PCM1789: Application Inquiry

Renan Santos Adriano

Mastermind 19165 points

Part Number: PCM1789

Hello Team,

My customer wanted to know the maximum junction temperature ( not ambient, but junction) where the device (PCM1789PW) can fully operate? The datasheet shows that the 150C absolute max junction temperature for stress screening only and functionality is not implied.

Regards,

Renan

over 2 years ago

0 Arash Loloee over 2 years ago

TI__Mastermind 23920 points

Hello Renan,

Let me check on this and see if I can find any information. I will be out of office the rest of week but will be let you know by early next week.

Regards,

Arash

0 Arash Loloee over 2 years ago in reply to Arash Loloee

TI__Mastermind 23920 points

Hello Renan,

We do all our products testing and char with operating ambient temperature . So I could not find an official number for junction temp as it is not directly mentioned in DS. However I think you can get a rough estimate for max junction temp by calculate the difference b/w junction and ambient temperature (Delta T) using the following equation:

delta_T= Power x (Junction-to-ambient thermal resistance +Junction-to-case thermal resistance)

There is also this link that can read more on how to calculated the Junction temp:

https://learn.sparkfun.com/tutorials/understanding-thermal-resistance/all

Hope this help your customer.

Regards,

Arash

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PCM1789: Application Inquiry