User’s Guide February 2002 Mixed Signal Products SLOU121
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 specified input and output ranges described in the EVM User’s Guide. 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.
Information About Cautions and Warnings Preface Read This First How to Use This Manual This document contains the following chapters: - Chapter 1—Introduction - Chapter 2—Quick Start - Chapter 3—Details - Chapter 4—Reference 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.
Related Documentation From Texas Instruments 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 - TPA6011A4 Stereo 2-W Audio Power Amplifier (literature number SLOS392) This is the data sheet for the TPA6011A4 audio amplifier integrated circuit. FCC Warning This equipment is intended for use in a laboratory test environment only.
Contents Contents 1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.1 Feature Highlights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3 TPA6011A4 EVM Specifications . . . . . . . . . . . .
Contents Figures 1–1 2–1 2–2 2–3 3–1 3–2 3–3 3–4 3–5 3–6 3–7 3–8 3–9 3–10 3–11 4–1 4–2 4–3 The TI TPA6011A4 Audio Amplifier Evaluation Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 Quick Start Platform Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 Module Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4 Quick Start Module Map . . .
Chapter 1 Introduction This chapter provides an overview of the Texas Instruments (TI) TPA6011A4 audio amplifier evaluation module (SLOP389). 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Feature Highlights 1.
Description 1.2 Description The TPA6011A4 stereo 2-W audio power amplifier evaluation module is a complete, 2-W per channel stereo audio power amplifier with dc volume control. It consists of the TI TPA6011A4 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 (see Figure 1–1). Figure 1–1.
1-4 Introduction
Chapter 2 Quick Start The steps in this chapter can be followed to quickly prepare the TPA6011A4 audio amplifier EVM for use. Using the TPA6011A4 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 TPA6011A4 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.
Quick Start List for Platform Figure 2–2. Module Preparation 13 11 12 16 14 17 18 19 Table 2–4. Typical TPA6011A4 EVM Jumper Settings Note: EVM J1 J2 J3 J4 TPA6011A4 OFF OFF ON OFF ON = Shunt installed, OFF = Open 11) 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 J1 to OFF.
Quick Start List for Stand-Alone 17) Adjust the SE (headphone) volume by adjusting potentiometer R6. Turning R6 in the clockwise direction decreases the voltage on the SEDIFF terminal and the SE gain increases. Turning R6 in the counter clockwise direction increases the SEDIFF voltage and decreases the SE volume. 18) Set the maximum possible SE gain by adjusting R7. Turning R7 in the clockwise direction sets the limit higher; turning R7 in the counter clockwise direction lowers the SE gain limit.
Quick Start List for Stand-Alone can be used with a differential or single-ended audio source, but the headphone and line have common positive inputs. 5) Select output mode: a) For BTL output, connect a speaker to the module OUT+ and OUT– pins of each channel, or b) For single-ended output, connect a headphone or a speaker to the module OUT+ and GND pins of each channel through a 33-µF to 1000-µF output-coupling capacitor (see Figure 3–10).
Quick Start List for Stand-Alone of the EVM is provided to monitor the dc voltage. See Table 3–1 for gain settings. 12) Adjust the SE (headphone) volume by adjusting potentiometer R6. Turning R6 in the clockwise direction decreases the voltage on the SEDIFF terminal and the SE gain increases. Turning R6 in the counter clockwise direction increases the SEDIFF voltage and decreases the SE volume. 13) Set the maximum possible SE gain by adjusting R7.
2-8 Quick Start
Chapter 3 Details This chapter provides details on the TPA6011A4 IC, the evaluation module, and the steps in the Quick-Start List, additional application information, and a parts list for the TPA6011A4 evaluation module. Topic Page 3.1 Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–2 3.2 The TPA6011A4 Audio Power Amplifier Evaluation Module . . . . . . . 3–3 3.3 Using the TPA6011A4 EVM With the Plug-N-Play Evaluation Platform . . .
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.
The TPA6011A4 Audio Power Amplifier Evaluation Module 3.2 The TPA6011A4 Audio Power Amplifier Evaluation Module The TPA6011A4 audio power amplifier evaluation module is powered by a TPA6011A4 stereo power amplifier capable of delivering greater than 2 W of continuous power per channel into 3-Ω loads. The amplifier IC can be operated in either the BTL or single-ended output mode.
