Title:
SWITCHING REGULATOR
Document Type and Number:
Japanese Patent JPS611265
Kind Code:
A
Abstract:
PURPOSE:To stably control an output transistor by supplying an input DC voltage through a series connection made of two resistors to the output transistor, and controlling the potential of the connecting point of the resistors on the base of the voltage of a separately-excited winding. CONSTITUTION:A current of the connecting point of the first and second resistors 16, 17 is flowed through the collector and the emitter of a transistor 20 to a grounding terminal. Since the transistor 20 is controlled by a voltage divided by resistors 18, 19 from a DC voltage VC from a capacitor 9 corresponding to the output DC voltage V0, the base current of an output transistor 6 can be limited in response to the variation of the output DC voltage V0 on the basis of the variation of a commercial AC power source 1. Thus, even if the varying range of the power source 1 is maximum and the hFE of the transistor 6 is maximum, the jumping of the voltage V0 can be prevented.
Inventors:
ZENITANI KENZOU
Application Number:
JP11948684A
Publication Date:
January 07, 1986
Filing Date:
June 11, 1984
Export Citation:
Assignee:
TOSHIBA KK
International Classes:
H02M3/28; (IPC1-7): H02M3/28
Attorney, Agent or Firm:
Susumu Ito
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