TPS2350

SLUS574D – JULY 2003 – REVISED OCTOBER 2013

www.ti.com

ELECTRICAL CHARACTERISTICS (continued)

–VINA = –48 V, –VINB = 0 V, UV = 2.5 V, OV = 0.5 V, SENSE = 0 V, RAMP = 0 V, SOURCE = more negative of –VINA and

(1)(2)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Overload Comparator

SENSE current overload threshold

100

120

140

mV

Response time

SENSE – SOURCE = 200 mV

2

4

7

µs

Fault Timer

FLTTIM low-level output voltage, to

UV = –48 V

5

mV

–VINA

FLTTIM charging current, current limit

FLTTIM – SOURCE = 2 V

–54

–50

–41

µA

mode

FLTTIM fault threshold voltage to

3.75

4.00

4.25

SOURCE

V

Fault reset threshold to SOURCE

0.5

FLTTIM Discharge current, retry mode

FLTTIM – SOURCE = 2 V

0.38

0.75

µA

SENSE – SOURCE = 80 mV,

D

Output duty cycle during retry cycles

1%

1.5%

FLTTIM

− SOURCE = 2 V

FLTTIM discharge current, timer reset

FLTTIM

− SOURCE = 2 V,

1

mA

mode

SENSE = 2 V

Logic Outputs (FLT, PG)

FLT high-level output leakage current

UV = –48 V, FLT – SOURCE = 80 V

–10

10

µA

PG high-level output leakage current

UV = –45 V, PG – SOURCE = 80 V

–10

10

SENSE–SOURCE = 80 mV,

FLT ON resistance

FLTTIM–SOURCE = 5 V,

50

80

Ω

I(FLT) = 1 mA

PG ON resistance

50

80

Supply Selector

Threshold voltage, –VINA falling

–VINB = –48 V, –VINA falling

–48.45

–48.40

–48.35

V

Threshold voltage, –VINB falling

–VINA = –48 V, –VINB falling

–48.45

–48.40

–48.35

–VINA = 0 V, –VINB = –48 V,

GATA sink current

30

80

mA

GATA = –41 V

–VINA = –48 V, –VINB = –0 V,

GATA source current

–50

–20

µA

GATA = –41 V

–VINA = –48 V, –VINB = –0 V,

GATB sink current

30

80

mA

GATB = –41 V

–VINA = 0 V, –VINB = –48 V,

GATB source current

–50

–20

µA

GATB = –41 V

GATA low voltage to –VINA

VINA = 0 V, –VINB = –48 V

0.1

GATA high voltage to –VINA

–VINA = –48 V, –VINB = 0 V

11

14

17

V

GATB low voltage to –VINB

–VINA = –48 V, –VINB = 0 V

0.1

GATB high voltage to –VINB

–VINA = 0 V, –VINB = –48 V

11

14

17

4

Submit Documentation Feedback

Copyright © 2003–2013, Texas Instruments Incorporated

Product Folder Links: TPS2350