CN108712088A - A kind of switching power circuit inhibiting EFT harassing and wrecking - Google Patents
A kind of switching power circuit inhibiting EFT harassing and wrecking Download PDFInfo
- Publication number
- CN108712088A CN108712088A CN201810609723.XA CN201810609723A CN108712088A CN 108712088 A CN108712088 A CN 108712088A CN 201810609723 A CN201810609723 A CN 201810609723A CN 108712088 A CN108712088 A CN 108712088A
- Authority
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- China
- Prior art keywords
- circuit
- switching power
- common
- eft
- mode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
-
- 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
- H02M1/12—Arrangements for reducing harmonics from ac input or output
-
- 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
- H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
-
- 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
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0038—Circuits or arrangements for suppressing, e.g. by masking incorrect turn-on or turn-off signals, e.g. due to current spikes in current mode control
-
- 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
- H02M1/12—Arrangements for reducing harmonics from ac input or output
- H02M1/123—Suppression of common mode voltage or current
Abstract
The invention discloses a kind of switching power circuits of inhibition EFT harassing and wrecking, including：ON-OFF control circuit, loop feedback and the current rectifying and wave filtering circuit being sequentially connected in series, transformer conversion circuit, output rectifier and filter；For equipment power supply switching power circuit further include：First input end is connect with firewire in power grid, the second input terminal is connect with zero curve in power grid, the first common-mode circuit of the input terminal connection of output end and current rectifying and wave filtering circuit；Second common-mode circuit of the input terminal connection of the direct current supply line of the connection of the output end of input terminal and output rectifier and filter, output end and equipment；The two is used to inhibit the electrical fast transient (eft) EFT harassing and wrecking in switching power circuit.It can be seen that, the input terminal of switching power circuit and output end are separately added into the first common-mode circuit and the second common-mode circuit in the application, it is used for that the EFT in switching power circuit is inhibited to harass, to the output voltage of stable switch power circuit, and then maintains the normal work of equipment.
Description
Technical field
The present invention relates to switch power technology fields, more particularly to a kind of switching power circuit of inhibition EFT harassing and wrecking.
Background technology
With the development of switch power technology, the switching power circuit for equipment power supply is used widely.The prior art
In, switching power circuit include inductive load, when inductive load is open or closed, because switch contact gap insulation breakdown or
The reasons such as contact bounce will produce a series of transient state pulse at switch, that is, generate EFT (Electrical Fast
Transient, electrical fast transient (eft)) harassing and wrecking, when inductive load be repeated several times break-make, then impulse train again can with it is corresponding when
Between gap be repeated several times and occur, fluctuate, and then the normal work of equipment made so as to cause the output voltage of switching power circuit
At influence.
Therefore, how to provide it is a kind of solve above-mentioned technical problem scheme be that those skilled in the art needs to solve at present
The problem of.
Invention content
The object of the present invention is to provide a kind of switching power circuits of inhibition EFT harassing and wrecking, and input terminal and output end add respectively
Enter the first common-mode circuit and the second common-mode circuit, be used for that the EFT in switching power circuit is inhibited to harass, to stable switch electricity
The output voltage of source circuit, and then maintain the normal work of equipment.
In order to solve the above technical problems, the present invention provides a kind of switching power circuits of inhibition EFT harassing and wrecking, including：Point
The ON-OFF control circuit that is not connect with loop feedback and transformer conversion circuit is connect with the transformer conversion circuit
The loop feedback and the current rectifying and wave filtering circuit being sequentially connected in series, the transformer conversion circuit, output rectifier and filter；
For equipment power supply the switching power circuit further include：
First input end is connect with firewire in power grid, the second input terminal is connect with zero curve in the power grid, the first output end
It is connect with the input positive terminal of the current rectifying and wave filtering circuit, second output terminal is connect with the input negative terminal of the current rectifying and wave filtering circuit
First common-mode circuit；
First input end is connect with the output plus terminal of the output rectifier and filter, the second input terminal and the output are whole
Flow filter circuit output negative terminal connect, the first output end connect with the input positive terminal of the direct current supply line of the equipment, second
The second common-mode circuit that output end is connect with the input negative terminal of the direct current supply line；
First common-mode circuit and second common-mode circuit are used to inhibit the electricity in the switching power circuit fast
Fast transient pulse train EFT harassing and wrecking.
