The MAX17301–MAX17303/MAX17311–MAX17313 is a 24μA IQ stand-alone pack-side fuel gauge IC with protector and optional SHA-256 authentication for 1-cell lithium-ion/polymer batteries.
The IC monitors the voltage, current, temperature, and state of the battery to provide against over/undervoltage, overcurrent, short-circuit, over/undertemperature and overcharge conditions protection using external high-side N-FETs, and provides charging prescription to ensure that the lithium-ion/polymer battery operates under safe conditions prolonging the life of the battery.
To prevent battery pack cloning, the IC integrates SHA-256 authentication with a 160-bit secret key. Each IC incorporates a unique 64-bit ID.
The fuel gauge uses ModelGauge m5 algorithm that combines the short-term accuracy and linearity of a coulomb counter with the long-term stability of a voltage-based fuel gauge 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.
Dynamic power functionality provides the instantaneous maximum battery output power which can be delivered to the system without violating the minimum system input voltage.
A Maxim 1-Wire or 2-wire I2C interface provides access to data and control registers. The IC is available in a lead-free, 3mm x 3mm 14-pin TDFN and 1.7mm x 2.5mm 15-bump 0.5mm pitch WLP packages.Feature
- Battery Health + Programmable Safety/Protection
- Overvoltage (Temperature Dependent)
- Overcharge Current
- Over/Undertemperature
- Ideal Diode Discharge During Charge Fault
- Charging Prescriptions (JEITA)
- Zero-Volt Charging Option
- Undervoltage + SmartEmpty
- Overdischarge/Short-Circuit
- Nonvolatile Memory for Stand-Alone Operation
- ?History Logging, User Data (122 Bytes)
- Low Quiescent Current
- FETs Enabled: 24μA Active, 18μA Hibernate
- FETs Disabled: 7μA Ship, 0.5μA DeepShip, 0.1μA UV-Shutdown
- Pushbutton Wakeup—Eliminates System Consumption Until Button Press
- ModelGauge m5 EZ Algorithm
- Percent, Capacity,Time-to-Empty/Full, Age
- Cycle+? Age Forecast
- Dynamic Power—Estimates Power Capability
- Precision Measurement Without Calibration
- ?Current, Voltage, Power, Time, Cycles
- Die Temperature?/Thermistor
Applications
- Smartphones, Tablets, and 2-in-1 Laptops
- Smartwatches and Wearables
- Medical Devices, Health and Fitness Monitors
- Digital Still, Video, and Action Cameras
- Handheld Computers and Terminals
- Handheld Radios
- Home and Building Automation, Sensors
- Smart Batteries
