S-8264A/B Series BATTERY PROTECTION IC FOR 2-SERIAL TO 4-SERIAL-CELL PACK (SECONDARY PROTECTION) www.sii-ic.com © Seiko Instruments Inc., 2005-2011 Rev.3.1_00 The S-8264A/B Series is used for secondary protection of lithium-ion rechargeable batteries, and incorporates a high-accuracy voltage detection circuit and a delay circuit. Short-circuits between cells accommodate series connection of two to four cells. Features (1) High-accuracy voltage detection circuit for each cell • Overcharge detection voltage n (n = 1 to 4) 4.20 V to 4.80 V (in 50 mV steps) Accuracy : ±25 mV (+25°C), Accuracy : ±30 mV (−5°C to +55°C) • Overcharge hysteresis voltage n (n = 1 to 4) −0.52 ±0.21 V, −0.39 ±0.16 V, −0.26 ±0.11 V, −0.13 ±0.06 V, None (2) Delay times for overcharge detection can be set by an internal circuit only (external capacitors are unnecessary) (3) Output control function via CTL pin (S-8264A Series) (4) Output latch function after overcharge detection (S-8264B Series) (5) Output form and logic CMOS output active “H” (6) High withstand voltage devices Absolute maximum rating : 26 V (7) Wide operating voltage range 3.6 V to 24 V (8) Wide operating temperature range −40°C to +85°C (9) Low current consumption • At 3.5 V for each cell 5.0 μA max. (+25°C) • At 2.3 V for each cell 4.0 μA max. (+25°C) (10) Lead-free, Sn 100%, halogen-free*1 *1. Refer to “ Product Name Structure” for details. Application • Lithium-ion rechargeable battery packs (for secondary protection) Packages • SNT-8A • 8-Pin TSSOP Seiko Instruments Inc. 1 BATTERY PROTECTION IC FOR 2-SERIAL TO 4-SERIAL-CELL PACK (SECONDARY PROTECTION) S-8264A/B Series Rev.3.1_00 Block Diagrams (1) S-8264A Series VDD SENSE Overcharge detection comparator 1 + − Reference voltage 1 VC1 Overcharge detection Oscillator comparator 2 + Overcharge detection/release − delay circuit Reference voltage 2 Control logic VC2 Overcharge detection comparator 3 + − CO Reference voltage 3 VC3 Overcharge detection comparator 4 + − Reference voltage 4 VSS CTL Remark The diodes in the figure are parasitic diodes. Figure 1 2 Seiko Instruments Inc. BATTERY PROTECTION IC FOR 2-SERIAL TO 4-SERIAL-CELL PACK (SECONDARY PROTECTION) Rev.3.1_00 S-8264A/B Series (2) S-8264B Series VDD SENSE Overcharge detection comparator 1 + − Reference voltage 1 VC1 Overcharge detection comparator 2 Oscillator + Overcharge detection/release − delay circuit Reference voltage 2 Control VC2 Overcharge logic detection comparator 3 + − SR CO Reference voltage 3 latch VC3 Overcharge detection comparator 4 + − Reference voltage 4 VSS CTL UVLO Remark The diodes in the figure are parasitic diodes. Figure 2 Seiko Instruments Inc. 3 BATTERY PROTECTION IC FOR 2-SERIAL TO 4-SERIAL-CELL PACK (SECONDARY PROTECTION) S-8264A/B Series Rev.3.1_00 Product Name Structure 1. Product Name S-8264 x xx - xxxx x Environmental code U : Lead-free (Sn 100%), halogen-free G : Lead-free (for details, please contact our sales office) Package abbreviation and IC packing specification*1 I8T1 : SNT-8A, tape product T8T1: 8-Pin TSSOP, tape product Serial code*2 Sequentially set from AA to AZ Product type A : Without CO pin output latch function B : With CO pin output latch function *1. Refer to the tape specifications at the end of this book. *2. Refer to “3. Product Name List”. 2. Package Drawing Code Package Name Package Tape Reel Land SNT-8A PH008-A-P-SD PH008-A-C-SD PH008-A-R-SD PH008-A-L-SD Environmental code = G FT008-A-P-SD FT008-E-C-SD FT008-E-R-SD 8-Pin TSSOP ⎯ Environmental code = U FT008-A-P-SD FT008-E-C-SD FT008-E-R-S1 4 Seiko Instruments Inc. BATTERY PROTECTION IC FOR 2-SERIAL TO 4-SERIAL-CELL PACK (SECONDARY PROTECTION) Rev.3.1_00 S-8264A/B Series 3. Product Name List (1) S-8264A Series Table 1 SNT-8A Overcharge Detection Overcharge Hysteresis Overcharge Detection Product Name / Item Output Form Voltage [VCU] Voltage [VHC] Delay Time [tCU] S-8264AAA-I8T1x 4.45 ±0.025 V −0.39 ±0.16 V 4.0 ±0.8 s CMOS output active “H” S-8264AAB-I8T1x 4.35 ±0.025 V −0.39 ±0.16 V 4.0 ±0.8 s CMOS output active “H” S-8264AAC-I8T1x 4.50 ±0.025 V −0.39 ±0.16 V 4.0 ±0.8 s CMOS output active “H” S-8264AAD-I8T1x 4.35 ±0.025 V −0.39 ±0.16 V 2.0 ±0.4 s CMOS output active “H” S-8264AAE-I8T1x 