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Stand-Alone ModelGauge m5 Fuel Gauge with SHA-256 Authentication

Industry's First Stand-Alone ModelGauge m5 Fuel Gauge with SHA-256 Authentication

Product Details

The MAX1720x/MAX1721x are ultra-low power stand-alone fuel gauge ICs that implement the Maxim ModelGauge m5 algorithm without requiring host interaction for configuration. This feature makes the MAX1720x/MAX1721x excellent pack-side fuel gauges. The MAX17201/MAX17211 monitor a single cell pack. The MAX17205/MAX17215 monitor and balance 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 provides 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 special 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 measured using an internal temperature measurement and up to two external thermistors supported by ratiometric measurements on auxiliary inputs. A Maxim 1-Wire® (MAX17211/MAX17215) or 2-wire I2C (MAX17201/MAX17205) interface provides access to data and control registers. The ICs are available in lead-free, 3mm × 3mm, 14-pin TDFN and 1.6mm × 2.4mm 15-bump WLP packages.

Design Solution: Advanced Battery Management for the Rest of Us ›


How to Prevent Battery Cloning Using the MAX17211EVKIT

Key Features

  • 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
  • Nonvolatile Memory for Stand-Alone Operation
    • Learned Parameters and History Logging
    • Up to 75 Words Available for User Data
  • Precision Measurement System
    • No Calibration Required
  • Time-to-Empty and Time-to-Full Estimation
  • Temperature Measurement
    • Die Temperature
    • Up to Two External Thermistors
  • Multiple Series Cell Pack Operation
  • Low Quiescent Current
    • MAX172x1: 18µA Active, 9µA Hibernate
    • MAX172x5: 25µA Active, 12µA Hibernate
  • Alert Indicator for Voltage, SOC, Temperature, Current, and 1% SOC Change
  • High-Speed Overcurrent Comparators
  • Predicts Remaining Capacity Under Theoretical Load
  • SHA-256 Authentication
  • Maxim 1-Wire or 2-Wire (I2C) Interface
  • SBS 1.1 Compatible Register Set

Applications/Uses

  • Digital Still and Video Cameras
  • e-Readers
  • Handheld Computers and Terminals
  • Handheld Radios
  • Portable Game Players
  • Portable Medical Equipment
  • Smartphones and Tablets
Parametric specs for Battery ID and Authentication
Functions Fuel Gauge
SHA-256 Authentication
Status Monitor
Interface 2-Wire
User Data Storage (bits) 1248 NVM
VSUPPLY (V) 4.2 to 20
Package/Pins TDFN-CU/14
WLP/15
Oper. Temp. (°C) -40 to +85
Budgetary
Price (See Notes)
$1.76 @1k
Parametric specs for Battery Fuel Gauges, Protectors, and Monitors
Functions Fuel Gauge
Battery Type Multi-Cell Li-Ion
Fuel Gauge Algorithm ModelGauge m5
Interface 2-Wire
User Data Storage (Bytes) 156 NVM
Parameters Measured Current
State of Charge
Temperature
Time
Voltage
Applications Host
Pack
VSUPPLY (V) (min) 4.2
VSUPPLY (V) (max) 20
Package/Pins TDFN-CU/14
WLP/15
Oper. Temp. (°C) -
View More

Simplified Block Diagram

MAX17201, MAX17205, MAX17211, MAX17215: Functional Diagram Ultra-low power stand-alone fuel gauge ICs that implement the Maxim ModelGauge™ m5 algorithm | Functional Diagram Zoom icon

Design & Development

Click any title below to view the detail page where available.

Description

The MAX17201G/MAX17201X/MAX17211G/MAX17211X evaluation kits (EV kits) are fully assembled and tested surface-mount PCBs that evaluate the stand-alone ModelGauge™ m5 pack-side fuel-gauge ICs for lithiumion (Li+) batteries in handheld and portable equipment. The MAX17201 and MAX17211 are for single-cell applications. See the MAX17205 and MAX17215 for multicell applications.

The MAX17201G/MAX17201X/MAX17211G/MAX17211X EV kits include the Maxim DS91230+ USB interface, IC evaluation board, and RJ-11 connection cable. Windows® based graphical user interface (GUI) software is available for use with the EV kit and can be downloaded from Maxim’s website at http://www.maximintegrated.com/products/MAX17201 (under the Design Resources tab). Windows 7 or newer Windows operating system is required to use with the EV kit GUI software.

