TPA3121D2PWPR ,15-W Stereo Class-D Audio Power Amplifier with SE Outputs (TPA3121) 24-HTSSOP -40 to 85These devices have limited built-in ESD protection. The leads should be shorted together or the dev ..
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TPA3121D2PWPR
15-W Stereo Class-D Audio Power Amplifier with SE Outputs (TPA3121)
Fm
TPA3121D2
SIMPLIFIED APPLICATION CIRCUITPVCCR
VCLAMP
GAIN1
BYPASSFmFm
0.22Fm
AGND
Left Channel
Right Channel
LIN
RIN
BSR
BSL
PGNDR
PGNDL
0.22FmHmHm
0.22Fm
470Fm
0.22FmFm
470Fm
GAIN0
AVCC
MUTE
ROUT
LOUT
S0267-01
TPA3121D2
www.ti.com SLOS537B –MAY 2008–REVISED JANUARY 2014
15-W STEREO CLASS-D AUDIO POWER AMPLIFIER
Checkfor Samples: TPA3121D2
1FEATURES APPLICATIONS
23• 10-W/Ch Stereo Intoan 8-Ω Load Froma 24-V • Flat Panel Display TVs
Supply • DLP® TVs 15-W/Ch Stereo Intoa 4-Ω Load froma 22-V • CRT TVs
Supply • Powered Speakers 30-W/Ch Mono Into an 8-Ω Load froma 22-V
Supply DESCRIPTION Operates From10Vto26V The TPA3121D2isa 15-W (per channel), efficient,
class-D audio power amplifier for driving stereo
• Can Run From +24V LCD Backlight Supply speakersina single-ended configurationora mono
• Efficient Class-D Operation Eliminates Need speaker ina bridge-tied-load configuration. The
for Heat Sinks TPA3121D2 can drive stereo speakersas lowas4Ω.
Four Selectable, Fixed-Gain Settings The efficiencyof the TPA3121D2 eliminates the need
foran external heat sink when playing music.
• Internal Oscillatorto Set ClassD Frequency
(No External Components Required) The gainof the amplifieris controlled by two gain
select pins. The gain selections are 20, 26, 32, and
• Single-Ended Analog Inputs dB.
• Thermal and Short-Circuit Protection With
Auto Recovery The patented start-up and shutdown sequences
minimize pop noisein the speakers without additional
• Space-Saving Surface Mount 24-Pin TSSOP circuitry.
Package Advanced Power-Off Pop Reduction
