Buck converter switching scheme

Details Buck converter switching scheme Buck converter switching scheme

1996-10-07

1999-07-20

Kinkead, Arnold

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Automatic regulation

315223, 315209R, 315219, 315283, 315DIG7, H05B 4129

Patent

active

059259892

ABSTRACT:
A circuit arrangement for igniting and operating a high-pressure discharge lamp is provided with a switching device, inductive device and a rectifier which together form a Buck converter, connected to input terminals for connection to a supply source and output terminals for connection of the lamp. The lamp is supplied with a current through periodic switching of the switching device alternatively into a conducting and a non-conducting state by means of a switch-on and switch-off signal, respectively. The inductive device includes a primary and a secondary winding with the secondary winding forming part of an integration network for generating the switch-off signal. The secondary winding also forms part of a voltage divider network for generating the switch-on signal. A very simple circuit arrangement is thereby achieved.

REFERENCES:
patent: 3969652 (1976-07-01), Herzog
patent: 4694240 (1987-09-01), Grunsch
patent: 5068572 (1991-11-01), Blankers
patent: 5490055 (1996-02-01), Boylan et al.

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