BATTERY PROTECTION IC FOR 1-CELL PACK

The S-8211D Series are protection ICs for single-cell lithium-ion / lithium-polymer rechargeable batteries and include high-accuracy voltage detectors and delay circuits.

These ICs are suitable for protecting single-cell rechargeable lithium-ion / lithium-polymer battery packs from overcharge, overdischarge, and overcurrent.

Features

(1) High-accuracy voltage detection circuit

• Overcharge detection voltage 3.9 to 4.4 V (5 mV steps)

Accuracy ±25 mV (+25 °C)

Accuracy ±30 mV (−5 to +55 °C)

• Overcharge release voltage 3.8 to 4.4 V*1 Accuracy ±50 mV

• Overdischarge detection voltage 2.0 to 3.0 V (10 mV steps) Accuracy ±50 mV

• Overdischarge release voltage 2.0 to 3.4 V*2 Accuracy ±100 mV

• Discharge overcurrent detection voltage 0.05 to 0.30 V (10 mV steps) Accuracy ±15 mV

• Load short-circuiting detection voltage 0.5 V (fixed) Accuracy ±200 mV

(2) Detection delay times are generated by an internal circuit (external capacitors are unnecessary).

Accuracy ±20

(3) High-withstanding-voltage device is used for charger connection pins (VM pin and CO pin : Absolute maximum rating = 28 V)

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

(5) Shutdown function yes / no are selectable.

(6) Wide operating temperature range −40 to +85 °C

(7) Low current consumption

• Operation mode 3.0 µA typ., 5.5 µA max. (+25 °C)

• Power-down mode 0.2 µA max. (+25 °C)

(8) Small package: SOT-23-5, SNT-6A

(9) Lead-free product

Applications

• Lithium-ion rechargeable battery packs

• Lithium-polymer rechargeable battery packs