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求教:buck-boost电路输入电压被拉低
做了一个buck-boost电路,用单片机输出50k的PWM波加驱动芯片IR4427来控制mos管.稳压源输出12V,一接上电路后马上被拉到6V左右,而且Q1管(pmos)发烫,请问有人知道原因么?谢谢!
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