MC34262, MC33262
http://onsemi.com
12
2
0.68
C
1
1.5V
Error Amp
Overvoltage
Comparator
+
1.08 V
ref
+
Quickstart
10mA
10pF
20k
+
+
1.6V/
1.4V
Timer R
330
C
3
100
C
4
13V/
8.0V
MTP
14N50E
Q
1
1.3M
R
5
Figure 21. 175 W Universal Input Power Factor Controller
+
+
+
RFI
Filter
C
5
D
4
D
3
D
2
D
1
0.01
C
2
6.7V
Zero Current
Detector
V
O
T
UVLO
Current Sense
Comparator
RS
Latch
1.2V
36V
2.5V
Reference
16V
10
Drive
Output
10
Multiplier
Delay
90 to
268 Vac
1
12k
R
3
22k
R
4
100k
R
6
1N4934
D
6
10k
R
1
1.6M
R
2
0.1
R
7
4
7
8
5
3
1
MUR460
D
5
400V/
0.44A
6
V
ref
Power Factor Controller Test Data
AC Line Input
DC Output
Current Harmonic Distortion (% I
fund
)
V
rms
P
in
PF
I
fund
THD
2
3
5
7
V
O(pp)
V
O
I
O
P
O
h(%)
90
193.3
0.991
2.15
2.8
0.18
2.6
0.55
1.0
3.3
402.1
0.44
176.9
91.5
120
190.1
0.998
1.59
1.6
0.10
1.4
0.23
0.72
3.3
402.1
0.44
176.9
93.1
138
188.2
0.999
1.36
1.2
0.12
1.3
0.65
0.80
3.3
402.1
0.44
176.9
94.0
180
184.9
0.998
1.03
2.0
0.10
0.49
1.2
0.82
3.4
402.1
0.44
176.9
95.7
240
182.0
0.993
0.76
4.4
0.09
1.6
2.3
0.51
3.4
402.1
0.44
176.9
97.2
268
180.9
0.989
0.69
5.9
0.10
2.3
2.9
0.46
3.4
402.1
0.44
176.9
97.8
= Coilcraft N2880A
Primary: 78 turns of # 16 AWG
Secondary: 6 turns of # 18 AWG
Core: Coilcraft PT4215, EE 4215
Gap: 0.1043 total for a primary inductance (L
P
) of 870 mH
= AAVID Engineering Inc. 590302B03600
T
Heatsink
This data was taken with the test setup shown in Figure 25.
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