bq7716xy Overvoltage Protection for 2-Series to 4-Series Cell Li-Ion Batteries with External Delay Capacitor (Rev. D)
SLUSAX0D – December2012 – revisedJuly 2015
UNLESS OTHERWISE NOTED, this document contains PRODUCTION DATA.
- 2-, 3-, and 4-Series Cell Overvoltage Protection
- External Capacitor-Programmed Delay Timer
- Fixed OVP Threshold
- High-Accuracy Overvoltage Protection:
- Low Power Consumption ICC ≈ 1 µA
(VCELL(ALL) < VPROTECT)
- Low Leakage Current Per Cell Input < 100 nA
- Small Package Footprint
- Power Tools
- UPS Battery Backup
- Light Electric Vehicles
- Pedal Assist Bicycles
The bq7716xy device family provides an overvoltage monitor and protector for Li-Ion battery pack systems. Each cell is monitored independently for an overvoltage 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 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). 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 in an overvoltage condition.
Table 1. Device Information Table(1)
|PART NUMBER||PACKAGE||BODY SIZE (NOM)|
|bq771600||WSON (8)||3.00 mm × 4.00 mm|
- For all available packages, see the orderable addendum at the end of the data sheet and the Device Comparison Table.
4 Simplified Schematic
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