To reduce the capacitance of a capacitor connected to a DC power supply part by suppressing rush current and relieving burden of a DC power supply, in a DC voltage converting circuit for converting DC voltage supplied from the DC power supply.
This DC voltage converting circuit comprises a first group of transistors Q11 and Q12 connected in series between a first and a second terminals; a second group of transistors Q13 and Q14 connected in series between the second and a third terminals; a capacitor C11 connected between a prescribed connection point of the first group of transistors and a prescribed connection point of the second group of transistors; a capacitor C12 connected between the first and third terminals; switching devices Q21 and Q24 connected to the transistors Q11 and Q14 in parallel; and a control circuit 11 which keeps the transistors off within a prescribed period after DC voltage is supplied between the first and second terminals.
Nao Iku Suzuki
Masaaki Utsunomiya
Atsushi Watanabe
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