我严格按照datasheet电路设计了3.3V->12v电路(附图1)。焊接完调试无法实现升压(附图2)。
输入3.45v(示波器量测)
输出3.23v(示波器量测)
FB引脚电压2.84V(不正常,手册是基准电压1.233v)
尝试:换过芯片;接了负载5.1k;使能EN为高;
请教什么原因呢?
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