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BQ24640设计问题

Other Parts Discussed in Thread: BQ24640, CSD18563Q5A, BQ24640EVM

用BQ24640芯片设计的给超级电容充电,充电电流大概为3A,不算大,但mos管(csd18563q5a)会发热,虽然不是很热,但我还是觉得不正常,因为电流并不是很大,怀疑是自己的PCB设计有问题,希望大佬们指点一下!