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Maxim Integrated Semiconductor Electronic Components Datasheet


MAX11080

High-Voltage Battery-Pack Fault Monitor



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MAX11080 pdf
19-4584; Rev 0; 5/09
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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.



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MAX11080 pdf
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12-Channel, High-Voltage Battery-Pack
Fault Monitor
ABSOLUTE MAXIMUM RATINGS
HV, VDDU, GNDU, DCIN to AGND.........................-0.3V to +80V
HV to DCIN and C12 ................................................-0.3V to +6V
C2–C12 to AGND ....................................-0.3V to (VDCIN + 0.6V)
Cn+1 to Cn, where n = 2 to 12...............................-0.3V to +80V
C1 to C0 ...................................................-0.3V to +20V (Note 1)
C1 to AGND ..............................-0.3V to (VDCIN + 0.6V) (Note 2)
C0 to AGND...........................................................-0.3V to +0.9V
SHDN, VAA to AGND ................................................-0.3V to +4V
VDDU to GNDU.........................................................-0.3V to +6V
OVSEL_, UVSEL_, TOPSEL to AGND ......-0.3V to (+VAA + 0.3V)
CD, ALRML to AGND ...............................-0.3V to (+VAA + 0.3V)
ALRMU to GNDU ...................................-0.3V to (+VDDU + 0.3V)
CP+ to AGND ...........................(GNDU - 0.3V) to (VDDU + 0.3V)
CP- to AGND...........................................-0.3V to (GNDU + 0.3V)
CP- to VDDU .......................................................................+0.3V
ESD Rating
C_, REF, VAA, VDDU GNDU,
DCIN, SHDN, CP+, CP-, HV,
OVSEL_, UVSEL_, TOPSEL,
ALRMU, ALRML,
AGND, CD ..............................±2kV (Human Body Model, Note 3)
Continuous Power Dissipation (TA = +70°C)
38-Pin TSSOP
(derating 15.9mW/°C above +70°C) .........................1095.9mW
Operating Temperature Range .........................-40°C to +105°C
Storage Temperature Range .............................-55°C to +150°C
Junction Temperature (continuous) .................................+150°C
Lead Temperature (soldering, 10s) .................................+300°C
Note 1: The C1 to C0 differential input path is tolerant to 80V as long as the SHDN pin is deasserted.
Note 2: The C1 input is tolerant to a maximum VDCIN + 0.6V. If SHDN is asserted, 20V is the maximum rating.
Note 3: Human Body Model to Specification MIL-STD-883 Method 3015.7.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(TA = TMIN to TMAX, unless otherwise noted. VDCIN = VGNDu = +6.0V to +72V, typical values are at TA = +25°C, unless otherwise
specified from -40°C to +105°C.)
PARAMETER
C_ INPUTS
Common-Mode Input Range
Input Current
Overvoltage Threshold
Overvoltage-Threshold Accuracy
Undervoltage Threshold
Undervoltage-Threshold
Accuracy
Comparator Hysteresis
CD PIN
CD Current
CD Trip Voltage
Delay-Time Accuracy
STATUS/CONTROL PORT
Shutdown Disable (SHDN High
Voltage)
Shutdown Asserted (SHDN Low
Voltage)
SYMBOL
CONDITIONS
VCXIN
ICXIN
VOV
VUV
Any two inputs Cn to Cn+1 for full
threshold accuracy (Note 4)
VCELL = 3.0V
VHYS
ICD
VCD
VCD = 0.4V
Internal at comparator
Excluding CDLY variation
SHDN/VIH
SHDN/VIL
MIN TYP MAX UNITS
1.5
-1
+3.3
+1.6
0.05
±5
±20
300
72
+1
+4.8
±25
+2.8
±100
4.35 6.1 7.65
1.23
±20
V
µA
V
mV
V
mV
mV
µA
V
%
2.1 V
0.6 V
2 _______________________________________________________________________________________



Part Number MAX11080
Description High-Voltage Battery-Pack Fault Monitor
Maker Maxim Integrated Products - Maxim Integrated Products
Total Page 27 Pages
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