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Texas Instruments TPA311 - page 1
2001 Mixed-Signal Products User ’ s Guide SLOU013A ...
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Texas Instruments TPA311 - 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 ...
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Texas Instruments TPA311 - 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 ...
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Texas Instruments TPA311 - page 4
iv ...
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Texas Instruments TPA311 - page 5
Running Title — Attribute Reference v Chapter Title — Attribute Reference Contents 1 Introduction 1-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.1 Feature Highlights 1-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
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Texas Instruments TPA311 - page 6
Running Title — Attribute Reference vi Figures 1 – 1 The TI TP A31 1 Audio Amplifier Evaluation Module 1-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 – 1 Quick Start Platform Map 2-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 – 2 Quick Start Module Map ...
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Texas Instruments TPA311 - page 7
1-1 Introduction Introduction This chapter provides an overview of the T exas Instruments (TI ) TP A31 1 audio amplifier evaluation module (SLOP1 16). 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 . . . . . . ...
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Texas Instruments TPA311 - page 8
Feature Highlights 1-2 Introduction 1.1 Feature Highlights The TI TP A31 1 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 operation ...
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Texas Instruments TPA311 - page 9
Description 1-3 Introduction 1.2 Description The TP A31 1 audio power amplifier evaluation module is a complete, low-pow- er single-channel audio power amplifier . It consists of the TI TP A31 1 350-mW low-voltage audio power amplifier IC along with a small number of other parts mounted on a circuit board that is approximately one and a quarter inc ...
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Texas Instruments TPA311 - page 10
1-4 Introduction ...
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Texas Instruments TPA311 - page 11
2-1 Quick Start Quick Start The steps in this chapter can be followed to quickly prepare the TP A31 1 audio amplifier EVM for use. While using the TP A31 1 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, the aud ...
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Texas Instruments TPA311 - 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 ...
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Texas Instruments TPA311 - page 13
Quick Start List for Platform 2-3 Quick Start 2.2 Quick Start List for Platform Use the following steps when using the TP A31 1 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 ...
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Texas Instruments TPA311 - page 14
Quick Start List for Stand-Alone 2-4 Quick Start 2.3 Quick Start List for Stand-Alone Use the following steps to use the TP A31 1 EVM stand-alone or when connecting it into existing circuits or equipment. Connections to the TP A31 1 module header pins can be made via individual sockets, wire-wrapping, or soldering to the pins, either on the top or ...
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Texas Instruments TPA311 - 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 evaluation module. T opic Page 3.1 Precautions 3 – 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
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Texas Instruments TPA311 - 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 ...
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Texas Instruments TPA311 - page 17
The TP A31 1 Audio Power Amplifier Evaluation Module 3-3 Details 3.2 The TP A31 1 Audio Power Amplifier Evaluation Module The TP A31 1 audio power amplifier evaluation module is powered by a TP A31 1 350-mW low-power audio amplifier IC and includes on-board gain adjustment, a shutdown control signal input with on-board switch, and can be operated i ...
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Texas Instruments TPA311 - page 18
The TP A31 1 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 voltages ( ...
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Texas Instruments TPA311 - page 19
The TP A31 1 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 coupling c ...
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Texas Instruments TPA311 - page 20
Using The TP A31 1 EVM With the Plug-N-Play Evaluation Platform 3-6 Details 3.3 Using The TP A31 1 EVM W ith the Plug-N-Play Evaluation Platform The TP A31 1 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 paragraphs provide ad ...
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Texas Instruments TPA311 - page 21
Using The TP A31 1 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 Headph ...
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Texas Instruments TPA311 - page 22
Using The TP A31 1 EVM With the Plug-N-Play Evaluation Platform 3-8 Details 3.3.3 Mute/Mode The TP A31 1 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 float, amp ...
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Texas Instruments TPA311 - page 23
Using The TP A31 1 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 1 amp ...
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Texas Instruments TPA311 - page 24
Power Requirements 3-10 Details 3.3.4 Power Requirements The TP A31 1 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), the ...
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Texas Instruments TPA311 - 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 ...
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Texas Instruments TPA311 - page 26
Using The TP A31 1 EVM Stand-Alone 3-12 Details 3.4 Using The TP A31 1 EVM Stand-Alone Using the TP A31 1 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 re- quirement exists. Note that the mute si ...
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Texas Instruments TPA311 - page 27
Using The TP A31 1 EVM Stand-Alone 3-13 Details 3.4.2 TP A31 1 EVM Connected for Single-Ended Output Figure 3 – 9. TP A31 1 EVM Connected for Stereo Single-Ended Output 5 VDC Audio Input (Right) 5 VDC Audio Input (Left) External Mute Control (active high) GND 33 µ F – 1000 µ F + + 33 µ F – 1000 µ F C4 R3 IN+ C2 Shutdown R1 R2 C1 C5 C3 OUT ...
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Texas Instruments TPA311 - page 28
TP A31 1 Audio Power Amplifier Evaluation Module Parts List 3-14 Details 3.5 TP A31 1 Audio Power Amplifier Evaluation Module Parts List T able 3 – 1. TP A31 1 EVM Parts List Ref. Description Size EVM Qty . Manufacturer/ Part Number V endor Number R4 T rim Pot, 200 k Ω Cermet ST SL, (through hole) 1 Bourns 3323P-1-204 Digi-Key 3323P-204-ND C5 C ...
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