CN101022245A - Improved flyback type electric source supply device - Google Patents
Improved flyback type electric source supply device Download PDFInfo
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- CN101022245A CN101022245A CN 200610007378 CN200610007378A CN101022245A CN 101022245 A CN101022245 A CN 101022245A CN 200610007378 CN200610007378 CN 200610007378 CN 200610007378 A CN200610007378 A CN 200610007378A CN 101022245 A CN101022245 A CN 101022245A
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Abstract
This invention discloses a reformed run-back supply device including a controller, a switch element controlled by the controller and switches in a conduction perion and a non-conduction period, a first conversion circuit and a second conversion circuit, in which, the first one includes a first transformer controlled by the switch element to turn on or off the current and outputs a first current in one of the two periods, the second conversion circuit includes a second transformer controlled by the switch element to turn on or off the current, the primary side of which is serial to the that of the first transformer, the secondary side of the second one is parallel to that of the first transformer and connected to an output end, and the second transformer outputs a second current in the other of the two periods, thus the output end outputs first and second currents alternately in the two periods.
Description
Technical field
The invention relates to a kind of power supply changeover device, particularly relate to a kind of improved flyback type (Fly Back) power supply device of supplying the output of big electric current and meeting the high power requirement, the volume production of power supply unit (PowerSupply) that is particularly suitable for LCD TV (LCD TV), plasma-screen television (PDP TV) and the LCD screen (LCD MONITOR) of big screen is used.
Background technology
At present as the power supply device of ac/dc (AC to DC) conversion, mainly divide into two kinds of technology of linear formula and switch power supply apparatus, linear formula power supply device is to use strong current transformer, big and the Heavy Weight of volume, can't be directly installed on the circuit board, and conversion efficiency is low, so efficient height is provided in development, the switching power supply technology of advantages such as power consumption is little and in light weight, common switching power supply device have the push-pull type (Push Pull) of high power output (about 400 watts), in the flyback types such as (Fly back) of low power output (several watts～150 watts).
Consulting Fig. 1, is example with existing flyback type electric source supply device 9, and it has an input stage (Input stage) circuit 91, a merit because of adjusting (Power Factor Corrector; P.F.C.) circuit 92, a flyback change-over circuit 93 and a feedback circuit (Feedback Circuit) 94.
The input stage circuit 91 that flyback type electric source supply device 9 has is made of elements such as filter, bridge rectifier (figure does not show); Merit is in order to reduce the harmonic wave generation and to adjust power factor (PF) (Power factor) to improve the service efficiency of electric power because of adjusting circuit 92; Feedback circuit 94 is output voltage to be coupled to flyback change-over circuit 93 make comparisons to obtain more accurate direct current output.
Consult Fig. 1 and Fig. 2, the flyback change-over circuit 93 of flyback type electric source supply device 9 has a protective circuit 930, a power switch component 931, a transformer 932, a rectifier diode 933, a filter element 934 and the wide adjustment of a ripple (Pulse Width Modulation; PWM) controller 935.
The wide adjustment controller 935 of ripple is to export a pulse wave signal power controlling switch element 931 (as: MOSFET) according to the feedback signal of feedback circuit 94 to switch in a conducting phase and a non-conduction phase, and to adjust the mode control output voltage of pulse bandwidth.
Transformer 932 has a primary side 936 and a primary side 937, primary side 936 has the multiple function of isolation, transformation and energy storage, on-off action by power switch component 931, when being in the conducting phase (as: MOSFET conducting), voltage gives primary side 936 with supply, primary side 937 induction and storage power, and when the non-conduction phase (as: MOSFET ends), primary side 936 passes to 82 outputs of primary side 937 supplies one electric current with energy stored.
Protective circuit 930 is in order to strangulation voltage, prevents that surging (spike) from taking place to avoid power switch component 931 undermined; Rectifier diode 933 is that the voltage transitions with primary side 937 is a direct current, and again through the described electric current 82 of output behind the filter element 934 filtering ripple compositions, and 82 in electric current is in half period (non-conduction phase) supply output.
Aspect the use of flyback type electric source supply device 9, most important two elements of computer monitor or television set except cathode ray tube, have been exactly flyback type electric source supply device 9 in addition; Yet, along with progressing greatly of liquid crystal film display (TFT LCD) technology, bigger size is used in the LCD of big screen, and the LCD of big screen need in the power supply device of high power (＞150 watts) and big output current, obviously not enough with existing flyback power supply device 9 as power supply supply (several watts～150 watts).
