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TPA3112D1PWPR データシート(PDF) 1 Page - Texas Instruments

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部品番号 TPA3112D1PWPR
部品情報  25-W FILTER-FREE MONO CLASS-D AUDIO POWER AMPLIFIER with SPEAKER GUARD?
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メーカー  TI [Texas Instruments]
ホームページ  http://www.ti.com
Logo TI - Texas Instruments

TPA3112D1PWPR データシート(HTML) 1 Page - Texas Instruments

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background image
INP
INN
SD
SD
Fault
Fault
PLIMIT
PLIMIT
PVCC
8to26V
1uF
OUTN
FERRITE
BEAD
FILTER
OUTP
25W
8Ω
OUTN
FERRITE
BEAD
FILTER
FERRITE
BEAD
FILTER
OUTP
8Ω
OUT+
-
OUT
Audio
Source
TPA3112D1
GAIN0
GAIN0
GAIN1
GAIN1
TPA3112D1
www.ti.com
SLOS654C – SEPTEMBER 2009 – REVISED JULY 2012
25-W FILTER-FREE MONO CLASS-D AUDIO POWER AMPLIFIER with SPEAKER GUARD™
Check for Samples: TPA3112D1
1
FEATURES
DESCRIPTION
2
25-W into an 8-
Ω Load at < 0.1% THD+N From
The TPA3112D1 is a 25-W efficient, Class-D audio
a 24-V Supply
power amplifier for driving a bridge tied speaker.
20-W into an 4-
Ω Load at 10% THD+N From a
Advanced EMI Suppression Technology enables the
12-V Supply
use of inexpensive ferrite bead filters at the outputs
94% Efficient Class-D Operation into 8-
Ω Load
while meeting EMC requirements. SpeakerGuard™
speaker protection system includes an adjustable
Eliminates Need for Heat Sinks
power limiter and a DC detection circuit. The
Wide Supply Voltage Range Allows Operation
adjustable power limiter allows the user to set a
from 8 to 26 V
"virtual" voltage rail lower than the chip supply to limit
Filter-Free Operation
the amount of current through the speaker. The DC
detect circuit measures the frequency and amplitude
SpeakerGuard™ Speaker Protection Includes
of the PWM signal and shuts off the output stage if
Adjustable Power Limiter plus DC Protection
the input capacitors are damaged or shorts exist on
Flow Through Pin Out Facilitates Easy Board
the inputs.
Layout
The TPA3112D1 can drive a mono speaker as low as
Robust Pin-to-Pin Short Circuit Protection and
4
Ω. The high efficiency of the TPA3112D1, > 90%,
Thermal Protection with Auto-Recovery Option
eliminates the need for an external heat sink when
Excellent THD+N/ Pop Free Performance
playing music.
Four Selectable, Fixed Gain Settings
The outputs are fully protected against shorts to
Differential Inputs
GND, VCC, and output-to-output. The short-circuit
protection and thermal protection includes an auto-
APPLICATIONS
recovery feature.
Televisions
Consumer Audio Equipment
Figure 1. Simplified Application Diagram
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2
SpeakerGuard, PowerPad are trademarks of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Copyright © 2009–2012, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.


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