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 (90m
A 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
