CN101610030A - Power supply change-over device - Google Patents
Power supply change-over device Download PDFInfo
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- CN101610030A CN101610030A CNA2008101259802A CN200810125980A CN101610030A CN 101610030 A CN101610030 A CN 101610030A CN A2008101259802 A CNA2008101259802 A CN A2008101259802A CN 200810125980 A CN200810125980 A CN 200810125980A CN 101610030 A CN101610030 A CN 101610030A
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Abstract
The invention discloses a kind of power supply change-over device,, comprise suitching type voltage conversion circuit and current potential adjustment circuit in order to receive input voltage and conversion generation output voltage.The suitching type voltage conversion circuit comprises inductance, diverter switch and synchronous rectifier, the energy storage action that diverter switch is wherein carried out in inductance in order to disconnection/conducting.The electric energy that synchronous rectifier stores when moving by above-mentioned energy storage produces output voltage.In addition, current potential is adjusted circuit and is connected across on the diverter switch, in order to reduce the voltage difference at diverter switch two ends.
Description
Technical field
The present invention relates to a kind of power supply change-over device, and be particularly related to a kind of DC-DC power supply conversion equipment.
Background technology
Along with the progress of electronics technology, people also increase day by day for the requirement of the product of electronic correlation.For people are provided inexpensive commodity, volume how effectively to save electronic product has become design of electronic products person's important topic now.Because in the general electronic installation, all need the power supply of many groups to provide as operating voltage, for fear of using a plurality of bulky transformers that the power supply of these different voltages is provided, power supply change-over device (Power Converter) becomes a kind of power supply device that welcome by the designer.
Yet general DC-DC power supply conversion equipment (DC DC converter) all is the function that the mode of utilizing switch to switch is finished its power source conversion, therefore, and the also inevasible generation of the phenomenon of a kind of so-called ring (ring).Below please refer to Figure 1A, Figure 1A illustrates the circuit diagram of known DC-DC power supply conversion equipment.Power supply change-over device 10 wherein is made of inductance L 1, switch SW 1, switch SW 2, capacitor C 1 and capacitor C 2.When terminal A receives input voltage and terminal B when producing output voltage, power supply change-over device 10 is the power supply change-over device of boost type (boost).Opposite, when terminal B receives input voltage and terminal A when producing output voltage, power supply change-over device 10 is the power supply change-over device of buck (buck).
No matter power supply change-over device 10 is the power supply change-over devices as boost type or buck, after discharging electric energy fully in inductance L 1, switch SW 1, SW2 can disconnect simultaneously for some time and form open circuit (open), and will produce so-called ringing in the moment that enters this state.
Below please refer to Figure 1B, Figure 1B is to be that the electric current I L1 of the shown switch SW 1 of example, SW2 and end points C voltage VC and inductance L 1 is to time relation figure with the buck power supply change-over device.Before during entering that switch SW 1, SW2 open a way simultaneously, switch SW 1 is conducting.And this moment, inductance L 1 was a zero potential with the voltage that couples end points C of switch SW 1, behind switch SW 1 open circuit (entering interval TR), terminal A (current potential is VA) must be by 1 pair of end points C charging of inductance L (it is identical with the current potential VA of terminal A that it is charged to), thereby can in interval TR, produce ringing.And ringing wherein as the electric current I L1 of end points C voltage VC among the interval TC shown in Fig. 1 C and inductance L 1 to time relation figure.
In like manner, in the boost type power supply change-over device, enter that switch SW 1, SW2 open a way simultaneously during before, switch SW 2 is conducting, at this moment, the current potential of end points C equals the current potential of terminal B.And behind switch SW 2 open circuits, end points C must discharge into terminal A by inductance L 1, the same phenomenon that also can produce ring.