View Details

Features

  • ModelGauge m5 Algorithm
  • Nonvolatile Memory Configured for Stand-Alone Operation
  • Monitors from 1S Cell Packs
  • Battery Pack Input Voltage Range of +2.1V to +4.9V per Cell
  • Thermistor Measurement Network
  • Optional On-Board PCB Trace Sense Resistor
  • Windows 7 or Newer Compatible Software
  • Proven PCB Layout
  • Fully Assembled and Tested

Description

The MAX17201G/MAX17201X/MAX17211G/MAX17211X evaluation kits (EV kits) are fully assembled and tested surface-mount PCBs that evaluate the stand-alone ModelGauge™ m5 pack-side fuel-gauge ICs for lithiumion (Li+) batteries in handheld and portable equipment. The MAX17201 and MAX17211 are for single-cell applications. See the MAX17205 and MAX17215 for multicell applications.

The MAX17201G/MAX17201X/MAX17211G/MAX17211X EV kits include the Maxim DS91230+ USB interface, IC evaluation board, and RJ-11 connection cable. Windows® based graphical user interface (GUI) software is available for use with the EV kit and can be downloaded from Maxim’s website at http://www.maximintegrated.com/products/MAX17201 (under the Design Resources tab). Windows 7 or newer Windows operating system is required to use with the EV kit GUI software.

View Details

Features

  • ModelGauge m5 Algorithm
  • Nonvolatile Memory Configured for Stand-Alone Operation
  • Monitors from 1S Cell Packs
  • Battery Pack Input Voltage Range of +2.1V to +4.9V per Cell
  • Thermistor Measurement Network
  • Optional On-Board PCB Trace Sense Resistor
  • Windows 7 or Newer Compatible Software
  • Proven PCB Layout
  • Fully Assembled and Tested

Description

The MAX17201G/MAX17201X/MAX17211G/MAX17211X evaluation kits (EV kits) are fully assembled and tested surface-mount PCBs that evaluate the stand-alone ModelGauge™ m5 pack-side fuel-gauge ICs for lithiumion (Li+) batteries in handheld and portable equipment. The MAX17201 and MAX17211 are for single-cell applications. See the MAX17205 and MAX17215 for multicell applications.

The MAX17201G/MAX17201X/MAX17211G/MAX17211X EV kits include the Maxim DS91230+ USB interface, IC evaluation board, and RJ-11 connection cable. Windows® based graphical user interface (GUI) software is available for use with the EV kit and can be downloaded from Maxim’s website at http://www.maximintegrated.com/products/MAX17201 (under the Design Resources tab). Windows 7 or newer Windows operating system is required to use with the EV kit GUI software.

View Details

Features

  • ModelGauge m5 Algorithm
  • Nonvolatile Memory Configured for Stand-Alone Operation
  • Monitors from 1S Cell Packs
  • Battery Pack Input Voltage Range of +2.1V to +4.9V per Cell
  • Thermistor Measurement Network
  • Optional On-Board PCB Trace Sense Resistor
  • Windows 7 or Newer Compatible Software
  • Proven PCB Layout
  • Fully Assembled and Tested

Description

The MAX17201G/MAX17201X/MAX17211G/MAX17211X evaluation kits (EV kits) are fully assembled and tested surface-mount PCBs that evaluate the stand-alone ModelGauge™ m5 pack-side fuel-gauge ICs for lithiumion (Li+) batteries in handheld and portable equipment. The MAX17201 and MAX17211 are for single-cell applications. See the MAX17205 and MAX17215 for multicell applications.

The MAX17201G/MAX17201X/MAX17211G/MAX17211X EV kits include the Maxim DS91230+ USB interface, IC evaluation board, and RJ-11 connection cable. Windows® based graphical user interface (GUI) software is available for use with the EV kit and can be downloaded from Maxim’s website at http://www.maximintegrated.com/products/MAX17201 (under the Design Resources tab). Windows 7 or newer Windows operating system is required to use with the EV kit GUI software.

