Filamenterkennungsschaltung

Details

Veröffentlichungs-Nr.

EP2506688

Aktenzeichen

EP12159981

Anmeldetag

16. März 2012

Veröffentlichung

9. Oktober 2013

Rechtsraum

EP

IPC

H05B41/298

Abstract

Provided is a circuit for detecting a filament of a fluorescent lamp, wherein a first end of a first filament of the fluorescent lamp is connected to a second end of the first filament via an oscillation circuit, and the first end of the first filament is connected to an output of an inverter; a first end of a second filament of the fluorescent lamp is connected to a second end of the second filament via an oscillation circuit, characterized in that: the first end of the second filament is connected to an internal ground; the second end of the second filament is connected to a power source, and a voltage at the second end of the second filament is used for controlling ON and OFF of an MOSFET, wherein a source of the MOSFET is connected to the internal ground, and a drain thereof is connected to the power source via a second resistor and a third resistor; and a node between the second resistor and the third resistor is connected to a VCC pin of an integrated circuit.

Anmelder

Firmen

OSRAM GmbH
OSRAM AG

Land

🇩🇪 Deutschland

Fachgebiete