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 3Ω 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
TAS5624 Power Supply Voltage
TAS5622 Power Supply Voltage
Number of Channels
Values
12 - 38 Vdc
12 - 34 Vdc
2 x BTL or 1 x PBTL
3-8 Ohm
Load Impedance BTL
Load Impedance PBTL
TAS5624 Output power BTL
TAS5624 Output power PBTL
TAS5622 Output power BTL
TAS5622 Output power PBTL
Dynamic Range (DNR)
PWM Processor
1.5-4 Ohm
200W / 3Ohm / 10%THD+N
400W / 1.5Ohm / 10%THD+N
165W / 3Ohm / 10%THD+N
325W / 1.5Ohm / 10%THD+N
>105 dB
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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