One-cell Li-ion Battery Protection IC with High-accuracy Overcurrent Detection Designed for Smartphone and Hearing Aid

Nisshinbo Micro Devices Inc. has introduced the new R5619 Series of one-cell Li-ion / polymer battery protection IC that provides overcharge, overdischarge, and charge/discharge overcurrent detections and is suitable for Smart Phone, Tablet PC, and Hearing aids. Low consumption current and a low standby current of this IC help in achieving a longer driving time with a battery of small capacity. Moreover, major features of this device include charge/discharge overcurrent detectors with high accuracy of ±1.00 mV.

Features

• Supply Current: Normal mode: Typ. 2 µA / Max. 4 µA

• Standby mode: Max.0.2 µA (VDET2: Auto Release type) / Max.0.04 µA (VDET2: Latch type)

• Overcharge detection voltage (VDET1): 4.2 V to 4.7 V, ±10 mV

• Overdischarge detection voltage (VDET2): 2.0 V to 3.2 V, ±35 mV

• Discharge overcurrent detection voltage1 (VDET31): 0.0030 V to 0.0300 V, ±1 mV

• Discharge overcurrent detection voltage2 (VDET32): 0.010 V to 0.100 V, ±2 mV

• Charge overcurrent detection voltage (VDET4): –0.0030 V to –0.0300 V, ±1 mV

• Short-circuit detection voltage (VSHORT1): 0.020 V to 0.150 V, ±4 mV

• 0 V Battery Charging selectable: Permission / Inhibition

• 0 V charging inhibition voltage: 1.000 V to 2.200 V

• Overcharge / Overdischarge Release Voltage Type selectable: Auto Release / Latch

• Discharge Overcurrent Release Voltage Type selectable: Auto Release1(V- = VDD × 0.8V) / Latch

• Discharge Overcurrent Detection2 (VDET32) selectable: Enable / Disable

Applications

• Smart Phone, Tablet PC

• Game, Hearing Aid