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LM1876 非隔离封装 散热片为什么为负电压

Other Parts Discussed in Thread: LM1876

大家好,

             我们在使用LM1876封装的时候发现散热片与Vee管脚电压相同,由于没有注意,外部散热片经常与地碰到一起 ,导致Vee与GND连到了一起,烧坏了还几块芯片,不太明白为什么会将散热部分与Vee连接到一起?