Texas Instruments TPA0242 - Manuals

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Manual Texas Instruments TPA0242

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Page 3 - Preface; Related Documentation From Texas Instruments; TI is a trademark of Texas Instruments Incorporated.

iii Chapter Title—Attribute Reference Preface Related Documentation From Texas Instruments J TI Plug-N-Play Audio Amplifier Evaluation Platform (literaturenumber SLOU011) provides detailed information on the evaluationplatform and its use with TI audio evaluation modules. J TPA0242 Stereo 2-W Audio ...

Page 5 - Contents; Introduction

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

Page 6 - Figures

Running Title—Attribute Reference vi Figures 1–1 The TI TPA0242 Audio Amplifier Evaluation Module 1-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–1 Quick Start Platform Map 2-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....

Page 7 - This chapter provides an overview of the Texas Instruments (TI; Topic; Chapter 1

1-1 Introduction Introduction This chapter provides an overview of the Texas Instruments (TI  ) TPA0242 audio amplifier evaluation module (SLOP275). It includes a list of EVMfeatures, a brief description of the module illustrated with a pictorial diagram,and a list of EVM specifications. Topic Page...

Page 9 - Description; Figure 1–1. The TI TPA0242 Audio Amplifier Evaluation Module

Description 1-3 Introduction 1.2 Description The TPA0242 stereo 2-W audio power amplifier evaluation module is acomplete, 2-watt per channel stereo audio power amplifier. It consists of theTI TPA0242 stereo 2-W audio power amplifier IC along with a small numberof other parts mounted on a circuit boa...

Page 11 - Quick Start; Table 2–2. Typical TPA0242 EVM Jumper Settings; Chapter 2

2-1 Quick Start Quick Start The steps in this chapter can be followed to quickly prepare the TPA0242 audioamplifier EVM for use. Using the TPA0242 with the TI plug-n-play audioamplifier evaluation platform is a quick and easy way to connect power, signaland control inputs, and signal outputs to the ...

Page 12 - Power Supply Input Polarity and Maximum Voltage; power; Figure 2–1. Quick Start Platform Map

Precautions 2-2 Quick Start 2.1 Precautions Power Supply Input Polarity and Maximum Voltage Always ensure that the polarity and voltage of the external powerconnected to V CC power input connector J1, J2, and/or V DD power input connector J6 are correct. Overvoltage or reverse-polaritypower applied ...

Page 13 - Quick Start List for Platform; Table 2–3. Platform Jumper and Switch Settings for the TPA0242

Quick Start List for Platform 2-3 Quick Start 2.2 Quick Start List for Platform Follow these steps when using the TPA0242 EVM with the TI plug-n-play audioamplifier evaluation platform (see the platform user’s guide, SLOU011, foradditional details). Numbered callouts for selected steps are shown in ...

Page 14 - Evaluation module preparations; Figure 2–2. Module Preparation; OFF. To keep the module amplifier IC in the

Quick Start List for Platform 2-4 Quick Start - Evaluation module preparations Figure 2–2. Module Preparation 11 12 13 14 GND ROUT+ ROUT– SE/BTL S1 SHUTDOWN GND LOUT– LOUT+ C11 C2 C13 VDD GND L IN+ GND L LINE– L HP VDD GND R HP R LINE– GND R IN+ C10 + TPA00242 EVM Board SLOP275 U1 + TEXASINSTRUMENTS...

Page 15 - Quick Start List for Stand-Alone; Figure 2–3. Quick Start Module Map; Power supply

Quick Start List for Stand-Alone 2-5 Quick Start 2.3 Quick Start List for Stand-Alone Follow these steps to use the TPA0242 EVM stand-alone or when connectingit into existing circuits or equipment. Connections to the TPA0242 moduleheader pins can be made via individual sockets, wire-wrapping, or sol...

Page 17 - Details; Chapter 3

3-1 Details Details This chapter provides details on the TPA0242 IC, the evaluation module, andthe steps in the Quick-Start List, additional application information, and a partslist for the TPA0242 evaluation module. Topic Page 3.1 Precautions 3–2 . . . . . . . . . . . . . . . . . . . . . . . . . . ...

