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TPS552882: TPS552882RPMR在调试过程中发现输出电流只能达到3.3A左右就起保护,与参考原理图的5A或更高电流不符

Part Number: TPS552882


TPS552882RPMR在调试过程中发现输出电流只能达到3.3A左右就起保护,与参考原理图的5A或更高电流不符。这个是设计参数不对还是设计原理有问题?我需要怎么提高负载输出能力?

输入电压:10-20V(实际调试过程一直恒定稳压电源电压为14.8V)还有一种情况输入电压需要调至19V(适配器)目前这一步还没验证

输出电压:12V  6A

https://webench.ti.com/power-designer/switching-regulator/customize/2 也试过在webench上进行设计 然后调整了相关参数 依然没效果

附件为TPS552882RPMR设计原理图部分

111112.pdf