EPR-29 – 4 Output, 11 W, Universal Input, DVD Supply
07-July-03
LG
LL
mm
0.12
26.2
Gap Length
uHenries
Estimated Transformer Primary
Leakage Inductance
LSEC
nHenries
20
Estimated Secondary Trace
Inductance
Secondary Parameters
NSx
2.07 3.00 6.93 6.93Secondary Number of Turns
Rounded Down NSx
2
3.17
3
6
6Rounded to Integer Secondary
Number of Turns
Rounded Down Vox Volts
Rounded Up NSx
10.30 10.30Auxiliary Output Voltage for
Rounded to Integer NSx
7
7Rounded to Next Integer
Secondary Number of Turns
Rounded Up Vox
AWGSx Range
Volts
AWG
5.00
12.13 12.13Auxiliary Output Voltage for
Rounded to Next Integer NSx
23 - 27 20 - 24 25 - 29 31 - 35Secondary Wire Gauge Range
Comment: Primary wire gauge is
less than recommended
minimum (26 AWG) and may
overheat
Tip: Consider a parallel winding
technique (bifilar, trifilar),
increase size of transformer
(larger BW) or reduce margin
(M).
Power Integrations, Inc.
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
Page 16 of 36
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