Datasheet > BQ297XY

BQ297XY

更新时间： 2024-10-29 02:42:59

品牌	Logo	应用领域
德州仪器 - TI		/
页数	文件大小	规格书
32页	1964K
描述
BQ297xx Cost-Effective Voltage and Current Protection Integrated Circuit for Single-Cell Li-Ion and Li-Polymer Batteries

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BQ2970, BQ2971, BQ2972, BQ2973

SLUSBU9G –MARCH 2014–REVISED JANUARY 2020

BQ297xx Cost-Effective Voltage and Current Protection Integrated Circuit for Single-Cell

Li-Ion and Li-Polymer Batteries

1 Features

2 Applications

•

Input voltage range pack+: VSS – 0.3 V to 12 V

FET drive:

•

Tablet PCs

Mobile handsets

Handheld data terminals

–

CHG and DSG FET drive output

•

Voltage sensing across external FETs for

overcurrent protection (OCP) is within ±5 mV

(typical)

3 Description

The BQ2970 battery cell protection device provides

an accurate monitor and trigger threshold for

overcurrent protection during high discharge/charge

current operation or battery overcharge conditions.

Fault detection

–

Overcharge detection (OVP)

Over-discharge detection (UVP)

Charge overcurrent detection (OCC)

Discharge overcurrent detection (OCD)

Load short-circuit detection (SCP)

The BQ2970 device provides the protection functions

for li-ion/li-polymer cells, and monitors across the

external power FETs for protection due to high

charge or discharge currents. In addition, there is

overcharge and depleted battery monitoring and

protection. These features are implemented with low

current consumption in NORMAL mode operation.

•

Zero voltage charging for depleted battery

Factory programmed fault protection thresholds

–

Fault detection voltage thresholds

Fault trigger timers

Device Information⁽¹⁾

PART NUMBER

PACKAGE

BODY SIZE (NOM)

Fault recovery timers

BQ2970, BQ2971,

BQ2972, BQ2973⁽²⁾

WSON (6)

1.50 mm × 1.50 mm

•

Modes of operation without battery charger

enabled

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

the end of the data sheet.

–

NORMAL mode I_CC= 4 µA

Shutdown Iq = 100 nA

(2) For available released devices, see the Device Comparison

Table.

•

Operating temperature range T_A= –40°C to

+85°C

Package:

–

6-pin DSE (1.50 mm × 1.50 mm × 0.75 mm)

Simplified Schematic

OCD Detection Accuracy Versus Temperature

PACK+

0.0

œ0.5

œ1.0

œ1.5

œ2.0

œ2.5

œ3.0

œ3.5

œ4.0

V–

330

BAT

VSS

COUT

DOUT

CELLP

CELLN

2.2k

PACK–

CHG

DSG

100

120

œ40

œ20

Temperature (°C)

C012

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.

12 3 4 5 6 7...32

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