SI3454 View Datasheet(PDF) - Silicon Laboratories
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SI3454 Datasheet PDF : 57 Pages
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Si3454
Table 4. AC Timing Specifications
Parameter
Symbol
Test Condition
Min Typ
Time from detect command or
Detection Delay Cycle
tDET_CYCLE
when PD is connected to port to
when detection process is com-
70
—
pleted.* See Figure 6.
Detection Time
Time required to measure PD
tDETECT
signature resistance.*
See Figure 6.
—
70
Classification Delay
Cycle
Time from successful detect in
Semi-AUTO mode to classifica-
tion complete.*
10
—
tCLASS_CYCLE
See Figure 6.
Time from classify command in
manual mode to class complete.* 10
—
See Figure 6.
Classification Time
Inrush Time
Overload Time Limit
Disconnect Delay
Timer Duration
tCLASS
See Figure 6*
10
—
tINRUSH
—
60
tCUT
—
60
tCMPS
—
360
1.71 ms times the value of
tLIM
TLIM12 (TLIM34) field rounded 0
—
to nearest integer.
DC Disconnect Minimum
Pulse Width Sensitivity
SHDN Pin Assertion
Threshold (Time from
SHDN falling edge to port
turn off)
tDC_SEN
TSHDN
VDRAINn = –48 V,
VSENSEn – AGND > 5 mV
Shutdown Priority Mode
—
—
1
—
*Note: This timing is determined by the MCU, and the clock reference is guaranteed to be 1 ms ±5%.
Max
400
—
30
30
20
—
70
—
26
3
50
Unit
ms
ms
ms
ms
ms
ms
ms
ms
ms
ms
µs
10
Rev. 1.1
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