ON Semiconductor, LLC
Phoenix, AZ 85008
Jan 09, 2009 Able to deliver 1.35 W of output power to 8 ohm speaker or 1.1 W to 4 ohm speaker, NCP2991 Class AB audio amp has THD of 0.015% and features -103 dB power supply rejection ratio that eliminates any noise generated by fluctuation of battery supply voltage. It is also resistive to TDMA noise that occurs during GSM transmission and exhibits zero pop-and-click noise at start-up and shut-down. Selectable start-up between 15 and 20 msec enables use of shut-down mode, which consumes 20 nA.

STMicroelectronics
GENEVA   Switzerland
Dec 15, 2008 Consolidating dual SPST analog switch achieving -80 dB isolation and 1.6 W class-D amplifier into 3 x 3 mm package, TS4961T simplifies board design in cell phones and media players. It operates within 2.4-4.3 V supply range, consumes 2 mA operating current at 3 V, and features 10 nA shutdown mode to promote battery life. Filterless amplifier, which drives up to 1.6 W into 4 Ohm load or 0.95 W into 8 Ohm load, achieves less than 1% THD and power supply rejection up to -63 dB at 217 Hz.

International Rectifier Corp.
El Segundo, CA 90245
Nov 10, 2008 With power range from 25-500 W, IRAUDAMP7 reference design offers scalability on single-layer PCB for Class D audio amplifiers above 25 W per channel. Two-channel, 120 W, half-bridge design of IRAUDAMP7S provides 91% efficiency at 120 W in Class D stage, 8 ohms, and THD+N of 0.005% at 1 kHz, 60 W, 8 ohms. While IRAUDAMP7D features IRS2092 protected digital audio driver IC in DIP16 package together with through-hole components, IRAUDAMP7S features IRS2092S in SOIC package with SMT components.

National Semiconductor Corp.
Santa Clara, CA 95051-0695
Oct 30, 2008 Supplied in 14-pin TSSOP and AEC-Q100 Grade 2-qualified for operation from -40 and +105°C, LM48100Q Boomer® amplifies warning tones in automobile driver warning systems. Mono 1.3 W amplifier integrates output short circuit and thermal overload protection as well as open drain FAULT output that indicates when fault has occurred. Dual audio inputs can be mixed and multiplexed to device output, with each path having independent, 32-step, I²C-compatible volume control.

STMicroelectronics
GENEVA   Switzerland
Oct 29, 2008 Supplying direct connection to digital audio player, TDA7801 eliminates need for signal conversion and subsequently promotes sound quality and noise immunity as well as system reliability. It offers SNR from 90-105 dB and delivers intrinsically pop-free operation without clicks or noises during car battery transitions. In addition to incorporating embedded diagnostics, design reduces number of active and passive components to simplify system architectures.

Texas Instruments, Inc. (TI)
Dallas, TX 75243-4136
Aug 22, 2008 With 2 stereo single-ended inputs that can be configured as single stereo differential input, Model TPA2050D4 audio subsystem includes stereo Class-D amplifier that provides 1.4 W per channel output drive capability into 8 Ohm loudspeakers with 90% efficiency to extend battery life in portable applications. It also features low-noise stereo DirectPath(TM) headphone amplifier that eliminates need for dc-blocking output capacitors to reduce component count.

Leadis Technology, Inc.
Sunnyvale, CA 94085
Jul 22, 2008 Suited for power-sensitive applications with headphone output, LDS9505 and LDS9504 incorporate Gmax(TM) technology for Class-G amplification and offer 5.5 mW/channel power dissipation to promote battery run-time. Adaptive Rail Amplifier and other technologies eliminate pop and click as well as zipper-noise concerns. Requiring 4 mW quiescent power, standalone products are capable of up to 63 mW in single-ended stereo and 106 mW in mono BTL output, with SNR of 102 dB.

Texas Instruments, Inc. (TI)
Dallas, TX 75243-4136
Jul 18, 2008 Providing 1.7 W/channel output drive across 8 W load, TPA2016D2 features programmable dynamic range compression that automatically adjusts audio to desired loudness range while protecting speaker and preventing clipping and distortion. Users can select gains from -28 to +30 dB as well as program attack/hold/release times, compression ratios, and noise threshold values. Suited for wireless handsets, notebook PCs, and portable DVD players, it comes in 2.2 x 2.2 mm NanoFree(TM) WCSP package.

Texas Instruments, Inc. (TI)
Dallas, TX 75243-4136
Jul 10, 2008 Available in 24-TSSOP package, Models TPA3121D2 and TPA3124D2 are 15 W, stereo analog-input Class-D amplifiers that feature single-ended architecture to save board area by eliminating 2 LC output filters. Along with single-ended stereo support, outputs can be configured in BTL mode to support 30 W mono applications, such as wireless speakers or subwoofers. Units are protected against over/under-voltage, over-temperature, and short circuit. Model TPA3124D2 features mute time of 30 µsec.

ClearOne Communications, Inc.
Salt Lake City, UT 84119
Jun 24, 2008 Suited for conferencing, rich media presentations, and sound reinforcement applications, Converge(TM) PA 2250 and PA 4160 feature rugged design, low noise fans, and front panel indicators for signal, active, and protection. Model PA 2250 is 2-channel amplifier that provides 250 W/channel, while PA 4160 is 4-channel amplifier providing 160 W/channel. Two rack-units tall, amplifiers can connect to other professional audio systems, such as Converge Pro and Converge SR 1212.

