DRV8840在OUT1,OUT2输出并接104电容,驱动频率25KHz,占空比80%,电路1A左右,芯片发热异常,是什么原因?占空比100%情况下不发热。
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您好,
请问电源电压是多少?我们假设104 = 0.1uF 值。
如果拿掉这些电容器,我们假设发热问题可以解决吗?
I = C * dV/DT -这将是输出方波的每个上升沿上的浪涌电流,可能将会导致过热。