Contents
Type
Input
voltage
Output
voltage
Adaptive
output
Adaptive
frequency
Page
CD-T-0836 SMT 8.5mm width type
< Separate excitation IC drive feasibility >
+1
36
–0.5
32.2
±0.2
4~15V
4.3 max.
1,600
V
O-P
max.
2.5W
40~200
kHz
7
CD-T-0836S SMT 8.5mm width type
< Separate excitation IC drive feasibility >
36
–0.5
32.2
±0.2
+1
8.5 max.
3.8 max.
0.8 max.
4~15V
8.5 max.
1,600
V
O-P
max.
2.5W
40~200
kHz
8
CD-T-1033A SMT 10mm width type
< Separate excitation IC drive feasibility >
33
+1
–0.5
7.0 max.
4~15V
4.5 max
28.7
±0.3
2,000
V
O-P
max.
3W
40~200
kHz
9
CD-T-1033AS SMT 10mm width type
< Separate excitation IC drive feasibility >
33
+1
–0.5
10 max.
28.7
±0.3
3.9 max.
0.8 max.
4~15V
2,000
V
O-P
max.
3W
40~200
kHz
10
10 max.
CD-T-1029 SMT 10mm width type
28.8
+1
–0.5
7.0 max.
25.05
±0.2
5.0 max.
4~15V
2,000
V
O-P
max.
2.5W
60~200
kHz
11
CD-T-1032S SMT 10mm width type
32
+1
–0.5
28.05
±
0.2
5.2 max.
1 max.
10 max.
4~15V
10 max.
2,450
V
O-P
max.
4.5W
40~200
kHz
12
http://www.fdk.co.jp
6.8 max.
2
Contents
Type
Input
voltage
Output
voltage
Adaptive
output
Adaptive
frequency
Page
CD-T-1524 SMT 15mm width type
24
±1
20
±0.5
8.0 max.
4~15V
2,400
V
O-P
max.
6W
30~200
kHz
19
CD-T-1530S SMT 15mm width type
30.1
+1
–1.5
15
±1
26.6
±0.2
3.2 max.
1 max.
4~15V
2,300
V
O-P
max.
3W
40~200
kHz
20
15.5 max.
CD-T-1731 SMT 17mm width type
31.5
±1
27
±0.2
6.5 max.
11.5 max.
4~15V
17.5 max.
2,450
V
O-P
max.
8W
30~200
kHz
21
CD-T-1827 SMT 18mm width type
27
±1
22.5
±0.2
8.5 max.
4~15V
18.5 max.
2,600
V
O-P
max.
10W
30~200
kHz
22
CD-T-1111 SMT 11mm width type
< For flat tube lighting >
10.5 max.
3~9V
2,100
V
O-P
max.
0.5W
15.75
kHz
23
8.5
±0.2
11 max.
3.5 max.
CD-T-1112 SMT 11mm width type
< For flat tube lighting >
10.5 max.
3~9V
2,300
V
O-P
max.
0.6W
15.75
kHz
24
8.5
±0.2
11 max.
5.0 max.
http://www.fdk.co.jp
4
FDK's new-shape cores for transformers
Compact high-performance transformers realized by new-shape cores!
q
Conventional core shape: EED
q
New-shape core: square + “ I ”
[Patented]
JP.
Patent No.2874707
Taiwan.R.O.C. Patent No.124810
Name of Invention Coil parts
Thermal analysis and 3-D magnetic field analysis by CAE
Note 1 below explains what CAE is in concise terms. Using CAE, FDK has compared the flux
density, leakage flux distribution and core loss distribution of two transformers. One incorporates a
conventionally shaped core, while the other has a new-shape core. Despite their shape differences,
both cores are made of the same ferrite material and have the same external dimensions.
Fig. 1 shows a CAE illustration of the two transformer's flux density and leakage flux distribution. In
the conventional transformer (right), leakage fluxes are generated from the core joint and hollow
areas. In the new transformer (left), however, leakage fluxes are generated sparsely and evenly
along the entire core frame, minimizing the adverse effects of leakage fluxes on external devices.
Fig. 2 shows a CAE analysis of core loss distribution. The new transformer sustains much less core
loss than a conventional transformer, because in the first transformer the core jointing efficiency is
improved so that only a low level of flux density is required to generate the same amount of output
power (low-excitation power). Consequently, by assuming the same amount of transformer loss,
the new-shape core can be downsized.
*
Note 1: CAE (computer-aided engineering) is one technology that characterizes FDK. With the
input of conditions and data, simulation or imaginary experiments are performed inside a
supercomputer, and simulation data that are close to measured data are obtained. CAE is ca-
pable of carrying out structural, fluid, electromagnetic field and many other analyses. Field analy-
sis, for example , yields simulation data on inductance, mutual inductance, leakage flux, DC
overlap, flux density distribution, core loss, and the heat generation state.
New-shape core
Conventional core
Fig. 1 : Flux density and leakage flux distribution of a transformer
http://www.fdk.co.jp
Fig. 2 : Ferrite core loss
5
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