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參數(shù)資料
| 型號： | LM2540-9EPV2F |
| 元件分類： | 電源模塊 |
| 英文描述： | 2-OUTPUT 50 W AC-DC REG PWR SUPPLY MODULE |
| 封裝： | METAL, CASE M02, MODULE |
| 文件頁數(shù)： | 17/25頁 |
| 文件大小： | 569K |
| 代理商： | LM2540-9EPV2F |
Cassette Style
DC-DC Converters
M Series
Edition 01/01.2001
24/25
3
5.1 V
4.875 V
0
U
i [V DC]
0
t
U
ti + Uhi
U
ti
Input voltage failure
Switch-on cycle
Input voltage sag
Switch-on cycle and subsequent
input voltage failure
U
V high
U
V low
U
V
0
V2
t
U
o1
0
U
V high
U
V low
U
V
0
V2
U
i
U
ti
4
Output voltage failure
0
U
V high
U
V low
U
V
3
U
ti + Uhi
t
low min
2
t
low min
2
t
low min
2
3
4
U
V high
U
V low
U
V
0
V3
t
3
t
low min
2
t
low min
2
3
t
h
1
2.0 V
t
h
1
4
3
4
t
low min
2
V3
5.1 V
4.875 V
0
U
o1
2.0 V
Input voltage monitoring
Output voltage monitoring
11010
t
Threshold tolerances and hysteresis:
If
Ui is monitored, the internal input voltage is measured af-
ter the input filter and rectifier (EM, LM and LMZ types).
Consequently this voltage differs from the voltage at the
connector pins by the voltage drop
U
t i across input filter
and rectifier. The threshold level of option V0 is factory ad-
justed at
Io nom and TA = 25
°C. The value of U
t i depends
upon the input voltage range (AM, BM, ...), threshold level
Ut i, temperature and input current. The input current is a
function of input voltage and output power.
Fig. 27
Relationship between Ui, Uo1, UV, IV and Uo1/Uo nom versus time.
DUti
Uhi
UV low
UV
UV high
Ui
P
o
=
P
o
nom
P
o
=
0
P
o
=
0
Uti
P
o
=
P
o
nom
11023
Fig. 26
Definition of Uti,
U
ti and Uhi
1 VME request: minimum 4 ms
2 tlow min = 40...200 ms, typically 80 ms
3 UV level not defined at Uo1 < 2.0 V
4 The V signal drops simultaneously with the output voltage, if the
pull-up resistor
RP is connected to Vo1+. The V signal remains
high if
RP is connected to an external source.
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