Patent ID: 6600297
Filing Date: 2003-07-29
Classification: B60R,G05F

Abstract:
A power supply unit having a series regulator that changes an input DC voltage input from a DC power supply into a stabilized output DC voltage lower than said input DC voltage, comprising:a power consuming unit, provided on a direct current path between said DC power supply and an input side of said series regulator, including a parallel circuit formed by a first fixed resistor and a semiconductor device having a current input, a current output and a setting input; and a current setting unit operable to set an amount of a current flowing between said current input and said current output of said semiconductor device, wherein said current input of said semiconductor device is arranged on a DC power supply side thereof, said current output of said semiconductor device is arranged on a series-regulator side thereof, and said setting input of said semiconductor device is connected to a setting output of said current setting unit.