Datasheet

MAX5986A–MAX5986C/MAX5987A
IEEE 802.3af-Compliant, High-Efficiency, Class 1/
Class 2, PDs with Integrated DC-DC Converter
9Maxim Integrated
Typical Operating Characteristics (continued)
(T
A
= +25°C, unless otherwise noted.)
CLASSIFICATION SETTLING TIME
MAX5986A toc06
V
DD
10V/div
GND
I
DD
10mA/div
0mA
400µs/div
CLASSIFICATION CURRENT
vs. INPUT VOLTAGE
MAX5986A toc05
INPUT VOLTAGE (V)
CLASSIFICATION CURRENT (mA)
18.617.115.614.1
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. R
SL
MAX5986A toc08
R
SL
(kI)
LED CURRENT (mA)
706050403020
12
18
20
24
28
8
10 80
LED CURRENT vs. LED VOLTAGE
MAX5986A toc09
LED VOLTAGE (V)
LED CURRENT (mA)
5.253.501.75
10
15
20
25
5
0 7.00
R
SL
= 30.2kI
R
SL
= 60.4kI
EFFICIENCY vs. LOAD CURRENT
(MAX5986C, V
OUT
= 12V)
MAX5986A toc10
LOAD CURRENT (A)
EFFICIENCY (%)
0.60.50.1 0.2 0.3 0.4
65
70
75
80
85
90
95
100
60
0 0.7
V
IN
= 36V
V
IN
= 48V
V
IN
= 57V
INRUSH CURRENT LIMIT vs. V
CC
VOLTAGE
MAX5986A toc07
V
CC
(V)
INRUSH CURRENT (mA)
4236302418126
44
48
52
56
60
40
04
8