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求助 TPS40057 自身功耗太大 发热 问题

Other Parts Discussed in Thread: TPS40057, CSD18537NQ5A

用TPS40057 在线设计了 输入8-36V   输出5.2V /15A        

测试结果是自身损耗太大, 不带负载情况下,输入电流130MA    ,发热厉害!

请大师帮解决下