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T Series Data Sheet
?
PFC is active in all operating conditions (voltage regulation,
output power limitation, current limitation).
The power factor control also works with different input voltage
waveforms and frequencies. For special applications with
different frequencies or non-sinusoidal waveforms, please
contact Power-One.
Electrical Output Data
General conditions:
? T A = 20 °C, unless specified.
? V i = 230 VAC, f i = 50 Hz
Table 4: Output data of rectifier versions
500 Watt AC-DC Converters
Efficiency
The extremely high efficiency (see fig. 5) is achieved by using
a single-step power factor corrected topology together with the
most advanced technology in power conversion. It allows a
very compact design in a fully enclosed case without forced
cooling.
Output
LT/UT1201
LT/UT1701
LT1702
Unit
Characteristic
Conditions
min
typ max min
typ max min
typ max
V o set
V o set tol
Output voltage adjustment
V o setting tolerance
V i nom
I o = 0.5 ? I o nom
24.0
24.25
24.5 54.25
54.5
54.75 47.75
48.0
48.25
V
V o
Output voltage over input voltage and load 1
V i min – V i max , 23.35
24.95 52.8
55.8 46.3
49.3
(0.01 – 1) ? I o nom
V o L
Overvoltage protection by second control loop
32.5
59.3
59.3
α Vo
I o nom
Temperature coefficient of output voltage
Nominal output current
–5
16
–5
10
–5
11
mV/K
A
I o L
Current limit 2
V o = 20 V
18 4
14.5
14.5
P o L
Output power limit 2
V i nom
400
550
550
W
v o
Output voltage noise
Low frequency
I o nom
850
1000
1000
mV pp
Switching freq.
Total
IEC/EN 61204
BW = 20 MHz
40
900
40
1000
40
1100
? V o I
? V o V
Static load regulation (droop)
Static line regulation
1
(0.01 – 1) ? I o nom
V i min – V i max ,
– 0.6
0.3
– 1.2
0.8
– 1.2
0.8
V
I o nom
V o d
Dynamic load regulation 3
Voltage deviation V i nom
1.7
2.2
2.2
t d
C o
Internal output capacitance
Recovery time
0.1? I o nom ? I o nom
IEC/EN 61204 5
0.25
86
0.25
41
0.25
41
s
mF
1
2
3
4
5
Output voltage decreases with rising output current due to the droop characterstic to ease current sharing; see fig. 7.
Due to the large output capacitance, the maximum transient value can be much higher.
Deviation limited by output overvoltage protection
No power limitation, but current limitation
See fig. Dynamic load regulation .
BCD20023 Rev AB, 02-Nov-2010
Page 6 of 31
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