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Texas Instruments APA100 Read This First, About This Manual, How to Use This Manual, Preface

Models: APA100

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Preface

Preface

Read This First

About This Manual

This user’s guide describes the characteristics, operation, and the use of the APA100 reference design board. It covers all pertinent areas involved to properly use this reference design board along with the devices that it supports. The physical PCB layout, schematic diagram, and circuit descriptions are included.

This reference design demonstrates how to make the TPA2001D1 and TAS5111 into a 100-W class-D amplifier. The user’s guide discusses how the TPA2001D1 is used as an analog input class-D modulator. The analog modulator is input to the TAS5111, which is an H−bridge that effectively extends the supply range from the TPA2001D1’s 3-V rails to 29.5 V with the TAS5111. The user’s guide also goes into detail on the external feedback using the TLV2464A quad operational amplifier to add power supply rejection. The user’s guide shows the measured audio results including: total harmonic distortion plus noise (THD+N) versus frequency, THD+N versus output power, signal-to-noise ratio (SNR), output power versus supply voltage, output power versus load, and supply rejection ratio versus frequency.

How to Use This Manual

-Chapter 1 — EVM Overview

-Chapter 2 — PCB Design

-Chapter 3 — EVM Operation

-Chapter 4 — Technical Information

-Chapter 5 — Measured Results

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 that could potentially damage your software or equipment.

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Texas Instruments APA100 manual Read This First, About This Manual, How to Use This Manual, Preface

Contents

August Audio Power AmplifiersUser’s Guide APA100IMPORTANT NOTICE ProductsApplications Information About Cautions and Warnings How to Use This ManualRead This First About This ManualThis is an example of a warning statement Related Documentation From Texas InstrumentsFCC Warning Data SheetsContents Tables FiguresTopic EVM OverviewChapter Page1.1 Features 1.2 Power Requirements1.2.1Supply Voltage 1.3 EVM Basic Function/Block Diagram EVM Basic Function/Block DiagramEVM Overview TLV2464 EVM Basic Function/Block DiagramFeedback IntegratorPage PCB DesignSchematic Chapter2.1.1Split Ground Plane 2.1 PCB Layout2.1.2H-BridgeLayout 2.1.3Analog Section LayoutFigure 2−2. APA100 Split Plane Bottom Layout Figure 2−3. Top Copper and Silkscreen 2.1.4PCB LayersPCB Design Figure 2−4. Bottom Copper and SilkscreenFigure 2−5. Drill Drawing PCB Layout2.2 Bill of Materials Table 2−1. Parts ListBill of Materials 2.3 Schematic SchematicPCB Design Page Topic EVM OperationChapter PageFigure 3−1. Quick Start Module Map 3.1 Quick StartTable 3−1. TAS5111 Error Decoding 3.2 Power−Up/Down Sequence3.3 Reset Button/Mute 3.4 Error Signals3.5 Changing the Gain Topic Technical InformationChapter PageFigure 4−1. APA100 Block Diagram 4.1 Feedback System DesignPhase Margin + 180 Phase at Fc Figure 4−4. APA100 Integrator Design Closed−loop gain + 1.5 0 C10 V1 1 0 4.2 TPA2001D1 Class-DModulator t − Time − Figure 4−7. TPA2001D1 Block DiagramTPA2001D1 Class-DModulator Ch1: 3V/Div Ch2: 3V/Div Ch3: 3V/Div Ch4: 1V/Div4.3 TAS5111 H-Bridge 4.4 TLV2464A Gain Setting and FeedbackFigure 4−9. APA100 Output Filter 4.5 LC FilterTable 4−1. TAS5111 Thermal Table 4.6 ThermalAs an indication of the importance of keeping the thermal grease layer thin, if the thermal grease layer increases to 0.002 inch thick, the required heatsink thermal resistance changes to 2.4C/W Topic Measured ResultsChapter PageTotal Harmonic Distortion + Noise 5.1 Total Harmonic Distortion + NoiseMeasured Results Total Harmonic Distortion + NoiseOutput Power 5.2 Output Power5.3 Efficiency EfficiencyMeasured Results 5.4 Gain and Phase Response 5.5 Signal-to-NoiseRatio SNRGain and Phase Response 5.6 Supply Ripple Rejection Supply Ripple RejectionMeasured Results