參數(shù)資料
型號(hào)： LS4501-7R
英文描述： 100 Watt AC-DC Converters with PFC
中文描述： 100瓦交直流轉(zhuǎn)換器的功率因數(shù)校正
文件頁(yè)數(shù)： 4/27頁(yè)
文件大?。?/td> 599K
代理商： LS4501-7R
Cassette Style
100 Watt AC-DC Converters
S Series PFC
Edition 01/01.2001
4/27
R
s ext
R
i
R
NTC
I
inr p
U
i rms
C
i
04001
Input Under-/Overvoltage Lock-out
If the input voltage remains below approx. 65 V AC or ex-
ceeds approx. 280 V AC an internally generated inhibit sig-
nal disables the output(s). When checking this function the
absolute maximum input voltage rating U
i abs
should be
considered! Between U
i 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).
Input Transient Protection
A VDR together with the input fuse and a symmetrical input
fi
lter form an effective protection against high input tran-
sient voltages.
Input Fuse
A fuse mounted inside the converter protects the module
against severe defects. (If operated from a DC-source this
fuse may not fully protect the module when the input volt-
age exceeds 200 V DC! In applications where the convert-
ers operate at source voltages above 200 V DC an external
fuse or a circuit breaker at system level should be installed!)
Table 3:
Fuse Speci
fi
cation
Module
Fuse type
Fuse rating
LS
1
slow-blow
SP T
4 A, 250 V
1
Fuse size 5
×
20 mm
Fig. 3
Equivalent circuit diagram for input impedance.
Electrical Input Data
General Conditions
–
T
A
= 25
°
C, unless T
C
is speci
fi
ed.
–
Pin 18 connected to pin 14, U
o
adjusted to U
o nom
(option P); R input not connected.
–
Sense line pins S+ and S
–
connected to Vo+ and Vo
–
respectively.
Table 2: Input data
Input
LS
Characteristics
Conditions
min
typ
max
Unit
U
i
Operating Input voltage
I
o
= 0...I
o nom
T
C min
...T
C max
85
255
V AC
3,4
U
i nom
Nominal Input voltage
230
I
i
Input current
U
i nom
, I
o nom 1
0.55
A
rms
P
i0
No-load input power
U
i min
…
U
i max
9.0
10
W
P
i inh
Idle input power
unit inhibited
3.5
5
R
i
Input resistance
T
C
= 25
°
C
480
m
R
NTC
NTC resistance
2
3200
4000
C
i
Input capacitance
80
100
120
μ
F
U
i RFI
Conducted input RFI
EN 55022
U
i nom
, I
o nom
B
Radiated input RFI
B
U
i abs
Input voltage limits
without damage
–
400
400
V DC
–
400
400
V
p
1
With double output modules, both outputs loaded with I
o nom
.
2
Valid for -7 versions with NTC, (-9 versions exclude the NTC). Initial switch-on cycle. Subsequent switch-on/off cycles increase the in-
rush current peak value.
3
AC frequency range 47...63 Hz.
4
For DC-input please ask your local Power-One partner.
Reverse Polarity Protection
Should the input voltage to the unit be supplied from a DC
source the built-in bridge recti
fi
er provides reverse polarity
protection. (For DC-input operation, please consult your lo-
cal Power-One partner.)
Inrush Current Limitation
The modules of the versions -7, incorporate an NTC resis-
tor in the input circuitry which
–
at initial turn on
–
reduces
the peak inrush current value by a factor of 5...10 to protect
connectors and switching devices from damage. Subse-
quent switch-on cycles within short periods will cause an
increase of the peak inrush current value due to the warm-
ing-up of the NTC resistor. See also: E option
Inrush Current Peak Value
The inrush current peak value (initial switch-on cycle) can
be determined by following calculation:
U
2
I
inr p
=
––––––––––––––––
(R
s ext
+ R
i
+ R
NTC
)
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