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lm3421大功率应用的限制

Other Parts Discussed in Thread: LM3421

输入dc22-25V,输出7A 35Vled驱动,用lm3421.用ti的软件,会出现iSW超出范围的1个限制,实际搭电路,也是实现不了的,看手册,没发现有10A功率管电流限制,其IS端为245mv限制,那么10A的限制从哪来的?