LM3409。输入电压36v,输出33V,3A,控制信号变为低电平后,LED两端电压变化速度慢,大概需要20us才能完全熄灭,所以在10KHZ时,控制不好。如图所示
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LM3409。输入电压36v,输出33V,3A,控制信号变为低电平后,LED两端电压变化速度慢,大概需要20us才能完全熄灭,所以在10KHZ时,控制不好。如图所示