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TAS6424E-Q1: TAS6424的THD+N测试

Part Number: TAS6424E-Q1

使用TI的TAS6424E的EVM板进行THD+N的频率扫描测试,发现如下特征:

输入电压18V/Gain设定 21V/输出功率为15W和20W。THD+N的频率扫描曲线好。

输入电压24V/Gain设定21V/输出功率为15W和20W。THD+N的频率扫描曲线差。

无法理解其中的缘由,请教一下TI,这个是什么原因?image.png