VDD and VDDH out-of-spec consequences

RE: VDD and VDDH out-of-spec consequences

ketiljo — Tue, 17 Dec 2024 08:48:22 GMT

The LiPo battery should cut at 3.0 V, anything below this will damage the battery. So below VDDH below 2.5 V should never happen in your case, you need to prevent this by all means.

RE: VDD and VDDH out-of-spec consequences

Golaz — Fri, 13 Dec 2024 10:27:56 GMT

Also as a note. What we have observed in this scenario is that REG0 starts producing a very distorted output voltage on VDD. That is when radio starts transmitting the voltage dips for up to 200 mV from the baseline.

RE: VDD and VDDH out-of-spec consequences

Golaz — Fri, 13 Dec 2024 10:21:54 GMT

Thank you.
And what happens when VDDH falls below minimum limit of 2.5V ?

RE: VDD and VDDH out-of-spec consequences

ketiljo — Wed, 11 Dec 2024 13:16:12 GMT

When VDDH is lower than the configured VDD output voltage, the VDD output voltage will be lower than VDDH by a few 100 mV. So when the battery voltage is too low for the VDD level to be what you have set it to, it will still work all the way down to the minumum VDD level.