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我用TPS23753APW设计了一个POE电源，按5V/2A推荐设计，问为什么反馈电阻R19与R24为什么比例为3:1，TL431的基准为2.5V，这样输出会变成10V，于是我调节电阻比例为1:1，输出变为5 V，再加2A左右负载时，Q2开关管FDS2582烧坏了，谁能给解决下？
亲；TL431有高压和低压两个版本；分别对应2.5V和1.25V基准。关于TL431详情；请参阅数据表。
