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TPS40170烧芯片

Other Parts Discussed in Thread: TPS40170

我正在使用TPS40170,输入24V交流,经整流后电压约为33V直流,设计输出24V,20A。 不加负载时输出24V,加了一个继电器作为负载(约为0.1A),继电器吸合很短时间芯片就烧了,确认发现14脚和地短路,已经烧了好几个芯片了。请问是什么原因?

24V output.pdf