IC LI/BATTERY MANAGEMENT 38TSSOP

MAX11080GUU+

Manufacturer Part NumberMAX11080GUU+
DescriptionIC LI/BATTERY MANAGEMENT 38TSSOP
ManufacturerMaxim Integrated Products
MAX11080GUU+ datasheets
 

Specifications of MAX11080GUU+

FunctionBattery MonitorBattery TypeLithium-Ion (Li-Ion)
Voltage - Supply6 V ~ 72 VOperating Temperature-40°C ~ 105°C
Mounting TypeSurface MountPackage / Case38-TSSOP (0.173", 4.40mm Width)
ProductCharge ManagementOperating Supply Voltage6 V to 72 V
Supply Current0.05 uAMaximum Operating Temperature+ 105 C
Minimum Operating Temperature- 40 CCharge Safety TimersNo
Mounting StyleSMD/SMTTemperature MonitoringNo
Uvlo Start Threshold1.6 VUvlo Stop Threshold2.8 V
No. Of Batteries12Supply Voltage Range6V To 72V
Battery Ic Case StyleTSSOPNo. Of Pins38
Operating Temperature Range-40°C To +105°CRohs CompliantYes
Lead Free Status / RoHS StatusLead free / RoHS Compliant  
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19-4584; Rev 1; 6/10
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.
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
________________________________________________________________ Maxim Integrated Products
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.
12-Channel, High-Voltage
Battery-Pack Fault Monitors
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
Applications
PART
MAX11080GUU/V+
MAX11081GUU/V+
+ Denotes a lead(Pb)-free/RoHS-compliant package.
/V denotes an automotive qualified part.
Pin Configuration appears at end of data sheet.
Features
Ordering Information
TEMP RANGE
PIN-PACKAGE
-40°C to +105°C
38 TSSOP
-40°C to +105°C
38 TSSOP
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MAX11080GUU+ Summary of contents

  • Page 1

    ... Hybrid Electric Vehicles Electric Bikes High-Power Battery Backup Solar Cell Battery Backup Super-Cap Battery Backup ________________________________________________________________ Maxim Integrated Products 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. 12-Channel, High-Voltage Battery-Pack Fault Monitors 12-Cell Li+ Battery Voltage Fault Detection o Operation from 6 ...

  • Page 2

    High-Voltage Battery-Pack Fault Monitors ABSOLUTE MAXIMUM RATINGS HV, VDD , GND , DCIN to AGND.........................-0.3V to +80V DCIN and C12 ................................................-0.3V to +6V Cn+1 to Cn, where 11...............................-0.3V to +80V C1 ...

  • Page 3

    ELECTRICAL CHARACTERISTICS (continued unless otherwise noted MIN MAX specified from -40°C to +105°C.) PARAMETER VDD Output High U VDD Output Low U ALRM Output Voltage High L ALRM Output Voltage Low L ...

  • Page 4

    High-Voltage Battery-Pack Fault Monitors (T = +25°C, unless otherwise noted.) A UNDERVOLTAGE SET THRESHOLD vs. TEMPERATURE 1.64 1.6V SET POINT 1.63 1.62 MAX 1.61 1.60 MEAN 1.59 1.58 1.57 MIN 1.56 1.55 -40 - ...

  • Page 5

    PIN NAME DC Power-Supply Input. DCIN supplies the internal 3.3V regulator. This pin should be connected as shown 1 DCIN in the application diagrams. High-Voltage Bias biased by the output of the charge pump to provide a DC ...

  • Page 6

    High-Voltage Battery-Pack Fault Monitors PIN NAME 24 V +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. Active-Low Shutdown Input. This pin ...

  • Page 7

    C12 CELL COMPARATORS C11 CELL COMPARATORS C10 CELL COMPARATORS C9 CELL COMPARATORS C8 CELL COMPARATORS C7 CELL COMPARATORS C6 CELL COMPARATORS C5 CELL COMPARATORS C4 CELL COMPARATORS C3 CELL COMPARATORS C2 CELL COMPARATORS C1 CELL COMPARATORS C0 Figure 1. Functional ...

  • Page 8

    High-Voltage Battery-Pack Fault Monitors MODULE MODULE N+1 N+1 CELL STACK GND REFERENCE FUSE MODULE- (N+1) 22Ω BUS BAR C DCIN 0.1µF SMCJ70 80V MODULE+ (N) R13 CELL 12 R12 CELL 11 R11 CELL 10 R10 CELL 9 R9 CELL ...

  • Page 9

    MODULE MODULE N+1 N+1 CELL STACK GND REFERENCE FUSE MODULE- (N+1) 22Ω C BUS BAR DCIN 0.1µF 80V MODULE+ (N) R11 C10 CELL 10 R10 CELL 9 R9 CELL 8 R8 CELL 7 R7 CELL 6 R6 CELL 5 R5 ...

  • Page 10

    High-Voltage Battery-Pack Fault Monitors MODULE MODULE N+1 N+1 CELL STACK GND REFERENCE FUSE MODULE- (N+1) 22Ω C BUS BAR DCIN 0.1µF 80V MODULE+ (N) R9 CELL 8 R8 CELL 7 R7 CELL 6 R6 CELL 5 R5 CELL 4 ...

  • Page 11

    MODULE MODULE N+1 N+1 CELL STACK GND REFERENCE MODULE- (N+1) HV DCIN BUS BAR C24 C23 R26 R25 R24 MODULE+ (N) CELL 12 CELL 11 CELL 10 CELL 9 CELL 8 CELL 7 CELL 6 CELL 5 CELL 4 CELL ...

