Texas Instruments TPA3120D2 User Manual

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FEATURES
1
25-W/ch into a 4-Ω Load from a 27-V Supply
2
20-W/ch into a 4-Ω Load from a 24-V Supply
Operates from 10 V to 30 V
Efficient Class-D Operation Eliminates Need
for Heat Sinks
Four Selectable, Fixed-Gain Settings
Internal Oscillator (No External Components
Required)
Single-Ended Analog Inputs
Thermal and Short-Circuit Protection With
Auto Recovery
Space-Saving Surface-Mount 24-Pin TSSOP
Package
APPLICATIONS
Televisions
Left Channel
Right Channel
10 V to 30 V
Shutdown
Mute Control
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.
System Two, Audio Precision are trademarks of Audio Precision, Inc.
2
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.
25-W STEREO CLASS-D AUDIO POWER AMPLIFIER
TPA3120D2
SIMPLIFIED APPLICATION CIRCUIT
1 F
m
1 F
m
1 F
m
Control
SLOS507E – MARCH 2007 – REVISED SEPTEMBER 2007
DESCRIPTION
The TPA3120D2 is a 25-W (per channel) efficient,
Class-D audio power amplifier for driving stereo
speakers in a single-ended configuration or a mono
bridge-tied speaker. The TPA3120D2 can drive
stereo speakers as low as 4 Ω. The efficiency of the
TPA3120D2 eliminates the need for an external heat
sink when playing music.
The gain of the amplifier is controlled by two gain
select pins. The gain selections are 20, 26, 32,
36 dB.
The patented start-up and shut-down sequences
minimize pop noise in the speakers without additional
circuitry.
TPA3120D2
0.22 F
m
LIN BSR
RIN ROUT
PGNDR
PGNDL
LOUT
BYPASS
AGND BSL
0.22 F
m
PVCCL
AVCC
PVCCR
VCLAMP
SD
1 F
m
MUTE
GAIN0
GAIN1
22 H 470 F
m m
0.68 F
m
0.68 F
m
22 H
470 F
m
m
10 V to 30 V
}
4-Step Gain
Control
Copyright © 2007, Texas Instruments Incorporated
TPA3120D2