General high-power power supply device has and costs an arm and a leg and shortcoming such as circuit complexity, suppose with the simple and easy and more cheap flyback power supply device 9 of circuit as the power supply supply, the power switch component 931 that need meet the high power specification, yet the power switch component 931 that meets this kind high power specification not only volume becomes greatly and is comparatively expensive, and production cost can't be reduced.
Summary of the invention
Can only be compared to flyback conversion module in the past in half period (non-conduction phase) supply of current output, in the other half period (conducting phase) electric current output is not arranged then, notion of the present invention makes the flyback modular converter electric current output all be arranged to meet the demand of high power electronic product in the complete period (comprising conducting phase and non-conduction phase) exactly.
In addition, involve great expense compared in the past high power power transducer (as: push-pull type change-over circuit), the present invention is based on the flyback change-over circuit, cooperating increases the minority electrons element again, because cost is low, circuit is simple, low cost and high power required in the time of can reaching volume production are exported requirement.
So, a purpose of the present invention, be at the improved flyback type electric source supply device and the power supply device that provide a kind of complete period (comprising conducting phase and non-conduction phase) that electric current output is all arranged, and a kind of improved flyback type electric source supply device that uses lower powered switch element also can reach high power output requirement is provided.
Improved flyback type electric source supply device of the present invention comprises a controller, by controller control conducting whether switch element, one first change-over circuit and one second change-over circuit, and controller switches in a conducting phase and a non-conduction phase in order to the control switch element.
First change-over circuit has first transformer that whether led to by the switch element Control current, and controller control switch element make first transformer in conducting phase and non-conduction phase wherein one during output one first electric current.
Second change-over circuit has second transformer that whether led to by the switch element Control current, the primary side of second transformer is to connect with the primary side of first transformer, the secondary lateral parallel of the primary side of second transformer and first transformer and be connected an output, and second transformer is output one second electric current during wherein another of conducting phase and non-conduction phase, makes output export first electric current and second electric current alternately in non-conduction phase and conducting phase.
Another object of the present invention is at the improved flyback type electric source supply device that a kind of multiple current output is provided.
So each transformer of improved flyback type electric source supply device of the present invention can be provided with two groups of above secondary winding, and each secondary winding of each transformer is connected with corresponding output respectively.
Wherein a kind of enforcement aspect of multiple current output, be to make second transformer of aforesaid improved flyback type electric source supply device have two groups of secondary winding, and each secondary winding of second transformer connects one first output and one second output respectively, first output is in the output of conducting phase and mutual supply one first electric current of non-conduction phase and one second electric current, whereby, second output in non-conduction phase and conducting phase wherein one during the output of supply second electric current.
The enforcement aspect of another kind of multiple current output, be to allow first transformer, second transformer of aforesaid improved flyback type electric source supply device respectively have two groups of secondary winding, and each secondary winding of first transformer connects one first output and one second output respectively, first output and second output also connect each secondary winding of second transformer respectively, and first output and second output all can be in the outputs of non-conduction phase and conducting phase mutual output first electric current and second electric current mutual supply one first electric current and one second electric current.
By increasing another change-over circuit (second change-over circuit) at flyback change-over circuit (first change-over circuit) originally, except half period output current at the flyback change-over circuit that electric current output is arranged originally, the other half period that also adds no current output originally is by the second change-over circuit output current, make the complete period that electric current output all be arranged, can meet the demand of high power electronic product.
