Datasheet
TPS2492
TPS2493
www.ti.com
SLUSA65C –JULY 2010–REVISED JANUARY 2013
ELECTRICAL CHARACTERISTICS
9 V ≤ V
VCC
≤ 80 V, -40°C ≤ T
J
≤ 125°C, V
TIMER
= 0 V and all outputs unloaded. Typical specification are at T
J
= 25°C, V
VCC
=
48 V (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Supply Current (VCC)
I
VCC
Enabled V
UVEN
= Hi, V
SENSE
= V
OUT
= V
VCC
665 1000
µA
I
VCC
Disabled V
UVEN
= Lo, V
SENSE
= V
VCC
, V
OUT
= 0 120 250
Input Supply UVLO (VCC)
V
VCC
turn on Rising 8.4 8.8 V
Hysteresis 50 100 150 mV
Current Sense Input (SENSE)
I
SENSE
Input bias current V
SENSE
= V
OUT
= V
VCC
7.5 20 µA
Reference Voltage Output (VREF)
V
REF
Reference voltage 0 ≤ I
VREF
≤ 1 mA 3.9 4 4.1 V
Power Limiting Input (PROG)
Input bias current; device
I
PROG
0.4 ≤ V
PROG
≤ 4 V V
UVEN
= 48 V 5 µA
enabled; sourcing or sinking
Pull down resistance; device
R
PROG
I
PROG
= 200 µA; V
UVEN
= 0 V 375 600 Ω
disabled
Power Limiting and Current Limiting (SENSE)
V
PROG
= 2.4 V; V
OUT
= 0 V; V
VCC
= 48 V 17 25 33
Current limit threshold V
(VCC-
SENSE)
with power limiting trip
V
PROG
= 0.9 V; V
OUT
= 30 V; V
VCC
= 48 V 17 25 33
mV
Current limit threshold V
(VCC-
V
PROG
= 4 V; V
SENSE
= V
OUT
45 50 55
SENSE)
without power limiting trip
V
PROG
= 4 V; V
OUT
= V
SENSE
; V
(VCC-SENSE)
: 0
Large overload response time to
t
F_TRIP
rising to 200 mV; C
(GATE-OUT)
= 2 nF; V
(GATE-
1.2 µs
GATE low
OUT)
= 1 V
TIMER Operation (TIMER)
V
TIMER
= 0 V 17 27 36
I
SOURCE
TIMER source current
V
TIMER
= 0 V; T
J
= 25°C 22 27 32
µA
V
TIMER
= 5 V 1.5 2.7 3.7
I
SINK
TIMER sink current
V
TIMER
= 5 V; T
J
= 25°C 2.1 2.7 3.1
TIMER upper threshold 3.9 4 0 4.1
V
TIMER
V
TIMER lower reset threshold TPS2492 only 0.96 1.00 1.04
D
RETRY
Fault retry duty cycle TPS2493 only 0.5 0.75 1 %
Fault Indicator Output (FLT)
I
FLT
= 2 mA 0.1 0.25
Low voltage (sinking) V
I
FLT
= 4 mA 0.25 0.5
I
LEAKAGE
Leakage current FLT high impedance 10 µA
Under-Voltage and Enable Input (UVEN)
V
UVEN_H
UVEN rising 1.31 1.35 1.39 V
Threshold voltage
Hysteresis 80 100 120 mV
Leakage current V
UVEN
= 48 V 1 µA
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