想用LM5073做,前端既有POE供电,又有直流24V供电,24V直流为主电源,POE为备电源。后端通过24-5V DC-DC,有没好的解决方案?另外LM5073的FAUX可以用来接24V电源嘛,非常感谢!!
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Limin,
LM5073的FAUX可以用来接24V电源的问题:答案:可以的,请参考LM5073EVM的参考设计:
www.ti.com/.../litabsmultiplefilelist.tsp
但更好的选择,如JW所说,使用APD PIN引脚来控制。详细请参考以下的使用笔记: