April 2011
Intermediate to advanced
400 pages
16h 50m
English
Content preview from Power Sources and Supplies: World Class Designs
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291Power Factor Correction
9.2.6 Designing the Voltage Multiplier Input Circuit
The minimum specifi ed maximum linear limit of the input to the multiplier (pin3) is
2.5 V. This level should be the peak value of the divided rectifi ed input waveform at the
highest expected AC input voltage at the crest of the sinusoid (370 V). If a sense current
of 200 A is selected at this point the resistor divider becomes
R
bottom
V
A
K make it K=
25
200
12 5 12
.
.
The true sense current is 2.5 V/12 K 208 A.
The top resistor becomes
R
top
VV
A
Mohms
370 2 5
208
176
.
.
Make this two resistors in series each with a value of 910 K ...
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