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Chapter Title—Attribute Reference

Preface

Related Documentation From Texas Instruments

J

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.

J

TPA0142 Stereo 2-W Audio Power Amplifier (literature number
SLOS248) This is the data sheet for the TPA0142 audio amplifier
integrated circuit.

FCC Warning

This equipment is intended for use in a laboratory test environment only. It
generates, uses, and can radiate radio frequency energy and has not been
tested for compliance with the limits of computing devices pursuant to subpart
J of part 15 of FCC rules, which are designed to provide reasonable protection
against radio frequency interference. Operation of this equipment in other
environments may cause interference with radio communications, in which
case the user at his own expense will be required to take whatever measures
may be required to correct this interference.

Trademarks

TI is a trademark of Texas Instruments Incorporated.

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Содержание TPA0142

Страница 1: ...TPA0142 Audio Power Amplifier Evaluation Module August 1999 Mixed Signal Products User s Guide SLOU045A ...

Страница 2: ...CONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF DEATH PERSONAL INJURY OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE CRITICAL APPLICATIONS TI SEMICONDUCTOR PRODUCTS ARE NOT DESIGNED AUTHORIZED OR WARRANTED TO BE SUITABLE FOR USE IN LIFE SUPPORT DEVICES OR SYSTEMS OR OTHER CRITICAL APPLICATIONS INCLUSION OF TI PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD TO BE FULLY AT THE CUSTOMER S RISK In order to ...

Страница 3: ...is equipment is intended for use in a laboratory test environment only It generates uses and can radiate radio frequency energy and has not been tested for compliance with the limits of computing devices pursuant to subpart J of part 15 of FCC rules which are designed to provide reasonable protection against radio frequency interference Operation of this equipment in other environments may cause i...

Страница 4: ...iv ...

Страница 5: ... Inputs and Gain 3 5 3 2 3 Differential Input 3 6 3 2 4 Depop Circuitry 3 7 3 2 5 BTL Operation 3 7 3 2 6 Single Ended Operation 3 7 3 3 Using The TPA0142 EVM With the Plug N Play Evaluation Platform 3 8 3 3 1 Installing and Removing EVM Boards 3 8 3 3 2 TPA0142 Module Jumper Settings and Switches 3 9 3 3 3 Signal Routing 3 11 3 3 4 Mute Shutdown Mode 3 12 3 3 5 Power Requirements 3 14 3 3 6 Input...

Страница 6: ... Mute Mode and Polarity Control 3 12 3 8 Typical Headphone Plug 3 15 3 9 TPA0142 EVM Connected for Stereo BTL Output 3 16 3 10 TPA0142 EVM Connected for Stereo Single Ended Output 3 17 Tables 2 1 Typical TI Plug N Play Platform Jumper and Switch Settings for the TPA0142 2 1 2 2 Typical TPA0142 EVM Jumper Settings 2 1 2 3 Platform Jumper and Switch Settings for the TPA0142 2 3 2 4 Typical TPA0142 E...

Страница 7: ... TPA0142 audio amplifier evaluation module SLOP208 It includes a list of EVM features a brief description of the module illustrated with a pictorial diagram and a list of EVM specifications Topic Page 1 1 Feature Highlights 1 2 1 2 Description 1 3 1 3 TPA0142 EVM Specifications 1 3 Chapter 1 ...

Страница 8: ... with the TI plug n play audio amplifier evalu ation platform J Evaluation module is designed to simply plug into the platform automatically making all signal control and power connections J Platform provides flexible power options J Jumpers on the platform select power and module control options J Switches on the platform route signals J Platform provides quick and easy audio input and output con...

Страница 9: ...plifier evaluation platform or to be wired directly into existing circuits and equipment when used stand alone The platform has room for a single TPA0142 evaluation module and is a convenient vehicle for demonstrating TI s audio power amplifier and related evaluation modules The EVMs simply plug into the platform which automatically provides power to the modules interconnects them correctly and co...

Страница 10: ...1 4 Introduction ...

Страница 11: ...platform switch and jumper settings shown in Table 2 1 are typical for the TPA0142 EVM and will cause the TPA0142 to switch to single ended output mode when a plug is inserted into platform headphone jack J10 Table 2 1 Typical TI Plug N Play Platform Jumper and Switch Settings for the TPA0142 EVM JP6 JP7 JP8 S2 S3 P N P Platform Mode X Hi Note 2 U2 U4 Notes 1 X Don t care 2 Set S2 to ON when signa...