Above-mentioned ringing can produce extra noise and electromagnetic interference (Electromagneticinterference, EMI).Therefore, the power supply change-over device that some high standards require can make two end points of inductance L 1 form short circuit when switch SW 1, SW2 open a way, and makes that the above-mentioned behavior of discharging and recharging is unlikely to produce ringing by inductance L 1.Yet this kind method must increase the additional pin that is connected to terminal A in the process with circuit chipization, cause the waste of circuit area.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of power supply change-over device, effectively reduces the ringing that is produced in the power source conversion process.
The technical problem to be solved in the present invention solves by a kind of power supply change-over device, and this power supply change-over device comprises suitching type voltage conversion circuit and current potential adjustment circuit in order to receive input voltage and conversion generation output voltage.The suitching type voltage conversion circuit comprises inductance, diverter switch and synchronous rectifier.The energy storage action that diverter switch is wherein carried out at inductance in order to disconnection/conducting.And synchronous rectifier during by above-mentioned energy storage action stored electric energy produce output voltage.In addition, current potential is adjusted circuit and is connected across on the diverter switch, in order to reduce the voltage difference at diverter switch two ends.
In one embodiment of the invention, above-mentioned current potential adjustment circuit comprises that first adjusts the switch and first resistance.First adjusts the end that switch is coupled to diverter switch.First resistance string is connected on first and adjusts between the other end of switch and diverter switch.Wherein when first adjusted switch conduction, current potential was adjusted circuit and is adjusted and reduce the voltage difference at these diverter switch two ends by first resistance.
In one embodiment of this invention, above-mentioned current potential adjustment circuit comprises that a plurality of second adjusts switch and a plurality of second resistance.Second adjusts the end that switch is coupled to diverter switch jointly, and second resistance is serially connected in respectively between the other end of these second adjustment switches and diverter switch; Wherein when these second adjustment switches were switched on respectively, current potential was adjusted circuit and is adjusted and reduce the voltage difference at diverter switch two ends by pairing these second resistance.
In one embodiment of this invention, above-mentioned current potential adjustment circuit comprises first switch, second switch and electric capacity.One end of first switch is coupled to an end of diverter switch, and an end of second switch is coupled to the other end of diverter switch.And an end of electric capacity is coupled to the other end of first switch and the other end of second switch jointly, and the other end of electric capacity is coupled to earthed voltage.First switch wherein and the disconnection/turn-on action of second switch are anti-phase.
In one embodiment of this invention, above-mentioned current potential is adjusted circuit and is comprised Voltage-controlled Current Source, is serially connected between an end and the other end of diverter switch, produces balanced balanced current according to the voltage difference at the two ends of diverter switch.
In one embodiment of this invention, above-mentioned suitching type voltage conversion circuit is the boost type voltage conversion circuit.
In one embodiment of this invention, wherein a termination of inductance is received input voltage, and diverter switch is serially connected with between the other end and earthed voltage of inductance.And the other end of an end of synchronous rectifier, inductance and diverter switch couple jointly, and the other end of synchronous rectifier produces output voltage.
In one embodiment of this invention, power supply change-over device wherein more comprises storage capacitors, is coupled between the other end and earthed voltage of synchronous rectifier.
In one embodiment of this invention, wherein more comprise electric capacity of voltage regulation, be coupled between an end and earthed voltage of inductance reception input voltage.
In one embodiment of this invention, following suitching type voltage conversion circuit is the buck voltage conversion circuit.
In one embodiment of this invention, wherein a termination of diverter switch is received input voltage, and the other end of diverter switch couples an end of inductance.And the other end of inductance produces output voltage, and an end of an end of synchronous rectifier and inductance and the other end of diverter switch couple jointly.The other end of synchronous rectifier then is coupled to earthed voltage.
In one embodiment of this invention, synchronous rectifier wherein comprises rectifier switch.
The present invention adjusts the structure of circuit because of adopting current potential, therefore can effectively carry out the precharge action at the buck power supply change-over device respectively, carries out pre-arcing action, the effectively generation of suppressed ringing phenomenon at the boost type power supply change-over device.
