MAX5986A datasheet(9/24 Pages) MAXIM

Part #	MAX5986A

Description	IEEE 802.3af-Compliant, High-Efficiency, Class 1/Class 2, PDs with Integrated DC-DC Converter

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Manufacturer	MAXIM [Maxim Integrated Products]

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MAX5986A/MAX5986B/MAX5987A

IEEE 802.3af-Compliant, High-Efficiency, Class 1/

Class 2, PDs with Integrated DC-DC Converter

9

Maxim Integrated

Typical Operating Characteristics (continued)

(TA = +25°C, unless otherwise noted.)

CLASSIFICATION SETTLING TIME

MAX5986A toc06

VDD

10V/div

GND

IDD

10mA/div

0mA

400µs/div

CLASSIFICATION CURRENT

vs. INPUT VOLTAGE

INPUT VOLTAGE (V)

18.6

17.1

15.6

14.1

10.42

10.44

10.46

10.48

10.50

10.52

10.54

10.56

10.58

10.60

10.40

12.6

20.0

LED CURRENT vs. RSL

RSL (kI)

70

60

50

40

30

20

12

18

20

24

28

8

10

80

LED CURRENT vs. LED VOLTAGE

LED VOLTAGE (V)

5.25

3.50

1.75

10

15

20

25

5

0

7.00

RSL = 30.2kI

RSL = 60.4kI

EFFICIENCY vs. LOAD CURRENT

(MAX5986A, VOUT = 5V)

LOAD CURRENT (mA)

0.8 0.9 1.0

0.7

0.6

0.4 0.5

0.2 0.3

0.1

60

65

70

75

80

85

90

95

100

0

VIN = 12V

VIN = 36V

VIN = 57V

VIN = 48V

INRUSH CURRENT LIMIT vs. VCC VOLTAGE

VCC (V)

42

36

30

24

18

12

6

44

48

52

56

60

40

048

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