| 摘要 |
A switching power supply includes a switching element, a diode, a choke coil, a comparator-detector, and a drive circuit. A first resistor and a second resistor are connected in series between one end of the choke coil and the ground, and the connection point thereof is connected to one input end of the comparator-detector. A third resistor and a parallel circuit including a fourth resistor and a capacitor are connected in series between the other end of the choke coil and the ground, and the connection point thereof is connected to the other input end of the comparator-detector. In addition, the output end of the comparator-detector is connected to the input end of the drive circuit, and the output end of the drive circuit is connected to the control end of the switching element.
|
