ETD Geometry

The chart below shows the various power capabilities
of each size ETD core with a given topology and frequency.
All numbers shown are in Watts and reflect typical power materials
used by Rhombus Industries with core loss at
100 mW/cm3 for a 250C temperature rise
All numbers rounded down to lowest whole number.


Size/Topology
20 kHz
50 kHz
100 kHz
200 kHz
ETD29
Flyback
16
33
41
49
Forward Converter
16
41
68
82
Push Pull
55
109
137
164
ETD34
Flyback
29
57
72
86
Forward Converter
29
72
119
143
Push Pull
96
191
239
287
ETD39
Flyback
53
106
133
159
Forward Converter
53
133
221
265
Push Pull
177
354
442
530
ETD44
Flyback
89
178
222
266
Forward Converter
89
222
370
444
Push Pull
296
592
740
888
ETD49
Flyback
138
276
346
415
Forward Converter
138
346
576
691
Push Pull
461
922
1152
1382
ETD54
Flyback
212
425
531
637
Forward Converter
212
531
885
1062
Push Pull
708
1416
1770
2124
ETD59
Flyback
323
647
808
970
Forward Converter
323
808
1347
1616
Push Pull
1078
2155
2694
3233

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