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LM5060短路保护问题

Other Parts Discussed in Thread: LM5060

在使用LM5060的时候,过压(36V)和欠压(19V)都调试OK,RS=1K,RO=0R,MOSFET Rds=3.0mΩ 电流设定为大约5A, 这部分也OK。

但输出短路时,示波器测量TIMER脚(0.1uF)峰值为1.5V,达不到2V,LM5060不会关闭MOSFET,MOSFET反复开关导致发热烫手。

求此问题的原因和解决方法。