| 摘要 |
PURPOSE:To provide a power supply in which noises can be suppressed through simple circuitry while protecting a switching element against heating. CONSTITUTION:Upon turn ON of a DC power supply E, an IC circuit 16 is actuated to drive transistors Q15, Q16 alternately at a rate of 1:1. Under a state where the transistor Q15 is turned ON while the transistor Q16 is turned OFF, a control winding CTd turns a transistor Q12 ON while turning a transistor Q11 OFF. The transistor Q12 is turned ON while being delayed through a delay circuit 14. Under a state where the transistor Q15 is turned OFF while the transistor Q16 is turned ON, the control winding CTd turns the transistor Q12 OFF while turning the transistor Q11 ON. The transistor Q11 is turned ON while being delayed through a delay circuit 13. Output pulse from the control winding CTd is superposed on the output from a feedback winding CTa to produce a signal for controlling the transistors Q11, Q12. |