Page 18 - Figure 3–1. The TI Plug-N-Play Audio Amplifier Evaluation Platform

Precautions 3-2 Details 3.1 Precautions Power Supply Input Polarity and Maximum Voltage Always ensure that the polarity and voltage of the external powerconnected to V CC power input connector J1, J2, and/or V DD power input connector J6 are correct. Overvoltage or reverse-polaritypower applied to t...

Page 19 - The TPA0242 Audio Power Amplifier Evaluation Module; loads. The amplifier IC can be operated

The TPA0242 Audio Power Amplifier Evaluation Module 3-3 Details 3.2 The TPA0242 Audio Power Amplifier Evaluation Module The TPA0242 audio power amplifier evaluation module is powered by aTPA0242 stereo power amplifier capable of delivering greater than 2 W ofcontinuous power per channel into 3- Ω lo...

Page 20 - Figure 3–3. TPA0242 EVM Schematic Diagram

The TPA0242 Audio Power Amplifier Evaluation Module 3-4 Details Figure 3–3. TPA0242 EVM Schematic Diagram R4 100 k Ω C12 10 µ F GND GND RLINEIN PCB ENABLE SHUTDOWN VOLUME ROUT+ LOUT+ ROUT– LOUT– SE/BTL LIN PC–BEEP BYPASS GND GND RHPIN LLINEIN VDD LHPIN PVDD PVDD CLK RIN 10 9 12 11 6 5 8 7 2 1 4 3 23...

Page 21 - Inputs and Gain; Each channel has two separate signal inputs,

The TPA0242 Audio Power Amplifier Evaluation Module 3-5 Details Figure 3–4. TPA0242 Amplifier IC MUX SE/BTL MUX HP/LINE VOLUME CONTROL PC BEEP L LINE L HP VOLUME PC BEEP L IN R HP R LINE R IN 3.2.2 Inputs and Gain Each channel has two separate signal inputs, line and headphone (HP ), that are automa...

Page 22 - Table 3–1. TPA0242 EVM BTL Volume Settings; Differential Input

The TPA0242 Audio Power Amplifier Evaluation Module 3-6 Details Potentiometer R2 adjusts the gain of the internal preamp stage of the TPA0242amplifier by adjusting the control voltage applied to the VOLUME terminal (pin3) of the IC. Rotating the potentiometer slider clockwise decreases the appliedco...

Page 23 - Depop Circuitry; NOT to; Single-Ended Operation

The TPA0242 Audio Power Amplifier Evaluation Module 3-7 Details 3.2.4 Depop Circuitry The TPA0242 amplifier IC contains internal circuitry to minimize the varioustransients that might appear at the output during the transition from power offor shutdown to normal operation, or when transitioning betw...

Page 24 - Using The TPA0242 EVM With the Plug-N-Play Evaluation Platform; Installing and Removing EVM Boards; EVM Insertion; ) Remove all power from the evaluation platform.; ) Remove all power from the evaluation platform.

Using The TPA0242 EVM With the Plug-N-Play Evaluation Platform 3-8 Details 3.3 Using The TPA0242 EVM With the Plug-N-Play Evaluation Platform The TPA0242 audio amplifier evaluation module was designed to be used withthe TI plug-n-play audio amplifier evaluation platform. It simply plugs intosocket U...

Page 25 - TPA0242 Module Jumper Settings and Switches; ON; Figure 3–5. TPA0242 EVM Jumpers and Switches

Using The TPA0242 EVM With the Plug-N-Play Evaluation Platform 3-9 Details 3.3.2 TPA0242 Module Jumper Settings and Switches The TPA0242 EVM is equipped with a pushbutton SPST switch and a jumperthat acts as an SPST switch to allow module operation to be modified to suitvarious requirements. In the ...

