BQ294602DRVR

用于 1 到 3 节锂离子电池且具有 4.35v OVP 的过压保护器件系列

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1 Features

• Single-Cell Overvoltage Monitor for Secondary Protection

• Fixed Programmable Delay Timer

• Fixed Overvoltage Protection (OVP) Threshold

– Available Range of 3.85 V to 4.6 V

• Fixed OVP Delay Option: 4 s or 6.5 s

• High-Accuracy OVP: ± 10 mV

• Low Power Consumption ICC ≈ 1 µA (VCELL(ALL) < VPROTECT)

• Low Leakage Current per Cell Input < 100 nA

• Small Package Footprint

– 6-Pin SON 

2 Applications

• Second-level protection in Li-ion battery packs in:

– Tablets

– Slates

– Portable equipment and instrumentation

3 Description

The BQ2946xx family of products is a secondary-level overvoltage monitor and protector for Li-Ion battery pack systems. The cell is monitored for overvoltage condition and triggers an internal counter once the OVP threshold is exceeded; after a fixed set delay, the out is transitioned to a high level. The output is reset (goes low) if the cell voltage drops below the set threshold minus the hysteresis.