參數(shù)資料
型號： MAX5984DETI+T
廠商： Maxim Integrated Products
文件頁數(shù)： 16/22頁
文件大?。?/td> 0K
描述： IC CTRLR PD IEEE W/MOSFT 28TQFN
標(biāo)準(zhǔn)包裝： 2,500
系列： *
_______________________________________________________________________________________ 3
MAX5984
Single-Port, 40W, IEEE 802.3af/802.3at PSE
Controller with Integrated MOSFET
ELECTRICAL CHARACTERISTICS (continued)
(VAGND - VEE = 32V to 60V, TA = -40NC to +85NC, all voltages are referenced to VEE, unless otherwise noted. Typical values are at
VAGND - VEE = 54V, TA = +25NC. Currents are positive when entering the pin and negative otherwise.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
UNITS
OVERCURRENT
Overcurrent Threshold
ICUT
Overcurrent
threshold
allowed for
t P tFAULT,
VOUT = 0V
(Note 3)
Class 0, 1, 2, 3
351
370
389
mA
Class 4
602
634
666
Class 5 if ILIM1 = VEE,
ILIM2 = unconnected
710
748
785
Class 5 if ILIM1 =
unconnected, ILIM2 = VEE
752
792
832
Class 5 if ILIM1 = VEE,
ILIM2 = VEE
794
836
878
INTERNAL POWER
DMOS On-Resistance
RDS(ON)
Measured
from OUT to
VEE, IOUT =
100mA
TA = +25NC
0.5
0.9
I
TA = +85NC
0.6
1.3
Power-Off OUT Leakage Current IOUT_LEAK VEN = VEE, VOUT = VAGND
10
F
A
SUPPLY MONITORS
VEE Undervoltage Lockout
VEE_UVLO
VAGND - VEE, VAGND increasing
28.5
V
VEE Undervoltage Lockout
Hysteresis
VEE_UVLOH
Port is shutdown if: VAGND - VEE < VEE_
UVLO - VEE_UVLOH
3
V
VEE Overvoltage Lockout
VEE_OV
VAGND - VEE > VEE_OV, VAGND increasing
62.5
V
VEE Overvoltage Lockout
Hysteresis
VEE_OVH
1
V
Thermal Shutdown Threshold
TSHD
Port is shutdown and device resets if the
junction temperature exceeds this limit,
temperature increasing
+150
N
C
Thermal Shutdown Hysteresis
TSHDH
Temperature decreasing
20
N
C
OUTPUT MONITOR
OUT Input Current
IBOUT
VOUT = VAGND, probing phases
6
F
A
Idle Pullup Current at OUT
IDIS
OUTP discharge current, detection and
classification off, port shutdown,
VOUTP = VAGND - 2.8V
200
265
F
A
Short to VEE Detection
Threshold
DCNTH
VOUT - VEE, VOUT decreasing, enabled
during detection
1.5
2.0
2.5
V
Short to VEE Detection
Threshold Hysteresis
DCNHY
220
mV
LOAD DISCONNECT
DC Load-Disconnect Threshold
IDCTH
Minimum load current allowed before
disconnect (DC disconnect active),
VOUT = 0V
5
7.5
10
mA
AC Load-Disconnect Threshold
IACTH
Current into DET, for IDET < IACTH the
port powers off (AC disconnect active)
115
130
145
F
A
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