Ultra-Low-Power, Filter-Free 3.2W Class-D Audio Amplifiers from Nuvoton

10th December 2012
Posted By : ES Admin
Ultra-Low-Power, Filter-Free 3.2W Class-D Audio Amplifiers from Nuvoton
Nuvoton today introduced the NAU82039, a family of new Class-D audio amplifiers designed to optimize portable consumer devices. The new Nuvoton NAU82039 features high-efficiency mono, analog-input 3.2W Class-D power amplifier with 12dB of fixed gain – ideal for mobile consumer electronics such as smart phones, tablet PC, docking stations, portable audio and video players, GPS/Navigators, LCD and LED TVs, and toys.
Lowering both power and noise are essential in the fast-moving, highly competitive market for consumer and portable devices,” said Jae-Hong Oh, senior product marketing manager at Nuvoton. “Our engineers, therefore, spearheaded an intensive effort to define a new generation of Class-D amplifiers – the NAU82039 – designed to address the market’s need for power consumption and reduced switching noise, while delivering an array of other experience-enriching features.”



The NAU82039 mono Class-D audio amplifier sets a new standard in audio amplifiers by offering an ultra-low quiescent current (1.25mA at 3.6V) for output power delivered, allowing the device unparalleled for the portable applications where battery life represents a significant differentiating factor. This new amplifier’s inputs can be configured in either single-ended or differential mode.



Superior EMI Performance, Filter-free



The NAU82039 amplifier does not need an external output filter, as each reduces electromagnetic interference through spread-spectrum-oscillator technology and slew-rate control. Moreover, the NAU82039 provides improved immunity and power supply rejection ratio, or PSRR, of > 90dB at 217Hz, making the devices ideal Class-D audio amplifiers for wireless and AM frequency band applications.







Leap Forward in Efficiency, Power



The Class D topology represents a significant leap forward in both power efficiency and noise minimization in audio devices. Class D amplifiers generate a square wave, making the wave-form binary so that it can be amplified by switching the power devices. The power efficiencies of Class D amplifiers are two-thirds better than those of Class AB devices.







The Class D NAU82039 is capable of driving a 4Ω load with up to 3.2W output power, and features a chip-enable pin for extremely low standby current and fast start-up time of 4ms.



The NAU82039 is available now in Miniature WLCSP-9 (1.21mm x 1.23mm in 0.4mm pitch) package and priced at $0.20.

You must be logged in to comment

Write a comment

No comments




Sign up to view our publications

Sign up

Sign up to view our downloads

Sign up

IFSEC 2019
18th June 2019
United Kingdom EXCEL, London
Sensor+Test 2019
25th June 2019
Germany Nürnberg Messe
The Digital Healthcare Show 2019
26th June 2019
United Kingdom EXCEL, London
unbound london 2019
17th July 2019
United Kingdom Old Truman Brewery, London
DSEI 2019
10th September 2019
United Kingdom EXCEL, London