| 摘要 |
PURPOSE:To prevent the ringing of a choke converter by providing a resistor between the base of a switching transistor and the collector of a control transistor. CONSTITUTION:When a base current is supplied to a switching transistor 1 by a starting resistor 8, the transistor 1 is turned ON. When a control transistor 2 is turned ON by a signal received from a controller 7, the transistor 1 is turned OFF. The flyback voltage of the secondary winding 13 is rectified and smoothed to become an output. When a resistor 16 is provided between the base of the transistor 1 and the collector the transistor 2, it can prevent a ringing from occurring at the base current of the transistor 1. |
