STE12PS datasheet(33/44 Pages) STMICROELECTRONICS

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STE12PS

Electrical specifications and timings

33/44

Classification

Vcl

Classification probing voltage

15.9

18.1

Between port terminals

Icllim

Current limit during classification

Tcl

Classification time

One channel at a time,

classification

measurement has to be

considered as sampled

and integrated over this

time interval.

Ithcl0

Class0-1 current threshold

5.5

6.5

7.5

Ithcl1

Class1-2 current threshold

13.5

14.5

15.5

Ithcl2

Class2-3 current threshold

21.8

24.2

Ithcl3

Class3-4 current threshold

31.5

34.5

Ithcl4

Class4-0 current threshold

45.5

46.5

47.5

Powering

Pall

Maximum power per channel

15.4

See also classification

paragraph

(doubled in case of Boost

configuration)

Iinrush

Output current startup mode

400

450

Inrush current soft start

Imin

Power off current

Disconnect for t >

TPMDO (DC

disconnection method)

Acfre

AC disconnection sinusoidal

generator

Frequency spread related

to clock stability

Vacd

AC generator open line voltage

2.5

Vpp

Zac

AC impedance needed to

maintain power

100

Tmpdo

PD power maintenance request

drop out time limit

(Software programmable)

300

400

The STE12PS will not

remove power if the PD

maintenance signal is

absent for less than

300ms duration. If an

absence of power

maintenance signal has

been detected, the

STE12PS shall remove

power within 400ms

max(1)

Icut

Over load current

Pall/Vport

400

After time duration of

Tovld the STE12PS will

disconnect the power

from the port.

Table 12.

Electrical characteristics (continued)

Symbol

Parameter

Min.

Typ.

Max.

Units

Notes

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