
K Series with PFC Data Sheet
150 – 280 Watt AC-DC Converters
Output Voltage Regulation
V o2 [V]
The following figures apply to single-output or double-out-
put models with parallel-connected outputs.
V o
V o nom 05001a
0.98
13
12.5
12.0
11.5
11
10.5
05083a
I o1 =100%
I o1 = 50%
I o1 = 10%
0.5
0
0.2
0.4
0.6
0.8
1
I o2 / I o2 nom
I o
I oL
Fig. 15
Models with 2 outputs 12 V: ? V o2 versus I o2 with various I o1 (typ).
0
0.5 1.0
Fig. 13
Typical output characteristic V o versus I o .
I o
I o nom
V o2 [V]
16.5
16
05084a
I o1 = 100%
I o1 = 50%
I o1 = 10%
V o
15.5
V od
t d
V o ±1%
V od
t d
V o ±1%
t
I
15
14.5
14
13.5
I o / I o nom
0
0.2
0.4
0.6
0.8
1
I o2 / I o2 nom
1
Fig. 16
0.5
0
≥ 10 μs
≥ 10 μs
05102c
t
Models with 2 outputs 15 V: ? V o2 versus I o2 with various I o1 (typ).
Fig. 14
Typical dynamic load regulation of V o .
Output Regulation of Double-Output Models
Output 1 is under normal conditions regulated to V o nom ,
independent of the output currents.
V o2 depends upon the load distribution. If both outputs are
loaded with more than 10% of I o nom , the deviation of V o2
V o2 [V]
27
26
25
24
23
22
05085a
I o1 = 100%
I o1 = 50%
I o1 = 10%
remains within ±5% of V o1 . The following 3 figures show the
regulation with varying load distribution.
Two outputs of a double-output model connected in parallel
21
0
0.2
0.4
0.6
0.8
1
I o2 / I o2 nom
behave like the output of a single-output model.
Note: If output 2 is not used, we recommend connecting it in
parallel with output 1. This ensures good regulation and
efficiency.
Fig. 17
Models with 2 outputs 24 V: ? V o2 versus I o2 with various I o1 (typ).
BCD20001-G Rev AC, 16-Dec-2010
Page 12 of 29
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