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参数资料
| 型号： | TPS2491DGSG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 电源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO10 |
| 封装： | GREEN, PLASTIC, MSOP-10 |
| 文件页数： | 18/24页 |
| 文件大小： | 534K |
| 代理商： | TPS2491DGSG4 |
SLVS503C
– NOVEMBER 2003 – REVISED SEPTEMBER 2011
ELECTRICAL CHARACTERISTICS
unless otherwise noted, minimum and maximum limits apply across the recommended operating junction temperature and
voltage range, VTIMER = 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
A
Disabled
VEN = Lo, VSENSE = VVCC = VOUT = 0
90
250
A
CURRENT SENSE INPUT (SENSE)
ISENSE
Input bias current
VSENSE = VVCC, VOUT = VVCC
7.5
20
A
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
A
sinking
RPROG
Pulldown resistance, device disabled
IPROG = 200 A, 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
V(VCC-SENSE): 0 → 200 mV,
1.2
s
C(GATE-OUT) = 2 nF, V(GATE-OUT) = 1 V
TIMER OPERATION (TIMER)
VTIMER = 0 V
15.0
25.0
34.0
A
Charge current (sourcing)
VTIMER = 0 V, TJ = 25°C
20.0
25.0
30.0
A
VTIMER = 5 V
1.50
2.5
3.70
A
Discharge current (sinking)
VTIMER = 5 V, TJ = 25°C
2.10
2.5
3.10
A
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
A
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
s
output high
VGATE, VOUT = VVCC, R(GATE-OUT)= 1 M
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
s
GATE output low
R(GATE-OUT)= 1 M, tFALL < 0.1 s
VTIMER: 0 → 5 V, tRISE < 0.1 s, 50% of
Propagation delay: TIMER expires to GATE
VTIMER to 50% of VGATE, VOUT = VVCC,
0.8
1
s
output low
R(GATE-OUT) = 1 M,
Copyright
2003–2011, Texas Instruments Incorporated
3
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