TPA032D03 Mono ClassĆD Audio Power Amplifier With Stereo Headphone Amplifier Evaluation Module User’s Guide September 2000 Mixed-Signal Products SLOU082
IMPORTANT NOTICE 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.
Preface Related Documentation From Texas Instruments J J J J TI Plug-N-Play Audio Amplifier Evaluation Platform (TI Literature Number SLOU011) provides detailed information on the evaluation platform and its use with TI audio evaluation modules. TPA032D03 CLASS-D AUDIO POWER AMPLIFIER (TI Literature Number SLOS283) This is the data sheet for the TPA032D03 audio amplifier integrated circuit.
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Running Title—Attribute Reference Contents 1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.1 Feature Highlights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.
Running Title—Attribute Reference Figures 1–1 1–2 2–1 3–1 3–2 3–3 3–4 3–5 3–6 3–7 3–8 3–9 3–10 The TI TPA032D03 Mono Class-D Audio Power Amplifier EVM — Top View . . . . . . . . . . 1-3 The TI TPA032D03 Mono Class-D Audio Power Amplifier EVM — Bottom View . . . . . . . 1-3 Quick Start Platform Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 The TI Plug-N-Play Audio Amplifier Evaluation Platform . . . . . . . . . . . . . . . . . . . . . .
Chapter 1 Introduction This chapter provides an overview of the Texas Instruments (TI) TPA032D03 mono class-D audio power amplifier evaluation module (SLOP310). It includes a list of EVM features, a brief description of the module illustrated with a pictorial diagram, and a list of EVM specifications. Topic Page 1.1 Feature Highlights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–2 1.2 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Feature Highlights 1.
Description 1.2 Description The TPA032D03 mono class-D audio power amplifier evaluation module is a complete, 10-W mono audio power amplifier. It consists of the TI TPA032D03 mono class-D audio power amplifier IC along with a small number of other parts mounted on a circuit board that measures approximately 2 inches by 1 inches (Figure 1–1 and 1–2). ¼ ¾ Figure 1–1.
TPA032D03 Class-D EVM Specifications Single in-line header pins extend from the underside of the module circuit board to allow the EVM to either be plugged into the TI plug-n-play audio amplifier evaluation platform, or to be wired directly into existing circuits and equipment when used stand-alone. The platform has room for a single TPA032D03 class-D evaluation module and is a convenient vehicle for demonstrating TI’s audio power amplifier and related evaluation modules.
Chapter 2 Quick Start Follow the steps in this chapter to quickly prepare the TPA032D03 mono class-D audio amplifier EVM for use. Using the TPA032D03 class-D 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.
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 TPA032D03 class-D 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 and details appear in Chapter 3. - Platform Preparations 1) Ensure that all external power sources and platform power switch S1 are set to OFF.
Quick Start List for Stand-Alone 2.3 Quick Start List for Stand-Alone Follow these steps to use the TPA032D03 class-D EVM stand-alone or to connect it into existing circuits or equipment. Connections to the TPA032D03 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. - Power supply 1) Ensure that all external power sources are set to OFF.
Chapter 3 Details This chapter provides details on the TPA032D03 IC evaluation module, a parts list for the TPA032D03 class-D evaluation module, and module PCB layer illustrations. Topic Page 3.1 Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2 3.2 Plug-N-Play Platform Power Requirements and Connections . . . . . 3-3 3.3 Plug-N-Play Platform Inputs and Outputs . . . . . . . . . . . . . . . . . . . . . . . 3-4 3.
Precautions 3.1 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.
Plug-N-Play Platform Power Requirements and Connections 3.2 Plug-N-Play Platform Power Requirements and Connections The TPA032D03 mono class-D audio power amplifier evaluation module is designed to operate from a supply voltage between 9 V and 14 V. For best performance, the module should be operated at 12 V. The TI plug-n-play audio amplifier evaluation platform provides several options for powering the TPA032D03 class-D EVM.
