DC-DC Converter for electronic flash unit

Details DC-DC Converter for electronic flash unit DC-DC Converter for electronic flash unit

1980-10-03

1981-12-15

Shoop, William M.

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

315241P, H02M 3335, H05B 4132

Patent

active

043062814

ABSTRACT:
In a DC-DC converter for an electronic flash unit disclosed, an npn transistor is used as an oscillating transistor. The emitter of the npn transistor is connected to a main capacitor of the flash unit at least through a secondary winding of the converter. A diode is connected between the secondary winding and the main capacitor in such a manner that the emitter current of the npn transistor can flow into the main capacitor as an charging current through the secondary winding.

REFERENCES:
patent: 3898514 (1975-08-01), Takahashi
patent: 4130780 (1978-12-01), Ban et al.
patent: 4155029 (1979-05-01), Yamaoka
patent: 4160933 (1979-07-01), Tanaka
patent: 4163178 (1979-07-01), Hosono
patent: 4251753 (1981-02-01), Kondo

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