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LM2743的Isen管脚不接不接电阻是不是就不限流了?

Other Parts Discussed in Thread: LM2743

如题,我在使用LM2743时,看官方手册上说这个管脚要接限流电阻,但是实际使用中我发现这个管脚不接电阻电路也能正常工作,至于还能不能限流我就不知道了,所以开贴询问一下。