Страница 12: ...m or both may result Figure 2 1 Quick Start Platform Map Signal Conditioning CAUTION Do not insert or remove EVM boards with power applied ICC JP4 F1 VR1 R1 JP3 JP2 JP1 AC DC J2 VCC J1 D1 D2 D3 D4 J2 J3 J4 J5 AC DC In VCC In J1 DC SOURCE LED1 VCC LED2 VDD R2 JP5 IDD B1 U6 POWER SUPPLY U3 U4 U5 U1 U2 Audio Power Amps On Off Conditioning S2 J7 J8 Right Out Left Out JP6 Mode Mute Spk U2 U4 JP8 J9 Lef...

Страница 13: ...he headphone jack J10 output will be used set headphone source switch S3 to U2 U4 Table 2 3 Platform Jumper and Switch Settings for the TPA0142 EVM JP6 JP7 JP8 S2 S3 P N P Platform Mode X Hi Note 2 U2 U4 Notes 1 X Don t care 2 Set S2 to ON when signal conditioning board is installed in U1 set S2 to OFF when no signal conditioning board is installed Power supply 7 Select and connect the power suppl...

Страница 14: ... SE and bridge tied load BTL output modes set output mode jumper S3 to OFF To keep the module amplifier IC in the single ended output mode regardless of the control input state set jumper S3 to ON 12 Use potentiometer R2 to set the volume when the module is in the BTL output mode module gain is reduced by 6 dB in SE mode Turn R2 clockwise to increase the volume Power Up 13 Verify correct voltage a...

Страница 15: ... supply 1 Ensure that all external power sources are set to OFF 2 Connect an external regulated power supply set to 5 V to the module VDD and GND pins taking care to observe marked polarity Inputs and outputs 3 Ensure that audio signal source level adjustments are set to minimum 4 Connect the right left positive lead of the audio source to the module R LINE L LINE pins and the negative lead to the...

Страница 16: ...volume when the module is in the BTL output mode module gain is reduced by 6 dB in SE mode Turn R2 clockwise to increase the volume Control inputs 8 Connect control lines to the various module control input pins as needed a SE BTL A high selects the single ended SE output mode a low or float selects the bridge tied load BTL output mode b SHUTDOWN A low shuts down the amplifier IC on the module a h...

Страница 17: ...ion information and a parts list for the TPA0142 evaluation module Topic Page 3 1 Precautions 3 2 3 2 The TPA0142 Audio Power Amplifier Evaluation Module 3 3 3 3 Using the TPA0142 EVM With the Plug N Play Evaluation Platform 3 8 3 4 Using The TPA0142 EVM Stand Alone 3 16 3 5 TPA0142 Audio Power Amplifier Evaluation Module Parts List 3 18 Chapter 3 ...

Страница 18: ...m or both may result Figure 3 1 The TI Plug N Play Audio Amplifier Evaluation Platform Signal Conditioning CAUTION Do not insert or remove EVM boards with power applied ICC JP4 F1 VR1 R1 JP3 JP2 JP1 AC DC J2 VCC J1 D1 D2 D3 D4 J2 J3 J4 J5 AC DC In VCC In J1 DC SOURCE LED1 VCC LED2 VDD R2 JP5 IDD B1 U6 POWER SUPPLY U3 U4 U5 U1 U2 Audio Power Amps On Off Conditioning S2 J7 J8 Right Out Left Out JP6 ...

Страница 19: ...or wired directly into circuits or equipment The module has single in line header connector pins mounted to the under side of the board These pins allow the module to be plugged into the TI platform which automatically makes all the signal input and output power and control connections to the module The module connection pins are on 0 1 inch centers to allow easy use with standard perf board and p...

Страница 20: ...hermal surface mount package and has been designed to operate from low supply voltages between approximately 4 5 V and 5 5 V Typical applications include portable computers and multimedia systems The IC includes two separate amplifier channels each of which can operate in either the bridged tied load BTL mode or the single ended mode as selected by the SE BTL pin In the BTL mode the line inputs ar...

Страница 21: ... be AC grounded through a capacitor If using differential inputs line and headphone inputs must be the same A third input PC BEEP is common to both channels The TPA0142 IC monitors this input when operating in both the active and shutdown modes and automatically switches to this input when a signal is sensed In computer applications for example this allows the normal audio signal music sounds etc ...

Страница 22: ...40 1 06 1 17 2 2 29 2 41 20 3 54 5 85 1 17 1 28 0 2 41 2 52 22 Since the overall gain of the amplifier is set by the internal preamp stage and not by the power amplifier stage the TPA0142 maintains the same total harmonic distortion THD at even the highest gain settings 3 2 3 Differential Input The TPA0142 line inputs allow the use of a single ended or differential audio source The differential in...

Страница 23: ...s in the system The platform provides such isolated output lines from the amplifier EVM sockets directly to separate left and right speaker connectors 3 2 6 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 µF...

Страница 24: ... the proper orientation Evaluation modules are easily removed from the platform by simply prying them up and lifting them out of their sockets Care must be taken however to prevent bending the pins 3 3 1 1 EVM Insertion 1 Remove all power from the evaluation platform 2 Locate socket U2 on the platform 3 Orient the module correctly 4 Carefully align the pins of the module with the socket pin recept...

