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hello,
we designed 12V buck Convertor based on LM5146.
After Connecting Inductor (Pi filter C_L_C)input side of chip i am getting Oscillation of input voltage.
After removing inductor circuit operate normally.
I am doing simulation on Cadence Orcad Capture.
please suggest solution.
Hi,
Please add Damping capacitor. See 4.4 of http://www.ti.com/lit/an/snva489c/snva489c.pdf for parameters.
You can ref http://www.ti.com/lit/an/slua929a/slua929a.pdf for root cause.