Description of drawings
For above-mentioned feature and advantage of the present invention can be become apparent, preferred embodiment cited below particularly, and conjunction with figs. are described in detail below.
Figure 1A illustrates the circuit diagram of known DC-DC power supply conversion equipment;
Figure 1B illustrates the electric current I L1 of switch SW 1, SW2 and end points C voltage VC and inductance L 1 to time relation figure;
The end points C voltage VC among the interval TC shown in Fig. 1 C and the electric current I L1 of inductance L 1 are to time relation figure;
Fig. 2 A illustrates the power supply change-over device schematic diagram of first embodiment of the invention;
Fig. 2 B～Fig. 2 D illustrates the circuit diagram of power supply change-over device 20 under different potentials adjustment circuit 220 execution modes;
Fig. 3 A illustrates the power supply change-over device schematic diagram of second embodiment of the invention;
Fig. 3 B～Fig. 3 D illustrates the circuit diagram of power supply change-over device 30 under different potentials adjustment circuit 320 execution modes respectively.
Embodiment
Below will propose a plurality of embodiment and a plurality of execution mode is illustrated, and assistant can understand more in the hope of those of ordinary skills with diagram at power supply change-over device of the present invention, and implement according to this.
First embodiment:
Below please refer to Fig. 2 A, Fig. 2 A illustrates the power supply change-over device schematic diagram of first embodiment of the invention.Power supply change-over device 20 wherein is the power supply change-over device of boost type, comprises suitching type voltage conversion circuit 210 and current potential adjustment circuit 220.And suitching type voltage conversion circuit 210 is by inductance L 1, electric capacity of voltage regulation C 1, storage capacitors C2, diverter switch SW1, synchronous rectifier 211.Wherein a termination of inductance L 1 is received input voltage VIN, diverter switch SW1 is serially connected with between the other end and earthed voltage GND of inductance L 1, one end of synchronous rectifier 211, the other end of inductance L 1 and diverter switch SW1 couple jointly, and the other end of synchronous rectifier 211 produces output voltage VO UT.211 of synchronous rectifiers are made of rectifier switch SW2.
Aspect the molar behavior of power supply change-over device 20, at first, diverter switch SW1 conducting and rectifier switch SW2 open circuit make inductance L 1 be received input voltage VIN and carry out the energy storage action.Then, disconnect diverter switch SW1, and conducting rectifier switch SW2.The electric energy that be stored in the inductance L 1 this moment flows to storage capacitors C2 via rectifier switch SW2, and then makes output voltage VO UT rise.
Then rectifier switch SW2 is disconnected, and the current potential of the end points that inductance L 1 couples with rectifier switch SW2 can be discharged to and equaled input voltage VIN this moment, was able to smooth-going and unlikely generation ringing for making this discharging action, adjusted circuit 220 with the time initiate potential.Current potential is adjusted the two ends that circuit 220 is connected across diverter switch SW1, and in this first embodiment, current potential is adjusted circuit 220 and comprised adjustment switch S 1 and resistance R 1.When current potential adjustment circuit 220 is activated, to adjust switch S 1 and be switched on, the current potential of the end points that inductance L 1 and rectifier switch SW2 couple then carries out the pre-arcing action by adjusting switch S 1 and resistance R 1, and then the generation of reduction ringing.
It should be noted that resistance R 1 comprises utilizes variable resistor to come construction.When the voltage difference at diverter switch SW1 two ends is very big, can adjusts and make resistance R 1 have less resistance value, with speed discharge faster.And when reducing because of discharge gradually along with the voltage difference at diverter switch SW1 two ends, the resistance of resistance R 1 then can be transferred greatly gradually, makes the efficient reduction of power supply change-over device to avoid extra discharge.
