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Texas Instruments SLOU121 manual

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Table of contents for the manual

  • Page 1

           February 2002 Mixed Signal Products User ’ s Guide SLOU121[...]

  • Page 2

    IMPORT ANT NOTICE T exas 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 orde[...]

  • Page 3

    EVM IMPORT ANT NOTICE T exas 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 EV ALUA TION PURPOSES ONL Y 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[...]

  • Page 4

    EVM W ARNINGS 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 p[...]

  • Page 5

    Information About Cautions and Warnings v 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 [...]

  • Page 6

    Related Documentation From T exas Instruments vi Related Documentation From T exas Instruments - TI Plug-N-Play Audio Amplifier Evaluation Platform (literature number SLOU01 1) provides detailed information on the evaluation platform and its use with TI audio evaluation modules - TP A601 1A4 Stereo 2-W Audio Power Amplifier (literature number SLOS3[...]

  • Page 7

    Contents vii Contents 1 Introduction 1-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.1 Feature Highlights 1-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2 Description 1-3 . . . . [...]

  • Page 8

    Contents viii Figures 1 – 1 The TI TP A601 1A4 Audio Amplifier Evaluation Module 1-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 – 1 Quick Start Platform Map 2-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 – 2 Module Preparation 2-4 . . . . . . . . . . . . . . .[...]

  • Page 9

    1-1 Introduction This chapter provides an overview of the T exas Instruments (TI) TP A601 1A4 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. T opic Page 1.1 Feature Highlights 1–2 . . . . . . . . . . . . . . . . . . . . . . . . . . .[...]

  • Page 10

    Feature Highlights 1-2 Introduction 1.1 Feature Highlights The TI TP A601 1A4 audio amplifier evaluation module and the TI plug-n-play audio amplifier evaluation platform include the following features: - TP A601 1A4 stereo 2-W audio power amplifier evaluation module J Internal depop circuitry to minimize transients in outputs J Dual channel, bridg[...]

  • Page 11

    Description 1-3 Introduction 1.2 Description The TP A601 1A4 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 TP A601 1A4 stereo 2-W audio power amplifier IC along with a small number of other parts mounted on a circuit board that measures ap[...]

  • Page 12

    1-4 Introduction[...]

  • Page 13

    2-1 Quick Start Quick Start The steps in this chapter can be followed to quickly prepare the TP A601 1A4 audio amplifier EVM for use. Using the TP A601 1A4 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[...]

  • Page 14

    Precautions 2-2 Quick Start 2.1 Precautions Power Supply Input Polarity and Maximum V oltage Always ensure that the polarity and voltage of the external power connected to V CC power input connector J1, J2, and/or V DD power input connector J6 are correct. Overvoltage or reverse-polarity power applied to these terminals can open onboard soldered-in[...]

  • Page 15

    Quick Start List for Platform 2-3 Quick Start 2.2 Quick Start List for Platform Follow these steps when using the TP A601 1A4 EVM with the TI plug-n-play audio amplifier evaluation platform (see the platform user ’ s guide, SLOU01 1, for additional details). Numbered callouts for selected steps are shown in Figure 2 – 1 and Figure 2 – 2, and [...]

  • Page 16

    Quick Start List for Platform 2-4 Quick Start Figure 2 – 2. Module Preparation 13 11 12 16 17 18 19 14 T able 2 – 4. T ypical TP A601 1A4 EVM Jumper Settings EVM J1 J2 J3 J4 TP A601 1A4 OFF OFF ON OFF Note: ON = Shunt installed, OFF = Open 1 1) T o allow the module SE/BTL control input to switch the amplifier IC between single ended (SE) and br[...]

  • Page 17

    Quick Start List for Stand-Alone 2-5 Quick Start 17) Adjust the SE (headphone) volume by adjusting potentiometer R6. T urn- ing R6 in the clockwise direction decreases the voltage on the SEDIFF ter- minal and the SE gain increases. T urning R6 in the counter clockwise di- rection increases the SEDIFF voltage and decreases the SE volume. 18) Set the[...]

  • Page 18

    Quick Start List for Stand-Alone 2-6 Quick Start 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[...]

  • Page 19

    Quick Start List for Stand-Alone 2-7 Quick Start of the EVM is provided to monitor the dc voltage. See T able 3 – 1 for gain settings. 12) Adjust the SE (headphone) volume by adjusting potentiometer R6. T urning R6 in the clockwise direction decreases the voltage on the SEDIFF terminal and the SE gain increases. T urning R6 in the counter clockwi[...]

  • Page 20

    2-8 Quick Start[...]

  • Page 21

    3-1 Details Details This chapter provides details on the TP A601 1A4 IC, the evaluation module, and the steps in the Quick-Start List, additional application information, and a parts list for the TP A601 1A4 evaluation module. T opic Page 3.1 Precautions 3 – 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .[...]

  • Page 22

    Precautions 3-2 Details 3.1 Precautions Power Supply Input Polarity and Maximum V oltage Always ensure that the polarity and voltage of the external power connected to V CC power input connector J1, J2, and/or V DD power input connector J6 are correct. Overvoltage or reverse-polarity power applied to these terminals can open onboard soldered-in fus[...]

  • Page 23

    The TP A601 1A4 Audio Power Amplifier Evaluation Module 3-3 Details 3.2 The TP A601 1A4 Audio Power Amplifier Evaluation Module The TP A601 1A4 audio power amplifier evaluation module is powered by a TP A601 1A4 stereo power amplifier capable of delivering greater than 2 W of continuous power per channel into 3- Ω loads. The amplifier IC can be o[...]

