Switching power supply using printed coil type transformer

Details Switching power supply using printed coil type transformer Switching power supply using printed coil type transformer

1995-06-19

1997-08-19

Wong, Peter S.

Electric power conversion systems

Current conversion

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

336184, 336234, 363141, 363 97, 363131, H02M 3335

Patent

active

056594615

ABSTRACT:
An indirect feedback type flyback converter that compares favorably with the direct feedback type flyback converter in controllability of secondary output voltage, wherein the converter is arranged so that a switching signal, which is induced in a secondary winding when a direct current input voltage, applied to a primary winding, is turned ON and OFF by a switching element, is smoothed by rectification and fed to a load and that an output voltage is detected using a switching signal induced in an auxiliary winding to transmit a control signal to the switching element for the purpose of stabilizing the output voltage; wherein the primary, secondary and auxiliary windings are formed on respective coil formation surfaces of a coil laminate as convoluted shaped conductor patterns disposed between a core hole at the center of the pattern and the border of the coil formation surface, with the auxiliary winding being disposed to be near the border of the coil formation surface.

REFERENCES:
patent: 3777296 (1973-12-01), Ohyama et al.
patent: 4622627 (1986-11-01), Rodriguez et al.
patent: 5313381 (1994-05-01), Balakrishnan
patent: 5355301 (1994-10-01), Saito et al.
patent: 5521573 (1996-05-01), Inoh et al.

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