Datasheet > BQ28550

BQ28550

更新时间： 2022-03-30 23:39:00

品牌	Logo	应用领域
德州仪器 - TI		电池仪表
页数	文件大小	规格书
33页	582K
描述
bq28550 Single Cell Li-Ion Battery Gas Gauge and Protection

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BQ28550 数据手册

bq28550

www.ti.com

SLUSAJ2 –SEPTEMBER 2011

bq28550 Single Cell Li-Ion Battery Gas Gauge and Protection

Check for Samples: bq28550

FEATURES

–

Undervoltage (Over-Discharge)

Firmware Control of Discharge FET

•

A Comprehensive Single-Cell Li-Ion Battery

Manager Integrates All Essential Functions

•

SHA-1/HMAC Battery Authentication

SMBus Communications Interface

12-pin, 2.5-mm x 4.0-mm SON Package

–

Gas Gauge

Low-Side N-CH FET Protection Control

JEITA/Enhanced Charging

Authentication

APPLICATIONS

•

Tablet PCs

•

Battery Gas Gauge Information

Protection Functions Include:

Slates

Digital Still and Video Cameras

Handheld Terminals

MP3 or Multimedia Players

–

Short-Circuit

Overcurrent Charge and Discharge

Overvoltage Charge (Overcharge)

DESCRIPTION

The Texas Instruments bq28550 battery gas gauge provides current and voltage protection, and secure,

SHA-1/HMAC authentication for single-cell Li-Ion battery packs. Designed for battery-pack integration, the

bq28550 requires host microcontroller firmware support for implementation. A system processor communicates

with the bq28550 using one of the serial interface configurations to obtain remaining battery capacity, system

run-time predictions, and other critical battery information.

The bq28550 uses an accurate gas gauging algorithm to report the status of the cell. The gauge provides

information such as state-of-charge (%), run-time to empty (min.), charge-time to full (min.), battery voltage (V),

and pack temperature (°C).

The bq28550 also features integrated support for secure battery-pack authentication, using the SHA-1/HMAC

authentication algorithm.

12 NC

DOUT

COUT

11 SCL

SDA

bq28550

BAT

SRN

SRP

VREG

VSS

Figure 1. Top View

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

12 3 4 5 6 7...33

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