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LED芯片LM3401出现闪烁问题,频率大概四秒一次,

Other Parts Discussed in Thread: LM3401

版主你好,我用TI的在线设计软件设计了一款大功率LED的驱动器,但是出现了一个问题,就是输出的电流最大只能达到400ma.,空载电压就是输入电压,在运行过程中,芯片发烫特别厉害,旁边的松香都被烫冒烟了,然后再运行过程中运行四秒,停止四秒,不知道什么原因。麻烦你给解答一下,LED是四个1.4V、1.2A的LED串联的