參數(shù)資料
型號(hào)： FK2540-7RDDT
元件分類(lèi)： 電源模塊
英文描述： 2-OUTPUT 150 W DC-DC REG PWR SUPPLY MODULE
封裝： HEAT SINK, METAL, CASE K02, MODULE
文件頁(yè)數(shù)： 28/31頁(yè)
文件大?。?/td> 637K
代理商： FK2540-7RDDT
Cassette Style
150 Watt DC-DC Converters
K Series
Edition 01/01.2000
6/31
Input Fuse
A fuse mounted inside the converter protects the module
against severe defects. This fuse may not fully protect the
module when the input voltage exceeds 200 V DC! In appli-
cations where the converters operate at source voltages
above 200 V DC an external fuse or a circuit breaker at sys-
tem level should be installed!
Table 3: Fuse Specification
Module
Fuse type
Fuse rating
AK 1
fast-blow
Little fuse 314
30.0 A, 125 V
BK 1
fast-blow
Little fuse 314
25.0 A, 125 V
CK 2
slow-blow
SPT
12.5 A, 250 V
DK 2
slow-blow
SPT
8 A, 250 V
EK 2
slow-blow
SPT
4 A, 250 V
FK 2
slow-blow
SPT
16 A, 250 V
1 Fuse size 6.3
× 32 mm
2 Fuse size 5
× 20 mm
Input Under-/Overvoltage Lock-out
If the input voltage remains below approx. 0.8
Ui min or ex-
ceeds approx. 1.1
Ui max, an internally generated inhibit sig-
nal disables the output(s). When checking this function the
absolute maximum input voltage rating
Ui abs should be
considered! Between
Ui min and the undervoltage lock-out
level the output voltage may be below the value defined in
table:
Output data (see: Technical Information: Measuring
and Testing).
Hold-up Time versus relative Input Voltage
Inrush Current Peak Value
The inrush current peak value (initial switch-on cycle) can
be determined by following calculation: (See also:
Input In-
rush Current Characteristic)
Ui source
Iinr p = ––––––––––––––––
(
Rs ext + Ri + RNTC)
Rs ext
Ri
RNTC
Iinr p
Ui source
+
Ci int
05109
Fig. 4
Equivalent circuit for input impedance
Reverse Polarity
The units are not protected against reverse polarity at the
input to avoid unwanted power losses and may be dam-
aged.
Input Inrush Current Characteristic
1
23
t [ms]
0
50
100
Ii inr [A]
150
CK
EK
DK
05108
Fig. 5
Typical inrush current versus time at Ui max, Rext = 0.
For AK, BK and FK as well as for application related val-
ues use the formula given in Inrush Current Peak Value to
get realistic results.
2
345
6
1
0.10
1.00
Ui
____
Ui min
t h (ms)
10.00
100.00
DK
CK/FK
EK
AK
BK
04045
Fig. 6
Typical hold-up time th versus relative input voltage
Ui/Uimin. The DC-DC converters require an external series
diode in the input path if other loads are connected to the
same input supply lines.
Static Input Current Characteristic
Typical input current versus relative input voltage
23
4
5
1
0.40
1.00
10.00
U
i
____
U
i min
I
i (A)
20.00
04044
FK
CK
EK
DK
BK
AK
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