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Texas Instruments TPA2008D2 manual

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Table of contents for the manual

  • Page 1

                 July 2003 Mixed-Signal Products User ’ s Guide SLOU1 16[...]

  • Page 2

    IMPORT ANT NOTICE T exas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orde[...]

  • Page 3

    EVM IMPORT ANT NOTICE T exas Instruments (TI) provides the enclosed product(s) under the following conditions: This evaluation kit being sold by TI is intended for use for ENGINEERING DEVELOPMENT OR EV ALUA TION PURPOSES ONL Y and is not considered by TI to be fit for commercial use. As such, the goods being provided may not be complete in terms of[...]

  • Page 4

    EVM W ARNINGS AND RESTRICTIONS It is important to operate this EVM within the supply voltage range specified in the user ’ s guide. The supply voltage range should be 4.5 V to 5.5 V . Exceeding the specified input range may cause unexpected operation and/or irreversible damage to the EVM. If there are questions concerning the input range, please [...]

  • Page 5

    iii Read This First Preface How to Use This Manual This document contains the following chapters: - Chapter 1 — Introduction - Chapter 2 — Operation - Chapter 3 — Reference Information About Cautions and Warnings This book may contain cautions and warnings. This is an example of a caution statement. A caution statement describes a situation t[...]

  • Page 6

    Running Title — Attribute Reference iv Related Documentation From T exas Instruments J TI Plug-N-Play Audio Amplifier Evaluation Platform (literature number SLOU01 1) provides detailed information on the evaluation platform and its use with TI audio evaluation modules. J TP A2008D2 3-W STEREO CLASS-D AUDIO POWER AMPLIFIER (literature number SLOS4[...]

  • Page 7

    Running Title — Attribute Reference v Chapter Title — Attribute Reference Contents 1 Introduction 1-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.1 Feature Highlights 1-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .[...]

  • Page 8

    Running Title — Attribute Reference vi Figures 1 – 1 The TI TP A2008D2 Audio Amplifier EVM Without Output Filter — T op View 1-3 . . . . . . . . . . . 1 – 2 The TI TP A2008D2 Audio Amplifier EVM Without Output Filter — Bottom View 1-3 . . . . . . . . 2 – 1 Quick Start Platform Map 2-2 . . . . . . . . . . . . . . . . . . . . . . . . . . [...]

  • Page 9

    1-1 Introduction This chapter provides an overview of the T exas Instruments (TI) TP A2008D2 stereo filter-free class-D audio amplifier evaluation module (SLOP392). It includes a list of EVM features, a brief illustrated description of the module, and a list of EVM specifications. T opic Page 1.1 Feature Highlights 1–2 . . . . . . . . . . . . . .[...]

  • Page 10

    Feature Highlights 1-2 Introduction 1.1 Feature Highlights The TI TP A2008D2 audio amplifier evaluation module and the TI plug-n-play audio amplifier evaluation platform include the following features: - TP A2008D2 Stereo 3-W Filter-Free Class-D Audio Power Amplifier Evaluation Module J Class-D without output filter J Internal depop circuitry to mi[...]

  • Page 11

    Description 1-3 Introduction 1.2 Description The TP A2008D2 filter-free class-D stereo audio power amplifier evaluation module is a complete, 3-W per channel class-D stereo audio power amplifier that can operate without an output filter . It consists of the TI TP A2008D2 class-D stereo 3-W audio power amplifier IC along with a small number of other[...]

  • Page 12

    TP A2008D2 EVM Specifications 1-4 Introduction The platform has room for a single TP A2008D2 evaluation module and is a convenient vehicle for demonstrating TI ’ s audio power amplifier and related evaluation modules. The EVMs simply plug into the platform, which automatically provides power to the modules, interconnects them correctly , and conn[...]

  • Page 13

    2-1 Operation Operation The steps in this chapter can be followed to quickly prepare the TP A2008D2 stereo filter-free class-D audio amplifier EVM for use. Using the TP A2008D2 with the TI plug-n-play audio amplifier evaluation platform is a quick and easy way to connect power , signal and control inputs, and signal outputs to the EVM using standar[...]

  • Page 14

    Precautions 2-2 Operation 2.1 Precautions Power Supply Input Polarity and Maximum V oltage Always ensure that the polarity and voltage of the external power connected to V CC power input connector J1, J2, and/or V DD power input connector J6 are correct. Overvoltage or reverse-polarity power applied to these terminals can open onboard soldered-in f[...]

