鈥?/div>
Thermal Protection
DESCRIPTION
The UCC3952 is a monolithic BiCMOS lithium-ion battery protection circuit
that is designed to enhance the useful operating life of one cell recharge-
able battery pack. Cell protection features consist of internally trimmed
charge and discharge voltage limits, discharge current limit with a delayed
shutdown and an ultra low current sleep mode state when the cell is dis-
charged. Additional features include an on chip MOSFET for reduced exter-
nal component count and a charge pump for reduced power losses while
charging or discharging a low cell voltage battery pack. This protection cir-
cuit requires one external capacitor and is able to operate and safely shut-
down in the presence of a short circuit condition.
APPLICATION DIAGRAM
1
+
2
TCLK
3k
N/C
16
PACK+
15
CBPS
3
BNEG
N/C
14
0.1碌F
4
BNEG
PACK鈥?/div>
13
CHARGER
5
BNEG
PACK鈥?/div>
12
LOAD
6
BNEG
PACK鈥?/div>
11
7
BNEG
PACK鈥?/div>
10
8
BNEG
PACK鈥?/div>
9
UDG-98205
SLUS400A - FEBRUARY 2000
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