19-Jul-2005
EP68 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 #3
WDG #4
2T #28 AWG x2
10T #34 AWG
2
6,7
4
WDG #1
10T #34 AWG
WDG #2
8T #34 AWG
3
5
Figure 5 - Transformer Electrical Diagram.
7.2 Electrical Specifications
Electrical Strength
Primary Inductance
1 second, 60 Hz, from Pins 1-5 to Pins 6-10
Pins 1-3, all other windings open
1500 VDC
120 µH,
+/-10%
Resonant Frequency
Primary Leakage Inductance
Pins 1-3, all other windings open
Pins 1-3, with Pins 6/7-9/10 shorted
7.5 MHz (min.)
3.0 µH (max.)
7.3 Materials
Item
Description
[1]
[2]
[3]
[4]
[5]
[6]
[7]
Core: ER14.5, Ferroxcube 3C96, 3F3 (or equivalent), ALG = 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)
Power Integrations
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
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