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Summary of Contents for Texas Instruments TPA311
- Page 1 TPA311 Audio Power Amplifier Evaluation Module User’s Guide 2001 Mixed-Signal Products SLOU013A...
- Page 2 Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgment, including those pertaining to warranty, patent infringement, and limitation of liability.
- Page 3 SLOU011) provides detailed information on the evaluation platform and its use with TI audio evaluation modules. TPA311 350-mW Low-Voltage Audio Power Amplifier (literature number SLOS207) This is the data sheet for the TPA311 audio amplifier integrated circuit. FCC Warning This equipment is intended for use in a laboratory test environment only.
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Page 5: Table Of Contents
............Using The TPA311 EVM With The Plug-N-Play Evaluation Platform 3.3.1... - Page 6 TPA311 EVM Connected for Stereo BTL Output 3–9 TPA311 EVM Connected for Stereo Single-Ended Output Tables 2–1 Typical TI Plug-N-Play Platform Jumper and Switch Settings for the TPA311 2–2 Platform Jumper and Switch Settings for the TPA311 3–1 TPA311 EVM Parts List .
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Page 7: Introduction
This chapter provides an overview of the Texas Instruments (TI ) TPA311 audio amplifier evaluation module (SLOP116). It includes a list of EVM features, a brief description of the module illustrated with a pictorial diagram, and a list of EVM specifications. -
Page 8: Feature Highlights
Feature Highlights 1.1 Feature Highlights The TI TPA311 audio amplifier evaluation module and the TI plug-n-play audio amplifier evaluation platform include the following features: TPA311 Low-Voltage Audio Power Amplifier Evaluation Module Single channel, bridge-tied load (BTL) or single-ended operation 3.3-V and 5-V operation... -
Page 9: Description
The platform has room for a pair of TPA311 evaluation modules and is a convenient vehicle for demonstrating TI’s audio power amplifier and related evaluation modules. The EVMs simply plug into the platform, which auto-... - Page 10 Introduction...
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Page 11: Quick Start
The steps in this chapter can be followed to quickly prepare the TPA311 audio amplifier EVM for use. While using the TPA311 with the TI plug-n-play audio amplifier evaluation platform is a quick and easy way to connect power, signal... -
Page 12: Precautions
Precautions 2.1 Precautions Power Supply Input Polarity and Maximum Voltage Always ensure that the polarity and voltage of the external power connected to V input connector J6 are correct. Overvoltage or reverse-polarity power applied to these terminals can open onboard soldered-in fuses and cause other damage to the platform, installed evaluation modules, and/or the power source. -
Page 13: Quick Start List For Platform
3) Use switch S2 to select or bypass the signal conditioning EVM (U1) 4) Set control signal Polarity jumper JP8 to Hi 5) Set jumper JP6 to select the Mode control input (causes the TPA311 to switch to the single-ended output mode if a plug is inserted into platform... -
Page 14: Quick Start List For Stand-Alone
Quick Start List for Stand-Alone 2.3 Quick Start List for Stand-Alone Use the following steps to use the TPA311 EVM stand-alone or when connecting it into existing circuits or equipment. Connections to the TPA311 module header pins can be made via individual sockets, wire-wrapping, or soldering to the pins, either on the top or the bottom of the module circuit board. -
Page 15: Details
This chapter provides details on the TPA311 IC, the evaluation module, and the steps in the Quick-Start List, additional application information, and a parts list for the TPA311 evaluation module. Topic Precautions .......... -
Page 16: Precautions
Precautions 3.1 Precautions Power Supply Input Polarity and Maximum Voltage Always ensure that the polarity and voltage of the external power connected to V input connector J6 are correct. Overvoltage or reverse-polarity power applied to these terminals can open onboard soldered-in fuses and cause other damage to the platform, installed evaluation modules, and/or the power source. -
Page 17: The Tpa311 Audio Amplifier Evaluation Module
3.2 The TPA311 Audio Power Amplifier Evaluation Module The TPA311 audio power amplifier evaluation module is powered by a TPA311 350-mW low-power audio amplifier IC and includes on-board gain adjustment, a shutdown control signal input with on-board switch, and can be operated in either the BTL or single-ended output mode. -
Page 18: Tpa311 Audio Amplifier Ic
3.2.1 TPA311 Audio Amplifier IC The TPA311 audio amplifier IC is a CMOS device intended primarily for bridge- tied load (BTL) operation in battery-powered applications. It is supplied in a very small surface-mount package and has been designed to operate from low supply voltages (between approximately 2.5 V and 5.5 V) and deliver up to... - Page 19 3.2.4 Module Gain The TPA311 evaluation module can be set for an overall gain of between 2 and 22 by adjustment of the the onboard gain control, R4. The TPA311 amplifier IC, as most other amplifiers, exhibits its best distortion and noise performance at lower gain levels (see the TPA311 data sheet).
