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LM5117工作不正常

Other Parts Discussed in Thread: LM5117

按照5117手册上28页的图焊接的图~ 接5欧的负载,输出电流只有零点零几安,电压只有零点几伏。lm5117工作不正常~测得的HO脚的输出波形,峰值达到40v。

下图是放大之后看的波形细节:

还有RT脚,LO脚,CS脚 都是这种类似的断断续续的波形~

电路图: