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RDR-91 12 V, 1 A, Universal Input Supply
7 Transformer Specification
11-Feb-13
7.1
Electrical Diagram
Cancellation
NC
WDG # 1
14T #30 AWG X2
Primary
1
WDG # 2
56T #30 AWG
8
Bias
3
4
Secondary WDG # 5
7T #26 T.I.W
WDG # 3
WDG # 4
6T #26 AWG X3
Bias
6T #26 AWG X3
2
5
6
Figure 4 – Transformer Electrical Diagram.
7.2
Electrical Specifications
Electrical Strength
Primary Inductance
Resonant Frequency
Primary Leakage Inductance
7.3
Materials
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 V RMS.
Pins 1-3, all other windings open.
Pins 1-3, with Pins 6-8 shorted, measured at
100 ? kHz, 0.4 V RMS.
3000 VAC
1050 ? H, ±10%
500 kHz (Min.)
50 ? H (Max.)
Item
[1]
[2]
[3]
[4]
[5]
[6]
[7]
[8]
[9]
[10]
Description
Core: PC40EE25-Z, TDK or equivalent Gapped for A L of 335 nH/T 2.
Bobbin: EE25, Vertical, 10 pin – Yih-Hwa part # YW-360-02B.
Magnet Wire: #30 AWG.
Magnet Wire: #26 AWG.
Triple Insulated Wire: #26 AWG
Tape: 3M # 44 Polyester web. 2.0 mm wide..
Tape: 3M 1298 Polyester Film, 2.0 mils thick, 8.6 mm wide.
Tape: 3M 1298 Polyester Film, 2.0 mils thick, 10.7 mm wide..
Tape: 3M 1298 Polyester Film, 2.0 mils thick, 4.0 mm wide.
Varnish (applied by dipping only, not vacuum impregnation).
Power Integrations
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
Page 12 of 35
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