| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve conversion efficiency by reducing a conduction loss caused by a varied load current. <P>SOLUTION: A power supply includes: a choke coil L61 with one end of a capacitor C62 connected to the output side of the power supply; a main switching element Q61, connected between the input side of the power supply and the choke coil L61, for controlling an output voltage via the choke coil L61; a regenerative diode D61; a comparator I61 for comparing a voltage proportional to the output voltage with a reference voltage, to switch the main switching element Q61 on and off; and a one-shot multivibrator for changing the voltage proportional to the output voltage input to the comparator I61 for a predetermined time so that the on-state of the main switching element Q61 is made to continue for the predetermined time. <P>COPYRIGHT: (C)2013,JPO&INPIT |
