User Manual

Bluetooth Audio Module BTM-68D
Shenzhen TTK Technology CO.,LTD
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7.15
Trickle charge voltage threshold
--
2.9
--
V
Float voltage (with correct trim value set), VFLOAT (f)
4.10 4.15 4.2 V
Float voltage trim step size(f)
--
50
--
mV
Battery charge termination current, % of fast
charge current
5
10 20
%
(a) Current into VDD_CHG does not include current delivered to battery (IVDD_CHG - IBAT_P)
(b) BAT_P < trickle charge voltage threshold
(c) Charge current can be set in 16 equally spaced steps
(d) Trickle charge threshold < BAT_P < Float voltage
(e) Where headroom = VDD_CHG - BAT_P
(f) Float voltage can be adjusted in 15 steps. Trim setting is determined in production test and must be loaded into the battery charger by
firmware during boot-up sequence
Table 2: Battery charger characteristics
Reset
Min Typ Max Unit
VTH,res threshold voltage
0.65 0.85 1.50 V
RIRES input resistance
--
220
--
KΩ
CIRES input capacitance
--
220
--
nF
Table 3: Reset terminal characteristics