SS6804 Datasheet, PDF (1/12 Pages) Silicon Standard Corp. – Three/Four-cell Lithium-Ion Battery Protection IC

SS6804
Three/Four-cell Lithium-Ion Battery Protection IC
FEATURES
DESCRIPTION
Ultra-low quiescent current, 17µA (4-cell, Vcell = 3.5V).
Ultra-low power-down current, 2.2µA (4-cell, Vcell = 2.3V).
Wide supply voltage range: 2V to 18V.
Precision over-charge protection voltage:
4.35V±30mV for the SS6804A
4.30V±30mV for the SS6804B
4.25V±30mV for the SS6804C
4.20V±30mV for the SS6804D
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/four-cell lithium-ion battery packs.
The SS6804 is designed to protect a lithium-ion
battery from damage or degraded lifetime due to
over-charging, over-discharging and over-current
for three- or four-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
CTD
82nF
CTI
2.2nF
R8
1K
1 _NSL
2 _OC
3 _CS
4 _OD
5 _TD
6 _TI
7 _TC
CTC
82nF _{8 GND}
VCC ¹⁶
R1
C1
200
0.1µF
UD1 ¹⁵
VC1 ¹⁴
R2
C2
2K
0.1µF
UD2 ¹³
VC2 ¹²
R3
C3
2K
0.1µF
UD3 ¹¹
VC3 ¹⁰
C4
UD4 ⁹
R4
33K
0.1µF
SS6804
SSM4435M M1 ^SSM4435M
M2
BAT1
BAT2
BAT3
BAT4
R7
1M
BATT-
FUSE
R5
1M
R6
1M
BATT+
Protection Circuit for Four-Cell Lithium-Ion Battery Pack
12/29/2003 Rev.2.02
www.SiliconStandard.com
1 of 12