TPA3112D1-Q1 Datasheet, PDF (1/32 Pages) Texas Instruments – Filter-Free Mono Class-D Audio Power Amplifier

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TPA3112D1-Q1
SLOS793B – SEPTEMBER 2012 – REVISED SEPTEMBER 2015
TPA3112D1-Q1 25-W Filter-Free Mono Class-D
Audio Power Amplifier With SpeakerGuard™
1 Features
•1 Qualified for Automotive Applications
• AEC-Q100 Qualified With the Following Results:
– Device Temperature Grade 1: –40°C to 125°C
Ambient Operating Temperature Range
– Device HBM ESD Classification Level H2
– Device CDM ESD Classification Level C2
• 25-W into an 8-Ω Load at < 0.1% THD+N From a
24-V Supply
• 20-W into an 4-Ω Load at 10% THD+N From a
12-V Supply
• 94% Efficient Class-D Operation into 8-Ω Load
Eliminates Need for Heat Sinks
• Wide Supply Voltage Range Allows Operation
from 8 to 26 V
• Filter-Free Operation
• SpeakerGuard Protection Circuitry 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 and Pop Free Performance
• Four Selectable, Fixed Gain Settings
• Differential Inputs
3 Description
The TPA3112D1-Q1 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™ protection circuitry 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-Q1 can drive a mono speaker as
low as 4 Ω. The high efficiency of the device, > 90%,
eliminates the need for an external heat sink when
playing music.
The outputs are fully protected against shorts to
GND, V_CC, 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-Q1
HTSSOP (28)
9.70 mm × 4.40 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
2 Applications
• Automotive Noise Generation for HEV/EV
• Automotive Emergency Call Systems (eCall)
• Automotive Infotainment Systems (i.e. Head Unit,
Connectivity Gateway, Cluster, Telematics,
Navigation)
• ADAS Noise Generation for Blind Spot Detection,
Security and Alarm Systems
• Professional Audio Equipment (i.e. PA Speakers,
Studio Headphones, Performance Amplifiers,
Premium Microphones)
• Aerospace and Aviation Audio Systems
Audio
Source
Simplified Application Diagram
OUT+
OUT -
1 µF
INP
INN
TPA3112D1-Q1
GAIN0
GAIN1
OUTP
OUTN
FERRITE
BEAD
FILTER
25 W
8Ω
PLIMIT
Fault
SD
PVCC
8 to 26 V
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.