TPA2017D2 Datasheet, PDF (1/20 Pages) Texas Instruments – 2.8-W/Ch Stereo Class-D Audio Amplifier with SmartGainTM Dynamic Range Compression and AGC

TPA2017D2
www.ti.com ..................................................................................................................................................................................................... SLOS584 – APRIL 2009
2.8-W/Ch Stereo Class-D Audio Amplifier with SmartGain^TM Dynamic Range Compression
and AGC
FEATURES
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• Filter-Free Class-D Architecture
• 3 SmartGain^TM functions
– AGC DRC Function
– AGC Limiter Function
– AGC Noise Gate Function
• 1.7 W/Ch Into 8 Ω at 5 V (10% THD+N)
• 750 mW/Ch Into 8 Ω at 3.6 V (10% THD+N)
• 2.8 W/Ch Into 4 Ω at 5 V (10% THD+N)
• 1.5 W/Ch Into 4 Ω at 3.6 V (10% THD+N)
• Power Supply Range: 2.5 V to 5.5 V
• Low Supply Current: 3.5 mA
• Low Shutdown Current: 0.2 µA
• High PSRR: 75 dB at 217 Hz
• Fast Start-up Time: 5 ms
• Short-Circuit and Thermal Protection
• Space-Saving Package
– 4 mm × 4 mm QFN (RTJ)
APPLICATIONS
• Wireless or Cellular Handsets and PDAs
• Portable Navigation Devices
• Portable DVD Player
• Notebook PCs
• Portable Radio
• Portable Games
• Educational Toys
• USB Speakers
DESCRIPTION
The TPA2017D2 (sometimes referred to as
TPA2017) is a stereo, filter-free Class-D audio power
amplifier with SmartGain^TM dynamic range
compression (DRC), automatic gain control (AGC),
and noise gate. It is available in a 4 mm x 4mm QFN
package.
SmartGain^TM functions are configured to
automatically prevent distortion of the audio signal
and enhance quiet passages that are normally not
heard. SmartGain^TM is a combined AGC DRC and
Limiter that protects the speaker from damage at high
power levels and compress the dynamic range of
voice or music to fit within the dynamic range of the
speaker. SmartGain^TM DRC, limiter, and noise gate
functions can be enabled or disabled. The
TPA2017D2 (TPA2017) is capable of driving 1.7
W/Ch at 4 V or 750mW/Ch at 3.6 V into 8 Ω load or
2.8 W/Ch at 5 V or 1.5 W/Ch at 3.6 V into 4 Ω. The
device features an enable pin and also provides
thermal and short circuit protection.
In addition to these features, a fast start-up time and
small package size make the TPA2017D2 (TPA2017)
an ideal choice for Notebook PCs, PDAs and other
portable applications.
SIMPLIFIED APPLICATION DIAGRAM
To Battery
Analog
Baseband
or
CODEC
10mF
AVdd PVddL PVddR
C_IN 1mF
(optional)
INL-
INL+
TPA2017D2
OUTL+
INR-
INR+
OUTL-
OUTR+
Digital
BaseBand
Enable1
AGC1
Enable2
AGC2
Master Shutdown _EN
AGND
OUTR -
PGND
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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.
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 © 2009, Texas Instruments Incorporated