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User’s Guide
March 2000 Mixed-Signal Products
SLOU074
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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 (literature number SLOU011) provides detailed information on the evaluation platform and its use with TI audio evaluation modules. TPA0242 Stereo 2-W Audio Power Amplifier (literature number SLOS287) This is the data sheet for the TPA0242 audio amplifier integrated circuit. FCC Warning This equipment is intended for use in a laboratory test environment only. It generates, uses, and can rad
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iv
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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 TPA0242 Audio Amplifier Evaluation Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 2–1 Quick Start Platform Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 2–2 Module Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4 2–3 Quick Start Module Map . . . . . . . . . . . . .
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Chapter 1 Introduction This chapter provides an overview of the Texas Instruments (TI) TPA0242 audio amplifier evaluation module (SLOP275). 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 TPA0242 audio amplifier evaluation module and the TI plug-n-play audio amplifier evaluation platform include the following features: TPA0242 stereo 2-W audio power amplifier evaluation module Internal depop circuitry to minimize transients in outputs Dual channel, bridge-tied load (BTL) or single-ended operation 2 W per channel output power into 3 W at 5 V, BTL Low current consumption in shutdown mode (150 m A) Internal input MUX selec
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S4 S3 S2 C12 R4 R3 C6 C9 C5 C8 C4 C7 C3 Description 1.2 Description The TPA0242 stereo 2-W audio power amplifier evaluation module is a complete, 2-watt per channel stereo audio power amplifier. It consists of the TI TPA0242 stereo 2-W audio power amplifier IC along with a small number of other parts mounted on a circuit board that measures approximately 2 1/4 inches by 1 1/2 inches (Figure 1–1). Figure 1–1. The TI TPA0242 Audio Amplifier Evaluation Module VDD GND R HP ROUT+ + C10 GND GND ROUT–
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1-4 Introduction
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Chapter 2 Quick Start The steps in this chapter can be followed to quickly prepare the TPA0242 audio amplifier EVM for use. Using the TPA0242 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 can be wired directly into existing circuits
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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 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 TPA0242 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 Figure 2–2, and details appear in Chapter 3. Platform preparations 1) Ensure that all external power sources are set to OFF and that the platform power switch S1 is set to OFF. 2) Install a TPA0242
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S4 S3 S2 C12 R4 R3 C6 C9 C5 C8 C4 C7 C3 Quick Start List for Platform Evaluation module preparations Figure 2–2. Module Preparation VDD GND R HP ROUT+ + C10 GND GND ROUT– R LINE– SHUTDOWN R IN+ HP/LINE SE/BTL S1 13 R1 C11 PCBEEP C1 12 U1 C2 TEXAS 11 INSTRUMENTS 14 R2 SHUTDOWN L IN+ L LINE– LOUT– GND + C13 GND L HP SLOP275 LOUT+ VDD GND TPA00242 EVM Board Table 2–4. Typical TPA0242 EVM Jumper Settings EVM S3 TPA0242 OFF Note: ON = Shunt installed, OFF = Open 11) To allow the module SE/BTL con
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S4 S3 S2 C12 R4 R3 C6 C9 C5 C8 C4 C7 C3 Quick Start List for Stand-Alone 2.3 Quick Start List for Stand-Alone Follow these steps to use the TPA0242 EVM stand-alone or when connecting it into existing circuits or equipment. Connections to the TPA0242 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 2–3 and details appear in Chapter 3.
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Quick Start List for Stand-Alone Evaluation module preparations 6) To allow the module SE/BTL control input to switch the amplifier IC between single ended (SE) and bridge-tied load (BTL) output modes, set output mode jumper S3 to OFF. To keep the module amplifier IC in the single-ended output mode regardless of the control input state, set jumper S3 to ON. 7) To allow the module HP/LINE control input to switch the amplifier IC between using the HP pins and the LINE pins as the signal inputs,
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Chapter 3 Details This chapter provides details on the TPA0242 IC, the evaluation module, and the steps in the Quick-Start List, additional application information, and a parts list for the TPA0242 evaluation module. Topic Page 3.1 Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–2 3.2 The TPA0242 Audio Power Amplifier Evaluation Module . . . . . . . . . 3–3 3.3 Using the TPA0242 EVM With the Plug-N-Play Evaluation Platform . .
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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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S4 S3 S2 C12 R4 R3 C6 C9 C5 C8 C4 C7 C3 The TPA0242 Audio Power Amplifier Evaluation Module 3.2 The TPA0242 Audio Power Amplifier Evaluation Module The TPA0242 audio power amplifier evaluation module is powered by a TPA0242 stereo power amplifier capable of delivering greater than 2 W of continuous power per channel into 3-W loads. The amplifier IC can be operated in either the BTL or single-ended output mode. The evaluation module includes control inputs for shutdown, selection between two sets
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The TPA0242 Audio Power Amplifier Evaluation Module Figure 3–3. TPA0242 EVM Schematic Diagram R LINE – R2 C1 50 kW 1 24 R1 0.47 m F V GND GND DD 100 kW TPA0242 CW V DD 2 23 S3 PCB ENABLE RLINEIN SHUTDOWN TP1 HP/LINE S1 3 22 CCW VOLUME SHUTDOWN SHUTDOWN 4 21 S4 LOUT+ ROUT+ R OUT + C3 SE/BTL L OUT + 5 20 0.47 m F LLINEIN RHPIN R HP L LINE – C7 0.47 m F 6 19 L HP LHPIN V C4 R3 DD C8 0.47 m F 0 W 0.47 m F 7 18 V PV PV DD DD DD C12 V DD C6 8 17 10 m F C10 RIN CLK C5 GND 10 m F 47 nF 0.1 m F 9 16 LOUT
