TPS53353 datasheet is described that Boot capacitor(R9) recommend is 2Ω.
①If noise and ringing condition is good, is Boot capacitor set to 0Ω, no problem?
※One customer waveform is attached below, large Boot cap will be drop VBST(with respect to LL).
When change to less than 2.4Ω, VBST voltage was not drop.
Customer want to confirm OK or NG for 0Ω condition. (When NG, what is the minimum value?)
・22Ω
・5.6Ω
・2.4Ω
・0Ω
②Additional question, datasheet P27 is described "Use separated vias or trace to connect LL node to snubber, boot strap capacitor and ripple injection resistor. Do not combine these connections."
When combine snubber and ripple injection resistor, is there possibility for above VBST voltage drop?
Please let me know about how influence the combine these circuit.
Best regards,
Satoshi