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TPA2080D1YZGR Datasheet(PDF) 11 Page - Texas Instruments

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Part # TPA2080D1YZGR
Description  Constant Output Power Class-D Audio Amplifier
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
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TPA2080D1YZGR Datasheet(HTML) 11 Page - Texas Instruments

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11
TPA2080D1
www.ti.com
SLOS733B – JANUARY 2012 – REVISED APRIL 2016
Product Folder Links: TPA2080D1
Submit Documentation Feedback
Copyright © 2012–2016, Texas Instruments Incorporated
9 Detailed Description
9.1 Overview
The TPA2080D1 is a high-efficiency Class-D audio power amplifier with an integrated Class-G boost converter
that enhances efficiency at low output power. The built-in converter generates a 5.75-V supply voltage for the
Class-D amplifier when high output power is required. The device has a integrated low-pass filter to improve the
RF rejection and reduce DAC out-of-band noise, increasing the signal-to-noise ratio (SNR).
9.2 Functional Block Diagram
9.3 Feature Description
9.3.1 Fully Differential Amplifier
The TPA2080D1 is a fully differential amplifier with differential inputs and outputs. The fully differential amplifier
consists of a differential amplifier with common-mode feedback. The differential amplifier ensures that the
amplifier outputs a differential voltage on the output that is equal to the differential input times the gain. The
common-mode feedback ensures that the common-mode voltage at the output is biased around VCC/2
regardless of the common-mode voltage at the input. The fully differential TPA2080D1 can still be used with a
single-ended input; however, the TPA2080D1 must be used with differential inputs when in a noisy environment,
like a wireless handset, to ensure maximum noise rejection.
9.3.1.1 Advantages of Fully Differential Amplifiers
Input-coupling capacitors not required:
The fully differential amplifier allows the inputs to be biased at voltage other than mid-supply. The inputs of


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