电源模块PT78NR112SPT78NR115S¥1490去看看国成芯泰电子发布了PT78NR115S PT78NR112S TI电源模块PT78NR115SPT78NR152HPT78NR206SMIC4451YN¥150去看看能良科技发布了MIC4451YM MIC4451YN PT78NR206S PT78NR152H PT78NR115S