max5952auaxt Maxim Integrated Products, Inc., max5952auaxt Datasheet - Page 5

• Manufacturer Part Number: max5952auaxt
• Description: Max5952 High-power, Quad, Pse Controller For Power-over-ethernet
• Manufacturer: Maxim Integrated Products, Inc.

ELECTRICAL CHARACTERISTICS (continued)
(AGND = 32V to 60V, V
AGND = +48V, DGND = +48V, V
(Note 2)
LOAD DISCONNECT
DC Load Disconnect
Threshold
AC Load Disconnect
Threshold (Note 6)
Oscillator Buffer Gain
OSC Fail Threshold (Note 7)
OSC Input Impedance
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
PARAMETER
_______________________________________________________________________________________
EE
= 0V, V
DD
DD
V
SYMBOL
= (DGND + 3.3V), T
I
OSC_FAIL
to DGND = +3.3V, all voltages are referenced to V
D_OPEN
V
R
V
V
I
I
A
Z
R
t
I
V
ACTH
CILIM
DCTH
DISC
DLIM
DBAD
V
DPH1
DPH2
I
OSC
OSC
DCP
DOK
CL
CL
High-Power, Quad, PSE Controller
Minimum V
(DC disconnect active), V
Current into DET_, for I < I
powers off, ACD_EN_ bit = H; V
V
Port does not power on if V
and ACD_EN_ bit is high
OSC input impedance when all the ACD_EN_
are active
Time from V
(Note 8)
AGND - V
AGND - V
phase
V
current through DET_
If AGND - V
phase a short circuit to AGND is detected
First point measurement current threshold for
open condition
(Note 9)
Detection rejects lower values
Detection rejects higher values
V
DET_ = AGND, during classification, measure
current through DET_
Classification current
thresholds between
classes
DET_
DET_
AGND
/ V
= AGND, during detection, measure
- V
A
OSC
= +25°C. Currents are positive when entering the pin and negative otherwise.)
DET_
DET_
DET_
SENSE
OUT
SENSE
, ACD_EN_ bit = H
during the first detection phase
during the second detection
during classification
< V
CONDITIONS
allowed before disconnect
for Power-Over-Ethernet
< V
DCP
DCTH
after the first detection
OUT_
ACTH
OSC
Class 0, Class 1
Class 1, Class 2
Class 2, Class 3
Class 3, Class 4
Class 4, Class 5
to gate shutdown
= 0V
OSC_IN
< V
the port
OSC_FAIL
EE
= 2.2V
, unless otherwise noted. Typical values are at
MIN
19.0
300
100
300
2.5
2.9
1.8
3.8
9.0
1.5
5.5
32
16
68
13
21
31
45
TYP
3.75
1.75
12.5
14.5
320
3.0
9.3
6.5
23
33
48
4
1
MAX
26.5
15.2
350
400
2.2
9.6
5.0
3.1
4.2
2.0
7.5
20
81
16
25
35
51
UNITS
mV
V/V
mA
mA
mA
ms
µA
kΩ
µA
kΩ
kΩ
V
V
V
V
V
5