DER-42
Portable CD Player – LNK520P
November 18, 2004
7 Transformer Specification
7.1 Transformer Winding
2
7
W4,Secondary,
7T,#28x2(TIW)
W2,Primary,
104T,#36
3
6
4
W5,Bias Wndg,
9T,#35
5
Figure 5 – Transformer Winding
7.1.1 Electrical Specifications
Electrical Strength
Primary Inductance
1 second, 60 Hz, from Pins 1– 5 to Pins 6–7. 3000 VAC
Pins 2-3, all other windings open, measured
2.51 mH – 2.64 mH – 2.77 mH
at 42 kHz, 0.4 VRMS
Resonant Frequency Pins 2-3, all other windings open
300 kHz (Min.)
Pins 2-3, with all other pins shorted,
measured at 132 kHz, 0.4 VRMS
Primary Leakage
Inductance
83 µH (Max.)
Power Integrations
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