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TAS5342DDV6EVM 产品设计参考手册 - TI（德州仪器）
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TAS5342DDV6EVM数据手册
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User's Guide
SLAU239 – February 2008
TAS5342DDV6EVM
This user’s guide describes the operation of the evaluation module for the TAS5342 Digital Amplifier
Power Output Stage using the TAS5508B Digital Audio PWM Processor from Texas Instruments. The
user’s guide also provides measurement data and design information like schematic, bill of materials, and
PCB layout.
Contents
1 Overview ...................................................................................................................... 3
1.1 TAS5342DDV6EVM Features..................................................................................... 4
1.2 PCB Key Map ....................................................................................................... 6
2 Quick Setup Guide........................................................................................................... 6
2.1 Electrostatic Discharge Warning .................................................................................. 6
2.2 Unpacking the EVM ................................................................................................ 7
2.3 Power Supply Setup ................................................................................................ 7
2.4 Speaker Connection ................................................................................................ 7
2.5 GUI Software Installation .......................................................................................... 7
3 Protection ..................................................................................................................... 8
3.1 Short-Circuit Protection and Fault-Reporting Circuitry ......................................................... 8
3.2 Fault Reporting ...................................................................................................... 8
4 TAS5342DDV6EVM Performance ......................................................................................... 9
4.1 THD+N vs Power (BTL –4 Ω ) ................................................................................... 11
4.2 THD+N vs Power (BTL –6 Ω ) ................................................................................... 12
4.3 THD+N vs Power (BTL –8 Ω ) ................................................................................... 12
4.4 THD+N vs Power (PBTL –2 Ω ) .................................................................................. 13
4.5 THD+N vs Power (PBTL –3 Ω ) .................................................................................. 13
4.6 THD+N vs Frequency (BTL –4 Ω ) .............................................................................. 14
4.7 THD+N vs Frequency (BTL – 6 Ω ) .............................................................................. 14
4.8 THD+N vs Frequency (BTL –8 Ω ) .............................................................................. 15
4.9 THD+N vs Frequency (PBTL –2 Ω ) ............................................................................. 15
4.10 THD+N vs Frequency (PBTL –3 Ω ) ............................................................................. 16
4.11 FFT Spectrum with –60-dBFS Tone (BTL) .................................................................... 16
4.12 FFT Spectrum With –60-dBFS Tone (PBTL) .................................................................. 17
4.13 Idle Noise FFT Spectrum (BTL) ................................................................................. 17
4.14 Idle Noise FFT Spectrum (PBTL) ............................................................................... 18
4.15 Channel Separation ............................................................................................... 18
4.16 Frequency Response (BTL)...................................................................................... 19
4.17 Frequency Response (PBTL) .................................................................................... 19
4.18 High-Current Protection (BTL) ................................................................................... 20
4.19 High-Current Protection (PBTL) ................................................................................. 20
4.20 Pop/Click (BTL) .................................................................................................... 21
4.21 Pop/Click (PBTL) .................................................................................................. 21
4.22 Output Stage Efficiency .......................................................................................... 22
4.23 Subwoofer Lineout THD vs Output Voltage ................................................................... 22
4.24 Subwoofer Lineout THD vs Frequency ......................................................................... 23
4.25 Subwoofer Lineout Frequency Response ...................................................................... 23
5 Related Documentation from Texas Instruments ...................................................................... 24
PurePath Digital, Equibit are trademarks of Texas Instruments.
Windows is a trademark of Microsoft Corporation.
SLAU239 – February 2008 TAS5342DDV6EVM 1
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