EPR-33 Datasheet, PDF (11/32 Pages) Power Integrations, Inc. – Engineering Prototype Report for EP 33 - 45 W LCD Monitor External Power Supply using TOP247Y (TOPSwitch-GX)

28-Mar-2003
EPR-33 – 45 W External Adapter Supply
7 Transformer Specification
1
WDG #1
32T
#25 AWG
3
4
WDG #2
3T
3 X #28 AWG
5
9,10
WDG #3
4T
6 X 25 AWG Triple insulated
7,8
Figure 4 – EP-33 Triple Insulated Transformer.
7.1 Electrical Specifications
Electrical Strength
Creepage
60 Hz, 1 min, from Pins 1-5 to Pins 6-10
Between Pins 1-5 and Pins 6-10
Primary Inductance Pins 1-3, all other windings open, measured at 100 kHz
Resonant
Frequency
Primary Leakage
Inductance
Pins 1-3, all other windings open
Pins 1-3, with Pins 6-10 shorted, measured at 100 kHz
3000 VAC
6 mm (Min.)
521 µH,
±10%
1.2 MHz
(Min.)
12 µH
(Max.)
7.2 Materials
Item
[1]
[2]
[3]
[4]
[5]
[6]
[7]
Description
Core: Nippon Ceramic FEE28/21/11, NC-2H material or equivalent. Gap for
AL of 509 nH/T²
Bobbin: 10 Pin EI28, Vertical Mount, Yih Hwa YW-490 or equivalent
Magnet Wire: #25 AWG Double Coated
Magnet Wire: #28 AWG Double Coated
Triple Insulated Wire: #25 AWG
Tape, 3M #1298 or equiv. 8.6 mm wide
Varnish
Page 11 of 32
Power Integrations, Inc.
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www.powerint.com