DER-19

TOP245P Multiple Output Set Top Box

March 30, 2004

Page 20 of 25

Power Integrations, Inc.

Tel: +1 408 414 9200 Fax: +1 408 414 9201

www.powerint.com

11.3 Drain Voltage and Current Start-up Profile

Figure 18 - 265 VAC Input and Maximum Load.

11.4 Load Transient Response

Figure 19 shows the load transient response of the 3V3 rail when subjected to a load

change for 3A to 4A.

Lower – Current at 2A / div, Upper – AC coupled 3V3 voltage at 50mV / div