Datasheet

   
   
SLUS517C − DECEMBER 2002 − REVISED SEPTEMBER 2005
18
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APPLICATION INFORMATION
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7
0.0
0.2
0.4
0.6
0.8
1.0
1.4
1.2
1.6
D
PWM
= 0.7
D
PWM
= 0.6
D
PWM
= 0.5
D
PWM
= 0.4
D
PWM
= 0.3
VAC/V
C1
I
C1(rms)
/I
Q2
vs
VAC, f
PFC
:f
PWM
= 1:1
Figure 3. Graph for Finding I
C1(rms)
for the 1X:1X Oscillator Option
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7
0.0
0.2
0.4
0.6
0.8
1.0
1.4
1.2
1.6
1.8
2.0
D
PWM
= 0.7
D
PWM
= 0.6
D
PWM
= 0.5
D
PWM
= 0.4
D
PWM
= 0.3
VAC/V
C1
I
C1(rms)
/I
Q2
vs
VAC, f
PFC
:f
PWM
= 1:2
Figure 4. Graph for Finding I
C1(rms)
for the 1X:2X Oscillator Option