TPA2016D2 datasheet(12/51 Pages) TI2

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C Interface

& Control

INL+

INL-

SDA

OUTL+

OUTL-

SDZ

INR+

INR-

SCL

Class-D

Modulator

Volume

Control

Differential

Input Left

C IN

1uF

Differential

Input Right

C IN

1uF

C Interface

IC shutdown

Power

Stage

AGC

Reference

Volume

Control

Power

Stage

OUTR+

OUTR-

AGND

PGND

Bias and

References

AVDD

PVDDR

PVDDL

AGC

Class-D

Modulator

TPA2016D2

SLOS524E – JUNE 2008 – REVISED MAY 2016

www.ti.com

Product Folder Links: TPA2016D2

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9 Detailed Description

9.1 Overview

The TPA2016D2 is a stereo Class-D audio power amplifier capable of driving 1.7 W/Ch at 5 V or 750 mW/Ch at

3.6 V into 8-

Ω load, and 2.8 W/Ch at 5 V or 1.5 W/Ch at 3.6 V into 4-Ω load. The device features independent

software shutdown controls for each channel and also provides thermal and short-circuit protection. In addition to

these features, a fast start-up time and small package size make the TPA2016D2 an ideal choice for cellular

handsets, PDAs, and other portable applications.

9.2 Functional Block Diagram

9.3 Feature Description

9.3.1 Operation With DACs and CODECs

In using Class-D amplifiers with CODECs and DACs, sometimes there is an increase in the output noise floor

from the audio amplifier. This occurs when mixing of the output frequencies of the CODEC/DAC mix with the

switching frequencies of the audio amplifier input stage. The noise increase can be solved by placing a lowpass

filter between the CODEC/DAC and audio amplifier. This filters off the high frequencies that cause the problem

and allow proper performance (see Functional Block Diagram).

If driving the TPA2016D2 input with 4th-order or higher

ΔΣ DACs or CODECs, add an RC lowpass filter at each

of the audio inputs (IN+ and IN–) of the TPA2016D2 to ensure best performance. The recommended resistor

value is 100

Ω and the capacitor value of 47 nF.

9.3.2 Filter-Free Operation and Ferrite Bead Filters

A ferrite bead filter can often be used if the design is failing radiated emissions without an LC filter and the

frequency sensitive circuit is greater than 1 MHz. This filter functions well for circuits that just have to pass FCC

and CE because FCC and CE only test radiated emissions greater than 30 MHz. When choosing a ferrite bead,

choose one with high impedance at high frequencies, and low impedance at low frequencies. In addition, select a

ferrite bead with adequate current rating to prevent distortion of the output signal.

TPA2016D2 Datasheet(PDF) 12 Page - Texas Instruments

TPA2016D2 Datasheet(HTML) 12 Page - Texas Instruments

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