Amplifier reference design targets Class-D products

Austin, Texas — Cirrus Logic Inc. launched a quad amplifier and a 2.1-channel Class-D amplifier reference design today for digital TVs and home theater receivers.

With the introduction of its CS44130 quad amplifier, Cirrus is able to provide a complete solution for audio conversion and digital audio amplification, said Jason Rhode, vice president and general manager, Cirrus Logic. “The CS44130 enables Cirrus Logic to provide chips for the entire audio signal chain, including everything between the analog or digital inputs and the speaker outputs,” he said.

Central to the Class-D reference design is Cirrus' CS44600 digital amplifier controller and the new CS44130 quad power stage IC. Offered in a thermally enhanced QFN package (9 x 9 mm), the CS44130 is said to eliminate the need for an expensive, bulky heat sink. The reference design highlights this simplification and showcases a high-power stereo amplifier in less than three square inches of printed-circuit board space, making it suited for consumer electronic products that demand high quality audio within small product designs, such as digital televisions, home theater systems, shelf systems, desktop speakers, PC sound cards and networked audio systems, Rhode said.

The CS44130 quad amplifier provides up to 60 watts of power and is thermally and electrically self protected. The outputs can be configured as four half-bridge channels, two full-bridge channels or one parallel full-bridge channel.

The CS44130 can achieve system level dynamic range greater than 105 dB, along with excellent distortion performance, Rhode said. The power stage's input logic accepts 2.5 volt, 3.3 V as well as 5 V control signals, enabling it to also work with other integrated pulse-width modulation (PWM) modulators in digital TV and audio/video decoder system processors, he said.

The CS44130 quad amplifier is sampling now in a 48-pin QFN package. Volume production is slated for June. Pricing for the CS44130 starts at $2.78 in 10,000-piece quantities. Click here for the reference design.

Cirrus Logic Inc. , 1-800-625-4084,

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