TPA3111D1_17 Datasheet, PDF (1/31 Pages) Texas Instruments – 10-W Filter-Free Mono Class-D Audio Power Amplifier With Speaker Guard

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TPA3111D1
SLOS618F – AUGUST 2009 – REVISED JULY 2016
TPA3111D1 10-W Filter-Free Mono Class-D Audio Power Amplifier With Speaker Guard™
1 Features
•1 10-W into an 8-Ω Load at 10% THD+N From a
12-V Supply
• 7-W into an 4-Ω Load at 10% THD+N From a 8-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™ Speaker Protection Includes
Adjustable Power Limiter Plus DC Protection
• Flow-Through Pinout 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
2 Applications
• Televisions
• Monitors and Laptops
• Consumer Audio Equipment
3 Description
The TPA3111D1 device is a 10-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 lets the user to set a
virtual voltage rail lower than the chip supply to limit
the 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 TPA3111D1 can drive a mono speaker as low as
4 Ω. The high efficiency of the TPA3111D1, >90%,
eliminates the requirement 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)
TPA3111D1
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
TPA3111D1
INN
GAIN0
GAIN1
OUTP
OUTN
FERRITE
BEAD
FILTER
10W
8Ω
PLIMIT
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.