In addition, current potential adjustment circuit 220 can also be implemented with different modes.Please refer to Fig. 2 B, Fig. 2 B illustrates the circuit diagram of power supply change-over device 20 under another current potential adjustment circuit 220 execution modes.In this execution mode, current potential is adjusted circuit 220 and is made of a plurality of adjustment switch S 2, S3, S4 and a plurality of resistance R 2, R3, R4.Wherein, an end of adjusting switch S 2～S4 is coupled to the end of diverter switch SW1 jointly, and the end of resistance R 2～R4 then couples with the other end of adjusting switch S 2～S4 respectively, and the other end of resistance R 2～R4 then is coupled to the other end of diverter switch SW1 jointly.
Adjust at this kind current potential under the execution mode of circuit 220, in the time will carrying out the action of pre-arcing at the beginning, adjustment switch S 2～S4 that conducting is all.And in the process of discharge, disconnect in regular turn and adjust switch S 2～S4 after all adjustment switch S 2～S4 are disconnected, promptly finish the pre-arcing action.The characteristics that the resistance parallel way is organized in this utilization more are to be that the parallel resistor number is many more, and the resistance change that is produced in disconnecting the process of adjusting switch will be mild more.In other words, the change of the discharging current that produced of discharging under this structure also can be more mild.
Please note at this, the above-mentioned use of mentioning three groups of adjustment switch S 2～S4 and resistance R 2～R4 are an example, more switch and resistance (greater than 3 groups) or adjustment switch still less and the resistance (two groups) adjusted, can be used for implementing current potential and adjust circuit 220, not limit the present invention.
In addition, below will reintroduce the execution mode that another kind of current potential is adjusted circuit, and please refer to Fig. 2 C, Fig. 2 C illustrates the circuit diagram of power supply change-over device 20 under another current potential adjustment circuit 220 execution modes.In the present embodiment, current potential adjustment circuit 220 utilizes a kind of so-called switching type capacitor (switchingcapacitor) to constitute.One end of switch S 5 wherein is coupled to the end of diverter switch SW1, and an end of switch S 6 is coupled to the other end of diverter switch SW1, and an end of capacitor C 3 is coupled to the other end of switch S 5 and the other end of switch S 6 jointly, and the other end of capacitor C 3 is coupled to earthed voltage GND.Switch S 5 wherein is anti-phase with the disconnection turn-on action of switch S 6.
At this, current potential is adjusted circuit 220 and is utilized the switch S 5 and switch S 6 that continues anti-phase switching, and cooperates capacitor C 3 to form an equivalent resistance, and equivalent resistance wherein equals 1/ (C3*f
Sw), f wherein
SwBe the switching frequency of switch S 5 with switch S 6.That is to say, utilize the speed of the switching frequency that changes switch S 5 and switch S 6, just can CONTROLLED POTENTIAL adjust the equivalent resistance of circuit 220, and then control the pre-arcing size of current and the velocity of discharge.
Then referring again to Fig. 2 D, Fig. 2 D illustrates the circuit diagram of power supply change-over device 20 under another current potential adjustment circuit 220 execution modes.In the present embodiment, current potential adjustment circuit 220 is made of a Voltage-controlled Current Source I1.Voltage-controlled Current Source I1 is connected across the two ends of diverter switch SW1, voltage difference according to diverter switch SW1 two ends produces electric current, and utilize this electric current to carry out the action of pre-arcing, reducing the voltage difference at diverter switch SW1 two ends, and then reduce the generation of ringing.In addition, Voltage-controlled Current Source I1 can utilize transistor to constitute, and this method of using transistor to constitute Voltage-controlled Current Source can be understood easily as those of ordinary skills, then seldom gives unnecessary details herein.
In the same manner, the present invention also can control the electric current that Voltage-controlled Current Source I1 is exported.For instance, when the voltage difference at diverter switch SW1 two ends is very big, can make the bigger electric current of Voltage-controlled Current Source I1 output, with rapid discharge; And when reducing because of discharge gradually along with the voltage difference at diverter switch SW1 two ends, the electric current that Voltage-controlled Current Source I1 exported just can be turned down gradually, to avoid extra discharge the efficient of power supply change-over device is reduced.
