Texas Instruments TPA102 MSOP, User Manual

Page 1: ...TPA102 MSOP Audio Power Amplifier Evaluation Module May 2001 Mixed Signal Products User s Guide SLOU022A ...

Page 2: ...design TI does not warrant or represent that any license either express or implied is granted under any patent right copyright mask work right or other intellectual property right of TI covering or relating to any combination machine or process in which such products or services might be or are used TI s publication of information regarding any third party s products or services does not constitut...

Page 3: ...odules TPA102 150 mW Stereo Audio Power Amplifier literature number SLOS213 This is the data sheet for the TPA102 audio amplifier integrated circuit This book may contain cautions and warnings This is an example of a caution statement A caution statement describes a situation that could potentially damage your software or equipment This is an example of a warning statement A warning statement desc...

Page 4: ...ompliance 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 in...

Page 5: ...PA102 MSOP Audio Amplifier Evaluation Module 3 3 3 2 1 TPA102 Audio Amplifier IC 3 4 3 2 2 Module Gain 3 5 3 2 3 Shutdown 3 5 3 3 Using the TPA102 MSOP EVM With the Plug N Play Evaluation Platform 3 6 3 3 1 Installing and Removing EVM Boards 3 6 3 3 2 Signal Routing 3 7 3 3 3 Shutdown 3 8 3 3 4 Power Requirements 3 9 3 3 5 Inputs and Outputs 3 10 3 4 Using the TPA102 MSOP EVM Stand Alone 3 11 3 4 ...

Page 6: ...3 3 3 3 TPA102 MSOP EVM Schematic Diagram 3 3 3 4 TPA102 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 TPA102 MSOP EVM Connected as a Stereo Headphone Amplifier 3 11 Tables 2 1 Typical TI Plug N Play Platform Jumper and Switch Settings for the TPA102 MSOP EVM 2 1 2 2 Platform Jumper and Switch Settings for the T...

Page 7: ...Instruments TI TPA102 MSOP audio amplifier evaluation module SLOP125 It includes a list of EVM features a brief illustrated description of the module and a list of EVM specifications Topic Page 1 1 Features 1 2 1 2 Description 1 3 1 3 TPA102 MSOP EVM Specifications 1 3 Chapter 1 ...

Page 8: ...uction circuitry 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 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 provid...

Page 9: ...the 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 platform has room for a single TPA102 evaluation module and is a convenient vehicle for demonstrating TI s audio power amplifier and related evaluation modules The EVMs simply plug into the platfor...

Page 10: ...1 4 Introduction ...

Page 11: ...and can be wired directly into existing circuits or equipment The platform switch and jumper settings shown in Table 2 1 are typical for the TPA102 MSOP EVM and will cause the TPA102 IC to shutdown mute when a plug is removed from platform headphone jack J10 Table 2 1 Typical TI Plug N Play Platform Jumper and Switch Settings for the TPA102 MSOP EVM EVM JP6 JP7 JP8 S2 S3 TPA102 X Lo X Note 2 U5 No...

Page 12: ...rm or both may result Figure 2 1 Quick Start Platform Map 3 1 10 9 8 6b 6b 6a 6b 5 4 6b 2 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 J...

Page 13: ... 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 between 2 5 V and 5 5 V to platform VDD power input connector J6 taking care to observe marked polarity or b Install a 3 V to 5 V voltage regulator EVM SLVP097 or equiv in platform socket U6 Install a...

Page 14: ...er TPA102 is replaced with the code TIAAC 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 polarity Inputs and outputs 3 Ensure that the signal source level is set to minimum 4 Connect the audio source to the module IN1 IN2 and GND pins taking care to observe mar...

Page 15: ...formation and a parts list for the TPA102 MSOP evaluation module Topic Page 3 1 Precautions 3 2 3 2 The TPA102 MSOP Audio Power Amplifier Evaluation Module 3 3 3 3 Using The TPA102 MSOP EVM With the Plug N Play Evaluation Platform 3 6 3 4 Using the TPA102 MSOP EVM Stand Alone 3 11 3 5 TPA102 MSOP Audio Power Amplifier EVM Parts List 3 12 Chapter 3 ...

Page 16: ...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 ...

Page 17: ...put 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 the EVM can be wired directly into existing circuits and equipment when used stand alone The module appears in Figure 3 2 and its schematic is shown in Figure 3 3 Figure 3 2 TPA102 MSOP EVM GND Vo2 C3 IN...

Page 18: ... kHz As a headphone driver distortion levels are below 0 4 into 32 Ω loads across the audio band And as a speaker driver distortion levels are below 0 8 into 8 Ω loads across the audio band Typical applications include portable computers desktop computers personal audio toys games and similar audio applications The IC includes two separate internal amplifiers depop circuitry and a common shutdown ...

Page 19: ...h application Both the module input signal level and the TPA102 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 input signal level should be as high as possible without clipping or overloading the TPA102 input and the TPA102 gain should be kept as low as possible 3 2 3 Shutd...

Page 20: ...r socket and then only with 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 U5 on the platform 3 Orient the module correctly 4 Carefully align the pins of the module...

Page 21: ...ypasses 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 µF electrolytics It can output either the signal from the the TPA102 MSOP headphone amplifier in socket U5 or the signal from power amplifiers installed in socket U2 or in sockets U3 and U4 as determined by the setting ...

Page 22: ...rnal 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 kΩ resistor to ground R4 and R5 The switch in the headphone jack pulls one line or the other up to VDD through a 240 Ω resistor R3 depending on whether or not a plug is inserted in J10 Figure 3 6 Shutdown Polarity Control J10 Headphone Jack R3 240 Ω R4...

Page 23: ...rm 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 absolute maximum rating for the TPA102 amplifier IC installed on the eval uation module 5 5 V or damage to the IC may result In no case should VDD voltage of the incorrect polarity or in excess of 6 1 V be ...

Page 24: ...ne 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 stripped speaker wires J8 and optionally through the headphone jack 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 li...

Page 25: ...e to supply enough current to overcome the pulldown resistor on the module 20 kΩ 3 4 1 TPA102 MSOP EVM Connected as a Stereo Headphone Amplifier Figure 3 8 TPA102 MSOP EVM Connected as a Stereo Headphone Amplifier 33 µF 1000 µF 33 µF 1000 µF 5 VDC Audio Input Right Audio Input Left Shutdown NO GND Vo2 C3 IN2 GND VDD GND IN1 GND U1 R1 R2 C2 R5 S1 Shutdown C4 Vo1 GND C7 C1 TEXAS INSTRUMENTS SLOP125 ...

Page 26: ...r 10 µF 6 3 V SMD A 1 Panasonic ECS TOJY106R Digi Key PCS1106CT ND R1 R2 R5 Resistor 20 kΩ 1 16 W 5 SMD 0603 3 Panasonic ERJ 3GSYJ203 Digi Key R3 R4 Resistor 80 kΩ 1 16 W 5 SMD 0603 2 Panasonic ERJ 3GSYJ803 Digi Key S1 Switch momentary SMD 1 Panasonic P8048SCT ND Digi Key P8048SCT ND U1 IC TPA102 audio amplifier 150 mW 2 channel SMD MSOP 8 1 TI TPA102DGN Terminal post headers 11 Sullins Digi Key S...