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IC BATT PROT LI-ION 2-5CEL 8WSON
• Small Package Footprint
– 8-pin QFN (3 mm × 4 mm) • 2-, 3-, 4-, and 5-Series Cell Overvoltage
APPLICATIONS • Internal Delay Timer
• Protection in Li-Ion Battery Packs in: • Fixed OVP Threshold
• High-Accuracy Overvoltage Protection: – Power Tools
± 10 mV – UPS Battery Backup
• Low Power Consumption ICC ≈ 1 µA – Light Electric Vehicles (eBike, eScooter,
(VCELL(ALL) < VPROTECT) Pedal Assist Bicycles)
• Low Leakage Current Per Cell Input < 100 nA
The bq7718xy family of products is an overvoltage monitor and protector for Li-Ion battery pack systems. Each
cell is monitored independently for an overvoltage condition.
In the bq7718xy device, an internal delay timer is initiated upon detection of an overvoltage condition on any cell.
Upon expiration of the delay timer, the output is triggered into its active state (either high or low depending on the
configuration). For quicker production-line testing, the bq7718xy device provides a Customer Test Mode with
greatly reduced delay time.
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