hossein_atp
Newbie level 2
Hello Friends
I have used LM2575 as my power supply for 3.3v and I have added Ferrite beads of MURATA (BLM18PG300SN1) in my board for noise suppression.
Approximately 80pcs of ferrite beads are used the board and I put one 100nf capacitor after each ferrite bead , each pair of ferrite bead and capacitor is put for one IC .
My problem is resonance of these ferrite beads , When I remove the ferrite beads there is no resonace but when they are,I have 100mv peak-to-peak resonance on my supply 3.3v.
How can I remove these ripples? or it is normal?
I have used LM2575 as my power supply for 3.3v and I have added Ferrite beads of MURATA (BLM18PG300SN1) in my board for noise suppression.
Approximately 80pcs of ferrite beads are used the board and I put one 100nf capacitor after each ferrite bead , each pair of ferrite bead and capacitor is put for one IC .
My problem is resonance of these ferrite beads , When I remove the ferrite beads there is no resonace but when they are,I have 100mv peak-to-peak resonance on my supply 3.3v.
How can I remove these ripples? or it is normal?