AN3233 Datasheet, PDF (33/35 Pages) STMicroelectronics – This application note describes the characteristics

AN3233
Transformer specifications
Table 8. Transformer winding data
Pins
Winding
RMS current
2-4
8 - 11
9 -10
10 - 13
12 - 14
6-7
PRIMARY
SEC-1A⁴
SEC-1B⁴
SEC-2A⁽¹⁾
SEC-2B⁴
AUX⁽²⁾
1.2 A_RMS
5 A_RMS
5 A_RMS
5 A_RMS
5 A_RMS
0.05 A_RMS
1. Secondary windings A and B are in parallel
2. Aux winding is wound on top of primary winding
Number of turns
34
2
2
2
2
3
Wire type
30 x φ 0.1 mm – G1
90 x φ 0.1 mm – G1
90 x φ 0.1 mm – G1
90 x φ 0.1 mm – G1
90 x φ 0.1 mm – G1
φ 0.28 mm– G2
Mechanical aspect and pin numbering
● Maximum height from PCB: 30 mm
● Coil former type: horizontal, 7+7 pins (pins #3 and #5 are removed)
● Pin distance: 5.08 mm
● Row distance: 25.4 mm.
Figure 28. Transformer overall drawing
39 MAX
30 MAX
25.4
39 MAX
LABEL
3 MIN
5.08
Ø1.1 (x12) / PCB hole Ø1.6
MISSING PIN 3 AND 5
AS PCB REFERENCE
PIN SIDE VIEW
12
4
67
QUOTES IN MILLIMETERS, DRAWING NOT IN SCALE
14 13 12 11 10 9 8
Manufacturer
● Magnetica - Italy
● Transformer P/N: 1860.0034
Doc ID 17595 Rev 1
33/35