An ignition circuit and method, as may be used for igniting a gas
discharge lamp, are provided. The circuit includes a voltage multiplier
circuit connected to receive a signal corresponding to a DC bus voltage
level from a rectifier circuit. The voltage multiplier circuit includes
first and second voltage storing circuits configured to each respectively
store a voltage level corresponding to a first multiple of the DC bus
voltage level (e.g., at least twice the DC bus voltage level). The
voltage multiplier circuit further includes a peak voltage holding
circuit connected to the first and second voltage storing circuits to
accumulate a voltage level corresponding to a second multiple of the DC
bus voltage level (e.g., at least four times the DC bus voltage level).
The circuit further includes an ignition module having a transformer
selectively connected by way of a switch to the voltage multiplier
circuit through a primary winding to receive the voltage accumulated at
the peak voltage holding circuit, and thereby generate an ignition pulse
voltage applied to the lamp through a secondary winding of the
transformer.