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LTC2943CDD#PBF

Description
Multi-cell battery power measurement chip with temperature, voltage and current measurement functions
CategoryPower/power management    The power supply circuit   
File Size493KB,12 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Environmental Compliance
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LTC2943CDD#PBF Overview

Multi-cell battery power measurement chip with temperature, voltage and current measurement functions

LTC2943CDD#PBF Parametric

Parameter NameAttribute value
Brand NameLinear Technology
Is it Rohs certified?conform to
MakerLinear ( ADI )
Parts packaging codeDFN
package instructionHVSON,
Contacts8
Manufacturer packaging codeDD
Reach Compliance Codecompliant
ECCN codeEAR99
Samacsys DescriptionMulticell Battery Gas Gauge with Temperature, Voltage and Current Measurement
Adjustable thresholdYES
Analog Integrated Circuits - Other TypesPOWER SUPPLY SUPPORT CIRCUIT
JESD-30 codeS-PDSO-N8
JESD-609 codee3
length3 mm
Humidity sensitivity level1
Number of channels1
Number of functions1
Number of terminals8
Maximum operating temperature70 °C
Minimum operating temperature
Package body materialPLASTIC/EPOXY
encapsulated codeHVSON
Package shapeSQUARE
Package formSMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE
Peak Reflow Temperature (Celsius)NOT SPECIFIED
Maximum seat height0.8 mm
Maximum supply voltage (Vsup)20 V
Minimum supply voltage (Vsup)3.6 V
Nominal supply voltage (Vsup)10 V
surface mountYES
technologyCMOS
Temperature levelCOMMERCIAL
Terminal surfaceMatte Tin (Sn)
Terminal formNO LEAD
Terminal pitch0.5 mm
Terminal locationDUAL
Maximum time at peak reflow temperatureNOT SPECIFIED
width3 mm
DEMO MANUAL DC1812A
LTC2943/LTC2943-1/LTC2944
Multicell Battery Gas Gauge with Temperature,
Voltage and Current Measurement
Description
Demonstration circuit 1812A-A (Figure 1) features the
LTC
®
2943.
Demonstration circuit 1812A-B features the
LTC2944.
Demonstration circuit 1812A-C features the
LTC2943-1.
The LTC2943/LTC2943-1 has an operating
range of 3.6V to 20V, while the LTC2944 has an operating
range of 3.6V to 60V, making all three devices perfectly
suited for multicell battery applications. A precision analog
coulomb counter integrates current measured through a
sense resistor between the battery’s positive terminal and
the load or charger. The LTC2943/LTC2943-1 measures
voltage, current and temperature with an internal 14-bit
No Latency ∆∑™ ADC. The LTC2944 measures voltage,
current and temperature with an internal 16-bit No Latency
∆∑ ADC. The measurements are stored in internal registers
accessible via the onboard SMBus/I
2
C interface.
The LTC2943/LTC2943-1/LTC2944 has programmable
high and low thresholds for all measured quantities. If a
programmed threshold is exceeded, the device reports an
alert using either the SMBus alert protocol or by setting a
flag in the internal status register.
The LTC2943 and LTC2944 require only a single low
value sense resistor to set the measured current range.
The LTC2943-1, however, has an integrated sense resistor
of 50mΩ which sets the maximum current measurement
to 1A. The default value assembled on the DC1812A-A and
DC1812A-B is 100mΩ for a maximum current measure-
ment of 500mA. The DC1812A-C which showcases the
LTC2943-1 has the onboard sense resistor omitted in favor
of the integrated 50mΩ sense resistor. All three parts have
a software-configurable charge complete/alert pin. When
the pin is set for charge complete, a jumper connects
the pushbutton which simulates a logic low input at the
AL/CC
pin. This sets the ACR register to FFFFh which
indicates a full battery. When the pin is configured for
alert, the same jumper is used to connect a red LED that
indicates an alert is present.
The DC1812A is a part of the QuikEval™ system for quick
evaluation with a host controller through a PC using the
DC590 or DC2026.
Design files for this circuit board are available at
http://www.linear.com/demo/DC1812A
L,
LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and No
Latency ∆∑ and QuikEval are trademarks of Linear Technology Corporation. All other trademarks
are the property of their respective owners.
Figure 1. DC1812A
dc1812afa
1

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