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TPA3112D1 Datasheet Preview

TPA3112D1 Datasheet

25-W Filter-Free Mono Class-D Audio Power Amplifier

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TPA3112D1
SLOS654D – AUGUST 2009 – REVISED DECEMBER 2016
TPA3112D1 25-W Filter-Free Mono Class-D Audio Power Amplifier With SpeakerGuard™
1 Features
1 25-W into an 8-Load at < 0.1% THD+N From a
24-V Supply
• 20-W into an 4-Load at 10% THD+N From a
12-V Supply
• 94% Efficient Class-D Operation into 8-Load
Eliminates Need for Heat Sinks
• Wide Supply Voltage Range Allows Operation
from 8 to 26 V
• Filter-Free Operation
• SpeakerGuard™ Speaker Protection Includes
Adjustable Power Limiter plus DC Protection
• Flow Through Pin Out Facilitates Easy Board
Layout
• Robust Pin-to-Pin Short Circuit Protection and
Thermal Protection with Auto-Recovery Option
• Excellent THD+N/ Pop Free Performance
• Four Selectable, Fixed Gain Settings
• Differential Inputs
2 Applications
• Televisions
• Consumer Audio Equipment
3 Description
The TPA3112D1 is a 25-W efficient, Class-D audio
power amplifier for driving a bridge tied speaker.
Advanced EMI Suppression Technology enables the
use of inexpensive ferrite bead filters at the outputs
while meeting EMC requirements. SpeakerGuard
speaker protection system includes an adjustable
power limiter and a DC detection circuit. The
adjustable power limiter allows the user to set a
virtual voltage rail lower than the chip supply to limit
the amount of current through the speaker. The DC
detect circuit measures the frequency and amplitude
of the PWM signal and shuts off the output stage if
the input capacitors are damaged or shorts exist on
the inputs.
The TPA3112D1 can drive a mono speaker as low as
4. The high efficiency of the TPA3112D1, > 90%,
eliminates the need for an external heat sink when
playing music.
The outputs are fully protected against shorts to
GND, VCC, and output-to-output. The short-circuit
protection and thermal protection includes an auto-
recovery feature.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPA3112D1
HTSSOP (28)
4.40 mm × 9.70 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Audio
Source
OUT+
OUT -
Simplified Application Diagram
1uF
INP TPA3112D1
INN
GAIN0
GAIN1
PLIMIT
OUTP
OUTN
FERRITE
BEAD
FILTER
25W
8Ω
Fault
SD
PVCC
8 to 26V
Copyright © 2016, Texas Instruments Incorporated
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.




etcTI

TPA3112D1 Datasheet Preview

TPA3112D1 Datasheet

25-W Filter-Free Mono Class-D Audio Power Amplifier

No Preview Available !

TPA3112D1
SLOS654D – AUGUST 2009 – REVISED DECEMBER 2016
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Pin Configuration and Functions ......................... 3
6 Specifications......................................................... 4
6.1 Absolute Maximum Ratings ..................................... 4
6.2 ESD Ratings ............................................................ 4
6.3 Recommended Operating Conditions...................... 4
6.4 Thermal Information ................................................. 5
6.5 DC Characteristics, VCC = 24 V ............................... 5
6.6 DC Characteristics, VCC = 12 V ............................... 5
6.7 AC Characteristics, VCC = 24 V ............................... 6
6.8 AC Characteristics, VCC = 12 V ............................... 6
6.9 Typical Characteristics .............................................. 7
7 Detailed Description ............................................ 10
7.1 Overview ................................................................. 10
7.2 Functional Block Diagram ....................................... 11
7.3 Feature Description................................................. 11
7.4 Device Functional Modes........................................ 14
8 Application and Implementation ........................ 16
8.1 Application Information............................................ 16
8.2 Typical Application ................................................. 16
9 Power Supply Recommendations...................... 21
10 Layout................................................................... 22
10.1 Layout Guidelines ................................................. 22
10.2 Layout Example .................................................... 23
11 Device and Documentation Support ................. 24
11.1 Device Support .................................................... 24
11.2 Documentation Support ....................................... 24
11.3 Recieving Notification of Documentation Updates 24
11.4 Community Resources.......................................... 24
11.5 Trademarks ........................................................... 24
11.6 Electrostatic Discharge Caution ............................ 24
11.7 Glossary ................................................................ 24
12 Mechanical, Packaging, and Orderable
Information ........................................................... 25
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision C (July 2012) to Revision D
Page
• Added Device Information table, ESD Ratings table, Feature Description section, Device Functional Modes,
Application and Implementation section, Power Supply Recommendations section, Layout section, Device and
Documentation Support section, and Mechanical, Packaging, and Orderable Information section. .................................... 1
2 Submit Documentation Feedback
Product Folder Links: TPA3112D1
Copyright © 2009–2016, Texas Instruments Incorporated


Part Number TPA3112D1
Description 25-W Filter-Free Mono Class-D Audio Power Amplifier
Maker etcTI
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