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User’s Guide
August 1999 Mixed-Signal Products
SLOU051A
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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. All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those pertaining to warranty, patent infr
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Preface Related Documentation From Texas Instruments 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. TPA005D12 CLASS-D STEREO AUDIO POWER AMPLIFIER (TI Literature Number SLOS246) This is the data sheet for the TPA005D12 audio amplifier integrated circuit. Design Considerations for Class-D Audio Power Amplifiers, (TI Literature Number SLOA031) This applic
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Running Title—Attribute Reference Contents 1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 1.1 Feature Highlights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 1.2 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 1.3 TPA0
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Running Title—Attribute Reference Figures 1–1 The TI TPA005D12 Class-D Stereo Audio Power Amplifier EVM — Top View . . . . . . . . . 1-3 1–2 The TI TPA005D12 Class-D Stereo Audio Power Amplifier EVM — Bottom View . . . . . . 1-3 2–1 Quick Start Platform Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 3–1 The TI Plug-N-Play Audio Amplifier Evaluation Platform . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2 3–2 The TI
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Chapter 1 Introduction This chapter provides an overview of the Texas Instruments (TI) TPA005D12 class-D stereo audio power amplifier evaluation module (SLOP246). 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 . . . . . . . . . . . . . . . . . . . . . . . . .
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Feature Highlights 1.1 Feature Highlights The TI TPA005D12 class-D stereo audio power amplifier evaluation module and the TI plug-n-play audio amplifier evaluation platform include the following features: TPA005D12 Class-D Stereo Audio Power Amplifier Evaluation Module Internal depop circuitry to greatly reduce turn-on transients in outputs Dual channel, bridge-tied load (BTL) only operation 5 V operation 2 W BTL output into 4 W at 5 V Low current consumption in shutdown/mute mode (5
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Description 1.2 Description The TPA005D12 class-D stereo audio power amplifier evaluation module is a complete, 2-Watt per channel stereo audio power amplifier. It consists of the TI TPA005D12 class-D stereo audio power amplifier IC along with a small number of other parts mounted on a circuit board that measures approximately 2 inches by 2 inches (Figure 1–1 and 1–2). Figure 1–1. The TI TPA005D12 Class-D Stereo Audio Power Amplifier EVM — Top View TP12 L3 L4 TP11 Texas Instruments 1999 TP10
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TPA005D12 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 TPA005D12 class-D evaluation module and is a convenient vehicle for demonstrating TI’s audio power amplifier and related evaluation modules. The EVM simply plugs in
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Chapter 2 Quick Start Follow the steps in this chapter to quickly prepare the TPA005D12 class-D stereo audio amplifier EVM for use. Using the TPA005D12 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. However, the audio amplifier evaluation module can be used stand-alone by making connections directly to the module pins, and it can be wired direct
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+ VR2 J6 VDD J10 In/Out F2 Right Left +– – + Left J8 Right J9 J7 Out Out Out Out Spk(U2-U4) C3 C2 JP8 U6 JP6 + + LED2 POWER VDD JP7 U2 HP(U5) SUPPLY S3 U2-U4 HP Source U5 U3 U4 JP5 U5 IDD B1 Off On On S1 TP1 S2 Conditioning GND Off Pwr U1 LED1 VCC JP3 Batt D1 JP2 AC/DC D2 (J2) JP1 VCC(J1) D3 TEXAS DC J3 J4 J5 INSTRUMENTS SOURCE Right Stereo Left 1997 In In In J1 D4 J2 VCC AC/DC In In + Precautions 2.1 Precautions Power Supply Input Polarity and Maximum Voltage Always ensure that the polarity and
