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TPA3138D2: TPA3138 work with DC boost to provide VDD dynamic voltage

Part Number: TPA3138D2

Hi Team:

can you help to verify the following questions from customer side:

1: if the parallel speaker 3W and 12W can be connect together under TPA3138 PBTL Mode?

2: if TPA3138 can work with DC boost to provide its' VDD dynamic voltage, thus to save the power , you know this is a typical application for TAS582X solution,  thanks!