MC33368_11 Datasheet, PDF (13/16 Pages) ON Semiconductor – High Voltage GreenLine Power Factor Controller

2X Step-up
Isolation
Line ^{Autoformer Transformer}
115 Vrms
Input
Neutral
MC33368
AC Power
Analyzer
PM 1000
W
V_D
1
0
HI
VA PF V_rms A_rms
A
Acf Ainst Freq HARM
L.O.
HI
V
L.O.
Voltech
EMI Filter
T
0.1
0 to 270 Vac
1.0 ^{Output to}
Power Factor
Correction
Circuit
An RFI filter is required for best performance when connecting the preconverter directly to the ac line. The filter attenuates the level of high
frequency switching that appears on the ac line current waveform. Figures 16 and 17 work well with commercially available two stage filters
such as the Delta Electronics 03DPCG6. Shown above is a single stage test filter that can easily be constructed with four ac line rated
capacitors and a common−mode transformer. Coilcraft CMT3−28−2 was used to test Figures 16 and 17. It has a minimum inductance of 28 mH
and a maximum current rating of 2.0 A. Coilcraft CMT4−17−9 was used to test Figure 20. It has a minimum inductance of 17 mH and a
maximum current rating of 9.0 A. Circuit conversion efficiency η (%) was calculated without the power loss of the RFI filter.
Figure 18. Power Factor Test Setup
D2
D4
C5
1.0
92 to EMI _D1
D3
270 Vrms Filter
16 Line
V_ref
V_ref
MC33368
1N4148
On/Off
Input
5.0 V Off
0 V On
R8
10 k
C9
330 mF
RD
2
AGND
8
1.5 V
R5
1.3 M
Q Timer R
R_S Latch
R
R
S
SQ
S
Set Dominant
Overvoltage
Comparator
Low
Load Detect
1.08 x V_ref
15 V
UVLO
Zero
Current
Detect
13/8.0
1.2/1.0 ^{6.9 V}
Frequency
Clamp
Quickstart
Leading Edge
Blanking
Mult
5
R3
C2
Multiplier
10 k ^0.01
4 Comp
C1
22
5.0 V
Reference
1 V_ref
C6
V_ref
0.1
V_{CC 3 FB}
10 k
1.0 k
2N3904
1.0 k
V_{CC D8}
R13
51 D6
12
C4
100
7 _{15 V}
ZCD R4
T
22 k
Gate
11
PGND
R11 ^Q1
10
10
13
FC
9
LEB
6
CS
DC
D5
Out
C3
330
MTW14N50E
R2
820 k
R7
0.1
R1
10 k
Figure 19. On/Off Control
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