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TPA122 MSOP

Audio Power Amplifier

Evaluation Module

1998

Mixed-Signal Products

User’s Guide

SLOU025

Содержание SLOU025

Страница 1: ...TPA122 MSOP Audio Power Amplifier Evaluation Module 1998 Mixed Signal Products User s Guide SLOU025...

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: ...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 devi...

Страница 4: ...iv...

Страница 5: ...2 The TPA122 MSOP Audio Amplifier Evaluation Module 3 3 3 2 1 TPA122 Audio Amplifier IC 3 4 3 2 2 Module Gain 3 5 3 2 3 Shutdown 3 5 3 3 Using The TPA122 MSOP EVM With The Plug N Play Evaluation Platf...

Страница 6: ...3 3 3 TPA122 MSOP EVM Schematic Diagram 3 3 3 4 TPA122 Audio Amplifier IC 3 4 3 5 Platform Signal Routing and Outputs 3 7 3 6 Mute Polarity Control 3 8 3 7 Typical Headphone Plug 3 10 3 8 TPA122 MSOP...

Страница 7: ...TPA122 MSOP Audio Amplifier Evaluation Module SLOP125 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...

Страница 8: ...cuitry Quick and Easy Configuration with the TI Plug N Play Audio Amplifier Evaluation Platform J Evaluation module is designed to simply plug into the platform automatically making all signal control...

Страница 9: ...e module circuit board to allow the EVM to be plugged into the TI Plug N Play Audio Amplifier Evaluation Platform or to be wired directly into existing circuits and equipment when used stand alone The...

Страница 10: ...1 4 Introduction...

Страница 11: ...d can be wired directly into existing circuits or equipment The platform switch and jumper settings shown in Table 2 1 are typical for the TPA122 MSOP EVM and will cause the TPA122 IC to shut down mut...

Страница 12: ...m or both may result Figure 2 1 Quick Start Platform Map 3 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 J...

Страница 13: ...g board is installed in U1 set S2 to OFF when no signal conditioning board is installed Power supply 6 Select and connect the power supply a Connect an external regulated power supply set to a voltage...

Страница 14: ...ode TIAAE Power 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 pola...

Страница 15: ...ormation and a parts list for the TPA122 MSOP evaluation module Topic Page 3 1 Precautions 3 2 3 2 The TPA122 MSOP Audio Power Amplifier Evaluation Module 3 3 3 3 Using The TPA122 MSOP EVM With The Pl...

Страница 16: ...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 17: ...l 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 plug board based prototyping systems Or...

Страница 18: ...Hz to 20 kHz As a headphone driver distortion levels are below 0 4 into 32 loads across the audio band And as a speaker driver distortion levels are below 0 8 into 8 loads across the audio band Typica...

Страница 19: ...gnal level and the TPA122 MSOP module gain should be adjusted to obtain the lowest overall distortion level for a particular overall gain A quick rule of thumb everything else being equal the module i...

Страница 20: ...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...

Страница 21: ...passes signal conditioning 3 3 2 2 Headphone Output Jack Switch S3 is the source select for the stereo headphone output jack J10 The headphone jack is capacitively coupled via 470 F electrolytics It c...

Страница 22: ...ternal switch that changes the state of a pair of control lines when a plug is inserted or removed Figure 3 6 Each control line is pulled down by a 1 k resistor to ground R4 and R5 The switch in the h...

Страница 23: ...m is equipped with overvoltage and reverse polarity supply voltage input protection in the form of fused crowbar circuits VDD voltage applied to platform screw terminals J6 MUST NOT exceed the absolut...

Страница 24: ...e jack J10 Amplified audio output signals from the power amplifiers U2 U4 leave the platform through left and right RCA phono jacks J7 and J9 left and right pairs of compression connectors for strippe...

Страница 25: ...able to supply enough current to overcome the pulldown resistor on the module 20 k 3 4 1 TPA122 MSOP EVM Connected as a Stereo Headphone Amplifier Figure 3 8 TPA122 MSOP EVM Connected as a Stereo Head...

Страница 26: ...F 6 3 V SMD A 1 Panasonic ECS TOJY106R Digi Key PCS1106CT ND R1 R2 R4 Resistor 20 k 1 16 W 5 SMD 0603 3 Panasonic ERJ 3GSYJ203 Digi Key R3 R5 Resistor 80 k 1 16 W 5 SMD 0603 2 Panasonic ERJ 3GSYJ803 D...