| 摘要 |
PROBLEM TO BE SOLVED: To cope with heavy load power, improve power conversion efficiency, and miniaturize a circuit and reduce its weight. SOLUTION: This switching power supply circuit is provided with a voltage- resonance type converter at a primary side, a gap for the center time leg of an insulation converter transformer PIT for obtaining at least a required coarse connection state, and then a half-wave rectifying circuit according to an additive polarity mode at a secondary side. Then, by varying a switching frequency, constant-voltage control is made. |
