LV51139T Datasheet, PDF (1/7 Pages) Sanyo Semicon Device – 2-Cell Lithium-Ion Secondary Battery Protection IC

Ordering number : ENA1927
CMOS IC
LV51139T ^{2-Cell Lithium-Ion Secondary Battery}
Protection IC
Overview
The LV51139T is a protection IC for 2-cell lithium-ion secondary batteries.
Features
• Monitoring function for each cell:
• High detection voltage accuracy:
• Hysteresis cancel function:
• Discharge current monitoring function:
• Low current consumption:
• 0V cell charging function:
Detects overcharge and over-discharge conditions and controls the
charging and discharging operation of each cell.
Over-charge detection accuracy ±25mV
Over-discharge detection accuracy ±100mV
The hysteresis of over-discharge detection voltage is made small by
sensing the connection of a load after overcharging has been detected.
Detects over-currents, load shorting, and excessively high voltage of a
charger .
Normal operation mode typ. 6.0μA
Stand by mode
max. 0.2μA
Charging is enabled even when the cell voltage is 0V by giving a
potential difference between the VDD pin and V- pin.
Absolute Maximum Ratings at Ta = 25°C
Parameter
Power supply voltage
Input voltage
Charger minus voltage
Output voltage Cout pin voltage
Dout pin voltage
Allowable power dissipation
Operating ambient temperature
Storage temperature
Symbol
VDD
V-
Conditions
Vcout
Vdout
Pd max
Topr
Tstg
Independent IC
Ratings
Unit
-0.3 to +12
V
VDD-28 to VDD+0.3
V
VDD-28 to VDD+0.3
V
VSS-0.3 to VDD+0.3
V
170 mW
-30 to +85 °C
-40 to +125 °C
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21611 SY 20110204-S00003 No.A1927-1/7