| 摘要 |
PROBLEM TO BE SOLVED: To provide a pseudo resonance controlled switching power supply reducing a switching loss and a switching noise by a simple configuration.SOLUTION: The pseudo resonance controlled switching power supply includes: a first switching element having a first gate terminal, a first drain terminal and a first source terminal; a detection unit, connected to the first drain terminal, for detecting the timing of voltage free oscillation generated between the first gate terminal and the first drain terminal after a flyback period; and a drive unit, connected to the detection unit, for outputting a drive signal to the first switching element on the basis of the timing.SELECTED DRAWING: Figure 1 |