  • Page 24

    The TP A601 1A4 Audio Power Amplifier Evaluation Module 3-4 Details Figure 3 – 3. TP A601 1A4 EVM Schematic Diagram PGND ROUT – PV DD RHPIN RLINEIN RIN V DD LIN LLINEIN LHPIN PV DD LOUT – 1 ROUT+ SE/BTL HP/LINE VOLUME SEDIFF SEMAX AGND BYP ASS F ADE SHUTDOWN LOUT+ PGND 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 V DD J1 R1 10[...]

  • Page 25

    The TP A601 1A4 Audio Power Amplifier Evaluation Module 3-5 Details 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 TP A601 1A4 amplifier IC data sheet, TI literature number SL[...]

  • Page 26

    The TP A601 1A4 Audio Power Amplifier Evaluation Module 3-6 Details 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 termina[...]

  • Page 27

    The TP A601 1A4 Audio Power Amplifier Evaluation Module 3-7 Details T able 3 – 1. DC V olume Control (BTL Mode, V DD = 5 V) VOLUME (PIN 21) GAIN OF AMPLIFIER 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 – 2[...]

  • Page 28

    The TP A601 1A4 Audio Power Amplifier Evaluation Module 3-8 Details T able 3 – 2. DC V olume Control (SE Mode, V DD = 5 V) SE_VOLUME(V) = VOLUME(V) – SEDIFF(V) or SEMAX(V) GAIN OF AMPLIFIER 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 – 3[...]

  • Page 29

    The TP A601 1A4 Audio Power Amplifier Evaluation Module 3-9 Details 3.2.5 Depop Circuitry The TP A601 1A4 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 Oper[...]

  • Page 30

    Using the TP A601 1A4 EVM With the Plug-N-Play Evaluation Platform 3-10 Details 3.3 Using the TP A601 1A4 EVM With the Plug-N-Play Evaluation Platform The TP A601 1A4 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[...]

  • Page 31

    Using the TP A601 1A4 EVM With the Plug-N-Play Evaluation Platform 3-1 1 Details Figure 3 – 6. TP A601 1A4 EVM Jumpers and Switches PGND ROUT – PV DD RHPIN RLINEIN RIN V DD LIN LLINEIN LHPIN PV DD LOUT – 1 ROUT+ SE/BTL HP/LINE VOLUME SEDIFF SEMAX AGND BYP ASS F ADE SHUTDOWN LOUT+ PGND 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 [...]

  • Page 32

    Using the TP A601 1A4 EVM With the Plug-N-Play Evaluation Platform 3-12 Details 3.3.2.3 J2 — Input Mode Jumper T o 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 DD , so that when J2 is ON, [...]

  • Page 33

    Using the TP A601 1A4 EVM With the Plug-N-Play Evaluation Platform 3-13 Details 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 TP A601 1A4. - Switch S2 s[...]

  • Page 34

    Using the TP A601 1A4 EVM With the Plug-N-Play Evaluation Platform 3-14 Details 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 DD , the module operates in the single-ended output mode. In the typical application, output mode switching allows the TP A601 1A4 to operat[...]

  • Page 35

    Power Requirements 3-15 Details - When JP6 is set to mode, use the following JP8 settings for the TP A601 1A4: J T o switch the TP A601 1A4 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 T o switch the TP A601 1A4 amplifier module to the BTL output [...]

  • Page 36

    Inputs and Outputs 3-16 Details 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 TP A601 1A4 EVM Stand-Alone 3-17 Details 3.4 Using the TP A601 1A4 EVM Stand-Alone Using the TP A601 1A4 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 [...]

  • Page 38

    Using the TP A601 1A4 EVM Stand-Alone 3-18 Details 3.4.2 TP A601 1A4 EVM Connected for Single-Ended Output Figure 3 – 1 1. TP A601 1A4 EVM Connected for Stereo Single-Ended Output + + Audio Input (Right) Audio Input (Left) 5 V 33 µ F – 1000 µ F 33 µ F – 1000 µ F T able 3 – 4. T ypical TP A601 1A4 EVM Jumper Settings for Single-Ended Sta[...]

  • Page 39

    4-1 Reference Reference The TP A601 1A4 EVM board layers, board schematic, and parts list are pres- ented in this chapter . T opic Page 4.1 TP A601 1A4 EVM Layers and Board Schematic 4-2 . . . . . . . . . . . . . . . . . . 4.2 TP A601 1A4 EVM Parts List 4-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Chapter 4[...]

  • Page 40

    TP A601 1A4 EVM Layers and Board Schematic 4-2 Reference 4.1 TP A601 1A4 EVM Layers and Board Schematic Figure 4 – 1. TP A0601 1A4 EVM T op View Figure 4 – 2. TP A0601 1A4 EVM Bottom View[...]

  • Page 41

    TP A601 1A4 EVM Layers and Board Schematic 4-3 Reference Figure 4 – 3. TP A0601 1A4 EVM Schematic Diagram PGND ROUT – PV DD RHPIN RLINEIN RIN V DD LIN LLINEIN LHPIN PV DD LOUT – 1 ROUT+ SE/BTL HP/LINE VOLUME SEDIFF SEMAX AGND BYP ASS F ADE SHUTDOWN LOUT+ PGND 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 V DD J1 R1 100 k Ω V [...]

  • Page 42

    TP A601 1A4 EVM Parts List 4-4 Reference 4.2 TP A601 1A4 EVM Parts List T able 4 – 1. TP A601 1A4 EVM Parts List Reference Description Size EVM Qty . Manufacturer/ Part Number Digi-Key Number C1, C2, C3, C4, C5, C6, C7, C8, C9, C10 Capacitor , 0.47 µ F , 16 V , 80%/ – 20%, nonpolarized, SMD 0805 10 Murata GRM40-Y5V474Z16 Arrow GRM40-Y5V474Z 01[...]