MC34262 Datasheet, PDF (11/16 Pages) ON Semiconductor – POWER FACTOR CONTROLLERS

MC34262 MC33262
Figure 20. 175 W Universal Input Power Factor Controller
90 to 268 _RFI
Vac _Filter
1 C5
D2 D4
D1 D3
100k
R6 1N4934
8
D6
Zero Current
Detector
+
36V
1.2V
+ ₁₀₀
C4
+ _1.6V/
6.7V
1.4V
5
22k
R4 ^T
2.5V
Reference
UVLO
+ 13V/
8.0V
Delay
Timer R
RS
Latch
16V
10
Drive
7
Output
10
MUR460
D5
VO
+ ^400V/0.44A
MTP
14N50E
330
C3
Q1
1.3M
R5
Current Sense
Comparator
0.01
12k ₃
C2
R3
20k
4
1.5V
Overvoltage
Comparator
10pF
Multiplier
+
1.08 Vref
10µA
Error
Amp
+
Vref ₁
Quickstart
1.6M
R2
0.1
R7
10k
R1
6
2
0.68
C1
Power Factor Controller Test Data
AC Line Input
Vrms
90
Pin
193.3
PF
0.991
Ifund
2.15
Current Harmonic Distortion (% Ifund)
THD
2
3
5
7
2.8
0.18
2.6
0.55
1.0
VO(pp)
3.3
120 190.1 0.998 1.59
1.6
0.10
1.4
0.23 0.72
3.3
138 188.2 0.999 1.36
1.2
0.12
1.3
0.65 0.80
3.3
180 184.9 0.998 1.03
2.0
0.10 0.49
1.2
0.82
3.4
240 182.0 0.993 0.76
4.4
0.09
1.6
2.3 0.51
3.4
268 180.9 0.989 0.69
5.9
0.10
2.3
2.9 0.46
3.4
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 (LP) of 870 µH
Heatsink = AAVID Engineering Inc. 590302B03600
DC Output
VO
IO
PO
402.1 0.44 176.9
402.1 0.44 176.9
402.1 0.44 176.9
402.1 0.44 176.9
402.1 0.44 176.9
402.1 0.44 176.9
η(%)
91.5
93.1
94.0
95.7
97.2
97.8
MOTOROLA ANALOG IC DEVICE DATA
11