MAX17047 Datasheet, PDF (1/47 Pages) Maxim Integrated Products – ModelGauge m3 Fuel Gauge

19-6008; Rev 2; 4/12
MAX17047/MAX17050
ModelGauge m3 Fuel Gauge
General Description
The MAX17047/MAX17050 incorporate the Maxim
ModelGauge™ m3 algorithm that combines the excellent
short-term accuracy and linearity of a coulomb counter
with the excellent long-term stability of a voltage-based fuel
gauge, along with temperature compensation to provide
industry-leading fuel-gauge accuracy. ModelGauge m3
cancels offset accumulation error in the coulomb counter,
while providing better short-term accuracy than any purely
voltage-based fuel gauge. Additionally, the ModelGauge
m3 algorithm does not suffer from abrupt corrections that
normally occur in coulomb-counter algorithms, since tiny
continual corrections are distributed over time.
The device automatically compensates for aging, tem-
perature, and discharge rate and provides accurate state
of charge (SOC) in mAh or %, as well as time-to-empty
over a wide range of operating conditions. The device
provides two methods for reporting the age of the bat-
tery: reduction in capacity and cycle odometer.
The device provides precision measurements of current,
voltage, and temperature. Temperature of the battery
pack is measured using an external thermistor supported
by ratiometric measurements on an auxiliary input. A
2-wire (I²C) interface provides access to data and control
registers. The MAX17047 is available in a lead(Pb)-free,
3mm x 3mm, 10-pin TDFN package. The MAX17050 is
available in a 0.4mm pitch 9-bump WLP package.
Applications
2.5G/3G/4G Wireless
Handsets
Smartphones/PDAs
Tablets and Handheld
Computers
Portable Game Players
e-Readers
Digital Still and Video
Cameras
Portable Medical Equipment
Features
S Accurate Battery-Capacity and Time-To-Empty
Estimation
 Temperature, Age, and Rate Compensated
 Does Not Require Empty, Full, or Idle States to
Maintain Accuracy
S Precision Measurement System
 No Calibration Required
S ModelGauge m3 Algorithm
 Long-Term Influence by Voltage Fuel Gauge
Cancels Coulomb-Counter Drift
 Short-Term Influence by Coulomb Counter
Provides Excellent Linearity
 Adapts to Cell Characteristics
S External Temperature-Measurement Network
 Actively Switched Thermistor Resistive Divider
Reduces Current Consumption
S Low Quiescent Current
 25µA Active, < 0.5µA Shutdown
S Alert Indicator for SOC, Voltage, Temperature, and
Battery Removal/Insertion Events
S AtRate Estimation of Remaining Capacity
S 2-Wire (I²C) Interface
S Tiny, Lead(Pb)-Free, 3mm x 3mm, 10-Pin TDFN
Package or Tiny 0.4mm Pitch 9-Bump WLP Package
Ordering Information appears at end of data sheet.
For related parts and recommended products to use with this part,
refer to: www.maxim-ic.com/MAX17047.related
Simplified Operating Circuit
BATTERY PACK
PK+
THRM
V_BATT
SYSTEM
VTT
(MAX17047 ONLY)
ALRT
PROTECTION
OPTIONAL
10kI
T
OPTIONAL
10kI
NTC
THERMISTOR
PK-
OPTIONAL
10nF
0.1µF
AIN
REG
0.1µF
SDA
MAX17047
MAX17050
SCL
CSP EP CSN
10mI
RSNS
HOST
µP
ModelGauge is a trademark of Maxim Integrated Products, Inc.
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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.