General Description

The MAX11080/MAX11081 are battery-pack fault-monitor ICs capable of monitoring up to 12 lithium-ion (Li+) battery cells. This device is designed to provide an overvoltage or undervoltage fault indication when any of the cells cross the user-selectable threshold for longer than the set program-delay interval. The overvoltage levels are pin selectable from +3.3V to +4.8V in 100mV increments, and have a guaranteed accuracy of ±25mV over the entire temperature range. The undervoltage level is also user selectable from +1.6V to +2.8V in 200mV increments. These levels are guaranteed to ±100mV over the entire temperature range. Undervoltage detection can be disabled as one of the user-configuration options.

Features

♦ Up to 12-Cell Li+ Battery Voltage Fault Detection

♦ Operation from 6.0V to 72V

♦ Pin-Selectable Overvoltage Threshold from +3.3V to +4.8V in 100mV Increments ±25mV Overvoltage-Detection Accuracy

♦ Pin-Selectable Undervoltage Threshold from

    +1.6V to +2.8V in 200mV Increments

    ±100mV Undervoltage-Detection Accuracy

♦ Overvoltage/Undervoltage-Threshold Detection Hysteresis

    MAX11080: 300mV

    MAX11081: 37.5mV

♦ Programmable Delay Time of Alarm Detection from 3.0ms to 3.32s with an External Capacitor

♦ Daisy-Chained Alarm and Shutdown Functions with Heartbeat Status Signal Up to 31 Devices Can Be Connected

♦ Ultra-Low-Power Dissipation

    Operating-Mode Current Drain: 80µA

    Shutdown-Mode Current: 2µA

♦ Wide Operating Temperature Range from -40°C to +105°C (AEC-Q100, Type 2)

♦ 9.7mm x 4.4mm, 38-Pin TSSOP Package

♦ Lead(Pb)-Free and RoHS Compliant

Applications

    High-Voltage, Multicell-Series-Stacked Battery Systems

    Electric Vehicles

    Hybrid Electric Vehicles

    Electric Bikes

    High-Power Battery Backup

    Solar Cell Battery Backup

    Super-Cap Battery Backup