MAX11081GUU+TW Maxim Integrated, MAX11081GUU+TW Datasheet - Page 13

• Manufacturer Part Number: MAX11081GUU+TW
• Description: Battery Management
• Manufacturer: Maxim Integrated
• Series: MAX11080, MAX11081r

Specifications of MAX11081GUU+TW

• Rohs: yes

voltage and undervoltage comparators. The threshold
references for the comparators are set by the UVSEL_
and OVSEL_ input pins. When one of the cell voltages
exceeds V
internal cell out-of-range signal for the given cell is set
and logically ORed with the same signal for the other
cell positions to create an overall out-of-range signal.
When any cells are out-of-range as indicated by the
internal out-of-range signal, an internal current source
begins to charge the capacitor C
Figure 7. Cell Differential Input and Comparator Block Diagram
Figure 8. C
C1
C
CELLS 2–12
CELL 1
n+1
HV
C
DLY
n
OV
CELL OUT-OF-RANGE
Circuit Block Diagram
or is below V
V
CELL
V
CELL
+
+
______________________________________________________________________________________
-
V
CELL
R
40MΩ
TYP
IN
1 TO 12
/(4 x R
6MΩ
TYP
*
SHIFT
UV
R
SHIFT
2MΩ
11
TYP
)
when V
AGND
DLY
V
V
AGND
CELL
CELL
UV
+
-
connected to the
/4
/4
OUT-OF-RANGE
is enabled, the
6.1µA
I
Battery-Pack Fault Monitors
CD
V
V
AA
SC
V
/4
12-Channel, High-Voltage
OV
/4
V
UV
CD pin. If the voltage at the CD pin reaches V
ALRM
AGND). Normally, the ALRM
with pulses occurring every 250µs. If all cell voltages
transition from out-of-range to in-range before the volt-
age at pin CD reaches V
the CD pin to GND. This action discharges C
because the delay had not yet expired, no alarm
occurs. Discharging C
time occurs for the next overvoltage or undervoltage
/4
SHORT-CIRCUIT
DETECTOR
L
V
THRESHOLD
CD
line is set to V
HYSTERESIS
HYSTERESIS
6kΩ
UNDERVOLTAGE
COMPARATOR
ENABLE
ALARM
AA
HYSTERESIS: MAX11080 = 75mV
DLY
(+2.4V minimum as referred to
CD
CD
ensures that the full delay
, an internal switch clamps
L
OUT-OF-RANGE
11
line is a heartbeat signal
MAX11081 = 9.375mV
CELL
C
DLY
OUT-OF-RANGE
DLY
CD
, the
and,
13