Datasheet

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
SLUS536C − AUGUST 2002 − REVISED AUGUST 2004
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4
ELECTRICAL CHARACTERISTICS
V
I(−VIN)
= −48 V with respect to RTN, V
I(EN)
= 2.8 V, V
I(INSA)
= 0 V, V
I(INSB)
= 0 V, V
I(UVLO)
= 2.5 V, V
I(OVLO)
= 0 V, V
I(ISENS)
= 0 V, all outputs
unloaded, T
A
= −40°C to 85°C (unless otherwise noted)
(1)(2)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
INPUT SUPPLY
I
CC1
Supply current, RTN
V
I(RTN)
= 48 V 1050 1500
A
I
CC2
Supply current, RTN
V
I(RTN)
= 80 V 1350 1700
µ
A
V
UVLO_L
Internal UVLO threshold, V
IN
rising To GATE pull-up −19 −16 −13 V
V
HYS
Internal UVLO hysteresis 200 mV
ENABLE INPUT (EN)
V
TH
Threshold voltage, V
IN
rising To GATE pull-up 1.3 1.4 1.5 V
I
SRC_EN
EN pin switched pull-up current −12 −10 −8 µA
UNDERVOLTAGE/OVERVOLTAGE COMPARATORS
V
TH_UV
Threshold voltage, V
IN
rising, UVLO To GATE pull-up 1.36 1.40 1.44 V
I
SRC_UV
UVLO pin switched pull-up current V
I(UVLO)
= 2.5 V −11.7 −10.0 −8.3 µA
I
IL
UVLO low-level input current V
I(UVLO)
= 1 V −1 1 µA
V
TH_OV
Threshold voltage, V
IN
rising, OVLO To GATE pull-up 1.36 1.40 1.44 V
I
SRC_OV
OLVO pin switched pull-up current V
I(OVLO)
= 2.5 V −11.7 −10.0 −8.3 µA
I
IL
OVLO low-level input current V
I(OVLO)
= 1 V −1 1 µA
INSERTION DETECTION
V
TH
Threshold voltage, V
IN
rising, INSA, INSB To GATE pull-down 1.0 1.4 1.8 V
I
SRC_INSx
INSA, INSB pin pull-up current V
I(INSA)
= 0 V, V
I(INSB)
= 0 V −14 −11 −8 µA
t
D_INS
Insertion delay time, V
IN
falling, INSA, INSB To GATE pull-up 1.5 2.5 4.1 ms
LINEAR CURRENT AMPLIFIER (LCA)
V
OH
High-level output voltage, GATE V
I(ISENS)
= 0 V, I
O(GATE)
= −10 µA 11 14 17 V
I
SINK
Output sink current, linear mode
V
I(ISENS)
= 80 mV, V
O(GATE)
= 5 V
V
O(FLTTIME)
= 2 V
5 10
mA
I
FAULT
Output sink current, fault shutdown
V
I(ISENS)
= 80 mV, V
O(GATE)
= 5 V
V
O(FLTTIME)
> 4 V
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 47
mV
V
IO
Input offset voltage V
O(IRAMP)
= 2 V −7 7
mV
RAMP GENERATOR
I
SRC1
IRAMP source current, reduced rate turn-on V
O(IRAMP)
= 0.25 V −850 −600 −400 nA
I
SRC2
IRAMP source current, normal rate
V
O(IRAMP)
= 1 V −11 −10 −9
A
I
SRC2
IRAMP source current, normal rate
V
O(IRAMP)
= 3 V −11 −10 −9
µ
A
V
OL
Low-level output voltage, IRAMP V
I(EN)
= 0 V 2 mV
A
V
Voltage gain, relative to ISENS 9.5 10.0 10.5 mV/V
OVERLOAD COMPARATOR
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
(1) All voltages are with respect to the −VIN terminal, unless otherwise stated.
(2) Currents are positive into and negative out of the specified terminals.