan 51.Meanwhile the heat sink 52 is cell structure.Structure uses maximized heat dissipation design, and the heat dissipation of large area adds
Fan cooling ensures that converter is stable and reliable in work.
It in a preferred embodiment, further include controller and temperature collecting device, the controller and the temperature acquisition
Device is fixed on the power amplifier board 4；The controller is connected with the conversion circuit 1 with the radiator fan 51；The control
Device processed controls the conversion circuit 1 according to the temperature that the temperature collecting device acquires and the radiator fan 51 works.Into one
Step, waterproof connector is respectively connected on the input terminal, the output end and the temperature collecting device.Preferably, described
Control panel 3 and the setting of the interval of the bottom plate 2, and spacing distance is greater than 0.254mm.To guarantee heat dissipation effect.
AC-DC converter design rated output power be Shang kilowatt, be for the partial switch device electric current to be passed through
It is bigger, so also having stringenter design for fan heat problem, it is contemplated that the problem of heat dissipation and volume, power device design
On the aluminum substrate with preferable heat-sinking capability, aluminum substrate touch shell, control device PCB on aluminum substrate, it is high-power walk
For line by carrying out upper and lower level grafting with a thickness of 1.5mm, the copper post that diameter is 12, the additional fan Hot-air fan of shell takes into account consideration heat dissipation
Problem, and improve whole stability.
In conclusion the AC-DC converter of the invention based on PFC+LLC topology, using LLC Sofe Switch, working frequency
It increases substantially, while realizing that the no-voltage of switching device is opened, greatly reduce switching loss, improve whole power.
Ensure the promotion of power simultaneously, temperature control changes in a certain range, reduces the power loss of each power device, ties simultaneously
Structure uses maximized heat dissipation design, and the heat dissipation of large area adds fan cooling to ensure that converter is stable and reliable in work.Ensure peace
Quan Xing devises multi-protective function in circuit design, protects self-security.It is designed, is considerably reduced pair using PFC
The interference of power grid improves whole safety.So the present invention effectively overcomes various shortcoming in the prior art and has height
Value of industrial utilization.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe
The personage for knowing this technology all without departing from the spirit and scope of the present invention, carries out modifications and changes to above-described embodiment.Cause
This, institute is complete without departing from the spirit and technical ideas disclosed in the present invention by those of ordinary skill in the art such as
At all equivalent modifications or change, should be covered by the claims of the present invention.
Claims (9)
1. a kind of AC-DC converter based on PFC+LLC topology, which is characterized in that including conversion circuit (1), the conversion electricity
Road (1) include current rectifying and wave filtering circuit, soft start switch, booster circuit, reduction voltage circuit, constant voltage and current limiting circuit, feedback regulating circuit,
Protect circuit and auxiliary power circuit；
The current rectifying and wave filtering circuit, the soft start switch, the booster circuit, the reduction voltage circuit and constant voltage and current limiting electricity
Road is sequentially connected electrically；
The protection circuit is electrically connected with the booster circuit, the reduction voltage circuit and the constant voltage and current limiting circuit respectively；
The auxiliary power circuit is electrically connected with the soft start switch, the booster circuit and the reduction voltage circuit respectively；
The feedback regulating circuit is connected between the reduction voltage circuit and the constant voltage and current limiting circuit.
2. the AC-DC converter according to claim 1 based on PFC+LLC topology, which is characterized in that the booster circuit
The PFC boost circuit of BOOST topology formation is used for prime.
3. the AC-DC converter according to claim 1 based on PFC+LLC topology, which is characterized in that the reduction voltage circuit
For LLC resonance reduction voltage circuit.
4. the AC-DC converter according to claim 1 based on PFC+LLC topology, which is characterized in that the AC-DC turns
Parallel operation further includes bottom plate (2), control panel (3), power amplifier board (4) and upper cover (5)；The upper cover (5) is equipped with heat sink (52)；
An accommodation space is formed after the bottom plate (2) and the upper cover (5) engaging, the conversion circuit (1) is arranged in the control
In making sheet (3), the control panel (3) is vertically fixed on the power amplifier board (4)；The control panel (3) and the power amplifier board (4)
It is arranged in the accommodation space.
5. the AC-DC converter according to claim 1 based on PFC+LLC topology, which is characterized in that the upper cover (5)
On offer mounting hole, radiator fan (51) are installed on the mounting hole.