Preferably, first common-mode circuit and second common-mode circuit include N grades of common mode sub-circuits, wherein N is
Integer more than 1.
Preferably, M common mode sub-circuit is specially common mode inductance, N-M common mode sub-circuit in the N grades of common mode sub-circuits
Specially common mode capacitance, wherein M is positive integer and M < N.
Preferably, the common mode capacity of the common mode capacitance is not less than 0.1 μ F.
Preferably, every grade of common mode sub-circuit is specially common mode inductance.
Preferably, the common mode sensibility reciprocal of the common mode inductance is not less than 50 μ h.
Preferably, which further includes：
It is sheathed in the direct current supply line, the magnet ring of common mode sensibility reciprocal for increasing the switching power circuit.
Preferably, which further includes：
It is wound according to identical coiling direction through the direct current supply line, the common mode sensibility reciprocal for increasing the switching power circuit
Magnet ring.
The present invention provides a kind of switching power circuits of inhibition EFT harassing and wrecking, including：Respectively with loop feedback and change
It the ON-OFF control circuit of depressor conversion circuit connection, the loop feedback that is connect with transformer conversion circuit and is sequentially connected in series
Current rectifying and wave filtering circuit, transformer conversion circuit, output rectifier and filter；For equipment power supply switching power circuit further include：
First input end is connect with firewire in power grid, the second input terminal is connect with zero curve in power grid, the first output end and rectifying and wave-filtering are electric
First common-mode circuit of the input positive terminal connection on road, the input negative terminal connection of second output terminal and current rectifying and wave filtering circuit；First is defeated
The output negative terminal for entering output plus terminal connection, the second input terminal and the output rectifier and filter of end and output rectifier and filter connects
Connect, the connection of the input positive terminal of the direct current supply line of the first output end and equipment, the input of second output terminal and direct current supply line it is negative
Hold the second common-mode circuit of connection；First common-mode circuit and the second common-mode circuit are used to inhibit the electricity in switching power circuit fast
Fast transient pulse train EFT harassing and wrecking.
As it can be seen that the input terminal of switching power circuit and output end are separately added into the first common-mode circuit and second total in the application
Moding circuit is used for that the EFT in switching power circuit is inhibited to harass, to the output voltage of stable switch power circuit, in turn
Maintain the normal work of equipment.
Description of the drawings
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to institute in the prior art and embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the present invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is a kind of structural schematic diagram of switching power circuit for inhibiting EFT to harass provided by the invention；
Fig. 2 is the structural schematic diagram of another switching power circuit for inhibiting EFT to harass provided by the invention；
Fig. 3 is the structural schematic diagram that a kind of magnet ring provided by the invention is sheathed on direct current supply line.
Specific implementation mode
Core of the invention is to provide a kind of switching power circuit of inhibition EFT harassing and wrecking, and input terminal and output end add respectively
Enter the first common-mode circuit and the second common-mode circuit, be used for that the EFT in switching power circuit is inhibited to harass, to stable switch electricity
The output voltage of source circuit, and then maintain the normal work of equipment.
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
The every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Fig. 1 is please referred to, Fig. 1 is a kind of structural schematic diagram of switching power circuit for inhibiting EFT to harass provided by the invention.
The switching power circuit includes：The switch control being connect respectively with loop feedback 1 and transformer conversion circuit 2
Circuit 3, the loop feedback 1 being connect with transformer conversion circuit 2 and the current rectifying and wave filtering circuit being sequentially connected in series 4, transformer turn
Change circuit 2, output rectifier and filter 5；For equipment power supply switching power circuit further include：
First input end is connect with firewire L in power grid, the second input terminal is connect with zero curve N in power grid, the first output end with
First common mode of the input positive terminal connection of current rectifying and wave filtering circuit 4, the input negative terminal connection of second output terminal and current rectifying and wave filtering circuit 4
Circuit 6；
First input end connect with the output plus terminal of output rectifier and filter 5, the second input terminal and output rectification filter
The output negative terminal connection of circuit 5, the input positive terminal connection of the direct current supply line of the first output end and equipment, second output terminal with it is straight
Flow the second common-mode circuit 7 of the input negative terminal connection of supply lines；
First common-mode circuit 6 and the second common-mode circuit 7 are used to inhibit the electrical fast transient burst in switching power circuit
Group's EFT harassing and wrecking.
Specifically, switching power circuit provided by the present application includes：First common-mode circuit 6, current rectifying and wave filtering circuit 4, transformation
Device conversion circuit 2, loop feedback 1, ON-OFF control circuit 3, output rectifier and filter 5 and the second common-mode circuit 7, work
Make principle：First common-mode circuit 6 is located at the ac input end of switching power circuit, for inhibiting the EFT in switching power circuit
The alternating current for being input to subsequent conditioning circuit is stablized in harassing and wrecking；The rectified 4 first rectification post filtering of filter circuit of alternating current after stabilization, it is whole
Stream is that alternating current is changed into direct current, and filtering is to filter out interference processing to the direct current of transformation, is input to subsequently with stablizing
The direct current of circuit；Stable DC carries out power conversion through transformer conversion circuit 2, in the process, transformer conversion
Direct current is changed into alternating current by circuit 2；3 co- controlling transformer conversion circuit 2 of loop feedback 1 and ON-OFF control circuit
Output voltage；The alternating current that transformer conversion circuit 2 exports first will through the first rectification post filtering of output rectifier and filter 5
Alternating current is changed into direct current, then filters out interference processing to the direct current of transformation；Second common-mode circuit 7 is located at switch power supply
The DC output end on road stablizes the direct current for being input to equipment for inhibiting the EFT in switching power circuit to harass, to steady
Determine the output voltage of switching power circuit, and then maintains the normal work of equipment.
More specifically, please referring to Fig. 2, Fig. 2 is another switching power circuit for inhibiting EFT harassing and wrecking provided by the invention
Structural schematic diagram.In Fig. 2, take a policy a F at firewire L, and the first common-mode circuit 6 and the second common-mode circuit 7 select common mode electric
Sense, for the particular circuit configurations of switching power circuit, the application is not particularly limited herein.
The present invention provides a kind of switching power circuits of inhibition EFT harassing and wrecking, including：Respectively with loop feedback and change
It the ON-OFF control circuit of depressor conversion circuit connection, the loop feedback that is connect with transformer conversion circuit and is sequentially connected in series
Current rectifying and wave filtering circuit, transformer conversion circuit, output rectifier and filter；For equipment power supply switching power circuit further include：
First input end is connect with firewire in power grid, the second input terminal is connect with zero curve in power grid, the first output end and rectifying and wave-filtering are electric
First common-mode circuit of the input positive terminal connection on road, the input negative terminal connection of second output terminal and current rectifying and wave filtering circuit；First is defeated
The output negative terminal for entering output plus terminal connection, the second input terminal and the output rectifier and filter of end and output rectifier and filter connects
Connect, the connection of the input positive terminal of the direct current supply line of the first output end and equipment, the input of second output terminal and direct current supply line it is negative
Hold the second common-mode circuit of connection；First common-mode circuit and the second common-mode circuit are used to inhibit the electricity in switching power circuit fast
Fast transient pulse train EFT harassing and wrecking.
As it can be seen that the input terminal of switching power circuit and output end are separately added into the first common-mode circuit and second total in the application
Moding circuit is used for that the EFT in switching power circuit is inhibited to harass, to the output voltage of stable switch power circuit, in turn
Maintain the normal work of equipment.
On the basis of the above embodiments：
As a kind of preferred embodiment, the first common-mode circuit 6 and the second common-mode circuit 7 include N grades of common mode sub-circuits,
Wherein, N is the integer more than 1.
Specifically, the first common-mode circuit 6 includes multistage common mode sub-circuit in the application, and multistage common mode sub-circuit is total with level-one
Mould circuit is compared, and can realize that input terminal continuous several times inhibit the EFT harassing and wrecking in switching power circuit, to which more stabilization is opened
The input voltage of powered-down source circuit；Similarly, the second common-mode circuit 7 includes multistage common mode sub-circuit, can realize that output end connects
The continuous EFT harassing and wrecking repeatedly inhibited in switching power circuit, so that the more output voltage of stable switch power circuit, ensure that and set
Standby normal work.
As a kind of preferred embodiment, M common mode sub-circuit is specially common mode inductance, N-M in N grades of common mode sub-circuits
Common mode sub-circuit is specially common mode capacitance, wherein M is positive integer and M < N.
