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UCC25600过流保护问题

Other Parts Discussed in Thread: UCC25600

用UCC25600时,过流保护没有触发,测量发现OC脚的电压大于1V以后,输出电压拉低,工作频率由90k跳变到130K,这时OC脚的电压小于1V,一直保持输出