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我想实现通过stm32管脚输出pwm信号来控制LM3409实现led调光。
问题是单片机的pwm输出信号直接连接LM3409还是通过光耦或者mos管。感觉直接和LM3409会对单片机串入干扰。
应该是不能直接接LM3409的，因为单片机的驱动电流就没那么大，输出电压也不够。
那LM3409上面EN脚也没有注明需要的驱动电流值呀，电压上面注明>1.76V为高电平
