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BQ7718 SLUSAX1I – DECEMBER 2012 – REVISED JBUQLY72701280
SLUSAX1I – DECEMBER 2012 – REVISED JULY 2020
BQ771...
www.ti.com
BQ7718 SLUSAX1I – DECEMBER 2012 – REVISED JBUQLY72701280
SLUSAX1I – DECEMBER 2012 – REVISED JULY 2020
BQ7718 Over
voltage 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 over
voltage protection Internal delay timer Fixed OVP threshold High-accuracy over
voltage 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 over
voltage monitor and protector for Li-Ion battery pack systems. Each cell is monitored independently for an over
voltage 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 over
voltage 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...