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LM5122: 电子负载定电压模式下只输出电压,不输出电流

Part Number: LM5122

期望设计:电压输入15-48V;电压输出:60V;电流输出:1A(MAX)。

我将WEBENCH建议的Ruvb从5.11k改为4.3k后,电感不发出蜂鸣声,电压输出可达到60V。同时,

电子负载在定电阻60欧姆,定电流1A,定功率60W的情况下,板子都能输出:电压60V,电流1A。

可是在定电压60V模式下,板子只能输出60V电压,输出电流为0A。这是什么原因造成的呢?