MAX11080GUU+ Maxim Integrated Products, MAX11080GUU+ Datasheet - Page 14

• 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
event. Figure 8 summarizes the C
Once the ALRM
(+2.4V minimum as referred to AGND), it transitions
back to a heartbeat signal only after all battery cells
meet the following condition:
Examples of cell-voltage readings and their effect on
the alarm status are shown in Figures 9 and 10 for sin-
gle- and multiple-cell systems. In the case where an
upper module is forwarding an active alarm condition
down the daisy-chain, that condition continues to be
propagated toward the host regardless of the alarm
state of any lower module. Furthermore, to circumvent
the possibility of a short-circuited capacitor connected
to CD preempting the fault-time validation process, a
redundant built-in delay of 4s nominal is asserted as a
backup. If the V
an out-of-range event, the alarm becomes active.
The alarm trigger delay time is calculated according to
the following equations:
Table 1. Overvoltage Threshold Selection
14
THRESHOLD (V)
______________________________________________________________________________________
(V
OV
3.3
3.4
3.5
3.6
3.7
3.8
3.9
4.0
4.1
4.2
4.3
4.4
4.5
4.6
4.7
4.8
- V
HYS
t
CD
DLY
L
) > V
pin is forced high due to an alarm
threshold is not reached within 4s of
= (V
Programmable Delay Time
CELL(ALL)
CD
x C
OVSEL3
DLY
DLY
> (V
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
)/I
CD
circuit.
UV
+ V
HYS
)
OVSEL2
OVERVOLTAGE SELECTION
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
The effective I
typical and the threshold voltage, V
The V
to the resistor in series with the CD pin as shown in
Figure 8. The threshold voltage seen at the pin is
approximately 1.18V due to the drop associated with
the typical I
MAX11080/MAX11081 can operate with capacitor val-
ues from 15nF (3.0ms) to 16.5µF (3.32s). Each capaci-
tor should have a voltage tolerance of 5V minimum.
The overvoltage and undervoltage threshold selection
is configured through the OVSEL_ and UVSEL_ inputs.
The overvoltage selection can be configured from 3.3V
to 4.8V in 100mV increments. The undervoltage thresh-
old can be configured from 1.6V to 2.8V in 200mV
increments. The undervoltage detection can also be
disabled. See Tables 1 and 2 for the proper configura-
tion settings.
Immunity to unintended changes in the threshold volt-
age setting (due to accidental pin-to-pin short circuits,
for example) is provided. The customer-programmed
CD
threshold is specified at an internal node prior
Cell-Voltage Threshold Selection
CD
CD
C
OVSEL1
DLY
value and the 6kΩ resistor. The
value of the current source is 6.1µA
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
= (t
DLY
x I
CD
)/V
CD,
CD
is 1.23V typical.
OVSEL0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1