MAX11080 데이터 시트보기 (PDF) - Maxim Integrated

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MAX11080

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

Maxim Integrated 

12-Channel, High-Voltage

Battery-Pack Fault Monitors

VAA POR RESET

ASSERTED

CHARGE-PUMP

INTERNAL RESET

ASSERTED

INTERNAL POR

RESET ASSERTED

VOLTAGE APPLIED

TO DCIN

SHDN ASSERTED

CHECK SHDN

SHDN DEASSERTED

REGULATOR ENABLED

VAA < 3.0V

0.2ms TYP

CHECK VAA

1.8ms TYP

VAA > 3.0V

VAA POR RESET

DEASSERTED

REGULATOR IN

REGULATION

16kHz OSCILLATOR

ENABLED

OVSEL/UVSEL

INPUTS LATCHED

1.1ms TYP

0.7ms TYP

CHARGE-PUMP

ENABLED

(VDDU - GNDU) < 2.6V

CHECK (VDDU -

GNDU)

(VDDU - GNDU) > 2.6V

CHARGE-PUMP

INTERNAL RESET

DEASSERTED

VDDU WITHIN

REGULATION

INTERNAL POR

RESET DEASSERTED

ALARM STATE

DISABLED

1.0ms TYP

FAULT: ALRML

ASSERTED UNTIL

NEXT ACTIVE POR

START OVERVOLTAGE

COMPARATOR TEST

CONNECT GROUND AS

OV THRESHOLD

NO

ALL

OV COMPARATORS

OUTPUT HIGH?

YES

DISCONNECT GROUND

AS OV THRESHOLD

START CELL SHORT-

CIRCUIT TEST

1.0ms TYP

FOR EACH CELL

INPUT N

NEXT INPUT N

SHORT-CIRCUIT

COMPARATOR [N]

YES

DETECTS SHORT?

NO

NEXT INPUT N

INPUT [N] UV

COMPARATOR

DISABLED

CELL SHORT-CIRCUIT

TEST DONE

MAX11080/MAX11081

FULLY FUNCTIONAL

NUMBER OF CELLS

DETECTED

Figure 12. Linear Regulator Power-Up Sequence

are not guaranteed until a minimum of 6.0V is applied to

the DCIN pin.

The linear regulator also incorporates a thermal shutdown

feature. If the MAX11080/MAX11081 die temperature

rises above +145°C, the device shuts down. After a ther-

mal 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.

DCIN and GNDU Supply Connections

A surge voltage is produced by the electric motor

during regenerative braking conditions. The

MAX11080/MAX11081 are designed to tolerate an

absolute maximum of 80V under this condition. The

MAX11080/MAX11081 should be protected against high-

er voltages with an external voltage suppressor such as

OVERVOLTAGE

COMPARATOR TEST

DONE

VAA AND INTERNAL

POR INACTIVE

FALLING DCIN

VOLTAGE

VAA > 2.8V

CHECK VAA

VAA < 2.8V

VAA AND INTERNAL

POR ACTIVE

OSCILLATOR,

CHARGE-PUMP,

DIGITAL LOGIC,

AND ALARM PULSE

DISABLED

Figure 13. Low DCIN POR Event

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