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Texas Instruments SLOU020A manual

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Table of contents for the manual

  • Page 1

    2001 Mixed-Signal Products User ’ s Guide SLOU020A[...]

  • Page 2

    IMPORT ANT NOTICE T exas 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 product[...]

  • Page 3

    iii Chapter Title — Attribute Reference Preface 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 A31 1 350-mW Low-V oltage Audio Power Amplifier (literature number S[...]

  • Page 4

    iv[...]

  • Page 5

    Running Title — Attribute Reference v Chapter Title — Attribute Reference Contents 1 Introduction 1-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.1 Feature Highlights 1-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .[...]

  • Page 6

    Running Title — Attribute Reference vi Figures 1 – 1 The TI TP A31 1 MSOP Audio Amplifier Evaluation Module 1-3 . . . . . . . . . . . . . . . . . . . . . . . . . . 2 – 1 Quick Start Platform Map 2-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 – 2 Quick Start Module Map 2-4 . [...]

  • Page 7

    1-1 Introduction Introduction This chapter provides an overview of the T exas Instruments (TI  ) TP A31 1 MSOP audio amplifier evaluation module (SLOP123). It includes a list of EVM features, a brief description of the module illustrated with a pictorial diagram, and a list of EVM specifications. T opic Page 1.1 Feature Highlights 1–2 . . . . [...]

  • Page 8

    Feature Highlights 1-2 Introduction 1.1 Feature Highlights The TI TP A31 1 MSOP audio amplifier evaluation module and the TI plug-n-play audio amplifier evaluation platform include the following features: TP A31 1 Low-V oltage Audio Power Amplifier Evaluation Module Single channel, bridge-tied load (BTL) or single-ended operation 3.3-V and 5-V oper[...]

  • Page 9

    Description 1-3 Introduction 1.2 Description The TP A31 1 MSOP audio power amplifier evaluation module is a complete, low-power single-channel audio power amplifier . It consists of the TI TP A31 1 350-mW low-voltage audio power amplifier IC in a very small MSOP package, along with a small number of other parts mounted on a circuit board that is ap[...]

  • Page 10

    1-4 Introduction[...]

  • Page 11

    2-1 Quick Start Quick Start The steps in this chapter can be followed to quickly prepare the TP A31 1 MSOP audio amplifier EVM for use. Using the TP A31 1 MSOP 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.[...]

  • Page 12

    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 13

    Quick Start List for Platform 2-3 Quick Start 2.2 Quick Start List for Platform Follow these steps when using the TP A31 1 MSOP 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 details appear in [...]

  • Page 14

    Quick Start List for Stand-Alone 2-4 Quick Start 2.3 Quick Start List for Stand-Alone Follow these steps to use the TP A31 1 MSOP EVM stand-alone or when connecting it into existing circuits or equipment. Connections to the TP A31 1 MSOP module header pins can be made via individual sockets, wire-wrapping, or soldering to the pins, either on the to[...]

  • Page 15

    3-1 Details Details This chapter provides details on the TP A31 1 IC, the evaluation module, and the steps in the Quick-Start List, additional application information, and a parts list for the TP A31 1 MSOP evaluation module. T opic Page 3.1 Precautions 3 – 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [...]

  • Page 16

    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 17

    The TP A31 1 MSOP Audio Power Amplifier Evaluation Module 3-3 Details 3.2 The TP A31 1 MSOP Audio Power Amplifier Evaluation Module The TP A31 1 MSOP audio power amplifier evaluation module is powered by a TP A31 1 350-mW low-power audio amplifier IC, includes a shutdown control signal input with onboard switch, and can be operated in either the BT[...]

  • Page 18

    The TP A31 1 MSOP Audio Power Amplifier Evaluation Module 3-4 Details 3.2.1 TP A31 1 Audio Amplifier IC The TP A31 1 audio amplifier IC is a CMOS device intended primarily for bridge- tied load (BTL) operation in battery-powered applications. It is supplied in a very small surface-mount package and has been designed to operate from low supply volta[...]

