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TPA3144D2: Question about maximum rating spec

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Part Number: TPA3144D2

Please let me know about three points below for TPA3144D2 maximum rating.

①Datasheet page 5 is not described maximum rating of GVDD (Blank).

 Is there test data for GVDD maximum rating?

 Or, I guess that GVDD rating is 20V because GVDD pin is nearly AVCC LDO by datasheet Page 12 circuit, is it correct? 

②What is "minimum load resistance: RL" mean?

 Is RL rating depend on maximum output power or current?

 If there any other factor, please let me know.

③Is there the other spec for internal FET?

 Is FET important point only PVDD and thermal loss?

Best regards,