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BQ2946
SLUSAS0E – DECEMBER 2011 – REVISED APRIL 2021
BQ2946xx Single-Cell Protector for Li-Ion Batteries
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.