Introduction

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1

Introduction

The TAS5622-TAS5624DDVEVM PurePath™ EVM demonstrates the current version of TAS5622DDV or

TAS5624DDV integrated circuit power stage with TAS5538DGG from Texas Instruments (TI).

The TAS5622 and TAS5624 are high-performance, integrated Stereo Feedback Digital Amplifier Power

Stages designed to drive 3

Ω speakers at up to 200W per channel for TAS5624DDV and 165W per

channel for TAS5622DDV. They require only a passive demodulation filter to deliver efficient high quality

audio amplification.

TAS5538DGG is a high performance 32 bit (24 bit input) multi channel PurePath™ Digital Pulse Width

Modulator (PWM) with fully symmetrical AD modulation scheme. The device also has Digital Audio

Processing (DAP) that provides 48 bit signal processing, advanced performance and a high level of

system integration.

This EVM can be configured as 2 BTL channels for stereo evaluation or 1 PBTL (parallel BTL) channel for

subwoofer evaluation. Together with a TI Input-USB Board 3, it provides a complete stereo digital audio

amplifier system which includes digital input (S/PDIF), analog inputs, interface to PC and DAP features

like digital volume control, input and output mixers, automute, tone controls, loudness, EQ filters and

dynamic range compression (DRC). There are configuration options for power stage failure protection.

NOTE: TAS5622-TAS5624DDVEVM IS SHIPPED WITH THE CURRENT VERSION OF TAS5624

INSTALLED. TO EVALUATE THE CURRENT VERSION OF TAS5622 PLEASE VISIT THE

PRODUCT FOLDER AT www.ti.com AND REQUEST A FREE SAMPLE, AND REPLACE

TAS5624 WITH TAS5622.

Table 1. TAS5622-TAS5624DDVEVM Specification

Key Parameters

Values

TAS5624 Power Supply Voltage

12 - 38 Vdc

TAS5622 Power Supply Voltage

12 - 34 Vdc

Number of Channels

2 x BTL or 1 x PBTL

Load Impedance BTL

3-8 Ohm

Load Impedance PBTL

1.5-4 Ohm

TAS5624 Output power BTL

200W / 3Ohm / 10%THD+N

TAS5624 Output power PBTL

400W / 1.5Ohm / 10%THD+N

TAS5622 Output power BTL

165W / 3Ohm / 10%THD+N

TAS5622 Output power PBTL

325W / 1.5Ohm / 10%THD+N

Dynamic Range (DNR)

>105 dB

PWM Processor

TAS5538DGG

Output Stage

TAS5624DDV or TAS5622DDV

NOTE:

The heatsink in TAS5622-TAS5624DDVEVM is designed to comply with time requirements

of the “Amplifier Rule”, US Federal Trade Commission 16 CFR 432, when the EVM is

operated at power levels specified above. If continuous operation at specified output power

is required it is necessary to provide forced air flow through the heatsink.

(The FTC regulation specifies operation in 25°C ambient temperature for one hour at 1/8

specified output power (25.0W per channel for TAS5624DDVEVM, 20.63W per channel for

TAS5622DDVEVM) and then for 5 minutes at specified output power (200W per channel for

TAS5624DDVEVM, 165W per channel for TAS5622DDVEVM). Then distortion vs. output

power can be measured. TAS5622-TAS5624DDVEVM provides specified output power for

several minutes or more without thermal shutdown. THD is not specified for this test but is

typically near 10%.)

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TAS5622-TAS5624DDVEVM

SLAU376 – May 2012

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