Page 26 - S1 — Shutdown Switch; S3 — Input Mode Jumper; , so that when S3 is ON, the IC is held in the HP input mode re-; S4 — Input and Output Mode Jumper

Using The TPA0242 EVM With the Plug-N-Play Evaluation Platform 3-10 Details 3.3.2.1 S1 — Shutdown Switch Pushbutton switch S1 on the EVM allows the manual shutdown of theTPA0242 amplifier IC. 3.3.2.2 S3 — Output Mode Jumper To keep the module amplifier IC in the single-ended output mode regardlessof...

Page 27 - Signal Routing; Figure 3–6. Platform Signal Routing and Outputs

Using The TPA0242 EVM With the Plug-N-Play Evaluation Platform 3-11 Details 3.3.3 Signal Routing Signal flow on the platform is controlled by two signal routing switches, asshown in Figure 3 – 6. Figure 3–6. Platform Signal Routing and Outputs U1 Signal Conditioning On Off U5 Stereo Headphone Amplif...

Page 28 - , the module operates; Headphone Jack Control Signals; switch in the headphone jack pulls one line or the other up to V; through a; Figure 3–7. Mute/Mode and Polarity Control

Using The TPA0242 EVM With the Plug-N-Play Evaluation Platform 3-12 Details 3.3.4 Mute (Shutdown)/Mode The TPA0242 EVM is equipped with a shutdown control input pin. When thisinput is pulled to ground, the TPA0242 amplifier IC on the module enters theshutdown mode and dissipates very little power. W...

Page 29 - MUTE

Using The TPA0242 EVM With the Plug-N-Play Evaluation Platform 3-13 Details 3.3.4.2 Mute/Mode Select (JP6) A 3-pin jumper header (JP6) on the platform, functioning as an SPDT switch,routes the control signal from the headphone jack to either the shutdowncontrol input pin or the mode control input pi...

Page 30 - Power Requirements

Power Requirements 3-14 Details 3.3.5 Power Requirements The TPA0242 audio power amplifier evaluation module can operate from anyvoltage between approximately 4.5 V and 5.5 V; however, the TPA0242amplifier IC on the module is characterized for operation at 5 V. For bestperformance (highest output po...

Page 31 - Inputs and Outputs; Inputs; Figure 3–8. Typical Headphone Plug

Inputs and Outputs 3-15 Details 3.3.6 Inputs and Outputs The TI plug-n-play audio amplifier evaluation platform is equipped with severalstandard conectors for audio inputs and outputs. 3.3.6.1 Inputs In most cases, audio signals enter the platform through either a pair of RCAphono jacks (J3 and J5) ...

Page 32 - Using The TPA0242 EVM Stand-Alone; TPA0242 EVM Connected for BTL Output; Figure 3–9. TPA0242 EVM Connected for Stereo BTL Output

Using The TPA0242 EVM Stand-Alone 3-16 Details 3.4 Using The TPA0242 EVM Stand-Alone Using the TPA0242 audio power amplifier evaluation module stand-alone ismuch the same as using it with the platform. The same 4.5-V to 5.5-V powersupply range and the isolated OUT+ and OUT– lines for BTL operationre...

Page 33 - TPA0242 EVM Connected for Single-Ended Output; Figure 3–10. TPA0242 EVM Connected for Stereo Single-Ended Output

Using The TPA0242 EVM Stand-Alone 3-17 Details 3.4.2 TPA0242 EVM Connected for Single-Ended Output Figure 3–10. TPA0242 EVM Connected for Stereo Single-Ended Output 33 µ F – 1000 µ F + + 33 µ F – 1000 µ F Audio Input (Right) Audio Input (Left) 5 V GND ROUT+ ROUT– SE/BTL S1 SHUTDOWN GND LOUT– LOUT+ C...

Page 34 - TPA0242 Audio Power Amplifier Evaluation Module Parts List

TPA0242 Audio Power Amplifier Evaluation Module Parts List 3-18 Details 3.5 TPA0242 Audio Power Amplifier Evaluation Module Parts List Table 3–4. TPA0242 EVM Parts List Reference Description Size EVM Qty. Manufacturer/ Part Number Digi-Key Number C5 Capacitor, 0.1 µ F, 10%, nonpolarized 0805 1 Murat...