TPA3221DDVR

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 V_RMS 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.

Key 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
• 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
• 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