Nordic nRF52840 Thermal Characteristics

[Engineer]

Hi Nordic,

I’m H/W engineer, dedicated in development of radio circuit. I ask the question because we’d like propose your Nordice nRF52840 to our customer when replying the request of a BLE radio. So far we check the solution with the capability, much higher transmitting power than our usual solution, so it looks good but we found it better to estimate the generate heat and associated thermal effect soon because of that also. – That means we’d better starting the thermal works to prevent it becoming a matter with violation of thermal

Unfortunately, we can’t find the appropriate information (thermal resistance, maximum junction temperature). Could you let us have these information soon not mentioned to help of circuit integration happened to an AP. It’s looked forward to getting your feedback soon

[AmbystomaLabs]

I have never seen Nordic provide theta JC, JA, etc. data for the nRF products. They draw such low current that the junction temp rise relative to ambient will be rather small under any condition. You should be able to just follow their ambient temp guidelines in the product spec and not be concerned with the junction temp.

However, if you wish to be more thorough you can easily write some custom code to exercise the nRF per your products requirements and just measure the core temp using built in temp sensor and that will give you theta J-A.

See this answer where Nordic discusses this solution: devzone.nordicsemi.com/.../

[Engineer]

It's a great reference for the earlier nRF51 series. Thanks.