Page 2 - User’s Guide
TPA311 Audio Power Amplifier Evaluation Module User’s Guide SLOU013 February 1998 Printed on Recycled Paper
Page 4 - 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 TPA311 350-mW LOW-VOLTAGE...
Page 5 - PIC
If You Need Assistance iv If You Need Assistance. . . If you want to. . . Do this. . . Request more information aboutTexas Instruments Digital SignalProcessing (DSP) products Call the PIC † hotline: (972) 644–5580 Or send a fax to the PIC:(972) 480–7800 Or write to:Texas Instruments IncorporatedProd...
Page 6 - Contents; Introduction
Running Title—Attribute Reference v Chapter Title—Attribute Reference Contents 1 Introduction 1-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.1 Feature Highlights 1-3 . . . . . . . . . . . . . . . . . . ....
Page 7 - Figures
Running Title—Attribute Reference vi Figures 1–1 The TI TPA311 Audio Amplifier Evaluation Module 1-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–1 Quick Start Platform Map 2-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
Page 8 - 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 ) TPA311 Audio Amplifier Evaluation Module (SLOP116). 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 10 - Feature Highlights
Feature Highlights 1-3 Introduction 1.1 Feature Highlights The TI TPA311 Audio Amplifier Evaluation Module and the TI Plug-N-PlayAudio Amplifier Evaluation Platform include the following features: - TPA311 Low-Voltage Audio Power Amplifier Evaluation Module J Single channel, bridge-tied load (BTL) o...
Page 11 - Description; Figure 1–1. The TI TPA311 Audio Amplifier Evaluation Module; TPA311 EVM Specifications; Supply voltage range, V; Audio input voltage, V
Description 1-4 Introduction 1.2 Description The TPA311 Audio Power Amplifier Evaluation Module is a complete, low-power single-channel audio power amplifier. It consists of the TI TPA311350-mW Low-Voltage Audio Power Amplifier IC along with a small number ofother parts mounted on a circuit board th...
Page 12 - Quick Start; Chapter 2
2-1 Quick Start Quick Start The steps in this chapter can be followed to quickly prepare the TPA311 audioamplifier EVM for use. While using the TPA311 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 ...
Page 13 - Power Supply Input Polarity and Maximum Voltage; power; 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 14 - Quick Start List for Platform; Table 2–2. Platform Jumper and Switch Settings for the TPA311
Quick Start List for Platform 2-3 Quick Start 2.2 Quick Start List for Platform Use the following steps when using the TPA311 EVM with the TI Plug-N-PlayAudio Amplifier Evaluation Platform (see the platform user’s guide, SLOU011,for additional details). Numbered callouts for selected steps are shown...
Page 15 - Quick Start List for Stand-Alone; Power supply; ON
Quick Start List for Stand-Alone 2-4 Quick Start 2.3 Quick Start List for Stand-Alone Use the following steps to use the TPA311 EVM stand-alone or whenconnecting it into existing circuits or equipment. Connections to the TPA311module header pins can be made via individual sockets, wire-wrapping, ors...
Page 16 - Details; Chapter 3
3-1 Details Details This chapter provides details on the TPA311 IC, the evaluation module, andthe steps in the Quick-Start List, additional application information, and a partslist for the TPA311 evaluation module. Topic Page 3.1 Precautions 3–2 3.2 The TPA311 Audio Power Amplifier Evaluation Module...
Page 17 - 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 18 - The TPA311 Audio Power Amplifier Evaluation Module; Figure 3–3. TPA311 EVM Schematic Diagram
The TPA311 Audio Power Amplifier Evaluation Module 3-3 Details 3.2 The TPA311 Audio Power Amplifier Evaluation Module The TPA311 Audio Power Amplifier Evaluation Module is powered by aTPA311 350-mW Low-Power Audio Amplifier IC and includes on-board gainadjustment, a shutdown control signal input wit...
Page 19 - TPA311 Audio Amplifier IC; –, and neither line is connected to ground. BTL operation; BTL Operation; NOT to system
The TPA311 Audio Power Amplifier Evaluation Module 3-4 Details 3.2.1 TPA311 Audio Amplifier IC The TPA311 audio amplifier IC is a CMOS device intended primarily forbridge-tied load (BTL) operation in battery-powered applications. It is suppliedin a very small surface-mount package and has been desig...
