Datasheet

MAX5941A/MAX5941B
IEEE 802.3af-Compliant Power-Over-Ethernet
Interface/PWM Controller for Power Devices
6 _______________________________________________________________________________________
DETECTION CURRENT vs. INPUT VOLTAGE
MAX5941A/B toc01
INPUT VOLTAGE (V)
DETECTION CURRENT (mA)
8642
0.10
0.20
0.30
0.40
0.05
0.15
0.25
0.35
0.45
0
010
R
DISC
= 25.5k
Ω
GND = V+ = V- = OUT
CLASSIFICATION CURRENT
vs. INPUT VOLTAGE
MAX5941A/B toc02
INPUT VOLTAGE (V)
CLASSIFICATION CURRENT (mA)
252015
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
MAX5941A/B toc03
INPUT VOLTAGE (V)
EFFECTIVE DIFFERENTIAL INPUT RESISTANCE (MΩ)
15105
0.5
1.5
2.5
1.0
2.0
3.0
3.5
0
0
OFFSET CURRENT
vs. INPUT VOLTAGE
MAX5941A/B toc04
INPUT VOLTAGE (V)
OFFSET CURRENT (µA)
8642910753
-2.0
-1.0
-3.0
-2.5
-1.5
-0.5
0
-3.5
111
NORMALIZED UVLO
vs. TEMPERATURE
MAX5941A/B toc05
TEMPERATURE (
°
C)
NORMALIZED UVLO
603510-15
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
MAX5941A/B toc06
I
SINK
(mA)
V
PGOOD
(mV)
161248
40
20
80
120
160
60
100
140
180
200
0
020
PGOOD OUTPUT LOW VOLTAGE
vs. CURRENT
MAX5941A/B toc07
I
SINK
(mA)
V
PGOOD
(mV)
161284
50
100
200
300
150
250
350
400
0
020
OUT LEAKAGE CURRENT
vs. TEMPERATURE
MAX5941A/B toc08
INPUT VOLTAGE (V)
OUT LEAKAGE CURRENT (nA)
603510-15
4
8
12
16
20
0
-40 85
V
OUT
= 67V
INRUSH CURRENT CONTROL
(V
IN
= 12V)
MAX5941toc09
V
GATE
5V/div
I
INRUSH
100mA/div
V
OUT
10V/div
P
GOOD
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.)