S-8242B Seiko Instruments, S-8242B Datasheet
S-8242B
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S-8242B Summary of contents
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... Lithium polymer rechargeable battery packs Packages Package Name SNT-8A 8-Pin TSSOP The S-8242B Series are protection ICs for 2-serial-cell lithium-ion/lithium include high-accuracy voltage detectors and delay circuits. These ICs are suitable for protecting 2-cell rechargeable lithium-ion / lithium polymer battery packs from overcharge, overdischarge, and overcurrent ...
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... BATTERY PROTECTION IC FOR 2-SERIAL-CELL PACK www.DataSheet4U.com S-8242B Series Block Diagram Remark All the diodes in the figure are parasitic diodes. 2 Delay circuit, controller battery charge/ charge inhibition circuit 300 kΩ Charger detector 10 kΩ Figure 1 Seiko Instruments Inc. − − ...
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... Voltage Voltage Voltage ( 4.350 V 4.150 V 2.3 V 4.300 V 4.100 V 2.4 V 4.250 V 4.050 V 2.4 V 4.100 V 3.800 V 2.2 V 4.300 V 4.100 V 2.6 V Seiko Instruments Inc. S-8242B Series Overdischarge Overcurrent Release Detection Voltage Voltage IOV1 2.9 V 0.21 V 2.9 V 0.08 V 2.9 V 0.08 V 3.0 V 0.20 V 3.0 V 0.28 V 2.9 V 0.25 V 2.9 V ...
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... BATTERY PROTECTION IC FOR 2-SERIAL-CELL PACK www.DataSheet4U.com S-8242B Series Pin Configurations SNT-8A Top view Figure 2 8-Pin TSSOP Top view Figure 3 4 Pin No. Symbol VSS VDD * *1. The NC pin is electrically open. ...
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... D T opr T stg 800 600 8-Pin TSSOP 400 200 SNT-8A 0 100 50 0 Ambient Temperature (Ta) [°C] Seiko Instruments Inc. S-8242B Series (Ta=25°C unless otherwise specified) Absolute Maximum Ratings Unit −0 + −0 +0 − +0 −0 ...
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... BATTERY PROTECTION IC FOR 2-SERIAL-CELL PACK www.DataSheet4U.com S-8242B Series Electrical Characteristics Item [DETECTION VOLTAGE] Overcharge detection voltage n Overcharge release voltage n Overdischarge detection voltage n Overdischarge release voltage n Overcurrent detection voltage 1 Overcurrent detection voltage 2 Charger detection voltage Temperature coefficient 1 Temperature coefficient 2 [DELAY TIME] Overcharge detection delay time ...
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... VM pin and VSS pin whose delay time IOV1 ) is defined as the voltage between the VM pin and VSS pin whose delay time IOV2 ) is defined as the voltage between the VM pin and VSS pin at which V CHA Seiko Instruments Inc. S-8242B Series ) and DO pin (V ) are CO DO goes CO – ...
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... BATTERY PROTECTION IC FOR 2-SERIAL-CELL PACK www.DataSheet4U.com S-8242B Series 5. Operating Current Consumption, VC Pin Current, Power-down Current Consumption (Test Condition 5, Test Circuit 3) The operating current consumption (I is the current I that flows through the VC pin under the set conditions 3.5 V and S1:OFF, S2:ON C (normal status). ...
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... Figure 6 Test circuit S-8242B Series Figure 7 Test circuit 3 VM S-8242B Series Figure 8 Test circuit 4 Seiko Instruments Inc. S-8242B Series R1=100 Ω VDD C1=1 µ VSS VDD VSS A VDD VSS VDD ...
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... When the battery voltage falls below overcharge release voltage n (V control FET on and returns to the normal status. (2) When a load is connected and discharging starts, the S-8242B Series turns the charging control FET on and returns to the normal status. Just after the load is connected and discharging starts, the discharging current flows through the parasitic diode in the charging control FET ...
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... When a battery in the overdischarge status is connected to a charger and provided that the VM pin voltage is lower than the charger detection voltage (V therefore, the S-8242B Series releases the overdischarge status and turns the discharging control FET on when the battery voltage becomes equal to or higher than overdischarge detection voltage n (V function works ...
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... FET is off and the charging current flows through the internal parasitic diode in the discharging control FET. When the battery voltage becomes equal to or higher than overdischarge release voltage n (V S-8242B Series enters the normal status. Caution Some battery providers do not recommend charging for a completely self-discharged battery. ...
