TPS2376D datasheet(3/25 Pages) TI

Part #	TPS2376D

Description	IEEE 802.3af PoE POWERED DEVICE CONTROLLERS

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Manufacturer	TI [Texas Instruments]

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RECOMMENDED OPERATING CONDITIONS

ELECTRICAL CHARACTERISTICS

data sheet

TPS2375

TPS2376

TPS2377

www.ti.com............................................................................................................................................................ SLVS525B – APRIL 2004 – REVISED APRIL 2008

MIN

MAX

UNIT

VDD, PG, RTN

0

57

V

Input voltage range

UVLO

0

5

V

Operating current range (sinking)

RTN

0

350

mA

Classification resistor(1)

CLASS

255

4420

Ω

R(ILIM) Inrush limit program resistor

(1)

62.5

500

k

Ω

Sinking current

PG

0

2

mA

TJ

Operating junction temperature

-40

125

°C

TA

Operating free–air temperature

-40

85

°C

(1)

Voltage should not be eternally applied to CLASS and ILIM.

V(VDD) = 48 V, R(DET) = 24.9 kΩ, R(CLASS) = 255 Ω, R(ILIM) = 178 kΩ, and –40°C ≤ TJ ≤ 125°C, unless otherwise noted. Positive

currents are into pins. V(UVLO) = 0 V for classification and V(UVLO) = 5 V otherwise for the TPS2376. Typical values are at 25°C.

All voltages are with respect to VSS unless otherwise noted.

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

DETECTION

DET open, V(VDD) = V(RTN) = 1.9 V, measure

Offset current

0.3

3

µA

I(VDD) + I(RTN)

DET open, V(VDD) = V(RTN) = 10.1 V, measure

Sleep current

4

12

µA

I(VDD) + I(RTN)

DET leakage current

V(DET) = V(VDD) = 57 V, measure I(DET)

0.1

5

µA

V(RTN) = V(VDD),

V(VDD) = 1.4 V

53.7

56

58.3

µA

R(DET) = 24.9 kΩ,

Detection current

measure I(VDD) + I(RTN) +

V(VDD) = 10.1 V

395

410

417

µA

I(DET)

CLASSIFICATION

R(CLASS) = 4420 Ω, 13 ≤ V(VDD) ≤ 21 V

2.2

2.4

2.8

R(CLASS) = 953 Ω, 13 ≤ V(VDD) ≤ 21 V

10.3

10.6

11.3

I(CLASS)

Classification current(1)

R(CLASS) = 549 Ω, 13 ≤ V(VDD) ≤ 21 V

17.7

18.3

19.5

mA

R(CLASS) = 357 Ω, 13 ≤ V(VDD) ≤ 21 V

27.1

28.0

29.5

R(CLASS) = 255 Ω, 13 ≤ V(VDD) ≤ 21 V

38.0

39.4

41.2

V(CL_ON)

Classification lower threshold

Regulator turns on, V(VDD) rising

10.2

11.3

13.0

V

V(CU_OFF)

Regulator turns off, V(VDD) rising

21

21.9

23

V

Classification upper threshold

V(CU_H)

Hysteresis

0.5

0.78

1

V

Leakage current

V(CLASS) = 0 V, V(VDD) = 57 V

1

µA

PASS DEVICE

rDS(on)

On resistance

I(RTN) = 300 mA

0.58

1.0

Ω

V(VDD) = V(RTN) = 30 V,

15

Leakage current

µA

V(UVLO) = 0 V (TPS2376)

Current limit

V(RTN) = 1 V

405

461

515

mA

I(LIM)

Inrush limit

V(RTN) = 2 V, R(ILIM) = 178 kΩ

100

130

180

mA

V(RTN) falling, R(ILIM) = 178 kΩ, inrush

85%

91%

100%

Inrush current termination (2)

state

→normal operation

R(ILIM) = 69.8 kΩ, V(RTN-VSS) = 5 V,

15

25

Current rise time into inrush

I(RTN) = 30 mA→300 mA, V(VDD) increasing

µs

past upper UVLO

Apply load

∞Ω→20 Ω, time measured to

2

2.5

Current limit response time

µs

I(RTN) = 45 mA

Leakage current, ILIM

V(VDD) = 15 V, V(UVLO) = 0 V

1

µA

(1)

Classification is tested with exact resistor values. A 1% tolerance classification resistor assures compliance with IEEE 802.3af limits.

(2)

This parameter specifies the RTN current value, as a percentage of the steady state inrush current, below which it must fall to make PG

assert (open-drain).

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Product Folder Link(s): TPS2375 TPS2376 TPS2377

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