| 摘要 |
PROBLEM TO BE SOLVED: To provide an electronic circuit using an insulated power supply as its power source and equipped with a drive IC 26 for driving a switching element S¥#(¥=u, v, w:#=p, n), the size of which circuit being reducible.SOLUTION: A drive IC 26 includes therein: a high voltage side control unit 38 provided in a high voltage region and used to drive a switching element S¥# using an insulated power supply as its power source; and a third photocoupler 62 for transmitting a signal pertaining to an output voltage Vfb of the insulated power supply from the high voltage region to a low voltage region. The drive IC 26 further includes a low voltage side control unit 64 provided in a low voltage region and exerting feedback control on the output voltage Vfb to bring it to its target value on the basis of the signal transmitted by the third photocoupler 62. |
