MC34262, MC33262
1
D
2
90 to RFI
268 Vac Filter
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
+
MTP
14N50E
Q
1
+
36V
6.7V
5
C
5
100k
R
6
8
+
1N4934
D
6
100
C
4
22k
R
4
T
D
1
D
3
2.5V
Reference
V
O
400V/
330 0.44A
C
3
Timer R
Delay
Current Sense
Comparator
20k
1.5V
Overvoltage
Comparator
+
1.08 V
ref
10mA
Error Amp
+
V
ref
10pF
4
0.1
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 21. 175 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
193.3
190.1
188.2
184.9
182.0
180.9
PF
0.991
0.998
0.999
0.998
0.993
0.989
I
fund
2.15
1.59
1.36
1.03
0.76
0.69
THD
2.8
1.6
1.2
2.0
4.4
5.9
2
0.18
0.10
0.12
0.10
0.09
0.10
3
2.6
1.4
1.3
0.49
1.6
2.3
5
0.55
0.23
0.65
1.2
2.3
2.9
7
1.0
0.72
0.80
0.82
0.51
0.46
V
O(pp)
3.3
3.3
3.3
3.4
3.4
3.4
V
O
402.1
402.1
402.1
402.1
402.1
402.1
I
O
0.44
0.44
0.44
0.44
0.44
0.44
P
O
176.9
176.9
176.9
176.9
176.9
176.9
h(%)
91.5
93.1
94.0
95.7
97.2
97.8
DC Output
This data was taken with the test set−up shown in Figure 24.
T = Coilcraft N2880−A
Primary: 78 turns of # 16 AWG
Secondary: 6 turns of # 18 AWG
Core: Coilcraft PT4215, EE 42−15
Gap: 0.104″ total for a primary inductance (L
P
) of 870
mH
Heatsink = AAVID Engineering Inc. 590302B03600
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