Hi Sir,
Our customer response the TPS51120 have PWM Double pluse issue as below,
We have cut-output not loading affect, we have try to short COMP2 to VFB2 not improve.
How can we improve this problem?
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Hi,
some input for reference.
1, Check C16 spec whether can meet formula 19 in datasheet.
2, if item1 is ok, parallel a 20pf cap with R9 to try.
3, after 1 and 2, the issue still happen, let's review layout.
And by the way, check this happen only at light loading or both light loading and heavy loading..
Yuchang
Hugo,
I remembered I answered this question, but seems I failed to submit.
Generally suggest this cap not over 100pf.
Yuchang