Battery Protection IC monitors 1-cell packs.January 11, 2010 -
Featuring voltage detection circuit and delay circuit, S-8211E Series is suitable for monitoring overcharge and overdischarge of 1-cell lithium ion/lithium polymer secondary battery packs. Overcharge detection voltage ranges from 3.6-4.4 V with accuracy of ±25 mV at +25°C and ±30 mV from -5 to +55°C. Overdischarge detection voltage ranges from 2.0-3.0 V with ±50 mV accuracy. Housed in SOT-23-5 package, lead-free IC operates from -40 to +85°C while typically consuming 3.0 µA.
(Archive News Story - Products mentioned in this Archive News Story may or may not be available from the manufacturer.)
Original Press release
Seiko Instruments U.S.A., Inc.
2990 W. Lomita Blvd.
Torrance, CA, 90505
USA
Battery Protection IC for 1-Cell Pack S-8211E Series
The S-8211E Series has the high-accuracy voltage detection circuit and the delay circuit. This IC is suitable for monitoring overcharge and overdischarge of 1-cell lithium ion / lithium polymer secondary battery pack.
o Overview
Features
1. High-accuracy voltage detection circuit
- Overcharge detection voltage 3.6 V to 4.4 V (5 mV step) Accuracy ±25 mV (+25°C) / Accuracy ±30 mV (-5°C to +55°C)
- Overcharge release voltage 3.5 V to 4.4 V*1 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*2 Accuracy ±100 mV
2. Detection delay times are generated by an internal circuit (external capacitors are unnecessary) Accuracy ±20%
3. Wide operating temperature range -40°C to +85°C
4. Low current consumption
- Operation mode 3.0 µA typ., 5.5 µA max. (+25°C)
- Overdischarge mode 2.0 µA typ., 3.5 µA max. (+25°C)
5. Small package: SOT-23-5, SNT-6A
6. Lead-free product
*1. Overcharge release voltage = Overcharge detection voltage - Overcharge hysteresis voltage (Overcharge hysteresis voltage can be selected as 0 V or from a range of 0.1 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 as 0 V or from a range of 0.1 V to 0.7 V in 100 mV step.)
Applications
o Lithium-ion rechargeable battery packs
o Lithium-polymer rechargeable battery packs
|
|
|
|
|
|
|
|
|
|
| 
