Datasheet > BQ29737DSET

BQ29737DSET

更新时间： 2024-10-29 02:43:43

品牌	Logo	应用领域
德州仪器 - TI		/
页数	文件大小	规格书
34页	1924K
描述
BQ297xx Cost-Effective Voltage and Current Protection Integrated Circuit for Single-Cell Li-Ion and Li-Polymer Batteries

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BQ29737DSET 数据手册

BQ2970, BQ2971, BQ2972, BQ2973

SLUSBU9H – MARCH 2014 – REVISED JUNE 2021

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:

– CHG and DSG FET drive output

Voltage sensing across external FETs for

overcurrent protection (OCP) is within ±5 mV

(typical)

•

Tablet PCs

Mobile handsets

Handheld data terminals

•

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)

Zero voltage charging for depleted battery

Factory programmed fault protection thresholds

– Fault detection voltage thresholds

– Fault trigger timers

– Fault recovery timers

Modes of operation without battery charger

enabled

– NORMAL mode I_CC= 4 µA

– Shutdown Iq = 100 nA

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.

•

Device Information

•

PART NUMBER

PACKAGE⁽¹⁾

BODY SIZE (NOM)

BQ2970, BQ2971,

BQ2972, BQ2973

WSON (6)

1.50 mm × 1.50 mm

•

Operating temperature range T_A= –40°C to +85°C

Package:

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

the end of the data sheet.

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

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

Simplified Schematic

100

120

œ40

œ20

Temperature (°C)

C012

OCD Detection Accuracy Versus Temperature

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. PRODUCTION DATA.

12 3 4 5 6 7...34

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