| 摘要 |
PROBLEM TO BE SOLVED: To provide a synchronous rectification circuit that performs a synchronous rectification operation independently of an inductance component even if using a synchronous rectifying element with a low on resistance.SOLUTION: The synchronous rectification circuit having a synchronous rectifying element Q1 and a synchronous rectifying control circuit IC1 for turning on/off the synchronous rectifying element Q1 in accordance with a current iflowing through the synchronous rectifying element Q1 includes a current detection circuit 1a for detecting the current iflowing through the synchronous rectifying element Q1 as a synchronized voltage waveform during an on period of the synchronous rectifying element Q1. The synchronous rectifying control circuit IC1 turns off the synchronous rectifying element Q1 on the basis of the voltage waveform detected by the current detection circuit 1a. |
