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Summary of Contents for Texas Instruments SLOU121
- Page 1 TPA6011A4 Audio Power Amplifier Evaluation Module User’s Guide February 2002 Mixed Signal Products SLOU121...
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Page 2: 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. -
Page 3: Evm Important Notice
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. As such, the goods being provided may not be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including product safety measures typically found in the end product incorporating the goods. -
Page 4: Evm Warnings And Restrictions
EVM schematic located in the EVM User’s Guide. When placing measurement probes near these devices during operation, please be aware that these devices may be very warm to the touch. Copyright 2002, Texas Instruments Incorporated Mailing Address: Texas Instruments Post Office Box 655303... -
Page 5: 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. - Page 6 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 inte- grated circuit.
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Page 7: Table Of Contents
Introduction ..............Feature Highlights . - Page 8 Contents Figures 1–1 The TI TPA6011A4 Audio Amplifier Evaluation Module 2–1 Quick Start Platform Map ............2–2 Module Preparation .
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Page 9: 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 Feature Highlights .......... -
Page 10: Feature Highlights
Feature Highlights 1.1 Feature Highlights The TI TPA6011A4 audio amplifier evaluation module and the TI plug-n-play audio amplifier evaluation platform include the following features: TPA6011A4 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 (SE) operation 2 W per channel output power into 3 Low current consumption in shutdown mode (20 A) -
Page 11: 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). - Page 12 Introduction...
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Page 13: 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. -
Page 14: Precautions
Precautions 2.1 Precautions Power Supply Input Polarity and Maximum Voltage Always ensure that the polarity and voltage of the external power connected to V 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. -
Page 15: 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. -
Page 16: Module Preparation
Quick Start List for Platform Figure 2–2. Module Preparation Table 2–4. Typical TPA6011A4 EVM Jumper Settings TPA6011A4 Note: 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. -
Page 17: Quick Start List For Stand-Alone
17) Adjust the SE (headphone) volume by adjusting potentiometer R6. Turn- ing R6 in the clockwise direction decreases the voltage on the SEDIFF ter- minal and the SE gain increases. Turning R6 in the counter clockwise di- rection increases the SEDIFF voltage and decreases the SE volume. 18) Set the maximum possible SE gain by adjusting R7. - Page 18 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, b) For single-ended output, connect a headphone or a speaker to the module OUT+ and GND pins of each channel through a 33- F to...
- Page 19 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.
- Page 20 Quick Start...
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Page 21: 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 Precautions ..........The TPA6011A4 Audio Power Amplifier Evaluation Module Using the TPA6011A4 EVM With the Plug-N-Play Evaluation Platform... -
Page 22: Precautions
Precautions 3.1 Precautions Power Supply Input Polarity and Maximum Voltage Always ensure that the polarity and voltage of the external power connected to V 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. -
Page 23: 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- loads. The amplifier IC can be operated in either the BTL or single-ended output mode. -
Page 24: Tpa6011A4 Audio Amplifier Ic
The TPA6011A4 Audio Power Amplifier Evaluation Module Figure 3–3. TPA6011A4 EVM Schematic Diagram 10 F 0.47 F 0.47 F R HP 0.47 F R LINE– 0.47 F R IN V DD 0.47 F 0.47 F L IN 0.47 F L LINE– 0.47 F L HP V DD... -
Page 25: Inputs And Gain
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. -
Page 26: Block Diagram Of Se Volume Control
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. -
Page 27: Dc Volume Control (Btl Mode, Vdd = 5 V)
Table 3–1. DC Volume Control (BTL Mode, V FROM (V) The TPA6011A4 Audio Power Amplifier Evaluation Module = 5 V) VOLUME (PIN 21) GAIN OF AMPLIFIER GAIN OF AMPLIFIER TO (V) 0.00 0.26 0.33 0.37 0.44 0.48 0.56 0.59 0.67 0.70 0.78 0.82... -
Page 28: Differential Input
The TPA6011A4 Audio Power Amplifier Evaluation Module Table 3–2. DC Volume Control (SE Mode, V SE_VOLUME(V) = VOLUME(V) – SEDIFF(V) or SEMAX(V) FROM (V) 0.00 0.33 0.44 0.56 0.67 0.78 0.89 1.01 1.12 1.23 1.35 1.46 1.57 1.68 1.79 1.91 2.02 2.13 2.25... -
Page 29: Depop Circuitry
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... -
Page 30: Using The Tpa6011A4 Evm With The Plug-N-Play Evaluation Platform
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. -
Page 31: Tpa6011A4 Amplifier Ic
Figure 3–6. TPA6011A4 EVM Jumpers and Switches 10 F 0.47 F 0.47 F R HP 0.47 F R LINE– 0.47 F R IN V DD 0.47 F 0.47 F L IN 0.47 F L LINE– 0.47 F L HP V DD 0.47 F 3.3.2.1 S1 —... -
Page 32: Signal Routing
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 V regardless of the state of the HP/LINE module control input. -
Page 33: Mute (Shutdown)/Mode
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. -
Page 34: Mute/Mode And Polarity Control
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 V 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... -
Page 35: Power Requirements
When JP6 is set to mode, use the following JP8 settings for the TPA6011A4: 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). To switch the TPA6011A4 amplifier module to the BTL output mode when a plug is inserted into the headphone jack, jumper JP8 to Lo. -
Page 36: Inputs And Outputs
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). -
Page 37: 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. -
Page 38: Tpa6011A4 Evm Connected For Single-Ended Output
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) Audio Input (Left) Table 3–4. Typical TPA6011A4 EVM Jumper Settings for Single-Ended Stand-Alone TPA6011A4 Note: ON = Shunt installed OFF = Open 3-18 33 F –... -
Page 39: Reference
The TPA6011A4 EVM board layers, board schematic, and parts list are pres- ented in this chapter. Topic TPA6011A4 EVM Layers and Board Schematic TPA6011A4 EVM Parts List ........Chapter 4 Reference Page... -
Page 40: Tpa6011A4 Evm Layers And Board Schematic
TPA6011A4 EVM Layers and Board Schematic 4.1 TPA6011A4 EVM Layers and Board Schematic Figure 4–1. TPA06011A4 EVM Top View Figure 4–2. TPA06011A4 EVM Bottom View Reference... -
Page 41: Tpa06011A4 Evm Schematic Diagram
Figure 4–3. TPA06011A4 EVM Schematic Diagram 10 F 0.47 F 0.47 F R HP 0.47 F R LINE– 0.47 F R IN V DD 0.47 F 0.47 F L IN 0.47 F L LINE– 0.47 F L HP V DD 0.47 F TPA6011A4 EVM Layers and Board Schematic ROUT+... -
Page 42: Tpa6011A4 Evm Parts List
TPA6011A4 EVM Parts List 4.2 TPA6011A4 EVM Parts List Table 4–1. TPA6011A4 EVM Parts List Reference Description C1, C2, C3, Capacitor, 0.47 F, 16 V, C4, C5, C6, 80%/–20%, nonpolarized, C7, C8, C9, Capacitor, 10 F, 6.3 V, R1, R2, R3, Resistor, 100 k , 1/10 W, 5%, SMD R5, R6, R7...
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