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MAX17201 Datasheet, PDF (1/115 Pages) Maxim Integrated Products – Stand-Alone ModelGauge m5 Fuel Gauge | |||
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MAX17201/MAX17205/
MAX17211/MAX17215
EVALUATION KIT AVAILABLE
Stand-Alone ModelGauge m5 Fuel Gauge
with SHA-256 Authentication
General Description
The MAX1720x/MAX1721x are ultra-low power stand-alone
fuel gauge ICs that implement the Maxim ModelGaugeâ¢
m5 algorithm without requiring host interaction for configura-
tion. This feature makes the MAX1720x/MAX1721x excellent
pack-side fuel gauges. The MAX17201/MAX17211 monitor a
single cell pack. The MAX17205/MAX17215 monitor and bal-
ance a 2S or 3S pack or monitor a multiple-series cell pack.
To prevent battery pack cloning, the ICs integrate SHA-
256 authentication with a 160-bit secret key. Each IC
incorporates a unique 64-bit ID.
The ModelGauge⢠m5 algorithm combines the short-term
accuracy and linearity of a coulomb counter with the long-
term stability of a voltage-based fuel gauge, along with
temperature compensation to provide industry-leading
fuel gauge accuracy. The IC automatically compensates
for cell aging, temperature, and discharge rate, and pro-
vides accurate state of charge (SOC) in milliampere-hours
(mAh) or percentage (%) over a wide range of operating
conditions. As the battery approaches the critical region
near empty, the ModelGauge m5 algorithm invokes a spe-
cial error correction mechanism that eliminates any error.
The ICs provide accurate estimation of time-to-empty and
time-to-full, Cycle+⢠age forecast, and three methods
for reporting the age of the battery: reduction in capacity,
increase in battery resistance, and cycle odometer.
The ICs provide precision measurements of current, voltage,
and temperature. Temperature of the battery pack is mea-
sured using an internal temperature measurement and up to
two external thermistors supported by ratiometric measure-
ments on auxiliary inputs. A Maxim 1-Wire® (MAX17211/
MAX17215) or 2-wire I2C (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
ââ Smartphones and Tablets
ââ Portable Game Players
ââ e-Readers
ââ Digital Still and Video Cameras
ââ Handheld Computers and Terminals
ââ Portable Medical Equipment
ââ Handheld Radios
Benefits and Features
ââ ModelGauge m5 Algorithm
⢠Eliminates Error when Approaching Empty Voltage
⢠Eliminates Coulomb-Counter Drift
⢠Current, Temperature, and Age Compensated
⢠Does Not Require Empty, Full, or Idle States
⢠No Characterization Required for EZ Performance
(See the ModelGauge m5 EZ Performance Section)
⢠Cycle+ Age Forecasting Observes Lifespan
ââ Nonvolatile Memory for Stand-Alone Operation
⢠Learned Parameters and History Logging
⢠Up to 75 Words Available for User Data
ââ Precision Measurement System
⢠No Calibration Required
ââ Time-to-Empty and Time-to-Full Estimation
ââ Temperature Measurement
⢠Die Temperatureâ
⢠Up to Two External Thermistors
ââ Multiple Series Cell Pack Operation
ââ Low Quiescent Current
⢠MAX172x1: 18µA Active, 9µA Hibernate
⢠MAX172x5: 25µA Active, 12µA Hibernate
ââ Alert Indicator for Voltage, SOC, Temperature,
Current, and 1% SOC Change
ââ High-Speed Overcurrent Comparators
ââ Predicts Remaining Capacity Under Theoretical Load
ââ SHA-256 Authentication
ââ Maxim 1-Wire or 2-Wire (I2C) Interface
ââ âSBS 1.1 Compatible Register Set
Ordering Information appears at end of data sheet.
ModelGauge and Cycle+ are trademarks and 1-Wire is a regis-
tered trademark of Maxim Integrated Products, Inc.
19-8424; Rev 2; 8/16
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