MAX1574用一个外部电阻设置满量程(100%) LED电流。使能输入(EN)可用作简单的开/关控制或利用重复脉冲设置更低的LED电流,最低可降至5%。一旦建立了所需要的亮度,只要EN保持高电平,MAX1574即可保持恒定的LED电流。如果EN保持低电平的时间超过2ms,MAX1574将进入关断模式。MAX1574采用10引脚3mm x 3mm TDFN封装(0.8mm最大高度)。
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