Maxim Integrated Products
Sunnyvale, CA 94086
May 19, 2008 Suited for all-in-one and notebook PCs, LCD/PDP/CRT monitors and TVs, and PC speakers, MAX9736A/B amplifiers feature 67 dB PSRR, and integrated spread-spectrum, filterless modulator that eliminates need for bulky LC filters. With pin-selectable stereo/mono mode, they can drive 4 W stereo or 2 W mono load with supply voltages up to 12 V. Model MAX9736A delivers 2 x 15 W into 8 W loads, or 1 x 30 W into 4 W load, while model MAX9736B delivers 2 x 6 W into 8 W loads or 1 x 12 W into 4 W load.

Texas Instruments, Inc. (TI)
Dallas, TX 75243-4136
May 13, 2008 Featuring integrated boost converter, Model TPA2014D1 provides up to 1.5 W across 8 W load, ensuring that volume is maintained even when battery discharges to its minimum voltage. Monolithic, filter-free Class-D audio amplifier features voltage supply range of 2.5-5.5 V and PSRR of 91 dB, enabling direct connection to battery without degradation of sound quality. Available in 4 x 4 mm QFN and 2.3 x 2.3 mm WCSP package, it has integrated phase-locked loop for clock synchronization.

Texas Instruments, Inc. (TI)
Dallas, TX 75243-4136
Apr 14, 2008 Supporting multiple output configurations, 20 W Class-D Model TAS5601 includes PWM interface to video or audio processor. Unit is more than 90% efficient and requires only 3.3 V and 10-26 V rail. Operation up to +26 V allows LCD-TV manufacturers to power device off existing +24 backlight rail, eliminating need for dedicated audio power rail. In addition, TAS5601 includes over-voltage, under-voltage, over-temperature, and short circuit protection.

Power Analog Microelectronics
Shanghai   China
Mar 11, 2008 Employing filter-free architecture, Model PAM8303D can deliver 3 W into 4 W load, and provide efficiency higher than 90% with 8 W load. Only one input coupling capacitor per channel is needed in external circuit. Available in 9-ball WCSP, MSOP-8, and DFN 3 x 3 8-pin packages, amplifier is RoHS-compliant and suited for cell phones, MP3/MP4 players, PMP, GPS navigators, and portable game machines.

Texas Instruments, Inc. (TI)
Dallas, TX 75243-4136
Mar 03, 2008 Model TAS5706 is digital-input, 20 W stereo Class-D speaker amplifier with on-chip audio processing capabilities including dynamic range compression, dedicated subwoofer channel for 2.1 applications, and speaker equalization. It provides flexible output configurations that allow manufacturers to use single platform across multiple products. Stereo, quad, and 2.1 output configurations are supported along with PWM headphone and subwoofer outputs.

Texas Instruments, Inc. (TI)
Dallas, TX 75243-4136
Feb 19, 2008 Available in 4 x 4 mm package, Model DRV601 2VRMS DirectPath(TM) integrates charge pump to allow complete audio output signal chain to run from single 3.3 V power supply. It features 2VRMS/channel output voltage into 600 W at 3.3 V, independent right and left channel shutdown control, greater than 105 dB dynamic range, short-circuit and thermal protection, and pop reduction circuitry. It is suited for television peripherals such as set-top boxes, HDTV receivers, and DVD players.

STMicroelectronics
GENEVA   Switzerland
Feb 15, 2008 Supplied in 2.1 x 2.1 x 0.6 mm flip-chip package, TS4601 offers typical power-supply rejection ratio of -107 dB that prevents handset battery noise from reaching audio output. User functions and configuration control are managed via built-in I²C interface, and sub-2 µA stand-by mode promotes power conservation. Output is stable under all load conditions, allowing glitch-free operation whether user is listening via headset or external hi-fi via phone output.

Maxim Integrated Products
Sunnyvale, CA 94086
Jan 29, 2008 Intended for applications where speakers must be positioned close together, MAX9775 integrates mono, DirectDrive(TM), 80 mW receiver amplifier; stereo, DirectDrive, 80 mW headphone amplifier; and high-efficiency, Class D, stereo 1.5 W audio power amplifier, while MAX9776 employs mono, 80 mW receiver amplifier; stereo, DirectDrive 80 mW headphone amplifier; and mono Class D amplifier. Spread-spectrum modulation flattens wideband spectral components, minimizing EMI emissions.

STMicroelectronics
GENEVA   Switzerland
Jan 18, 2008 Available in PSO36 package, Model STA510F Digital Power Amplifier is capable of driving up to 100 W per channel of audio into stereo 8 W loads. Device can also drive 4 x 50 W into 4 W, or up to 200 W in mono-aural configuration. Single-chip audio solution preserves full audio quality of PWM input signal, and eliminates need for external control of power-supply turn-off sequence.

FSR Metal Products
West Paterson, NJ 07424
Dec 31, 2007 Accepting balanced or unbalanced input and outputs, Models SADA-4 and SADA-6 can be configured for stereo or mono with flip of switch. Individually buffered and amplified outputs are short circuit protected and configurable for multiple output arrangements. Both models are suitable companions to video distribution amps.