Description of drawings
The present invention is described in detail below in conjunction with drawings and Examples:
Fig. 1 is a circuit block diagram of the existing flyback type electric source supply device of explanation;
Fig. 2 is a circuit diagram of each element of having of flyback change-over circuit that the flyback type electric source supply device of key diagram 1 has;
Fig. 3 is a circuit block diagram of explanation improved flyback type electric source supply device of the present invention;
Fig. 4 is a circuit diagram of first preferred embodiment of explanation improved flyback type electric source supply device of the present invention;
Fig. 5 is that explanation first preferred embodiment of the present invention is in the circuit diagram of a conducting phase;
Fig. 6 is that explanation first preferred embodiment of the present invention is in the circuit diagram of a non-conduction phase;
Fig. 7 is an output voltage of first change-over circuit that has of explanation first preferred embodiment of the present invention and the waveform of various electric currents;
Fig. 8 illustrates that be to be electrically connected on second transformer compared to the merit of first preferred embodiment because of the output of adjusting circuit, and this routine merit is to be electrically connected on first transformer to constitute the conducting loop because of the output of adjusting circuit;
Fig. 9 is a circuit diagram of second preferred embodiment of explanation improved flyback type electric source supply device of the present invention, and compared to first preferred embodiment, the position of its first change-over circuit and second change-over circuit is for exchanging;
Figure 10 is a circuit diagram of the 3rd preferred embodiment of explanation improved flyback type electric source supply device of the present invention, and compared to first preferred embodiment, it can export one second electric current in addition to reach the function of multiple current output;
Figure 11 is a circuit diagram of the 4th preferred embodiment of explanation improved flyback type electric source supply device of the present invention, and compared to first preferred embodiment, it can export a total output current in addition to reach the function of multiple current output.
Embodiment
About aforementioned and other technology contents, characteristics and effect of the present invention, in the following detailed description that cooperates with reference to several graphic preferred embodiments, can clearly present.Before the present invention is described in detail, be noted that in the following description content similar elements is to represent with identical numbering.
Consult Fig. 3; design concept of the present invention is: except the wide adjustment controller 10 of a ripple of existing flyback type electric source supply device, a protective circuit (Clamp Circuit) 11, one switch element (representing) 12, an energy-accumulating element 16, an input stage circuit 31, a merit with MOSFET because of adjusting circuit 32, a feedback circuit 33 and one first change-over circuit 1, improved flyback type electric source supply device 100 of the present invention has more one second change-over circuit 2.
The wide adjustment controller 10 of aforesaid ripple, protective circuit (Clamp Circuit) 11, switch element (representing with MOSFET) 12, energy-accumulating element 16, input stage circuit 31, merit are the known elements of general flyback type electric source supply device because of adjusting circuit 32, feedback circuit 33 and first change-over circuit 1; and be described in the prior art, its principle no longer be described at this.
Improvement notion of the present invention is based on existing flyback power-switching circuit, and cooperates improvement to increase circuit element (second change-over circuit 2), reaches the demand that electric current output was all arranged (comprising conducting phase and non-conduction phase) during the complete period whereby.
As shown in Figure 3, Figure 4, first preferred embodiment of improved flyback type electric source supply device 100 of the present invention is described, in this preferred embodiment, first change-over circuit 1 has one first transformer 13, a rectifier cell 14 and a filter element 15; Wherein, rectifier cell 14 is to represent with a rectifier diode, and filter element 15 is to represent with a capacitor.
Explanation with reference to prior art, the flyback power source conversion principle that the current conversion principle of first transformer 13 and prior art are carried is similar, can when the non-conduction phase (MOSFET ends) of switch element 12, export one first electric current 101, not repeat them here its principle.
Different is, because the power supply device 100 of this preferred embodiment also has second change-over circuit 2, therefore can export one second electric current 102 in the conducting phase, whereby, the output of flyback type electric source supply device 100 can be in non-conduction phase and the mutual total output current 103 with first electric current 101 and second electric current 102 of supplying of conducting phase.
In this preferred embodiment, second change-over circuit 2 has one second transformer 21, a rectifier cell 22 and playback (Reset) unit 23, the primary side 211 of second transformer 21 is to connect with the primary side 131 of first transformer 13, and the primary side 212 of second transformer 21 is then in parallel with the primary side 132 of first transformer 13 and be connected an output 41.
(1) when non-conduction phase, the magnetic flux (Flux) of second transformer 21 can be made zero fast, saturated with the iron core (Core) that prevents transformer, and improve transfer ratio.
(2) operating voltage of restriction and strangulation switch element 12 is in the specified safe range operating voltage, is subjected to impact failure to prevent switch element 12 and protective circuit 11 (elementary clamp circuit).
(3) switch element 12 moment of beginning in the non-conduction phase, diode 231 conductings make the primary side 211 of second transformer 21 treat as short circuit, can guarantee that perseverance is in the stable running of the pattern of returning of speeding (Fly back Mode).
