MAX17201
Stand-Alone ModelGauge m5 Fuel Gauge with SHA-256 Authentication
Industry's First Stand-Alone ModelGauge m5 Fuel Gauge with SHA-256 Authentication
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Key Features
Applications/Uses
| Functions | Fuel Gauge SHA-256 Authentication Status Monitor |
| Interface | 2-Wire |
| User Data Storage (bits) | 1248 NVM |
| VSUPPLY (V) | 2.3 to 4.9 |
| Package/Pins | TDFN-CU/14 WLP/15 |
| Oper. Temp. (°C) | -40 to +85 |
| Budgetary Price (See Notes) | 1.81 |
| Functions | Fuel Gauge |
| Battery Type | 1 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 |
| End Equipment | Host Pack |
| VSUPPLY (V) (min) | 2.3 |
| VSUPPLY (V) (max) | 4.9 |
| Package/Pins | TDFN-CU/14 WLP/15 |
| Oper. Temp. (°C) | -40 to +85 |
Simplified Block Diagram
Technical Docs
Design Solution: Advanced Battery Management for the Rest of Us ›
Prevent Battery Counterfeiting with Secure Fuel Gauges
How Secure Fuel Gauges Can Prevent Battery CounterfeitingSupport & Training
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Parameters
| Functions | Fuel Gauge SHA-256 Authentication Status Monitor |
| Interface | 2-Wire |
| User Data Storage (bits) | 1248 NVM |
| VSUPPLY (V) | 2.3 to 4.9 |
| Package/Pins | TDFN-CU/14 WLP/15 |
| Oper. Temp. (°C) | -40 to +85 |
| Budgetary Price (See Notes) | 1.81 |
| Functions | Fuel Gauge |
| Battery Type | 1 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 |
| End Equipment | Host Pack |
| VSUPPLY (V) (min) | 2.3 |
| VSUPPLY (V) (max) | 4.9 |
| Package/Pins | TDFN-CU/14 WLP/15 |
| Oper. Temp. (°C) | -40 to +85 |
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
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 ›
Technical Docs
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .
Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact [email protected] with any questions regarding this Sample Site.
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