| 摘要 |
PURPOSE:To provide a power source circuit which can obtain a stable operation by connecting the series two DC/DC converters with an input power source, connecting the outputs in parallel, and controlling the output by the smoothing and delaying output of the input power source and the output DC error voltage. CONSTITUTION:A power source circuit in which two DC/DC converters 1, 2 are connected in series with an input DC power source and its outputs are connected in parallel to obtain an output DC voltage V2, an input side voltage V1 is led through photocouplers 11, 21 to a series circuit of a resistor RA and a capacitor CA to obtain an input voltage smoothing and delaying output, and the output is input to one terminal of a control voltage generator 12. The output V2 and a reference voltage 4 are input to an output voltage error amplifier 3, compared, and the output is input to other input of the generator 12. The output of the generator 12 is input as a pulse width control voltage to a pulse width controller 13. |
