MC34262, MC33262
2
D
2
D
4
Zero Current
Detector
+
1.2V
1.6V/
1.4V
UVLO
+ 13V/
8.0V
16V
Drive
Output
RS
Latch
1.3M
R
5
10
10
7
MUR460
D
5
+
MTW
20N50E
Q
1
+
36V
6.7V
5
C
5
100k
R
6
8
+
1N4934
D
6
100
C
4
22k
R
4
T
90 to RFI
268 Vac Filter
D
1
D
3
2.5V
Reference
V
O
330
C
3
Timer R
Delay
400V/
1.125A
Current Sense
Comparator
20k
1.5V
Overvoltage
Comparator
+
1.08 V
ref
10mA
Error Amp
+
V
ref
10pF
4
330
0.001
0.05
R
7
1.6M
R
2
0.01
C
2
12k
R
3
Multiplier
3
1
10k
R
1
Quickstart
6
2
0.68
C
1
Figure 22. 450 W Universal Input Power Factor Controller
Power Factor Controller Test Data
AC Line Input
Current Harmonic Distortion (% I
fund
)
V
rms
90
120
138
180
240
268
P
in
489.5
475.1
470.6
463.4
460.1
459.1
PF
0.990
0.998
0.998
0.998
0.996
0.995
I
fund
5.53
3.94
3.38
2.57
1.91
1.72
THD
2.2
2.5
2.1
4.1
4.8
5.8
2
0.10
0.12
0.06
0.21
0.14
0.10
3
1.5
0.29
0.70
2.0
4.3
5.0
5
0.25
0.62
1.1
1.6
2.2
2.5
7
0.83
0.52
0.41
0.71
0.63
0.61
V
O(pp)
8.8
8.8
8.8
8.9
8.9
8.9
V
O
395.5
395.5
395.5
395.5
395.5
395.5
I
O
1.14
1.14
1.14
1.14
1.14
1.14
P
O
450.9
450.9
450.9
450.9
450.9
450.9
h(%)
92.1
94.9
95.8
97.3
98.0
98.2
DC Output
This data was taken with the test set鈭抲p shown in Figure 24.
T = Coilcraft P3657鈭扐
Primary: 38 turns Litz wire, 1300 strands of #48 AWG, Kerrigan鈭扡ewis, Chicago, IL
Secondary: 3 turns of # 20 AWG
Core: Coilcraft PT4220, EE 42鈭?0
Gap: 0.180鈥?total for a primary inductance (L
P
) of 190
mH
Heatsink = AAVID Engineering Inc. 604953B04000 Extrusion
http://onsemi.com
13