S-8209A Series

www.sii-ic.com

BATTERY PROTECTION IC

WITH CELL-BALANCE FUNCTION

© Seiko Instruments Inc., 2008-2014

Seiko Instruments Inc.

1

The S-8209A Series is a protection IC for lithium-ion / lithium polymer rechargeable batteries and includes a high-accuracy

voltage detection circuit and a delay circuit.

The S-8209A Series has a transmission function and two types of cell-balance function so that users are also able to configure

a protection circuit with series multi-cell.



Features

• High-accuracy voltage detection circuit

Overcharge detection voltage

*1

3.55 V to 4.40 V (5 mV step)

Accuracy

±25 mV

Overcharge release voltage

*1

3.50 V to 4.40 V

*2

Accuracy

±50 mV

Cell-balance detection voltage

*1

3.55 V to 4.40 V (5 mV step)

*3

Accuracy

±25 mV

Cell-balance release voltage

*1

3.50 V to 4.40 V

*4

Accuracy

±50 mV

Overdischarge detection voltage

2.0 V to 3.0 V (10 mV step)

Accuracy

±50 mV

Overdischarge release voltage

2.0 V to 3.4 V

*5

Accuracy

±100 mV

• Settable delay time by external capacitor for output pin

• Control charging, discharging, cell-balance by CTLC pin and CTLD pin

• Two types of cell-balance function; charge / discharge

*6

• Wide range of operation temperature

Ta =

−40°C to +85°C

• Low current consumption

7.0

μA max.

• Lead-free, Sn 100%, halogen-free

*7

*1. Regarding selection of overcharge detection voltage, overcharge release voltage, cell-balance detection voltage

and cell-balance release voltage, refer to Remark 3 in "3. Product name list" of "

*2. Overcharge release voltage = Overcharge detection voltage

− Overcharge hysteresis voltage

(Overcharge hysteresis voltage is selectable in 0 V to 0.4 V, in 50 mV step.)

*3. Select as to overcharge detection voltage

> cell-balance detection voltage.

*4. Cell-balance release voltage = Cell-balance detection voltage

− Cell-balance hysteresis voltage

(Cell-balance hysteresis voltage is selectable in 0 V to 0.4 V, in 50 mV step.)

*5. Overdischarge release voltage = Overdischarge detection voltage

+ Overdischarge hysteresis voltage

(Overdischarge hysteresis voltage is selectable in 0 V to 0.7 V, in 100 mV step.)

*6. Also available the product without discharge cell-balance function

*7. Refer to " Product Name Structure" for details.



Applications

• Lithium-ion rechargeable battery pack

• Lithium polymer rechargeable battery pack



Packages

• 8-Pin TSSOP

• SNT-8A