MAX5982A datasheet(6/17 Pages) MAXIM

Part #	MAX5982A

Description	IEEE 802.3af/at-Compliant, Powered Device Interface

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Manufacturer	MAXIM [Maxim Integrated Products]

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6 ______________________________________________________________________________________

IEEE 802.3af/at-Compliant, Powered Device Interface

Controllers with Integrated Power MOSFET

Typical Operating Characteristics (continued)

(VIN = (VDD - VSS) = 54V, RDET = 24.9kω, RCLS = 615ω, and RSL = 60.4kω. RTN, WAD, PG, 2EC, WK, and ULP unconnected; all

voltages are referenced to VSS.)

INRUSH CONTROL WAVEFORM

WITH TYPE 2 CLASSIFICATION

MAX5982A toc10

VIN

50V/div

IRTN

100mA/div

VRTN

50V/div

V2EC

50V/div

VPG

50V/div

20ms/div

LED CURRENT vs. LED VOLTAGE

VLED (V)

4

3

2

1

5

10

15

20

25

0

05

RSL = 30.2kI

RSL = 60.4kI

INRUSH CONTROL WAVEFORM

WITH TYPE 2 CLASSIFICATION

MAX5982A toc11

VIN

50V/div

IRTN

100mA/div

VRTN

50V/div

V2EC

50V/div

400µs/div

DRIVING LED WITH ULP IN

POWER MODE

MAX5982A toc14

VULP

2V/div

ILED

5mA/div

10µs/div

LED CURRENT vs. RSL

RSL (kI)

60

55

50

45

40

35

30

25

20

15

10

5

13

16

19

22

25

10

065

SLEEP/ULTRA-LOW-POWER MODE

DELAY (MAX5982A)

MAX5982A toc15

VSL

1V/div

ILED

5mA/div

1s/div

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