Patent ID: 7256547
Filing Date: 2007-08-14
Classification: H01J,H05B,Y02B

Abstract:
1. A self-ballasted fluorescent lamp comprising: a fluorescent lamp; a lighting circuit having a one-package switch, inductors, and capacitors, said one-package switch containing in a single package a pair of field effect transistors that serve as inverter switches for driving the fluorescent lamp, said field effect transistors being complementary; and a circuit board having a first face facing away from said fluorescent lamp and a second face facing towards said fluorescent lamp, said first face having at least both a smoothing capacitor and a current-limiting inductor, which have relatively large dimensions, mounted thereon; wherein: said one-package switch is a generally rectangular surface mounting device with a length and width respectively not exceeding 6 mm and provided with terminals extending from two opposing sides thereof; and said one-package switch is surface mounted on either said first face or said second face of said circuit board through said terminals, wherein paired drain terminals for each complementary field effect transistor are arranged side-by-side and project from one side of the package, and a gate terminal and source terminal for each complementary field effect transistor are arranged side by side and project from an opposing side of the package.