4.30 ±0.025 V −0.39 ±0.16 V 4.0 ±0.8 s CMOS output active “H” S-8264AAF-I8T1x 4.45 ±0.025 V −0.39 ±0.16 V 2.0 ±0.4 s CMOS output active “H” S-8264AAG-I8T1x 4.30 ±0.025 V −0.39 ±0.16 V 2.0 ±0.4 s CMOS output active “H” S-8264AAH-I8T1x 4.40 ±0.025 V −0.39 ±0.16 V 4.0 ±0.8 s CMOS output active “H” S-8264AAI-I8T1x 4.40 ±0.025 V −0.39 ±0.16 V 2.0 ±0.4 s CMOS output active “H” S-8264AAJ-I8T1x 4.45 ±0.025 V −0.39 ±0.16 V 5.65 ±1.15 s CMOS output active “H” S-8264AAK-I8T1x 4.35 ±0.025 V −0.39 ±0.16 V 5.65 ±1.15 s CMOS output active “H” Table 2 8-Pin TSSOP Overcharge Detection Overcharge Hysteresis Overcharge Detection Product Name / Item Output Form Voltage [VCU] Voltage [VHC] Delay Time [tCU] S-8264AAA-T8T1x 4.45 ±0.025 V −0.39 ±0.16 V 4.0 ±0.8 s CMOS output active “H” S-8264AAB-T8T1x 4.35 ±0.025 V −0.39 ±0.16 V 4.0 ±0.8 s CMOS output active “H” (2) S-8264B Series Table 3 SNT-8A Overcharge Detection Overcharge Hysteresis Overcharge Detection Product Name / Item Output Form Voltage [VCU] Voltage [VHC] Delay Time [tCU] S-8264BAA-I8T1x 4.45 ±0.025 V −0.39 ±0.16 V 4.0 ±0.8 s CMOS output active “H” S-8264BAB-I8T1x 4.35 ±0.025 V −0.39 ±0.16 V 4.0 ±0.8 s CMOS output active “H” Remark 1. Please contact our sales department for the products with detection voltage value other than those specified above. 2. x: G or U 3. Please select products of environmental code = U for Sn 100%, halogen-free products. Seiko Instruments Inc. 5 BATTERY PROTECTION IC FOR 2-SERIAL TO 4-SERIAL-CELL PACK (SECONDARY PROTECTION) S-8264A/B Series Rev.3.1_00 Pin Configurations Table 4 Pin No. Symbol Description 1 VDD Positive power input pin SNT-8A 2 SENSE Positive voltage connection pin of battery 1 Negative voltage connection pin of battery 1 Top view 3 VC1 Positive voltage connection pin of battery 2 VDD 1 8 CO Negative voltage connection pin of battery 2 4 VC2 SENSE 2 7 CTL Positive voltage connection pin of battery 3 Negative voltage connection pin of battery 3 VC1 3 6 VSS 5 VC3 Positive voltage connection pin of battery 4 VC2 4 5 VC3 Negative power input pin 6 VSS Negative voltage connection pin of battery 4 CO output control pin (S-8264A Series) 7 CTL Overcharge detection latch reset pin (S-8264B Series) 8 CO FET gate connection pin for charge Figure 3 Table 5 Pin No. Symbol Description 1 VDD Positive power input pin 2 SENSE Positive voltage connection pin of battery 1 8-Pin TSSOP Negative voltage connection pin of battery 1 Top view 3 VC1 Positive voltage connection pin of battery 2 VDD 1 8 CO Negative voltage connection pin of battery 2 4 VC2 SENSE 2 7 CTL Positive voltage connection pin of battery 3 VC1 3 6 VSS Negative voltage connection pin of battery 3 VC2 4 5 VC3 5 VC3 Positive voltage connection pin of battery 4 Negative power input pin 6 VSS Negative voltage connection pin of battery 4 CO output control pin (S-8264A Series) 7 CTL Overcharge detection latch reset pin (S-8264B Series) 8 CO FET gate connection pin for charge Figure 4 6 Seiko Instruments Inc. BATTERY PROTECTION IC FOR 2-SERIAL TO 4-SERIAL-CELL PACK (SECONDARY PROTECTION) Rev.3.1_00 S-8264A/B Series Absolute Maximum Ratings Table 6 (Ta = 25°C unless otherwise specified) Item Symbol Applied Pins Rating Unit Input voltage between VDD and VSS VDS VDD VSS − 0.3 to VSS + 26 V Input pin voltage VIN SENSE, VC1, VC2, VC3, CTL VSS − 0.3 to VDD + 0.3 V CO output pin voltage VCO CO VSS − 0.3 to VDD + 0.3 V SNT-8A 450*1 mW Power dissipation PD ⎯ 8-Pin TSSOP 700*1 mW Operation ambient temperature Topr ⎯ −40 to +85 °C Storage temperature Tstg ⎯ −40 to +125 °C *1. When mounted on board [Mounted board] (1) Board size : 114.3 mm × 76.2 mm × t1.6 mm (2) Name : JEDEC STANDARD51-7 Caution The absolute maximum ratings are rated values exceeding which the product could suffer physical damage. These values must therefore not be exceeded under any conditions. 800 8-Pin TSSOP ) [mW] 600 D SNT-8A 400 200 Power Dissipation (P Power Dissipation 0 0 50 100 150 Ambient Temperature (Ta) [°C] Figure 5 Power Dissipation of Package (When Mounted on Board) Seiko Instruments Inc. 7 BATTERY PROTECTION IC FOR 2-SERIAL TO 4-SERIAL-CELL PACK (SECONDARY PROTECTION) S-8264A/B Series Rev.3.1_00 Electrical Characteristics 1.