Page 20 - SIngle-Ended Operation; inserted into the platform headphone output jack
The TPA311 Audio Power Amplifier Evaluation Module 3-5 Details 3.2.3 SIngle-Ended Operation For single-ended operation, the module SE/BTL control input pin must be heldhigh. The speaker (or headphone) load is connected to the module OUT+output pin through a coupling capacitor, and to platform/system...
Page 21 - Using The TPA311 EVM With the Plug-N-Play Evaluation Platform; Installing and Removing EVM Boards; EVM Insertion
Using The TPA311 EVM With the Plug-N-Play Evaluation Platform 3-6 Details 3.3 Using The TPA311 EVM With the Plug-N-Play Evaluation Platform The TPA311 Audio Amplifier Evaluation Module was designed to be used withthe TI Plug-N-Play Audio Amplifier Evaluation Platform. It simply plugs intosocket U3 o...
Page 22 - Signal Routing; Figure 3–5. Platform Signal Routing and Outputs
Using The TPA311 EVM With the Plug-N-Play Evaluation Platform 3-7 Details 3.3.2 Signal Routing Signal flow on the platform is controlled by two signal routing switches, asshown in Figure 3 – 5. Figure 3–5. Platform Signal Routing and Outputs U1 Signal Conditioning On Off U5 Stereo Headphone Amplifie...
Page 23 - Headphone Jack Control Signals; Figure 3–6. Mute/Mode and Polarity Control
Using The TPA311 EVM With the Plug-N-Play Evaluation Platform 3-8 Details 3.3.3 Mute/Mode The TPA311 EVM is equipped with a mute (shutdown) control input pin. Whenthis input is tied to V DD , the TPA311 amplifier IC on the module shuts down and assumes an ultra-low power mode. When the EVM control i...
Page 24 - MUTE
Using The TPA311 EVM With the Plug-N-Play Evaluation Platform 3-9 Details 3.3.3.2 Mute/Mode Select (JP6) A 3-pin jumper header (JP6) on the platform, functioning as a SPDT switch,routes the control signal from the headphone jack to either the mute controlinput pin or the mode control input pin of th...
Page 25 - Power Requirements
Power Requirements 3-10 Details 3.3.4 Power Requirements The TPA311 Audio Power Amplifier Evaluation Module can operate from anyvoltage between approximately 2 V and 5.5 V, however, the TPA311 amplifierIC on the module is characterized for operation at 3.3 V and 5 V. For bestperformance (highest out...
Page 26 - Inputs and Outputs; Inputs; Figure 3–7. Typical Headphone Plug
Inputs and Outputs 3-11 Details 3.3.5 Inputs and Outputs The TI Plug-N-Play Audio Amplifier Evaluation Platform is equipped withseveral standard conectors for audio inputs and outputs. 3.3.5.1 Inputs In most cases, audio signals enter the platform through either a pair of RCAphono jacks (J3 and J5) ...
Page 27 - Using The TPA311 EVM Stand-Alone; TPA311 EVM Connected for BTL Output; Figure 3–8. TPA311 EVM Connected for Stereo BTL Output
Using The TPA311 EVM Stand-Alone 3-12 Details 3.4 Using The TPA311 EVM Stand-Alone Using the TPA311 Audio Power Amplifier Evaluation Module stand-alone ismuch the same as using it with the platform. The same 2-V to 5.5-V power sup-ply range and the isolated OUT+ and OUT– lines for BTL operation requ...
Page 28 - TPA311 EVM Connected for Single-Ended Output; Figure 3–9. TPA311 EVM Connected for Stereo Single-Ended Output
Using The TPA311 EVM Stand-Alone 3-13 Details 3.4.2 TPA311 EVM Connected for Single-Ended Output Figure 3–9. TPA311 EVM Connected for Stereo Single-Ended Output 5 VDC Audio Input (Right) 5 VDC Audio Input (Left) External Mute Control (active high) GND 33 µ F – 1000 µ F + + 33 µ F – 1000 µ F C4 R3 IN...
Page 29 - Cermet
TPA311 Audio Power Amplifier Evaluation Module Parts List 3-14 Details 3.5 TPA311 Audio Power Amplifier Evaluation Module Parts List Table 3–1. TPA311 EVM Parts List Ref. Description Size EVM Qty. Manufacturer/ Part Number Digi-Key Number R4 Trim Pot, 200 k Ω Cermet ST SL, (through hole) 1 Bourns332...
