MC34261 Datasheet, PDF (9/13 Pages) Motorola, Inc – POWER FACTOR CONTROLLERS

MC34261, MC33261
Figure 16. 175 W Universal Input Power Factor Controller
85 to 265 _RFI
Vac _Filter
1 C₆
D₂ D₄
D₁ D₃
1.3M
R₇
0.01
12k ₃
C₂
R₃
Delay
Current Sense
Comparator
6
Zero Current
Detector
+
1.2V
+ _1.6V
+ _36V
6.7V
100k
R₈ 1N4934
8
D₆
+ ₁₀₀
C₅
5 22k
R₅
T
2.5V
Reference
Timer R
RS
Latch
UVLO
+ _10V
16V
10
Drive
7
10
Output
10
R₆
MUR460
D₅
MTW
14N50E
V_O
+
180
400V/
0.44A
C₄
Q₁
Multiplier
4
+ ^{Error Amp}
0.5mA
V_ref
330 R₄
1.0nF
C₃
1
2
1.6M
R₂
0.1
R₉
10k
R₁
0.68
C₁
Power Factor Controller Test Data
AC Line Input
Current Harmonic Distortion (%)
V_rms
90
P_in
PF
187.5 −0.998
THD
2.0
2
0.10
3
0.98
5
0.90
7
0.78
V_O(pp)
8.0
120 184.6 −0.997 1.8 0.09 1.3
1.3 0.93
8.0
138 183.6 −0.997 2.3 0.05 1.6
1.5
1.0
8.0
180 181.0 −0.995 4.3 0.16 2.5
2.0
1.2
8.0
240 179.3 −0.993 6.0 0.08 3.7
2.7
1.4
8.0
268 178.6 −0.992 6.7 0.16 2.8
3.7
1.7
8.0
This data was taken with the test set−up shown in Figure 17.
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 of 870 μH
Heatsink = AAVID Engineering Inc. 5903B
DC Output
V_O
400.7
400.7
400.7
400.6
400.6
400.6
I_O
0.436
0.436
0.436
0.436
0.436
0.436
P_O
174.7
174.7
174.7
174.7
174.7
174.7
n(%)
93.2
94.6
95.2
95.6
97.4
97.8
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