Datasheet

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SLUS471D − JUNE 2002 − REVISED JANUARY 2008
3
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ELECTRICAL CHARACTERISTICS
V
I(−VIN)
= −48 V with respect to RTN, V
I(EN)
= 2.8 V, V
I(ISENS)
= 0, all outputs unloaded, T
A
= −40_C to 85_C
(unless otherwise noted)
(1)(2)
input supply
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
I
CC1
Supply current, RTN V
I(RTN)
= 48 V 700 1000 µA
I
CC2
Supply current, RTN V
I(RTN)
= 80 V 1000 1500 µA
V
UVLO_L
UVLO threshold, input voltage rising To GATE pull-up, referenced to RTN −36 −30 −25 V
V
HYS
UVLO hysteresis 1.8 2.3 3.0 V
enable input (EN)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
V
TH
Threshold voltage, input voltage rising To GATE pull-up 1.3 1.4 1.5 V
V
HYS_EN
EN hysteresis 30 60 90 mV
I
IH
High-level input current V
I(EN)
= 5 V −2 1 2 µA
linear current amplifier (LCA)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
V
OH
High-level output, GATE V
I(ISENS)
= 0 V 11 14 17 V
I
SINK
Output sink current V
I(ISENS)
= 80 mV, V
O(GATE)
= 5V, Fault mode 50 100 mA
I
I
Input current, ISENS 0 V < V
I(ISENS)
< 0.2 V −1 1 µA
V
REF_K
Reference clamp voltage V
O(IRAMP)
= open 33 40 46 mV
V
IO
Input offset voltage V
O(IRAMP)
= 2 V −7 6 mV
ramp generator
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
I
SRC1
IRAMP source current, slow turn-on rate V
O(IRAMP)
= 0.25 V −850 −600 −400 nA
I
SRC2
IRAMP source current, normal rate V
O(IRAMP)
= 1 V, 3 V −11 −10 −9 µA
V
OL
Low-level output voltage V
I(EN)
= 0 V 2 mV
A
V
Voltage gain, relative to ISENS V
O(IRAMP)
= 1 V, 3 V 9.5 10.0 10.5 mV/V
overload comparator
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
V
TH_OL
Current overload threshold, ISENS 80 100 120 mV
t
DLY
Glitch filter delay time V
I(ISENS)
= 200 mV 2 4 7 µs
fault timer
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
V
OL
Low-level output voltage V
I
(EN) = 0 V 5 mV
I
CHG
Charging current, current limit mode V
I(ISENS)
= 80 mV, V
O(FLTTIME)
= 2 V −55 −50 −45 µA
V
FLT
Fault threshold voltage 3.75 4.00 4.25 V
I
DSG
Discharge current, retry mode TPS2391 V
I(ISENS)
= 80 mV, V
O(FLTTIME)
= 2 V 0.38 0.75 µA
D Output duty cycle TPS2391 1 1.5 %
I
RST
Discharge current, timer reset mode V
O(FLTTIME)
= 2 V, V
I(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.