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High-Power, Quad, Monolithic, PSE Controllers
for Power over Ethernet
_______________________________________________________________________________________   3
ELECTRICAL CHARACTERISTICS (continued)
(V
AGND
= 32V to 60V, V
EE
= 0V, V
DD
to V
DGND
= +3.3V, all voltages are referenced to V
EE
, unless otherwise noted. Typical values are at
V
AGND
= +48V, V
DGND
= +48V, V
DD
= (V
DGND
+ 3.3V), T
A
= +25癈. Currents are positive when entering the pin and negative other-
wise.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
CURRENT LIMIT
IVEE = 00
202
212
220
IVEE = 01
192
202
212
IVEE = 10
186
190
200
Current-Limit Clamp Voltage
V
SU_LIM
M
axi m um V
S
E N
S E _
 al l ow ed 
d ur i ng cur r ent l i
m i t, V
OU T_
= 0V
(ICUT = 000) (Note 4)
IVEE = 11
170
180
190
mV
ICUT = 000
(Class 0/3)
177
186
196
ICUT = 110
(Class 1)
47
55
64
ICUT = 111
(Class 2)
86
94
101
ICUT = 001
265
280
295
ICUT = 010
310
327
345
ICUT = 011
355
374
395
ICUT = 100
398
419
440
Overcurrent Threshold After
Startup
V
FLT_LIM
Overcurrent V
SENSE_
 threshold
allowed for t d t
FAULT
 after
startup; V
OUT_
= 0V (IVEE = 00)
ICUT = 101
443
466
488
mV
ICUT = 000,
ICUT = 110,
ICUT = 111
32
Foldback Initial OUT_ Voltage
V
FLBK_ST
V
OUT_
 - V
EE
, above which the
current-limit trip voltage starts
folding back, IVEE = 00
ICUT =
001&101
13
V
Foldback Final OUT_ Voltage
V
FLBK_END
IVEE = 00, ICUT = 000, V
OUT_
 - V
EE
above
which the current-limit trip voltage reaches
V
TH_FB
50
V
Minimum Foldback
Current-Limit Threshold
V
TH_FB
V
OUT_
 = AGND = 60V, IVEE = 00, ICUT = 000
64
mV
SENSE_ Input Bias Current
V
SENSE_
 = V
EE
-5
+5
礎
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