EPR-34 Datasheet, PDF (11/28 Pages) Power Integrations, Inc. – Engineering Prototype Report for EP 34 - Single Output 30 W AC-DC Power Supply

10-Feb-2004
EPR-34 – 12 V, 30 W, Universal Input
7 Transformer Specification
7.1 Electrical Diagram
1
WDG #1 58T
#26 AWG
3
5
WDG #2 5T
2 x #26 AWG
4
9, 10
WDG #3 6T
4 x #25 AWG
Triple Insulated
6, 7
Figure 4 – EP-34 Triple Insulated Transformer.
7.2 Electrical Specifications
Electrical Strength
Primary Inductance
Resonant Frequency
Primary Leakage Inductance
1 second, 60 Hz, from Pins 1-5 to Pins 6-10
Pins 1-3, all other windings open, measured at
100 kHz, 0.4 VRMS
Pins 1-3, all other windings open
Pins 1-3, with Pins 6-10 shorted, measured at
100 kHz, 0.4 VRMS
7.3 Materials
3000 VAC
827 µH, ±10%
750 kHz (Min.)
20 µH (Max.)
Item
[1]
[2]
[3]
[4]
[5]
[6]
[7]
[8]
Description
Core: EF25 Nippon Ceramic NC-2H material or equivalent. Gapped for AL of 246 nH/T²
Bobbin: 10 pin EF25, Vertical Mount, Miles-Platts FE0100 with TBS-601 pins or equivalent
Magnet Wire: #26 AWG Double Coated
Triple Insulated Wire: #25 AWG
Tape, 3M #44 or equivalent 1.5 mm wide (min.)
Tape, 3M #1298 or equivalent 14.2 mm wide
Tape, 3M #1298 or equivalent 15.7 mm wide
Varnish
Page 11 of 28
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