6. the AC-DC converter according to claim 5 based on PFC+LLC topology, which is characterized in that the heat sink
It (52) is cell structure.
7. the AC-DC converter according to claim 5 based on PFC+LLC topology, which is characterized in that further include controller
And temperature collecting device,
The controller and the temperature collecting device are fixed on the power amplifier board (4)；The controller and conversion electricity
Road (1) is connected with the radiator fan (51)；The controller is according to the temperature control that the temperature collecting device acquires
Conversion circuit (1) and the radiator fan (51) work.
8. the AC-DC converter according to claim 1 based on PFC+LLC topology, which is characterized in that the input terminal,
Waterproof connector is respectively connected on the output end and the temperature collecting device.
9. the AC-DC converter according to claim 1 based on PFC+LLC topology, which is characterized in that the control panel
(3) it is arranged with the bottom plate (2) interval, and spacing distance is greater than 0.254mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810483408.7A CN110504847A (en) | 2018-05-18 | 2018-05-18 | A kind of AC-DC converter based on PFC+LLC topology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810483408.7A CN110504847A (en) | 2018-05-18 | 2018-05-18 | A kind of AC-DC converter based on PFC+LLC topology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110504847A true CN110504847A (en) | 2019-11-26 |
Family
ID=68584114
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810483408.7A Pending CN110504847A (en) | 2018-05-18 | 2018-05-18 | A kind of AC-DC converter based on PFC+LLC topology |
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| Country | Link |
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| CN (1) | CN110504847A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11411504B1 (en) | 2021-05-07 | 2022-08-09 | Chicony Power Technology Co., Ltd. | Voltage transforming device |
| US11817788B1 (en) | 2022-06-09 | 2023-11-14 | Chicony Power Technology Co., Ltd. | Voltage converter and control method for voltage conversion |
| US11901820B2 (en) | 2021-05-07 | 2024-02-13 | Chicony Power Technology Co., Ltd. | Power supply apparatus with step-up and step-down conversion |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN203039971U (en) * | 2012-12-26 | 2013-07-03 | 王向杰 | Novel lamp drive circuit |
| CN103855779A (en) * | 2012-12-04 | 2014-06-11 | 洛阳嘉盛电源科技有限公司 | Intelligent charger |
| CN104467388A (en) * | 2014-12-05 | 2015-03-25 | 中国船舶重工集团公司第七0九研究所 | Conductive harmonic suppression power supply based on PFC |
| US20160329825A1 (en) * | 2014-09-30 | 2016-11-10 | Guangdong Bestek E-Commerce Co., Ltd. | Smart matching step-down circuits and travel-use power conversion devices |
| CN107370404A (en) * | 2017-08-09 | 2017-11-21 | 航天长峰朝阳电源有限公司 | Integrated PFC high voltage half-bridge resonance synchronous rectification AC/DC power modules |
-
2018
- 2018-05-18 CN CN201810483408.7A patent/CN110504847A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103855779A (en) * | 2012-12-04 | 2014-06-11 | 洛阳嘉盛电源科技有限公司 | Intelligent charger |
| CN203039971U (en) * | 2012-12-26 | 2013-07-03 | 王向杰 | Novel lamp drive circuit |
| US20160329825A1 (en) * | 2014-09-30 | 2016-11-10 | Guangdong Bestek E-Commerce Co., Ltd. | Smart matching step-down circuits and travel-use power conversion devices |
| CN104467388A (en) * | 2014-12-05 | 2015-03-25 | 中国船舶重工集团公司第七0九研究所 | Conductive harmonic suppression power supply based on PFC |
| CN107370404A (en) * | 2017-08-09 | 2017-11-21 | 航天长峰朝阳电源有限公司 | Integrated PFC high voltage half-bridge resonance synchronous rectification AC/DC power modules |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11411504B1 (en) | 2021-05-07 | 2022-08-09 | Chicony Power Technology Co., Ltd. | Voltage transforming device |
| US11901820B2 (en) | 2021-05-07 | 2024-02-13 | Chicony Power Technology Co., Ltd. | Power supply apparatus with step-up and step-down conversion |
| US11817788B1 (en) | 2022-06-09 | 2023-11-14 | Chicony Power Technology Co., Ltd. | Voltage converter and control method for voltage conversion |
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