Consult Fig. 5 and Fig. 7, the switch element 12 of improved flyback type electric source supply device 110 is in a conducting during phase (as Fig. 7 (a)), its V
DSVoltage is low-voltage, and primary current 105 this moment (as Fig. 7 (b)) not only provides electric current to first transformer 13, for first transformer 13 storage power in wherein; At this moment, identical electric current second transformer 21 of also flowing through, because the current conversion of second transformer 21, just second electric current 102 (as Fig. 7 (d)) of second transformer, 21 outputs is delivered to output 41 through its secondary winding 212 with rectifier diode 22.
Consult Fig. 6 and Fig. 7, the switch element 12 that improved flyback type electric source supply device 110 is described when non-conduction phase (as Fig. 7 (a)), the output that the wide adjustment controller 10 of ripple this moment is not supplied primary current 105 (as Fig. 7 (b)).This moment is because the conversion of first transformer, 13 energy becomes first electric current 101 (as Fig. 7 (c)) output with the power conversion that is stored in first transformer 13, is released into output 41 via secondary winding 132, the rectifier diode 14 of first transformer 13.
Consult Fig. 4 and Fig. 7 again, therefore, by as can be known aforementioned, total output current 103 of output 41 except switch element 12 in conducting during the phase, second electric current 102 that provides by second transformer 21, add switch element 12 in addition when non-conduction phase, first electric current 101 that is provided by first transformer 13 is so total output current 103 (as Fig. 7 (e)) has the output of first electric current 101 and second electric current 102 in the complete period (the conducting phase adds the non-conduction phase).
The V of switch element 12
DSThe waveform of voltage waveform and each electric current 105,101～103 is summarized as follows:
7 (a): be the V of switch element 12
DSVoltage waveform (104) is with the V of general flyback converter (Fly-backConverter)
DSVoltage waveform does not have Iso.
7 (b): the waveform of primary current (Primary Current) 105, when switch element 12 beginning conductings, the waveform of primary current 105 begins to begin to rise to maximum in time with linear mode, switch element 12 not conductings then, primary current makes zero, and another half period begins.
7 (c): be the output waveform of first electric current 101, when switch element 12 in conducting during the phase, output current is maintained zero, waits for just rapidly increasing to maximum when the non-conduction phase is initial, slowly successively decreases in time again.
7 (d): the output waveform that is second electric current 102, itself and primary current 105 waveforms are similar, when switch element 12 in conducting during the phase, its output begins to rise in time, the multiple that cooperates the difference of elementary (Primary) side, secondary (Secondary) side number of turn can obtain primary current 105 concerns.
7 (e): be the waveform of total output current 103 of non-filtered, its average output current is the summation of first electric current 101 and second electric current 102.
As shown in Figure 8, a kind of circuit connecting mode of this preferred embodiment, be merit is electrically connected on first transformer 13 because of the output 321 of adjusting circuit 32 input to constitute the conducting loop, being different from (Fig. 4) originally is to be to be electrically connected on the conducting loop that the input of the energy-accumulating element 16 and second transformer 21 constitutes with merit because of the output 321 of adjusting circuit 32.
Consult Fig. 9, the element that second preferred embodiment of the present invention has is general identical with first embodiment (Fig. 4), and different is with second change-over circuit 2 among first embodiment and mutual reversing of position first change-over circuit 1.
Consult Figure 10, the 3rd preferred embodiment of the present invention mainly is based on first embodiment (Fig. 4), increase by an output circuit 17 again, and second transformer 21 has two groups of secondary winding 212,213, each secondary winding 212,213 connect one first output 411 and one second output 412 respectively, first output 411 and first embodiment of this preferred embodiment are similar, output in conducting phase and mutual supply first electric current 101 of non-conduction phase and second electric current 102, different is that this preferred embodiment also has the output that second output 412 can be supplied one second electric current 102 ' in the conducting phase.
The output circuit 17 of this preferred embodiment has a rectifier cell 171 and a filter element 172, its function class is like rectifier cell 22 and filter element 15, and first transformer 13 of first output 411 and corresponding connection and 21 in second transformer respectively connect rectifier cell 171 and filter element in parallel 172, so except originally in the conducting phase with first output, 411 supplies, second electric current 102, also can be in addition in the conducting phase with extra second electric current 102 ' of second output, 412 supply outputs one to reach the function that multiple current is exported.
