TPA3220 - 50W Stereo / 100W Peak HD Analog-Input Pad-Down Class-D Amplifier

TPA3220 is a pad-down Class-D amplifier that enablesefficient operation at full-power, idle and standby. The device features closed-loop feedback witha bandwidth up to 100 kHz, which provides low distortion across the audio band and deliversexcellent sound quality. The device operates with either AD or low idle-current HEAD (HighEfficiency AD) modulation and can drive up to 2 x 60 W continuously or 2 x 110 W peak into 4-Ω loadwith the thermal pad on bottom connected to the PCB.

The TPA3220 features a single-ended or differential analog-inputinterface that supports up to 2 V_RMS with four selectable gains:18 dB, 24 dB, 30 dB and 34 dB. The TPA3220 alsoachieves >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 andlow-power operating modes. TPA3220 includes a built-in LDO for easy integrationin single-power-supply systems. To further simplify the design, the device integrates essentialprotection features including undervoltage, cycle-by-cyclecurrent limit, short circuit, clipping detection, overtemperature warning and shutdown, as well asDC speaker protection.

• Stereo (2 x BTL) and Mono (1 x PBTL) Operation
• Output Power at 10% THD+N
  • 60-W Stereo Continuous into 8 Ω in BTL
  • 110-W Stereo Peak into 4 Ω in BTL
• Output Power at 1% THD+N
  • 50-W Stereo Continuous into 8 Ω in BTL
  • 89-W Stereo Peak into 4 Ω in BTL
• 5-V Gate Drive or Built-in LDO for Optional Single-Supply Operation
• 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)
  • <72-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
• Integrated Protection: Undervoltage, Cycle-by-cycle Current Limit, Short Circuit, Clipping Detection, Overtemperature Warning and Shutdown, and DC Speaker Protection
• 90% Efficient Class-D Operation (4 Ω)
• Thermal Pad Located on Package Bottom
• Pin-Compatible Family of Devices with Voltage and Power-Level Options

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