View Details

Features

  • ModelGauge m5 Algorithm
  • Nonvolatile Memory Configured for Stand-Alone Operation
  • Monitors from 1S Cell Packs
  • Battery Pack Input Voltage Range of +2.1V to +4.9V per Cell
  • Thermistor Measurement Network
  • Optional On-Board PCB Trace Sense Resistor
  • Windows 7 or Newer Compatible Software
  • Proven PCB Layout
  • Fully Assembled and Tested

Description

The MAX17205G/MAX17205X/MAX17215G/MAX17215X evaluation kits (EV kits) are fully assembled and tested surface-mount PCBs that evaluate the stand-alone ModelGauge™ m5 pack-side fuel-gauge ICs for lithiumion (Li+) batteries in handheld and portable equipment. The MAX17205 and MAX17215 are for multicell applications. See the MAX17201 and MAX17211 for single-cell applications.

The MAX17205G/MAX17205X/MAX17215G/MAX17215X kits include the Maxim DS91230+ USB interface, IC evaluation board, and RJ-11 connection cable. Windows® based graphical user interface (GUI) software is available for use with the EV kit and can be downloaded from Maxim’s website at http://www.maximintegrated.com/products/MAX17205 (under the Design Resources tab). Windows 7 or newer Windows operating system is required to use with the EV kit GUI software.

View Details

Features

  • ModelGauge m5 Algorithm
  • Nonvolatile Memory Configured for Stand-Alone Operation
  • Monitors from 2S to More Than 15S Cell Packs
  • Battery Pack Input Voltage Range of +2.1V to +4.9V per Cell
  • Thermistor Measurement Network
  • Optional On-Board PCB Trace Sense Resistor
  • Windows 7 or Newer Compatible Software
  • Proven PCB Layout
  • Fully Assembled and Tested

Description

The MAX17205G/MAX17205X/MAX17215G/MAX17215X evaluation kits (EV kits) are fully assembled and tested surface-mount PCBs that evaluate the stand-alone ModelGauge™ m5 pack-side fuel-gauge ICs for lithiumion (Li+) batteries in handheld and portable equipment. The MAX17205 and MAX17215 are for multicell applications. See the MAX17201 and MAX17211 for single-cell applications.

The MAX17205G/MAX17205X/MAX17215G/MAX17215X kits include the Maxim DS91230+ USB interface, IC evaluation board, and RJ-11 connection cable. Windows® based graphical user interface (GUI) software is available for use with the EV kit and can be downloaded from Maxim’s website at http://www.maximintegrated.com/products/MAX17205 (under the Design Resources tab). Windows 7 or newer Windows operating system is required to use with the EV kit GUI software.

View Details

Features

  • ModelGauge m5 Algorithm
  • Nonvolatile Memory Configured for Stand-Alone Operation
  • Monitors from 2S to More Than 15S Cell Packs
  • Battery Pack Input Voltage Range of +2.1V to +4.9V per Cell
  • Thermistor Measurement Network
  • Optional On-Board PCB Trace Sense Resistor
  • Windows 7 or Newer Compatible Software
  • Proven PCB Layout
  • Fully Assembled and Tested

Description

The MAX17205G/MAX17205X/MAX17215G/MAX17215X evaluation kits (EV kits) are fully assembled and tested surface-mount PCBs that evaluate the stand-alone ModelGauge™ m5 pack-side fuel-gauge ICs for lithiumion (Li+) batteries in handheld and portable equipment. The MAX17205 and MAX17215 are for multicell applications. See the MAX17201 and MAX17211 for single-cell applications.

The MAX17205G/MAX17205X/MAX17215G/MAX17215X kits include the Maxim DS91230+ USB interface, IC evaluation board, and RJ-11 connection cable. Windows® based graphical user interface (GUI) software is available for use with the EV kit and can be downloaded from Maxim’s website at http://www.maximintegrated.com/products/MAX17205 (under the Design Resources tab). Windows 7 or newer Windows operating system is required to use with the EV kit GUI software.

View Details

Features

  • ModelGauge m5 Algorithm
  • Nonvolatile Memory Configured for Stand-Alone Operation
  • Monitors from 2S to More Than 15S Cell Packs
  • Battery Pack Input Voltage Range of +2.1V to +4.9V per Cell
  • Thermistor Measurement Network
  • Optional On-Board PCB Trace Sense Resistor
  • Windows 7 or Newer Compatible Software
  • Proven PCB Layout
  • Fully Assembled and Tested

Description

The MAX17205G/MAX17205X/MAX17215G/MAX17215X evaluation kits (EV kits) are fully assembled and tested surface-mount PCBs that evaluate the stand-alone ModelGauge™ m5 pack-side fuel-gauge ICs for lithiumion (Li+) batteries in handheld and portable equipment. The MAX17205 and MAX17215 are for multicell applications. See the MAX17201 and MAX17211 for single-cell applications.

