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参数资料
| 型号： | LMZ2540-7EPD4AHFU |
| 厂商： | POWER-ONE INC |
| 元件分类： | 电源模块 |
| 英文描述： | 2-OUTPUT AC-DC REG PWR SUPPLY MODULE |
| 封装： | 168.50 X 111.20 MM, 38.70 MM HEIGHT, METAL, CASE M02, MODULE |
| 文件页数： | 13/24页 |
| 文件大小： | 536K |
| 代理商： | LMZ2540-7EPD4AHFU |
Rugged Environment
DC-DC Converters <100 W
M-Family
Edition 2/96 - Melcher AG
7 - 21
MELCHER
The Power Partners.
7.1
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
Threshold tolerances and hysteresis:
If
Ui is monitored, the internal input voltage is measured af-
ter the input filter and rectifier (E/LM and LMZ types). Con-
sequently this voltage differs from the voltage at the con-
nector pins by the voltage drop
U
t i across input filter and
rectifier. The threshold level of option V0 is factory adjusted
at
Io nom and TA = 25
°C.The value of Ut i depends upon the
input voltage range (AM, BM, ...), threshold level
U ti, tem-
perature and input current. The input current is a function of
input voltage and output power.
Fig. 23
Relationship between Ui, Uo1, UV, IV and Uo1/Uo nom versus time.
1 VME request: minimum 4 ms
2 t low 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.
U
ti
U
hi
UV low
U
V
U
V high
U
i
P
o
=
P
o
nom
P
o
=
0
P
o
=
0
U
ti
P
o
=
P
o
nom
Fig. 22
Definition of Uti,
Uti and Uhi
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