Dallas, Tex. Texas Instruments has introduced two power management chips a dual-phase power factor correction (PFC) controller with Natural Interleaving technology and a new SWIFT dc/dc power management converter that are designed to improve efficiency and reduce energy consumption in digital TVs, in time for the mandatory transition to digital broadcasts in 2009. Digital LCD TVs are reported to require 35 percent more power to operate than older CRT TVs.
The UCC28061 controller, housed in a 16-pin SOIC package, helps facilitate the thinnest LCD TVs by incorporating smaller electromagnetic interference (EMI) filters, smaller or fewer output capacitors and smaller boost inductor volume to deliver thinner power supply designs. The dual-phase transition-mode operation helps lower overall system costs, and is simpler to design than previously used continuous conduction mode controllers, said TI.
The UCC28061 device offers phase management and burst mode features, which provide excellent efficiency at various power levels, including standby mode, said TI. This efficiency makes the UCC28061 suitable to meet ENERGY STAR and 80 Plus efficiency standards. In addition, the dual power stage architecture makes thermal management easier by spreading the heat through more components.
The TPS54331 SWIFT dc/dc converter, housed in an 8-pin package, reduces the power consumption of LCD TV point-of-load circuit board designs. The device's light load increases energy efficiency by more than 25 percent compared to conventional dc/dc converters due to a novel Eco-mode switching technique, 110-uA operating current and low 1-uA shutdown current. The TPS54331 offers a wide input range of 3.5 V to 28 V and an output voltage adjustable down to 0.8 V, and supplies up to 3-A output current, which provides ample power for the digital and analog circuit blocks of an LCD TV.
Pricing: Suggested resale pricing is $1.30 for the UCC28061 and $1.35 for the TPS54331, in quantities of 1,000.
Availability: Available now, reference designs, evaluation modules and the SwitcherPro software tool for the TPS54331 are available at www.ti.com/tps54331evm
Product information: UCC28061 and TPS54331
Texas Instruments, www.ti.com