Datasheet > DS2775_09

DS2775_09

更新时间： 2024-01-24 17:52:15

品牌	Logo	应用领域
美信 - MAXIM		电池仪表
页数	文件大小	规格书
45页	655K
描述
2-Cell, Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication

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DS2775_09 数据手册

19-4688; Rev 2; 7/09

2-Cell, Stand-Alone, Li+ Fuel-Gauge IC with

Protector and Optional SHA-1 Authentication

56/DS278

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 oper-

ation 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

Precision measurements of voltage, temperature, and

current, along with a cell characteristics table and

application parameters, are used for capacity estima-

tion calculations. The capacity registers report a con-

servative estimate of the amount of charge that can be

removed given the current temperature, discharge rate,

stored charge, and application parameters.

♦ Estimates Cell Aging Between Learn Cycles

♦ Uses Low-Cost Sense Resistor

♦ Allows Calibration of Gain and Temperature

Coefficient

♦ Programmable Thresholds for Overvoltage and

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

direct integration into battery packs with two Li+ or Li-

Poly cells.

Overcurrent

♦ Pack Authentication Using SHA-1 Algorithm

(DS2776/DS2778)

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 statis-

♦ 32-Byte Parameter EEPROM

♦ 16-Byte User EEPROM

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

(DS2775/DS2776)

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

♦ 2-Wire Interface with 64-Bit Unique ID

(DS2777/DS2778) interface provides serial communica-

tion to access measurement and capacity data regis-

ters, 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.

(DS2777/DS2778)

♦ 3mm x 5mm, 14-pin TDFN Lead-Free Package

Ordering Information

PART

DS2775G+

PIN-PACKAGE

14 TDFN-EP*

TOP MARK

D2775

D2776

D2777

D2778

Applications

Low-Cost Notebooks

UMPCs

DS2775G+T&R

DS2776G+

DS776G+T&R

DS2777G+

DSLR Cameras

Video Cameras

DS2777G+T&R

DS2778G+

Commercial and Military Radios

Portable Medical Equipment

DS2778G+T&R

Note: All devices are specified over the -20°C to +70°C oper-

ating temperature range.

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

T&R = Tape and reel.

*EP = Exposed pad.

Selector Guide and Pin Configuration appear at end of data

sheet.

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

________________________________________________________________ Maxim Integrated Products

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

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与DS2775_09相关器件

型号	品牌	获取价格	描述	数据表
DS2775_10	MAXIM	获取价格	2-Cell, Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication
DS2775_11	MAXIM	获取价格	2-Cell, Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication
DS2775G	MAXIM	获取价格	2-Cell, Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication
DS2775G+	MAXIM	获取价格	2-Cell, Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication
DS2775G+TR	MAXIM	获取价格	2-Cell, Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication
DS2775GR	MAXIM	获取价格	2-Cell, Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication
DS2775GT	MAXIM	获取价格	2-Cell, Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication
DS2776	MAXIM	获取价格	2-Cell, Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication
DS2776	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
DS2776G	MAXIM	获取价格	2-Cell, Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication

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