EPR-71 Datasheet, PDF (9/28 Pages) Power Integrations, Inc. – Engineering Prototype Report for EP 71 - 6.6 W DC-DC Converter Using DPA Switch- (DPA423G)

19-Jul-2005
EP-71 3.3 V, 2 A DC-DC Power Supply
7 Transformer Specification
7.1 Electrical Diagram
ER14.5 3C96 / 3F3,
10 pin Bobbin
1
9,10
WDG #4
10T #34 AWG
WDG #3
2T #28 AWG x2
2
WDG #1
10T #34 AWG
3
6,7
4
WDG #2
8T #34 AWG
5
Figure 5 - Transformer Electrical Diagram.
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
Pins 1-3, all other windings open
Pins 1-3, with pins 6/7-9/10 shorted
7.3 Materials
Item
[1]
[2]
[3]
[4]
[5]
[6]
[7]
Description
Core: ER14.5, Ferroxcube 3C96, 3F3 (or equivalent), A_LG = 312 nH/T²
Bobbin: ER14.5, 10 pin
Magnet wire: #34 AWG, double coated (heavy nyleze)
Magnet wire: #28 AWG, double coated (heavy nyleze)
Tape: 3M 1298 polyester film (or equivalent), 1.8 mm wide
Core clamp ER14.5 Ferroxcube CLM14.5 (optional)
Varnish (DIPPED ONLY, NOT IMPREGNATED)
1500 VDC
120 µH,
+/-10%
7.5 MHz (Min.)
3.0 µH (Max.)
Page 9 of 28
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