Consult Figure 11, be the 4th preferred embodiment of the present invention, mainly be based on first embodiment (Fig. 4), increase by an output circuit 18, and second transformer 21 has two groups of secondary winding 212,213, the secondary winding 212 that first transformer 13 has two groups of secondary winding 132,133, the second transformers 21 is connected one first output 411 ' with the secondary winding 132 of first transformer 13, and secondary winding 213 is connected one second output 412 ' with the secondary winding 133 of first transformer 13.
First output 411 ' and first embodiment of this preferred embodiment are similar, output in conducting phase and mutual supply first electric current 101 of non-conduction phase and second electric current 102, different is, this preferred embodiment also has second output 412 ' can be in conducting phase and mutual supply of non-conduction phase first electric current 101 " with one second electric current 102 " output.
The output circuit 18 of this preferred embodiment has two rectifier cells 181,182 and a filter element 183, its function class is like rectifier cell 22 and filter element 15, but exportable first electric current 101 " and second electric current 102 ", a total output current 103 ' just exported in addition to reach the function of multiple current output.
Conclude above-mentioned, improved flyback type electric source supply device 100 of the present invention all has electric current output in the complete period (comprising conducting phase and non-conduction phase), not only have characteristics such as power saving, high efficiency, high-output power, High Output Current, low Lian Bo, also have the advantage that reduces cost, the volume production of power supply unit (Power Supply) that is particularly suitable for LCD TV (LCD TV), plasma-screen television (PDP TV) and the LCD screen (LCD Monitor) of big screen is used.
Claims (14)
1. an improved flyback type electric source supply device comprises a controller, a switch element and one first change-over circuit, and whether switch element controls conducting by controller, and controller switches in a conducting phase and a non-conduction phase in order to the control switch element; First change-over circuit has first transformer that whether led to by the switch element Control current, controller control switch element make first transformer in conducting phase and non-conduction phase wherein one during output one first electric current, it is characterized in that:
Described improved flyback type electric source supply device also comprises one second change-over circuit, second change-over circuit has second transformer that whether led to by the switch element Control current, the primary side of second transformer is to connect with the primary side of first transformer, the secondary lateral parallel of the primary side of second transformer and first transformer and be connected an output, and second transformer is output one second electric current during wherein another of conducting phase and non-conduction phase, makes output export first electric current and second electric current alternately in non-conduction phase and conducting phase.
2. improved flyback type electric source supply device as claimed in claim 1 is characterized in that:
The primary side of first transformer and primary side polarity are different, the primary side of second transformer is identical with primary side polarity, controller control switch element switches to conducting during the phase, make not output current and second transformer is exported one second electric current of first transformer, and when non-conduction phase, make not output current and first transformer is exported first electric current of second transformer.
3. improved flyback type electric source supply device as claimed in claim 1 is characterized in that:
Second change-over circuit also has a playback circuit in order in the non-conduction phase magnetic flux of second transformer is made zero fast, the playback circuit has playback winding, a diode and a capacitor, the playback winding electric is connected in the primary side of second transformer, and identical with the primary side polarity of second transformer, both are parallel to diode and capacitor between playback winding and output.
4. improved flyback type electric source supply device as claimed in claim 1 is characterized in that:
Improved flyback type electric source supply device also has a protective circuit that is electrically connected on the switch element and second transformer bay, and is electrically connected rectifier cell, between first transformer and output and is electrically connected on a filter element between rectifier cell and output and a feedback circuit that is electrically connected between controller and output.
5. improved flyback type electric source supply device as claimed in claim 1 is characterized in that:
The input of first change-over circuit also is electrically connected an energy-accumulating element.
6. improved flyback type electric source supply device as claimed in claim 1 is characterized in that:
Improved flyback type electric source supply device more comprises a merit because of adjusting circuit, and merit is to be electrically connected on first transformer to constitute the conducting loop because of the output of adjusting circuit.
7. improved flyback type electric source supply device as claimed in claim 1 is characterized in that:
Improved flyback type electric source supply device more comprises a merit because of adjusting circuit, and merit is to be electrically connected on second transformer to constitute the conducting loop because of the output of adjusting circuit.
