On Fri, Nov 1, 2019 at 01:53 PM, Nick wrote:
On Fri, Nov 1, 2019 at 05:13 PM, Nick wrote:
Perhaps if VBATEN was set all the time in the firmware a single 16k resistor
at VBAT input (instead of D2) might suffice.
Scrub that. The bridge isn't enabled when the device is switched off because
the firmware is not running.
We don't really need a lot of precision, do we? How about a simple resistor network? Max VBAT ~3.6V with no bridge, 3.15V with bridge, linear response w slope ~= 0.75, 36 uA with no bridge > a long time to drain 450 mAh batt...
--
On the banks of the Piscataqua
Rich NE1EE
Rich NE1EE