What deserves to be mentioned is, this first embodiment with and current potential adjust in the various execution mode of circuit 220, synchronous rectifier 211 is to be made of rectifier switch SW2, and the above-mentioned various switches of mentioning (comprising diverter switch SW1, rectifier switch SW2, adjustment switch S 1～S4 and switch S 5, S6) can utilize transistor to constitute, and utilize these transistorized grid voltages of control to disconnect/these switches of conducting.This method of utilizing transistor to constitute switch is similarly those of ordinary skills can be understood easily, does not add to give unnecessary details herein.
Second embodiment:
Below please refer to Fig. 3 A, Fig. 3 A illustrates the power supply change-over device schematic diagram of second embodiment of the invention.Power supply change-over device 30 is the power supply change-over device of a buck, comprises suitching type voltage conversion circuit 310 and current potential adjustment circuit 320.And suitching type voltage conversion circuit 310 is by inductance L 1, electric capacity of voltage regulation C2, storage capacitors C1, diverter switch SW2, synchronous rectifier 311.Wherein the termination of diverter switch SW2 is received input voltage VIN, and the other end of diverter switch SW2 couples an end of inductance L 1, and the other end of inductance L 1 produces output voltage VO UT.In addition, the other end of an end of synchronous rectifier 311 and an end of inductance L 1 and diverter switch SW2 couples jointly, and the other end of synchronous rectifier 311 is coupled to earthed voltage GND.In addition, 311 of synchronous rectifiers are made of rectifier switch SW1.
Aspect the molar behavior of power supply change-over device 30, at first, diverter switch SW2 conducting and rectifier switch SW1 open circuit make inductance L 1 be able to receive input voltage VIN by diverter switch SW2 and carry out the energy storage action.Then, disconnect diverter switch SW2, and conducting rectifier switch SW1.Inductance L 1 release electric energy produced by earthed voltage GND end and flowed to the electric current of storage capacitors C1 through rectifier switch SW1, and makes output voltage VO UT descend this moment.
Then rectifier switch SW1 is disconnected, and the current potential of the end points that inductance L 1 couples with rectifier switch SW1 can be charged to and equaled output voltage VO UT this moment, was able to smooth-going and unlikely generation ringing for making this charging action, and initiate potential is adjusted circuit 320 simultaneously.Current potential is adjusted the two ends that circuit 320 is connected across diverter switch SW2.Similar with first embodiment, in this second embodiment, current potential is adjusted circuit 320 and is comprised adjustment switch S 1 and resistance R 1 equally.When current potential adjustment circuit 320 is activated, to adjust switch S 1 and be switched on, the current potential of the end points that inductance L 1 and rectifier switch SW1 couple then carries out the precharge action by adjusting switch S 1 and resistance R 1, and then the generation of reduction ringing.
In addition, identical with first embodiment, the current potential among this second embodiment is adjusted circuit 320 and equally can be implemented by different ways.Below please refer to Fig. 3 B～Fig. 3 D, Fig. 3 B～Fig. 3 D illustrates the circuit diagram of power supply change-over device 30 under different potentials adjustment circuit 320 execution modes respectively.
Wherein the adjustment of the current potential among Fig. 3 B circuit 320 is by a plurality of switch S 2～S4 and constitutes with its series resistor R2～R4 respectively, it is to be made of so-called switching type capacitor that current potential among Fig. 3 C is adjusted 320 in circuit, and the current potential among Fig. 3 D is adjusted 320 in circuit and is made of Voltage-controlled Current Source I1.The method of operating that above-mentioned these different current potentials are adjusted circuit 320 execution modes all with first embodiment in illustrated identical, unique different be current potential in first embodiment to adjust circuit 220 are actions of carrying out pre-arcing, and current potential in a second embodiment to adjust circuit 320 be to carry out precharge action.Therefore adjust the no longer repeat specification of action details of circuit 320 at these current potentials.
