Datasheet > DS2784_12

DS2784_12

更新时间： 2024-09-14 07:16:51

品牌	Logo	应用领域
美信 - MAXIM		电池仪表
页数	文件大小	规格书
43页	607K
描述
1-Cell Stand-Alone Fuel Gauge IC with Li+ Protector and SHA-1 Authentication

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DS2784_12 数据手册

19-4636; Rev 3/12

DS2784

1-Cell Stand-Alone Fuel Gauge IC with

Li+ Protector and SHA-1 Authentication

GENERAL DESCRIPTION

FEATURES

. Precision Voltage, Temperature, and Current

The DS2784 operates from 2.5V to 4.6V for integration

in battery packs using a single lithium-ion (Li+) or Li+

polymer cell. Available capacity is reported in mAh and

as a percentage. Safe operation is ensured with the

included Li+ protection function and SHA-1-based

challenge-response authentication.

Measurement System

. Available Capacity Estimated from Coulomb

Count, Discharge Rate, Temperature, and Cell

Characteristics

. Estimates Cell Aging Using Learn Cycles

. Uses Low-Cost Sense Resistor

Precision measurements of voltage, temperature, and

current, along with cell characteristics and application

parameters are used to estimate capacity. The

available capacity registers report a conservative

estimate of the amount of charge that can be removed

given the current temperature and discharge rate.

. Allows for Calibration of Gain and

Temperature Coefficient

. Li+ Safety Circuitry—Overvoltage,

Undervoltage, Overcurrent, Short-Circuit

Protection

. Programmable Safety Thresholds for

In addition to the nonvolatile (NV) storage for cell

compensation and application parameters, 16 bytes of

EEPROM memory is made available for the exclusive

use of the host system and/or pack manufacturer. This

facilitates battery lot and date tracking or NV storage of

system or battery usage statistics.

Overvoltage and Overcurrent

. Authentication Using SHA-1 Algorithm and

64-Bit Secret

. 32-Byte Parameter EEPROM

. 16-Byte User EEPROM

A 1-Wire^®interface provides serial communication at

16kbps or 143kbps to access data registers, control

registers, and user memory. Additionally, 1-Wire

communication enables challenge-response pack

authentication using SHA-1 as the hash algorithm in a

hash-based message authentication code (HMAC)

authentication protocol.

. Maxim 1-Wire Interface with 64-Bit Unique ID

. Tiny, Pb-Free, 14-Pin TDFN Package Embeds

Easily in Battery Packs Using Thin Prismatic

Cells

PIN CONFIGURATION

VDD

CTG

VSS

VIN

PIO

APPLICATIONS

Smartphones/PDAs

Digital Still and Video Cameras

Cordless VoIP Phones

Portable GPS Navigation

SNS

PAD

PLS

3mm x 5mm TDFN – 14

Top View

Modes and commands are capitalized for clarity.

1-Wire is a registered trademark of Maxim Integrated Products, Inc.

ORDERING INFORMATION

PART

DS2784G+

DS2784G+T&R

TEMP RANGE

-40°C to +85°C

TOP MARK

D2784

PIN PACKAGE

14 TDFN-EP*

D2784

+Denotes a lead(Pb)-free/RoHS-compliant package.

T&R = Tape and reel.

*EP = Exposed pad.

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与DS2784_12相关器件

型号	品牌	获取价格	描述	数据表
DS2784G	MAXIM	获取价格	1-Cell Stand-Alone Fuel Gauge IC with Li+ Protector and SHA-1 Authentication
DS2784G R	MAXIM	获取价格	1-Cell Stand-Alone Fuel Gauge IC with Li+ Protector and SHA-1 Authentication
DS2784G T	MAXIM	获取价格	1-Cell Stand-Alone Fuel Gauge IC with Li+ Protector and SHA-1 Authentication
DS2784G+	MAXIM	获取价格	1-Cell Stand-Alone Fuel Gauge IC with Li+ Protector and SHA-1 Authentication
DS2784G+R	MAXIM	获取价格	1-Cell Stand-Alone Fuel Gauge IC with Li Protector and SHA-1 Authentication
DS2784G+T	MAXIM	获取价格	1-Cell Stand-Alone Fuel Gauge IC with Li Protector and SHA-1 Authentication
DS2784G+T&R	MAXIM	获取价格	1-Cell Stand-Alone Fuel Gauge IC with Li+ Protector and SHA-1 Authentication
DS2784G+TR	MAXIM	获取价格	1-Cell Stand-Alone Fuel Gauge IC with Li+ Protector and SHA-1
DS2786	MAXIM	获取价格	Standalone OCV-Based Fuel Gauge
DS2786	ADI	获取价格	基于OCV的独立式电量计

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