Renesas has announced a 15+15W digital audio amplifier IC that supports IIS digital input.

The 7x7mm R2J15116FP includes a 24-bit audio DSP and is intended for use in LCD or plasma TVs.

A built-n DSP handles processing for volume control, a parametric equalizer, two-band tone control, loudness, a power limiter, and a dynamic range control.

“This reduces the load on the main DSP and makes it possible to generate a more varied and higher quality sound environment for video applications,” said Renesas.

DSP functions are controlled over an I²C bus.

A feedback circuit stabilise output level when power supply voltage fluctuates “an approach with a proven track record in products employing analogue input”, said the firm.

In addition to the volume control and seven-band parametric equalizer, there is a two-band tone control, a loudness function useful for low- and high-range expansion compensation, a power limiter function that allows setting a maximum output level, and a dynamic range control (DRC) function that lowers the signal amplitude without distortion at high volume levels and raises it at low volume levels. Settings for all these functions can be made flexibly from the MCU via the I2C bus.

Protection includes detection of over current, overheating, and low voltage, as well as a feature that provides warning in advance of overheating and automatically lowers output volume.

No heatsink is needed on the 48pin HTQFP package up to 15W per channel.

More information: www.renesas.com