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Summary of Contents for Texas Instruments TPA301
- Page 1 TPA301 Audio Power Amplifier Evaluation Module User’s Guide 2001 Mixed-Signal Products SLOU014A...
- 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. TPA301 350-mW Low-Voltage Audio Power Amplifier (literature number SLOS208) This is the data sheet for the TPA301 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 TPA301 EVM With The Plug-N-Play Evaluation Platform 3.3.1... - Page 6 TPA301 EVM Connected for Stereo BTL Output 3–9 TPA301 EVM Connected for Stereo Single-Ended Output Tables 2–1 Typical TI Plug-N-Play Platform Jumper and Switch Settings for the TPA301 2–2 Platform Jumper and Switch Settings for the TPA301 3–1 TPA301 EVM Parts List .
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Page 7: Introduction
This chapter provides an overview of the Texas Instruments (TI ) TPA301 audio amplifier evaluation module (SLOP115). 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 TPA301 audio amplifier evaluation module and the TI plug-n-play audio amplifier evaluation platform include the following features: TPA301 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 TPA301 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 platform switch and jumper settings shown in Table 2–1 are typical for the TPA301 EVM and will cause the TPA301 to mute when a plug is inserted into platform headphone jack J10. Table 2–1. Typical TI Plug-N-Play Platform Jumper and Switch Settings for the TPA301... -
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 Mute control input (causes the TPA301 to mute if a plug is inserted into platform headphone jack J10) Table 2–2. -
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 TPA301 EVM stand-alone or when connecting it into existing circuits or equipment. Connections to the TPA301 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 TPA301 IC, the evaluation module, and the steps in the Quick-Start List, additional application information, and a parts list for the TPA301 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 Tpa301 Audio Amplifier Evaluation Module
3.2 The TPA301 Audio Power Amplifier Evaluation Module The TPA301 audio power amplifier evaluation module is powered by a TPA301 350-mW low-power audio amplifier IC and includes onboard gain adjustment, a shutdown control signal input with onboard switch, and can be operated in either the BTL or single-ended output mode. -
Page 18: Tpa301 Audio Amplifier Ic
3.2.1 TPA301 Audio Amplifier IC The TPA301 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: Module Gain
3.2.4 Module Gain The TPA301 evaluation module can be set for an overall gain of between 2 and 22 by adjustment of the the onboard gain control, R4. The TPA301 amplifier IC, as most other amplifiers, exhibits its best distortion and noise performance at lower gain levels (see the TPA301 data sheet). -
Page 20: Using The Tpa301 Evm With The Plug-N-Play Evaluation Platform
Using The TPA301 EVM With the Plug-N-Play Evaluation Platform 3.3 Using The TPA301 EVM With the Plug-N-Play Evaluation Platform The TPA301 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
(J10), set switch S3 to the power amplifier position (U2 – U4 ) and reverse the jumper on JP8 to prevent muting of the TPA301 module when a plug is inserted into J10 — use this setting only if the TPA301 EVMs are to drive single-ended loads connected to J10... -
Page 22: Muting
Using The TPA301 EVM With the Plug-N-Play Evaluation Platform 3.3.3 Muting The TPA301 EVM is equipped with a mute (shutdown) control input pin. When this input is tied to V assumes an ultra-low power mode. When the control input is tied to GND or allowed to float, amplifier operation resumes. -
Page 23: Power Requirements
Power Requirements The TPA301 audio evaluation module can operate from any voltage between approximately 2.5 V and 5.5 V, however, the TPA301 amplifier IC on the module is characterized for operation at 3.3 V and 5 V. For best performance... -
Page 24: Inputs And Outputs
J10 to the output lines of either the headphone amplifier socket or the power amplifier sockets (Figure 3 – 5). When the TPA301 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 25: Using The Tpa301 Evm Stand-Alone
3.4 Using The TPA301 EVM Stand-Alone Using the TPA301 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 26: Tpa301 Evm
Using The TPA301 EVM Stand-Alone 3.4.2 TPA301 EVM Connected for Single-Ended Output Figure 3–9. TPA301 EVM Connected for Stereo Single-Ended Output Audio Input (Right) External Mute Control (active high) Audio Input (Left) 3-12 5 VDC +5 V Shutdown C3 C5 OUT–... -
Page 27: Tpa301 Evm Parts List
3.5 TPA301 Audio Power Amplifier Evaluation Module Parts List Table 3–1. TPA301 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 C2, C3 Capacitor, 2.2 F, 20%, nonpolarized Capacitor, 0.1 F, 16 V... - Page 28 3-14 Details...
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