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參數資料
| 型號： | TPS2492PW |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO14 |
| 封裝： | GREEN, PLASTIC, TSSOP-14 |
| 文件頁數： | 23/33頁 |
| 文件大小： | 1096K |
| 代理商： | TPS2492PW |
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www.ti.com
SLUSA65A – JULY 2010 – REVISED AUGUST 2010
ELECTRICAL CHARACTERISTICS
9 V
≤ VVCC ≤ 80 V, -40°C ≤ TJ ≤ 125°C, VTIMER = 0 V and all outputs unloaded. Typical specification are at TJ = 25°C, VVCC =
48 V (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Supply Current (VCC)
IVCC
Enabled
VUVEN = Hi, VSENSE = VOUT = VVCC
665
1000
A
IVCC
Disabled
VUVEN = Lo, VSENSE = VVCC, VOUT = 0
120
250
Input Supply UVLO (VCC)
VVCC turn on
Rising
8.4
8.8
V
Hysteresis
50
100
150
mV
Current Sense Input (SENSE)
ISENSE
Input bias current
VSENSE = 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
IPROG
0.4
≤ VPROG ≤ 4 V VUVEN = 48 V
5
A
enabled; sourcing or sinking
Pull down resistance; device
RPROG
IPROG = 200 A; VUVEN = 0 V
375
600
Ω
disabled
Power Limiting and Current Limiting (SENSE)
Current limit threshold
VPROG = 2.4 V; VOUT = 0 V; VVCC = 48 V
17
25
33
V(VCC-SENSE) with power limiting
VPROG = 0.9 V; VOUT = 30 V; VVCC = 48 V
17
25
33
trip
mV
Current limit threshold
V(VCC-SENSE) without power
VPROG = 4 V; VSENSE = VOUT
45
50
55
limiting trip
VPROG = 4 V; VOUT = VSENSE; V(VCC-SENSE): 0
Large overload response time to
tF_TRIP
rising to 200 mV; C(GATE-OUT) = 2 nF;
1.2
s
GATE low
V(GATE-OUT) = 1 V
TIMER Operation (TIMER)
VTIMER = 0 V
17
27
36
ISOURCE
TIMER source current
VTIMER = 0 V; TJ = 25°C
22
27
32
A
VTIMER = 5 V
1.5
2.7
3.7
ISINK
TIMER sink current
VTIMER = 5 V; TJ = 25°C
2.1
2.7
3.1
TIMER upper threshold
3.9
4 0
4.1
VTIMER
V
TIMER lower reset threshold
TPS2492 only
0.96
1.00
1.04
DRETRY
Fault retry duty cycle
TPS2493 only
0.5
0.75
1
%
Fault Indicator Output (FLT)
IFLT = 2 mA
0.1
0.25
Low voltage (sinking)
V
IFLT = 4 mA
0.25
0.5
ILEAKAGE
Leakage current
FLT high impedance
10
A
Under-Voltage and Enable Input (UVEN)
VUVEN_H
UVEN rising
1.31
1.35
1.39
V
Threshold voltage
Hysteresis
80
100
120
mV
Leakage current
VUVEN = 48 V
1
A
Copyright 2010, Texas Instruments Incorporated
3
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