To provide an automatic driving circuit for driving again a self- oscillation converter automatically when the operation is stopped, by transmitting the operating state of the self-oscillation converter to the driving circuit.
The output of a self-oscillation converter 200 is fed to oscillation monitoring circuit 32, and the output of detected oscillation from the oscillation monitoring circuit 32 is fed to a trigger signal generator 33. A trigger circuit driving signal from the trigger signal generating circuit 33 is fed to a trigger circuit 34. A trigger signal output of the trigger circuit 34 is fed as a driving signal input of the self-oscillation converter 200. When the output of the self- oscillation converter 200 is zero or below a given voltage, the driving signal is fed as an driving signal input to the self-oscillation converter 200.
YAMASHITA NOBUHIKO
MURAKAMI NAOKI
