求助! 简易锂电池平衡充电器电源IC代换

该充电器电源损坏后检修发现保险管烧悔,检测发现场效应管正常,断开电源IC供电脚后,更换保险管后才不烧毁,如果接通电源IC的供电脚,保险丝通电立即烧毁,推断应该是该 双列直插的IC损坏,但该IC上的型号等已经全部被打磨过了,看不到任何型号,请高手帮忙分析一下电路,找出代用品,感谢!!
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