MAX5945EAX+ Maxim Integrated Products, MAX5945EAX+ Datasheet - Page 4

• Manufacturer Part Number: MAX5945EAX+
• Description: IC NETWORK PWR CTRL 36-SSOP
• Manufacturer: Maxim Integrated Products

Specifications of MAX5945EAX+

• Controller Type: Network Power Controller
• Interface: I²C
• Voltage - Supply: 3.3V
• Current - Supply: 4.2mA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 36-SSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Quad Network Power Controller
for Power-Over-LAN
ELECTRICAL CHARACTERISTICS (continued)
(AGND = +32V to +60V, V
values are at AGND = +48V, DGND = +48V, V
negative otherwise.)
4
AC Load Disconnect
Threshold (Note 4)
Oscillator Buffer Gain
OSC_IN Fail Threshold
(Note 5)
OSC_IN Input Resistance
OSC_IN Input Capacitance
Load Disconnect Timer
DETECTION
Detection Probe Voltage
(First Phase)
Detection Probe Voltage
(Second Phase)
Current-Limit Protection
Short-Circuit Threshold
Open-Circuit Threshold
Resistor Detection Window
Resistor Rejection Window
CLASSIFICATION
Classification Probe Voltage
Current-Limit Protection
Classification Current
Thresholds
DIGITAL INPUTS/OUTPUTS (REFERRED to DGND)
Digital Input Low
Digital Input High
_______________________________________________________________________________________
PARAMETER
EE
= 0V, V
V
SYMBOL
C
I
OS C _F AI L
D_OPEN
R
V
V
I
A
Z
R
I
OSC_IN
I
V
t
ACTH
ClLIM
DISC
DLIM
DBAD
V
DPH1
DPH2
V
I
V
OSC
OSC
DCP
DOK
CL
CL
IH
IL
DD
to DGND = +3.3V, all voltages are referenced to V
Current into DET_, ACD_EN_ bit = high,
OSC_IN = 2.2V
V
C
Port will not power on if V
ACD_EN_ bit = high
OSC_IN input impedance when all the ACD_EN_
are active
Time from V
< I
V
V
phase
V
current through DET_
If V
p hase a shor t ci r cui t to AG N D i s d etected
First point measurement current threshold for
open condition
(Note 7)
Detection rejects lower values
Detection rejects higher values
V
V
measure current through DET_
Classification current
thresholds between
classes
DET_
AGND
AGND
DET_
AGND
DET_
DET
DD
ACTH
A GN D
= (DGND + 3.3V), T
= 400nF
/ V
= V
= V
- V
- V
- V
to gate shutdown (Note 6)
OSC_IN
- V
AGND
AGND
DET_
DET_
DET_
OU T
SENSE
during the first detection phase
during the second detection
during classification
, during detection, measure
, during classification,
, ACD_EN_ bit = high,
< V
CONDITIONS
< V
D C P
DCTH
after the fi r st d etecti on
OSC_IN
A
Class 0, class 1
Class 1, class 2
Class 2, class 3
Class 3, class 4
>Class 4
or current into DET_
= +25°C. Currents are positive when entering the pin and
< V
OSC_FAIL
and
EE
, unless otherwise noted. Typical
MIN
2.92
18.6
13.5
21.5
300
100
300
1.8
3.8
9.0
1.5
5.5
2.4
30
16
50
31
45
TYP
2.98
1.75
1.62
12.5
14.5
325
1.9
9.3
6.5
23
33
48
5
4
MAX
3.04
26.5
15.5
24.5
350
400
2.1
4.2
9.6
2.0
7.5
0.9
16
20
75
35
51
UNITS
V/V
mA
mA
mA
kΩ
ms
kΩ
kΩ
µA
pF
µA
V
V
V
V
V
V
V