LTC4292 datasheet(6/40 Pages) AD

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LTC4291-1/LTC4292

Rev 0

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SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

tME1

Mark Event Duration (Except Last Mark

Event)

(Note 11)

8.6

tME2

Last Mark Event Duration

(Note 11)

tPON

Power On Delay, Auto Mode

From End of Valid Detect to End of Valid Inrush

(Note 14)

400

tAUTO_PSE1

Autoclass Power Measurement Start

From End of Inrush to Beginning of Autoclass

Power Measurement

1.4

1.6

tAUTO_PSE2

Autoclass Power Measurement End

From End of Inrush to End of Autoclass Power

Measurement

3.1

3.5

tAUTO_WINDOW

Autoclass Average Power Sliding

Window

0.15

0.2

0.3

tED

Fault Delay

From Power On Fault to Next Detect

1.0

1.3

1.5

tSTART

Maximum Current Limit Duration

During Inrush

tCUT

Maximum Overcurrent Duration After

Inrush

Maximum Overcurrent Duty Cycle

5.8

6.3

6.7

tLIM

Maximum Current Limit Duration After

Inrush

(Note 12)

Type 3, tLIMn = 8h

Type 4, tLIMn = 5h

tMPS

Maintain Power Signature (MPS) Pulse

Width Sensitivity

Current Pulse Width to Reset Disconnect Timer

(Note 8)

1.6

3.6

tDIS

Maintain Power Signature (MPS)

Dropout Time

(Note 5)

320

350

380

tMSD

Masked Shut Down Delay

6.5

µs

I2C Watchdog Timer Duration

1.5

Minimum Pulse Width for Masked Shut

Down

µs

Minimum Pulse Width for RESET

4.5

µs

I2C Timing (Note 7)

fSCLK

Clock Frequency

MHz

Bus Free Time

Figure 5 (Note 9)

480

Start Hold Time

Figure 5 (Note 9)

240

SCL Low Time

Figure 5 (Note 9)

480

SCL High Time

Figure 5 (Note 9)

240

SDAIN Data Hold Time

Figure 5 (Note 9)

Data Clock to SDAOUT Valid

Figure 5 (Note 9)

130

Data Set-Up Time

Figure 5 (Note 9)

Start Set-Up Time

Figure 5 (Note 9)

240

Stop Set-Up Time

Figure 5 (Note 9)

240

SCL, SDAIN Rise Time

Figure 5 (Note 9)

120

SCL, SDAIN Fall Time

Figure 5 (Note 9)

Fault Present to INT Pin Low

(Notes 9, 10)

150

Stop Condition to INT Pin Low

(Notes 9, 10)

1.5

µs

ELECTRICAL CHARACTERISTICS The

denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. AGNDP – VEE = 54V and VDD – DGND = 3.3V unless otherwise noted.

(Notes 3 and 4)

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