MAX17047/MAX17050 1-Cell Fuel Gauge with ModelGauge m3
General Description Features
The MAX17047/MAX17050 incorporate the Maxim Accurate Battery-Capacity and Time-To-Empty
ModelGauge m3 algorithm that combines the excellent Estimation
short-term accuracy and linearity of a coulomb counter Temperature, Age, and Rate Compensated
with the excellent long-term stability of a voltage-based fuel Does Not Require Empty, Full, or Idle States to
gauge, along with temperature compensation to provide Maintain Accuracy
industry-leading fuel-gauge accuracy. ModelGauge m3
Precision Measurement System
cancels offset accumulation error in the coulomb counter,
No Calibration Required
while providing better short-term accuracy than any purely
ModelGauge m3 Algorithm
voltage-based fuel gauge. Additionally, the ModelGauge
Long-Term Influence by Voltage Fuel Gauge
m3 algorithm does not suffer from abrupt corrections that
Cancels Coulomb-Counter Drift
normally occur in coulomb-counter algorithms, since tiny
Short-Term Influence by Coulomb Counter
continual corrections are distributed over time.
Provides Excellent Linearity
The device automatically compensates for aging, temper-
Adapts to Cell Characteristics
ature, and discharge rate and provides accurate state of
External Temperature-Measurement Network
charge (SOC) in mAh or %, as well as time-to-empty over
Actively Switched Thermistor Resistive Divider
a wide range of operating conditions. The device provides
Reduces Current Consumption
two methods for reporting the age of the battery: reduction
Low Quiescent Current
in capacity and cycle odometer.
25A Active, < 0.5A Shutdown
The device provides precision measurements of current,
voltage, and temperature. Temperature of the battery
Alert Indicator for SOC, Voltage, Temperature, and
pack is measured using an external thermistor supported
Battery Removal/Insertion Events
by ratiometric measurements on an auxiliary input. A
AtRate Estimation of Remaining Capacity
2
2-wire (I C) interface provides access to data and control
2
2-Wire (I C) Interface
registers. The MAX17047 is available in a lead(Pb)-free,
3mm x 3mm, 10-pin TDFN package. The MAX17050 is
Tiny, Lead(Pb)-Free, 3mm x 3mm, 10-Pin TDFN
available in a 0.4mm pitch 9-bump WLP package.
Package or Tiny 0.4mm Pitch 9-Bump WLP Package
Applications
Smartphones, Tablets Medical Devices
Health and Fitness Handheld Computers
Ordering Information appears at end of data sheet.
Monitors and Terminals
Digital Still, Video and Wireless Speakers
Action Cameras
Simple Fuel-Gauge Circuit Diagram
BATTERY PACK SYSTEM
V
TT
PK+
(MAX17047 ONLY)
V
BATT
ALRT
THRM
SDA HOST
OPTIONAL
MAX17047
P
10k
MAX17050
T AIN SCL
REG
OPTIONAL
PROTECTION
10k CSP EP CSN
OPTIONAL
0.1F 0.1F
NTC
10nF
10m
THERMISTOR
RSNS
PK-
ModelGauge is a trademark of Maxim Integrated Products, Inc.
19-6008; Rev 7; 11/16MAX17047/MAX17050 1-Cell Fuel Gauge with ModelGauge m3
Absolute Maximum Ratings
V , SDA, SCL, ALRT to CSP ............................-0.3V to +6V Continuous Power Dissipation (T = +70C)
BATT A
REG to CSP .........................................................-0.3V to +2.2V TDFN (derate 24.4mW/C above +70C) ...............1951.2mW
V to CSP ..............................................................-0.3V to +6V WLP (derate 11.9mW/C above +70C) ...................952.0mW
TT
THRM, AIN to CSP ....................................-0.3V to (V + 0.3V) Operating Temperature Range ........................... -40C to +85C
TT
CSN to CSP ...............................................................-2V to +2V Junction Temperature ......................................................+150C
Continuous Sink Current (V ) ..........................................20mA Storage Temperature Range ............................ -55C to +125C
TT
Continuous Sink Current (SCL, SDA, ALRT) .....................20mA Lead Temperature (soldering 10s) ..................................+300C
Soldering Temperature (reflow) .......................................+260C
Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these
or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect
device reliability.
(Note 1)
Package Thermal Characteristics
TDFN WLP
Junction-to-Ambient Thermal Resistance ( ) ..........41C/W Junction-to-Ambient Thermal Resistance ( ) ..........84C/W
JA JA
Junction-to-Case Thermal Resistance ( ) .................9C/W
JC
Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer
board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial.
Electrical Characteristics
(V = 2.5V to 4.5V, T = -20C to +70C, unless otherwise noted. Typical values are at T = +25C.) (Note 2)
BATT A A
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Supply Voltage V (Note 3) 2.5 4.5 V
BATT
I Shutdown mode, T +50C 0.5 2
DD0 A
Supply Current A
I Active mode, average current 25 42
DD1
REG Regulation Voltage V 1.5 1.9 V
REG
T = +25C -7.5 +7.5
A
Measurement Error, V V mV
BATT GERR
-20 +20
Measurement Resolution, V V 0.625 mV
BATT LSb
V Measurement Range V 2.5 4.98 V
BATT FS
Input Resistance CSN, AIN 15 M
Ratiometric Measurement
T -0.5 +0.5 %
GERR
Accuracy, AIN
Ratiometric Measurement % Full
T 0.0244
LSb
Resolution, AIN Scale
Current Register Resolution I 1.5625 V
LSb
Current Full-Scale Magnitude I 51.2 mV
FS
Current Offset Error I 1.5 V
OERR
% of
Current Gain Error I -1 +1
GERR
Reading
V = 3.6V at T = +25C -1 +1
DD A
Time-Base Accuracy t T = 0C to +50C -2.5 +2.5 %
ERR A
T = -20C to +70C -3.5 +3.5
A
Maxim Integrated 2
www.maximintegrated.com