| 摘要 |
<p>Apparatus and methods for an improved light source electronic transformer. In an embodiment, a lamp includes a light source (210) and an electronic ballast (200). The electronic ballast (200) includes a main power converter (202), a controllable starter circuit (204), a transformer (208), a ballast control integrated circuit (IC) (206) connected to the controllable starter circuit and having an output connected to the transformer, and an IC power converter (212) connected to the transformer and having an output connected to the ballast control IC. When the light source is to be switched ON, the controllable starter circuit (204) receives power from the main power converter (202) and provides a high energy output. The ballast control IC (206), in response to a high energy input, outputs a power control signal to the transformer (208) that causes the light source (210) to illuminate and the transformer (208) to provide supply power to the IC power converter (212). The electronic ballast is configured such that after the light source illuminates the controllable starter circuit (204) powers OFF.</p> |
