Smart Module Series
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7.3. Charging Performance Specifications
Table 48: Charging Performance Specifications
I
VBAT
Peak supply
current (during
transmission slot)
Maximum power control level
at EGSM900.
-
1.8
3.0
A
USB_VBUS USB detection
4.35
5.0
6.3
V
VRTC
Power supply
voltage of the
backup battery
2.0
3.0
3.25
V
Parameter
Min.
Typ.
Max.
Unit
Trickle charging-A current
81
90
99
mA
Trickle charging-A threshold voltage range
(15.62 mV steps)
2.5
2.796
2.984
V
Trickle charging-B threshold voltage range
(18.75 mV steps)
3.0
3.2
3.581
V
Charge voltage range (25 mV steps)
4
4.2
4.775
V
Charge voltage accuracy
-
-
±2
%
Charge current range (90 mA steps)
90
-
1440
mA
Charge current accuracy
-
-
±10
%
Charge termination current:
when the charge current is from 90 mA to 450 mA
-
7
-
%
Charge termination current:
when charge current is from 450 mA to 1440 mA
-
7.4
-
%