Hi motor drivers team,
My customer is experiencing buck supply output oscillation above 38V input voltage. Information I have received so far:
- 140mVpp oscillation experienced with original 47uF output electrolytic capacitor
- 52mVpp oscillation experienced when changed to 47uF ceramic capacitor
- Removing C15 compensation capacitor made the oscillation worse
Below 38V input, the output is absolutely smooth. Customer is trying to achieve 50V+ at the input
Can you suggest how to eliminate this oscillation?
Thanks,
Sean