Rainbow-electronics MAX5965B Manuel d'utilisateur télécharger pdf (Page 3)

MAX5965A/MAX5965B

High-Power, Quad, Monolithic, PSE Controllers

for Power over Ethernet

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

AGND

= 32V to 60V, V

= 0V, V

to V

DGND

= +3.3V, all voltages are referenced to V

, unless otherwise noted. Typical values are at

AGND

= +48V, V

DGND

= +48V, V

= (V

DGND

+ 3.3V), T

= +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

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

FLT_LIM

Overcurrent V

SENSE_

threshold

allowed for t ≤ t

FAULT

after

startup; V

OUT_

= 0V,

(IVEE = 00)

ICUT =101 443 466 488

ICUT = 000,

ICUT = 110,

ICUT = 111

Foldback Initial OUT_ Voltage V

FLBK_ST

OUT_

- V

, above which the

current-limit trip voltage starts

folding back, IVEE = 00

ICUT =

001…101

Foldback Final OUT_ Voltage V

FLBK_END

IVEE = 00, ICUT = 000, V

OUT

- V

above

which the current-limit trip voltage reaches

TH_FB

50 V

Minimum Foldback

Current-Limit Threshold

TH_FB

OUT_

= AGND = 60V, IVEE = 00, ICUT = 000 64 mV

SENSE_ Input Bias Current V

SENSE_

= V

-5 +5 µA

1 2 3 4 5 6 7 8 ... 51 52

MAX5965A/MAX5965B 1

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Rainbow-electronics MAX5965B Manuel d'utilisateur Page 3

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