BQ771600_15 Datasheet, PDF (1/23 Pages) Texas Instruments – External Delay Capacitor

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bq771600, bq771601, bq771602
bq771604, bq771605, bq771611, bq771612
SLUSAX0D – DECEMBER 2012 – REVISED JULY 2015
bq7716xy Overvoltage Protection for 2-Series to 4-Series Cell Li-Ion Batteries
with External Delay Capacitor
1 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 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 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
bq771600
PACKAGE
WSON (8)
BODY SIZE (NOM)
3.00 mm × 4.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet and the Device Comparison Table.
4 Simplified Schematic
CVD
RVD
VDD
V4
V3
OUT
CD
CCD
VSS
V2
V1
RIN
Cell 2
CIN
Cell 1
RIN
CIN
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. UNLESS OTHERWISE NOTED, this document contains PRODUCTION
DATA.