Analog Devices / Maxim Integrated MAX17301–MAX17303/MAX17311–MAX17313 Fuel Gauges
Analog Devices MAX17301–MAX17303/MAX17311–MAX17313 Fuel Gauges offer a protector and optional SHA-256 authentication for 1-cell lithium-ion/polymer batteries. These devices monitor the battery's voltage, current, and temperature, allowing over/under voltage, overcurrent, short-circuit, over/under temperature, and overcharge protection. Using external high-side N-FETs, the protection features ensure that the lithium-ion/polymer battery operates under safe conditions, prolonging the battery's life.
Battery pack cloning is prevented by integrating the SHA-256 authentication with a 160-bit secret key, allowing each IC to incorporate a unique 64-bit ID. The MAX17301–MAX17303/MAX17311–MAX17313 have excellent fuel-gauge accuracy using a 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. Instantaneous maximum battery output power is delivered to the system via the dynamic power functionality without violating the minimum system input voltage.
Access to data and control registers is provided through the Maxim 1-Wire® or 2-wire I2C interface. Maxim Integrated MAX17301–MAX17303/MAX17311–MAX17313 Fuel Gauges are available in a lead-free, 3mm x 3mm 14-pin TDFN and a 1.7mm x 2.5mm 15-bump 0.5mm pitch WLP package.
Features
- 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)
- Dynamic power-estimates power capability
- 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
- 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
Development Tool
Analog Devices / Maxim Integrated MAX1730xX-MAX1730xG/MAX1731xX-MAX1731xG Eval Kits
Surface-mount PCBs that evaluate the MAX17301–MAX17303/MAX17311–MAX17313 Fuel Gauges.
Videos
Typical Application Circuit
Block Diagram
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