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參數(shù)資料
| 型號： | LS2540-9RD3B2 |
| 廠商： | POWER-ONE INC |
| 元件分類： | 電源模塊 |
| 英文描述： | 2-OUTPUT 100 W AC-DC REG PWR SUPPLY MODULE |
| 封裝： | METAL, CASE S02, MODULE |
| 文件頁數(shù)： | 30/33頁 |
| 文件大?。?/td> | 438K |
| 代理商： | LS2540-9RD3B2 |
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S Series Data Sheet
100 Watt AC-DC and DC-DC Converters
APR 26, 2006 revised to SEP 25, 2006
Page 6 of 33
www.power-one.com
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 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:
Vi source
Iinr p = ––––––––––––––––
(
Rs ext + Ri + RNTC)
Rs ext
Ri
RNTC
Iinr p
Vi source
+
Ci int
05109_060805
Reverse Polarity
The converters (except LS) are not protected against reverse
polarity at the input, but in general, only the input fuse will trip. LS
models are fully protected due to the built-in bridge rectifier.
Static Input Current Characteristic
Fig. 5
Typical input current versus relative input voltage
23
4
5
6
1
2
5
10
FS
CS
ES
LS (DC input)
Vi
Vi min
Ii [A]
DS
20
0.5
AS
BS
04037_011906
Input Under-/Overvoltage Lockout
If the input voltage remains below approx. 0.8 Vi min or exceeds
approx. 1.1 Vi max, an internally generated inhibit signal disables
the output(s). When checking this function the absolute maximum
input voltage rating Vi abs should be considered! Between Vi 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 Vi max, Rext = 0.
For AS, BS, and FS as well as for application-related values
use the formula given in this section to get realistic results.
Inrush Current
The CS, DS, ES, and LS 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
23 t [ms]
0
50
100
Ii inr [A]
150
CS
ES, LS
DS
04038_110705
Fig. 4
Equivalent circuit for input impedance
Table 3: Fuse Specification
Model
Fuse type
Reference
Rating
AS
1
fast-blow
Little fuse 314
30.0 A, 125 V
BS
1
fast-blow
Little fuse 314
25.0 A, 125 V
CS
2
slow-blow
SPT
12.5 A, 250 V
DS
2
slow-blow
SPT
8 A, 250 V
ES
2
slow-blow
SPT
4 A, 250 V
FS
2
slow-blow
SPT
16 A, 250 V
LS
2
slow-blow
SPT
4 A, 250 V
1 Fuse size 6.3 x 32 mm
2 Fuse size 5 x 20 mm
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