TAS5121I Datasheet, PDF (1/18 Pages) Texas Instruments – DIGITAL AMPLIIFIER POWER STAGE

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TAS5121I
SLES122 – SEPTEMBER 2004
TM
DIGITAL AMPLIFIER POWER STAGE
FEATURES
• 100-W RMS Power (BTL) Into 4 Ω With Less
Than 10% THD+N
• 80-W RMS Power (BTL) Into 4 Ω With Less
Than 0.2% THD+N
• 0.09% THD+N at 1 W Into 4 Ω
• Power Stage Efficiency Greater Than 90% Into
4-Ω Load
• Self-Protecting Design
• Industrial Temperature Rating
• 36-Pin PSOP3 Package
• 3.3-V Digital Interface
• EMI Compliant When Used With
Recommended System Design
APPLICATIONS
• DVD Receiver
• Home Theatre
TOTAL HARMONIC DISTORTION + NOISE
vs
POWER
10
R_L = 4 Ω
T_C = 75°C
Gain = 3 dB
1
0.1
0.01
0.1
6Ω
4Ω
8Ω
1
10
P − Power − W
100
G001
• Mini/Micro Component Systems
• Internet Music Appliance
DESCRIPTION
The TAS5121I is a high-performance, digital-amplifier
power stage designed to drive a 4-Ω speaker up to
100 W. The TAS5121I is rated for operation at
industrial temperatures. The device incorporates
PurePath Digital™ technology and can be used with
a TI audio pulse-width modulation (PWM) processor
and a simple passive demodulation filter to deliver
high-quality, high-efficiency, digital-audio amplifi-
cation.
The efficiency of this digital amplifier can be greater
than 90%, depending on the system design.
Overcurrent protection, overtemperature protection,
and undervoltage protection are built into the
TAS5121I, safeguarding the device and speakers
against fault conditions that could damage the sys-
tem.
UNCLIPPED OUTPUT POWER
vs
H-BRIDGE VOLTAGE
90
80
70
4Ω
60
6Ω
50
40
30
20
8Ω
10
0
0 4 8 12 16 20 24 28 32
PVDD_X − H-Bridge Voltage − V
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.
PurePath Digital, PowerPAD are trademarks of Texas Instruments.
All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2004, Texas Instruments Incorporated