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LM5170: LM5170 ISET 可以控制输出电压从0到5v 吗?

Part Number: LM5170


采用5170 设计一个开发板,

 参考TI  线路, 输出电压可以调节左右12V。但是在调节ISET 100mv,50mv ,输出3.8v就不能控制了, 电压跳动很厉害。

大家有什么指导方法吗?