S-8209B Series
www.sii-ic.com
BATTERY PROTECTION IC
WITH CELL-BALANCE FUNCTION
© Seiko Instruments Inc., 2008-2014 Rev.3.3_00
Seiko Instruments Inc.
1
The S-8209B 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-8209B 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, CTLD pins
• 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 "
Product Name Structure".
*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
• SNT-8A
• 8-Pin TSSOP
