NXP Semiconductors, a provider of high performance mixed signal and standard product solutions, has announced a series of enhancements to its family of class-AB audio amplifiers designed to improve quiescent current reduction and decrease smart phone signal interference in automotive applications.
“In-car use of smart devices has become common over the past few years, but the potential interference they generate creates a major headache for audio OEMs aiming to provide excellent sound performance,” Torsten Lehmann, senior vice president and general manager of car entertainment solutions at NXP Semiconductors, said. “These new amplifiers significantly reduce the effect that smart device signals can have on the speaker cable, while delivering superior sound performance.”
According to the company, the new TDF8546, TDF8546A and TDF8548A amplifiers are “quad-channel Class-AB amplifiers available with the company’s ground-breaking ‘best efficiency mode’ operating as low as 6V and reducing power dissipation by 17 percent compared to other high-efficiency solutions in its class. Both amplifiers enable a seamless audio experience during sudden supply voltage drops in hybrid electric vehicles and other cars using start-stop systems.”
“Integrated GSM input filtering is built-in for increased EMC robustness,” the company adds. “The TDFA8546A (4x 25Watt) and TDF8548A (4x 28 Watt) are also the industry’s first Class-AB amplifiers to extend line driver detection to 1k Ohm load impedance.”
