目前使用UCC2897A芯片实现48V输入,54V@3A输出,硬件打板回来上电后输出仅为3V左右,测量芯片FB引脚电压在5.3V左右,而OUT引脚的输出占空比极小,附件是原理图,请帮忙看下问题是什么?
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您好
https://www.ti.com.cn/tool/cn/download/SLUC662
这是官方辅助计算工具来帮助检查一下相关参数
https://www.ti.com.cn/cn/lit/zip/slum429
您可以通过仿真软件进行理论上验证。