my customer discover some problem under 24 to 20V step down conversion
the load is 5A.
channel 1 is vout, channel 3 is SW,
you can see the PWM doesn't follow FCCM behavior,
May I know is this slope compensation problem or something else?
below is the schematic, they basically follow this file EPR_EVME3(001)_Sch_Dell.PDF
I try webench to emulate it but the phase margin looks fine, so weird...