IEEE 802.3af/at PD Front End IC

Microsemi Proprietary and Confidential. PD70100/PD70200 Datasheet Revision 3.0

9

4.2.2

Detection Mode

Table 4 • Detection Mode

Parameter

Symbol

Min

Typ

Max

Units

Test Conditions/Comment

Detection is connected.

At this voltage range R

must be

DET

on.

DETRANGE

1.3

10.1

V

Measured between V and VPN

PP

IN

Detection Switch ON Resistance

PD-detection

R -on

DET

50

Ω

2.5 V ≤ (ΔV to VPN ≤ 10.1 V

PP

IN)

Measured between R

and VPN

DET

IN

Detection is Disconnected

R -off

DET

10.1

12.8

V

Measured between V and VPN

PP

IN

Detection Switch OFF Resistance

R -off

DET

2.0

MΩ

12.8 V ≤ (ΔV to VPN ) ≤ 57.0 V

PP

IN

Measured between R

and VPN

DET

IN

Input Offset Current

IOFFSET

16

μA

1.1 V to 10.1 V

−40 °C ≤ T ≤ 85 °C

J

IOFFSET

10

μA

1.1V to 10.1V

−40 °C ≤ T ≤ 55 °C

J

4.2.3

Classification Mode

Table 5 • Classification Mode

Parameter

Symbol

Min

Typ

Max

Units

Test Conditions/Comment

Classification Current Source, Turn ON

ThresholdRangeMeasured at VPP

V -

TH

low-on

11.4

13.7

V

Turn on for any I

while

CLASS

V increases

PP

Classification Current Source, Turn OFF

ThresholdRangeMeasured at VPP

V -

TH

high-

off

20.9

23.9

V

Turn off while VPP

increases

Current Limit Threshold

I

-

CLASS

LIM

50.0

68

80.0

mA

Input Current I When Classification

PP

Function is Disabled

I

-

CLASS

DIS

4.0

mA

Class 0

R

= Disconnect

CLASS

Input Current I When Classification

PP

Function is Enabled

I

-

CLASS

EN

9.0

10.5

12.0

mA

Class 1

R

= 133 Ω ± 1%

CLASS

17.0

18.5

20.0

mA

Class 2

R

= 69.8 Ω ± 1%

CLASS

26.0

28.0

30.0

mA

Class 3

R

= 45.3 Ω ± 1%

CLASS

36.0

40.0

44.0

mA

Class 4

R

= 30.9 Ω ± 1%

CLASS