SII Semiconductor Corp., a subsidiary of Seiko Instruments Inc., has introduced the S-8223A/B/C/D series 2-to-3 cell secondary battery protection IC for lithium-ion rechargeable batteries. They are characterized by an ultra-small SNT-6A package measuring 1.6 by 1.8 by 0.5 mm and a current consumption of 0.25 μA. The S-8223A/B/C/D series is well for protecting lithium-ion batteries in laptop computers and other portable devices.
Lithium-ion batteries require protection from overcharge, overdischarge, overcurrent, and short circuits. The use of a secondary protection IC such as the S-8223A/B/C/D series is especially critical in cases of overcharge conditions which may result in heating and ignition of the lithium-ion batteries. The S-8223A/B/C/D series provides the design engineer with another robust layer of safety.
The main feature of the S-8223A/B/C/D series is the ultra-small SNT-6A package, which leads to a reduction in the size, thickness and weight for portable devices. Secondly, the low operating current consumption of 0.25 μA helps prolong the battery operating time. Lastly, the S-8223 series has a high class accuracy in overcharge detection voltage at 20 mV. This provides enhanced safety monitoring of lithium-ion rechargeable batteries. The S-8223B/D series has a gate connection terminal of the charge control FET equipped with an output voltage control circuit, meaning the series is also compatible with a FET at a gate-source withstanding voltage of 12 volts.