User’s Guide August 2004 Mixed-Signal Products SLOU167
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 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 1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 1.1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 1.2 TPA6204A1 EVM Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 2 Operation . . . . . . . . . . . . . . . . . . . . . . . .
Contents vi
Chapter 1 This chapter provides an overview of the Texas Instruments (TI) TPA6204A1 audio amplifier evaluation module (TPA6204A1EVM). It includes a list of EVM features, a brief illustrated description of the module, and a list of EVM specifications. Topic Page 1.1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1−2 1.2 TPA6204A1EVM Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Description 1.1 Description The TPA6204A1 audio power amplifier evaluation module is a complete, low-power single-channel audio power amplifier. It consists of the TI TPA6204A1 1.7-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 TPA6204A1 Audio Amplifier Evaluation Module 1.2 TPA6204A1 EVM Specifications Supply voltage range, VDD . . . . . . . . . . . . . . . .
Chapter 2 The following section desribes the steps to use the TPA6204A1EVM stand-alone or with existing circuits. Connections can be made directly to the module pins or it can be wired directly into existing circuits or equipment. Topic 2.1 Page Quick Start List for Stand-Alone . . . . . . . . . . . . . . . . . . . . . . . . . . .
Quick Start List for Stand-Alone 2.1 Quick Start List for Stand-Alone 2.1.1 Power Supply 1) Ensure that all external power sources are set to OFF. 2) Connect an external regulated power supply, between 2.5 V and 5.5 V to the module VDD and GND pins, taking care to observe marked polarity. 2.1.2 Inputs and Outputs 1) Ensure that the audio source level is set to minimum. 2) Connect the positive lead from the audio source to the module IN+ pin and the negative lead to the IN− pin. 2.1.
Chapter 3 This chapter contains the schematic, parts list and the EVM PCB layers. Topic Page 3.1 TPA6204A1 EVM Schematic Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2 3.2 TPA6204A1 Audio Power Amplifier Evaluation Module Parts List . 3-2 3.3 TPA6204A1 EVM PCB Layers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TPA6204A1 EVM Schematic Diagram 3.1 TPA6204A1 EVM Schematic Diagram Figure 3−1. TPA6204A1 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 C5 0.22 µF GND IN+ VDD IN − VO + OUT− IN+ C2 0.22 µF BYPASS C3 0.22 µF R1 20 kΩ GND OUT+ IN− R2 20 kΩ 3.2 TPA6204A1 Audio Power Amplifier Evaluation Module Parts List Table 3−1.
TPA6204A1EVM PCB Layers 3.3 TPA6204A1EVM PCB Layers The following illustrations depict the TPA6204A1EVM PCB layers and silkscreen. These drawings are not to scale. Gerber plots can be obtained from the product folder on www.ti.com under Related Products − Development Tools. Figure 3−2. TPA6204A1 EVM Top Layer Figure 3−3.
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