S-8252 Series

www.sii-ic.com

BATTERY PROTECTION IC

FOR 2-SERIAL-CELL PACK

© Seiko Instruments Inc., 2011-2015

Seiko Instruments Inc.

1

The S-8252 Series is a protection IC for 2-serial-cell lithium-ion / lithium polymer rechargeable batteries and includes high-

accuracy voltage detection circuits and delay circuits.

The S-8252 Series is suitable for protecting 2-serial-cell rechargeable lithium-ion / lithium polymer battery packs from

overcharge, overdischarge, and overcurrent.



Features

• High-accuracy voltage detection function for each cell

Overcharge detection voltage n (n = 1, 2)

3.550 V to 4.600 V (5 mV steps)

Accuracy

±20 mV (Ta = +25°C)

Accuracy

±25 mV (Ta = −10°C to +60°C)

Overcharge release voltage n (n = 1, 2)

3.150 V to 4.600 V

*1

Accuracy

±30 mV

Overdischarge detection voltage n (n = 1, 2)

2.00 V to 3.00 V (10 mV steps)

Accuracy

±50 mV

Overdischarge release voltage n (n = 1, 2)

2.00 V to 3.40 V

*2

Accuracy

±100 mV

Discharge overcurrent detection voltage

0.05 V to 0.40 V (10 mV steps)

Accuracy

±10 mV

Load short-circuiting detection voltage

0.5 V (fixed)

Accuracy

±100 mV

Charge overcurrent detection voltage

−0.40 V to −0.05 V (25 mV steps) Accuracy ±20 mV

• Charge overcurrent detection function "available" / "unavailable" is selectable.

• Detection delay times are generated only by an internal circuit (external capacitors are unnecessary).

Accuracy

±20%

• High-withstand voltage device is used for charger connection pins

(VM pin and CO pin: Absolute maximum rating = 28 V)

• 0 V battery charge function "available" / "unavailable" is selectable.

• Power-down function "available" / "unavailable" is selectable.

• Wide operation temperature range

Ta =

−40°C to +85°C

• Low current consumption

During operation

8.0

During power-down

0.1

• Lead-free (Sn 100%), halogen-free

*1. Overcharge release voltage = Overcharge detection voltage

− Overcharge hysteresis voltage

(Overcharge hysteresis voltage n (n = 1, 2) can be selected as 0 V or from a range of 0.10 V to 0.40 V in 50 mV

steps.)

*2. Overdischarge release voltage = Overdischarge detection voltage

+ Overdischarge hysteresis voltage

(Overdischarge hysteresis voltage n (n = 1, 2) can be selected as 0 V or from a range of 0.1 V to 0.7 V in 100 mV

steps.)



Applications

• Lithium-ion rechargeable battery pack

• Lithium polymer rechargeable battery pack



Packages

• SOT-23-6

• SNT-6A