MAX5940BESA+T Maxim Integrated Products, MAX5940BESA+T Datasheet - Page 4

• Manufacturer Part Number: MAX5940BESA+T
• Description: IC IEEE 802.3AF PD INTFC 8-SOIC
• Manufacturer: Maxim Integrated Products

Specifications of MAX5940BESA+T

• Controller Type: Powered Device Interface Controller (PD)
• Interface: IEEE 802.3af
• Voltage - Supply: 48V
• Current - Supply: 1mA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

IEEE 802.3af PD Interface Controller
For Power-Over-Ethernet
(V
are at T
4
IN
-0.5
-1.0
-1.5
-2.0
-2.5
-3.0
-3.5
0.5
0.4
0.3
0.2
0.1
_______________________________________________________________________________________
= (GND - V
0
0
DETECTION CURRENT vs. INPUT VOLTAGE
1
0
A
R
= +25°C. All voltages are referenced to V
DISC
= 25.5kΩ
INPUT OFFSET CURRENT
3
2
vs. INPUT VOLTAGE
EE
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
) = 48V, GATE = PGOOD = PGOOD = OUT = OPEN, UVLO = V
5
4
I
IN
+ I
RDISC
7
6
9
8
Figure1. Effective Differential Input Resistance/Offset Current
I
OFFSET
11
10
I
INi + 1
I
INi
I
IN
1.010
1.008
1.006
1.004
1.002
1.000
0.998
0.996
0.994
0.992
0.990
50
40
30
20
10
I
EE
0
OFFSET
-40
, unless otherwise noted.)
0
dR
UVLO = V
i
≅
≅ I
(V
(I
INi
CLASSIFICATION CURRENT
5
-15
INi + 1
INi + 1
-
EE
V
dR
vs. INPUT VOLTAGE
NORMALIZED UVLO
vs. TEMPERATURE
INi
- I
i
- V
INPUT VOLTAGE (V)
TEMPERATURE (°C)
10
INi
INi
V
10
)
INi
)
=
(I
CLASS 4
CLASS 3
CLASS 2
CLASS 1
CLASS 0
15
INi + 1
1V
1V
Typical Operating Characteristics
35
- I
20
dR
INi
V
i
INi + 1
)
60
25
EE
(MAX5940B), T
30
85
V
250
200
150
100
IN
3.5
3.0
2.5
2.0
1.5
1.0
0.5
50
0
0
0
0
A
RESISTANCE vs. INPUT VOLTAGE
EFFECTIVE DIFFERENTIAL INPUT
= -40°C to +85°C. Typical values
PGOOD OUTPUT LOW VOLTAGE
2
5
INPUT VOLTAGE (V)
4
vs. CURRENT
I
SINK
10
6
(mA)
8
15
10
12
20