| 摘要 |
PURPOSE:To realize a switching operation not being affected by a storage time of a switching element driven in a self-exciting manner, even when the turns ratio of a secondary winding of a feedback transformer is not set precisely, by connecting a circuit of a simple construction to the switching element. CONSTITUTION:A charging-discharging circuit composed of a resistor R15 and a capacitor C11 and a transistor Q11 which is controlled directly by charging and discharging of the capacitor C11 and intercepts a drive signal of a switching element Q connected to a feedback transformer T1 are connected to the switching element Q1 connected to the aforesaid feedback transformer. |
