Rainbow Electronics MAX17047 - Manual

MAX17047
ModelGauge m3 Fuel Gauge
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Simplified Operating Circuit
19-6008; Rev 0; 9/11
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
ModelGauge is a trademark of Maxim Integrated Products, Inc.
General Description
The MAX17047 incorporates 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 % over a wide range of
operating conditions. The device provides two methods
for reporting the age of the battery: 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 (I 2 C) interface provides access to data and control
registers. The IC is available in a lead(Pb)-free, 3mm x
3mm, 10-pin TDFN package.
Applications
Features
S Accurate Battery-Capacity 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 (I 2 C) Interface
S
Tiny, Lead(Pb)-Free, 3mm x 3mm, 10-Pin TDFN
Package
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
0.1µF 0.1µF
OPTIONAL
10nF
OPTIONAL
10k I
PK-
PK+
T
OPTIONAL
10k I
NTC
THERMISTOR
10m I
RSNS
CSP
REG
AIN SCL
THRM
V
BATT
V
TT
CSN EP
SDA
ALRT
MAX17047
PROTECTION
SYSTEM BATTERY PACK
HOST
µP
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.