BQ294532DRVT datasheet(9/26 Pages) TI1

Part #	BQ294532DRVT

Description	Overvoltage Protection For 2-Series and 3-Series Cell Li-Ion Batteries

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Manufacturer	TI1 [Texas Instruments]

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OUT

V3

V1

V2

VSS

VDD

R VD

CVD

RIN

CIN

VOV

OSC

Delay

Timer

PACK+

PACK–

INT_EN

REG

PWRPAD

9

bq294502, bq294504, bq294512, bq294514

bq294515, bq294522, bq294524, bq294532

bq294533, bq294562, bq294572, bq294582, bq294592

www.ti.com

SLUSAJ3F – SEPTEMBER 2011 – REVISED JUNE 2017

Product Folder Links: bq294502 bq294504 bq294512 bq294514 bq294515 bq294522 bq294524 bq294532

bq294533 bq294562 bq294572 bq294582 bq294592

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8 Detailed Description

8.1 Overview

The bq2945xx is a second-level overvoltage (OV) protector. Each cell is monitored independently by comparing

the actual cell voltage to a protection voltage threshold, VOV. The protection threshold is preprogrammed at the

factory with a range from 3.85 V to 4.65 V.

8.2 Functional Block Diagram

8.3 Feature Description

The voltage sensing for each cell is done independently using a multiplexer. The method of overvoltage detection

is comparing the voltage to an overvoltage protection voltage VOV. Once the voltage exceeds the programmed

fixed value, the delay timer circuit is activated. This delay (tDELAY) is fixed for either a 4-s or 6.5-s delay. When

these conditions are satisfied, the OUT terminal is transitioned to a high level. This output (OUT) is released to a

low condition if all of the cell inputs (Vx) are below the OVP threshold minus the Vhys.

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BQ294532DRVT Datasheet(PDF) 9 Page - Texas Instruments

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