MAX11080GUU+ Maxim Integrated Products, MAX11080GUU+ Datasheet - Page 12

• Manufacturer Part Number: MAX11080GUU+
• Description: IC LI/BATTERY MANAGEMENT 38TSSOP
• Manufacturer: Maxim Integrated Products

Specifications of MAX11080GUU+

• Function: Battery Monitor
• Battery Type: Lithium-Ion (Li-Ion)
• Voltage - Supply: 6 V ~ 72 V
• Operating Temperature: -40°C ~ 105°C
• Mounting Type: Surface Mount
• Package / Case: 38-TSSOP (0.173", 4.40mm Width)
• Product: Charge Management
• Operating Supply Voltage: 6 V to 72 V
• Supply Current: 0.05 uA
• Maximum Operating Temperature: + 105 C
• Minimum Operating Temperature: - 40 C
• Charge Safety Timers: No
• Mounting Style: SMD/SMT
• Temperature Monitoring: No
• Uvlo Start Threshold: 1.6 V
• Uvlo Stop Threshold: 2.8 V
• No. Of Batteries: 12
• Supply Voltage Range: 6V To 72V
• Battery Ic Case Style: TSSOP
• No. Of Pins: 38
• Operating Temperature Range: -40°C To +105°C
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

12-Channel, High-Voltage
Battery-Pack Fault Monitors
Figure 6. ESD Diode Diagram
Figure 1 shows the functional diagram; Figure 2 shows
the application circuit diagram for a 12-cell system
while Figure 3 shows the application circuit design for a
10-cell system and Figure 4 for an 8-cell system. Figure
5 is the application schematic for the battery module
system with redundant fault detection and Figure 6 is
the ESD diode diagram.
The MAX11080/MAX11081 are battery-pack fault-monitor
ICs capable of monitoring up to 12 Li+ battery cells.
These devices are designed to provide an overvoltage or
undervoltage alarm indicator when any of the cells cross
the user-selectable threshold for longer than the config-
ured decision delay interval. The MAX11080/MAX11081
also incorporates daisy-chain bus for use in high-voltage
stacked-battery operation. The daisy-chain bus relays
12
______________________________________________________________________________________
C1 TO C11
AGND
DCIN
C12
HV
C0
Detailed Description
6V
Architectural Overview
ESD DIODES
MAX11080
MAX11081
80V
80V
80V
4V
4V
shutdown and alarm communication across up to 31
stacked modules without the need for isolation between
each module. This results in a simplified system with
reduced cost. The MAX11080/MAX11081 are ideal as an
ultra-low-power, redundant cell-fault monitor that is the
perfect complement to the MAX11068 high-voltage bat-
tery measurement IC. Both ICs in concert form a powerful
Li+ battery system monitor with redundant overvoltage
and undervoltage fault detection.
Figure 7 summarizes the fault-detection mechanism for
a set of differential cell inputs in the MAX11080/
MAX11081.
First, the differential cell inputs are attenuated by a fac-
tor of four while being level shifted and converted to a
single-ended voltage referenced to AGND. The ground-
referenced voltage is then connected to a set of over-
6V
6V
Overvoltage and Undervoltage
VDD
CP+
ALRM
GND
CP-
V
ALRM
SHDN
CD
TOPSEL
OVSEL0/1/2/3
UVSEL0/1/2
AA
Fault Detection
U
U
U
L