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TPS2491DGS Datasheet(PDF) 3 Page - Texas Instruments

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No. de pieza TPS2491DGS
Descripción Electrónicos  POSITIVE HIGH-VOLTAGE POWER-LIMITING HOTSWAP CONTROLLER
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Fabricante Electrónico  TI [Texas Instruments]
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TPS2491DGS Datasheet(HTML) 3 Page - Texas Instruments

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TPS2490
TPS2491
SLVS503 – NOVEMBER 2003
ELECTRICAL CHARACTERISTICS
unless otherwise noted, minimum and maximum limits apply across the recommended operating junction temperature and
voltage range, V
TIMER = 0 V, and all outputs unloaded; typical specifications are at TJ = 25°C, VVCC = 48 V, VTIMER = 0 V, and
all outputs unloaded; positive currents are into pins.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
SUPPLY CURRENT (VCC)
Enabled
VEN = Hi, VSENSE = VOUT = VVCC
450
1000
µA
Disabled
VEN = Lo, VSENSE = VVCC = VOUT = 0
90
250
µA
CURRENT SENSE INPUT (SENSE)
ISENSE
Input bias current
VSENSE = VVCC, VOUT = VVCC
7.5
20
µA
REFERENCE VOLTAGE OUTPUT (VREF)
VREF
Reference voltage
0 < IVREF < 1 mA
3.9
4
4.1
V
POWER LIMITING INPUT (PROG)
Input bias current, device enabled, sourcing or
IPROG
0 < VPROG < 4 V, VEN = 48 V
5
µA
sinking
RPROG
Pulldown resistance, device disabled
IPROG = 200 µA, VEN = 0 V
375
600
POWER LIMITING AND CURRENT LIMITING (SENSE)
Current sense threshold V(VCC-SENSE) with
VPROG = 2.4 V, VOUT = 0 V or
VCL
17
25
33
mV
power limiting trip
VPROG = 0.9 V, VOUT = 30 V, VVCC = 48 V
VSENSE
Current sense threshold V(VCC-sense) without
VPROG = 4 V, VSENSE = VOUT
45
50
55
mV
power limiting trip
VPROG = 4 V, VOUT = VSENSE,
tF_TRIP
Large overload response time to GATE low(1)
V(VCC-SENSE): 0 → 200 mV,
1.2
µS
C(GATE-OUT) = 2 nF, V(GATE-OUT) = 1 V
TIMER OPERATION (TIMER)
VTIMER = 0 V
15.0
25.0
34.0
µA
Charge current (sourcing)
VTIMER = 0 V, TJ = 25°C
20.0
25.0
30.0
µA
VTIMER = 5 V
1.50
2.5
3.70
µA
Discharge current (sinking)
VTIMER = 5 V, TJ = 25°C
2.10
2.5
3.10
µA
TIMER upper threshold voltage
3.9
4
4.1
V
TIMER lower reset threshold voltage
TPS2491 only
0.96
1.0
1.04
V
DRETRY
Fault retry duty cycle
TPS2491 only
0.5% 0.75%
1.0%
GATE DRIVE OUTPUT (GATE)
VSENSE = VVCC, V(GATE-OUT) = 7 V,
IGATE
GATE sourcing current
15
22
35
µA
VEN = Hi
VEN = Lo, VGATE = VVCC
1.8
2.4
2.8
mA
GATE sinking current
VEN = Hi, VGATE = VVCC,
75
125
250
mA
V(VCC-SENSE)≥ 200 mV
GATE output voltage, V(GATE-OUT)
12
16
V
Propagation delay: EN going true to GATE
VEN = 0 → 2.5 V, 50% of VEN to 50% of
tD_ON
25
40
µS
output high(1)
VGATE, VOUT = VVCC, R(GATE-OUT)= 1 MΩ
VEN = 2.5 V → 0, 50% of VEN to 50% of
Propagation delay: EN going false (0 V) to
tD_OFF
VGATE, VOUT = VVCC,
0.5
1
µS
GATE output low(1)
R(GATE-OUT)= 1 MΩ, tFALL < 0.1 µS
VTIMER: 0 → 5 V, tRISE < 0.1 µS, 50% of
Propagation delay: TIMER expires to GATE
VTIMER to 50% of VGATE, VOUT = VVCC,
0.8
1
µS
output low(1)
R(GATE-OUT) = 1 MΩ,
POWER GOOD OUTPUT (PG)
IPG = 2 mA
0.1
0.25
V
VPG_L
Low voltage (sinking)
IPG = 4 mA
0.25
0.5
V
PG threshold voltage, VOUT rising, PG goes
VPGTL
VSENSE = VVCC, measure V(VCC-OUT)
0.8
1.25
1.7
V
open drain
(1)
Not tested in production.
3


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