TPA3221DDVR 100W Stereo Class-D Amp 92% Efficiency 4.5-26V Supply Advanced Protection Low THD+N & EMI I2C Control for High-Quality Audio Systems

Features

• Wide 7V to 30V Supply Voltage Operation

• Stereo (2 x BTL) and mono (1 x PBTL) operation

• Output Power at 10% THD+N

– 105W Stereo into 4Ω in BTL Configuration

– 112W Stereo into 3Ω in BTL Configuration

– 208W Mono into 2Ω in PBTL Configuration

• Output Power at 1% THD+N

– 88W Stereo into 4Ω in BTL Configuration

– 100W Stereo into 3Ω in BTL Configuration

– 170W Mono into 2Ω in PBTL Configuration

• 5V Gate drive or built-in LDO for optional single supply operation

• Closed-loop feedback design

– Signal Bandwidth up to 100kHz for High Frequency Content From HD Sources

– 0.02% THD+N at 1W into 4Ω

– 60dB PSRR (BTL, No input signal)

– <75µV output noise (A-weighted)

– >108dB SNR (A-weighted)

– AD or HEAD modulation schemes

• Low-Power operating modes

– Standby modes: mute and < 1mA 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: 18dB, 24dB, 30dB, 34dB

• 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 (4Ω)

• Thermal pad located on package bottom

• Pin-compatible family of devices with voltage and power-level options

Applications

• Bluetooth and Wi-Fi™ speakers

• Soundbars

• Subwoofers

• Bookshelf stereo systems

• Professional and public address (PA) speakers

Description

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 100kHz, 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 105W into 4Ω load or 1 x 208W into 2Ω load.

The TPA3221 features a single-ended or differential analog-input interface that supports up to 2VRMS with four selectable gains: 18dB, 24dB, 30dB and 34dB. The TPA3221 also achieves >90% efficiency, low idle power (<0.25W) and ultra-low standby power (<0.1W). This is made possible through the use of 70mΩ 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, cycle-by-cycle current limit, short circuit, clipping detection, overtemperature warning and shutdown, as well as DC speaker protection.

INFORMATION

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