| 摘要 |
A ballast with self-oscillating inverter and a high-voltage multiplier circuit is disclosed for providing a DC start mechanism for starting an HID lamp. The high voltage multiplier ignites the lamp using direct current (DC) voltage. This results in low component stresses and lower output voltages than can be realized either by pulse starting or resonant starting techniques. DC starting reduces an output voltage required to start the HID lamp, and can be applied continuously without damaging the inverter. Moreover, the inverter, in self-oscillating mode, is compact while able to operate the HID lamp at frequencies well in excess of 1 MHz. The self-oscillating inverter can also be employed to regulate lamp power.
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