MAX5971B Maxim Integrated Products, MAX5971B Datasheet - Page 3

• Manufacturer Part Number: MAX5971B
• Description: PSE Controller
• Manufacturer: Maxim Integrated Products

ELECTRICAL CHARACTERISTICS (continued)
(V
V
OVERCURRENT
Overcurrent Threshold
INTERNAL POWER
DMOS On-Resistance
Power-Off OUT Leakage Current
SUPPLY MONITORS
V
V
Hysteresis
V
V
Hysteresis
V
Thermal Shutdown Threshold
Thermal Shutdown Hysteresis
OUTPUT MONITOR
OUT Input Current
Idle Pullup Current at OUT
Short to V
Short to V
Hysteresis
AGND
AGND
EE
EE
EE
EE
EE
Undervoltage Lockout
Undervoltage Lockout
Overvoltage Lockout
Overvoltage Lockout
Undervoltage
- V
- V
PARAMETER
EE
EE
EE
EE
= +54V, T
Detection Threshold
Detection Threshold
= 32V to 60V, T
_______________________________________________________________________________________
A
= +25NC. Currents are positive when entering the pin and negative otherwise.) (Note 2)
A
= -40NC to +85NC, all voltages are referenced to V
V
I
V
SYMBOL
OUT_LEAK
V
EE_UVLOH
V
V
DCN
DCN
EE_UVLO
T
EE_OVH
Single-Port, 40W, IEEE 802.3af/at,
I
T
I
EE_OV
EE_UV
BOUT
SHDH
I
CUT
SHD
DIS
HY
TH
Overcurrent
threshold
allowed for t P
t
= 0V (Note 3)
Measured from
OUT to V
100mA
V
V
Port is shutdown if: V
UVLO
V
V
V
Port is shut down and device resets if the
junction temperature exceeds this limit,
temperature increasing
Temperature decreasing
V
OUTP discharge current, detection and
classification off, port shutdown,
V
V
during detection
FAULT
EN
AGND
AGND
EE_UV
EE_UV
OUT
OUTP
OUT
= V
- V
= V
- V
, V
= V
, V
- V
- V
EE
event bit sets if: V
EE
EE_UVLOH
EE,
OUT
AGND
EE
EE
EE
, V
AGND
, I
V
OUT
, V
increasing
OUT
> V
OUT
CONDITIONS
, probing phases
AGND
Class 0, 1, 2, 3 or ICUT
= 000
Class 4 or ICUT = 001
Class 5 if ILIM1 = V
ILIM2 = unconnected or
ICUT = 101
Class 5 if ILIM1 =
unconnected, ILIM2 = V
or ICUT = 110
Class 5 if ILIM1 = V
ILIM2 = V
EE_OV
- 2.8V
=
PSE Controller with I
= V
decreasing, enabled
AGND
AGND
increasing
T
T
, V
A
A
AGND
AGND
= +25NC
= +85NC
EE
- V
or ICUT = 111
EE
increasing
- V
< V
EE
EE
, unless otherwise noted. Typical values are at
EE
EE
EE_
<
,
,
EE
MIN
351
602
710
752
794
200
1.5
TYP
28.5
62.5
370
634
748
792
836
150
220
0.5
0.6
2.0
40
20
3
1
MAX
389
666
785
832
878
265
0.9
1.3
2.5
10
6
UNITS
mA
2
mV
FA
FA
FA
NC
NC
I
V
V
V
V
V
V
C
3