MC34262_11 Datasheet, PDF (13/19 Pages) ON Semiconductor – Power Factor Controllers

MC34262, MC33262
90 to RFI
268 Vac Filter
2 C₅
D₂ D₄
D₁ D₃
Zero Current
Detector
+
1.2V
+ _1.6V/
1.4V
2.5V
Reference
UVLO
36V
6.7V
+ 13V/
8.0V
Delay
Timer R
RS
Latch
16V
10
Drive
Output
10
100k
R₆ 1N4934
8
D₆
+ ₁₀₀
C₄
5 22k
R₄
T
MUR460
D₅
V_{O 400V/}
7
MTW
20N50E
+
330
1.125A
C₃
Q₁
1.3M
R₅
Current Sense
Comparator
0.01
12k ₃
C₂
R₃
20k
4
330
1.5V
Overvoltage
Comparator
10pF
0.001
Multiplier
+
1.08 V_ref
10mA
Error
Amp
+
V_ref
1
Quickstart
1.6M
R₂
0.05
R₇
10k
R₁
6
2
0.68
C₁
Figure 22. 450 W Universal Input Power Factor Controller
Power Factor Controller Test Data
AC Line Input
DC Output
V_rms
90
P_in
489.5
PF
0.990
I_fund
5.53
Current Harmonic Distortion (% I_fund)
THD
2
3
5
7
2.2
0.10
1.5
0.25 0.83
V_O(pp)
8.8
V_O
395.5
I_O
1.14
P_O
450.9
120 475.1 0.998 3.94 2.5 0.12 0.29 0.62 0.52
8.8 395.5 1.14 450.9
138 470.6 0.998 3.38 2.1 0.06 0.70
1.1 0.41
8.8 395.5 1.14 450.9
180 463.4 0.998 2.57 4.1 0.21 2.0
1.6 0.71
8.9 395.5 1.14 450.9
240 460.1 0.996 1.91 4.8 0.14 4.3
2.2 0.63
8.9 395.5 1.14 450.9
268 459.1 0.995 1.72 5.8 0.10 5.0
2.5 0.61
8.9 395.5 1.14 450.9
This data was taken with the test set−up shown in Figure 25.
T = Coilcraft P3657−A
Primary: 38 turns Litz wire, 1300 strands of #48 AWG, Kerrigan−Lewis, Chicago, IL
Secondary: 3 turns of # 20 AWG
Core: Coilcraft PT4220, EE 42−20
Gap: 0.180″ total for a primary inductance (L_P) of 190 mH
Heatsink = AAVID Engineering Inc. 604953B04000 Extrusion
h(%)
92.1
94.9
95.8
97.3
98.0
98.2
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