Hello team,
I am planning to use MPQ45558 in my design for 24V applications which switching at 2MHZ .
I wanted to design a Pi filter for it ,what is the cutt of frequency I have to consider while desiging the pi filter for front end.
I am targeting CISPAR25 standard
Hello,
The cutoff frequency would be where the Gain crosses 0dB. Typically, it is reccomended to start with a cutoff frequency around 1/10 of the switching frequenct.
I have provided waveforms obtained from the DC-DC Designer tool as a base to start your design. Note: DC-DC designer is a general tool, and additional tuning will most likely be needed.
Power Stage Bode Plot: F_Cutoff = 40kHz
Loop Gain Bode Plot: F_Cutoff =80 kHz
Hope this helps!