TPS2375D datasheet(4/21 Pages) TI

Part #	TPS2375D

Description	IEEE 802.3af PoE POWERED DEVICE CONTROLLERS

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TPS2375

TPS2376

TPS2377

SLVS525A – APRIL 2004 – REVISED SEPTEMBER 2004

ELECTRICAL CHARACTERISTICS (continued)

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

PG

Latchoff voltage threshold rising (4)

V(RTN) rising

9.5

10.0

10.5

V

PG deglitch(5)

Delay rising and falling PG

75

150

225

µs

I(PG) = 2 mA, V(RTN) = 34 V,

0.12

0.4

V

V(VDD) = 38 V, V(RTN) falling

Output low voltage

I(PG) = 2 mA, V(RTN) = 0 V, V(VDD) = 25 V, for

0.12

0.4

V

TPS2376 V(UVLO) = 0 V

Leakage current

V(PG) = 57 V, V(RTN) = 0 V

0.1

1

µA

UVLO

V(UVLO_R)

V(VDD) rising

38.4

39.3

40.4

V(UVLO_F)

TPS2375 Voltage at VDD

V(VDD) falling

29.6

30.5

31.5

V

Hysteresis(5)

8.3

8.8

9.1

V(VDD) rising

2.43

2.49

2.57

TPS2376 Voltage at UVLO

V(VDD) falling

1.87

1.93

1.98

V

Hysteresis(5)

0.53

0.56

0.58

V(VDD) rising

34.1

35.1

36.0

TPS2377 Voltage at VDD

V(VDD) falling

29.7

30.5

31.4

V

Hysteresis(5)

4.3

4.5

4.8

TPS2376 Input leakage, UVLO

V(UVLO) = 0 V to 5 V

-1

1

µA

THERMAL SHUTDOWN

Shutdown temperature(5)

Temperature rising

135

°C

Hysteresis(5)

20

°C

BIAS CURRENT

Operating current

I(VDD)

240

450

µA

(4)

Start with V(RTN) = 0 V, then increase V(RTN) until I(RTN) ceases.

(5)

Not tested inproduction.

4

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