User's Guide

ATOP3.5G Product Description
80447ST10636A rev.10 – 2015-03-03
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Reserved. Page 39 of 66
Mod. 0808 2011-07 Rev.2
13.5 Battery charging
Table 22 Battery charging
Handled by integrated battery charging unit. Parameters mentioned in this table are indicative and taken from supplier data
sheets.
Symbol Parameter Conditions Min Typ Max Unit
V
DD(chg)
charger supply voltage - - 5 V
T
en(ch)
charge enable
temperature
charger only enabled within this window 0 - 40 deg
V
ch(trickle)
trickle charge voltage battery level at which fast charge mode starts - [1] - V
I
ch(trickle)
trickle charge current 10 [1] 160 mA
V
ch(fast)
fast charge voltage constant voltage phase - [1] - V
I
ch(fast)
fast charge current constant current phase
I
EOC
[1] 1000 mA
I
eoc
end of charge current auto charge ends when battery current
reaches this level
- [1] I
ch(fast)
mA
V
th(ch)
charge threshold voltage auto charge resumes when battery level drops
below this level
- [1] - V
[1] Settings are software programmable, depending on battery technology (LiIon, LiFePO4…) and need to be set
accordingly.