In typical lamp ballast
applications, the HC908LB8 could help reduce the total number of discreet digital system parts by up to 50 percent.
The new LightMOS(TM) IGBTs offer an cost-optimized alternative to MOSFETs (metal-oxide semiconductor field-effect transistors) typically used in Electronic Lamp Ballasts
(ELB) for fluorescent tubes, allowing a 1-to-1 replacement at approximately a 15 percent lower price with same functionality.
TMOS power transistors (TMOS stands for T-Metal Oxide Semiconductor) are discrete transistors used for switching applications in various consumer products including monitors, disk drives, power suppliers, AC motors, lamp ballast
, and other automotive, industrial and consumer applications.
Many, but not all, "non-linear" lighting loads such as those resulting from the installation of certain common electronic lighting ballasts (typically electronic fluorescent lamp ballasts
for straight-linear--or U-shaped T8 and T5 lamps), often exhibit some varying combination of both types of displacement and distortion power factors, simultaneously.
In November 2011, The Department of Energy (DOE) issued new rules regulating the efficiency of fluorescent lamp ballasts
, which take effect on November 14, 2014.
For example, HPS lamps for use on mercury vapor lamp ballasts
that operate at 10 percent lower power have been described in the literature (Ravi and others 1993).