| 摘要 |
A multi-stage ballast for powering a gas discharge lamp includes a power factor correction stage configured to receive an AC input power and produce a phase corrected DC power, a buck regulator stage coupled to the phase corrected DC power and configured to produce a regulated DC power. The buck regulator stage includes a buck switch. The ballast also includes a DC to AC inverter stage coupled to the regulated DC power and configured to produce an AC lamp power, and a microcontroller coupled to the inverter stage and to the buck switch. The microcontroller is configured to determine when the inverter enters transition and to shut off the buck switch for a predetermined period of time after the inverter enters transition. |
