TPS23750PWPR datasheet(5/41 Pages) TI1

Part #	TPS23750PWPR

Description	INTEGRATED 100-V IEEE 802.3af PD AND DC/DC CONTROLLER

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PoE SECTION

TPS23750

TPS23770

SLVS590B – JULY 2005 – REVISED FEBRUARY 2008

DC/DC CONTROLLER SECTION (continued)

RTN = VSS for this section only.

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

VSENP-SEN = 1.5 V, TMR = RSN, IFB = 0 µA and 10 µA,

Translator output resistance

11.25

15

18.75

k

Ω

RFB = ΔVFB / Δ IFB

SEN sinking current

VSENP-SEN = 1.50 V, VTMR = RSN

1

µA

SENP sinking current

VSENP-SEN = 1.50 V, VTMR = RSN

17

22.5

28

µA

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

DETECTION (DET)

Offset current

DET open, VDD = VRTN = 1.9 V, Measure IVDD + IRTN + ISENP

0.45

4

µA

Sleep current

DET open, VDD = VRTN = 10.1 V, Measure IVDD + IRTN + ISENP

5.6

12

µA

DET leakage current

VDET = VDD = 57 V, Measure IDET

0.3

5

µA

VDD = 1.4 V

51.5

55

58.7

RTN = VDD, Measure IVDD + IRTN +

Detection current

µA

IDET + ISENP

VDD = 10.1 V

395

411

417

CLASSIFICATION (CLASS)

RTN = VDD, Measure IVDD + IRTN + IDET + ISENP

RCLASS = 4420 Ω, 13 ≤ VDD ≤ 21 V

2.2

2.5

2.8

RCLASS = 953 Ω, 13 ≤ VDD ≤ 21 V

10.3

10.6

11.3

ICLASS

Classification current

mA

RCLASS = 549 Ω, 13 ≤ VDD ≤ 21 V

17.7

18.3

19.5

RCLASS = 357 Ω, 13 ≤ VDD ≤ 21 V

27.1

28.0

29.5

RCLASS = 255 Ω, 13 ≤ VDD ≤ 21 V

38.0

39.4

41.2

VCL_ON

Regulator turns on, VDD rising

10.2

11.3

13.0

Classification lower threshold

V

VCL_H

Hysteresis

1

1.75

3

VCU_OFF

Regulator turns off, VDD rising

21

21.9

23

Classification upper threshold

V

VCU_H

Hysteresis

0.5

0.83

1

PASS DEVICE (RTN)

On resistance

IRTN = 300 mA

0.60

1

Ω

Current limit

VRTN = 1 V

405

450

515

mA

IINR

Inrush limit

VRTN = 1.6 V

100

140

180

mA

CONTROL

Inrush current state termination

IRTN falling from IINR, IRTN/IINR

0.85

1.00

UVLO

VUVLO_R

VDD rising, monitor IRTN

38.4

39.3

40.4

VUVLO_F

Standard UVLO threshold

VDD falling, monitor IRTN

29.6

30.5

31.5

V

Hysteresis

8.3

8.8

9.1

VUVLO_R

VDD rising, monitor IRTN

34.1

35.1

36.0

VUVLO_F

Legacy UVLO threshold

VDD falling, monitor IRTN

29.7

30.5

31.4

V

Hysteresis

4.3

4.5

4.8

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