  • Page 12

    High-Voltage Battery-Pack Fault Monitors HV 6V DCIN C12 C1 TO C11 ESD DIODES MAX11080 MAX11081 C0 AGND Figure 6. ESD Diode Diagram Detailed Description Figure 1 shows the functional diagram; Figure 2 shows the application circuit diagram for a ...

  • Page 13

    The threshold references for the comparators are set by the UVSEL_ and OVSEL_ input pins. When one of the cell voltages exceeds below V when internal cell out-of-range signal for ...

  • Page 14

    High-Voltage Battery-Pack Fault Monitors event. Figure 8 summarizes the C DLY Once the ALRM pin is forced high due to an alarm L (+2.4V minimum as referred to AGND), it transitions back to a heartbeat signal only after all ...

  • Page 15

    V OV ANY CELL CELL VOLTAGE CD ALRM L Figure 9. Single-Cell Overvoltage Detection Example V OV CELL 12 CELL 11 CELL VOLTAGE CELL N CELL 1 CD ALRM L Figure 10. Multiple-Cell Overvoltage Detection Example ______________________________________________________________________________________ 12-Channel, High-Voltage Battery-Pack ...

  • Page 16

    High-Voltage Battery-Pack Fault Monitors Table 2. Undervoltage Threshold Selection THRESHOLD (V) Disabled 1.6 1.8 2.0 2.2 2.4 2.6 2.8 selection is sensed and stored at power-up and any subsequent change to the input pin status is ignored. Internal Linear ...

  • Page 17

    VAA POR RESET ASSERTED CHARGE-PUMP INTERNAL RESET ASSERTED INTERNAL POR RESET ASSERTED 1.1ms TYP VOLTAGE APPLIED TO DCIN SHDN ASSERTED CHECK SHDN 0.7ms TYP SHDN DEASSERTED REGULATOR ENABLED V < 3.0V AA CHECK V 0.2ms TYP AA 1.0ms TYP V ...

  • Page 18

    High-Voltage Battery-Pack Fault Monitors 22Ω TOP OF R LIMIT CELL STACK 22Ω SEE THE APPLICATION CIRCUIT DIAGRAM FOR PROPER CONNECTION LOCATION C DCIN 0.1µF 80V Figure 14. Battery Module Surge and Overvoltage Protection Circuit the SMCJ70 on the DCIN ...

  • Page 19

    MODULE N+1 DCIN C12 GND U C11 ALRM SHDN C0 AGND MODULE N DCIN C12 GND U C11 CP+ ALRM AGND Figure 15. GND Connection: AC-Coupled to Next Module, U DC-Coupled to Present ...

  • Page 20

    High-Voltage Battery-Pack Fault Monitors CP+ DEVICE (n) GND U Figure 17. Shutdown Circuit Interface . If SHDN < 0.6V, the MAX11080/ and then VDD U MAX11081 shut down. Figure 17 shows the shutdown circuit interface of two daisy-chain devices. ...

  • Page 21

    Cell 1 must always be populated. The designer can choose which cell inputs to leave unused. The example application circuits recommended are the most efficient configurations. At power-up, the part compares the voltage applied to each cell ...

  • Page 22

    High-Voltage Battery-Pack Fault Monitors Table 3. System Fault Modes CONDITION PCB or IC package open or short circuit—no stack load Random connection of cells to IC— no stack load Random connection of modules— no stack load Random connect/disconnect of ...

  • Page 23

    Table 4. FMEA Analysis (Note 6) PIN NAME ACTION NUMBER Open (or Disconnected) 1 DCIN Short to Pin 2 Open (or Disconnected Short to Pin 3 Open (or Disconnected) 3 N.C. Short to Pin 4 Open (or Disconnected) ...

  • Page 24

    High-Voltage Battery-Pack Fault Monitors Table 4. FMEA Analysis (Note 6) (continued) PIN NAME ACTION NUMBER Open (or Disconnected Short to Pin 9 Open (or Disconnected Short to Pin 10 Open (or Disconnected Short ...

  • Page 25

    Table 4. FMEA Analysis (Note 6) (continued) PIN NAME ACTION NUMBER Open (or Disconnected Short to Pin 14 Open (or Disconnected Short to Pin 15 Open (or Disconnected Short to Pin 16 Open (or ...

  • Page 26

    High-Voltage Battery-Pack Fault Monitors Table 4. FMEA Analysis (Note 6) (continued) PIN NAME ACTION NUMBER Open (or Disconnected) 20 OVSEL0 Short to Pin 21 Open (or Disconnected) 21 OVSEL1 Short to Pin 22 Open (or Disconnected) 22 OVSEL2 Short ...

  • Page 27

    Table 4. FMEA Analysis (Note 6) (continued) PIN NAME ACTION NUMBER Open (or Disconnected) No effect. 29 TST1 Short to Pin 30 Open (or Disconnected) No effect. 30 TST2 Short to Pin 31 Open (or Disconnected) 31 TOPSEL Short to ...

  • Page 28

    High-Voltage Battery-Pack Fault Monitors Pin Configuration TOP VIEW + DCIN N.C. 3 C12 4 C11 5 C10 6 MAX11080 C9 7 MAX11081 ...

  • Page 29

    ... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 29 © 2010 Maxim Integrated Products ...