EVALUATION KIT AVAILABLE
MAX17201/MAX17205/ Stand-Alone ModelGauge m5 Fuel Gauge
MAX17211/MAX17215 with SHA-256 Authentication
General Description Benefits and Features
The MAX1720x/MAX1721x are ultra-low power stand-alone
ModelGauge m5 Algorithm
fuel gauge ICs that implement the Maxim ModelGauge
Eliminates Error when Approaching Empty Voltage
m5 algorithm without requiring host interaction for configura-
Eliminates Coulomb-Counter Drift
tion. This feature makes the MAX1720x/MAX1721x excellent
Current, Temperature, and Age Compensated
pack-side fuel gauges. The MAX17201/MAX17211 monitor a
Does Not Require Empty, Full, or Idle States
single cell pack. The MAX17205/MAX17215 monitor and bal-
No Characterization Required for EZ Performance
ance a 2S or 3S pack or monitor a multiple-series cell pack.
(See the ModelGauge m5 EZ Performance Section)
Cycle+ Age Forecasting Observes Lifespan
To prevent battery pack cloning, the ICs integrate SHA-
256 authentication with a 160-bit secret key. Each IC
Nonvolatile Memory for Stand-Alone Operation
incorporates a unique 64-bit ID.
Learned Parameters and History Logging
Up to 75 Words Available for User Data
The ModelGauge m5 algorithm combines the short-term
accuracy and linearity of a coulomb counter with the long- Precision Measurement System
term stability of a voltage-based fuel gauge, along with
No Calibration Required
temperature compensation to provide industry-leading
Time-to-Empty and Time-to-Full Estimation
fuel gauge accuracy. The IC automatically compensates
Temperature Measurement
for cell aging, temperature, and discharge rate, and pro-
Die Temperature
vides accurate state of charge (SOC) in milliampere-hours
Up to Two External Thermistors
(mAh) or percentage (%) over a wide range of operating
conditions. As the battery approaches the critical region Multiple Series Cell Pack Operation
near empty, the ModelGauge m5 algorithm invokes a spe-
Low Quiescent Current
cial error correction mechanism that eliminates any error.
MAX172x1: 18A Active, 9A Hibernate
The ICs provide accurate estimation of time-to-empty and
MAX172x5: 25A Active, 12A Hibernate
time-to-full, Cycle+ age forecast, and three methods
Alert Indicator for Voltage, SOC, Temperature,
for reporting the age of the battery: reduction in capacity,
Current, and 1% SOC Change
increase in battery resistance, and cycle odometer.
High-Speed Overcurrent Comparators
The ICs provide precision measurements of current, voltage,
Predicts Remaining Capacity Under Theoretical Load
and temperature. Temperature of the battery pack is mea-
sured using an internal temperature measurement and up to
SHA-256 Authentication
two external thermistors supported by ratiometric measure-
2
Maxim 1-Wire or 2-Wire (I C) Interface
ments on auxiliary inputs. A Maxim 1-Wire (MAX17211/
2 SBS 1.1 Compatible Register Set
MAX17215) or 2-wire I C (MAX17201/MAX17205) inter-
face provides access to data and control registers. The ICs
are available in lead-free, 3mm x 3mm, 14-pin TDFN and
1.6mm x 2.4mm 15-bump WLP packages.
Applications
Smartphones and Tablets
Portable Game Players
Ordering Information appears at end of data sheet.
e-Readers
Digital Still and Video Cameras
Handheld Computers and Terminals
Portable Medical Equipment
ModelGauge and Cycle+ are trademarks and 1-Wire is a regis-
Handheld Radios
tered trademark of Maxim Integrated Products, Inc.
19-8424; Rev 2; 8/16MAX17201/MAX17205/ Stand-Alone ModelGauge m5 Fuel Gauge
MAX17211/MAX17215 with SHA-256 Authentication
Simplified Block Diagram
PACK+
10
VBATT
REG3
0.1F
DQ/SDA
COMMUNICATION
CELL1
INTERFACE
OD/SCL
CELL2
CELLx
+
REG2
0.47F
SINGLE-CELL
MAX17201
EXAMPLE
GND (WLP)
PACK PROTECTOR
CSP EP (TDFN) CSN
PACK-
R
SENSE
Maxim Integrated 2
www.maximintegrated.com