In sum, the present invention utilizes current potential adjustment circuit to carry out corresponding precharge or pre-arcing action at power supply change-over device.This current potential is adjusted circuit and is not needed to carry out precharge or pre-arcing by inductance, and when circuit carries out chip, does not need unnecessary pin, and then effectively reduces the generation of ringing under the situation that does not increase circuit area.
Though the present invention discloses as above with preferred embodiment, so it is not in order to qualification the present invention, and the those of ordinary skill in any affiliated technical field under the situation that does not break away from the spirit and scope of the present invention, can carry out suitable change and retouching.
Claims (19)
1. a power supply change-over device produces output voltage in order to receive input voltage and to change, and comprising:
The suitching type voltage conversion circuit, comprise inductance, diverter switch and synchronous rectifier, the electric energy that the wherein energy storage action carried out in this inductance in order to disconnection/conducting of this diverter switch, this synchronous rectifier store during by this energy storage action produces this output voltage; And
Current potential is adjusted circuit, is connected across on this diverter switch, in order to reduce the voltage difference at these diverter switch two ends.
2. power supply change-over device according to claim 1, wherein this current potential is adjusted circuit and is all formed when opening circuit at this diverter switch and this synchronous rectifier, reduces the voltage difference at these diverter switch two ends.
3. power supply change-over device according to claim 2, wherein this current potential adjustment circuit comprises:
First adjusts switch, is coupled to an end of this diverter switch; And
First resistance is serially connected between the other end of this first adjustment switch and this diverter switch;
Wherein all form when opening circuit when this diverter switch and this synchronous rectifier, this first adjusts switch conduction, adjusts and reduce the voltage difference at these diverter switch two ends so that this current potential is adjusted circuit by this first resistance.
4. power supply change-over device according to claim 3, wherein this first resistance is variable resistor, this variable-resistance resistance changes according to the voltage difference size at these diverter switch two ends.
5. power supply change-over device according to claim 2, wherein this current potential adjustment circuit comprises:
A plurality of second adjusts switch, is coupled to an end of this diverter switch jointly; And
A plurality of second resistance are serially connected in respectively between the other end of these second adjustment switches and this diverter switch;
Wherein all form when opening circuit when this diverter switch and this synchronous rectifier, these second are adjusted switches and are switched on respectively, adjust and reduce the voltage difference at these diverter switch two ends so that this current potential is adjusted circuit by pairing these second resistance.
6. power supply change-over device according to claim 5, wherein the equivalent resistance of these a plurality of second resistance changes according to the voltage difference size at these diverter switch two ends.
7. power supply change-over device according to claim 2, wherein this current potential adjustment circuit comprises:
First switch, one end are coupled to an end of this diverter switch;
Second switch, the one end is coupled to the other end of this diverter switch; And
Electric capacity, one end are coupled to the other end of this first switch and the other end of this second switch jointly, and the other end of this electric capacity is coupled to earthed voltage;
Wherein, disconnection/the turn-on action of this first switch and this second switch is anti-phase, and all form when opening circuit when this diverter switch and this synchronous rectifier, this first switch and this second switch carry out switch with switching frequency and switch, so that this current potential is adjusted the circuit adjustment and reduced the voltage difference at these diverter switch two ends.
8. power supply change-over device according to claim 7, wherein the switching frequency of this first switch and this second switch changes according to the voltage extent at these diverter switch two ends, so that the equivalent impedance that this electric capacity had changes according to the voltage extent at these diverter switch two ends.
9. power supply change-over device according to claim 2, wherein this current potential adjustment circuit comprises:
Voltage-controlled Current Source is serially connected between the end and the other end of this diverter switch, is used for all forming when opening circuit when this diverter switch and this synchronous rectifier, produces balanced balanced current.