Страница 25: ...ure 3 5 In typical applications some or all of the jumper functions are controlled by the system microcontroller or external logic Figure 3 5 TPA0142 EVM Jumpers and Switches R4 100 kΩ C12 10 µF GND GND RLINEIN PCB ENABLE SHUTDOWN VOLUME ROUT LOUT ROUT LOUT SE BTL LIN PC BEEP BYPASS GND GND RHPIN LLINEIN VDD LHPIN PVDD PVDD CLK RIN 10 9 12 11 6 5 8 7 2 1 4 3 23 22 21 20 19 18 17 16 15 14 13 24 S1 ...

Страница 26: ...ch input will be connected to the amplifier based on the state of the SE BTL pin on the IC 3 3 2 3 TP1 PCB ENABLE Leave PCB ENABLE test point TP1 tied to ground or floating for normal operation The PCB ENABLE input is active high and is used when the signal level applied to the PC BEEP signal input pin TP2 does not have sufficient peak to peak voltage to trigger the auto detect function When TP1 i...

Страница 27: ...lifier in socket U5 or the signal from the TPA0142 power amplifier installed in socket U2 as determined by the setting of headphone source select switch S3 When S3 is set to the power amplifier position U2 U4 the headphone jack is connected to the TPA0142 power amplifier OUT output lines When a plug is inserted into the jack signals output through J10 are returned to platform ground requiring sing...

Страница 28: ...ifier IC between the bridge tied load BTL output mode and the single ended SE 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 VDD the module operates in the single ended output mode In the typical application output mode switching allows the TPA0142 to operate in the BTL output mode for increased power to internal speaker...

Страница 29: ...in jumper header JP8 on the platform selects the control signal polarity by connecting either the active high or the active low line from the headphone jack to jumper JP6 When JP6 is set to Mute use the following JP8 settings for the TPA0142 J To shut down the TPA0142 amplifier module when a plug is inserted into the headphone jack jumper JP8 to Lo this is the typical setting J To shut down the TP...

Страница 30: ...s full power output peak current draw can be as high as 1 A Any power supply connected to the platform should be capable of providing 1 A of current to avoid clipping of the output signal during peaks Current consumption driving speakers at normal listening levels is typically 0 3 A or less The platform is equipped with overvoltage and reverse polarity supply voltage input protection in the form o...

Страница 31: ... right RCA phono jacks J7 and J9 left and right pairs of compression connectors for stripped speaker wires J8 and optionally through a miniature 1 8 stereo phone jack J10 for headphones The audio output lines from the power amplifiers are separate all the way to the edge of the platform output jacks J7 J8 and J9 the OUT lines from the power amplifier sockets are not tied to each other or to platfo...

Страница 32: ...ly enough current to overcome the pullup resistor on the module 100 kΩ 3 4 1 TPA0142 EVM Connected for BTL Output Figure 3 9 TPA0142 EVM Connected for Stereo BTL Output Audio Input Right Audio Input Left External Shut Down Control active low Right Left 5 V GND ROUT ROUT SE BTL S1 SHUTDOWN GND LOUT LOUT C11 C2 C13 VDD GND L IN GND L LINE L HP VDD GND R HP R LINE GND R IN C10 TPA0142 EVM Board SLOP2...

Страница 33: ... Audio Input Right Audio Input Left 5 V GND ROUT ROUT SE BTL S1 SHUTDOWN GND LOUT LOUT C11 C2 C13 VDD GND L IN GND L LINE L HP VDD GND R HP R LINE GND R IN C10 TPA0142 EVM Board SLOP208 U1 TEXAS INSTRUMENTS R2 R1 TP2 TP1 C1 C12 C6 C5 C4 R3 R4 S3 C7 C8 C9 C3 SHUTDOWN Table 3 3 Typical TPA0142 EVM Jumper Settings for Single Ended Stand Alone EVM S3 TPA0142 ON Note ON Shunt installed OFF Open ...

Страница 34: ... 0805 1 C10 C13 Capacitor 10 µF 6 3 V A 2 Panasonic ECS TOJY106R Digi Key PCS1106CT ND R1 R4 Resistor 100 kΩ 1 8 W 5 0805 2 Panasonic ERJ 6GEYJ104V Digi Key P100KABK ND R3 Resistor 0 Ω 1 8 W 0805 1 Panasonic ERJ 6GEYJ200V Digi Key P02ABK ND R2 Potentiometer 50 kΩ ST SL thru hole 1 Bourns 3362P 1 503 Digi Key 3362P 503 ND S1 Switch momentary SMD 1 Panasonic P8050SCT ND Digi Key P8050SCT ND TP1 TP2 ...

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