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DP83TC811EVM板子供电输出的电流过大,板子表面发烫,请帮忙核实是否产品性能不良

板子供电输出的电流过大,板子表面发烫,请帮忙核实是否产品性能不良
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Annie Liu:

请问是否ti.com上购买的板子?如果是,请提供订单号,谢谢

,

Kailyn Chen:

您好, 视频中的5V供电,是给哪里供电? DP83TC811的VDDA以及AVD都不能接受5V供电呢。

,

user5958013:

供电是给LDO芯片供电   又不是直接供电给以太网物理芯片这个电源接插件

,

Kailyn Chen:

您好,板子是在ti estore上购买的吗?

,

user5958013:

是哦

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Kailyn Chen:

您好,抱歉回复晚了, 板子上的LDO是TPS73733,我看了下它是一款最大1A输出的LDO.但是电流大小是由负载决定的,TPS73733这款内部有过流保护电路,过流的阈值是1.6A。 EVM板是否能正常工作呢?

,

user5958013:

能正常工作,就是发热,温度高

,

Kailyn Chen:

您好,抱歉回复晚了, 如果进一步确认芯片温升是否正常,可以通过热阻和功率计算一下芯片结温,然后和实际测试的温度是否相符.

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