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5. Power Circuit for P.W.B.
• Fig. 5-1 shows the power circuit for P.W.B.
Z D 0 2
• In the power circuit for P.W.B., power supply for microcomputer, peripheral circuits, and IPM driver
circuit and, as well as DC 35V, are produced by switching power circuit.
• Switching power circuit performs voltage conversion effectively by switching transistor IC1 to convert
DC 330V voltage to high frequency of about 20kHz to 200kHz.
AC220-230V
C 0 0 7
C 0 1 2
C 0 0 8
C 0 1 3
R 4 3
R 4 4
C 0 1 4
C 0 1 5
Fig. 5-1
- 57 -
Microcomputer
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