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Texas Instruments APA100 manual 1. Quick Start Module Map

Models: APA100

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3.1 Quick Start

Quick Start

3.1 Quick Start

Follow these steps to use the APA100 EVM.

APA100 audio input connection can be made via a phono jack (J1), or by sol- dering to its pins. The power supply and outputs can be connected with banana connectors or wires via screw terminals. Figure 3−1 shows numbered callouts for selected steps.

Figure 3−1. Quick Start Module Map

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Power Supply

1)Ensure that all external power sources are set to off.

2)Connect an external regulated power supply, set from 18 V to 29.5 V, to the module A+ (J3) and GND (J4) banana plugs, taking care to observe marked polarity.

Inputs and Outputs

3)Ensure that the signal source level is set to minimum.

4)Connect the audio source to the input phono connector, J1. The inside of the phono connector is the audio input, and the outside of the phono con- nector is ground. Ensure that a single−ended input signal is inserted (NOT differential or balanced), because the outside of the phono connector is tied to ground.

5)Connect a 4− Ω or higher impedance speaker to the module OUT+ (J2) and OUT− (J1) connectors.

3-2

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Texas Instruments APA100 manual 1. Quick Start Module Map

Contents

Audio Power Amplifiers User’s GuideAPA100 AugustApplications IMPORTANT NOTICEProducts How to Use This Manual Read This FirstAbout This Manual Information About Cautions and WarningsRelated Documentation From Texas Instruments FCC WarningData Sheets This is an example of a warning statementContents Figures TablesEVM Overview ChapterPage Topic1.2.1Supply Voltage 1.1 Features1.2 Power Requirements EVM Overview 1.3 EVM Basic Function/Block DiagramEVM Basic Function/Block Diagram EVM Basic Function/Block Diagram FeedbackIntegrator TLV2464PCB Design SchematicChapter Page2.1 PCB Layout 2.1.1Split Ground PlaneFigure 2−2. APA100 Split Plane Bottom Layout 2.1.2H-BridgeLayout2.1.3Analog Section Layout 2.1.4PCB Layers Figure 2−3. Top Copper and SilkscreenFigure 2−4. Bottom Copper and Silkscreen Figure 2−5. Drill DrawingPCB Layout PCB DesignBill of Materials 2.2 Bill of MaterialsTable 2−1. Parts List PCB Design 2.3 SchematicSchematic Page EVM Operation ChapterPage Topic3.1 Quick Start Figure 3−1. Quick Start Module Map3.2 Power−Up/Down Sequence 3.3 Reset Button/Mute3.4 Error Signals Table 3−1. TAS5111 Error Decoding3.5 Changing the Gain Technical Information ChapterPage Topic4.1 Feedback System Design Figure 4−1. APA100 Block DiagramPhase 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 Figure 4−7. TPA2001D1 Block Diagram TPA2001D1 Class-DModulatorCh1: 3V/Div Ch2: 3V/Div Ch3: 3V/Div Ch4: 1V/Div t − Time −4.4 TLV2464A Gain Setting and Feedback 4.3 TAS5111 H-Bridge4.5 LC Filter Figure 4−9. APA100 Output Filter4.6 Thermal Table 4−1. TAS5111 Thermal TableAs 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 Measured Results ChapterPage Topic5.1 Total Harmonic Distortion + Noise Total Harmonic Distortion + NoiseTotal Harmonic Distortion + Noise Measured Results5.2 Output Power Output PowerMeasured Results 5.3 EfficiencyEfficiency Gain and Phase Response 5.4 Gain and Phase Response5.5 Signal-to-NoiseRatio SNR Measured Results 5.6 Supply Ripple RejectionSupply Ripple Rejection