Datasheet > LTC2941

LTC2941

更新时间： 2022-12-20 23:07:30

品牌	Logo	应用领域
凌特 - Linear		电池仪表
页数	文件大小	规格书
16页	160K
描述
Battery Gas Gauge with I2C Interface

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LTC2941 数据手册

LTC2941

Battery Gas Gauge

with I C Interface

FEATURES

DESCRIPTION

The LTC^®2941 measures battery charge state in battery-

supplied handheld PC and portable product applications.

Its operating range is perfectly suited for single cell Li-Ion

batteries. A precision coulomb counter integrates current

through a sense resistor between the battery’s positive

terminal and the load or charger. The measured charge

Indicates Accumulated Battery Charge and

Discharge

High Accuracy Analog Integration

High Side Sense

1% Charge Accuracy

±±5mꢀ Sense ꢀoltage Range

SMBus/I C Interface

is stored in internal registers. An SMBus/I C interface

accesses and conﬁgures the device.

Conﬁgurable Alert Output/Charge Complete Input

2.7ꢀ to ±.±ꢀ Operating Range

TheLTC2941featuresprogrammablehighandlowthresh-

olds for accumulated charge. If a threshold is exceeded,

the device communicates an alert using either the SMBus

alert protocol or by setting a ﬂag in the internal status

Quiescent Current Less than 155μA

Small 6-Pin 2mm × 3mm DFN package

APPLICATIONS

The LTC2941 requires only a single low value external

sense resistor to set the current range.

L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear

Technology Corporation. All other trademarks are the property of their respective owners.

Low Power Handheld Products

Cellular Phones

MP3 Player

Cameras

GPS

TYPICAL APPLICATION

Total Charge Error vs

Differential Sense Voltage

2.5

CHARGER

LOAD

5.1μF

ꢀ

+ = 3.6ꢀ

SENSE

–

1.±

1.5

SENSE

LTC2941

AL/CC

SDA

SCL

SENSE

155mΩ

I C/SMBus

TO HOST

5.±

1-CELL

Li-Ion

GND

–5.±

–1.5

–1.±

–2.5

2941 TA51a

5.1

155

ꢀ

(mꢀ)

SENSE

2941 TA51b

2941f

12 3 4 5 6 7...16

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