參數(shù)資料
型號: LM1901-7EPF
元件分類: 電源模塊
英文描述: 1-OUTPUT 50 W AC-DC REG PWR SUPPLY MODULE
封裝: METAL, CASE M02, MODULE
文件頁數(shù): 15/25頁
文件大?。?/td> 569K
代理商: LM1901-7EPF
Cassette Style
DC-DC Converters
M Series
Edition 01/01.2001
22/25
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 (EM, LM and LMZ types) 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 output current
Io nom and at TA =
25
°C. The value of DU
ti depends upon the input voltage
range (AM, BM, ...), threshold level
Ut, temperature and in-
put current. The input current is a function of the input volt-
age and the output power.
Fig. 24
Relationship between Ui, Uo1, UD, ID and Uo1/Uo nom versus time.
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. 23
Definition of Uti, DUti and Uhi (JFET output)
1 See: Electrical 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
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