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V3

V2

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C

CD

Cell 2

Cell 1

R

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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

3 Description

The bq7716xy device family provides an overvoltage

1

•

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

monitor and protector for Li-Ion battery pack systems.

•

External Capacitor-Programmed Delay Timer

Each

cell

is

monitored

independently

for

an

•

Fixed OVP Threshold

overvoltage condition. For quicker production-line

testing, the bq7716xy device provides a Customer

•

High-Accuracy Overvoltage Protection:

Test Mode with greatly reduced delay time.

±10 mV

•

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

•

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). The external

–

8-pin WSON (3.00 mm × 4.00 mm)

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

2 Applications

overvoltage condition.

•

Power Tools

•

UPS Battery Backup

Table 1. Device Information Table(1)

•

Light Electric Vehicles

PART NUMBER

PACKAGE

BODY SIZE (NOM)

–

eBike

bq771600

WSON (8)

3.00 mm × 4.00 mm

–

eScooter

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

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

–

Pedal Assist Bicycles

4 Simplified Schematic

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.