MP8020 – IEEE 802.3af/at/bt, PoE, POWERED DEVICE INTERFACE

MP8020 Rev. 1.0

MonolithicPower.com

5

2/17/2022

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ELECTRICAL CHARACTERISTICS

VDD = 54V, TJ = -40°C to +125°C (6), typical values are tested at TJ = 25°C, unless otherwise noted.

Parameter

Symbol Condition

Min

Typ

Max

Units

Detection

Detection on

VDET-ON

VDD rising

1

1.4

V

Detection off

VDET-OFF VDD rising

10.1

11

V

Bias current

IBIAS

VDD = 10.1V, not in mark event,

measure ISUPPLY

12

μA

Detection resistance

RDET

VDD from 1.5V to 10.1V,

calculate with ΔV / ΔI

24.1

25

26.1

kΩ

Classification

Classification stability time

Stable output voltage (VOUT)

from VCL-ON to CLSA or CLSB

0.4

1

ms

CLSA and CLSB class

voltage (VCLASS) output

voltage

VCLSA

13V < VDD < 21V,

1mA < ICLASS < 44mA

1.11

1.16

1.21

V

VCLSB

Classification current for

CLSA and CLSB

ICLASS

Measure input current, 13 ≤ VDD ≤ 21V, guaranteed by VCLSA and VCLSB

RCLASS = 578Ω, 13 ≤ VDD ≤ 21V

1.8

2

2.4

mA

RCLASS = 110Ω, 13 ≤

VDD ≤21V

9.9

10.55

11.3

RCLASS = 62Ω, 13 ≤

VDD ≤ 21V

17.7

18.7

19.8

RCLASS = 41.2Ω, 13 ≤

VDD ≤21V

26.6

28.15

29.7

RCLASS = 28.7Ω, 13 ≤

VDD ≤21V

38.2

40.4

42.6

Long first class event

tLCE

Determine type 3 and type 4

PoE from trigger VCL-ON

76

81.5

87

ms

Classification lower

threshold

VCL-ON

Regulator turns on, VDD rising

12

12.5

13

V

Classification lower

threshold hysteresis

VCL-L-HYS Low threshold hysteresis

1.3

1.5

1.7

V

Classification upper

threshold

VCL-OFF

Regulator turns off, VDD rising

21

22

23

V

Classification upper

threshold hysteresis

VCL-H-HYS High threshold hysteresis

0.5

V

Mark event reset threshold

VMARK-L

4.5

5

5.5

V

Max mark event voltage

VMARK-H

10.5

11

11.5

V

Mark event current

IMARK

0.5

1.1

2

mA

Mark event resistance

RMARK

2-point measurement at 5.5V

and 10.1V, calculate with

ΔV / ΔI

12

kΩ

IC supply current during

classification

IIN-CLASS

VDD = 17.5V, float CLSA and

CLSB

180

300

μA

Class leakage current

ILEAKAGE

VCLSA = VCLSB = 0V, VDD = 57V,

test both CLSA and CLSB

1

μA