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1、加PWM调光时，输出电流与设定的值不一样，请帮忙分析原因
2、加PWM调光时，在PWM脚上升沿开始之后主MOS管的驱动波形的第一个脉宽时间与设定的频率不一样，是IC本身决定，还是参数设置原因，请告知！
