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參數(shù)資料
| 型號(hào)： | LM2540-7ERD7AHF |
| 廠商： | POWER-ONE INC |
| 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)： | 14/24頁 |
| 文件大小： | 982K |
| 代理商： | LM2540-7ERD7AHF |
Cassette Style
AC-DC Converters
M Series
Edition 5/5.2000
21/24
0
1
0.95
0
U
i [V DC]
0
t
low min
4
t
low min
4
t
high min
t
h
1
U
ti +Uhi
U
ti
Input voltage failure
Switch-on cycle
Input voltage sag
Switch-on cycle and subsequent
input voltage failure
U
D high
U
D low
U
D
0
JFET
NPN
t
U
o1
U
o1 nom
U
D high
U
D low
U
D
t
low min
4
t
h
1
0
U
D high
U
D low
U
D
0
JFET
NPN
U
o1
U
D high
U
D low
U
D
t
low min
4
U
to
3
Output voltage failure
0
I
D high
I
D low
I
D
t
0
I
D high
I
D low
I
D
t
3
2
33
U
o1 nom
U
to +Uho
Input voltage monitoring
Output voltage monitoring
11008
Threshold tolerances and hysteresis:
If
Ui is monitored, the internal input voltage after the input
filter and rectifier is measured. Consequently this voltage
differs from the voltage at the connector pins by the voltage
drop
DUti across input filter and rectifier. The threshold level
of the D0 and D9 options is factory adjusted at nominal out-
put current
Io nom and at TA = 25
°C. The value of DU
ti de-
pends upon the threshold level
Ut, temperature and input
current. The input current is a function of the input voltage
and the output power.
Fig. 27
Relationship between Ui, Uo1, UD, ID and Uo1/Uo nom versus time.
1 See "El. output data" for hold-up time.
2 With output voltage monitoring the hold-up time th = 0
3 The D signal remains high if the D output is connected to
an external source.
4 tlow min = 40...200 ms, typically 80 ms
DUti
Uhi
UD low
UD
UD high
Ui
P
o
=
P
o
nom
P
o
=
0
P
o
=
0
Uti
P
o
=
P
o
nom
11021
Fig. 26
Definition of Uti, DUti and Uhi (JFET output)
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