Battery Protection IC monitors 1-cell packs.
Press Release Summary:
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.
Original Press Release:
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
