Hitachi RAS-E10H2 - Page 50

5.
P
o
wer Cir
cuit f
or
P.
W
.B.
W.B.W
• F
ig.
5-1 sho
ws the po
we
r circuit f
or
P.
W.
B.
•
In
the
po
wer
circuit
fo
r
P.
W.
B
.,
po
w
er
supply
f
or
microcomputer
Fig. 5-1
,
per
ipher
al
circuits
,
and
IPM
d
ri
ve
r
circuit and, as w
ell as DC 35V
, are produced
ell as DC 35V, are produced ell as DC 35V
by
s
witching po
wer circuit.
•
Switching
po
w
er
circuit
perf
or
ms
vo
ltage
con
v
ersion
eff
ectiv
ely
by
s
witching
transistor
IC1
to
co
nv
er
t
DC 330V v
oltage to high frequency of about 20kHz to 200kHz.
AC22 0-230V
C012
C013
14
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