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PDF MAX11080 Data sheet ( Hoja de datos )
| Número de pieza | MAX11080 | |
| Descripción | High-Voltage Battery-Pack Fault Monitor | |
| Fabricantes | Maxim Integrated Products | |
| Logotipo |  |
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19-4584; Rev 0; 5/09
www.DataSheet4U.com
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.
1 page  
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12-Channel, High-Voltage Battery-Pack
Fault Monitor
PIN
1
2
3, 33
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25, 29,
30, 32
26
27
28
Pin Description
NAME
FUNCTION
DCIN DC Power-Supply Input. DCIN supplies the internal 3.3V regulator. This pin should be connected as shown
in the application diagrams.
HV High-Voltage Bias. HV is biased by the output of the charge pump to provide a DC supply above the DCIN
level. It is used internally to bias the cell-comparator circuitry. Bypass to DCIN with a 1µF capacitor.
N.C.
C12
C11
C10
C9
C8
C7
C6
C5
C4
C3
C2
C1
C0
UVSEL0
UVSEL1
UVSEL2
OVSEL0
OVSEL1
OVSEL2
OVSEL3
VAA
No Connection
Cell 12 Plus Connection. Top of battery module stack.
Cell 12 Minus Connection and Cell 11 Plus Connection
Cell 11 Minus Connection and Cell 10 Plus Connection
Cell 10 Minus Connection and Cell 9 Plus Connection
Cell 9 Minus Connection and Cell 8 Plus Connection
Cell 8 Minus Connection and Cell 7 Plus Connection
Cell 7 Minus Connection and Cell 6 Plus Connection
Cell 6 Minus Connection and Cell 5 Plus Connection
Cell 5 Minus Connection and Cell 4 Plus Connection
Cell 4 Minus Connection and Cell 3 Plus Connection
Cell 3 Minus Connection and Cell 2 Plus Connection
Cell 2 Minus Connection and Cell 1 Plus Connection
Cell 1 Minus Connection
Undervoltage Threshold Select 2 to 0. Used to select one of eight undervoltage alarm threshold settings.
The parts have internal pulldown; these pins should only be tied to VAA or AGND to set the logic state.
Overvoltage Threshold Select 3 to 0. Used to select one of 16 overvoltage alarm threshold settings.
The parts have internal pulldown; these pins should only be tied to VAA or AGND to set the logic state.
+3.3V Analog Supply Output. Bypass with a 1µF capacitor to AGND.
AGND Analog Ground. Should be connected to the negative terminal of cell 1.
SHDN
ALRML
CD
Active-Low Shutdown Input. This pin completely shuts down the MAX11080 internal regulator and
oscillators when the pin is less than 0.6V as referenced to AGND. The host controller should drive SHDN for
the first pack. SHDN for daisy-chained modules should be connected to the lower neighboring module’s
VDDU through a 20kΩ series resistor.
Lower Port Alarm Output. This output is an alarm indicator for overvoltage, undervoltage, and setup faults.
The alarm signal is daisy chained and driven from the highest module down to the lowest. The alarm output
is nominally a clocked “heartbeat” signal that provides a 4kHz clock when no alarm is present. The ALRML
can also be configured as level signal and set to “low” for no alarm and “high” for alarm state. See the
TOPSEL Function section for details. This signal swings between VAA and AGND, and is active high in the
alarm state.
Programmable Delay Time. Connect a capacitor from this pin to AGND to set the hold time required for a
fault condition before the alarm is set. The capacitor should be a ceramic capacitor in the 15nF to 16.5µF
range.
_______________________________________________________________________________________ 5
5 Page 
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12-Channel, High-Voltage Battery-Pack
Fault Monitor
Figure 5. Battery Module System with Redundant Fault-Detection Application Schematic
______________________________________________________________________________________ 11
11 Page | ||
| Páginas | Total 27 Páginas | |
| PDF Descargar | [ Datasheet MAX11080.PDF ] | |
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