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Audio amplifiers cut power use

Posted: 04 Jul 2012 ?? ?Print Version ?Bookmark and Share

Keywords:stereo amplifier? analog-input?

Texas Instruments Inc. has announced the availability of the TPA3116D2, TPA3118D2 and TPA3130D2 analog-input class-D stereo amplifiers for use in soundbars, after-market automotive solutions, portable audio docks, and LCD TVs.

The devices claim the industry's highest programmable switching rate and widest power supply range, and are said to enable high quality, highly efficient audio output. The devices are pin-to-pin and software compatible and can support a single-layer PCB, enabling cost savings by allowing designers to reuse a single layout for multiple designs.

The devices operate at the wide supply range of 4.5V to 26V, enabling simultaneous operation of line power and battery power on the same board for longer battery life in soundbars and portable audio docks. They feature thermally efficient FETs that allow 30W x 2 operation without the need for a heat sink, or 50W x 2 with a heat sink (TPA3116D2 only).

They offer programmable switching rates of 400kHz to 1.2MHz for inductor filter-free operation and interference avoidance for clear audio with no distortions. Closed-loop design provides excellent power supply rejection ratio (PSRR) and slower edge rates for waveform switching to improve EMI performance.

Also, they feature 120? Rds(on) at 30W x 2, decreasing resistance during operation.

An evaluation module, priced at $149 each, and SPICE model are available for the TPA3116D2, TPA3118D2 and TPA3130D2, allowing designers to easily evaluate system-level performance and quickly integrate the amplifiers into product designs.

The TPA3116D2, TPA3118D2 and TPA3130D2 are available now in a 10 x 6mm 32-pin HTSSOP package. They are priced at $1.80 for the TPA3116D2, $1.65 for the TPA3118D2, and $1.30 for the TPA3130D2, each in quantities of 1,000.

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