TPS2350

SLUS574A − JULY 2003 − REVISED SEPTEMBER 2003

3

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ELECTRICAL CHARACTERISTICS

−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

Input Supply

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

ICC1A

Supply current

−VINA = −48 V, −VINB = 0 V

1000

1500

ICC2A

Supply current

−VINA = −80 V, −VINB = 0 V

2000

A

ICC1B

Supply current

−VINB = −48 V, −VINA = 0 V

1000

1500

µA

ICC2B

Supply current

−VINB = −80 V, −VINA = 0 V

2000

VUVLO_I Internal UVLO threshold voltage

To GAT pull up

−11.8

−10

−8.0

V

VHYST

Internal UVLO hysteresis voltage

50

240

500

mV

Overvoltage and Undervoltage Inputs (OV and UV)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

To GAT pull up, 25

_C

1.391

1.400

1.409

VTHUV

UV threshold voltage, UV rising, to –VINA

To GAT pull up, 0 to 70

_C

1.387

1.400

1.413

V

VTHUV

UV threshold voltage, UV rising, to –VINA

To GAT pull up, −40 to 85

_C

1.384

1.400

1.419

V

IHYSUV

UV hysteresis

UV = −45.5 V

−11

−10

−9

A

IILUV

UV low−level input current

UV = −47 V

−1

1

µA

VTHOV

OV threshold voltage, OV rising, to −VINA

To GAT pull up

1.376

1.400

1.426

V

IHYSOV

OV hysteresis

OV = −45.5 V

−11.1

−10

−8.6

A

IILOV

OV low−level input current

OV = −47 V

−1

1

µA

Linear Curent Amplifier (LCA)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

VOH

High level output, GAT−SOURCE

SENSE = SOURCE

11

14

17

V

ISINK_f GAT sink current in fault

SENSE – SOURCE = 80 mV, GAT = −43

V, FLTTIME = 5 V

30

75

mA

ISINK_l GAT sink current in linear mode

SENSE – SOURCE = 80 mV, GAT =

−43 V, FLTTIME = 2 V

5

10

mA

IIN

SENSE input current

0.0 V < SENSE – SOURCE < 0.2 V

−1

1

µA

VREF_K

Reference clamp voltage, SENSE −

SOURCE

RAMP – SOURCE = 6 V

34

42

50

mV

VIO

Input offset voltage, SENSE − SOURCE

RAMP – SOURCE = 0 V

−7

9

mV

Ramp Generator

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

ISRC1

RAMP source current, slow turn-on rate

RAMP − SOURCE = 0.25 V

−800

−550

−300

nA

ISRC2

RAMP source current, normal rate

RAMP − SOURCE = 1 V and 3 V

−11.3

−10

−8.5

µA

VOL

Low-level output voltage

UV = SOURCE

5

mV

AV

Voltage gain, relative to SENSE

0 V < RAMP − SOURCE < 5 V

9.5

10

10.7

mV/V

† All voltages are with respect to RTN unless otherwise stated.

‡ Currents are positive into and negative out of the specified terminal.