background image

EVM IMPORTANT NOTICE

Texas Instruments (TI) provides the enclosed product(s) under the following conditions:

This evaluation kit being sold by TI is intended for use for ENGINEERING DEVELOPMENT OR EVALUATION
PURPOSES ONLY
 and is not considered by TI to be fit for commercial use. As such, the goods being provided
may not be complete in terms of required design-, marketing-, and/or manufacturing-related protective
considerations, including product safety measures typically found in the end product incorporating the goods.
As a prototype, this product does not fall within the scope of the European Union directive on electromagnetic
compatibility and therefore may not meet the technical requirements of the directive.

Should this evaluation kit not meet the specifications indicated in the EVM User’s Guide, the kit may be returned
within 30 days from the date of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE
WARRANTY MADE BY SELLER TO BUYER AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED,
IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY
PARTICULAR PURPOSE.

The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user
indemnifies TI from all claims arising from the handling or use of the goods. Please be aware that the products
received may not be regulatory compliant or agency certified  (FCC, UL, CE, etc.). Due to the open construction
of the product, it is the user’s responsibility to take any and all appropriate precautions with regard to electrostatic
discharge.

EXCEPT TO THE EXTENT OF THE INDEMNITY SET FORTH ABOVE, NEITHER PARTY SHALL BE LIABLE
TO THE OTHER FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.

TI currently deals with a variety of customers for products, and therefore our arrangement with the user is not
exclusive
.

TI assumes no liability for applications assistance, customer product design, software performance, or
infringement of patents or services described herein
.

Please read the EVM User’s Guide and, specifically, the EVM Warnings and Restrictions notice in the EVM
User’s Guide prior to handling the product. This notice contains important safety information about temperatures
and voltages. For further safety concerns, please contact the TI application engineer.

Persons handling the product must have electronics training and observe good laboratory practice standards.

No license is granted under any patent right or other intellectual property right of TI covering or relating to any
machine, process, or combination in which such TI products or services might be or are used.

Mailing Address:

Texas Instruments
Post Office Box 655303
Dallas, Texas 75265

Copyright 

 2004, Texas Instruments Incorporated

Summary of Contents for TPA6120A2

Page 1: ... May 2004 HPA Audio Power User s Guide SLOU169 ...

Page 2: ...tute a license from TI to use such products or services or a warranty or endorsement thereof Use of such information may require a license from a third party under the patents or other intellectual property of the third party or a license from TI under the patents or other intellectual property of TI Reproduction of information in TI data books or data sheets is permissible only if reproduction is...

Page 3: ... handling or use of the goods Please be aware that the products received may not be regulatory compliant or agency certified FCC UL CE etc Due to the open construction of the product it is the user s responsibility to take any and all appropriate precautions with regard to electrostatic discharge EXCEPT TO THE EXTENT OF THE INDEMNITY SET FORTH ABOVE NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR A...

Page 4: ...inty as to the load specification please contact a TI field representative During normal operation some circuit components may have case temperatures greater than 125 C The EVM is designed to operate properly with certain components above 125 C as long as the input and output ranges are maintained These components include but are not limited to linear regulators switching transistors pass transist...

Page 5: ...exas Instruments SLOS431 TPA6120A2 data sheet If you need Assistance Contact your local TI sales representative 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 pr...

Page 6: ...iv ...

Page 7: ... Customizing the EVM 3 1 3 1 Inverting Configuration 3 2 3 2 Differential Configuration 3 2 3 3 Special Note on Gain and Input Configuration 3 2 3 3 Single Power Supply Configuration 3 2 4 EVM Circuit and Layout 4 1 4 1 TPA6120A2 EVM Top Layer 4 2 4 2 TPA6120A2 EVM Bottom Layer 4 3 4 3 Component Selection 4 4 4 4 Input Bias Voltage 4 4 4 5 Schematic 4 5 4 6 Bill of Materials 4 6 ...

Page 8: ...With Numbered Callouts 2 3 4 1 Top Layer of the TPA6120A2 EVM 4 2 4 2 Bottom Layer of the TPA6120A2 EVM 4 3 4 3 TPA6120A2 EVM Schematic 4 5 1 1 TPA6120A2 EVM Performance Specifications 1 2 4 1 TPA6120A2 EVM Bill of Materials 4 6 ...

Page 9: ...20A2 is a high fidelity audio amplifier The amplifier can operate from a split power supply and is designed for low noise high dynamic range performance Topic Page 1 1 Description 1 2 1 2 Performance Specifications 1 2 Chapter 1 ...

