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LM25116工作频率异常

Other Parts Discussed in Thread: LM25116

LM25116方案,设计输入电压21~30V,输出7V/4A,工作频率300K。当输入电压较低,逐步加载至重载时,工作频率跳变为150K,逐步回调至轻载工作频率恢复为300K;与输入电压相关,输入电压高时无此现象。