DC/DC CONVERTER

摘要

7414-30 A DC/DC converter adapted for producing a plurality of output voltages is described. The DC/DC converter includes a transformer having a primary coil and more than one secondary coil, a switching circuit adapted to turn on and off the supply of the input D.C. voltage to the primary coil, and rectifying and smoothing circuits for rectifying and smoothing the A.C. voltages obtained in the secondary coils. A circuit is provided which operates to obtain the sum of the output voltages from respective rectifying and smoothing circuits, and a control circuit is adapted to receive the lowest D.C. output voltage from the rectifying and smoothing circuits and to control the on-off operation of the switching circuit such that the lowest voltage is maintained at a constant level. The D.C. voltages from respective rectifying and smoothing circuits are obtained by making use of one of the output terminals of the lowest D.C. voltage as a common terminal.