D.c. voltage supply circuit for fluorescent lamps

Details D.c. voltage supply circuit for fluorescent lamps D.c. voltage supply circuit for fluorescent lamps

H - Electricity

05

B

315/37

H05B 41/392 (2006.01)

Patent

CA 1284815

ABSTRACT DC Voltage Supply Circuit for Fluorescent Lamps The d.c. voltage supply circuit comprises a flyback converter (13') whose inductivity (16) is alternatingly charged through an electronic switch (T2) and discharged via a diode (17) onto a capacitor 118). The output voltage (UA) of the flyback converter is continuously monitored. If a threshold value is exceeded, the switch (T2) mounted in an input line of the flyback converter is changed into the off-state. The off-state is terminated as soon as the output voltage has again fallen below the threshold value. Due to the d.c.voltage supply circuit, loads requiring a specific d.c.voltage, may be connected to different supply voltages without the need of changeovers. The circuit offers a high security in view of overvoltage from the power network. It is self-monitoring and protects the connected load. (Fig. 4).

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