UCC3952- Datasheet, PDF (1/5 Pages) Texas Instruments – Enhanced Single Cell Lithium-Ion Battery Protection IC

UCC3952-1/-2/-3/-4
Enhanced Single Cell Lithium-Ion Battery Protection IC
FEATURES
• Protects sensitive Lithium Ion cells
from over-charging and
over-discharging
• Dedicated for one cell applications
• Integrated low impedance MOSFET
switch and sense resistor
• Precision trimmed overcharge and
overdischarge voltage limits
• Extremely low power drain
• 3A current capacity
• Overcurrent and Short Circuit
Protection
• Reverse Charger Protection
• 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 TCLK
+
2 N/C
3 BNEG
4 BNEG
5 BNEG
6 BNEG
7 BNEG
8
BNEG
PACK+
16
3k
CBPS
15
N/C 14
0.1µF
PACK– 13
CHARGER
PACK– 12
PACK– 11
LOAD
PACK– 10
9
PACK–
SLUS400A - FEBRUARY 2000
UDG-98205