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TPS61040: use the device in the 105°C ambient temperature

Part Number: TPS61040

Hi team,

My customer wants to try the TPS61040 and TLV61046 in the system. But the ambient temperature are -40℃ - 85℃, so the temperature in the system is 105°C. As you know, the TPS61040 can only survive the 85 °C ambient temperature. If we use the device in the 105°C, what's the risks? Thanks.

而TLV61046的参数如下 :

两款不同的芯片,参数结温TJ都是125℃,R θJA 也相差不多。

请帮忙分析,TPS61040在我们UIO项目,宽温的环境是否适合使用,有没有什么风险?还是我们在使用的时候保证TA+温升小于结温TJ就可以使用?

  • Hi Frank,

    normally the device can operate if the junction temperature is lower than 125oC. if the Ta=105, the output power should be small to make sure the junction is within 125oC

    but as the specification is in 85oC, some parameter may be out of spec. in 125oC condition.