Page 10: ...able 1 1 TPA6120A2 EVM Specifications TPA6120A2 Supply voltage range VCC 5 V to 15 Power supply current rating required 1 A Continuous output power Po 32 Ω stereo VCC 12 V 2 W Audio input voltage VI VCC to VCC Minimum load impedance Z L 8 Ω CAUTION 1 Accidental swapping of supply polarities causes damage to the device and can cause damage to the other components on the board 2 Do not short the out...

Page 11: ... configuration No soldering is necessary Connection to the TPA6120A2 EVM can be made with banana plugs RCA jacks and a 1 4 inch headphone jack See Figure 2 1 for an illustration of the top layer Topic Page 2 1 Power Supply 2 2 2 2 Inputs and Outputs 2 2 2 3 Power Up 2 2 Chapter 2 ...

Page 12: ... jack labeled LIN J5 and the right signal source to the RCA jack labeled RIN J6 7 Insert headphones into 1 4 inch headphone jack J10 8 If desired RCA Jacks J1 and J2 may be used instead of the headphone jack for load driving purposes The RCA jacks and the headphone jack should not be used together when both are driving a load One may be used to drive a load while the other is used for measurement ...

Page 13: ...Power Up 2 3 Getting Started Figure 2 1 Top Layer With Numbered Callouts From paragraphs 2 1 through 2 3 8 7 8 2 9 6 3 9 6 4 ...

Page 14: ...Power Up 2 4 This page has been left blank intentionally ...

Page 15: ...ble and can be converted to operate in inverting and differential configurations The TPA6120A2 EVM can also be operated in a single power supply configuration Topic Page 3 1 Inverting Configuration 3 2 3 2 Differential Configuration 3 2 3 3 Special Note on Gain and Input Configurations 3 2 3 4 Single Power Supply Configuration 3 2 Chapter 3 ...

Page 16: ...n Gain and Input Configurations The TPA6120A2 high fidelity audio power amplifier has two separate channels left and right It is not necessary to operate each channel in the same configuration For test purposes it may be desirable to operate the left channel with a noninverting configuration and the right channel with an inverting configuration One channel may be configured to operate with differe...

Page 17: ...e available but intentionally left unpopulated to keep signal interference as low as possible This chapter includes the EVM layout the TPA6120A2 EVM component selection schematic and bill of materials Topic Page 4 1 TPA6120A2 EVM Top Layer 4 2 4 2 TPA6120A2 EVM Bottom Layer 4 3 4 3 Component Selection 4 4 4 4 Input Bias Voltage 4 4 4 5 Schematic 4 5 4 6 Bill of Materials 4 6 Chapter 4 ...

Page 18: ... EVM requires that RIN and LIN be at ground Rather than have the signal go through the long signal trace to get to the input jacks 0 Ω resistors R11 and R12 are used to provide a connection to ground much closer to the device A star point for ground should be chosen For the TPA6120A2 EVM the ground terminal of the board is J7 Current paths to the star ground should be as direct as possible Figure ...

Page 19: ...shows the bottom layer of the TPA6120A2 EVM Note that the copper has been removed from around the capacitive sensitive nodes It is important to remember that the thermal pad on the underside of the IC must be properly soldered to the board at all times Figure 4 2 Bottom Layer of the TPA6120A2 EVM ...

Page 20: ...ts typically up to the rail A 12 V offset with a 32 Ω load can draw up to 375 mA of current depending on the size of the output series resistor When a source is then connected or turned on and thus taken out of a high impedance state the offset voltage quickly drops to near 0 V This large fast change can cause a loud potentially headphone damaging POP The solution is to keep the positive input pin...

Page 21: ...imal since for most sources a 4 02 kΩ load is seen as high impedance Going from 4 02 kΩ to 10 kΩ results in a minimal performance increase but pushes the output offset voltage past the 100 mV threshold 4 5 Schematic Figure 4 3 TPA6120A2 EVM Schematic TPA6120A2 LVCC LOUT LVCC LIN LIN RVCC ROUT RVCC RIN RIN R3 1 kW C1 0 1 mF R13 DNP C3 0 1 mF R9 4 02 kW R4 1 kW R14 DNP R5 10 W R10 4 02 kW C4 0 1 mF ...

Page 22: ...220P102B R5 R6 2 10 Ω 0 1 330 mW TCR 25 PPM C 1206 Vishay P1206E10R0BB R7 R8 2 49 9 Ω 0 1 1 10W TCR 25 PPM C 0805 Thin Film Technology RR1220P49R9B Thin Film Technology RR1220P49R9B R11 R12 2 10 mΩ 2 0 0805 Thin Film Technology RL1220TR010G Thin Film Technology RL1220TR010G R9 R10 2 4 02 kΩ 0 1 1 10W TCR 25 PPM C 0805 Thin Film Technology RR1220P4021B Thin Film Technology RR1220P4021B R13 R14 2 Do...

Reviews: