Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

Can a saturated EMI core damaged a MOSFET switch?

Status
Not open for further replies.
D

dann11

Full Member level 3
Full Member level 3
Joined
Oct 22, 2015
Messages
166
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,296
Activity points
2,742
Hi! Can a saturated Common Mode choke can damaged a MOSFET switch?
 

you mean in an SMPS?
i doubt it, very much doubt it
Also, common mode chokes rarely saturate as common mode current in them is very small usually....unless the turns are not equal
 
  • Like
Reactions: dann11

    D

    dann11

    Points: 2
    Helpful Answer Positive Rating
In context to damage of SMPS I have some bad experience of input rectifier and emi circuit malfunction. I'm still not clear why it happened as it happened many times even after this post https://www.edaboard.com/threads/235071/
I perceive that the fault was due to reaction of reactive circuitry of emi & filter capacitors and common mode choke. However I will try again without including emi circuitry for next design to check if it was the culprit as it matters much from design point of view!
 
  • Like
Reactions: dann11

    D

    dann11

    Points: 2
    Helpful Answer Positive Rating
yes switching on at mains peak, when no pfc bypass diode, or no big cap following rectifier, can result in overvoltage ringing of emc filter....best is to put some damping in and make everything sized high enough in volts to stay out of trouble.
 
  • Like
Reactions: dann11

    D

    dann11

    Points: 2
    Helpful Answer Positive Rating
without proper inrush limiting the fuse will eventually blow...
 
  • Like
Reactions: dann11

    D

    dann11

    Points: 2
    Helpful Answer Positive Rating
without proper inrush limiting the fuse will eventually blow...
Click to expand...
Even of the fuse datasheet says its "rated" to not blow with such a current surge?
Just asking because i previously suspected nuisance tripping due to fuse wear but the manufacturer told me it "never happens".
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top