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蓝牙便携小音箱功放IC选择的疑惑?

Other Parts Discussed in Thread: LM48511, TPA2013D1, TPA2012D2, TPA2016D2

一款蓝牙便携小音箱,内置3.7V聚合锂电池,用一对40MM(1.5寸)4 Ω、2W 喇叭 ,在选择德州仪器(TI)D类功放IC时有点疑惑。如带动二个 4 Ω、2W 喇叭 最大音量输出时,THD+N 能够保持在%1以内,或者更小的失真以达高品质音的需求。

PS:

1、还要考虑上蓝牙的高电平干扰?

2、 如需5V电压,是否有成熟的外围3.7升5V的升压电路和稳压电路可参考选用?