Rainbow Electronics MAX5965B - Manual (Page 3)

MAX5965A/MAX5965B
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°C. 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 ≤ 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 µA