1. The LDO can be used in systems where only the high voltage power rail is available, hence no additional power supply rails need to be generated for the TPA3221 to operate. LDO可用于只有单一高压电源的系统，因此不需要为TPA3221生成额外的电源。2. can be used to supply the gate drive by supplying the GVDD from AVDD through a RC filter for best noise performance as shown in Figure 28可通过RC滤波器从AVDD连接至GVDD来提供栅极驱动，以获得最佳噪声性能，如图28所示也就是说，它通过GVDD向栅极驱动电路提供电压。它不提供栅极驱动信号。
