Application Note AN-1077 - International Rectifier
Application Note AN-1077 - International Rectifier
Application Note AN-1077 - International Rectifier
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<strong>Application</strong> <strong>Note</strong> <strong>AN</strong>-<strong>1077</strong><br />
40<br />
100<br />
20<br />
50<br />
GEA<br />
0<br />
Gain<br />
0<br />
20<br />
50<br />
40<br />
0.1 1 10 100 1 .10 3 1 .10 4 1 .10 5 1 .10 6<br />
frequency<br />
100<br />
0.1 1 10 100 1 . 10 3 1 . 10 4 1 . 10 5 1 . 10 6<br />
frequency<br />
0<br />
10<br />
Figure 14 - Error Amplifier Gain<br />
Figure 16 - Loop Gain @ 90V (blue), 265V (red)<br />
Crossover frequency is between 10Hz and 30Hz,<br />
depending on the input AC line value, as required.<br />
20<br />
0<br />
30<br />
20<br />
Phase<br />
40<br />
50<br />
60<br />
70<br />
80<br />
90<br />
0.1 1 10 100 1 . 10 3 1 . 10 4 1 . 10 5 1 . 10 6<br />
Frequency<br />
Phase<br />
40<br />
60<br />
80<br />
100<br />
120<br />
140<br />
160<br />
Figure 15 - Error Amplifier Phase<br />
180<br />
0.1 1 10 100 1 . 10 3 1 . 10 4 1 . 10 5 1 . 10 6<br />
frequency .<br />
Finally the loop gain can be drawn:<br />
Figure 17 - Loop Phase<br />
<strong>International</strong> <strong>Rectifier</strong> Technical Assistance Center: USA ++1 310 252 7105 Europe ++44 (0)208 645 8015 15 of 18
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