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Quick Start List for Platform 2.2 Quick Start List for Platform Follow these steps when using the TPA005D12 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 are set to OFF. 2) Install a TPA005D12 module in platform socket U2, taking care to align the
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Quick Start List for Stand-Alone 2.3 Quick Start List for Stand-Alone Follow these steps to use the TPA005D12 class-D EVM stand-alone or to connect it into existing circuits or equipment. Connections to the TPA005D12 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. 2) Connect an external regulated power supply set to
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Chapter 3 Details This chapter provides details on the TPA005D12 IC, the evaluation module, and the steps in the Quick-Start list, a discussion of class-D amplifiers, additional application information, a parts list for the TPA005D12 class-D evaluation module, module performance graphs, and module PCB layer illustrations. Topic Page 3.1 Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2 3.2 The TPA005D12 Class-D Audio Power Ampli
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+ VR2 J6 VDD J10 In/Out F2 +– Right – Left+ J8 Left Right J9 J7 Out Out Out Out Spk(U2-U4) C3 C2 JP8 U6 JP6 + + LED2 POWER VDD JP7 U2 HP(U5) SUPPLY S3 U2-U4 HP Source U5 U3 U4 JP5 U5 IDD B1 Off On On S1 TP1 S2 Conditioning GND Off Pwr U1 LED1 VCC JP3 Batt D1 JP2 AC/DC D2 (J2) JP1 VCC(J1) D3 TEXAS DC J3 J5 J4 INSTRUMENTS SOURCE Right Stereo Left 1997 In In In J1 D4 J2 VCC AC/DC In In + Precautions 3.1 Precautions Power Supply Input Polarity and Maximum Voltage Always ensure that the polarity and
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The TPA005D12 Class-D Audio Power Amplifier Evaluation Module 3.2 The TPA005D12 Class-D Audio Power Amplifier Evaluation Module The TPA005D12 class-D stereo audio power amplifier evaluation module is powered by a TPA005D12 class-D stereo power amplifier integrated circuit. The EVM is capable of delivering greater than 2 W of continuous average power per channel into 4-W loads at less than 0.6% THD+N over a 20-Hz to 20-kHz frequency range from a 5-V supply. The TPA005D12 amplifier IC operates in
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The TPA005D12 Class-D Audio Power Amplifier Evaluation Module Figure 3–2. The TI TPA005D12 Class-D Stereo Audio Power Amplifier EVM — Top View TP12 L4 L3 TP11 Texas Instruments 1999 TP10 TP9 L1 C19 C18 L2 U1 C13 C14 + TP6 TP5 + TP7 TP4 TP3 C5 R2 TP2 R1 TP1 GND +RIN– –LIN+GND Figure 3–3. The TI TPA005D12 Class-D Stereo Audio Power Amplifier EVM — Bottom View C24 C25 C23 C21 C22 C20 C17 C16 C15 C9 C12 C10 C11 C8 C7 C6 3-4 Details SLOP246 TPA005D12 EVM Board VDD2 GND Rout+ C4 Rout– C1 Mute SD S2
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The TPA005D12 Class-D Audio Power Amplifier Evaluation Module Figure 3–4. TPA005D12 Class-D EVM Schematic Diagram VDD R2 R1 VDD +5V 100k 100k VDD2 +5V SD S2 TP2 TPA005D12 SD 1 48 TP3 Mute SHUTDOWN COSC C5 2 S1 47 MUTE AGND 470pF Mute 3 46 AGND AGND C1 C3 1m F 1m F 4 45 LIN– LINN RINN RIN– 1m F C4 C2 1m F 5 44 LIN+ LINP RINP RIN+ C6 470pF C7 470pF 6 43 LCOMP RCOMP 7 42 C13 C9 C10 C11 C12 C14 AGND FAULT_0 TP2 C8 1m F 8 41 VDD FAULT_1 1m F 1m F 10m F 10m F TP3 9 40 VDD LPVDD RPVDD VDD2 10 39 LOUT+
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The TPA005D12 Class-D Audio Power Amplifier Evaluation Module 3.2.2 Overview of Class-D Audio Amplifiers Class-D audio amplifiers are very similar in operation to switch-mode power supplies in that both compare an input signal with a reference to create an error voltage that controls a pulse-width modulator (PWM) circuit. The PWM circuit then produces an output signal at constant frequency and with a duty cycle that varies according to the input signal. A block diagram of the major components th
