Digital audio SoC family enables cooler new flat-panel TV designs
August 05, 2011 // Paul Buckley
STMicroelectronics has released two new Sound Terminal digital-audio system-on-chip ICs for home-entertainment applications, which will enable smaller new-product designs while also running cooler to help designers meet tough product-safety requirements.
Home-entertainment innovations such as flat-panel TVs and music docks enable consumers to enjoy room-filling audio without needing a roomful of audio equipment. ST’s Sound Terminal system-on-chip ICs have taken a leading role in enabling new generations of smaller, slimmer products by combining digital audio processing, speaker drivers and other functions on a single chip. ST’s Sound Terminal ICs are now used in about 30% of the flat-panel TVs sold worldwide, based on data from market analyst iSuppli.
The new STA381BW and STA381BWS are optimized for flat-panel TVs and enable designers to reduce pc-board sizes further by consolidating a headphone driver, line-driver output, and an independent digital-to-analog converter (DAC). These functions typically require three additional ICs. The integrated DAC provides an extra analog output that can be connected to the headphone input or to an external circuit, and uses ST’s F3X technology to simplify external filtering. The headphone driver and industry-standard 2Vpp line out, which require no DC blocking capacitors, also save external components and hence maximize reductions in pc-board size and manufacturing costs.
In addition, the STA381BW and STA381BWS deliver best-in-class thermal performance through a combination of high energy efficiency, proprietary ternary PWM modulation and enhanced package design, enabling lower operating temperatures. This simplifies thermal management, helping to ensure that the TV’s chassis temperature meets product safety criteria such as UL or CE specifications. The STA381BW and STA381BWS can deliver up to 15 W output power (24 V, 8 ohm load), maintaining the IC’s temperature at 55.4°C.
As members of the Sound Terminal family, the new devices implement digital signal processing and speaker-driver circuitry applying ST’s Full Flexible Amplification (FFX) technology. FFX combines 2.1-channel audio processing with a digitally controlled class-D power stage operating at up to 94% efficiency. The audio processor also features STSpeakerSafe, STCompressor as well as STSpeakerTune speaker compensation, which boosts audio quality from flat-panel TV speakers while preventing damage due to over-driving.
The STA381BW and STA381BWS are sampling now to lead customers, and are available in the 48-pin VQFN 7 x 7 x 1 mm package, priced from $3.00 for the STA381BWS and $4.00 for the STA381BW for 1000-piece orders.
Visit STMicroelectronics at www.st.com.
Micrel's 10 criteria for choosing a MEMS foundry
April 18, 2014
Micrel Inc. (San Jose, Calif.) has prepared an article that lays out the 10 criteria to help guide someone in the choice ...
Superconducting qbits made immune to quasiparticle energy loss
The Filter Wizard: Just add a transistor
Mobile display revenues soar, leaving TV behind
European organic PV project aims for material gains
Nanomaterial-packed cathode extends range of EV lithium-sulfur batteries
April 17, 2014
Researchers at the USA's Department of Energy Pacific Northwest National Laboratory have developed a metal organic framework ...
Wearable computing market on 78% CAGR through 2018
OLED TV shipment delays stall OLED material growth
BMW updates navigation via mobile radio connection
- USB 5V 2.5A Output, 42V Input Synchronous Buck with Cable Drop Compensation
- Measurement applications across multiple test platforms
- Supplying DC input power to string inverters
- Supplying DC input power for HEV testing
InterviewHeartbleed challenges the Internet of Thing
The Heartbleed security bug is a key example of the fundamental security challenge for the Internet of Things says Green Hills Software as it launches a new security group.
Filter WizardCheck out the Filter Wizard Series of articles by Filter Guru Kendall Castor-Perry which provide invaluable practical Analog Design guidelines.
Linear video channel
READER OFFERRead more
This month, Arrow Electronics is giving away ten XMC1200 lighting application kits, worth 100 Euros each, for EETimes Europe's readers to win.
Each kit combines Infineon’s brightness and colour control XMC1200 CPU board to drive flicker free LED dimming and colour changing, together with a colour LED card and a white LED card.
December 15, 2011 | Texas instruments | 222901974
Unique Ser/Des technology supports encrypted video and audio content with full duplex bi-directional control channel over a single wire interface.