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MAX11080IUU+T

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General Description
The MAX11080/MAX11081 are battery-pack fault-moni-
tor 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 over-
voltage levels are pin selectable from +3.3V to +4.8V
in 100mV increments, and have a guaranteed accura-
cy 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 guar-
anteed to ±100mV over the entire temperature range.
Undervoltage detection can be disabled as one of the
user-configuration options.
The MAX11080/MAX11081 have a built-in level-shifter
that allows up to 31 MAX11080/MAX11081 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 overvoltage and undervoltage thresh-
olds. When any of the cells exceed this threshold for
longer than the set program delay interval, the
MAX11080/MAX11081 inhibit the heartbeat signal from
being passed down the daisy-chain. Built-in compara-
tor hysteresis prevents threshold chattering.
The MAX11080/MAX11081 are designed to be the per-
fect complement to the MAX11068 high-voltage mea-
surement 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
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 Overvoltage/Undervoltage-Threshold Detection
Hysteresis
MAX11080: 300mV
MAX11081: 37.5mV
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
MAX11080/MAX11081
12-Channel, High-Voltage
Battery-Pack Fault Monitors
________________________________________________________________
Maxim Integrated Products
1
Ordering Information
19-4584; Rev 1; 6/10
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.
EVALUATION KIT
AVAILABLE
+
Denotes a lead(Pb)-free/RoHS-compliant package.
/V denotes an automotive qualified part.
PART TEMP RANGE
PIN-PACKAGE
MAX11080GUU/V+
-40°C to +105°C
38 TSSOP
MAX11081GUU/V+
-40°C to +105°C
38 TSSOP
Pin Configuration appears at end of data sheet.
MAX11080/MAX11081
12-Channel, High-Voltage
Battery-Pack Fault Monitors
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(T
A
= T
MIN
to T
MAX
, unless otherwise noted. V
DCIN
= V
GND
U
= +6.0V to +72V, typical values are at T
A
= +25°C, unless otherwise
specified from -40°C to +105°C.)
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.
HV, VDD
U
, GND
U
, DCIN to AGND.........................-0.3V to +80V
HV to DCIN and C12 ................................................-0.3V to +6V
Cn+1 to Cn, where n = 1 to 11...............................-0.3V to +80V
C1 to C0 ...................................................-0.3V to +20V (Note 1)
C1 to AGND ..............................-0.3V to (V
DCIN
+ 0.6V) (Note 2)
C0 to AGND...........................................................-0.3V to +0.9V
C2–C12 to AGND ....................................-0.3V to (V
DCIN
+ 0.6V)
SHDN, V
AA
to AGND................................................-0.3V to +4V
VDD
U
to GND
U
.........................................................-0.3V to +6V
OVSEL_, UVSEL_, TOPSEL to AGND.........-0.3V to (V
AA
+ 0.3V)
CD, ALRM
L
to AGND..................................-0.3V to (V
AA
+ 0.3V)
ALRM
U
to GND
U
...................................-0.3V to (+VDD
U
+ 0.3V)
CP+ to AGND ...........................(GND
U
- 0.3V) to (VDD
U
+ 0.3V)
CP- to AGND...........................................-0.3V to (GND
U
+ 0.3V)
CP- to VDD
U
.......................................................................+0.3V
ESD Rating
C_, REF, V
AA
, VDD
U,
GND
U
,
DCIN, SHDN, CP+, CP-, HV,
OVSEL_, UVSEL_, TOPSEL,
ALRM
U
, ALRM
L
,
AGND, CD
..............................
