EPR-32 Datasheet, PDF (13/36 Pages) Power Integrations, Inc. – Engineering Prototype Report for EP-32 − TOPSwitch-GX 25 W Multiple Output DVD, Set-top Box Power Supply Using TOP245P

13-Jul-06
EPR-32 - 25 W Multiple Output TOP245P Supply
7.3 Materials
Item
[1]
[2]
[3]
[4]
[5]
[6]
[7]
[8]
[9]
Description
Core: EEL25, TDK gapped for AL of 202 nH/T²
Bobbin: EEL25 14 pins
Magnet wire: # 32 AWG
Teflon tubing # 22
Copper foil 0.12 mm thick, 14 mm wide.
Tape: 3M 1298 polyester film, 16.1 mm wide
Tape: 3M 1298 polyester film, 22.1 mm wide
Tape: 3M # 44 polyester web, 3.0 mm wide
Varnish
7.4 Transformer Build Diagram
Pin Side
8
12
10
14
13
9
11
13
7
5
4
1
1
NC
+12 V
-24 V
+3.3 V and +5 V
Shield 2
NC
Bias
Primary
Shield 1
NC = No connection to a pin
Figure 5 – Transformer Build Diagram.
The following figure shows the copper foils to be used for +3.3 V and +5 V outputs
(W5 and W6)
Finish Pin 13
#26 Copper
Wire
60 mm
Connect Pin 9
#26 Copper
Wire
90 mm
Start Pin 11
Tape
+5 V_OUT 1T Copper Foil 14.0 mm wide,
0.12 mm Thick.
+3.3 V_OUT 2T Copper Foil 14.0 mm wide,
0.12 mm Thick.
Figure 6 - Copper Foil Winding Information.
Page 13 of 36
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