TAS5548DCAR datasheet(95/116 Pages) TI1

95 / 116 page

TAS55x8

DVD Loader

Power Supply

Texas Instruments

Digital Audio Amplifier

MPEG Decoder

Front-Panel Controls

Tuner

B0012-03

TAS5548

www.ti.com

SLES270A – NOVEMBER 2012 – REVISED APRIL 2015

8 Application and Implementation

NOTE

Information in the following applications sections is not part of the TI component

specification, and TI does not warrant its accuracy or completeness. TI’s customers are

responsible for determining suitability of components for their purposes. Customers should

validate and test their design implementation to confirm system functionality.

8.1 Application Information

The TAS5548 is a PWM modulator that can take in up to 10 serial audio channels with 8 fully-differential PWM

outputs, 2 fully-differential headphone PWM outputs, and up to 1 serial audio output. The eight PWM outputs can

support single-ended or bridge-tied load-configured H-bridge power stages with either AD or BD modulation. The

10 inputs can be mixed and mapped internally to different outputs. The TAS5548 is designed to seamlessly

interface with most digital decoders, and supports the DTS-HD specification and Blu-ray HTiB applications.

The TAS5548 also contains a DAP that can implement up to 56 biquads across the 8 channels for sampling

rates up to 96-kHz, and 22 for sampling rates above 96-kHz. Two 4-channel sample rate converters process the

inputs before passing the signals to the DAP. The TAS5548 can be driven by an external crystal or an external

MCLK. Two 3.3-V power supplies are required for a digital and analog supply.

8.2 Typical Applications

Typical applications for the TAS5548 are 6- to 8-channel audio systems such as DVD or AV receivers. Figure 45

shows the basic system diagram of the DVD receiver.

8.2.1 TAS5558 DVD Receiver Application

Figure 45. Typical TAS5548 Application (DVD Receiver)

8.2.1.1 Design Requirements

For this design example, use the parameters listed in Table 83 as the input parameters.

Table 83. Design Parameters

PARAMETER

VALUE

Device control method

Software control through I2C communication for register settings

Digital Audio input

Right-justified, I2S, or left-justified.

Power stage

Audio amplifier with PWM input

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