±2kV (Human Body Model, Note 3)
Continuous Power Dissipation (T
A
= +70°C)
38-Pin TSSOP (derate 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
Soldering Temperature (reflow) .......................................+260°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
C_ INPUTS
Any two inputs Cn to Cn+1,
where n = 1 to 11 (Note 4)
1.5 72
C1 to C0 with SHDN = 1 1.5 72
Differential Input Range VCELL
XIN
C1 to C0 with SHDN = 0 1.5 16
V
Input Current IC
XIN
V
CELL
= 3.0V -1 0.05 +1 µA
Overvoltage Threshold V
OV
+3.3 +4.8 V
Overvoltage-Threshold Accuracy ±5 ±25 mV
Undervoltage Threshold V
UV
+1.6 +2.8 V
Undervoltage-Threshold
Accuracy
±20 ±100 mV
MAX11080 300
Comparator Hysteresis (Note 4) V
HYS
MAX11081 12 37.5 77
mV
CD PIN
CD Current I
CD
V
CD
= 0.4V 4.35 6.1 7.65 µA
CD Trip Voltage V
CD
Internal at comparator 1.23 V
Delay-Time Accuracy Excluding C
DLY
variation ±20 %
STATUS/CONTROL PORT
Shutdown Disable (SHDN High
Voltage)
SHDN/V
IH
2.1 V
Shutdown Asserted (SHDN Low
Voltage)
SHDN/V
IL
0.6 V
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 V
DCIN
+ 0.6V with SHDN = 1. If SHDN = 0, 20V is the maximum rating.
Note 3: Human Body Model to Specification MIL-STD-883 Method 3015.7.
MAX11080/MAX11081
12-Channel, High-Voltage
Battery-Pack Fault Monitors
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(T
A
= T
MIN
to T
MAX
, unless otherwise noted. V
DCIN
= V
GND
U
= +6.0V to +72V, typical values are at T
A
= +25°C, unless otherwise
specified from -40°C to +105°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
VDD
U
Output High
VDD
U
V
OH
V
GND
U
+ 2.4
V
VDD
U
Output Low
VDD
U
V
OL
V
GND
U
+ 0.3
V
ALRM
L
Output Voltage High
ALRM
L
V
OH
I
SOURCE
= 150µA 2.4 V
ALRM
L
Output Voltage Low
ALRM
L
V
OL
I
SINK
= 150µA 0.6 V
ALRM
U
Input Voltage High
ALRM
U
V
IH
Daisy-chained ALRM
U
signal as
coupled through a 3.3nF high-voltage
capacitor and a 150kΩ resistor as
referred to GND
U
V
GND
U
+ 2.1
V
ALRM
U
Input Voltage Low
ALRM
U
V
IL
Daisy-chained ALRM
U
signal as
coupled through a 3.3nF high-voltage
capacitor and a 150kΩ resistor as
referred to GND
U
V
GND
U
+ 0.9
V
Alarm Voltage Output “Heartbeat”
Frequency
ALRM
L
f
OUT
Heartbeat clock rate with no alarm
condition
4032 4096 4157 Hz
Alarm Voltage Output Duty Cycle
Heartbeat clock rate with no alarm
condition
49.0 51.0 %
LINEAR REGULATOR (V
AA
)
Input-Voltage Range V
DCIN
672V
Output Voltage V
AAOUT
6V < V
DCIN
< 72V, I
LOAD
= 0A 3.0 3.3 3.6 V
Short-Circuit Current I
AA S H ORT C IR C U IT
V
AA
= 0V, 6V < V
DCIN
< 36V 50 mA
V
AARESET
Falling V
AA
2.8
V
AAVALID
Rising V
AA
3.0
V
Power-On-Reset Trip Level
(Note 5)
V
AAHYS
Hysteresis on rising V
AA
37 mV
Thermal Shutdown T
SHUT
Rising temperature +145 °C
POWER-SUPPLY REQUIREMENTS (DCIN)
Operating mode, SHDN = 1, 12
battery cells, alarm inactive,
V
DCIN
= V
GND
U
= 36V
35 40
Current Consumption I
DCIN
Shutdown mode, SHDN = 0, 12
battery cells, V
DCIN
= V
GND
U
= 36V
1.3 2
µA
I
GND
U
Operating Mode
SHDN = 1, battery cells, alarm
inactive, V
DCIN
= V
GND
U
= 36V
35 40 µA
LOGIC INPUTS AND OUTPUTS
V
IH
UVSEL0/UVSEL1/UVSEL2, TOPSEL V
AA
- 0.1
Threshold Setting
V
IL
OVSELO/OVSEL1/OVSEL2/OVSEL3 0.1
V
Note 4: Limits guaranteed by design and characterization statistical analysis, not production tested.
Note 5: Guaranteed by design and not production tested.
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MAX11080IUU+T

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Buy MAX11080IUU+T
Manufacturer:
Maxim Integrated
Description:
Battery Management 12 Ch Hi Volt Batt Pack Fault Monitor
Lifecycle:
New from this manufacturer.
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