EPR-29 Datasheet, PDF (16/36 Pages) Power Integrations, Inc. – Engineering Prototype Report for EP-29 - Multiple Output 11 W (15.5 W peak) AC-DC Power Supply using TNY268P

EPR-29 – 4 Output, 11 W, Universal Input, DVD Supply
07-July-03
LG
LL
LSEC
mm
uHenries
nHenries
Secondary Parameters
NSx
Rounded Down NSx
Rounded Down Vox Volts
Rounded Up NSx
Rounded Up Vox Volts
AWGSx Range AWG
0.12
Gap Length
26.2
Estimated Transformer Primary
Leakage Inductance
20
Estimated Secondary Trace
Inductance
2.07 3.00 6.93 6.93 Secondary Number of Turns
2
6
6 Rounded to Integer Secondary
Number of Turns
3.17
10.30 10.30 Auxiliary Output Voltage for
Rounded to Integer NSx
3
7
7 Rounded to Next Integer
Secondary Number of Turns
5.00
12.13 12.13 Auxiliary Output Voltage for
Rounded to Next Integer NSx
23 - 27 20 - 24 25 - 29 31 - 35 Secondary 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: [phone] Fax: [phone]
www.powerint.com
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