MAX11080GUU+ Maxim Integrated Products, MAX11080GUU+ Datasheet - Page 16

• 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
Table 2. Undervoltage Threshold Selection
selection is sensed and stored at power-up and any
subsequent change to the input pin status is ignored.
The MAX11080/MAX11081 have an internal linear regula-
tor for generating the internal supply from DCIN (Figure
11). The regulator can accept a supply voltage on the
DCIN pin from +6.0V to +72V, which it regulates to 3.3V
to run the voltage-detection system, control logic, and
low-side alarm-pulse interface. When the SHDN pin is not
active and a sufficient voltage is applied to DCIN, the out-
put of the regulator becomes active. The regulator is
paired with a power-on-reset (POR) circuit that senses its
output voltage and holds the MAX11080/MAX11081 in a
reset state until the internal supply has reached a sustain-
able threshold of +3.0V (±5%). The internal comparators
have built-in hysteresis that can reject noise on the supply
Figure 11. Internal Linear Regulator Block Diagram
16
______________________________________________________________________________________
AGND
SHDN
DCIN
THRESHOLD (V)
Disabled
1.6
1.8
2.0
2.2
2.4
2.6
2.8
DIE OVERTEMPERATURE
+6.0V TO +72V
DETECT
Internal Linear Regulator
POR THRESHOLD
REGULATOR
ENABLE
REGULATOR
LINEAR
REFERENCE
BANDGAP
+3.0V ±5%
UVSEL2
0
0
0
0
1
1
1
1
CHARGE-PUMP
COMPARATOR
POR
ENABLE
INTERNAL +3.3V
UNDERVOLTAGE SELECTION
line. Because secondary metal batteries are never fully
discharged to 0V, the MAX11080/MAX11081 are
designed for a hot-swap insertion of the battery cells.
Once the POR threshold is reached, approximately 1ms
later the internal reset signal disables, the internal oscilla-
tor starts, and the charge pump begins operating. The
charge pump reaches regulation in approximately 3ms.
The MAX11080/MAX11081 associated with the top mod-
ule in the battery pack are identified as detailed in the
TOPSEL Function section. This is followed by a self-test of
the overvoltage comparators and detection of the number
of cells connected. At this time in the power-on
sequence, the MAX11080/MAX11081 are ready for oper-
ation. When the charge pump achieves regulation of 3.3V
between VDD
until the voltage drops by about 35mV. The specified
accuracy and full operation of the MAX11080/MAX11081
CHARGE
PUMP
HYSTERESIS
35mV
UVSEL1
0
0
1
1
0
0
1
1
U
VAA POR/
and GND
+3.3V TO
GND
U
U
, it switches to a standby mode
2.6V
CP POR
COMPARATOR
INTERNAL
POR/
UVSEL0
V
GND
VDD
0
1
0
1
0
1
0
1
AA
CP_POR/
U
U