The MAX17205G/MAX17205X/MAX17215G/MAX17215X kits include the Maxim DS91230+ USB interface, IC evaluation board, and RJ-11 connection cable. Windows® based graphical user interface (GUI) software is available for use with the EV kit and can be downloaded from Maxim’s website at http://www.maximintegrated.com/products/MAX17205 (under the Design Resources tab). Windows 7 or newer Windows operating system is required to use with the EV kit GUI software.

View Details

Features

  • ModelGauge m5 Algorithm
  • Nonvolatile Memory Configured for Stand-Alone Operation
  • Monitors from 2S to More Than 15S Cell Packs
  • Battery Pack Input Voltage Range of +2.1V to +4.9V per Cell
  • Thermistor Measurement Network
  • Optional On-Board PCB Trace Sense Resistor
  • Windows 7 or Newer Compatible Software
  • Proven PCB Layout
  • Fully Assembled and Tested

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Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal.

Parameters

Parametric specs for Battery ID and Authentication
Functions Fuel Gauge
SHA-256 Authentication
Status Monitor
Interface 2-Wire
User Data Storage (bits) 1248 NVM
VSUPPLY (V) 4.2 to 20
Package/Pins TDFN-CU/14
WLP/15
Oper. Temp. (°C) -40 to +85
Budgetary
Price (See Notes)
$1.76 @1k
Parametric specs for Battery Fuel Gauges, Protectors, and Monitors
Functions Fuel Gauge
Battery Type Multi-Cell Li-Ion
Fuel Gauge Algorithm ModelGauge m5
Interface 2-Wire
User Data Storage (Bytes) 156 NVM
Parameters Measured Current
State of Charge
Temperature
Time
Voltage
Applications Host
Pack
VSUPPLY (V) (min) 4.2
VSUPPLY (V) (max) 20
Package/Pins TDFN-CU/14
WLP/15
Oper. Temp. (°C) -

Key Features

  • 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
  • Nonvolatile Memory for Stand-Alone Operation
    • Learned Parameters and History Logging
    • Up to 75 Words Available for User Data
  • Precision Measurement System
    • No Calibration Required
  • Time-to-Empty and Time-to-Full Estimation
  • Temperature Measurement
    • Die Temperature
    • Up to Two External Thermistors
  • Multiple Series Cell Pack Operation
  • Low Quiescent Current
    • MAX172x1: 18µA Active, 9µA Hibernate
    • MAX172x5: 25µA Active, 12µA Hibernate
  • Alert Indicator for Voltage, SOC, Temperature, Current, and 1% SOC Change
  • High-Speed Overcurrent Comparators
  • Predicts Remaining Capacity Under Theoretical Load
  • SHA-256 Authentication
  • Maxim 1-Wire or 2-Wire (I2C) Interface
  • SBS 1.1 Compatible Register Set

Applications/Uses

  • Digital Still and Video Cameras
  • e-Readers
  • Handheld Computers and Terminals
  • Handheld Radios
  • Portable Game Players
  • Portable Medical Equipment
  • Smartphones and Tablets

Description

The MAX1720x/MAX1721x are ultra-low power stand-alone fuel gauge ICs that implement the Maxim ModelGauge m5 algorithm without requiring host interaction for configuration. This feature makes the MAX1720x/MAX1721x excellent pack-side fuel gauges. The MAX17201/MAX17211 monitor a single cell pack. The MAX17205/MAX17215 monitor and balance 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 provides 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 special 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 measured using an internal temperature measurement and up to two external thermistors supported by ratiometric measurements on auxiliary inputs. A Maxim 1-Wire® (MAX17211/MAX17215) or 2-wire I2C (MAX17201/MAX17205) interface provides access to data and control registers. The ICs are available in lead-free, 3mm × 3mm, 14-pin TDFN and 1.6mm × 2.4mm 15-bump WLP packages.

Design Solution: Advanced Battery Management for the Rest of Us ›


How to Prevent Battery Cloning Using the MAX17211EVKIT

Simplified Block Diagram

MAX17201, MAX17205, MAX17211, MAX17215: Functional Diagram Ultra-low power stand-alone fuel gauge ICs that implement the Maxim ModelGauge™ m5 algorithm | Functional Diagram Zoom icon

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal.