DER-50
Set Top Box Design using TOP245R
April 20, 2005
9 Performance Data
All measurements performed at room temperature, 50 Hz input frequency.
9.1 Efficiency
Efficiency %
80
75
70
65
60
55
50
0
50
100
150
200
250
300
Input Voltage in VAC
Figure 6- Efficiency vs. Input Voltage, Room Temperature, 50 Hz.
9.2 No-load Input Power
1000
900
800
700
600
500
400
300
200
100
0
0
50
100
150
200
250
300
Input Voltage in V
Figure 7- Zero Load Input Power vs. Input Line Voltage, Room Temperature, 50 Hz.
Power Integrations
Tel: +1 408 414 9200 Fax: +1 408 414 9201
Page 18 of 31
www.powerint.com