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bq771800, bq771801, bq771802

bq771803, bq771807, bq771808

bq771809, bq771815

SLUSAX1D – DECEMBER 2012 – REVISED NOVEMBER 2014

bq7718xy Overvoltage Protection for 2-Series to 5-Series Cell Li-Ion Batteries

with Internal Delay Timer

1 Features

3 Description

The

bq7718xy

family

of

products

provides

an

1

•

2-, 3-, 4-, and 5-Series Cell Overvoltage

overvoltage monitor and protector for Li-Ion battery

Protection

pack systems. Each cell is monitored independently

•

Internal Delay Timer

for an overvoltage condition. For quicker production-

•

Fixed OVP Threshold

line

testing,

the

bq7718xy

device

provides

a

Customer Test Mode (CTM) with greatly reduced

•

High-Accuracy Overvoltage Protection:

delay time.

± 10 mV

In the bq7718xy device, an internal delay timer is

•

initiated upon detection of an overvoltage condition

on any cell. Upon expiration of the delay timer, the

•

Low Leakage Current Per Cell Input < 100 nA

output is triggered into its active state (either high or

•

Small Package Footprint

low depending on the configuration).

–

8-pin QFN (3.00 mm × 4.00 mm)

Device Information Table(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

2 Applications

bq771800

QFN (8)

3.00 mm × 4.00 mm

•

Protection in Li-Ion Battery Packs in:

(1) For all available packages, see the orderable addendum at

–

Power Tools

the end of the data sheet and the Device Comparison Table.

–

UPS Battery Backup

–

Light Electric Vehicles (eBike, eScooter, Pedal

Assist Bicycles)

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.