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Page 20: Using The Tpa311 Evm With The Plug-N-Play Evaluation Platform
Using The TPA311 EVM With the Plug-N-Play Evaluation Platform 3.3 Using The TPA311 EVM With the Plug-N-Play Evaluation Platform The TPA311 audio amplifier evaluation module was designed to be used with the TI plug-n-play audio amplifier evaluation platform. It simply plugs into socket U3 or U4. -
Page 21: Platform Signal Routing And Outputs
The audio signal from the input jacks can be applied to the signal conditioning socket (U1) if an EVM is installed there, or socket U1 can be bypassed and the audio input signal applied directly to the inputs of the TPA311 power amplifiers. Switch S2 selects signal conditioning or bypasses it 3.3.2.2... -
Page 22: Mute/Mode And Polarity Control
Using The TPA311 EVM With the Plug-N-Play Evaluation Platform 3.3.3 Mute/Mode The TPA311 EVM is equipped with a mute (shutdown) control input pin. When this input is tied to V assumes an ultralow-power mode. When the EVM control input is tied to GND or allowed to float, amplifier operation resumes. - Page 23 JP6. When JP6 is set to mute, use the following JP8 settings for the TPA311: To mute the TPA311 amplifier module when a plug is inserted into the headphone jack, jumper JP8 to Hi (this is the typical setting).
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Page 24: Power Requirements
J6 MUST NOT exceed the absolute maximum rating for the TPA311 amplifier IC installed on the evaluation module (6 V) or damage to the IC may result. In no case should voltage of the incorrect polarity or in excess of 6.1 V be applied to... -
Page 25: Inputs And Outputs
J10 to the output lines of either the headphone amplifier socket or the power amplifier sockets (Figure 3 – 5). When the TPA311 output signal is routed to J10 by S3, signals output via J10 are returned to platform ground when a plug is inserted (Figure 3 –... -
Page 26: Using The Tpa311 Evm Stand-Alone
Using The TPA311 EVM Stand-Alone 3.4 Using The TPA311 EVM Stand-Alone Using the TPA311 audio power amplifier evaluation module stand-alone is much the same as using it with the platform. The same 2.5-V to 5.5-V power supply range and the isolated OUT+ and OUT– lines for BTL operation re- quirement exists. -
Page 27: Tpa311 Evm Connected For Stereo Single-Ended Output
3.4.2 TPA311 EVM Connected for Single-Ended Output Figure 3–9. TPA311 EVM Connected for Stereo Single-Ended Output Audio Input (Right) External Mute Control (active high) Audio Input (Left) Using The TPA311 EVM Stand-Alone 5 VDC Shutdown –3 009227 OUT– OUT+ Literature #... -
Page 28: Tpa311 Evm Parts List
TPA311 Audio Power Amplifier Evaluation Module Parts List 3.5 TPA311 Audio Power Amplifier Evaluation Module Parts List Table 3–1. TPA311 EVM Parts List Ref. Description Trim Pot, 200 k Cermet ST SL, (through hole) Capacitor, 10 F, 6.3 V Capacitor, 1 F, +80%/–20%, nonpolarized...
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