S-8232 Series BATTERY PROTECTION IC FOR 2-SERIAL-CELL PACK www.sii-ic.com Seiko Instruments Inc., 1999-2015 Rev.6.2 00 The S-8232 series is a lithium-ion / lithium-polymer rechargeable battery protection IC incorporating high- accuracy voltage detection circuit and delay circuit. The S-8232 series is suitable for 2-cell serial lithium-ion / lithium-polymer battery packs. Features (1) Internal high-accuracy voltage detection circuit Overcharge detection voltage 3.85 V 25 mV to 4.60 V 25 mV Applicable in 5 mV step Overcharge release voltage 3.60 V 50 mV to 4.60 V 50 mV Applicable in 5 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.) Overdischarge detection voltage 1.70 V 80 mV to 2.60 V 80 mV Applicable in 50 mV step Overdischarge release voltage 1.70 V 100 mV to 3.80 V 100 mV Applicable in 50 mV step (The overdischarge release voltage can be selected within the range where a difference from overdischarge detection voltage is 0 V to 1.2 V.) Overcurrent detection voltage 1 0.07 V 20 mV to 0.30 V 20 mV Applicable in 5 mV step (2) High input-voltage device : Absolute maximum ratings 18 V. (3) Wide operating voltage range : 2.0 V to 16 V (4) The delay time for every detection can be set via an external capacitor. (Each delay time for Overcharge detection, Overdischarge detection, Overcurrent detection are Proportion of hundred to ten to one.) (5) Two overcurrent detection levels (Protection for short-circuiting) (6) Internal auxiliary over voltage detection circuit (Fail-safe for overcharge detection voltage) (7) Internal charge circuit for 0 V battery (Unavailable is option) (8) Low current consumption Operation mode 7.5 A typ. 14.2 A max. ( 40C to + 85C) Power-down mode 0.2 nA typ. 0.1 A max. ( 40C to + 85C) *1 (9) Lead-free, Sn100%, halogen-free *1. Refer to Product Name Structure for details. Applications Lithium-ion rechargeable battery packs Lithium- polymer rechargeable battery packs Package 8-Pin TSSOP Seiko Instruments Inc. 1 NOT RECOMMENDED FOR NEW DESIGNBATTERY PROTECTION IC FOR 2-SERIAL-CELL PACK S8232 Series Rev.6.2 00 Block Diagram VCC Reference SENS voltage 1 Auxiliary overcharge detector 1 + Overcharge detector 1 + Over- DO Delay circuit discharge control signal detector 1 + Control logic VC CO Over- discharge detector 2 RCOL + Overcharge detector 2 Over current + VM detection circuit Delay circuit control signal Delay circuit + control signal Delay circuit control signal Auxiliary Delay circuit overcharge ICT Reference VSS detector 2 voltage 2 DO, CO control signal Remark Resistor (RCOL) is connected to the Nch transistor although CO pin serves as a CMOS output. For this, impedance becomes high when outputting L from CO pin. Refer to the Electrical Characteristics for the impedance value. Figure 1 2 Seiko Instruments Inc. NOT RECOMMENDED FOR NEW DESIGN