SS6803 Datasheet, PDF (1/12 Pages) Silicon Standard Corp. – Three-cell Lithium-Ion Battery Protection IC

SS6803
Three-cell Lithium-Ion Battery Protection IC
FEATURES
Ultra-low quiescent current of 13µA (Vcell = 3.5V).
Ultra-low power-down current of 1.3µA (Vcell = 2.3V).
Wide supply voltage range: 2V to 18V.
Precision over-charge protection voltage:
4.35V±30mV for the SS6803A
4.30V±30mV for the SS6803B
4.25V±30mV for the SS6803C
4.20V±30mV for the SS6803D
Externally set over-charge, over-discharge and
over-current delay time.
Built-in cell-balancing bleeding network under
over-charge condition.
Three detection levels for over-current protection.
APPLICATIONS
Protection IC for three-cell lithium-ion battery pack.
DESCRIPTION
The SS6803 is designed to protect a lithium-ion
battery from damage or degraded lifetime due to
over-charging, over-discharging and over-current
for three-cell lithium-ion battery powered systems
such as notebook PCs.
It provides the cell-balancing "bleeding" function
to automatically discharge the over-charged cell
until the over-charge condition is eliminated.
Safe charging with full utilization is ensured by
the accurate ±30mV over-charge detection. Four
different specification values for over-charge
protection voltage are provided for various
protection requirements. The very low standby
current represents little drain from the cell while in
storage.
TYPICAL APPLICATION CIRCUIT
R8
1k
CTD
82nF
1
OC
2
CS
3
OD
4
NC
16
VCC
15
VC1
14
UD1
13
VC2
5
TD
6 _TI
UD2 ¹²
11
VC3
CTI
2.2nF
CTC
82nF
7
TC
8
NC
UD3 ¹⁰
GND ⁹
SS6803
R4 1k
C4
0.1µF
C1 ^{R1 2k}
0.1µF
R2 2K
C2
0.1µF
R3 33k
C3
0.1µF
M1
M2
BAT1
Q1
FUSE
R5
1M
BATT+
BAT2
R7
1M
BAT3
R6
1M
BATT-
Protection Circuit for a Three-cell Lithium-Ion Battery Pack
12/29/2003 Rev.2.02
www.SiliconStandard.com
1 of 12