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May 2004

HPA Audio Power

User’s Guide

SLOU169

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Содержание TPA6120A2

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

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 6: ...iv ...

Страница 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 ...

Страница 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 ...

Страница 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 ...

Страница 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...

Страница 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 ...

Страница 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 ...

Страница 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 ...

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

Страница 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 ...

Страница 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...

Страница 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 ...

Страница 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 ...

Страница 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 ...

Страница 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...

Страница 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 ...

Страница 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...

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