TPS2390

TPS2391

SLUS471C – JUNE 2002 – REVISED OCTOBER 29, 2002

3

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ELECTRICAL CHARACTERISTICS

input supply

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

ICC1

Supply current, RTN

VI(RTN) = 48 V

700

1000

µA

ICC2

Supply current, RTN

VI(RTN) = 80 V

1000

1500

µA

VUVLO_L

UVLO threshold, input voltage rising

To GATE pull-up, referenced to RTN

–36

–30

–25

V

VHYS

UVLO hysteresis

1.8

2.3

3.0

V

enable input (EN)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

VTH

Threshold voltage, input voltage rising

To GATE pull-up

1.3

1.4

1.5

V

VHYS_EN

EN hysteresis

30

60

90

mV

IIH

High-level input current

VI(EN) = 5 V

–2

1

2

µA

linear current amplifier (LCA)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

VOH

High-level output, GATE

VI(ISENS) = 0 V

11

14

17

V

ISINK

Output sink current

VI(ISENS) = 80 mV, VO(GATE) = 5V, Fault mode

50

100

mA

II

Input current, ISENS

0 V < VI(ISENS) < 0.2 V

–1

1

µA

VREF_K

Reference clamp voltage

VO(IRAMP) = open

33

40

46

mV

VIO

Input offset voltage

VO(IRAMP) = 2 V

–7

6

mV

ramp generator

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

ISRC1

IRAMP source current, slow turn-on rate

VO(IRAMP) = 0.25 V

–850

–600

–400

nA

ISRC2

IRAMP source current, normal rate

VO(IRAMP) = 1 V, 3 V

–11

–10

–9

µA

VOL

Low-level output voltage

VI(EN) = 0 V

2

mV

AV

Voltage gain, relative to ISENS

VO(IRAMP) = 1 V, 3 V

9.5

10.0

10.5

mV/V

overload comparator

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

VTH_OL

Current overload threshold, ISENS

80

100

120

mV

tDLY

Glitch filter delay time

VI(ISENS) = 200 mV

2

4

7

µs

fault timer

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

VOL

Low-level output voltage

VI(EN) = 0 V

5

mV

ICHG

Charging current, current limit mode

VI(ISENS) = 80 mV, VO(FLTTIME) = 2 V

–55

–50

–45

µA

VFLT

Fault threshold voltage

3.75

4.00

4.25

V

IDSG

Discharge current, retry mode

TPS2391

VI(ISENS) = 80 mV, VO(FLTTIME) = 2 V

0.38

0.75

µA

D

Output duty cycle

TPS2391

1

1.5

%

IRST

Discharge current, timer reset mode

VO(FLTTIME) = 2 V,VI(ISENS) = 0 V

1

mA

NOTES 1: All voltages are with respect to the –VIN terminal unless otherwise stated.

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