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LM3409 PWM调光问题

Other Parts Discussed in Thread: LM3409, LM3414

在PWM信号脉宽自动调整时(PWM脉宽由0%-100%-0%循环,变化比例为1%,周期时间为5S),脉宽大概在0%-30%或30%-0%时(输出平均电流较低时),灯出现阶梯闪烁,如果暂停PWM脉宽,灯不会闪。此现象能不能解决?