WL1831MOD: Interpreting Temperature Ratings and High Temp Control Mechanism

Matt Calvo

Part Number: WL1831MOD

Hey Wi-Fi team,

I have a customer working with the WL1831MOD on a project and during testing the device temp was slightly over 78 degC. Taking into account the device datasheet we have a few questions:

According to the Absolute Max Ratings table, the Max ambient temp supported is 70C. Are there any concerns with measuring a device temp of ~78C?
In the footnote of the AMR table, it mentions a control mechanism is in place to manage the transmitter patterns and ensure the junction temp remains less than 125C. What is the impact of this control mechanism from a performance and functional perspective?
How does time come into play on these temperature specs? Are there longevity or reliability issues when operating the device with Tj near 125C?

Any guidance you can provide here would be greatly appreciated!

Best regards,

Matt Calvo

over 2 years ago

0 Dylan Hubbard over 2 years ago

TI__Mastermind 45145 points

Hi Matt,

Please refer to this post for some details on the control mechanism https://e2e.ti.com/support/wireless-connectivity/wi-fi-group/wifi/f/wi-fi-forum/433922/wl1831mod-junction-te. I'm not greatly concerned about the 78 C being measured, but having the junction temp being close to the max value can impact reliability of the device.

This app note covers reliability metrics of WL18xx modules, it should have additional details that can be useful.

0 Matt Calvo over 2 years ago in reply to Dylan Hubbard

TI__Genius 14655 points

Thanks for the feedback and for sharing those resources Dylan! :)

I'll go ahead and pass this info along to the customer and will have them comment back on this thread with any follow-up question they may have.

Best regards,

Matt Calvo

0 Dylan Hubbard over 2 years ago in reply to Matt Calvo

TI__Mastermind 45145 points

Hey Matt,

Sounds good, Ill wait for their response.

Wi-Fi

Wi-Fi forum

WL1831MOD: Interpreting Temperature Ratings and High Temp Control Mechanism