Further, the application optional several common mode sub-circuits, these common mode sub-circuits from multistage common mode sub-circuit
Common mode inductance, four ports of common mode inductance is selected mutually to should be used as the first input end of common mode sub-circuit, the second input terminal,
One output end and second output terminal (i.e. several common mode inductances are sequentially connected in series)；Remaining several common mode sub-circuit selects common mode electric
Hold, in circuit, either end had not only been used as input terminal but also had been used as output end in the both ends of common mode capacitance, then the first end of common mode capacitance
As the first input end and the first output end of common mode sub-circuit, the second end of common mode capacitance is second defeated as common mode sub-circuit
Enter end and second output terminal (i.e. several common mode capacitances are in parallel successively).
As a kind of preferred embodiment, the common mode capacity of common mode capacitance is not less than 0.1 μ F.
Specifically, the common mode capacity of common mode capacitance is not less than 0.1 μ F (for example selecting 0.5 μ F, 1 μ F) in the application, inhibits
EFT harassing and wrecking effect is preferable, and as the specific choice of the common mode capacity of common mode capacitance, the application is not particularly limited herein.
As a kind of preferred embodiment, every grade of common mode sub-circuit is specially common mode inductance.
Further, it is contemplated that common mode capacitance can be limited by leakage current in circuit, and capacity is smaller, therefore EFT is harassed
Common mode inductance inhibition is relied primarily on, so every grade of common mode sub-circuit selects common mode electric in the multistage common mode sub-circuit of the application
Sense inhibits EFT harassing and wrecking effect more preferable.
As a kind of preferred embodiment, the common mode sensibility reciprocal of common mode inductance is not less than 50 μ h.
Specifically, the common mode sensibility reciprocal of common mode inductance is not less than 50 μ h (for example selecting 55 μ h, 60 μ h) in the application, inhibits
EFT harassing and wrecking effect is preferable, and as the specific choice of the common mode sensibility reciprocal of common mode inductance, the application is not particularly limited herein.
Fig. 3 is please referred to, Fig. 3 is the structural schematic diagram that a kind of magnet ring provided by the invention is sheathed on direct current supply line.
As a kind of preferred embodiment, which further includes：
It is sheathed in direct current supply line, the magnet ring M of common mode sensibility reciprocal for increasing the switching power circuit.
Further, it is contemplated that direct current supply line can be formed by a common mode choke across a magnet ring, so this
The switching power circuit of application further includes the magnet ring M being sheathed in direct current supply line, to increase being total to for the switching power circuit
Mould sensibility reciprocal, to enhance the inhibition harassed EFT.
As a kind of preferred embodiment, which further includes：
It is wound according to identical coiling direction through direct current supply line, the magnetic of common mode sensibility reciprocal for increasing the switching power circuit
Ring.
Alternatively, the switching power circuit of the application further includes the magnetic wound according to identical coiling direction through direct current supply line
Ring can equally increase the common mode sensibility reciprocal of the switching power circuit, and the number of turns wound is more, and increased common mode sensibility reciprocal is got over
It is more, inhibit EFT harassing and wrecking effect better.
It should also be noted that, in the present specification, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning
Covering non-exclusive inclusion, so that process, article or equipment including a series of elements are not only wanted including those
Element, but also include other elements that are not explicitly listed, or further include for this process, article or equipment institute it is intrinsic
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including institute
State in process, article or the equipment of element that there is also other identical elements.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest range caused.
Claims (8)
1. a kind of switching power circuit inhibiting EFT harassing and wrecking, which is characterized in that including：Respectively with loop feedback and transformation
The ON-OFF control circuit of device conversion circuit connection, the loop feedback that is connect with the transformer conversion circuit and successively
Concatenated current rectifying and wave filtering circuit, the transformer conversion circuit, output rectifier and filter；For the switch electricity of equipment power supply
Source circuit further includes：
First input end is connect with firewire in power grid, the second input terminal is connect with zero curve in the power grid, the first output end and institute
State the input positive terminal connection of current rectifying and wave filtering circuit, first that second output terminal is connect with the input negative terminal of the current rectifying and wave filtering circuit
Common-mode circuit；
First input end is connect with the output plus terminal of the output rectifier and filter, the second input terminal is filtered with the output rectification
The output negative terminal connection of wave circuit, the first output end are connect with the input positive terminal of the direct current supply line of the equipment, second exports
Hold the second common-mode circuit being connect with the input negative terminal of the direct current supply line；
First common-mode circuit and second common-mode circuit are used to inhibit the electricity quick wink in the switching power circuit
Become impulse train EFT harassing and wrecking.
