DS2751 Просмотр технического описания (PDF) - Maxim Integrated

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DS2751

Multichemistry Battery Fuel Gauge

Maxim Integrated 

DS2751

ORDERING INFORMATION

PART

MARKING TEMP RANGE

DESCRIPTION

DS2751E

2751E

-20°C to +70°C 8-Pin TSSOP, External Sense Resistor

DS2751E+

2751E

(Note 1)

-20°C to +70°C

8-Pin Lead Free TSSOP, External Sense

Resistor

DS2751E-025

2751R

-20°C to +70°C 8-Pin TSSOP, 25mW Sense Resistor

DS2751E+025

2751R

(Note 1)

-20°C to +70°C

8-Pin Lead Free TSSOP, 25mW Sense

Resistor

DS2751E/T&R

2751E

-20°C to +70°C DS2751E on Tape-and-Reel

DS2751E+T&R

2751E

(Note 1)

-20°C to +70°C DS2751E+ on Tape-and-Reel (Lead Free)

DS2751E-025/T&R

2751R

-20°C to +70°C DS2751E-025 on Tape-and-Reel

DS2751E+025/T&R

2751R

(Note 1)

-20°C to +70°C

DS2751E+025 on Tape-and-Reel (Lead

Free)

Note 1: A “+” will be marked on the package near the Pin 1 indicator.

DESCRIPTION

The DS2751 multichemistry battery fuel gauge is a data-acquisition and information-storage device

tailored for cost-sensitive and space-constrained 1-cell Li+/polymer or 3-cell Ni battery-pack

applications. The DS2751 provides the key hardware components required to accurately estimate

remaining capacity by integrating low-power, precision measurements of temperature, voltage, current,

and current accumulation, as well as nonvolatile (NV) data storage, into the small footprint of a 3.0mm x

4.4mm 8-pin TSSOP package.

Through its 1-Wire interface, the DS2751 gives the host system read/write access to status and control

registers, instrumentation registers, and general-purpose data storage. Each device has a unique factory-

programmed 64-bit net address that allows it to be individually addressed by the host system, supporting

multibattery operation.

The DS2751 performs temperature, voltage, and current measurement to a resolution sufficient to support

process-monitoring applications such as battery charge control and remaining capacity estimation.

Temperature is measured using an on-chip sensor, eliminating the need for a separate thermistor.

Bidirectional current measurement and accumulation are accomplished using either an internal 25mW

sense resistor or an external device. The DS2751 also features a programmable I/O pin that allows the

host system to sense and control other electronics in the pack, including switches, vibration motors,

speakers, and LEDs.

Three types of memory are provided on the DS2751 for battery information storage: EEPROM, lockable

EEPROM, and SRAM. EEPROM memory saves important battery data in true NV memory that is

unaffected by severe battery depletion, accidental shorts, or ESD events. Lockable EEPROM becomes

ROM when locked to provide additional security for unchanging battery data. SRAM provides

inexpensive storage for temporary data.

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