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... Overcurrent detection delay time IOV2 V IOV1 V SS Figure 9 ) due to the overcurrent, the S-8242B Series turns the discharging DLn ), the S-8242B Series shifts to the power-down condition. DLn Seiko Instruments Inc. S-8242B Series ) is detected over the overcurrent detection IOV2 ), the S-8242B turns the IOV1 ...
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... BATTERY PROTECTION IC FOR 2-SERIAL-CELL PACK www.DataSheet4U.com S-8242B Series Timing Chart 1. Overcharge Detection, Overdischarge Detection V CUn V CLn Battery voltage V DUn V DLn ( pin voltage pin voltage − pin voltage V IOV1 CHA V EB − Charger connection ...
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... Charger connection *1 Mode *1. (1) : Normal mode (2) : Overcurrent mode Remark The charger is assumed to charge with a constant current. BATTERY PROTECTION IC FOR 2-SERIAL-CELL PACK Overcurrent detection delay time IOV1 (1) (2) (1) Figure 11 Seiko Instruments Inc. S-8242B Series Overcurrent detection delay time IOV2 (2) (1) 15 ...
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... BATTERY PROTECTION IC FOR 2-SERIAL-CELL PACK www.DataSheet4U.com S-8242B Series 3. Charger Detection V CUn Battery V CLn voltage V DUn V DLn ( pin voltage pin voltage pin voltage CHA Charger connection Load connection *1 Mode *1. (1) : Normal mode (2) : Overdischarge mode Remark The charger is assumed to charge with a constant current ...
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... F 0.022 µ F 1.0 µ Ω 300 Ω Ω Seiko Instruments Inc. S-8242B Series EB EB− Remark Threshold voltage ≤ Overdischarge detection voltage Gate to source withstanding voltage ≥ Charger voltage Threshold voltage ≤ Overdischarge detection voltage Gate to source withstanding voltage ≥ Charger voltage ...
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... BATTERY PROTECTION IC FOR 2-SERIAL-CELL PACK www.DataSheet4U.com S-8242B Series Precautions • The application conditions for the input voltage, output voltage, and load current should not exceed the package power dissipation. • When connecting a battery and the protection circuit, the output voltage of the DO pin (V state) ...
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... BATTERY PROTECTION IC FOR 2-SERIAL-CELL PACK [ [ ° ° C] Seiko Instruments Inc. S-8242B Series − Ta OPE −40 − ° C] − Ta PDN 0.10 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0. −40 − ° ...
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... BATTERY PROTECTION IC FOR 2-SERIAL-CELL PACK www.DataSheet4U.com S-8242B Series − 1.42 1.37 1.32 1.27 1.22 1.17 1.12 1.07 1.02 0.97 0.92 −40 −25 0 − IOV1 DD 0.225 0.220 0.215 0.210 0.205 0.200 0.195 4 5 − IOV2 DD 1.5 1.4 1.3 1.2 1.1 1.0 0 − V 11. t IOV1 DD 10.8 10.4 10.0 9.6 9.2 8.8 8.4 8.0 7.6 7 ° [ ...
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... BATTERY PROTECTION IC FOR 2-SERIAL-CELL PACK [V] DO Seiko Instruments Inc. S-8242B Series − Ta IOV2 0.38 0.36 0.34 0.32 0.30 0.28 0.26 0.24 0.22 −40 − ° C] − V COL CO 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0 ...
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... BATTERY PROTECTION IC FOR 2-SERIAL-CELL PACK www.DataSheet4U.com S-8242B Series Marking Specifications (1) SNT-8A SNT-8A Top view 1 4 Product Name vs. Product Code Product Name S-8242BAB-I8T1G S-8242BAD-I8T1G S-8242BAE-I8T1G S-8242BAH-I8T1G S-8242BAM-I8T1G S-8242BAN-I8T1G S-8242BAO-I8T1G S-8242BAQ-I8T1G S-8242BAR-I8T1G S-8242BAU-I8T1G S-8242BAV-I8T1G S-8242BAW-I8T1G S-8242BAX-I8T1G S-8242BAY-I8T1G S-8242BAZ-I8T1G S-8242BBA-I8T1G S-8242BBB-I8T1G Remark Please contact our sales office for the products with detection voltage value other than those specified above. ...
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... Use of the information described herein for other purposes and/or reproduction or copying without the express permission of Seiko Instruments Inc. is strictly prohibited. The products described herein cannot be used as part of any device or equipment affecting the human body, such as exercise equipment, medical equipment, security systems, gas equipment, or any apparatus installed in airplanes and other vehicles, without prior written permission of Seiko Instruments Inc ...