| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a power supply device that reduces costs and improves power conversion efficiency. <P>SOLUTION: In a power supply device, a step-up power supply circuit 10 includes an inductor L10 whose one end is connected to the positive side of a power supply 11, a diode D10 whose cathode is connected to the other end of the inductor L10 and whose anode is connected to the positive side of a load R10, a N-channel type MOSFET Q10 whose drain is connected to the cathode of the diode D10 and whose source is connected to a ground GND, a control circuit 12 connected to the gate of the MOSFET Q10, a capacitor C10 connected between the anode of the diode D10 and the ground GND, a diode D11 whose cathode is connected to one end of the inductor L10, and resistance R11 connected to the anode of the diode D11 and the positive side of the load R10. <P>COPYRIGHT: (C)2012,JPO&INPIT |
