| 摘要 |
The present invention is directed to a power supply unit that provides large power supply to the load. The voltage detector 51 generates a voltage detection signal by detecting the voltage generated at the output terminals 21, 22. The current detector 52 generates a current detection signal by detecting the current that runs through the transformer 3. The control circuit 9 uses the voltage detection signal and the current detection signal and thereby controls, in at least one of the first and second switching elements SW 1, SW 2, the timing with which the switching element is turned ON and the length of time that the switching element remains ON, such that the transformer current flows in a continuous mode.
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