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| 型号： | CK2540-9ERD3TB1 |
| 英文描述： | 150 Watt DC-DC and AC-DC Converters |
| 中文描述： | 150瓦的DC - DC和AC - DC转换器 |
| 文件页数： | 6/34页 |
| 文件大小： | 605K |
| 代理商： | CK2540-9ERD3TB1 |
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K Series Data Sheet
150 Watt DC-DC and AC-DC Converters
APR 26, 2006 revised to MAY 15, 2006
Page 6 of 34
www.power-one.com
Table 3: Fuse Specification
Model
Fuse type
Reference
Rating
AK
1
BK
1
CK
2
DK
2
EK
2
FK
2
LK
2
fast-blow
fast-blow
slow-blow
slow-blow
slow-blow
slow-blow
slow-blow
Little fuse 314
Little fuse 314
SPT
SPT
SPT
SPT
SPT
30.0 A, 125 V
25.0 A, 125 V
12.5 A, 250 V
8 A, 250 V
4 A, 250 V
16 A, 250 V
4 A, 250 V
1
Fuse size 6.3
x
32 mm
2
Fuse size 5
x
20 mm
Input Fuse
A fuse mounted inside the converter protects the converter
against severe defects. This fuse may not fully protect the
converter when the input voltage exceeds 200 VDC! In
applications where the converters operate at source voltages
above 200 VDC an external fuse or a circuit breaker at system
level should be installed!
The inrush current peak value (initial switch-on cycle) can be
determined by following calculation:
V
I
inr p
= ––––––––––––––––
(R
s ext
+ R
i
+ R
NTC
)
R
s ext
R
i
R
NTC
I
inr p
V
i source
+
C
i int
05109_060805
Reverse Polarity
The converters (except LK) are not protected against reverse
polarity at the input, but in general, only the input fuse will trip. LK
models are fully protected due to the built-in bridge rectifier.
Static Input Current Characteristic
Fig. 5
Typical input current versus relative input voltage
2
3
4
5
1
0.4
1
10
i
_V
V
i min
I
i
(A)
20
04044_051106
FK
CK
EK
DK
BK
AK
LK (DC input)
Input Under-/Overvoltage Lockout
If the input voltage remains below approx. 0.8
V
i minor exceeds
approx. 1.1
V
i max, an internally generated inhibit signal disables
the output(s). When checking this function the absolute maximum
input voltage rating
V
i absshould be considered! Between
V
i min
and the undervoltage lockout level the output voltage may be
below the value defined in table:
Electrical Output Data
.
Fig. 3
Typical inrush current versus time at V
i max
, R
ext
= 0.
For AK, BK, and FK as well as for application-related values
use the formula given in this section to get realistic results.
Inrush Current
The CK, DK, EK, and LK models (not -9, not Option E)
incorporate an NTC resistor in the input circuitry, which - at initial
turn on - reduces the peak inrush current value by a factor of 5
to 10. Subsequent switch-on cycles within short periods
increase the inrush current due to the hotter NTC resistor.
1
2
3
t
[ms]
0
50
100
I
i inr
[A]
150
CK
EK, LK
DK
05108_082605
Fig. 4
Equivalent circuit for input impedance
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