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TPS65218D0的DCDC1~4,当负载电流为多少以下时,会进入到PFM模式?



当负载为0.6A的情况下,算是轻载吗?
另外,DCDC1,DCDC2的负载是0.6A,开关频率超过了2400kHz±12%的范围(可能这个范围是典型值)。
而DCDC3和DCDC4的负载分别是0.662A和0.642A,其开关频率却没有超出2400kHz±12%的范围,原因是什么呢?
DCDC1~4,判定轻载的电流界限值分别是多大呢?