The TPA6011A4 Audio Power Amplifier Evaluation Module Figure 3–3. TPA6011A4 EVM Schematic Diagram ROUT– ROUT+ 1 GND 2 C10 ROUT– 0.47 µF C11 10 µF 3 C1 0.47 µF R HP 4 C2 0.47 µF R LINE– R IN 5 C3 0.47 µF C7 0.47 µF L LINE– 6 PVDD RHPIN RLINEIN RIN 7 C5 0.47 µF C6 0.47 µF 8 9 10 L HP 11 VDD C9 0.47 µF 12 VDD LIN VDD J1 23 SE/BTL 22 HP/LINE J2 VOLUME SEDIFF SEMAX VDD C4 0.47 µF L IN PGND 24 AGND BYPASS LHPIN SHUTDOWN R2 100 kΩ PGND VOLUME VDD 19 VDD 18 C8 0.
The TPA6011A4 Audio Power Amplifier Evaluation Module In the single-ended mode, the headphone inputs are automatically selected and the speaker load is connected between the OUT+ terminal, through an output coupling capacitor, to system ground. For more information, see the TPA6011A4 amplifier IC data sheet, TI literature number SLOS392. Figure 3–4. TPA6011A4 Amplifier IC L HP MUX L IN+ L LINE– SEDIFF VOLUME SEMAX VOLUME CONTROL FADE R LINE– R IN+ MUX R HP HP/LINE 3.2.
The TPA6011A4 Audio Power Amplifier Evaluation Module SEDIFF and SEMAX pins control the singe-ended gain proportional to the gain set by the voltage on the VOLUME pin. When SEDIFF = 0 V, the difference between the BTL gain and the SE gain is 6 dB. The voltage on the SEDIFF terminal is subtracted from the voltage on the VOLUME terminal and the value is used to determine the SE gain.
The TPA6011A4 Audio Power Amplifier Evaluation Module Table 3–1. DC Volume Control (BTL Mode, VDD = 5 V) VOLUME (PIN 21) FROM (V) TO (V) GAIN OF AMPLIFIER (dB) 0.00 0.26 –85 0.33 0.37 –40 0.44 0.48 –38 0.56 0.59 –36 0.67 0.70 –34 0.78 0.82 –32 0.89 0.93 –30 1.01 1.04 –28 1.12 1.16 –26 1.23 1.27 –24 1.35 1.38 –22 1.46 1.49 –20 1.57 1.60 –18 1.68 1.72 –16 1.79 1.83 –14 1.91 1.94 –12 2.02 2.06 –10 2.13 2.17 –8 2.25 2.28 –6 2.36 2.39 –4 2.47 2.
The TPA6011A4 Audio Power Amplifier Evaluation Module Table 3–2. DC Volume Control (SE Mode, VDD = 5 V) SE_VOLUME(V) = VOLUME(V) – SEDIFF(V) or SEMAX(V) 3.2.4 FROM (V) TO (V) GAIN OF AMPLIFIER (dB) 0.00 0.26 –85 0.33 0.37 –46 0.44 0.48 –44 0.56 0.59 –42 0.67 0.70 –40 0.78 0.82 –38 0.89 0.93 –36 1.01 1.04 –34 1.12 1.16 –32 1.23 1.27 –30 1.35 1.38 –28 1.46 1.49 –26 1.57 1.60 –24 1.68 1.72 –22 1.79 1.83 –20 1.91 1.94 –18 2.02 2.06 –16 2.13 2.17 –14 2.
The TPA6011A4 Audio Power Amplifier Evaluation Module 3.2.5 Depop Circuitry The TPA6011A4 amplifier IC contains internal circuitry to minimize the various transients that might appear at the output during the transition from power off or shutdown to normal operation, or when transitioning between the SE and BTL modes. 3.2.6 BTL Operation To operate in the bridge-tied load output mode, the module SE/BTL control input terminal must be held low.
Using the TPA6011A4 EVM With the Plug-N-Play Evaluation Platform 3.3 Using the TPA6011A4 EVM With the Plug-N-Play Evaluation Platform The TPA6011A4 audio amplifier evaluation module was designed to be used with the TI plug-n-play audio amplifier evaluation platform. It simply plugs into socket U2. The following paragraphs provide additional details for using the TPA6011A4 EVM with the platform. 3.3.
Using the TPA6011A4 EVM With the Plug-N-Play Evaluation Platform Figure 3–6. TPA6011A4 EVM Jumpers and Switches ROUT– ROUT+ 1 GND 2 C10 ROUT– 0.47 µF C11 10 µF 3 C1 0.47 µF R HP 4 C2 0.47 µF R LINE– R IN 5 C3 0.47 µF C7 0.47 µF L LINE– 6 PVDD RHPIN RLINEIN RIN 7 C5 0.47 µF C6 0.47 µF 8 9 10 L HP 11 VDD C9 0.47 µF 12 VDD LIN VDD J1 23 SE/BTL 22 HP/LINE J2 VOLUME SEDIFF SEMAX VDD C4 0.
