bq771807

www.ti.com BQ7718 SLUSAX1I – DECEMBER 2012 – REVISED JBUQLY72701280 SLUSAX1I – DECEMBER 2012 – REVISED JULY 2020 BQ7718 Overvoltage Protection for 2-Series to 5-Series Cell Li-Ion Batteries with Internal Delay Timer 1 Features 3 Description 2-, 3-, 4-, and 5-series cell overvoltage protection Internal delay timer Fixed OVP threshold High-accuracy overvoltage protection: ± 10 mV Low power consumption ICC ≈ 1 µA (VCELL(ALL) < VPROTECT) Low leakage current per cell input < 100 nA Functional Safety-Capable – Documentation available to aid functional safety system design Package footprint options: – Small 8-pin QFN (3.00 mm × 4.00 mm) – Leaded 8-pin MSOP (3.00 mm × 5.00 mm, including leads) 2 Applications Protection for li-ion battery packs used in: – Handheld garden tools – Handheld power tools – Cordless vacuum cleaners – UPS battery backup – Light electric vehicles (eBike, eScooter, pedal assist bicycles) The BQ7718xy family of products provides an overvoltage monitor and protector for Li-Ion battery pack systems. Each cell is monitored independently for an overvoltage condition. For quicker productionline testing, the BQ7718xy device provides a Customer Test Mode (CTM) with greatly reduced delay time. 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). Dev...