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ADN8833 and ADN8834 Thermal Shutdown

Thread Summary

The user inquired about the thermal shutdown behavior of ADN8833 and ADN8834. In thermal shutdown, the TEC+ and TEC- voltages are tied together, and TEC current drops to zero, similar to regular shutdown. However, the VREF circuit block remains active and maintains a 2.5V output to support other ICs sharing the reference.
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Please inform me about ADN8833 and ADN8834.

In Thermal Shutdown, if it's mentioned specifically, what output of IC stops?

Is the Thermal Shutdown function movement identical with the Shutdown function?

I read ADN8833 datasheet Rev. A | Page 14.

“ Most of the current is consumed by the VREF circuit block, which is always on even when the device is disabled or shut down. ”

In Thermal Shutdown, does a VREF circuit block maintain a controlled output?

Regards,

Thread Notes

  • Hi ytu

    Thank you very much.

    I'm thankful for your quick answer.

  • The thermal shutdown will trigger whenever the threshold temperature is exceeded; it doesn't matter what voltage/current level the IC is operating at that time. The shutdown behavior is the same as regular shut down: TEC+ and TEC- voltage will be tied together and TEC current will drop to zero. The Vref will still remain at 2.5V so that other ICs that share this reference can still operate.