tpa3255evm板上pffb元件预留位置不全,预留了r_fb,但c_fb_in、c_fb_out、r_fb_gnd却未留,TPA324X AND TPA325X POST-FILTER FEEDBACK文档中,推荐元件表中c_fb_in、c_fb_out、r_fb_gnd显示N/A。请问测试pffb时,c_fb_in、c_fb_out、r_fb_gnd是不需要,还是另外加?
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tpa3255evm板上pffb元件预留位置不全,预留了r_fb,但c_fb_in、c_fb_out、r_fb_gnd却未留,TPA324X AND TPA325X POST-FILTER FEEDBACK文档中,推荐元件表中c_fb_in、c_fb_out、r_fb_gnd显示N/A。请问测试pffb时,c_fb_in、c_fb_out、r_fb_gnd是不需要,还是另外加?
您好,
PFFB旨在芯片外部输入(Inx )和输出(Out x) 间再增加一条反馈回路,与喇叭的输出配置模式没关系。
芯片内部的反馈请参考数据手册“8.2 Functional Block Diagrams”。