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TPA3221 Class-D Amplifier
Texas Instruments' TPA3221 is a 100 W stereo and 200 W mono HD analog-input Class-D amplifier

Texas Instruments' TPA3221 is a high-power Class-D amplifier that enables efficient operation at full-power, idle, and standby. The device features closed-loop feedback with a bandwidth up to 100 kHz, which provides low distortion across the audio band and delivers excellent sound quality. The device operates with either AD or low idle-current HEAD (high efficient AD mode) modulation, and can drive up to 2 x 105 W into 4 Ω load or 1 x 208 W into 2 Ω load.

The TPA3221 features a single-ended or differential analog-input interface that supports up to 2 VRMS with four selectable gains: 18 dB, 24 dB, 30 dB, and 34 dB. The TPA3221 also achieves >90% efficiency, low idle power (<0.25 W) and ultra-low standby power (<0.1 W). This is made possible through the use of 70 mΩ MOSFETs, an optimized gate drive scheme and low-power operating modes. TPA3221 includes a built-in LDO for easy integration in single-power-supply systems. To further simplify the design, the device integrates essential protection features including undervoltage, overvoltage, cycle-by-cycle current limit, short circuit, clipping detection, overtemperature warning and shutdown, as well as DC speaker protection.

Features
  • Wide 7 V to 30 V supply voltage operation
  • Stereo (2 x BTL) and mono (1 x PBTL) operation
  • Output power at 10% THD+N
    • 105 W stereo into 4 Ω in BTL configuration
    • 112 W stereo into 3 Ω in BTL configuration
    • 208 W mono into 2 Ω in PBTL configuration
  • Output power at 1% THD+N
    • 88 W stereo into 4 Ω in BTL configuration
    • 100 W stereo into 3 Ω in BTL configuration
    • 170 W mono into 2 Ω in PBTL configuration
  • 5 V gate drive or built-in LDO for optional single-supply operation
  • Integrated protection: undervoltage, overvoltage, cycle-by-cycle current limit, short circuit, clipping detection, overtemperature warning and shutdown, and DC speaker protection
  • 90% efficient Class-D operation (4 Ω)
  • Pin-compatible family of devices with voltage and power-level options
  • Closed-loop feedback design
    • Signal bandwidth up to 100 kHz for high-frequency content from HD sources
    • 0.02% THD+N at 1 W into 4 Ω
    • 60 dB PSRR (BTL, no input signal)
    • <75 µV output noise (A-weighted)
    • >108 dB SNR (A-weighted)
    • AD or HEAD modulation schemes
  • Low-power operating modes
    • Standby modes: mute and <1 mA shutdown
    • Low idle-current HEAD modulation scheme
    • Single-channel BTL operation
  • Multiple input options to simplify pre-amp design
    • Differential or single-ended analog inputs
    • Selectable gains: 18 dB, 24 dB, 30 dB, 34 dB
Applications
  • Wireless and powered speakers
  • Soundbars
  • Subwoofers
  • Bookshelf stereo systems
  • Professional and public address (PA) speakers
TPA3221 Class-D Amplifier
Image Manufacturer Part Number Description   View Details
TPA3221DDV datasheet link HIGH POWER AMPLIFIER TPA3221DDV HIGH POWER AMPLIFIER   TPA3221DDV product page link
TPA3221DDVR datasheet link TPA3221DDVR TPA3221DDVR TPA3221DDVR   TPA3221DDVR product page link

Evaluation Board
Image Manufacturer Part Number Description   View Details
TPA3221EVM datasheet link EVAL BOARD FOR TPA3221 TPA3221EVM EVAL BOARD FOR TPA3221   TPA3221EVM product page link
2018011105 / 14.02.2018 / Electronic-components / Digi-Key Electronics /

DigiKey Launches Season 3 of its "Farm Different" Video Series
DigiKey has launched season 3 of its "Farm Different" video series, sponsored by Analog Devices, Inc. (ADI) and Amphenol Industrial.

DigiKey Adds Over 450 New Suppliers and 1.7 Million New Parts in 2023
DigiKey, a leading global commerce distributor offering the largest selection of technical components and automation products in stock for immediate shipment, announced today that it expanded its portfolio in 2023 by adding more than 450 new suppliers across their core business, DigiKey Marketplace and Fulfilled by DigiKey program. The company added more than 1.7 million new accessible parts, including 230,000+ parts with inventory available to sell, across its core business in 2023.

DigiKey Stocks New eFuse Reference Design Product from Vishay
DigiKey, a leading global commerce distributor offering the largest selection of technical components and automation products in stock for immediate shipment, announced today that the EFUSE-48V100A reference design product from Vishay, a global technology leader in discrete semiconductors and passive components, is now available for purchase globally from DigiKey.

DigiKey’s 15th Annual DigiWish Giveaway Kicks Off on Dec. 1, 2023
DigiKey, a leading global commerce distributor offering the largest selection of technical components and automation products in stock for immediate shipment is excited to launch its 15th annual DigiWish Giveaway on Dec. 1, 2023. As the holiday season approaches, DigiKey is selecting 24 lucky winners to start the celebrations early, as part of the company’s continued mission to help engineers, designers and makers accelerate progress.

DigiKey to Showcase Automation Offerings at SPS Debut
The Smart Production Solutions (SPS) trade show is the largest automation show in Europe

DigiKey Adds 300 New Suppliers in First Half of 2023
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Second season explores building flexible, agile and resilient supply chains

Digi-Key Launches Global Capability Centre in Bengaluru
Digi-Key Electronics, which offers the world’s largest selection of electronic components and automation products in stock for immediate shipment, has launched its first Global Capability Centre (GCC). The 30,000 sq. ft. facility in Bhartiya City, Bengaluru, India, was recently inaugurated with the presence of several key leaders from Digi-Key and its support partner, SMC Squared (SMC2).

Digi-Key Announces Global Distribution Agreement with SPARK Microsystems
Digi-Key Electronics, which offers the world’s largest selection of electronic components in stock for immediate shipment, announced that it has secured a global distribution agreement with SPARK Microsystems to offer ultra-low power wireless communications for high-performance personal area networks and IoT-connected devices.

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