Plug-N-Play Platform Inputs and Outputs 3.3 Plug-N-Play Platform Inputs and Outputs The TI plug-n-play audio amplifier evaluation platform is equipped with several standard conectors for audio inputs and outputs. 3.3.1 Inputs In most cases, audio signals enter the platform through either a pair of RCA phono jacks (J3 and J5) or a miniature (1/8″) mono phone jack (J4). Certain signal conditioning and amplifier EVMs, however, may have additional signal input connectors mounted on the module circuit board.
Plug-N-Play Platform Inputs and Outputs 3.4 Control and Indicator Circuits Three main control circuits are provided with the TPA032D03. The mute circuit grounds the output of the active amplifier, the mode circuit selects between the class-D amplifier and the headphone amplifier, and the shutdown circuit places the entire device into a power-saving sleep mode to minimize current consumption. Each of these inputs is TTL compatible: less than 0.
Plug-N-Play Platform Inputs and Outputs 3.6 Module Switches The TPA032D03 mono class-D audio amplifier evaluation module is equipped with two pushbutton switches that allow the module shutdown and mute functions to be manually activated. 3.6.1 S1 — Shutdown Switch To have the module amplifier IC enter the shutdown mode, press the Shutdown switch (S2) on the module. S2 connects the amplifier IC SHUTDOWN pin to ground, forcing it into a low-power state.
Using The TPA032D03 Class-D EVM Stand-Alone 3.7 Using The TPA032D03 Class-D EVM Stand-Alone Using the TPA032D03 mono class-D audio power amplifier evaluation module stand-alone is much the same as using it with the platform. The same 9-V to 14-V power supply range and the isolated OUT+ and OUT– lines for BTL operation requirements exist. Inserting a plug into the EVM headphone jack switches the EVM to the headphone mode and shuts down the class-D amplifier section.
Using The TPA032D03 Class-D EVM Stand-Alone 3.7.2 Input Connections The class-D amplifier input signals can be connected in either of two ways: differential or single-ended. For differential operation, connect the signal source to the positive and negative inputs (IN+ and IN– module pins). For single-ended operation, the input signal line should be connected to the IN+ module pin and the signal source ground wire should be connected to the IN– module pin.
TPA032D03 Class-D EVM Bill of Materials 3.8 TPA032D03 Class-D EVM Bill of Materials The components in the bill of materials (Table 3–4) were selected for their common values, availability, and the smallest size available to meet these criteria. Table 3–4. TPA032D03 Class-D EVM Bill of Materials Reference Description Size EVM Qty. Manufacturer/ Part Number C1, C2, C15 Capacitor, Ceramic Chip, 0.
TPA032D03 Class-D EVM Schematic 3.9 TPA032D03 Class-D EVM Schematic The TPA032D03 class-D EVM schematic is shown in Figure 3–4. Figure 3–4. TPA032D03 Class-D EVM Schematic Diagram J1 VDD R3 100k R5 100k R6 100k Ring Mode SD Mute S2 Mute R1 100k Mode S1 SD LIN– LIN+ C11† C10 10µF C9 1µF C7 1µF MUTE 3 MODE 4 INN 5 INP 6 COMP 7 AGND 8 9 VCC 10 C22 LOUT+ C23 1µF LOUT– TIP LHP 0.22µF C21 0.22µF L1 15µH 11 12 13 L2 15µH 14 15 16 C20 33µF R2 100k C18 5.6 pF R10 100k C2 0.
TPA032D03 Class-D EVM PCB Layers 3.10 TPA032D03 Class-D EVM PCB Layers The following illustrations depict the TPA032D03 class-D EVM PCB assembly and layers. These drawings are not to scale. Gerber plots can be obtained from any TI Sales Office. Figure 3–5. TPA032D03 Class-D EVM Top Assembly Figure 3–6.
TPA032D03 Class-D EVM PCB Layers Figure 3–7. TPA032D03 Class-D EVM Top Layer Figure 3–8.
TPA032D03 Class-D EVM PCB Layers Figure 3–9. TPA032D03 Class-D EVM Third Layer Figure 3–10.
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