S8250B Datasheet, PDF (1/32 Pages) Seiko Instruments Inc – BATTERY PROTECTION IC FOR 1-CELL PACK

S-8250B Series
www.sii-ic.com
© Seiko Instruments Inc., 2013-2015
BATTERY PROTECTION IC FOR 1-CELL PACK
Rev.1.1_00
The S-8250B Series is a protection IC for 1-cell lithium-ion / lithium polymer rechargeable batteries and includes
high-accuracy voltage detection circuits and delay circuits.
The S-8250B Series is suitable for protecting 1-cell lithium-ion / lithium polymer rechargeable battery packs from overcharge,
overdischarge and overcurrent. By adjusting power supply voltage dependency of discharge overcurrent detection voltage in
accordance with ON resistance of the charge-discharge control FET, the S-8250B Series realizes high-accuracy discharge
overcurrent detection.
 Features
• High-accuracy discharge overcurrent detection circuit
Discharge overcurrent detection voltage 0.05 V to 0.15 V (1 mV step)
Accuracy ±10 mV (Ta = +25°C)
(Power supply voltage dependency can be set in accordance with ON resistance of the charge-discharge control FET.)
• High-accuracy voltage detection circuit
Overcharge detection voltage
4.1 V to 4.6 V (5 mV step)
Accuracy ±20 mV (Ta = +25°C)
Overcharge release voltage
3.7 V to 4.6 V^*1
Accuracy ±25 mV (Ta = −10°C to +60°C)
Accuracy ±30 mV
Overdischarge detection voltage
Overdischarge release voltage
2.0 V to 2.8 V (10 mV step)
2.0 V to 3.0 V^*2
Accuracy ±50 mV
Accuracy ±100 mV
Load short-circuiting detection voltage
0.25 V to 0.50 V (50 mV step) Accuracy ±50 mV
Charge overcurrent detection voltage
−0.20 V to −0.025 V (25 mV step) Accuracy ±15 mV
• Detection delay times are generated only by an internal circuit (External capacitors are unnecessary).
• 0 V battery charge function is selectable:
Available, unavailable
• Power-down function is selectable:
Available, unavailable
• Release condition of discharge overcurrent status is selectable:
Load disconnection, charger connection
• High-withstand voltage device is used for charger connection pins: VM pin and CO pin: Absolute maximum rating 28 V
• Wide operation temperature range:
Ta = −40°C to +85°C
• Low current consumption
During operation:
2.0 μA typ., 4.0 μA max. (Ta = +25°C)
During power-down:
50 nA max. (Ta = +25°C)
• Lead-free (Sn 100%), halogen-free
*1. Overcharge release voltage = Overcharge detection voltage − Overcharge hysteresis voltage
(Overcharge hysteresis voltage can be selected from a range of 0 V to 0.4 V in 50 mV step.)
*2. Overdischarge release voltage = Overdischarge detection voltage + Overdischarge hysteresis voltage
(Overdischarge hysteresis voltage can be selected from a range of 0 V to 0.7 V in 100 mV step.)
 Applications
• Lithium-ion rechargeable battery pack
• Lithium polymer rechargeable battery pack
 Package
• SNT-6A
Seiko Instruments Inc.
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