MAX5952 Datasheet, PDF (3/50 Pages) Maxim Integrated Products – High-Power, Quad, PSE Controller for Power-Over-Ethernet

High-Power, Quad, PSE Controller
for Power-Over-Ethernet
ELECTRICAL CHARACTERISTICS (continued)
(AGND = 32V to 60V, V_EE = 0V, V_DD to DGND = +3.3V, all voltages are referenced to V_EE, unless otherwise noted. Typical values are at
AGND = +48V, DGND = +48V, V_DD = (DGND + 3.3V), T_A = +25°C. Currents are positive when entering the pin and negative otherwise.)
(Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
CURRENT LIMIT
IVEE = 00
202
212
220
Maximum V_{SENSE_} allowed
IVEE = 01
192
202
212
Current-Limit Clamp Voltage
V_{SU_LIM} during current limit, V_{OUT_} = 0V
mV
(ICUT = 000) (Note 3)
IVEE = 10
186
190
200
IVEE = 11
170
180
190
ICUT = 000
(Class 0/3)
177
186
196
Overcurrent Threshold After
Startup
ICUT =110
(Class 1)
47
55
62
V_{FLT_LIM}
Overcurrent V_{SENSE_} threshold
allowed for t ≤ t_FAULT after
startup; V_{OUT_} = 0V,
ICUT = 111
(Class 2)
86
94
101
mV
(IVEE = 00)
ICUT = 001 265
280
295
ICUT = 010 310
327
345
ICUT = 011 355
374
395
ICUT = 100 398
419
440
ICUT =101
443
466
488
ICUT = 000,
V_{OUT_} - V_EE, above which the ^{ICUT = 110,}
28
Foldback Initial OUT_ Voltage V_{FLBK_ST} current-limit trip voltage starts ^{ICUT = 111}
V
folding back, IVEE = 00
ICUT =
001…101
10
Foldback Final OUT_ Voltage
IVEE = 00, ICUT = 000, V_OUT - V_EE above
V_{FLBK_END} which the current-limit trip voltage reaches
V_{TH_FB}
Minimum Foldback
Current-Limit Threshold
V_{TH_FB} V_{OUT_} = AGND = 60V, IVEE = 00, ICUT = 000
SENSE_ Input Bias Current
V_{SENSE_} = V_EE
-2
50
V
64
mV
+2
µA
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