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TPA0122

Audio Power Amplifier

Evaluation Module

June 1999

Mixed-Signal Products

User’s Guide

SLOU043

Содержание TPA0122

Страница 1: ...TPA0122 Audio Power Amplifier Evaluation Module June 1999 Mixed Signal Products User s Guide SLOU043...

Страница 2: ...ONDUCTOR 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 WARRANT...

Страница 3: ...s 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 devic...

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 TPA0122 EVM With the Plug N Play Evaluation Platform 3...

Страница 6: ...Headphone Plug 3 15 3 9 TPA0122 EVM Connected for Stereo BTL Output 3 16 3 10 TPA0122 EVM Connected for Stereo Single Ended Output 3 17 Tables 2 1 Typical TI Plug N Play Platform Jumper and Switch Set...

Страница 7: ...TPA0122 audio amplifier evaluation module SLOP206 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...

Страница 8: ...he TI Plug N Play Audio Amplifier Evaluation Platform J Evaluation module is designed to simply plug into the platform automatically making all signal control and power connections J Platform provides...

Страница 9: ...amplifier evaluation platform or to be wired directly into existing circuits and equipment when used stand alone The platform has room for a single TPA0122 evaluation module and is a convenient vehicl...

Страница 10: ...1 4 Introduction...

Страница 11: ...switch and jumper settings shown in Table 2 1 are typical for the TPA0122 EVM and will cause the TPA0122 to switch to single ended output mode when a plug is inserted into platform headphone jack J10...

Страница 12: ...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 J...

Страница 13: ...e 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 TPA0122 EVM JP6 JP7 JP8 S2 S3 P N P Platform Mode X Hi Note 2 U2...

Страница 14: ...mper S4 to OFF To keep the module amplifier IC in the single ended output mode regardless of the control input state set jumper S4 to ON 12 Use jumpers S2 and S3 to set the gain when the module is in...

Страница 15: ...wer 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...

Страница 16: ...module gain is 1 in SE mode Table 2 6 TPA0122 EVM Gain Settings S2 S3 OUTPUT MODE GAIN V V OFF OFF BTL 2 OFF ON BTL 6 ON OFF BTL 12 ON ON BTL 24 X X SE 1 Note ON Shunt installed OFF Open X Don t care...

Страница 17: ...on information and a parts list for the TPA0122 evaluation module Topic Page 3 1 Precautions 3 2 3 2 The TPA0122 Audio Power Amplifier Evaluation Module 3 3 3 3 Using the TPA0122 EVM With the Plug N P...

Страница 18: ...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...

Страница 19: ...ired 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...

Страница 20: ...face 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 include...

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 TPA0122 IC monitors this input when ope...

Страница 22: ...hing else being equal the module input signal level should be as high as possible without clipping or overloading the TPA0122 input and the TPA0122 gain should be kept as low as possible 3 2 3 Differe...

Страница 23: ...n 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 operat...

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...

Страница 25: ...r See Figure 3 5 In typical applications some or all of the jumper functions are controlled by the system microcontroller or external logic Figure 3 5 TPA0122 EVM Jumpers and Switches R5 100 k C12 10...

Страница 26: ...in low keeping the IC in the BTL output mode The TPA0122 amplifier IC has two separate inputs for each channel An internal multiplexor selects which input will be connected to the amplifier based on t...

Страница 27: ...ifier in socket U5 or the signal from the TPA0122 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 positio...

Страница 28: ...mplifier 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 ti...

Страница 29: ...n 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 th...

Страница 30: ...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...

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 outpu...

Страница 32: ...current to overcome the pullup resistor on the module 100 k 3 4 1 TPA0122 EVM Connected for BTL Output Figure 3 9 TPA0122 EVM Connected for Stereo BTL Output Audio Input Right Audio Input Left Externa...

Страница 33: ...Right Audio Input Left 5 V GND ROUT ROUT SE BTL S1 SHUTDOWN GND LOUT LOUT C10 C2 C12 VDD GND L IN GND L LINE L HP VDD GND R HP R LINE GND R IN C9 TPA0122 EVM Board SLOP206 U1 S3 TEXAS INSTRUMENTS R3...

Страница 34: ...nonpolarized 0805 8 Murata GRM40 Y5V474Z16 C9 C12 Capacitor 10 F 6 3 V A 2 Panasonic ECS TOJY106R Digi Key PCS1106CT ND R1 R2 R3 R5 Resistor 100 k 1 8 W 5 0805 4 Panasonic ERJ 6GEYJ104V Digi Key P100...

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