MAX5952 datasheet(3/50 Pages) MAXIM

Part #	MAX5952

Description	High-Power, Quad, PSE Controller for Power-Over-Ethernet

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Manufacturer	MAXIM [Maxim Integrated Products]

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3 / 50 page

High-Power, Quad, PSE Controller

for Power-Over-Ethernet

_______________________________________________________________________________________

3

ELECTRICAL CHARACTERISTICS (continued)

(AGND = 32V to 60V, VEE = 0V, VDD to DGND = +3.3V, all voltages are referenced to VEE, unless otherwise noted. Typical values are at

AGND = +48V, DGND = +48V, VDD = (DGND + 3.3V), TA = +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

IVEE = 01

192

202

212

IVEE = 10

186

190

200

Current-Limit Clamp Voltage

VSU_LIM

Maximum VSENSE_ allowed

during current limit, VOUT_ = 0V

(ICUT = 000) (Note 3)

IVEE = 11

170

180

190

mV

ICUT = 000

(Class 0/3)

177

186

196

ICUT =110

(Class 1)

47

55

62

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

VFLT_LIM

Overcurrent VSENSE_ threshold

allowed for t

≤ tFAULT after

startup; VOUT_ = 0V,

(IVEE = 00)

ICUT =101

443

466

488

mV

ICUT = 000,

ICUT = 110,

ICUT = 111

28

Foldback Initial OUT_ Voltage

VFLBK_ST

VOUT_ - VEE, above which the

current-limit trip voltage starts

folding back, IVEE = 00

ICUT =

001…101

10

V

Foldback Final OUT_ Voltage

VFLBK_END

IVEE = 00, ICUT = 000, VOUT - VEE above

which the current-limit trip voltage reaches

VTH_FB

50

V

Minimum Foldback

Current-Limit Threshold

VTH_FB

VOUT_ = AGND = 60V, IVEE = 00, ICUT = 000

64

mV

SENSE_ Input Bias Current

VSENSE_ = VEE

-2

+2

µA

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