| 摘要 |
PURPOSE:To stabilize the output voltage and to prevent the occurrence of noise, by flowing a large driving current to accelerate turn-on when a transistor is turned on and completing the discharge of the base stored electric charge in a short time to shorten the storage time when the transistor is turned off. CONSTITUTION:The output of a circuit BUFF turns on and off a transistor (TR)Q1 by an amplifier AMP, an oscillator OSC which determines the switching frequency, and a comparator COMP which determines the switching time. When the TRQ1 is turned on, a current Ic is flowed to the collector, and the electric charge of this current is stored in a transformer T2. This energy is transmitted to the secondary winding side of the transformer T2 when the TRQ1 is turned off, and this energy turns on the TRQ2 with overdrive. When the TRQ1 is turned on, the current of the primary winding of a transformer T1 is flowed through a capacitor C2 so as to discharge the base stored carrier of the TRQ2, and the TRQ2 is switched to the turn-off state in a short time, thus, the storage time is shortened. |
