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Texas Instruments TPA0253 manual

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Table of contents for the manual

  • Page 1

           December 2000 Mixed-Signal Products User ’ s Guide SLOU100[...]

  • 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 A0253 1-W Mono Audio Power Amplifier With Headphone Drive (lit[...]

  • Page 4

    iv[...]

  • Page 5

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

  • Page 6

    vi[...]

  • Page 7

    1-1 Introduction Introduction This chapter provides an overview of the T exas Instruments (TI) TP A0253 audio amplifier evaluation module (SLOP270). 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 A0253 audio amplifier evaluation module and the TI plug-n-play audio amplifier evaluation platform include the following features:  TP A0253 mono 1-W audio power amplifier with stereo headphone drive evaluation module  Single channel, bridge-tied load (BTL) or dual-channel s[...]

  • Page 9

    Description 1-3 Introduction 1.2 Description The TP A0253 audio power amplifier evaluation module is a complete 1-watt mono audio power amplifier with stereo headphone drive. It consists of the TI TP A0253 mono 1-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 b[...]

  • Page 10

    1-4 Introduction[...]

  • Page 11

    2-1 Operation Quick start lists in this chapter contain steps that can be followed to quickly prepare the TI plug-n-play audio amplifier evaluation platform for use with the TP A0253 audio amplifier EVM, or to connect the TP A0253 audio amplifier EVM for stand-alone operation. Using the TP A0253 audio amplifier evaluation module with the TI evaluat[...]

  • Page 12

    2-2 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 fuses and cause other d[...]

  • Page 13

    2-3 2.2 Quick Start List for Platform Follow these steps when using the TP A0253 EVM with the TI plug-n-play audio amplifier evaluation platform (see the platform user ’s guide, SLOU01 1, for additional details). T able 2–1 shows typical platform jumper and switch settings and numbered callouts for selected steps appear in Figure 2–1. T able [...]

  • Page 14

    2-4 2.3 Quick Start List for Stand-Alone Follow these steps to use the TP A0253 EVM stand-alone or when connecting it into existing circuits or equipment. Connections to the TP A0253 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 c[...]

  • Page 15

    2-5 2.4 Stand-Alone Connection Diagrams The power supply range is 2.5 V to 5.5 V and isolated RO/MO+ and LO/MO– lines for BTL operation are required. Note that the source of any shutdown signal applied to the EVM SHUTDOWN pin must be able to sink the current flowing through the pullup resistor on the module (100 k Ω ) when the pin is held low .[...]

  • Page 16

    2-6 2.4.2 TP A0253 EVM Connected for Single-Ended Stereo Headphone Output Figure 2–4 shows a TP A0253 EVM connected for single-ended stereo headphone operation. Figure 2–4. TP A0253 EVM Connected for Single-Ended Stereo Headphone Output GND LO/MO+ SHUTDOWN GND C3 VDD GND GND LIN VDD GND GND RIN TP A0253 EVM Board U1 + TEXAS INSTRUMENTS 2000 R2 [...]

  • Page 17

    2-7 2.5 Reference This section includes the TP A0253 EVM schematic, the EVM parts list, and the module PCB layers. 2.5.1 EVM Schematic Figure 2–5 shows the TP A0253 EVM schematic. Figure 2–5. TP A0253 EVM Schematic Diagram C4 1 µ F R1 100 k Ω TP A0253 S1 R O /M O + NO SD FIL T_CAP BYP ASS L O /M O L IN V DD ST/M 10 9 8 7 1 2 3 4 V DD STEREO/[...]

  • Page 18

    2-8 2.5.2 EVM Parts List T able 2–2 is the TP A0253 EVM parts list. T able 2–2. TP A0253 EVM Parts List Ref. Description Size EVM Qty . Manufacturer/ Part Number V endor Number C1, C4 Capacitor , 1 µ F @ 16 V , +80%/–20%, nonpolarized 1206 2 Murata GRM42-6Y5V105Z16BL Arrow GRM426Y5V105Z 016 C2, C5, C6 Capacitor , 0.47 µ F @ 16 V +80%/–20%[...]

  • Page 19

    2-9 2.5.3 Module PCB Layers The following illustrations depict the TP A0253 EVM PCB layers and silkscreen. These drawings are not to scale. Gerber plots can be obtained from any TI Sales Office. Figure 2–6. TP A0253 EVM PCB Figure 2–7. TP A0253 EVM Silkscreen[...]

  • Page 20

    2-10 Figure 2–8. TP A0253 EVM Bottom Layer[...]