您好、先生、
我可以在 FB/EN 引脚中使用0201 (1/20W)电阻器吗? 它仅看起来电流很小、只需再次检查即可。
谢谢、Ian。
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尊敬的 Ian:
最差条件:VIN、MAX = 14.5V、IOUT、MAX = 2A
占空比:
D = VOUT /(VIN、MAX * eff)= 0.38
峰值电感器电流:
IL、MAX = IOUT、MAX +(VIN、MAX - VOUT)* D /(2 * FS * L)= 2.5A
增加20%余量、所需的电感器饱和电流为3A
有关计算的更多信息、请参阅:
http://www.ti.com/lit/pdf/slva535
此致、
密耳