IEEE 802.3af-Compliant Power-Over-Ethernet

Interface/PWM Controller for Power Devices

6

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DETECTION CURRENT vs. INPUT VOLTAGE

INPUT VOLTAGE (V)

8

6

4

2

0.10

0.20

0.30

0.40

0.05

0.15

0.25

0.35

0.45

0

010

Ω

GND = V+ = V- = OUT

CLASSIFICATION CURRENT

vs. INPUT VOLTAGE

INPUT VOLTAGE (V)

25

20

15

5

15

25

35

10

20

30

40

0

10

30

CLASS 0

CLASS 1

CLASS 2

CLASS 3

CLASS 4

EFFECTIVE DIFFERENTIAL INPUT

RESISTANCE vs. INPUT VOLTAGE

INPUT VOLTAGE (V)

15

10

5

0.5

1.5

2.5

1.0

2.0

3.0

3.5

0

0

OFFSET CURRENT

vs. INPUT VOLTAGE

INPUT VOLTAGE (V)

8

6

4

29

10

7

5

3

-2.0

-1.0

-3.0

-2.5

-1.5

-0.5

0

-3.5

111

NORMALIZED UVLO

vs. TEMPERATURE

TEMPERATURE (

°C)

60

35

10

-15

0.996

1.004

0.992

0.994

1.000

1.008

1.002

0.998

1.006

1.010

0.990

-40

85

PGOOD OUTPUT LOW VOLTAGE

vs. CURRENT

16

12

48

40

20

80

120

160

60

100

140

180

200

0

020

PGOOD OUTPUT LOW VOLTAGE

vs. CURRENT

16

12

8

4

50

100

200

300

150

250

350

400

0

020

OUT LEAKAGE CURRENT

vs. TEMPERATURE

INPUT VOLTAGE (V)

60

35

10

-15

4

8

12

16

20

0

-40

85

INRUSH CURRENT CONTROL

MAX5941toc09

5V/div

100mA/div

10V/div

10V/div

1ms/div

Typical Operating Characteristics

voltages are referenced to V- (for graphs 12–30 in the Typical Operating Characteristics), unless otherwise noted.)