| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve a current-control power supply device. <P>SOLUTION: A current-control power supply device according to an embodiment of the present invention comprises a flyback converter for electric insulation between a load end and the current-control power supply device. In a power transformer (flyback converter) having a flyback structure, the current in a primary coil of the transformer is sensed to predict a value of current flowing to a secondary side and the current flowing to the load end is controlled. The device includes a level detector for updating the duty of a switch or the on time by transmitting a reset signal to an integrator and a second sampler in accordance with the period of input power supply, and increases the power factor by adjusting the phase of input voltage and current flowing to the load end, thereby having an advantage of reducing power loss. <P>COPYRIGHT: (C)2013,JPO&INPIT |
