MAX11080GUU/V(2009) データシートの表示（PDF） - Maxim Integrated

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MAX11080GUU/V
(Rev.:2009)

12-Channel, High-Voltage Battery-Pack Fault Monitor

Maxim Integrated 

12-Channel, High-Voltage Battery-Pack

Fault Monitor

pump reaches regulation in approximately 3ms. The

MAX11080 associated with the top module in the bat-

tery pack is 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 is ready for operation. When

the charge pump achieves regulation of 3.3V between

VDDU and GNDU, it switches to a standby mode until

the voltage drops by about 35mV. The specified accu-

racy and full operation of the MAX11080 are not guar-

anteed until a minimum of 6.0V is applied to the DCIN

pin.

The linear regulator also incorporates a thermal shut-

down feature. If the MAX11080 die temperature rises

above +145°C, the device shuts down. After a thermal

shutdown, the die temperature must cool 15°C below

the shutdown temperature before the device restarts.

Figure 12 shows the linear regulator power-up sequence

and Figure 13 shows the low DCIN POR event.

POR ACTIVE

VOLTAGE APPLIED

TO DCIN

SHDN ACTIVE

FAULT THRESHOLDS

READ

16kHz OSCILLATOR

ENABLED

CHECK SHDN

CHARGE-PUMP

ENABLED

REGULATOR

ENABLED

VAA < 3.0V

3ms DELAY

TOP BOARD

IDENTIFIED

CHECK VAA

OVERVOLTAGE

COMPARATOR

SELF-TEST

1ms DELAY

POR CLEARED

NUMBER OF CELLS

DETECTED

MAX11080 FULLY

FUNCTIONAL

Figure 12. Linear Regulator Power-Up Sequence

POR INACTIVE

FALLING DCIN

VOLTAGE

VAA > 2.8V

CHECK VAA

POR ACTIVE

OSCILLATOR,

CHARGE PUMP,

DIGITAL LOGIC,

AND ALARM PULSE

DISABLED

Figure 13. Low DCIN POR Event

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