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TPA3110D2-Q1 Datasheet(PDF) 25 Page - Texas Instruments

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Part # TPA3110D2-Q1
Description  Filter-Free Stereo Class-D Audio Power Amplifier
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

TPA3110D2-Q1 Datasheet(HTML) 25 Page - Texas Instruments

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TPA3110D2-Q1
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SLOS794B – SEPTEMBER 2012 – REVISED SEPTEMBER 2015
9 Power Supply Recommendations
The TPA3110D2-Q1 is a high-performance CMOS audio amplifier that requires adequate power supply
decoupling to ensure that the output total harmonic distortion (THD) is as low as possible. Power supply
decoupling also prevents oscillations for long lead lengths between the amplifier and the speaker.
Optimum decoupling is achieved by using a network of capacitors of different types that target specific types of
noise on the power supply leads. For higher frequency transients due to parasitic circuit elements such as bond
wire and copper trace inductances as well as lead frame capacitance, a good quality low equivalent-series-
resistance (ESR) ceramic capacitor of value between 220 pF and 1000 pF works well. This capacitor should be
placed as close to the device PVCC pins and system ground (either PGND pins or PowerPAD™ integrated
circuit package) as possible. For mid-frequency noise due to filter resonances or PWM switching transients as
well as digital hash on the line, another good quality capacitor typically 0.1
μF to 1 µF placed as close as
possible to the device PVCC leads works best.
For filtering lower frequency noise signals, a larger aluminum electrolytic capacitor of 220
μF or greater placed
near the audio power amplifier is recommended. The 220-
μF capacitor also serves as a local storage capacitor
for supplying current during large signal transients on the amplifier outputs. The PVCC terminals provide the
power to the output transistors, so a 220-µF or larger capacitor should be placed on each PVCC terminal. A 10-
µF capacitor on the AVCC terminal is adequate. Also, a small decoupling resistor between AVCC and PVCC can
be used to keep high frequency Class-D noise from entering the linear input amplifiers.
Copyright © 2012–2015, Texas Instruments Incorporated
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