Texas Instruments eZAudio TPA2015D1 User Manual Download Page 7 | Manualshive

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Texas Instruments eZAudio TPA2015D1 User Manual Download Page 7

Hardware Description

11. MP3 Player. Increase the volume of the MP3 player to 100%.

12. Joystick. Move the joystick to the right until BOOST is displayed

13. Joystick. Move the joystick down to disable the BOOST.

Explanation. When the boost is disabled, the sound is distorted because the signal is clipped at the
battery voltage rails. When boost is enabled, the increased headroom for the output swing significantly
reduces clipping.

3

Hardware Description

3.1

TPA2015D1 Features

2-W constant output, mono Class-D audio amplifier with integrated boost converter and battery tracking
SpeakerGuard

™

AGC

7

SLOU312

–

June 2011

eZAudio TPA2015D1 Demonstration Kit

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Copyright

©

2011, Texas Instruments Incorporated

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Summary of Contents for eZAudio TPA2015D1

Page 1: ...e 3 2 2 Running the Demonstration 4 3 Hardware Description 7 3 1 TPA2015D1 Features 7 4 Schematics PCB and Bill of Materials 9 4 1 Schematics 9 4 2 Printed Circuit Board 12 4 3 Bill of Materials 17 Ap...

Page 2: ...designed for evaluation the kit does contain a mini PCB that can be used for evaluation purposes NOTE This document presents evaluation module EVM specifications audio performance measurements graphs...

Page 3: ...from an external 5 V supply with a 600 mA rating 2 Quick Start Guide 2 1 Powering the Device 1 Speaker Plug the speaker into the white jack on the left side of the board 2 Audio Cable Plug 3 5 mm audi...

Page 4: ...r left corner to the right To turn off hold the Play button for 3 seconds 2 2 Running the Demonstration The device defaults to the following settings when booting up Gain 20 dB AGC 3 97 V VDD 3 60 V B...

Page 5: ...Notice that the current draw 250 mA and power output 0 45 W decrease Explanation This demonstrates the battery tracking feature of the TPA2015D1 When the battery voltage reaches the AGC threshold the...

Page 6: ...he battery voltage The current increases in order to maintain power output The audio also sounds distorted without AGC enabled 8 Joystick Move the joystick up until AGC is enabled by choosing one of t...

Page 7: ...s distorted because the signal is clipped at the battery voltage rails When boost is enabled the increased headroom for the output swing significantly reduces clipping 3 Hardware Description 3 1 TPA20...

Page 8: ...ery voltage 3 V Battery tracking SpeakerGuard Protects speakers by preventing clipping High efficiency 81 at 1 W and 3 6 V Eliminates GSM TDMA frame rate noise Very high PSRR 90 dB 27 Better efficienc...

Page 9: ...0 90 9Kohms 392Kohms GND R12 499Kohms AGC and Gain control Input Section Vrms Capture Voltage divider to accomodate VFS of A D converter eZ Audio TPA2015D1 Demo Kit www ti com Schematics PCB and Bill...

Page 10: ...USB NC NC Case Case Case Case Data GND ID_NC 5v Data GND 1 2 BP1 L4 2 1 R26 470mohms 1 8V to 4 8V Adjustable Output 1A Step Down Converter EVM Supply Generation 100 Kohm Digital Pot IBAT Meter Shunt...

Page 11: ...OY STICK GND GND GND R43 5 1Kohms www ti com Schematics PCB and Bill of Materials Figure 3 MSP430 Schematic Figure 4 Display and Joystick Schematics 11 SLOU312 June 2011 eZAudio TPA2015D1 Demonstratio...

Page 12: ...and Bill of Materials www ti com 4 2 Printed Circuit Board Figure 5 Top Assembly 12 eZAudio TPA2015D1 Demonstration Kit SLOU312 June 2011 Submit Documentation Feedback Copyright 2011 Texas Instrument...

Page 13: ...w ti com Schematics PCB and Bill of Materials Figure 6 Bottom Copper 13 SLOU312 June 2011 eZAudio TPA2015D1 Demonstration Kit Submit Documentation Feedback Copyright 2011 Texas Instruments Incorporate...

Page 14: ...Schematics PCB and Bill of Materials www ti com Figure 7 Top Copper 14 eZAudio TPA2015D1 Demonstration Kit SLOU312 June 2011 Submit Documentation Feedback Copyright 2011 Texas Instruments Incorporated...

Page 15: ...w ti com Schematics PCB and Bill of Materials Figure 8 Copper Layer 2 15 SLOU312 June 2011 eZAudio TPA2015D1 Demonstration Kit Submit Documentation Feedback Copyright 2011 Texas Instruments Incorporat...

Page 16: ...hematics PCB and Bill of Materials www ti com Figure 9 Copper Layer 3 16 eZAudio TPA2015D1 Demonstration Kit SLOU312 June 2011 Submit Documentation Feedback Copyright 2011 Texas Instruments Incorporat...

Page 17: ...R20 R21 RESISTOR SMT 0603 1 1 10W 1 00K VISHAY CRCW06031003F 4 R5 R6 R40 R41 RESISTOR SMT 0603 1 1 10W 100K VISHAY 0603YC104JAT2A 4 C4 C12 C16 C26 CAPACITOR SMT 0603 CERAMIC 0 1uF 16V 5 X7R AVX 2163...

Page 18: ...22JAT2A 1 C31 CAPACITOR SMT 0603 CERAMIC 0 0022uF 50V 5 X7R AVX ECS T1CY105R 1 C35 CAP TAN SMT 1 0uF 16V 20 DF 0 04 PANASONIC EVQ PPBA25 1 S1 SWITCH SMT 2P SPST NO 2 5mm HEIGHT DUST PROOF PANASONIC LT...

Page 19: ...Gain0 Gain1 TPA2015D1 Gain0 Gain1 Gain Gain Pin L L Float 15 5 dB H L Vdd 2 15 5 dB L H Vdd 20 dB H H GND 6 dB L 0 V and H 3 3 V Gain0 and Gain1 change the gain settings for the TPA2015D1 They control...

Page 20: ...al potentiometers have been set to default conditions and Default VDD voltage has been measured by Stellaris MCU VDD default is 3 6 V REG_EN This control signal enables U6 the adjustable VDD regulator...

Page 21: ...age range 1 8 V to 4 8 V For the full voltage range use USB power option batteries give only up to 4 5 V For more information on the digital potentiometer see the TPL0102 data sheet SLIS134 Table 2 Co...

Page 22: ...VM Power up Sequence 1 ENB Low 2 END Low 3 REG_EN Low 4 Gain0 Low 5 Gain1 Low 6 AGC0 Low 7 AGC1 Low 8 Set Digital pot wiper resistance to position 41 write 0x29 to register 0x00 and wait 50 ms 9 REG_E...

Page 23: ...uct This notice contains important safety information about temperatures and voltages For additional information on TI s environmental and or safety programs please contact the TI application engineer...

Page 24: ...orized for use in safety critical applications such as life support where a failure of the TI product would reasonably be expected to cause severe personal injury or death unless officers of the parti...

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