Electronic ballast circuit for igniting, supplying and dimming a

Details Electronic ballast circuit for igniting, supplying and dimming a Electronic ballast circuit for igniting, supplying and dimming a

1997-07-23

1999-07-20

Kinkead, Arnold

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Impedance or current regulator in the supply circuit

315307, 315DIG7, 315DIG4, 315225, H05B 4102, H05B 4138

Patent

active

059259850

ABSTRACT:
An electronic ballast circuit for igniting, supplying and dimming a gas discharge lamp which comprises an oscillation control circuit, an IR2155 self-oscillating half-bridge driver, a dimming control circuit, a load circuit including at least one gas discharge lamp and an over-current protection circuit, wherein the oscillation control circuit controls a current through the lamp by pulse width modulation of a drive signal during a pre-heating stage and the normal operation to control the dimming of the gas discharge lamp.

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Internationl Rectifier, Self-Oscillating Half-Bridge Driver, Data Sheet No. PD-6.029G, IR2155, pp. 130-134.

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