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TPS40057 问题汇总 求助

Other Parts Discussed in Thread: CSD18504Q5A

在线设计的图8--36V   输出5.2v 15A

R7为49.9K   输出达不到5V    调整为82K    才可以输出

C33  C31  R30   为降低芯片功耗为焊接

高边MOS 焊接一个BSC027N04LS  VDS =40V  RDS=2.7 mΩ   ID=100A    低边mos焊接一个SI7884   VDS=40V  RDS=7.5mΩ  IA=58A

MOS发热厉害      效率低的一部分原因就是MOS损耗   怎样提高效率