S-8242B Просмотр технического описания (PDF) - Seiko Instruments Inc

Номер в каталоге

Компоненты Описание

производитель

S-8242B

BATTERY PROTECTION IC FOR 2-SERIAL-CELL PACK

Seiko Instruments Inc 

Rev.1.4_00

BATTERY PROTECTION IC

FOR 2-SERIAL-CELL PACK

S-8242B Series

The S-8242B Series are protection ICs for 2-serial-cell

lithium-ion/lithium polymer rechargeable batteries and

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.

„ Features

(1) High-accuracy voltage detection for each cell

• Overcharge detection voltage n (n = 1, 2)

• Overcharge release voltage n (n = 1, 2)

3.9 V to 4.5 V (50 mV steps)

3.8 V to 4.5 V*1

Accuracy ±25 mV

Accuracy ±50 mV

• Overdischarge detection voltage n (n = 1, 2)

• Overdischarge release voltage n (n = 1, 2)

2.0 V to 3.0 V (100 mV steps)

2.0 V to 3.4 V*2

Accuracy ±50 mV

Accuracy ±100 mV

*1. Overcharge release voltage = Overcharge detection voltage − Overcharge hysteresis voltage

(Overcharge hysteresis voltage n (n = 1, 2) can be selected as 0 V or from a range of 0.1 V to

0.4 V in 50 mV steps.)

*2. Overdischarge release voltage = Overdischarge detection voltage + Overdischarge hysteresis voltage

(Overdischarge hysteresis voltage n (n = 1, 2) can be selected as 0 V or from a range of 0.1 V to

0.7 V in 100 mV steps.)

(2) Two-level overcurrent detection (overcurrent 1, overcurrent 2)

• Overcurrent detection voltage 1

0.05 V, 0.08 V to 0.30 V (10 mV steps)

Accuracy ±15 mV

• Overcurrent detection voltage 2

1.2 V (fixed)

Accuracy ±300 mV

(3) Delay times (overcharge, overdischarge, overcurrent) are generated by an internal circuit (external capacitors are

unnecessary).

(4) 0 V battery charge function available/unavailable are selectable.

(5) Charger detection function

• The overdischarge hysteresis is released by detecting negative voltage at the VM pin (−0.7 V typ.) (Charger

detection function).

(6) High-withstanding-voltage devices

Absolute maximum rating: 28 V

(7) Wide operating temperature range

−40°C to +85 °C

(8) Low current consumption

Operation mode

10 µA max. (+25°C)

Power-down mode

0.1 µA max. (+25°C)

(9) Small package

SNT-8A, 8-Pin TSSOP

(10) Lead-free products

„ Applications

• Lithium-ion rechargeable battery packs

• Lithium polymer rechargeable battery packs

„ Packages

Package Name

SNT-8A

8-Pin TSSOP

Package

PH008-A

FT008-A

Drawing Code

Tape

Reel

PH008-A

PH008-A

FT008-E

FT008-E

Land

PH008-A



Seiko Instruments Inc.

1

Share Link: