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SLUSB15H – SEPTEMBER 2012 – REVISED FEBRUARY 2018 bq2947 Overvoltage Protection for 2-Series to 4-Series Cell Li-Ion Batteries
with External Delay Capacitor
1 Features 3 Description The bq2947 family is an overvoltage monitor and
protector for Li-Ion battery pack systems. Each cell is
monitored independently for an overvoltage condition. 1 2-, 3-, and 4-Series Cell Overvoltage Protection
External Capacitor-Programmed Delay Timer
Factory Programmed OVP Threshold (Threshold
Range 3.85 V to 4.6 V)
Output Options: Active High or Open Drain Active
Low
High-Accuracy Overvoltage Protection: В±10 mV
Low Power Consumption ICC ≈ 1 µA
(VCELL(ALL) < VPROTECT)
Low Leakage Current Per Cell Input < 100 nA
Small Package Footprint
– 8-Pin WSON (2.00 mm x 2.00 mm) In the bq2947 device, an external delay timer is
initiated upon detection of an overvoltage condition …