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bq771600, bq771601, bq771602 b...
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Technical Documents
Tools & Software
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bq771600, bq771601, bq771602 bq771604, bq771605, bq771611, bq771612
SLUSAX0D – DECEMBER 2012 – REVISED JULY 2015
bq7716xy Over
voltage Protection for 2-Series to 4-Series Cell Li-Ion Batteries with External Delay Capacitor
1 Features
1 2-, 3-, and 4-Series Cell Over
voltage Protection External Capacitor-Programmed 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 Small Package Footprint
– 8-pin WSON (3.00 mm × 4.00 mm)
2 Applications
Power Tools UPS Battery Backup Light Electric Vehicles
– eBike – eScooter – Pedal Assist Bicycles
3 Description
The bq7716xy device family 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 production-line testing, the bq7716xy device provides a Customer Test Mode with greatly reduced delay time.
In the bq7716xy device, an external 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). The external delay timer feature also includes the ability to detect an open or shorted delay capacitor on the CD pin, which will similarly trigger the output driver i...