| 摘要 |
PURPOSE:To enhance the accuracy and the efficiency by generating a pulse signal of a pulse width proportional to an output voltage, and supplying or stopping the pulse signal to a drive circuit, thereby eliminating a hunting preventing circuit. CONSTITUTION:A divided voltage produced from an output voltage detector 21 is supplied to a pulse width setter 31, and a pulse signal having a pulse width proportional to the output voltage is generated. This pulse signal is supplied to a converter ON/OFF controller 32. The divided voltage from the detector 21 is compared by a comparator 33 with a reference voltage from a reference voltage generator 35, and the comparison output signal is supplied to the controller 32. The controller 32 becomes ON by the comparison output signal, and the output signal of the setter 31 is supplied through a drive circuit 16 to the converter 13. |
