现在设计一个LED驱动电路,输入6-12V,输出电压3.3V 输出电流3.5A。
输入12V的时候,测量出来电流为3.5A左右。电源切换到6V,电流就变成3.2A左右。可能是哪里的原因导致的呢?
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HI
确认一下layout, 特别是sense电路,不同输入电压下,导致不同的峰值电流,在layout寄生参数上的影响不同,会导致LED电流的差异。