8. an improved flyback type electric source supply device comprises a controller, a switch element and one first change-over circuit, and whether switch element controls conducting by controller, and controller switches in a conducting phase and a non-conduction phase in order to the control switch element; First change-over circuit has first transformer that whether led to by the switch element Control current, controller control switch element make first transformer in conducting phase and non-conduction phase wherein one during output one first electric current, it is characterized in that:
Described improved flyback type electric source supply device also includes one second change-over circuit, second change-over circuit has second transformer that whether led to by the switch element Control current, the primary side of second transformer is to connect with the primary side of first transformer, the secondary lateral parallel of the primary side of second transformer and first transformer and be connected one first output, and second transformer is output one second electric current during wherein another of conducting phase and non-conduction phase, makes the output of winning export first electric current and second electric current alternately in non-conduction phase and conducting phase; And second transformer has two groups of secondary winding, and each secondary winding of second transformer connects aforesaid first output and one second output respectively, whereby, second output in non-conduction phase and conducting phase wherein one during supply second electric current output.
9. improved flyback type electric source supply device as claimed in claim 8 is characterized in that:
Respectively connect between first Secondary winding of transformer of first output and corresponding connection and second Secondary winding of transformer rectifier cell and a filter element in parallel.
10. improved flyback type electric source supply device as claimed in claim 8 is characterized in that:
Series connection one rectifier cell and a filter element in parallel between the secondary winding of second output and corresponding connection.
11. improved flyback type electric source supply device as claimed in claim 8 is characterized in that:
Second change-over circuit also has a playback circuit, the playback circuit has playback winding, a diode and a capacitor, the playback winding electric is connected in the primary side of second transformer, and identical with the primary side polarity of second transformer, both are parallel to diode and capacitor between the playback winding and first output.
12. an improved flyback type electric source supply device comprises a controller, a switch element and one first change-over circuit, whether switch element controls conducting by controller, and controller switches in a conducting phase and a non-conduction phase in order to the control switch element; First change-over circuit has first transformer that whether led to by the switch element Control current, controller control switch element make first transformer in conducting phase and non-conduction phase wherein one during output one first electric current, it is characterized in that:
Described improved flyback type electric source supply device also comprises one second change-over circuit, second change-over circuit has second transformer that whether led to by the switch element Control current, the primary side of second transformer is to connect with the primary side of first transformer, the secondary lateral parallel of the primary side of second transformer and first transformer and be connected one first output, and second transformer is output one second electric current during wherein another of conducting phase and non-conduction phase, makes the output of winning export first electric current and second electric current alternately in non-conduction phase and conducting phase; And first transformer, second transformer respectively have two groups of secondary winding, and each secondary winding of first transformer connects first output and second output respectively, first output and second output also connect each secondary winding of second transformer respectively, whereby, first output and second output all can be in non-conduction phase and conducting phase mutual output first electric current and second electric currents.
13. improved flyback type electric source supply device as claimed in claim 12 is characterized in that:
Respectively connect between first Secondary winding of transformer of first output and corresponding connection and second Secondary winding of transformer rectifier cell and a filter element in parallel.
14. improved flyback type electric source supply device as claimed in claim 12 is characterized in that:
Respectively connect between first Secondary winding of transformer of second output and corresponding connection and second Secondary winding of transformer rectifier cell and a filter element in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610007378 CN101022245A (en) | 2006-02-13 | 2006-02-13 | Improved flyback type electric source supply device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610007378 CN101022245A (en) | 2006-02-13 | 2006-02-13 | Improved flyback type electric source supply device |
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| CN101022245A true CN101022245A (en) | 2007-08-22 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI398081B (en) * | 2010-03-12 | 2013-06-01 | Richtek Technology Corp | Power supply with reduced power consumption |
| WO2013170658A1 (en) * | 2012-05-15 | 2013-11-21 | 迈象电子科技（上海）有限公司 | Flyback circuit and method for reducing leakage inductance incurred loss of transformer with flyback circuit |
| TWI800101B (en) * | 2021-11-16 | 2023-04-21 | 致茂電子股份有限公司 | Ac-dc power conversion module and driving method thereof |
-
2006
- 2006-02-13 CN CN 200610007378 patent/CN101022245A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI398081B (en) * | 2010-03-12 | 2013-06-01 | Richtek Technology Corp | Power supply with reduced power consumption |
| WO2013170658A1 (en) * | 2012-05-15 | 2013-11-21 | 迈象电子科技（上海）有限公司 | Flyback circuit and method for reducing leakage inductance incurred loss of transformer with flyback circuit |
| TWI800101B (en) * | 2021-11-16 | 2023-04-21 | 致茂電子股份有限公司 | Ac-dc power conversion module and driving method thereof |
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