EPR-00011 - 70 W Adapter 22-Jan-01
Page 12 of 46
Power Integrations Inc
Tel: +1 408 414 9200 Fax: +1 408 414 9201
ww: http://www.powerint.com
6 Transformer Documentation
Transformer, T1 (rev. F)
2
1
HIELD
9T # 26AWG x 2
2
9
3T# 26AWG x 3 T.I.
3
9T # 26AWG x 2
5
6
2 TURNS OF FOIL
WDG #2
WDG #4
WDG #5
11
8
WDG #3
3T# 26AWG x 3 T.I.
WDG #1
1 TURN OF FOIL
CORE CONTACT
ELECTRICAL SPECIFICATIONS:
Electrical strength 60 Hz 1 minute, from Pins 2-6
to Pins 8-12
3000 VAC
Primary Inductance Pins 1-3; all windings open.
Measure at 130kHz
273µH +/-10%
Resonant Frequency Pins 1-3; all windings open. 1.3 MHz (Min.)
Primary leakage
inductance
Pins 1-3; Pins 8,9,11, 12
shorted. Measure at 130kHz.
3µH (Max)
MATERIALS:
Item Description
[1] Core: FPQ26/20-A, TDK PC40 (or equivalent); gapped for ALG=843nH/T
2
Lower lossferrite can be substituted to obtain lower core temperatures.
[2] Bobbin: TDK BPQ26/20-1112CP (or equivalent)
[3] Magnet Wire: # 26 AWG Solderable Double Coated
[4] Triple Insulated Wire: # 26AWG
[5] Copper foil; 8mm wide Thickness=0.051mm (.002”)
[6] Copper foil tape; 3M 1181 (or equivalent) 11mm wide
[7] Tape: 3M 74 Polyester Film (or equivalent) 12mm wide
[8] Tape: 3M 74 Polyester Film (or equivalent) 9.2mm wide
[9] Varnish
[10] Tape: 3M 1298 Polyester Film (or equivalent) 19.5mm wide
