BQ771604 Datasheet, PDF (1/20 Pages) Texas Instruments – Overvoltage Protection for 2-Series to 4-Series Cell Li-Ion Batteries with External Delay Capacitor

bq771600, bq771601, bq771602, bq771604
www.ti.com
SLUSAX0A – DECEMBER 2012 – REVISED SEPTEMBER 2013
Overvoltage Protection for 2-Series to 4-Series Cell Li-Ion Batteries
with External Delay Capacitor
Check for Samples: bq771600, bq771601, bq771602, bq771604
FEATURES
1
• 2-, 3-, and 4-Series Cell Overvoltage Protection
• External Capacitor-Programmed Delay Timer
• Fixed OVP Threshold
• High-Accuracy Overvoltage Protection:
±10 mV
• Low Power Consumption I_CC ≈ 1 µA
(V_CELL(ALL) < V_PROTECT)
• Low Leakage Current Per Cell Input < 100 nA
• Small Package Footprint
– 8-pin QFN (3 mm x 4 mm)
APPLICATIONS
• Power Tools
• UPS Battery Backup
• Light Electric Vehicles
– eBike
– eScooter
– Pedal Assist Bicycles
DESCRIPTION
The bq7716xy 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 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.
For quicker production-line testing, the bq7716xy device provides a Customer Test Mode with greatly reduced
delay time.
VDD 1
V4 2
V3 3
V2 4
8 OUT
7 CD
6 VSS
5 V1
Figure 1. bq7716xy Pinout
1
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
UNLESS OTHERWISE NOTED this document contains
PRODUCTION DATA information current as of publication date.
Products conform to specifications per the terms of Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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