October 2011:- Texas Instruments (TI) introduced two highly integrated, phase-dimmable AC/DC LED lighting drivers, LM3448 and TPS92070, for use in solid state lighting residential, architectural, commercial and industrial applications, such as retrofit bulbs, LED ballasts, downlights, spot lights and other luminaires.

Phase-Dimmable AC/DC LED Lighting Drivers ControllerThe National LM3448 adaptive, constant-off time AC/DC constant current LED regulator integrates a 600-V MOSFET and is optimized for 2-W to 8-W dimmable LED lighting drivers. The TPS92070 flyback AC/DC constant current LED driver controller is optimized for 6-W to 20-W dimmable LED lighting drivers. Both products feature thermal shutdown, VCC under-voltage lockout, cycle-by-cycle peak current limit and LED open protection.

To simplify AC/DC LED driver design, TI offers an online navigation tool that delivers a complete LED drive solution tuned to the designer’s specifications, such as AC input voltage, fixture type, isolation and dimming requirements. The recommended solution is provided along with design materials such as datasheets, application notes and evaluation boards. Try out the AC/DC LED driver online navigation tool at http://www.national.com/en/led/bulb/selectortool.html.

The LM3448 and TPS92070 join TI’s portfolio of phase-dimmable LED drivers that include the National LM3450 with power factor correction and phase dimming decoding; the National LM3445, the industry’s first TRIAC dimmable LED driver with both full-range and flicker-free dimming; and the TPS92210, a natural PFC LED lighting driver with cascoded MOSFET.

The LM3448 is available in volume now in a 16-pin SOIC package from TI and its authorized distributors. The suggested retail price is $1.10 in quantities of 1,000. The TPS92070 is available now in a 16-pin TSSOP package and is priced at $0.75 in quantities of 1,000. For information and samples, see: www.ti.com/lm3448-pr and www.ti.com/tps92070-pr.