| 摘要 |
PURPOSE:To simplify a power supply device requiring many outputs and to keep output voltage current at a set value highly accurately by simultaneously controlling the modulation of pulse width of plural power supply systems only by one control device under digital control. CONSTITUTION:A microcomputer CPU sets the control pulse width values of respective power output units in accordance with objective output levels previously set in respective power output units and respective output levels of feedback signal generating means VR1-VR4, sets the control terminals of switching means Q1-Q4 of plural power output units simultaneously to the 1st level in each prescribed reference period synchronized with the output signal of a clock signal generating means XT and sets the control terminals of the respective means Q1-Q4 to the 2nd level at the timing corresponding to the control pulse width values corresponding to respective power output units. In addition, the microcomputer CPU executes one of A/D conversion processing and control width value setting for one power output unit out of plural units in accordance with a processing parameter and updates the processing selection parameter. |
