| 摘要 |
PROBLEM TO BE SOLVED: To provide a main switch control circuit which controls the loss of a main switch of a power source equipment and reatrains it at a low level. SOLUTION: MOSFET's Q1 and Q2 of a main switch are connected in parallel. The output terminal of a control circuit 1 is connected with the gate of an MOSFET Q1. The output terminal B of a delay circuit 4 is connected with the gate of the MOSFET Q2. By shifting the timing of ON/OFF control of the MOSFET's Q1 and Q2 and controlling them, the switching loss and the conducting loss can be restrained to be low. |