2. inhibiting the switching power circuit of EFT harassing and wrecking as described in claim 1, which is characterized in that first common-mode circuit
And second common-mode circuit includes N grades of common mode sub-circuits, wherein N is the integer more than 1.
3. inhibiting the switching power circuit of EFT harassing and wrecking as claimed in claim 2, which is characterized in that the N grades of common mode sub-circuits
It is specially common mode capacitance that middle M common mode sub-circuit, which is specially common mode inductance, N-M common mode sub-circuit, wherein M is positive integer and M
< N.
4. inhibiting the switching power circuit of EFT harassing and wrecking as claimed in claim 3, which is characterized in that the common mode capacitance is total to
Mode volume is not less than 0.1 μ F.
5. inhibiting the switching power circuit of EFT harassing and wrecking as claimed in claim 2, which is characterized in that every grade of common mode electricity
Road is specially common mode inductance.
6. inhibiting the switching power circuit of EFT harassing and wrecking as claimed in claim 5, which is characterized in that the common mode inductance is total to
Mould sensibility reciprocal is not less than 50 μ h.
7. the switching power circuit as claimed in any one of claims 1 to 6 for inhibiting EFT harassing and wrecking, which is characterized in that switch electricity
Source circuit further includes：
It is sheathed in the direct current supply line, the magnet ring of common mode sensibility reciprocal for increasing the switching power circuit.
8. the switching power circuit as claimed in any one of claims 1 to 6 for inhibiting EFT harassing and wrecking, which is characterized in that switch electricity
Source circuit further includes：
It is wound according to identical coiling direction through the direct current supply line, the magnetic of common mode sensibility reciprocal for increasing the switching power circuit
Ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810609723.XA CN108712088A (en) | 2018-06-13 | 2018-06-13 | A kind of switching power circuit inhibiting EFT harassing and wrecking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810609723.XA CN108712088A (en) | 2018-06-13 | 2018-06-13 | A kind of switching power circuit inhibiting EFT harassing and wrecking |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108712088A true CN108712088A (en) | 2018-10-26 |
Family
ID=63872813
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810609723.XA Pending CN108712088A (en) | 2018-06-13 | 2018-06-13 | A kind of switching power circuit inhibiting EFT harassing and wrecking |
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| Country | Link |
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| CN (1) | CN108712088A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101079573A (en) * | 2007-06-29 | 2007-11-28 | 中兴通讯股份有限公司 | A power interface circuit |
| CN101404453A (en) * | 2008-10-31 | 2009-04-08 | 崧顺电子（深圳）有限公司 | Anti-interference switch stabilized voltage supply |
| CN203387400U (en) * | 2013-03-14 | 2014-01-08 | 孙明云 | Electrical rapid transient interference eliminator |
| CN203536955U (en) * | 2013-11-14 | 2014-04-09 | 航天长峰朝阳电源有限公司 | Multifunctional spike suppressor |
| GB2507776B (en) * | 2012-11-09 | 2014-12-10 | Kbo Dynamics Internat Ltd | Filter circuit |
| CN206250978U (en) * | 2016-12-13 | 2017-06-13 | 东莞市乐丰电器科技有限公司 | Switching Power Supply with input undervoltage protection |
-
2018
- 2018-06-13 CN CN201810609723.XA patent/CN108712088A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101079573A (en) * | 2007-06-29 | 2007-11-28 | 中兴通讯股份有限公司 | A power interface circuit |
| CN101404453A (en) * | 2008-10-31 | 2009-04-08 | 崧顺电子（深圳）有限公司 | Anti-interference switch stabilized voltage supply |
| GB2507776B (en) * | 2012-11-09 | 2014-12-10 | Kbo Dynamics Internat Ltd | Filter circuit |
| CN203387400U (en) * | 2013-03-14 | 2014-01-08 | 孙明云 | Electrical rapid transient interference eliminator |
| CN203536955U (en) * | 2013-11-14 | 2014-04-09 | 航天长峰朝阳电源有限公司 | Multifunctional spike suppressor |
| CN206250978U (en) * | 2016-12-13 | 2017-06-13 | 东莞市乐丰电器科技有限公司 | Switching Power Supply with input undervoltage protection |
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Application publication date: 20181026 |