MAX11080 Datasheet, PDF (1/27 Pages) Maxim Integrated Products – 12-Channel, High-Voltage Battery-Pack Fault Monitor

19-4584; Rev 0; 5/09
12-Channel, High-Voltage Battery-Pack
Fault Monitor
General Description
The MAX11080 is a battery-pack fault-monitor IC capa-
ble of monitoring up to 12 lithium-ion (Li+) battery
cells. This device is designed to provide an overvolt-
age 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 under-
voltage level is also user selectable from +1.6V to
+2.8V in 200mV increments. These levels are guaran-
teed 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 daisy-
chain fashion to reduce the number of interface signals
needed for large stacks of series batteries. Each cell is
monitored differentially and compared to the overvolt-
age and undervoltage thresholds. When any of the cells
exceed this threshold for longer than the set program
delay interval, the MAX11080 inhibits the heartbeat sig-
nal from being passed down the daisy chain. Built-in
comparator hysteresis prevents threshold chattering.
The MAX11080 is designed to be the perfect comple-
ment 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 tempera-
ture 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
Features
o Up to 12-Cell Li+ Battery Voltage Fault Detection
o Operation from 6.0V to 72V
o Pin-Selectable Overvoltage Threshold from +3.3V
to +4.8V in 100mV Increments
±25mV Overvoltage-Detection Accuracy
o Pin-Selectable Undervoltage Threshold from
+1.6V to +2.8V in 200mV Increments
±100mV Undervoltage-Detection Accuracy
o 300mV Over/Undervoltage-Threshold Detection
Hysteresis
o Programmable Delay Time of Alarm Detection
from 3.0ms to 3.32s with an External Capacitor
o Daisy-Chained Alarm and Shutdown Functions
with Heartbeat Status Signal
Up to 31 Devices Can Be Connected
o Ultra-Low-Power Dissipation
Operating-Mode Current Drain: 80µA
Shutdown-Mode Current: 2µA
o Wide Operating Temperature Range from -40°C to
+105°C (AEC-Q100 Type 2)
o 9.7mm x 4.4mm, 38-Pin TSSOP Package
o Lead(Pb) Free and RoHS Compliant
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAX11080GUU+ -40°C to +105°C 38 TSSOP
MAX11080GUU/V+ -40°C to +105°C 38 TSSOP
+Denotes a lead(Pb)-free/RoHS-compliant package.
/V denotes an automotive qualified part.
Pin Configuration appears at end of data sheet.
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.