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有关lme49830驱动2欧姆负载的问题



TI的工程师您好!本人按照贵司的LME49830的参考电路做了一台功放,电源电压+-50V,输出级是2并管,NMOS为飞兆的FQA44N10,PMOS为IR的IRF5210,MOS管驱动电阻为47欧姆,加载4欧姆时可以扫到10%THD+N为210W,在加载2欧姆扫功率曲线时大概扫到80W左右就烧了NMOS,麻烦能帮忙分析一下原因,谢谢!