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IEEE 802.3af/at-Compliant, Powered Device Interface
Controllers with Integrated Power MOSFET
Typical Operating Characteristics (continued)
(V IN = (V DD - V SS ) = 54V, R DET = 24.9kω, R CLS = 615ω, and R SL = 60.4kω. RTN, WAD, PG, 2EC , WK , and ULP unconnected; all
voltages are referenced to V SS. )
25
INRUSH CONTROL WAVEFORM
WITH TYPE 2 CLASSIFICATION
MAX5982A toc10
20ms/div
LED CURRENT vs. LED VOLTAGE
V IN
50V/div
V 2EC
50V/div
V PG
50V/div
V RTN
50V/div
I RTN
100mA/div
INRUSH CONTROL WAVEFORM
WITH TYPE 2 CLASSIFICATION
MAX5982A toc11
400μs/div
LED CURRENT vs. R SL
V IN
50V/div
V 2EC
50V/div
V RTN
50V/div
I RTN
100mA/div
20
R SL = 30.2k I
25
22
15
10
5
R SL = 60.4k I
19
16
13
0
0
1
2
3
4
5
10
0 5 10 15 20 25 30 35 40 45 50 55 60 65
V LED (V)
DRIVING LED WITH ULP IN
POWER MODE
MAX5982A toc14
V ULP
2V/div
R SL (k I )
SLEEP/ULTRA-LOW-POWER MODE
DELAY (MAX5982A)
MAX5982A toc15
V SL
1V/div
10μs/div
I LED
5mA/div
1s/div
I LED
5mA/div
6
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