Datasheet

C
TTC
+
t
CHARGE
K
TTC
C
TTC
+
300 m
2.6 mńnF
C
TTC
+ 115.4 nF
103AT
RT1
RT2
VTSB
TS
RTH
RT2=
V RTH RTH
O(VTSB) COLD HOT
´ ´ ´
1
V
LTF
1
V
HTF
-
RTH
HOT
´ - ´RTH
COLD
V
O(VTSB)
HTF
V
- 1
( )
V
O(VTSB)
LTF
V
- 1
( )
1
RT2
1
RTH
COLD
+
V
O(VTSB)
LTF
V
- 1
RT1=
Where:
V =V % /100
LTF O(VTSB) LTF 100¸
V =V % /100
HTF O(VTSB) HTF 100¸
´
´
RTH
COLD
+ 27.28 kW
RT1 + 9.31 kW
RTH
HOT
+ 4.912 kW
RT2 + 442 kW
bq24100, bq24103, bq24103A
bq24104, bq24105, bq24108, bq24109
bq24113, bq24113A, bq24115
www.ti.com SLUS606O –JUNE 2004–REVISED MARCH 2010
6. Determine TTC capacitor (
TTC
) for the 5.0 hours safety timer using the following equation:
(22)
Select standard value 100 nF, 16V, X7R, ±10% ceramic capacitor (i.e., Panasonic ECJ-1VB1C104K). Using
this capacitor the actual safety timer will be 4.3 hours.
7. Determine TS resistor network for an operating temperature range from 0°C to 45°C.
Figure 17. TS Resistor Network
Assuming a 103AT NTC Thermistor on the battery pack, determine the values for RT1 and RT2 using the
following equations:
(23)
(24)
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