TPS65982: TPS65982 source bulk capacitance

Hello,

The bulk capacitance is to help with a slower discharge during a power role swap. The capacitance also helps with ensuring a slower ramp up when going to a higher voltage PD contract. There is no maximum specification for this value as more capacitance here is usually considered better.

In PD 3.0 spec, this Source Cap is more important due to the introduction of Fast Role Swap. The Bulk Capacitance is there to hold the voltage momentarily during the FRS event to ensure that VBUS does not fall too fast for the power roles to swap.
For most implementations, 150uF is more than enough capacitance.

Thank you,
Eric