DER-50
Set Top Box Design using TOP245R
April 20, 2005
10 Waveforms
10.1 Drain Voltage and Current, Normal Operation
Figure 9 - 90 VAC, Full Load.
Upper: IDRAIN, 0.5 A / div
Lower: VDRAIN, 100 V, 2 µs / div
Figure 10 - 265 VAC, Full Load
Upper: IDRAIN, 0.5 A / div
Lower: VDRAIN, 200 V / div
10.2 Output Voltage Start-up Profile (from Transformer Outputs only)
Figure 11 – 3V3 Start-up Profile, 90VAC
Figure 12 – 5V Start-up Profile, 90 VAC
1 V, 10 ms / div.
1 V, 10 ms / div.
Power Integrations
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