Using the TPA6011A4 EVM With the Plug-N-Play Evaluation Platform 3.3.2.3 J2 — Input Mode Jumper To force the module amplifier IC to use the HP input regardless of the module control input state, set jumper J2 to ON. Jumper J2 connects the HP/LINE input mode control pin on the amplifier IC directly to VDD, so that when J2 is ON, the IC is held in the HP input mode regardless of the state of the HP/LINE module control input.
Using the TPA6011A4 EVM With the Plug-N-Play Evaluation Platform 3.3.3.1 Signal Conditioning The audio signal from the input jacks can be applied to the signal conditioning socket (U1) if an EVM is installed there, or socket U1 can be bypassed and the audio input signal applied directly to the inputs of the TPA6011A4. - Switch S2 selects signal conditioning or bypasses it. 3.3.3.2 Headphone Output Jack Switch S3 is the source select for the stereo headphone output jack, J10.
Using the TPA6011A4 EVM With the Plug-N-Play Evaluation Platform output mode. When the mode control input is tied to GND, the module operates in the BTL output mode. When this input is tied to VDD, the module operates in the single-ended output mode. In the typical application, output mode switching allows the TPA6011A4 to operate in the BTL output mode for increased power to internal speakers and then switch to single-ended mode to drive headphones when a plug is inserted into the headphone jack. 3.3.4.
Power Requirements - When JP6 is set to mode, use the following JP8 settings for the TPA6011A4: 3.3.5 J To switch the TPA6011A4 amplifier module to the single-ended output mode when a plug is inserted into the headphone jack, jumper JP8 to Hi (this is the typical setting). J To switch the TPA6011A4 amplifier module to the BTL output mode when a plug is inserted into the headphone jack, jumper JP8 to Lo.
Inputs and Outputs 3.3.6 Inputs and Outputs The TI plug-n-play audio amplifier evaluation platform is equipped with several standard conectors for audio inputs and outputs. 3.3.6.1 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 inch) stereo phone jack (J4). Certain signal conditioning and amplifier EVMs, however, may have additional signal input connectors mounted on the module circuit board.
Using the TPA6011A4 EVM Stand-Alone 3.4 Using the TPA6011A4 EVM Stand-Alone Using the TPA6011A4 audio power amplifier evaluation module stand-alone is much the same as using it with the platform. The same 4.5-V to 5.5-V power supply range and the isolated OUT+ and OUT– lines for BTL operation requirement exists. Note that the shutdown signal applied to the EVM SHUTDOWN pin must be able to supply enough current to overcome the pullup resistor on the module (100 kΩ). 3.4.
Using the TPA6011A4 EVM Stand-Alone 3.4.2 TPA6011A4 EVM Connected for Single-Ended Output Figure 3–11. TPA6011A4 EVM Connected for Stereo Single-Ended Output Audio Input (Right) + + 33 µF – 1000 µF 33 µF – 1000 µF Audio Input (Left) 5V Table 3–4.
Chapter 4 Reference The TPA6011A4 EVM board layers, board schematic, and parts list are presented in this chapter. Topic Page 4.1 TPA6011A4 EVM Layers and Board Schematic . . . . . . . . . . . . . . . . . . 4-2 4.2 TPA6011A4 EVM Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TPA6011A4 EVM Layers and Board Schematic 4.1 TPA6011A4 EVM Layers and Board Schematic Figure 4–1. TPA06011A4 EVM Top View Figure 4–2.
TPA6011A4 EVM Layers and Board Schematic Figure 4–3. TPA06011A4 EVM Schematic Diagram ROUT– ROUT+ 1 GND 2 C10 ROUT– 0.47 µF C11 10 µF 3 C1 0.47 µF R HP 4 C2 0.47 µF R LINE– R IN 5 C3 0.47 µF C7 0.47 µF L LINE– 6 PVDD RHPIN RLINEIN RIN 7 C5 0.47 µF C6 0.47 µF 8 9 10 L HP 11 VDD C9 0.47 µF 12 VDD LIN VDD J1 23 SE/BTL 22 HP/LINE J2 VOLUME SEDIFF SEMAX VDD C4 0.47 µF L IN PGND 24 AGND BYPASS LHPIN SHUTDOWN J3 PGND VOLUME VDD 20 VDD 19 VDD 18 GND C8 0.
TPA6011A4 EVM Parts List 4.2 TPA6011A4 EVM Parts List Table 4–1. TPA6011A4 EVM Parts List Description Size EVM Qty. C1, C2, C3, C4, C5, C6, C7, C8, C9, C10 Capacitor, 0.47 µF, 16 V, 80%/–20%, nonpolarized, SMD 0805 10 Murata GRM40-Y5V474Z16 Arrow GRM40-Y5V474Z 016 C11 Capacitor, 10 µF, 6.
