User's Manual

SC20-A_Manual_R1.0 Confidential / Released 24 / 49
Parameter Description Conditions Min. Typ. Max. Unit
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
7.3. Charging Performance Specifications
Table 16: Charging Performance Specifications
Parameter Min. Typ. Max. Unit
Trickle charging current 81 90 99 mA
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 90 to 450mA;
7 %
Charge termination current: when charge
current is from 450 to 1440mA;
7.4 %
7.4. Operating Temperature
The operating temperature is listed in the following table.
Table 17: Operating Temperature
Parameter Min. Typ. Max. Unit
Operating temperature range
1)
-35 +25 +65 ºC
Extended temperature range
2)
-40 +75 ºC
Trickle charging threshold voltage range
(15.62mV steps)
2.5 2.796 2.984 V
Weak battery threshold voltage range
(18.75mV steps)
3.0 3.2 3.581 V