Product Info

Smart Module Series
SC20_Series_Hardware_Design 90 / 133
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 - %