10. power supply change-over device according to claim 9, wherein this balanced balanced current of exporting of this Voltage-controlled Current Source changes according to the voltage extent at these diverter switch two ends.
11. power supply change-over device according to claim 1, wherein this suitching type voltage conversion circuit is the boost type voltage conversion circuit.
12. power supply change-over device according to claim 11, wherein a termination of this inductance is received this input voltage, this diverter switch is serially connected with between the other end and earthed voltage of this inductance, one end of this synchronous rectifier, the other end of this inductance and this diverter switch couple jointly, and the other end of this synchronous rectifier produces this output voltage.
13. power supply change-over device according to claim 12 wherein also comprises:
Storage capacitors is coupled between the other end and this earthed voltage of this synchronous rectifier.
14. power supply change-over device according to claim 12 wherein also comprises:
Electric capacity of voltage regulation is coupled between the end and this earthed voltage that this inductance receives this input voltage.
15. power supply change-over device according to claim 1, wherein this suitching type voltage conversion circuit is the buck voltage conversion circuit.
16. power supply change-over device according to claim 15, wherein a termination of this diverter switch is received this input voltage, the other end of this diverter switch couples an end of this inductance, the other end of this inductance produces this output voltage, one end of this synchronous rectifier and an end of this inductance and the other end of this diverter switch couple jointly, and the other end of this synchronous rectifier is coupled to this earthed voltage.
17. power supply change-over device according to claim 16 wherein also comprises:
Storage capacitors is coupled between the other end and this earthed voltage of this inductance.
18. power supply change-over device according to claim 16 wherein also comprises:
Electric capacity of voltage regulation is coupled between the end and this earthed voltage that this diverter switch receives this input voltage.
19. power supply change-over device according to claim 1, wherein this synchronous rectifier comprises rectifier switch.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2008101259802A CN101610030A (en) | 2008-06-16 | 2008-06-16 | Power supply change-over device |
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2008101259802A CN101610030A (en) | 2008-06-16 | 2008-06-16 | Power supply change-over device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102570856A (en) * | 2010-12-12 | 2012-07-11 | 波音公司 | Synchronous rectified switch with auto fault clearing |
| CN103840448A (en) * | 2014-04-01 | 2014-06-04 | 国家电网公司 | High-voltage connecting device with arc protection function |
| CN103973094A (en) * | 2014-05-23 | 2014-08-06 | 东南大学 | Rapid precharging circuit for modular multi-level converter |
| CN102570856B (en) * | 2010-12-12 | 2016-12-14 | 波音公司 | There is the synchronous rectification switch that automatic fault is removed |
| CN113078816A (en) * | 2020-01-06 | 2021-07-06 | 中芯国际集成电路制造(上海)有限公司 | Voltage conversion circuit |
-
2008
- 2008-06-16 CN CNA2008101259802A patent/CN101610030A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102570856A (en) * | 2010-12-12 | 2012-07-11 | 波音公司 | Synchronous rectified switch with auto fault clearing |
| CN102570856B (en) * | 2010-12-12 | 2016-12-14 | 波音公司 | There is the synchronous rectification switch that automatic fault is removed |
| CN103840448A (en) * | 2014-04-01 | 2014-06-04 | 国家电网公司 | High-voltage connecting device with arc protection function |
| CN103973094A (en) * | 2014-05-23 | 2014-08-06 | 东南大学 | Rapid precharging circuit for modular multi-level converter |
| CN113078816A (en) * | 2020-01-06 | 2021-07-06 | 中芯国际集成电路制造(上海)有限公司 | Voltage conversion circuit |
| CN113078816B (en) * | 2020-01-06 | 2022-07-05 | 中芯国际集成电路制造(上海)有限公司 | Voltage conversion circuit |
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Open date: 20091223 |