Product Info

Smart LTE Module Series
SC20 Hardware Design
SC20_Hardware_Design 87 / 130
7.3. Charging Performance Specifications
Table 43: 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 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
(15.62mV steps)
2.5
2.796
2.984
V
Trickle charging-B threshold voltage range
(18.75mV steps)
3.0
3.2
3.581
V
Charge voltage range (25mV steps)
4
4.2
4.775
V
Charge voltage accuracy
+/-2
%
Charge current range (90mA steps)
90
1440
mA
Charge current accuracy
+/-10
%
Charge termination current:
when charge current is from 90mA to 450mA
7
%
Charge termination current:
when charge current is from 450mA to 1440mA
7.4
%