User’s Guide July 2003 Mixed-Signal Products SLOU162
IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.
EVM IMPORTANT NOTICE Texas Instruments (TI) provides the enclosed product(s) under the following conditions: This evaluation kit being sold by TI is intended for use for ENGINEERING DEVELOPMENT OR EVALUATION PURPOSES ONLY and is not considered by TI to be fit for commercial use.
EVM WARNINGS AND RESTRICTIONS It is important to operate this EVM within the input voltage range of 2.5 V to 5.5 V. Exceeding the specified input range may cause unexpected operation and/or irreversible damage to the EVM. If there are questions concerning the input range, please contact a TI field representative prior to connecting the input power. Applying loads outside of the specified output range may result in unintended operation and/or possible permanent damage to the EVM.
Information About Cautions and Warnings Preface Read This First Information About Cautions and Warnings This book may contain cautions and warnings. This is an example of a caution statement. A caution statement describes a situation that could potentially damage your software or equipment. This is an example of a warning statement. A warning statement describes a situation that could potentially cause harm to you. The information in a caution or a warning is provided for your protection.
FCC Warning FCC Warning This equipment is intended for use in a laboratory test environment only. It generates, uses, and can radiate radio frequency energy and has not been tested for compliance with the limits of computing devices pursuant to subpart J of part 15 of FCC rules, which are designed to provide reasonable protection against radio frequency interference.
Contents Contents 1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.1 Feature Highlights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3 TPA6211A1 EVM Specifications . . . . . . . . . . . .
Contents vi
Chapter 1 Introduction This chapter provides an overview of the Texas Instruments (TI) TPA6211A1 audio amplifier evaluation module (TPA6211A1EVM). It includes a list of EVM features, a brief illustrated description of the module, and a list of EVM specifications. Topic Page 1.1 Feature Highlights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–2 1.2 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–3 1.
Feature Highlights 1.1 Feature Highlights The TI TPA6211A1 audio amplifier evaluation module and the TI plug-n-play audio amplifier evaluation platform include the following features: - TPA6211A1 Low-Voltage Audio Power Amplifier Evaluation Module J Fully differential amplifier J Single channel, bridge-tied load (BTL) J 2.5-V to 5.5-V operation J 3.
Description 1.2 Description The TPA6211A1 audio power amplifier evaluation module is a complete, low-power single-channel audio power amplifier. It consists of the TI TPA6211A1 3.1-W low-voltage audio power amplifier IC along with a small number of other parts mounted on a circuit board that is approximately one and a quarter inches square (see Figure 1–1). Figure 1–1. TI TPA6211A1 Audio Amplifier Evaluation Module Single in-line header pins are mounted to the underside of the module circuit board.
TPA6211A1 EVM Specifications 1.3 TPA6211A1 EVM Specifications Supply voltage range, VDD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.5 V to 5.5 V Power supply current rating required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 A Continuous output power, PO: 3-Ω BTL, VDD = 5 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.1 W Audio input voltage, VI . . . . . . . . . . . . . . . . . . . . .
Chapter 2 Operation Follow the steps in this chapter to prepare the TPA6211A1 audio amplifier EVM for use. Using the TPA6211A1 EVM with the TI plug-n-play audio amplifier evaluation platform is a quick and easy way to connect power, signal and control inputs, and signal outputs to the EVM, using standard connectors. However, the audio amplifier evaluation module can be used stand-alone by making connections directly to the module pins, and it can be wired directly into existing circuits or equipment.
Precautions 2.1 Precautions Power Supply Input Polarity and Maximum Voltage Always ensure that the polarity and voltage of the external power connected to VCC power input connector J1, J2, and/or VDD power 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.
Quick Start List for Platform 2.2 Quick Start List for Platform Follow these steps when using the TPA6211A1 EVM with the TI plug-n-play audio amplifier evaluation platform (see the platform user’s guide, SLOU011, for additional details). Numbered callouts for selected steps are shown in Figure 2–1. - Platform preparations 1) Ensure that all external power sources are set to off and that the platform power switch S1 is set to off.
Quick Start List for Stand-Alone 2.3 Quick Start List for Stand-Alone Follow these steps to use the TPA6211A1 EVM stand-alone or when connecting it into existing circuits or equipment. Connections to the TPA6211A1 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. Numbered callouts for selected steps are shown in Figure 2–2. Figure 2–2.
References 2.4 References 2.4.1 TPA6211A1 EVM Connected for Stereo BTL Output Figure 2–3.
TPA6211A1 Audio Power Amplifier Evaluation Module Parts List 2.4.2 TPA6211A1 EVM Schematic Diagram Figure 2–4. TPA6211A1 EVM Schematic Diagram VDD 2.5 V to 5.5 V VDD R3 100 kΩ GND C4 10 µF + S1 SHUTDOWN VO – SHUTDOWN C1 0.22 µF C3 0.22 µF GND IN+ VDD IN – VO + OUT– IN+ C2 0.22 µF BYPASS C5 0.22 µF R1 20 kΩ GND OUT+ IN– R2 20 kΩ 2.4.3 TPA6211A1 Audio Power Amplifier Evaluation Module Parts List Table 2–3.
TPA6211A1 EVM PCB Layers 2.4.4 TPA6211A1 EVM PCB Layers The following illustrations depict the TPA6211A1 EVM PCB layers and silkscreen. These drawings are not to scale. Gerber plots can be obtained from any TI sales office. Figure 2–5. TPA6211A1 EVM Top Layer Figure 2–6.
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