On Thu, Oct 31, 2019 at 01:15 AM, QRP RX wrote:
VBAT input of STM32F072 has 3.6 V maximum limit. At the same time Li-Ion cell
has 4.2 ¡À 0.05 V.
So, if you install diode with voltage drop smaller than 0.65 V you are at risk to burn out your STM32 ;)
STM32F072xB data sheet Table 21 Absolute Maximum Ratings
Vbat - Vss = 4.0 V Max
But it is so close to the wire I think I will change to a Silicon diode!
