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

Output voltage undershoot in flyback based power supply

Status
Not open for further replies.
L

Libin

Junior Member level 2
Junior Member level 2
Joined
Jul 30, 2008
Messages
21
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Location
Riyadh
Activity points
1,430
Hi Friends,
I made one flyback converter and observed voltage undershoot(negative spike) at 12Vdc output rail (12VDC voltage is dropping to 7V for small duration of 2 to 3 nanosecond) frequency of undershoot is same as switching frequency.
Give me some tips for eliminating voltage undershoot in flyback based power supply.

Best regards
Libin
 

Libin, could you show us the circuit?
A capacitor employed as a high frequency filter may be a solution, but it is hard to tell without seeing.
 
  • Like
Reactions: Libin

    L

    Libin

    Points: 2
    Helpful Answer Positive Rating
Could it be a measurement problem ? Such as noise pickup by the scope probe ?
 
  • Like
Reactions: Libin

    L

    Libin

    Points: 2
    Helpful Answer Positive Rating
Dear Vilela,

Thanks for your response, please refer the attached schematic.
regards
Libin
 

Attachments

  • NCP1216_undershoot.JPG
    NCP1216_undershoot.JPG
    57.8 KB · Views: 125

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top