  • Page 15

    Quick Start List for Platform 2-3 Operation 2.2 Quick Start List for Platform Follow these steps when using the TP A2008D2 EVM with the TI plug-n-play audio amplifier evaluation platform (see the platform user ’ s guide, literature number SLOU01 1, for additional details). Numbered callouts for selected steps are shown in Figure 2 – 2, and deta[...]

  • Page 16

    Quick Start List for Stand-Alone 2-4 Operation - Evaluation Module Preparations 1 1) Use potentiometer R3 to set the volume. T urning R3 in the clockwise direction will increase the volume. See T able 3 – 1 for voltage levels on the VOLUME pin and corresponding gain settings. 12) If using an external DAC, adjust R3 to the center position by placi[...]

  • Page 17

    Quick Start List for Stand-Alone 2-5 Operation Figure 2 – 3. Quick Start for Stand-Alone Audio Input (Right) Audio Input (Left) External Shut Down Control (active low) Right Left 5 V 7 5 5 4 4 2 8 6 - Power supply 1) Ensure that all external power sources are set to OFF . 2) Connect an external regulated power supply set to 5 V to the module VDD [...]

  • Page 18

    Quick Start List for Stand-Alone 2-6 Operation The EVM should begin operation. 10) Adjust the signal source level and potentiometer R3 as needed.[...]

  • Page 19

    Power Requirements 2-7 Operation 2.4 Power Requirements The TP A2008D2 audio power amplifier evaluation module can operate from any voltage between approximately 4.5 V and 5.5 V ; however , the TP A2008D2 amplifier IC on the module is characterized for operation at 5 V . For best performance (highest output power with lowest distortion), the module[...]

  • Page 20

    2-8 Operation[...]

  • Page 21

    3-1 Reference Reference This chapter contains the EVM schematic, PCB layers, parts list, and dc volume control table. T opic Page 3.1 TP A2008D2 EVM Schematic 3 – 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.2 TP A2008D2 EVM PCB Layers 3 – 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.3 T[...]

  • Page 22

    TP A2008D2 EVM Schematic 3-2 Reference 3.1 TP A2008D2 EVM Schematic Figure 3 – 1. TP A2008D2 Filter-Free Class-D EVM Schematic Diagram 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 LINN LINP SHUTDOWN PVDD LOUTP PGND PGND LOUTN PVDD COSC ROSC AGND RINN RINP BYP ASS PVDD ROUTP PGND PGND ROUTN PVDD NC VOLUME VDD R2 120 k Ω C6 220 [...]

  • Page 23

    TP A2008D2 EVM PCB Layers 3-3 Reference 3.2 TP A2008D2 EVM PCB Layers Figure 3 – 2 and Figure 3 – 3 depict the TP A2008D2 EVM PCB layers. These drawings are not to scale. Gerber plots can be obtained from any TI sales office. Figure 3 – 2. TP A2008D2 EVM T op Assembly Figure 3 – 3. TP A2008D2 EVM Bottom Assembly[...]

  • Page 24

    TP A2008D2 EVM Parts List 3-4 Reference 3.3 TP A2008D2 EVM Parts List T able 3 – 1. TP A2008D2 EVM Parts List Reference Description Size EVM Qty . Manufacturer/ Part Number V endor/ Part Number C1, C2, C3, C4 Capacitor , 0.1 µ F, ± 5%, X7R, 16 V 603 4 Panasonic ECJ – 1VB1C104K Digi-Key PCC1762CT – ND C5, C7, C8, C9, C10 Capacitor , 1 µ F, [...]

  • Page 25

    DC V olume T able 3-5 Reference 3.4 DC V olume T able T able 3 – 2. DC V olume Control V oltage on VOLUME Pin (V) (Increasing or Fixed Gain) V oltage on VOLUME Pin (V) (Decreasing Gain) Gain of Amplifier (dB) 0 – 0.34 0.31 – 0 – 38 0.34 – 0.42 0.43 – 0.32 – 37 0.43 – 0.52 0.54 – 0.44 – 35 0.53 – 0.63 0.64 – 0.55 – 33 0.64 [...]

  • Page 26

    3-6 Reference[...]