  • Page 19

    The TP A31 1 MSOP Audio Power Amplifier Evaluation Module 3-5 Details 3.2.3 SIngle-Ended Operation For single-ended operation, the module SE/BTL control input pin must be held high. The speaker (or headphone) load is connected to the module OUT+ output pin through a coupling capacitor , and to platform/system ground. A 470 - µ F electrolytic coupl[...]

  • Page 20

    Using The TP A31 1 MSOP EVM With the Plug-N-Play Evaluation Platform 3-6 Details 3.3 Using The TP A31 1 MSOP EVM With the Plug-N-Play Evaluation Platform The TP A31 1 MSOP audio amplifier evaluation module was designed to be used with the TI plug-n-play audio amplifier evaluation platform. It simply plugs into socket U3 or U4. The following paragra[...]

  • Page 21

    Using The TP A31 1 MSOP EVM With the Plug-N-Play Evaluation Platform 3-7 Details 3.3.2 Signal Routing Signal flow on the platform is controlled by two signal routing switches, as shown in Figure 3 – 5. Figure 3 – 5. Platform Signal Routing and Outputs U1 Signal Conditioning On Off U5 Stereo Headphone Amplifier S2 R L R L L U5 U2 – U4 S3 J10 H[...]

  • Page 22

    Using The TP A31 1 MSOP EVM With the Plug-N-Play Evaluation Platform 3-8 Details 3.3.3 Mute/Mode The TP A31 1 MSOP EVM is equipped with a mute (shutdown) control input pin. When this input is tied to V DD , the TP A31 1 amplifier IC on the module shuts down and assumes an ultralow-power mode. When the EVM control input is tied to GND or allowed to [...]

  • Page 23

    Using The TP A31 1 MSOP EVM With the Plug-N-Play Evaluation Platform 3-9 Details 3.3.3.2 Mute/Mode Select (JP6) A 3-pin jumper header (JP6) on the platform, functioning as a SPDT switch, routes the control signal from the headphone jack to either the mute control input pin or the mode control input pin of the evaluation module. T o mute the TP A31 [...]

  • Page 24

    Power Requirements 3-10 Details 3.3.4 Power Requirements The TP A31 1 MSOP audio power amplifier evaluation module can operate from any voltage between approximately 2.5 V and 5.5 V ; however , the TP A31 1 amplifier IC on the module is characterized for operation at 3.3 V and 5 V . For best performance (highest output power with lowest distortion)[...]

  • Page 25

    Inputs and Outputs 3-1 1 Details 3.3.5 Inputs and Outputs The TI plug-n-play audio amplifier evaluation platform is equipped with several standard conectors for audio inputs and outputs. 3.3.5.1 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 ″ ) stereo phone jack (J4[...]

  • Page 26

    Using The TP A31 1 MSOP EVM Stand-Alone 3-12 Details 3.4 Using The TP A31 1 MSOP EVM Stand-Alone Using the TP A31 1 MSOP audio power amplifier evaluation module stand-alone is much the same as using it with the platform. The same 2.5-V to 5.5-V power supply range and the isolated OUT+ and OUT – lines for BTL operation requirement exists. Note tha[...]

  • Page 27

    Using The TP A31 1 MSOP EVM Stand-Alone 3-13 Details 3.4.2 TP A31 1 MSOP EVM Connected for Single-Ended Output Figure 3 – 9. TP A31 1 MSOP EVM Connected for Stereo Single-Ended Output 33 µ F – 1000 µ F + + 33 µ F – 1000 µ F 5 VDC Audio Input (Right) 5 VDC Audio Input (Left) External Mute Control (active high) GND OUT+ IN+ GND Vdd GND U1 ?[...]

  • Page 28

    TP A31 1 MSOP Audio Power Amplifier Evaluation Module Parts List 3-14 Details 3.5 TP A31 1 MSOP Audio Power Amplifier Evaluation Module Parts List T able 3 – 1. TP A31 1 MSOP EVM Parts List Ref. Description Size EVM Qty . Manufacturer/ Part Number V endor Number C5 Capacitor , 10 µ F , 6.3 V A 1 Panasonic ECS-TOJY106R Digi-Key PCS1 106CT -ND C1,[...]