UCC3952A-1 Datasheet, PDF (1/9 Pages) Texas Instruments – SINGLE-CELL LITHIUM-LON BATTERY PROTECTION IC

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UCC3952A-1, UCC3952A-2, UCC3952A-3, UCC3952A-4
SINGLEĆCELL LITHIUMĆION BATTERY PROTECTION IC
D Protects Sensitive Lithium-Ion Cells From
Overcharging and Over-Discharging
D Dedicated for One-Cell Applications
D Integrated Low-Impedance MOSFET Switch
and Sense Resistor
D Precision Trimmed Overcharge and
Overdischarge Voltage Limits
D Extremely Low Power Drain
D 3.5-A Current Capacity
D Overcurrent and Short-Circuit Protection
D Reverse Charger Protection
D Thermal Protection
SLUS463C − AUGUST 2000 − REVISED MARCH 2001
GSH PACKAGE
(TOP VIEW)
NC ₁ 18
NC ²
BNEG ³
BNEG ⁴
BNEG ⁵
BNEG ⁶
BNEG ⁷ 8
17 ₁₆ PACK+
15 ^CBPS
14 NC
13 PACK−
12 PACK−
11 ^PACK−
9 ¹⁰ PACK−
description
The UCC3952A is a monolithic BiCMOS lithium−ion battery protection circuit designed to enhance the useful
operating life of a one-cell rechargeable battery pack. Cell protection features include 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 discharged. Additional features include an on-chip MOSFET for reduced external
component count and a charge pump for reduced power losses while charging or discharging a low-cell-voltage
battery pack. This protection circuit requires one external capacitor and can operate and safely shut down in
a short circuit condition.
application diagram
TCLK
18
1 NC
PACK+
17
PACK+
16
+
2 NC
3 kΩ
CBPS
15
3 BNEG
4 BNEG
5 BNEG
6 BNEG
BNEG
7
NC 14
PACK− 13
PACK− 12
PACK− 11
PACK− 10
PACK−
9
0.1 µF
CHARGER
LOAD
8 NC
UDG−98205
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Copyright  2001, Texas Instruments Incorporated
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