Other Parts Discussed in Thread: TPS53679
Hi team,
I found the Vsw to Vgnd spike is larger than -7V. I added boot resister and snubber, but help little. The controller is TPS53679/659. Is there any resister to tune to reduce the spike?
Thanks.
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Hi team,
I found the Vsw to Vgnd spike is larger than -7V. I added boot resister and snubber, but help little. The controller is TPS53679/659. Is there any resister to tune to reduce the spike?
Thanks.
Hi Jerry,
What kind of probe did you use?Please use differential voltage probe to do the measurement, place the tips of probe as close as possible to power stage SW and PGND pins to minimize the effect of parasitic inductance. Sometimes the negative spike could be measurement issue caused by parasitic inductance.
Best,
Qingquan