Hitachi RAS-25CNH2 - 12 V Power Circuit

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9. 12V Power Circuit
35V
R101
R104
REG1
C105
0V 0V 0V 0V
0V
12V
D102
L102
C102
R102
R103
8
7
6
5
1
2
3
4
A
B
+
–
Fi
g
. 9 — 1
● DC 35V supplied from the outdoor unit is controlled by switching of regulator 1, and is smoothed by D102,
L102 and C102 to produce 12V.
● Output voltage is divided by R102 and R103, and input to output dividing pin 5 to control switching, so
that output voltage is 12V.
Fig. 9 — 2
Waveform at
A
Waveform at
Out put Voltage
B