| 摘要 |
PURPOSE:To reduce a power loss with a switching loss lessened by discharging a transistor, charged basing upon its junction capacity, via a capacitor connected in parallel to a diode. CONSTITUTION:With capacitor 48 connected to diode 29, charge is accumulated in the junction capacity of transistor Tr14 by pulses and then discharged by way of capacitor 48, coil 16a of SR transformer 15, coil 26a of FB transformer 25, and rectifier circuit 3, so that the collector voltage of Tr14 will damp. With capacitor 49 connected to diode 30, charge accumulated in the junction capacity of Tr14 in the half of flyback time is discharged by way of capacitor 49, deflecting coil 22 and S-shaped correcting capacitor 23 and a damper period after it, it is discharged via damper diode 24. |
