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Texas Instruments APA100 manual EVM Overview, Chapter, Page, Topic

Models: APA100

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Chapter 1

Chapter 1

EVM Overview

This reference design demonstrates how to make the TPA2001D1 and the 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 18-V to 29.5-V power supply is applied across the power supply banana plugs J3 and J4. Apply 18 V to 29.5 V to J3 and 0 V (ground) to J4. A simple zener diode and NPN transistor circuit is used to create the 3-V supply for the TPA2001D1 and TLV2464A; therefore, the user only needs to apply the single-supply voltage.

The analog single-ended input is received through the phono jack, J5. The user should connect the load across the differential output banana jacks, J1 and J2.

Topic		Page

1.1	Features	. . 1-2
1.2	Power Requirements	. . 1-2
1.3	EVM Basic Function/Block Diagram	. . 1-3

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Texas Instruments APA100 manual EVM Overview, Chapter, Page, Topic

Contents

August Audio Power AmplifiersUser’s Guide APA100Products IMPORTANT NOTICEApplications 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 Page1.2 Power Requirements 1.1 Features1.2.1Supply Voltage EVM Basic Function/Block Diagram 1.3 EVM Basic Function/Block DiagramEVM Overview TLV2464 EVM Basic Function/Block DiagramFeedback IntegratorPage PCB DesignSchematic Chapter2.1.1Split Ground Plane 2.1 PCB Layout2.1.3Analog Section Layout 2.1.2H-BridgeLayoutFigure 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 LayoutTable 2−1. Parts List 2.2 Bill of MaterialsBill of Materials Schematic 2.3 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 PowerEfficiency 5.3 EfficiencyMeasured Results 5.5 Signal-to-NoiseRatio SNR 5.4 Gain and Phase ResponseGain and Phase Response Supply Ripple Rejection 5.6 Supply Ripple RejectionMeasured Results