PROTECTION IC. S-8204A Datasheet
© Seiko Instruments Inc., 2007-2015
BATTERY PROTECTION IC
FOR 3-SERIES OR 4-SERIES CELL PACK
The S-8204A Series includes high-accuracy voltage detection circuits and delay circuits, in single use, makes it
possible for users to monitor the status of 3-series or 4-series cell lithium-ion rechargeable battery. By switching
the voltage level which is applied to the SEL pin, users are able to use the S-8204A Series either for 3-series or
4-series cell pack.
By cascade connection using the S-8204A Series, it is also possible to protect 6-series or more cells*1
lithium-ion rechargeable battery pack.
*1. Refer to the application note for connection examples of protection circuit for 6-series or more cells.
In case of protecting 5-series cell lithium-ion rechargeable battery pack, contact our sales office.
• High-accuracy voltage detection function for each cell
Overcharge detection voltage n (n = 1 to 4)
Overcharge release voltage n (n = 1 to 4)
3.8 V to 4.6 V (50 mV step)
3.6 V to 4.6 V*1
Accuracy ±25 mV
Accuracy ±50 mV
Overdischarge detection voltage n (n = 1 to 4) 2.0 V to 3.0 V (100 mV step)
Overdischarge release voltage n (n = 1 to 4) 2.0 V to 3.4 V*2
Accuracy ±80 mV
Accuracy ±100 mV
• Discharge overcurrent detection function in 3-step
Discharge overcurrent detection voltage 1
0.05 V to 0.30 V (50 mV step) Accuracy ±15 mV
Discharge overcurrent detection voltage 2
0.5 V (fixed)
Accuracy ±100 mV
Load short-circuit detection voltage
1.0 V (fixed)
Accuracy ±300 mV
• Charge overcurrent detection function
Charge overcurrent detection voltage
−0.25 V to −0.05 V (50 mV step) Accuracy ±30 mV
• Settable by external capacitor; overcharge detection delay time, overdischarge detection delay time,
discharge overcurrent detection delay time 1, discharge overcurrent detection delay time 2, charge
overcurrent detection delay time
(Load short-circuit detection delay time is internally fixed.)
• Switchable between 3-series and 4-series cell by using the SEL pin
• Independent charge and discharge control by the control pins
• High-withstand voltage element
Absolute maximum rating: 24 V
• Wide operation voltage range
2 V to 22 V
• Wide operation temperature range
Ta = −40°C to +85°C
• Low current consumption
33 μA max. (Ta = +25°C)
• Lead-free, Sn 100%, halogen-free*3
0.1 μA max. (Ta = +25°C)
*1. Overcharge hysteresis voltage n (n = 1 to 4) is selectable in 0 V, or in 0.1 V to 0.4 V in 50 mV step.
(Overcharge hysteresis voltage = Overcharge detection voltage − Overcharge release voltage)
*2. Overdischarge hysteresis voltage n (n = 1 to 4) is selectable in 0 V, or in 0.2 V to 0.7 V in 100 mV step.
(Overdischarge hysteresis voltage = Overdischarge release voltage − Overdischarge detection voltage)
*3. Refer to " Product Name Structure" for details.
• Rechargeable lithium-ion battery pack
• 16-Pin TSSOP
Seiko Instruments Inc.
BATTERY PROTECTION IC FOR 3-SERIES OR 4-SERIES CELL PACK
+ overcurrent 1
− Short circuit
charge 3 −
charge 4 −
discharge 4 +
Remark Diodes in the figure are parasitic diodes.
2 Seiko Instruments Inc.