S-8233A Series BATTERY PROTECTION IC FOR 3-SERIAL-CELL PACK www.sii-ic.com Seiko Instruments Inc., 1997-2013 Rev.6.0 01 The S-8233A Series is a series of lithium-ion rechargeable battery protection ICs incorporating high-accuracy voltage detection circuits and delay circuits. It is suitable for a 3-serial-cell lithium-ion rechargeable battery pack. Features (1) Internal high-accuracy voltage detection circuit y Overcharge detection voltage 4.10 0.05 V to 4.35 0.05 V 50 mV- step y Overcharge release voltage 3.85 0.10 V to 4.35 0.10 V 50 mV- step (The overcharge release voltage can be selected within the range where a difference from overcharge detection voltage is 0 V to 0.3 V) y Overdischarge detection voltage 2.00 0.08 V to 2.70 0.08 V 100 mV- step y Overdischarge release voltage 2.00 0.10 V to 3.70 0.10 V 100 mV - step (The overdischarge release voltage can be selected within the range where a difference from overdischarge detection voltage is 0 V to 1.0 V) y Overcurrent detection voltage 1 0.15 0.015 V to 0.50 0.05 V 50 mV-step (2) High-withstand voltage device (absolute maximum rating: 26 V) (3) Wide operating voltage range: 2 V to 24 V (4) The delay time for every detection can be set via an external capacitor. (5) Three overcurrent detection levels (protection for short-circuiting) (6) Internal charge/discharge prohibition circuit via the control pin (7) The function for charging batteries from 0 V is available. (8) Low current consumption y Operation 50 A max. (+25 C) y Power-down 0.1 A max. (+25 C) *1 (9) Lead-free, Sn 100%, halogen-free *1. Refer to Product Name Structure for details. Applications y Lithium-ion rechargeable battery packs y Lithium polymer rechargeable battery packs Package y 16-Pin TSSOP Seiko Instruments Inc. 1BATTERY PROTECTION IC FOR 3-SERIAL-CELL PACK S-8233A Series Rev.6.0 01 Block Diagram Reference Overcurrent Overcurrent 2,3 voltage 1 detection VCC VMP delay circuit circuit + Battery 1 Overcharge Overcurrent1, CD1 COVT delay circuit + Battery 1 Overdischarge Overdischarge CDT VC1 delay circuit Battery 1 Overcharge Control + Logic Battery 2 Overcharge Overcharge CD2 CCT + delay circuit Battery 2 Overdischarge Reference voltage 2 DOP VC2 Battery 2 Overcharge + Battery 3 Overcharge COP CD3 + Battery 3 Overdischarge Reference voltage 3 Floating CTL VSS Battery 3 detection circuit Overcharge Figure 1 Remark The delay time for overcurrent detection 2 and 3 is fixed by an internal IC circuit. The delay time cannot be changed via an external capacitor. 2 Seiko Instruments Inc.