MAXIM MAX17302X+T

MAX17300-MAX17303/MAX17310-MAX17313 is a 24μA IQ pack-side fuel gauge IC with protector, optional battery internal self-discharge detection, and optional SHA-256 authentication for single-cell Li-Ion/polymer batteries. The IC monitors battery voltage, current, temperature, and state, uses an external high-side N-FET to provide overvoltage/undervoltage, overcurrent, short-circuit, overtemperature/undertemperature, overcharge, and internal self-discharge protection, and provides charge prescriptions to ensure Li-Ion/polymer batteries operate under safe conditions, extending battery life. To prevent battery pack cloning, the IC integrates SHA-256 authentication with a 160-bit key. Each IC contains a unique 64-bit ID. The fuel gauge uses the ModelGauge m5 algorithm, combining the short-term accuracy and linearity of a coulomb counter with the long-term stability of a voltage-based fuel gauge to deliver high-accuracy fuel gauging. The IC automatically compensates for battery aging, temperature, and discharge rate, providing accurate state of charge (SOC) in milliampere-hours (mAh) or percentage across various operating conditions. The dynamic power feature provides instantaneous maximum battery output power that can be delivered to the system without violating the minimum system input voltage. A 1-Wire or 2-wire I2C interface provides access to data and control registers. The IC is available in lead-free, 3mm×3mm 14-pin TDFN and 1.7mm×2.5mm 15-bump 0.5mm pitch WLP packages.

• Programmable battery health safety/protection: overvoltage (temperature-dependent), overcharge current, overtemperature/undertemperature, battery internal self-discharge detection (MAX17300/10 only), ideal diode discharge during charge fault, charge prescription (JEITA), zero-volt charge option, undervoltage + SmartEmpty, overdischarge/short circuit
• Nonvolatile memory for standalone operation: history log, user data (122 bytes)
• Low quiescent current: FET enabled: 24μA active, 18μA sleep; FET disabled: 5μA transport, 0.5μA/0.02μA deep transport
• Parallel battery management (MAX17300/10 only): pushbutton wake — eliminates system drain before button press
• ModelGauge m5 EZ algorithm: percentage, capacity, time-to-empty/full, age; Cycle+ age prediction
• Dynamic power — estimated power capability
• Calibration-free precision measurements: current, voltage, power, time, cycle count; die temperature/thermistor

• 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