MAX17300 1-Cell ModelGauge m5 EZ Fuel Gauge with Protector and SHA-256 Authentication

The MAX17300MAX17303/MAX17310MAX17313 are 24µA I Q stand-alone pack-side fuel gauge ICs with protectors and optional SHA-256 authentication for the AD569KN single-cell Li-Ion/Polymer battery.

IC monitors battery voltage, current, temperature and status to provide protection from over/under voltage, over current, short circuit, over/under and over charge conditions using external high side N-FETs and provides charging prescription to ensure Li-Ion/Polymer The battery operates under safe conditions, thereby 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, which 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 battery aging, temperature, and discharge rate, and provides accurate state-of-charge (SOC) in milliamp hours (mAh) or percent (%) under various operating conditions.

The dynamic power function provides instantaneous maximum battery output power that can be supplied to the system without violating the minimum system input voltage.

A Maxim's 1-Wire® or 2-wire I2C interface provides access to data and control registers. The IC is available in lead-free 3mm x 3mm 14-pin TDFN and 1.7mm x 2.5mm 15-bump 0.5mm pitch WLP packages.

Simplified block diagram

Main features:

●Battery health + programmable safety/protection

- Overvoltage (depending on temperature)

- Overcharge current

- over/under temperature

— Internal battery self-discharge detection (MAX17300/10 only)

— Ideal diode discharge during charging fault

—Charging prescription (JEITA)

- Zero voltage charging option

—Undervoltage + SmartEmpty

- overdischarge/short circuit

●Non-volatile memory for stand-alone operation

—History, user data (122 bytes)

●Low quiescent current

- Enable FET: 24µA active, 18µA sleep

—FET disabled: 5µA Ship, 0.5µA/0.02µA DeepShip

Parallel battery management (MAX17300/10 only)

●Button wake - eliminates system drain until button is pressed

●ModelGauge m5 EZ algorithm

— Percentage, capacity, dead time/full time, age

—Cycle+? Age prediction

● Dynamic Power - estimated power capability

●Precision measurement without calibration

—Current, Voltage, Power, Time, Period

—Chip temperature/Thermistor


●Smartphones, tablets and 2-in-1 laptops

●Smartwatches and wearables

●Medical equipment, health and fitness monitors

●Digital still, video and action cameras

● Pocket PCs and Terminals

●Handheld radio

●Home and building automation, sensors

●Smart battery