
M
IEEE 802.3af Power-Over-Ethernet
Interface/PWM Controller for Power Devices
6
_______________________________________________________________________________________
DETECTION CURRENT vs.
INPUT VOLTAGE
M
INPUT VOLTAGE (V)
D
8
6
4
2
0.10
0.20
0.30
0.40
0.05
0.15
0.25
0.35
0.45
0
0
10
R
DISC
= 25.5k
GND = V+ = V- = OUT
CLASSIFICATION CURRENT
vs. INPUT VOLTAGE
M
INPUT VOLTAGE (V)
C
25
20
15
5
15
25
35
10
20
30
40
0
10
30
CLASS 0
CLASS 1
CLASS 2
CLASS 3
CLASS 4
EFFECTIVE DIFFERENTIAL INPUT
RESISTANCE vs. INPUT VOLTAGE
M
INPUT VOLTAGE (V)
E
)
15
10
5
0.5
1.5
2.5
1.0
2.0
3.0
3.5
0
0
OFFSET CURRENT
vs. INPUT VOLTAGE
M
INPUT VOLTAGE (V)
O
μ
A
8
6
4
2
9
10
7
5
3
-2.0
-1.0
-3.0
-2.5
-1.5
-0.5
0
-3.5
1
11
NORMALIZED UVLO
vs. TEMPERATURE
M
TEMPERATURE (
°
C)
N
60
35
10
-15
0.996
1.004
0.992
0.994
1.000
1.008
1.002
0.998
1.006
1.010
0.990
-40
85
UVLO = V
EE
PGOOD OUTPUT LOW VOLTAGE
vs. CURRENT
M
I
SINK
(mA)
V
P
16
12
4
8
40
20
80
120
160
60
100
140
180
200
0
0
20
PGOOD OUTPUT LOW VOLTAGE
vs. CURRENT
M
I
SINK
(mA)
V
P
16
12
8
4
50
100
200
300
150
250
350
400
0
0
20
OUT LEAKAGE CURRENT
vs. TEMPERATURE
M
INPUT VOLTAGE (V)
O
60
35
10
-15
4
8
12
16
20
0
-40
85
V
OUT
= 67V
INRUSH CURRENT CONTROL
(V
IN
= 12V)
MAX5942A/B toc09
V
5V/div
I
INRUSH
100mA/div
V
OUT
10V/div
P
10V/div
1ms/div
Typical Operating Characteristics
(V
IN
= (GND - V
EE
) = 48V, GATE = PGOOD = PGOOD = OUT = OPEN, UVLO = V
EE
, V
DD
= 13V, NDRV floating, T
A
= T
MIN
to T
MAX
.
Typical values are at T
A
= +25
°
C. All voltages are referenced to V
EE
(for graphs 1
–
11 in the
Typical Operating Characteristics
); all
voltages are referenced to V- (for graphs 12
–
30 in the
Typical Operating Characteristics
), unless otherwise noted.