MAX11080,pdf datasheet(Battery-Pack Fault Monitor)

The MAX11080 is a battery-pack fault-monitor IC 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.

The MAX11080 has a built-in level-shifter that allows up

to 31 MAX11080 devices to be connected in a daisychain

fashion to reduce the number of interface signals

needed for large stacks of series batteries. Each cell is

monitored differentially and compared to the overvoltage

and undervoltage thresholds. When any of the cells

exceed this threshold for longer than the set program

delay interval, the MAX11080 inhibits the heartbeat signal

from being passed down the daisy chain. Built-in

comparator hysteresis prevents threshold chattering.

The MAX11080 is designed to be the perfect complement

to the MAX11068 high-voltage measurement IC

for redundant fault-monitoring applications. This device

is offered in a 9.7mm x 4.4mm, 38-pin TSSOP package

with 0.5mm pin spacing. The package is lead-free and

RoHS compliant with an extended operating temperature

range of -40°C to +105°C.

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