| 摘要 |
PURPOSE:To simplify a construction inexpensively by detecting a load current value by utilizing counterelectromotive force of the resistance of a reactor of a filter circuit placed on a switching regulator. CONSTITUTION:A main switching element 6 such as a power transistor outputs an output side DC voltage controlled or a load current controlled by variably controlling the time of ON and OFF through a controller 7 while continuously opening or closing an input side DC voltage. Master and slave reactors 9, 13 are for smoothing the load current, and the reactor 13 is also used as detecting the load current. The potentials of the voltage dividing point (a) of the dividing resistors 11, 12 and the point (b) of the load side terminal of the reactor 13 are input to the controller 7. |
