I'm using ADN8831 tec controller.
The temperature control seems very well, but I have what I cannot understand about the chip signals.
I measured the VTEC at the pin30 as 2.10V. I measured the voltage between LFB and SFB as well and the LFB-SFB was 4.04V.
The VTEC value 2.10V meant LFB-SFB=3.40V.
Does anyone know the reason why the voltages were different?
When the VTEC was lower than 1.25(LFB-SFB<0), the voltage values were almost same.