Datasheet

MAX5982A/MAX5982B/MAX5982C
6 ______________________________________________________________________________________
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.
)
INRUSH CONTROL WAVEFORM
WITH TYPE 2 CLASSIFICATION
MAX5982A toc10
V
IN
50V/div
I
RTN
100mA/div
V
RTN
50V/div
V
2EC
50V/div
V
PG
50V/div
20ms/div
LED CURRENT vs. LED VOLTAGE
MAX5982A toc13
V
LED
(V)
I
LED
(mA)
4321
5
10
15
20
25
0
05
R
SL
= 30.2kI
R
SL
= 60.4kI
INRUSH CONTROL WAVEFORM
WITH TYPE 2 CLASSIFICATION
MAX5982A toc11
V
IN
50V/div
I
RTN
100mA/div
V
RTN
50V/div
V
2EC
50V/div
400µs/div
DRIVING LED WITH ULP IN
POWER MODE
MAX5982A toc14
V
ULP
2V/div
I
LED
5mA/div
10µs/div
LED CURRENT vs. R
SL
MAX5982A toc12
R
SL
(kI)
I
LED
(mA)
60555045403530252015105
13
16
19
22
25
10
06
5
SLEEP/ULTRA-LOW-POWER MODE
DELAY (MAX5982A)
MAX5982A toc15
V
SL
1V/div
I
LED
5mA/div
1s/div