Low voltage fluorescent operating circuit

Details Low voltage fluorescent operating circuit Low voltage fluorescent operating circuit

1979-12-21

1982-04-06

Dixon, Harold A.

Electric lamp and discharge devices: systems

Surge generator or inductance in the supply circuit

315DIG2, 315101, 315105, H05B 3700, H05B 3900

Patent

active

043238246

ABSTRACT:
A circuit for starting and operating a low-voltage fluorescent lamp from a 120 volt AC supply. The circuit includes a choke type ballast connected in series with the lamp and inductively coupled to a pulse train generator comprising an RC energy storage circuit connected across the line and a voltage sensitive transistorized relaxation oscillator having a divider network for sensing lamp voltage. In a preferred embodiment the circuit is employed in a preheat mode of operation in combination with an electronic starter circuit comprising a PTC resistor, silicon diode and SCR series connected across the lamp.

REFERENCES:
patent: 3466500 (1969-09-01), Peek
patent: 3701925 (1972-10-01), Nozawa et al.
patent: 4079292 (1978-03-01), Kaneda
patent: 4165475 (1979-08-01), Pegg et al.

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