Bringup: Power #1

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markus · 2022-10-17T18:21:52+02:00

markus commented

2022-10-17 18:21:52 +02:00

Replaced boost converter feedback resistors with 20k/7.5k due to availability constraints.

CPU 3.3V: Spot on
Boost LED power supply: 4.6V (tested up to 150 mA -> 88% eff.)
Charger: Seems alright, CHG_ACTIVEn seemed to not properly pull to 0, but that might be due to lack of a proper cell
LED string

Note: Verify configured 250 mA charge current against to be selected cell.

Replaced boost converter feedback resistors with 20k/7.5k due to availability constraints. - [x] CPU 3.3V: Spot on - [x] Boost LED power supply: 4.6V (tested up to 150 mA -> 88% eff.) - [x] Charger: Seems alright, CHG_ACTIVEn seemed to not properly pull to 0, but that might be due to lack of a proper cell - [x] LED string Note: Verify configured 250 mA charge current against to be selected cell.

markus commented

2024-03-10 17:07:49 +01:00

Changed charge rate to 200 mA for the 400 mAh LiPo battery.
Problem: As the CPU runs off the cell (and therefore charger) supply, it never detects that it finished charging unless the CPU is suspended. See digital bringup for more details.

* Changed charge rate to 200 mA for the 400 mAh LiPo battery. * Problem: As the CPU runs off the cell (and therefore charger) supply, it never detects that it finished charging unless the CPU is suspended. See digital bringup for more details.

markus closed this issue

2024-03-10 17:10:12 +01:00

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Reference: markus/leddie#1