Datasheet > LTC2943

LTC2943

更新时间： 2023-12-20 18:44:34

品牌	Logo	应用领域
亚德诺 - ADI		电池
页数	文件大小	规格书
20页	254K
描述
具温度、电压和电流测量功能的多节电池电量测量芯片

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LTC2943 数据手册

LTC2943

Multicell Battery Gas Gauge

with Temperature, Voltage

and Current Measurement

FEATURES

DESCRIPTION

TheLTC^®2943measuresbatterychargestate,batteryvolt-

age, battery current and its own temperature in portable

product applications. The wide input voltage range allows

usewithmulticellbatteriesupto20V.Aprecisioncoulomb

counterintegratescurrentthroughasenseresistorbetween

the battery’s positive terminal and the load or charger.

Voltage, current and temperature are measured with an

internal 14-bit No Latency ΔΣ™ ADC. The measurements

are stored in internal registers accessible via the onboard

Measures Accumulated Battery Charge and Discharge

3.6V to 20V Operating Range for Multiple Cells

Application

14-Bit ADC Measures Voltage, Current and

Temperature

1% Voltage, Current and Charge Accuracy

±±0mV Sense Voltage Range

High Side Sense

General Purpose Measurements for Any Battery

Chemistry and Capacity

I C/SMBus Interface.

I C/SMBus Interface

TheLTC2943featuresprogrammablehighandlowthresh-

olds for all four measured quantities. If a programmed

threshold is exceeded, the device communicates an alert

using either the SMBus alert protocol or by setting a flag

in the internal status register. The LTC2943 requires only

a single low value sense resistor to set the measured

current range.

Configurable Alert Output/Charge Complete Input

Quiescent Current Less Than 120µA

Small 8-Lead 3mm × 3mm DFN Package

APPLICATIONS

Power Tools

Electric Bicycles

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

No Latency ΔΣ and PowerPath are trademarks of Linear Technology Corporation. All other

trademarks are the property of their respective owners.

Portable Medical Equipment

Video Cameras

TYPICAL APPLICATION

Total Charge Error vs

Differential Sense Voltage

2.0

= 10V

SENSE

CHARGER

LOAD

3.3V

1.5

1.0

1µF

LTC2943

SENSE

2k 2k 2k

0.5

ALCC

SDA

SCL

SENSE

50mΩ

µP

–

SENSE

–0.5

–1.0

–1.5

–2.0

GND

MULTICELL

LI-ION

2943 TA01a

0.1

100

(mV)

SENSE

2943 TA01b

2943fa

For more information www.linear.com/LTC2943

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