Datasheet > DS2777

DS2777

更新时间： 2023-12-20 18:45:43

品牌	Logo	应用领域
亚德诺 - ADI		电池
页数	文件大小	规格书
46页	1550K
描述
2节电池电量计，带FuelPack算法、保护器和SHA-1安全认证

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中文翻译

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数据手册

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DS2777 数据手册

DS2775/DS2776/

DS2777/DS2778

2-Cell, Fuel Gauge with FuelPack,

Protector, and SHA-1 Authentication

General Description

Features

The DS2775–DS2778 report available capacity for

rechargeable lithium-ion (Li+) and Li+ polymer (Li-Poly)

batteries in mAh and as a percentage of full. Safe

operation is ensured by the integrated Li+ protector.

The DS2776/DS2778 support SHA-1-based challenge-

response authentication in addition to all other DS2775/

DS2777 features.

● High-Side nFET Drivers and Protection Circuitry

● Precision Voltage, Temperature, and Current

Measurement System

● Cell-Capacity Estimation from Coulomb

Count, Discharge Rate, Temperature, and Cell

Characteristics

● Estimates Cell Aging Between Learn Cycles

● Uses Low-Cost Sense Resistor

Precision measurements of voltage, temperature, and

current, along with a cell characteristics table and applica-

tion parameters, are used for capacity estimation calcula-

tions. The capacity registers report a conservative esti-

mate of the amount of charge that can be removed given

the current temperature, discharge rate, stored charge,

and application parameters.

● Allows Calibration of Gain and Temperature

Coefficient

● Programmable Thresholds for Overvoltage and

Overcurrent

● Pack Authentication Using SHA-1 Algorithm

The DS2775–DS2778 operate from +4.0V to +9.2V

for direct integration into battery packs with two Li+ or

Li- Poly cells.

(DS2776/DS2778)

● 32-Byte Parameter EEPROM

● 16-Byte User EEPROM

In addition to nonvolatile storage for cell compensation

and application parameters, the DS2775–DS2778 offer

16 bytes of EEPROM for use by the host system and/or

pack manufacturer to store battery lot and date tracking

information. The EEPROM can also be used for non-

volatile storage of system and/or battery usage statistics.

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

(DS2775/DS2776)

● 2-Wire Interface with 64-Bit Unique ID

(DS2777/DS2778)

● 3mm x 5mm, 14-Pin TDFN Lead-Free Package

A Maxim 1-Wire (DS2775/DS2776) or 2-wire (DS2777/

DS2778) interface provides serial communication to

access measurement and capacity data registers, control

registers, and user memory. The DS2776/DS2778 use

the SHA-1 hash algorithm in a challenge-response pack

authentication protocol for battery-pack verification.

DS2775/DS2776 Simple Fuel Gauge

Circuit Diagram

Applications

PK+

● Health and Fitness Monitors

● Digital Still, Video, and Action Cameras

● Medical Devices

● Handheld Computers and Terminals

● Handheld Radios

1kΩ

150Ω

1kΩ

470Ω

1kΩ

SRC

PLS

IN2

IN1

150Ω

DATA

1kΩ

DS2775

DS2776

PIO

● Home and Building Automation, Sensors

● Smart Batteries

0.47µF

5.1V

SNS

OVD

0.1µF

SRC

● Power Tools

SNS

PK-

Ordering Information appears at end of data sheet.

Selector Guide appears at end of data sheet.

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

19-4688; Rev 5; 2/17

12 3 4 5 6 7...46

中文翻译

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与DS2777相关器件

型号	品牌	获取价格	描述	数据表
DS2777G	MAXIM	获取价格	2-Cell, Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication
DS2777G+	MAXIM	获取价格	2-Cell, Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication
DS2777G+T&R	MAXIM	获取价格	Power Supply Support Circuit, Adjustable, 1 Channel, TDFN-14
DS2777G+TR	MAXIM	获取价格	2-Cell, Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication
DS2777GR	MAXIM	获取价格	2-Cell, Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication
DS2777GT	MAXIM	获取价格	2-Cell, Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication
DS2778	MAXIM	获取价格	2-Cell, Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication
DS2778	ADI	获取价格	2节电池电量计，带FuelPack算法、保护器和SHA-1安全认证
DS2778G	MAXIM	获取价格	2-Cell, Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication
DS2778G+	MAXIM	获取价格	2-Cell, Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication

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